Film traction and stretching mechanism

Abstract

The utility model discloses a thin film traction and stretching mechanism, and relates to the technical field of thin film performance detection. A motor is installed on one side of the base, the output end of the motor is connected with a supporting column through a lead screw, the front face of the supporting column is connected with a connecting column, the outer surface of the connecting column is connected with a traction roller, a sliding groove is formed in the connecting column, a second spring is connected in the sliding groove, the two ends of the second spring are connected with clamping blocks, and the bottoms of the clamping blocks are connected with limiting blocks. Through the cooperation of the clamping blocks on the connecting columns and the clamping grooves of the traction roller and the slope-shaped design of the clamping blocks, during installation, only the connecting columns need to be inserted into the square holes of the traction roller, the clamping blocks are automatically compressed to enter the sliding grooves under the guidance of the slopes, and the clamping blocks can pop out to be clamped into the clamping grooves under the action of the springs after being inserted in place, so that rapid fixing is achieved; the clamping block can be pulled into the sliding groove by rotating the hand wheel to pull the connecting rope, and the traction roller is easily taken down.

Description

Technical Field

[0001] The utility model belongs to the technical field of film performance detection, and in particular relates to a film traction and stretching mechanism. Background Art

[0002] The tensile test of plastic films is an important indicator for characterizing their tensile properties. In particular, the tensile properties of food packaging films directly affect the safety of their packaging contents. The accuracy of the test results of the film tensile test not only affects the evaluation of material properties and the adjustment of production processes, but is also closely related to whether the product is qualified or not. How to ensure the accuracy of the test results is a common focus of quality inspection agencies and corporate laboratories. At present, the fixing devices used in film tensile tests are mainly toothed clamps configured by various manufacturers. In specific implementation, the toothed clamps fix the two ends of the film spline. During the stretching process, the toothed clamps are likely to cause unevenness on the film surface, resulting in uneven clamping force. In the subsequent tensile test process, the forces applied to different parts of the film are significantly different, seriously affecting the accuracy of the tensile test.

[0003] The Chinese patent publication number CN214373796U discloses a traction mechanism for film tensile testing. When in use, the film to be tested can be fixedly wound on the film rolling roller by cooperating with the film clamping block and the film rolling roller. At the same time, since the film is wound on the film rolling roller, when subjected to force, the force is evenly applied to all parts of the film, and the test results are accurate. A square shaft is set to cooperate with the film rolling roller to prevent the film rolling roller from rotating during stretching, thereby preventing the film from being subjected to forces in other directions during stretching. At the same time, the traction block and the traction base are connected by a slide rail, which further improves the accuracy of the test results. However, the technical solution clearly states in the specification that a screw is fixedly connected to the end of the square shaft, and a nut is connected to the external thread of the screw. The film rolling roller can be laterally limited by the limit nut to prevent the film rolling roller from moving. This method requires repeated rotation of the limit nut to fix and remove the film during use, which is more troublesome and affects the test efficiency.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a film traction and stretching mechanism to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A film traction and stretching mechanism includes: a base, a motor is installed on one side of the base, the output end of the motor is connected to a support column through a screw rod, the front of the support column is connected to a connecting column, the outer surface of the connecting column is connected to a traction roller, a slide groove is provided inside the connecting column, a second spring is connected inside the slide groove, both ends of the second spring are connected to a clamping block, the bottom of the clamping block is connected to a limiting block, a connecting shaft passes through the connecting column, the outer surface of the connecting shaft is connected to a connecting rope, one end of the connecting shaft is connected to a handwheel, and the outer surface of the connecting column is sleeved with a first spring.

[0008] Optionally, a pressing groove is provided on the outer surface of the traction roller, a pressing block is connected to the inside of the pressing groove, and the pressing block is adapted to the pressing groove, and a clamping groove is provided inside the traction roller.

[0009] Optionally, the top and bottom of the card block are both sloped, and the card block is adapted to the card slot.

[0010] Optionally, four second springs are provided, and the four second springs are distributed in a rectangular array.

