A reeling and unreeling device for covering film

Abstract

The utility model discloses a retractable and rewinding device for covering film, including an expansion and contraction roller, a plurality of through grooves are provided on the surface of the expansion and contraction roller, and a movable block is slidably connected in each through groove, an adjusting rod is rotatably installed in the inner center of the expansion and contraction roller, and an adjusting block is threadedly sleeved on the outer wall of the adjusting rod, the adjusting block and each movable block are connected by a connecting rod, and the two ends of the connecting rod are respectively hinged to the adjusting block and the movable block, when the adjusting rod rotates, the adjusting block moves axially along the adjusting rod, and the movable block is controlled to slide radially along the expansion and contraction roller by the connecting rod. The utility model controls the expansion and contraction of the movable block on the surface of the expansion and contraction roller by rotating the adjusting rod, so that when the movable block extends out of the surface of the expansion and contraction roller, it is pressed against the film sleeve, so that the film sleeve and the expansion and contraction roller are more closely fitted and not easy to slip; at the same time, when the movable block retracts into the expansion and contraction roller, the film sleeve can be loosened, which is convenient for the rapid disassembly and assembly of the film sleeve, which is conducive to improving work efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of covering film production, in particular to a reeling and unreeling expansion and contraction device for covering film. Background Art

[0002] The covering film is a transparent film material, usually made of PET (polyethylene terephthalate), BOPP (biaxially oriented polypropylene) and other materials. After the covering film is produced, it is usually collected and packaged in rolls, which makes it easier to store and transport the covering film. This requires a winding device to roll up the laminated iron.

[0003] However, the existing winding devices usually directly put the film sleeve on the winding roller. During the winding process, the film sleeve and the winding roller are not closely fitted, and they are prone to slipping, making it impossible for the winding roller to drive the film sleeve to rotate continuously, which leads to winding failure.

[0004] To this end, we propose a reel-in and retractable device for covering film to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a device for reeling and unreeling a covering film to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for expanding and contracting a covering film for rewinding and unwinding comprises an expanding and contracting roller, a surface of the expanding and contracting roller is provided with a plurality of through grooves, and a movable block is slidably connected in each through groove, an adjusting rod is rotatably mounted on the inner center of the expanding and contracting roller, and an adjusting block is threadedly sleeved on the outer wall of the adjusting rod, the adjusting block is connected to each movable block through a connecting rod, and the two ends of the connecting rod are respectively hinged to the adjusting block and the movable block, when the adjusting rod rotates, the adjusting block moves axially along the adjusting rod, and the movable block is controlled to slide radially along the expanding and contracting roller through the connecting rod.

[0008] In a further embodiment, the through groove, the movable block and the connecting rod are all symmetrically distributed about the axis center of the expansion and contraction roller.

[0009] In a further embodiment, a pair of side retaining rings are further installed on the surface of the expansion and contraction roller, one of the side retaining rings is fixed to the surface of the expansion and contraction roller, and the other side retaining ring is threadedly connected to the surface of the expansion and contraction roller.

[0010] In a further embodiment, anti-slip pads are connected to opposite surfaces of the two side retaining rings.

[0011] In a further embodiment, the end surface of the movable block extending out of the groove is connected to an anti-slip layer.

[0012] In a further embodiment, end covers are symmetrically installed at both ends of the expansion and contraction roller, and the end covers are connected to the expansion and contraction roller by a plurality of bolts.

[0013] In a further embodiment, a circular hole for the adjusting rod to pass through is opened on the surface of one of the end covers, and one end of the adjusting rod passing through the end cover is connected to the adjusting handle, the other end of the adjusting rod is rotatably connected to the other end cover, and a connecting shaft is fixed on the outer wall of the end cover.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model controls the extension and retraction of the movable block on the surface of the expansion and contraction roller by rotating the adjusting rod, so that when the movable block extends out of the surface of the expansion and contraction roller, it can be pressed against the film sleeve, so that the film sleeve and the expansion and contraction roller are more closely fitted and not easy to slip, thereby improving the success rate of winding; at the same time, when the movable block is retracted into the expansion and contraction roller, the film sleeve can be loosened, which is convenient for quick disassembly and assembly of the film sleeve and is conducive to improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model after removing a side retaining ring;

[0018] Figure 3 This is a schematic diagram of the internal structure of the expansion and contraction roller of the utility model;

[0019] Figure 4 It is a schematic diagram of the assembly structure of the adjusting rod and the movable block of the utility model.

[0020] In the figure: 1. expansion and contraction roller; 11. through groove; 12. end cover; 13. connecting shaft; 2. movable block; 21. anti-skid layer; 3. adjusting rod; 31. adjusting handle; 4. adjusting block; 5. connecting rod; 6. side retaining ring; 61. anti-skid pad. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 The invention relates to a device for expanding and contracting a covering film by unwinding and winding. The device comprises an expanding and contracting roller 1. The surface of the expanding and contracting roller 1 is provided with a plurality of through grooves 11. A movable block 2 is slidably connected in each through groove 11. When the movable block 2 extends out of the through groove 11, it can press against the film sleeve outside the expanding and contracting roller 1. In order to conveniently control the expansion and contraction of the movable block 2, an adjusting rod 3 is arranged to be rotatably installed in the inner center of the expanding and contracting roller 1. An adjusting block 4 is threadedly sleeved on the outer wall of the adjusting rod 3, so that when the adjusting rod 3 rotates, the adjusting block 4 can move axially along the adjusting rod 3. The adjusting block 4 is connected to each movable block 2 by a connecting rod 5. The two ends of the connecting rod 5 are respectively hinged to the adjusting block 4 and the movable block 2. When the adjusting rod 3 rotates, the adjusting block 4 moves axially along the adjusting rod 3, and controls the movable block 2 to slide radially along the expanding and contracting roller 1 through the connecting rod 5, so as to facilitate the control of the expansion and contraction of the movable block 2.

