Film roll locking device of straw packaging machine

Abstract

The utility model discloses a straw packaging machine film roll locking device which comprises an unwinding shaft and a locking assembly, external threads are arranged on the unwinding shaft, the locking assembly comprises a locking nut, a sliding piece and a spring, a sliding groove is formed in the locking nut, the sliding piece and the spring are installed in the sliding groove, the spring is used for supporting the sliding piece to slide in the sliding groove, and the locking assembly is connected with the locking nut. An internal thread is arranged in the center of the locking nut, a buckle is arranged on the sliding sheet, and when the locking assembly is in threaded connection to the unwinding shaft through the locking nut, the sliding sheet slides outwards, and the buckle on the sliding sheet is clamped into a threaded groove of the unwinding shaft. The film roll core locking device is simple in structure, can effectively prevent the locking nut from loosening, guarantees clamping of a film roll core, and improves packaging quality.

Description

Technical Field

[0001] The utility model relates to the technical field of straw packaging machines, in particular to a film roll locking device for straw packaging machines. Background Art

[0002] The straw packaging machine is a supporting equipment for the straw manufacturing unit. It can package the formed straws individually or in multiple pieces through film. The film roll used to package the straws is installed on the unwinding shaft and driven to rotate by the unwinding shaft. The existing film roll core is fixed on the unwinding shaft by a common locking nut. During the unwinding process, the common locking nut is easy to loosen due to slight vibration, so that the film roll will have axial stringing on the unwinding shaft, affecting the packaging quality. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a film roll locking device for a straw packaging machine.

[0004] The technical solution adopted by the utility model is:

[0005] A film roll locking device for a straw packaging machine includes a reel and a locking assembly. The reel is provided with an external thread. The locking assembly includes a locking nut, a slide and a spring. A slide groove is provided in the locking nut. The slide and the spring are installed in the slide groove. The spring is used to support the slide to slide in the slide groove. The central portion of the locking nut is provided with an internal thread. The slide is provided with a buckle. When the locking assembly is threadedly connected to the reel through the locking nut, the slide slides outward and the buckle on the slide is snapped into the threaded groove of the reel.

[0006] Furthermore, it also includes a fixed clamping nut, which is fixedly sleeved on the unwinding shaft and cooperates with the locking nut to clamp and fix the film roll core.

[0007] Furthermore, a conical portion capable of inserting the film roll core is provided on one side of the locking nut; a slide groove is provided on the other side of the locking nut, and an opening for a slide plate to slide out is provided at one end of the slide groove.

[0008] Furthermore, the locking assembly also includes a pressure cover, the shape of which is adapted to the cross-sectional shape of the locking nut; the slide groove is a rectangular groove opened on the side of the locking nut, and the slide and the spring are enclosed in the rectangular groove by the pressure cover; the two side walls of the rectangular groove protrude outward near the end where the slide slides out of the opening to form a support ear slide groove, and support ears are arranged on both sides of the slide, the support ears are slidably matched with the support ear slide groove, and a spring is connected under the support ear, and the other end of the spring is supported on the inner bottom wall of the support ear slide groove.

[0009] Furthermore, an oblong hole is provided at the center of the slide, and the inner side wall of the bottom of the oblong hole protrudes outward to form a buckle, and a pressing portion is provided at one end of the slide extending out of the slide groove.

[0010] Furthermore, the thread on the unwinding shaft is a trapezoidal thread.

[0011] The beneficial effects of the utility model are as follows: by providing a nut locking assembly with a slide and a spring, when the locking nut is threadedly connected to the unwinding shaft, the slide slides outward under the action of the spring force, and the buckle on the slide is clamped into the thread groove of the unwinding shaft, thereby realizing the locking and fixing of the locking nut. When it is necessary to remove the empty film core, the slide is pressed by hand to make the buckle withdraw from the thread groove, the locking assembly is removed, and the film core is removed; thereby solving the problem of the film roll moving caused by the loosening of the ordinary locking nut. The device has a simple structure and can effectively clamp the film core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the film roll locking device of the present application.

[0013] Figure 2 This is a schematic diagram of the locking component structure of the film roll locking device.

[0014] Figure 3 It is a schematic diagram of the locking nut structure of the locking assembly.

[0015] Figure 4 It is a schematic diagram of the sliding structure of the locking assembly.

[0016] Figure 5 It is a schematic diagram of the gland structure of the locking assembly. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and a preferred implementation manner.

[0018] See also Figure 1-Figure 5 The present application provides a film roll locking device for a straw packaging machine, comprising a reeling shaft 1, a clamping and fixing nut 3 and a locking assembly.

[0019] Both ends of the unwinding shaft 3 are provided with external threads, preferably the external threads are trapezoidal threads, which are convenient for the buckle insertion of the slide 20. The clamping and fixing nut 3 is threadedly mounted on one end of the unwinding shaft 3, and the locking assembly is threadedly mounted on the other end of the unwinding shaft. The clamping and fixing nut 3 and the locking assembly jointly clamp the winding core of the film roll 2.

[0020] The locking assembly includes a locking nut 10, a slide 20, a gland 40 and a spring 30. The locking nut 10 includes a nut body 11, one end of the nut body 11 is cylindrical, and the other end is conical, and the size of the conical end is adapted to the film roll core. Preferably, the shape of the clamping and fixing nut is consistent with the locking nut of the locking assembly, and they are symmetrically arranged to facilitate clamping the roll core.