[0011] Optionally, a square hole is opened inside the traction roller, and the square hole is adapted to the connecting column.

[0012] Optionally, a threaded block is connected to the bottom of the support column, and the threaded block is threadedly connected to the screw rod.

[0013] Optionally, the first spring is fixedly connected to the support column, and the first spring abuts against the traction roller.

[0014] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described below at the same time:

[0015] Through the coordination of the card block on the connecting column and the card slot of the traction roller, as well as the sloped design of the card block, during installation, it is only necessary to insert the connecting column into the square hole of the traction roller. The card block is automatically compressed into the slide groove under the guidance of the slope. After being inserted into place, it can pop out and be stuck in the slot under the action of the spring to achieve quick fixation. When disassembling, turn the hand wheel and pull the connecting rope to pull the card block into the slide groove, and easily remove the traction roller without the use of complex tools and tedious operations, which greatly improves the maintenance and replacement efficiency of the equipment.

[0016] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] In the picture:

[0019] Figure 1 It is a schematic diagram of the overall structure;

[0020] Figure 2 Schematic diagram of the cross-sectional structure of the traction roller;

[0021] Figure 3 Schematic diagram of the cross-section structure of the connecting column;

[0022] Figure 4 for Figure 3 A in the figure is an enlarged structural diagram.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Base; 2. Motor; 3. Screw; 4. Support column; 5. Connecting column; 6. Handwheel; 7. First spring; 8. Traction roller; 9. Pressure block; 10. Clamping block; 11. Second spring; 12. Connecting shaft; 13. Connecting rope.

[0025] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] See also Figure 1-4 As shown, in this embodiment, a film traction and stretching mechanism is provided, including: a base 1, a motor 2 is installed on one side of the base 1, the output end of the motor 2 is connected to the support column 4 through a screw rod 3, the front of the support column 4 is connected to a connecting column 5, the outer surface of the connecting column 5 is connected to a traction roller 8, a slide groove is provided inside the connecting column 5, a second spring 11 is connected inside the slide groove, both ends of the second spring 11 are connected to a clamping block 10, the bottom of the clamping block 10 is connected to a limiting block, a connecting shaft 12 passes through the inside of the connecting column 5, a connecting rope 13 is connected to the outer surface of the connecting shaft 12, one end of the connecting shaft 12 is connected to a handwheel 6, and a first spring 7 is sleeved on the outer surface of the connecting column 5.

[0028] The film traction and stretching mechanism is mainly composed of a base 1, a motor 2, a screw 3, a support column 4, a connecting column 5, a traction roller 8 and other parts. The base 1 serves as the basic supporting component of the entire mechanism and provides a stable installation position for other components. The motor 2 is installed on one side of the base 1 and is connected to the support column 4 through the screw 3 at the output end, which can drive the support column 4 to move in a specific direction. The connecting column 5 connected to the front of the support column 4 is used to install the traction roller 8 to achieve the traction and stretching effect on the film. The sliding groove opened inside the connecting column 5 is the installation position of the block 10 and the second spring 11. The two ends of the second spring 11 are connected Under the action of the second spring 11, the card block 10 enters the inside of the card slot, thereby achieving the effect of limiting the traction roller 8, thereby replacing the limit nut. The limit block at the bottom of the card block 10 limits the moving range of the card block 10 to prevent the card block 10 from leaving the slide slot. The outer surface of the connecting shaft 12 passing through the inside of the connecting column 5 is connected to the connecting rope 13. The handwheel 6 at one end of the connecting shaft 12 can be used to manually operate the connecting shaft 12. By rotating the handwheel 6, the connecting rope 13 can be pulled to realize the function of pulling the card block 10 into the slide slot. The first spring 7 sleeved on the outer surface of the connecting column 5 can directly pop out the traction roller 8.