[0025] In order to further improve the tightening effect on the membrane sleeve, the through groove 11, the movable block 2 and the connecting rod 5 are symmetrically distributed about the axis center of the expansion and contraction roller 1, so that the movable block 2 can simultaneously tighten the membrane sleeve from multiple angles on the surface of the expansion and contraction roller 1, and the firmness is better. At the same time, the end face of the movable block 2 extending out of the through groove 11 is connected with an anti-skid layer 21. The material of the anti-skid layer 21 can be rubber, which is beneficial to increase the friction when the movable block 2 contacts with the membrane sleeve, thereby improving the anti-skid effect.

[0026] Furthermore, a pair of side retaining rings 6 are installed on the surface of the expansion and contraction roller 1, one of the side retaining rings 6 is fixed to the surface of the expansion and contraction roller 1, and the other side retaining ring 6 is threadedly connected to the surface of the expansion and contraction roller 1. When the film sleeve needs to be installed, the threaded side retaining ring 6 is first unscrewed, so that the film sleeve is sleeved on the outside of the expansion and contraction roller 1, and then the threaded side retaining ring 6 is tightened so that the film sleeve is clamped between the two side retaining rings 6, which is beneficial to further prevent it from slipping. At the same time, the opposite surfaces of the two side retaining rings 6 are connected with anti-slip pads 61. The material of the anti-slip pads 61 can be rubber, which is beneficial to increase the friction when the side retaining ring 6 contacts the end of the film sleeve, thereby improving the anti-slip effect.

[0027] In order to facilitate the assembly of the entire device, end covers 12 are symmetrically installed at both ends of the expansion and contraction roller 1, and the end covers 12 are connected to the expansion and contraction roller 1 by a number of bolts, so that the end covers 12 are easy to open and the internal structure is easy to install and disassemble. A circular hole for the adjusting rod 3 to pass through is opened on the surface of one of the end covers 12, and an adjusting handle 31 is connected to one end of the adjusting rod 3 passing through the end cover 12, so that the user can operate the adjusting handle 31 to control the rotation of the adjusting rod 3. The other end of the adjusting rod 3 is rotatably connected to the other end cover 12, so as to keep the adjusting rod 3 able to rotate stably inside the expansion and contraction roller 1. A connecting shaft 13 is fixed on the outer wall of the end cover 12, so that the expansion and contraction roller 1 is connected to the driving device, so as to provide power for the expansion and contraction roller 1 to roll up the covering film.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for expanding and contracting a covering film for winding and unwinding, comprising an expanding and contracting roller (1), characterized in that: The surface of the expansion and contraction roller (1) is provided with a plurality of through grooves (11), and a movable block (2) is slidably connected in each through groove (11). An adjusting rod (3) is rotatably mounted in the center of the expansion and contraction roller (1), and an adjusting block (4) is threadedly sleeved on the outer wall of the adjusting rod (3). The adjusting block (4) and each movable block (2) are connected via a connecting rod (5), and the two ends of the connecting rod (5) are respectively hinged to the adjusting block (4) and the movable block (2). When the adjusting rod (3) rotates, the adjusting block (4) moves axially along the adjusting rod (3), and controls the movable block (2) to slide radially along the expansion and contraction roller (1) via the connecting rod (5).

2. The device for reeling and unreeling a covering film according to claim 1, characterized in that: The through groove (11), the movable block (2) and the connecting rod (5) are all symmetrically distributed about the axis centerline of the expansion and contraction roller (1).

3. The device for reeling and unreeling a covering film according to claim 1, characterized in that: A pair of side retaining rings (6) are also installed on the surface of the expansion and contraction roller (1), wherein one of the side retaining rings (6) is fixed to the surface of the expansion and contraction roller (1), and the other side retaining ring (6) is threadedly connected to the surface of the expansion and contraction roller (1).

4. The device for reeling and unreeling a covering film according to claim 3, characterized in that: The opposing surfaces of the two side retaining rings (6) are both connected with anti-slip pads (61).

5. The device for reeling and unreeling a covering film according to claim 1, characterized in that: The end surface of the movable block (2) extending out of the through groove (11) is connected to an anti-slip layer (21).

6. The device for reeling and unreeling a covering film according to claim 1, characterized in that: End covers (12) are symmetrically mounted at both ends of the expansion and contraction roller (1), and the end covers (12) and the expansion and contraction roller (1) are connected via a plurality of bolts.

7. The device for reeling and unreeling a covering film according to claim 6, characterized in that: A circular hole for the adjustment rod (3) to pass through is formed on the surface of one of the end covers (12), and one end of the adjustment rod (3) passing through the end cover (12) is connected to an adjustment handle (31), and the other end of the adjustment rod (3) is rotatably connected to the other end cover (12), and a connecting shaft (13) is fixed on the outer wall of the end cover (12).

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