Negative pressure swing arm for inner frame paper positioning and conveying

Abstract

The present invention relates to the technical field of tobacco packaging machines, and in particular to a negative pressure swing arm for positioning and conveying inner frame paper, comprising a swing arm hollow tube with an axially opened air vent and two swing arm supports arranged on the swing arm hollow tube at intervals along the axial direction of the swing arm hollow tube, the swing arm support having an adsorption surface for adsorbing the inner frame paper, a first negative pressure hole and a second negative pressure hole with one end connected to the vent and the other end penetrating the adsorption surface, the first negative pressure hole and the second negative pressure hole being respectively located at both ends of the adsorption surface along a direction perpendicular to the axial direction of the swing arm hollow tube on the adsorption surface. A total of four negative pressure holes in the two swing arm supports are used to absorb the four corners of the inner frame paper respectively, and the four negative pressure holes constitute a suction surface, which can greatly increase the negative pressure suction force and the ability to pick up the inner frame paper, improve the stability of the positioning and conveying of the inner frame paper, ensure that the inner frame paper can be smoothly adsorbed, and avoid the problem of the inner frame paper tilting and dragging.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco packaging machines, in particular to a negative pressure swing arm for positioning and conveying inner frame paper. Background Art

[0002] In tobacco machinery, rigid case packaging machines are primarily responsible for wrapping cigarettes in aluminum foil, adding inner frame paper, folding and wrapping the label paper, and sealing with transparent paper. This ensures that the cigarette packs retain moisture and fragrance, while maintaining a crisp and aesthetically pleasing appearance, meeting the company's quality and brand requirements. With continuous brand innovation, companies are introducing a variety of custom-shaped cigarettes in varying sizes, with slim cigarettes forming a significant segment within this category. These changes in cigarette size have necessitated a series of changes in the size, material, and shape of the inner frame paper. Existing conveyor components are no longer able to meet the transport stability requirements of the new inner frame paper.

[0003] The inner frame paper is cut, conveyed and positioned by using the dotted line knife to cut the inner frame paper lugs and dotted line folds, which are then cut by the upper and lower inner frame paper cutting knives. The inner frame paper is then conveyed to the top of the No. 4 wheel die box by the suction negative pressure swing arm, and then pressed into the No. 4 wheel die box by the pressure plate. The existing negative pressure swing arm adopts a two-point negative pressure positioning suction structure. Due to the change in the external dimensions of the thin inner frame paper, the inner frame paper cutting knife wears out over time, and the cutting edge has burrs. The inner frame paper is easily embedded more tightly at the flange of the cutting knife on the inner frame paper, resulting in the inner frame paper negative pressure swing arm being unable to absorb the inner frame paper. Even if it can be absorbed smoothly, it is easily affected by the unilateral backward force, causing the inner frame paper to become skewed, so that the inner frame paper cannot be smoothly positioned in the No. 4 wheel die box, causing the inner frame paper to fly out. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a negative pressure swing arm for positioning and conveying inner frame paper, which can increase the negative pressure suction force and improve the stability of positioning and conveying inner frame paper, so as to overcome the above-mentioned defects of the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a negative pressure swing arm for positioning and conveying inner frame paper, comprising a swing arm hollow tube with an axially vent hole opened inside and two swing arm supports arranged on the swing arm hollow tube at intervals along the axial direction of the swing arm hollow tube, the swing arm support having an adsorption surface for adsorbing the inner frame paper, a first negative pressure hole and a second negative pressure hole are opened inside the swing arm support, one end of which is connected to the vent hole and the other end of which passes through the adsorption surface, the first negative pressure hole and the second negative pressure hole are respectively located at both ends of the adsorption surface along the direction perpendicular to the axial direction of the swing arm hollow tube.

[0006] Preferably, the axial plane perpendicular to the adsorption surface where the axis of the vent hole is located is located between the first negative pressure hole and the second negative pressure hole.

[0007] Preferably, the axes of the first negative pressure hole and the second negative pressure hole both form acute angles with the axial plane.

