Flat belt elastic tensioning mechanism

Abstract

The utility model provides a flat belt elastic tensioning mechanism which comprises a fixing support, a limiting support, a tensioning shaft, a tensioning belt roller, a conveying shaft, a conveying belt roller, a spring, a screw rod, a nut and a flat belt, the fixing support is composed of two parallel fixing plates, the two fixing plates are respectively provided with corresponding sliding grooves, the tensioning shaft penetrates through the sliding grooves of the two fixing plates, and the limiting support is arranged on the limiting support. A tensioning belt roller is installed on the tensioning shaft, the two ends of the tensioning shaft are connected with one ends of springs respectively, the other ends of the springs are connected with screws, the screws penetrate through limiting supports to be connected with nuts, the limiting supports are fixed to the fixing supports, the conveying shaft is installed between the two fixing plates, and a conveying belt roller is installed on the conveying shaft. By means of the structural arrangement of the spring, the screw rod, the nut, the limiting support and the tensioning shaft, the tensioning force of the flat belt can be simply and conveniently adjusted.

Description

Technical Field

[0001] The utility model belongs to the field of printing and packaging machinery, and in particular relates to a flat belt elastic tensioning mechanism in a paper feeder (feeder). Background Art

[0002] The paper feeder is a commonly used feeding part of sheet-fed printing and packaging equipment (such as offset printing machines, laminating machines, etc.). Its function is to accurately separate the top sheet of paper from the paper pile and transport it to the next station. The paper feeder has a part called a paper feeder table, which is a special flat belt conveying workbench used to transport paper to a specified location. In the past, the flat belt was tensioned with a fixed tension. Long-term use will cause the flat belt to grow, and changes in temperature and humidity will also affect the length of the flat belt, causing it to be too loose or too tight, thus causing the flat belt to deviate. Therefore, the market urgently needs a paper feeder table that can automatically adjust the tension of the flat belt. Summary of the invention

[0003] In order to solve the above technical problems, the utility model provides a flat belt elastic tensioning mechanism, which adopts the following technical solutions:

[0004] The lifting of the ...

[0005] Furthermore, in order to improve the stability of the two fixed plates, a first support rod and a second support rod can also be set. The first support rod can be installed close to the limiting bracket, and the second support rod is spaced one end away from the first support rod and installed close to the tensioning shaft end.

[0006] The flat belt elastic tensioning mechanism of the utility model, when in use, by rotating the nut, after the nut is limited by the limiting bracket, it can drive the screw rod to move inwards, the screw rod drives one end of the spring to move inwards, the spring is stretched, the inward pulling force of the other end of the spring becomes larger, and the tensioning shaft is driven to move inwards along the sliding groove on the fixed plate, thereby driving the tensioning belt roller to move inwards, thereby tensioning the flat belt, and when the length of the flat belt changes, it can be released by the spring, thereby ensuring a constant tensioning force.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] In the utility model, the tensioning force of the flat belt can be adjusted relatively simply and conveniently by mainly utilizing the structural arrangement among the spring, the screw rod, the nut, the limit bracket and the tensioning shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 It is a three-dimensional diagram of a flat belt elastic tensioning mechanism of the utility model;

[0011] Figure 2 This is a structural relationship diagram of a tensioning belt roller, a conveyor belt roller and a flat belt of a flat belt elastic tensioning mechanism of the utility model;

[0012] Figure 3 It is a top view of a flat belt elastic tensioning mechanism of the utility model;

[0013] Figure 4 The utility model is a schematic diagram of a flat belt elastic tensioning mechanism.

[0014] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0015] 1. Flat belt, 2. Tension belt roller, 3. Tension shaft, 4. Spring, 5. Screw rod, 6. Nut, 7. Limit bracket, 8. Conveyor shaft, 9. Conveyor belt roller, 10. First support rod, 11. Second support rod, 12. Slide groove. DETAILED DESCRIPTION

[0016] 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 of 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.

[0017] like Figure 1 , Figure 2 and Figure 3As shown, a flat belt elastic tensioning mechanism of the present embodiment comprises a limit bracket 7, a tensioning shaft 3, a tensioning belt roller 2, a conveying shaft 8, a conveying belt roller 9, a spring 4, a screw 5, a nut 6, a flat belt 1 and a fixed bracket, wherein the fixed bracket is composed of two parallel fixed plates, and the two fixed plates are respectively provided with corresponding slide grooves 12, the tensioning shaft 3 passes through the slide grooves 12 of the two fixed plates and can slide in the slide grooves 12, and the tensioning belt roller 2 is installed on the tensioning shaft 3 through bearings between the two fixed plates, and a spring 4 is respectively provided on the outer sides of the two fixed plates, and the two ends of the tensioning shaft 3 are respectively connected to one end of the spring 4 on both sides, and the other end of the spring 4 on both sides is respectively connected to a screw 5, and each screw 5 passes through the limit bracket 7 is connected to its corresponding nut 6, the limit bracket 7 is fixed on the two parallel fixed plates of the fixed bracket, and two through holes are provided on both sides of the fixed bracket to ensure that the screw 5 passes through but the nut 6 does not pass through. The conveying shaft 8 is installed between the two fixed plates, and the conveyor belt roller 9 is installed thereon. The flat belt 1 enters from one side along the tensioning belt roller 2, and moves along the conveyor belt roller 9 when it comes out from the other side. In addition, in order to improve the overall stability of the two fixed plates of the fixed bracket, the first support rod and the second support rod 11 are installed on the two fixed plates. In order to disperse the supporting force, the first support rod can be installed close to the limit bracket 7, and the second support rod 11 is installed at a distance from it at one end and close to the side of the tensioning shaft 3.

[0018] like Figure 4 As shown, the elastic tensioning mechanism of the flat belt 1 of this embodiment, when in use, by rotating the nut 6, after the nut 6 is limited by the limiting bracket 7, it can drive the screw rod 5 to move inward, and the screw rod 5 drives one end of the spring 4 to move inward, the spring 4 is elongated, and the inward pulling force of the other end of the spring 4 becomes larger, driving the tensioning shaft 3 to move inward along the slide groove 12 on the fixed plate, thereby driving the tensioning belt roller 2 to move inward, thereby tensioning the flat belt 1, when the length of the flat belt 1 changes, it can be released by the spring 4, thereby ensuring a constant tensioning force.

[0019] 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.

[0020] 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 flat belt elastic tensioning mechanism, characterized in that: It includes a fixed bracket, a limiting bracket, a tensioning shaft, a tensioning belt roller, a conveying shaft, a conveying belt roller, a spring, a screw, a nut and a flat belt. The fixed bracket is composed of two parallel fixed plates, and the two fixed plates are respectively provided with corresponding sliding grooves. The tensioning shaft passes through the sliding grooves of the two fixed plates, and the tensioning belt roller is installed thereon. The two ends of the tensioning shaft are respectively connected to one end of the spring, and the other end of the spring is connected to the screw. The screw passes through the limiting bracket and is connected to the nut. The limiting bracket is fixed on the fixed bracket, and the conveying shaft is installed between the two fixed plates, and the conveying belt roller is installed thereon. The flat belt moves around the tensioning belt roller and the conveying belt roller.

2. A flat belt elastic tensioning mechanism according to claim 1, characterized in that: A first support rod and a second support rod are installed between the two fixing plates.

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