[0021] In this embodiment, a through hole 13 is provided at the center of the nut body 11, and an internal thread matching the external thread of the unwinding shaft 3 is provided on the inner circumferential surface of the through hole 13. An axial section is provided at one end of the cylindrical portion of the nut body 11 to facilitate the assembly of the slide 20, and three arc grooves are evenly provided on the outer arc surface of the remaining portion to facilitate the manual disassembly of the locking nut. A rectangular groove 121 is provided on the side of the cylindrical portion away from the conical portion, and one end of the rectangular groove 121 passes through the axial section. Three threaded holes 14 are provided on the outside of the rectangular groove 12 for connecting the gland 40. The shape of the gland 40 is consistent with the cross-section of the cylindrical portion of the nut body 11 without the slide groove, that is, a central through hole 41 is provided at the center of the gland 40, and the radius of the central through hole 41 is larger than the central through hole 13 of the nut body 11 to avoid interference with the connection between the locking nut and the unwinding shaft; and light holes 42 matching the threaded holes 14 are provided on the outside of the central through hole 41 in a one-to-one correspondence. The pressure cover 40 is connected to the nut body 11 by a bolt passing through its light hole 42. The rectangular groove 12 is closed by the pressure cover 20 to form a slide groove. The rectangular groove 12 passes through one end of the axial section to form an opening for the slide to slide out. The two side walls of the rectangular groove 12 at one end close to the axial section protrude outward to form a lug slide groove 121. The front side wall of the slide lug 121 is used to hold the slide 20 to prevent the slide from sliding out, and the bottom wall is used to abut the spring 30. The open rectangular groove 12 and pressure cover 20 are provided to facilitate the installation and removal of the slide 20 and the spring 30, making the structure of the device simpler.

[0022] The slide 20 includes a slide body 21, the shape of which is adapted to the rectangular groove 12, that is, the slide body 21 is rectangular, and the front ends of its two side walls protrude outward to form slide ears 22 adapted to the ear slide groove 121. The center of the slide body 21 is provided with an oblong through hole 23, which is formed by connecting two semicircular holes and a rectangular hole. The radius of the semicircular hole is consistent with the radius of the center hole of the gland. The inner side wall of the bottom of the oblong through hole 23 protrudes radially outward to form a buckle 24, and the thickness of the buckle 24 is adapted to the width of the thread groove of the unwinding shaft 3. A pressing portion 25 is provided at one end of the slide body 21 extending out of the slide groove. The pressing portion 25 can be formed by bending the center of the front side wall of the slide body 21 protruding outward, and the setting of the pressing portion 25 is conducive to manual pressing operation.

[0023] The slide 20 and the spring 30 are installed in the slide groove 13 of the locking nut 20, the pressing portion 25 of the slide 20 is located outside the slide groove 13, the lug 22 is located in the lug slide groove 121, the lower part of the lug 22 is connected to the spring 30, one end of the spring 30 is against the bottom of the lug 22, and the other end is supported on the inner bottom wall of the lug slide groove 121. The spring 30 is a helical compression spring.

[0024] When the utility model is used:

[0025] First, fix the clamping nut 3 on one end of the unwinding shaft 1, then pass the film roll 2 on the unwinding shaft 1, and insert one end of the core of the film roll 2 into the conical end of the clamping nut 3; then manually press the slide 20 to make the locking nut 10 threadedly connected to the unwinding shaft 1, and insert the conical end of the locking nut 10 into the other end of the core of the film roll 2, clamp the core of the film roll 2, and then release the slide 20, the slide 20 slides outward under the action of the spring force, and the buckle 24 on the slide is snapped into the threaded groove of the unwinding shaft 1.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. A film roll locking device for a straw packaging machine, characterized in that: It includes a reel and a locking assembly. The reel is provided with an external thread. The locking assembly includes a locking nut, a slide and a spring. A slide groove is provided in the locking nut. The slide and the spring are installed in the slide groove. The spring is used to support the slide to slide in the slide groove. An internal thread is provided at the center of the locking nut. A buckle is provided on the slide. When the locking assembly is threadedly connected to the reel through the locking nut, the slide slides outward and the buckle on the slide is snapped into the threaded groove of the reel.

2. According to claim 1, a film roll locking device for a straw packaging machine is characterized in that: It also includes a fixed clamping nut, which is fixedly sleeved on the unwinding shaft and cooperates with the locking nut to clamp and fix the film roll core.

3. The film roll locking device for a straw packaging machine according to claim 1, characterized in that: A conical portion capable of inserting a film roll core is provided on one side of the locking nut; a sliding groove is provided on the other side of the locking nut, and an opening for a sliding plate to slide out is provided at one end of the sliding groove.

4. A film roll locking device for a straw packaging machine according to claim 3, characterized in that: The locking assembly also includes a pressure cover, the shape of which is adapted to the cross-sectional shape of the locking nut; the slide groove is a rectangular groove opened on the side of the locking nut, and the slide and the spring are enclosed in the rectangular groove through the pressure cover; the two side walls of the rectangular groove protrude outward near the end where the slide slides out of the opening to form a support ear slide groove, and support ears are arranged on both sides of the slide, the support ears are slidably matched with the support ear slide groove, and a spring is connected under the support ears, and the other end of the spring is supported on the inner bottom wall of the support ear slide groove.

5. The film roll locking device for a straw packaging machine according to claim 1, characterized in that: An oblong hole is arranged at the center of the slide, the inner side wall at the bottom of the oblong hole protrudes outwards to form a buckle, and a pressing part is arranged at one end of the slide extending out of the slide slot.

6. The film roll locking device for a straw packaging machine according to claim 1, characterized in that: The thread on the unwinding shaft is a trapezoidal thread.

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