[0008] Preferably, the angle between the first negative pressure hole and the axial surface is 9°-13°, and the angle between the second negative pressure hole and the axial surface is 21°-25°.

[0009] Preferably, the diameter of the first negative pressure hole and / or the second negative pressure hole is 3 mm-4 mm.

[0010] Preferably, one end of the adsorption surface extends obliquely toward the direction close to the hollow tube of the swing arm to form an inclined surface.

[0011] Preferably, the inclination angle of the inclined surface relative to the adsorption surface is 13°-17°.

[0012] Preferably, the swing arm support is externally mounted on the swing arm hollow tube and is interference fit with the swing arm hollow tube.

[0013] Preferably, the swing arm support is bonded to the swing arm hollow tube.

[0014] Compared with the prior art, the present invention has significant improvements:

[0015] The negative pressure swing arm for positioning and conveying inner frame paper of the present invention is provided with two swing arm supports on the hollow tube of the swing arm, and two negative pressure holes (a first negative pressure hole and a second negative pressure hole) are provided on a single swing arm support, and the two negative pressure holes are respectively located at the two ends of the adsorption surface on the adsorption surface of the swing arm support in a direction perpendicular to the axial direction of the hollow tube of the swing arm. Therefore, the four corners of the inner frame paper can be sucked respectively by the four negative pressure holes of the two swing arm supports. The four negative pressure holes constitute a suction surface, which can greatly increase the negative pressure suction force and the picking capacity of the inner frame paper, improve the stability of the positioning and conveying of the inner frame paper, ensure that the inner frame paper can be smoothly sucked, and avoid the problem of inner frame paper tilting and dragging caused by the two-point negative pressure positioning suction structure adopted by the negative pressure swing arm in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a negative pressure swing arm for positioning and conveying inner frame paper according to an embodiment of the present invention.

[0017] Figure 2 It is a schematic front view of a negative pressure swing arm for positioning and conveying inner frame paper according to an embodiment of the present invention.

[0018] Figure 3 yes Figure 2 Schematic cross-sectional view along the FF direction.

[0019] Figure 4 It is a left side schematic diagram of a negative pressure swing arm for positioning and conveying inner frame paper according to an embodiment of the present invention.

[0020] The description of the accompanying drawings is as follows:

[0021] 1 Swing arm hollow tube

[0022] 10 vents

[0023] 101 Axis surface

[0024] 2 Swing arm support

[0025] 20 Adsorption surface

[0026] 201 Inclined Surface

[0027] 21 First negative pressure hole

[0028] 22 Second negative pressure hole DETAILED DESCRIPTION

[0029] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0033] like Figures 1 to 4 As shown, an embodiment of the negative pressure swing arm for positioning and conveying inner frame paper of the present invention.

[0034] See also Figure 1 、 Figure 2 and Figure 3The negative pressure swing arm for positioning and conveying inner frame paper in this embodiment includes a swing arm hollow tube 1 and a swing arm support 2. An air vent 10 is axially defined within the swing arm hollow tube 1. Two swing arm supports 2 are provided, spaced apart along the axial direction of the swing arm hollow tube 1. The swing arm support 2 has a suction surface 20 for sucking the inner frame paper, which is the working surface of the swing arm support 2. A first negative pressure hole 21 and a second negative pressure hole 22 are defined within the swing arm support 2. One end of the first negative pressure hole 21 is connected to the air vent 10 of the swing arm hollow tube 1, and the other end of the first negative pressure hole 21 passes through the suction surface 20. One end of the second negative pressure hole 22 is connected to the air vent 10 of the swing arm hollow tube 1, and the other end of the second negative pressure hole 22 passes through the suction surface 20. The first negative pressure hole 21 and the second negative pressure hole 22 are located at opposite ends of the suction surface 20 along a direction perpendicular to the axial direction of the swing arm hollow tube 1. When in use, the adsorption surface 20 of the swing arm support 2 is located above the inner frame paper to be positioned and transported and is opposite to the upper surface of the inner frame paper. By pumping air into the vent hole 10 of the swing arm hollow tube 1, the first negative pressure hole 21 and the second negative pressure hole 22 in the swing arm support 2 connected to the vent hole 10 can form a negative pressure suction force to absorb the inner frame paper, so that the inner frame paper is adsorbed on the adsorption surface 20 of the swing arm support 2, so that the inner frame paper can be positioned and transported by the negative pressure swing arm.

[0035] The negative pressure swing arm for positioning and conveying the inner frame paper in this embodiment is provided with two swing arm supports 2 on the swing arm hollow tube 1, and two negative pressure holes (a first negative pressure hole 21 and a second negative pressure hole 22) are provided on a single swing arm support 2, and the two negative pressure holes are respectively located at the two ends of the adsorption surface 20 on the adsorption surface 20 of the swing arm support 2 along a direction perpendicular to the axial direction of the swing arm hollow tube 1. Therefore, a total of four negative pressure holes of the two swing arm supports 2 can be used to suck the four corners of the inner frame paper respectively. The four negative pressure holes constitute a suction surface, which can greatly increase the negative pressure suction force and the picking capacity of the inner frame paper, improve the stability of the inner frame paper positioning and conveying, ensure that the inner frame paper can be smoothly sucked, and avoid the problem of inner frame paper tilting and dragging caused by the two-point negative pressure positioning suction structure adopted by the negative pressure swing arm in the prior art.

[0036] See also Figure 3 In this embodiment, preferably, the axis of the vent hole 10 of the swing arm hollow tube 1, on which the axial plane 101 perpendicular to the adsorption surface 20 of the swing arm support 2 is located, is located between the first negative pressure hole 21 and the second negative pressure hole 22. That is, the first negative pressure hole 21 and the second negative pressure hole 22 are respectively located on either side of the axis of the vent hole 10. This facilitates uniform air extraction from the first negative pressure hole 21 and the second negative pressure hole 22 when air is pumped into the vent hole 10 of the swing arm hollow tube 1, thereby forming a relatively equal negative pressure suction force.

[0037] In this embodiment, preferably, the axes of the first negative pressure hole 21 and the second negative pressure hole 22 are both at an acute angle to the axial surface 101 of the vent hole 10, see Figure 3The axis of the first negative pressure hole 21 forms an acute angle α with the axial surface 101, and the axis of the second negative pressure hole 22 forms an acute angle β with the axial surface 101. This allows the distance between the first negative pressure hole 21 and the second negative pressure hole 22 to gradually increase from the vent 10 to the suction surface 20, which helps reduce negative pressure loss and expand the range of negative pressure suction. In this embodiment, the axes of the first negative pressure hole 21 and the second negative pressure hole 22 both intersect with the axis of the vent 10.

[0038] Preferably, the angle α between the first negative pressure hole 21 and the axial surface 101 is 9°-13°, preferably 11°; the angle β between the second negative pressure hole 22 and the axial surface 101 is 21°-25°, preferably 23°.

[0039] In this embodiment, preferably, the diameter of the first negative pressure hole 21 and / or the second negative pressure hole 22 is 3 mm to 4 mm. Preferably, the diameter of the first negative pressure hole 21 and the second negative pressure hole 22 is the same, both set to 3 mm to 4 mm, preferably 3.5 mm.

[0040] See also Figure 3 and Figure 4 In this embodiment, preferably, the swing arm support 2 is roughly rectangular in shape, the center of which coincides with the axial surface 101 of the vent hole 10 of the swing arm hollow tube 1, and an outward extension portion is formed on one side of the second negative pressure hole 22 provided at one end of the swing arm support 2 close to the adsorption surface 20. Thus, it can meet the requirements of the first negative pressure hole 21 and the second negative pressure hole 22 forming an angle α (such as 11°) and an angle β (such as 23°) with the axial surface 101 on both sides of the axis of the vent hole 10, as well as the diameter size requirements of the first negative pressure hole 21 and the second negative pressure hole 22, and can also minimize the external volume of the swing arm support 2 to lightweight the swing arm support 2, thereby reducing the damage of the inertia to the mechanical rotating parts.

[0041] See also Figure 4 In this embodiment, preferably, one end of the suction surface 20 of the swing arm support 2, where the first negative pressure hole 21 is located, extends obliquely toward the swing arm hollow tube 1 to form an inclined surface 201. This inclined surface 201 facilitates smooth entry of the inner frame paper beneath the suction surface 20 of the swing arm support 2. Preferably, the inclination angle γ of the inclined surface 201 relative to the suction surface 20 is 13°-17°, preferably 15°.

[0042] In this embodiment, the swing arm support 2 is preferably disposed on the swing arm hollow tube 1 and is interference fit with the swing arm hollow tube 1. Preferably, the swing arm support 2 and the swing arm hollow tube 1 are also bonded. This ensures the stability of the connection between the swing arm support 2 and the swing arm hollow tube 1, while also ensuring the tightness of the connection between the swing arm support 2 and the swing arm hollow tube 1, thereby preventing air from leaking from the connection surface between the swing arm support 2 and the swing arm hollow tube 1 when air is drawn into the vent hole 10 of the swing arm hollow tube 1, thereby damaging the negative pressure suction of the first negative pressure hole 21 and the second negative pressure hole 22.

[0043] In this embodiment, the swing arm support 2 and the swing arm hollow tube 1 are both made of 45 steel.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A negative pressure swing arm for positioning and conveying inner frame paper, characterized in that: The invention comprises a swing arm hollow tube (1) with an air vent (10) opened in the axial direction thereof and two swing arm supports (2) arranged on the swing arm hollow tube (1) at intervals along the axial direction thereof, wherein the swing arm support (2) has an adsorption surface (20) for adsorbing inner frame paper, and the swing arm support (2) has a first negative pressure hole (21) and a second negative pressure hole (22) opened in the interior thereof, one end of which is connected to the air vent (10) and the other end of which is passed through the adsorption surface (20), wherein the first negative pressure hole (21) is connected to the adsorption surface (20) and the second negative pressure hole (22) is passed through the adsorption surface (20) and ... 1) and the second negative pressure hole (22) are respectively located at the two ends of the adsorption surface (20) along a direction perpendicular to the axial direction of the swing arm hollow tube (1) on the adsorption surface (20), and an axial plane (101) perpendicular to the adsorption surface (20) where the axis of the vent hole (10) is located is located between the first negative pressure hole (21) and the second negative pressure hole (22), and the axes of the first negative pressure hole (21) and the second negative pressure hole (22) both form an acute angle with the axial plane (101).

2. The negative pressure swing arm for positioning and conveying inner frame paper according to claim 1, characterized in that: The included angle between the first negative pressure hole (21) and the axial surface (101) is 9°-13°, and the included angle between the second negative pressure hole (22) and the axial surface (101) is 21°-25°.

3. The negative pressure swing arm for positioning and conveying inner frame paper according to claim 1, characterized in that: The diameter of the first negative pressure hole (21) and / or the second negative pressure hole (22) is 3 mm to 4 mm.

4. The negative pressure swing arm for positioning and conveying inner frame paper according to claim 1, characterized in that: One end of the adsorption surface (20) extends obliquely toward the direction approaching the swing arm hollow tube (1) to form an inclined surface (201).

5. The negative pressure swing arm for positioning and conveying inner frame paper according to claim 4, characterized in that: The inclined surface (201) has an inclination angle of 13°-17° relative to the adsorption surface (20).

6. The negative pressure swing arm for positioning and conveying inner frame paper according to claim 1, characterized in that: The swing arm support (2) is externally mounted on the swing arm hollow tube (1) and is interference fit with the swing arm hollow tube (1).

7. The negative pressure swing arm for positioning and conveying inner frame paper according to claim 6, characterized in that: The swing arm support (2) is bonded to the swing arm hollow tube (1).

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