[0029] In this embodiment, a pressure groove is provided on the outer surface of the traction roller 8, and a pressure block 9 is connected to the inside of the pressure groove, and the pressure block 9 is adapted to the pressure groove. A card slot is provided inside the traction roller 8, and the top and bottom of the card block 10 are sloped, and the card block 10 is adapted to the card slot. Four second springs 11 are provided, and the four second springs 11 are distributed in a rectangular array. A square hole is provided inside the traction roller 8, and the square hole is adapted to the connecting column 5. A threaded block is connected to the bottom of the support column 4, and the threaded block is threadedly connected to the screw rod 3. The first spring 7 is fixedly connected to the support column 4, and the first spring 7 is in contact with the traction roller 8.

[0030] The pressing groove on the outer surface of the traction roller 8 is used to install the pressing block 9. The pressing block 9 is adapted to the pressing groove to ensure that the pressing block 9 can be stably installed in the pressing groove. The combination of the pressing block 9 and the pressing groove may be used to increase the friction when traction film or perform a specific extrusion operation on the film to better achieve the traction and stretching of the film. The top and bottom of the card block 10 are both sloped. This design makes it easier to insert the connecting column 5 into the square hole of the traction roller 8 when installing the traction roller 8. The card block 10 is compressed into the slide groove under the guidance of the slope. When the connecting column 5 is fully inserted into the square hole, the card block 10 is pressed against the second spring 1 1 pops up and snaps into the slot under the action of the traction roller 8, realizing the fixed installation of the traction roller 8. The square hole inside the traction roller 8 is adapted to the connecting column 5, ensuring that the connecting column 5 can be accurately inserted into the traction roller 8, providing a basis for the installation of the traction roller 8. When the motor 2 drives the screw rod 3 to rotate, the threaded block will move along the screw rod 3, thereby driving the support column 4 to move accordingly. There are four second springs 11, and they are distributed in a rectangular array. Such a distribution method can make the card block 10 receive uniform elastic force in all directions, ensuring that the card block 10 can be stably stuck in the slot, thereby improving the firmness of the installation of the traction roller 8.

[0031] Working principle:

[0032] When the motor 2 is started, the output end of the motor 2 drives the screw 3 to rotate. Since the threaded block at the bottom of the support column 4 is threadedly connected to the screw 3, the rotation of the screw 3 causes the threaded block to move along the screw 3 in a specific direction, thereby driving the support column 4 to move. The connecting column 5 connected to the front of the support column 4 and the traction roller 8 connected to the outer surface of the connecting column 5 also move accordingly, realizing the traction and stretching operation of the film;

[0033] When installing the traction roller 8, the traction roller 8 is inserted into the square hole inside the connecting column 5. Since the top and bottom of the clamping block 10 are both sloped, during the insertion process, the connecting column 5 contacts the edge of the square hole of the traction roller 8 and squeezes the slope surface of the clamping block 10, causing the clamping block 10 to compress the second spring 11 and enter the slide groove. When the connecting column 5 is fully inserted into the square hole, the clamping block 10 pops out under the elastic force of the second spring 11 and is clamped into the clamping groove inside the traction roller 8, thereby achieving fixed installation of the traction roller 8. The four second springs 11 distributed in a rectangular array can ensure that the clamping block 10 is subjected to uniform elastic force in all directions, thereby improving the firmness of the installation of the traction roller 8.

[0034] When the traction roller 8 needs to be removed, the handwheel 6 at one end of the connecting shaft 12 is manually rotated. The handwheel 6 drives the connecting shaft 12 to rotate, and the connecting rope 13 connected to the outer surface of the connecting shaft 12 is pulled. The tension of the connecting rope 13 acts on the clamping block 10, so that the clamping block 10 overcomes the elastic force of the second spring 11 and is pulled into the chute. At this time, the traction roller 8 can be easily removed from the connecting column 5.

[0035] During the process of pulling the film, the pressure grooves and pressure blocks 9 on the outer surface of the traction roller 8 can increase the friction between the film and the film or perform specific extrusion operations on the film, so as to better realize the traction and stretching of the film. The first spring 7 sleeved on the outer surface of the connecting column 5 is fixedly connected to the support column 4 and abuts against the traction roller 8. When the traction roller 8 needs to be disassembled, the first spring 7 can directly pop out the traction roller 8, providing a certain amount of assistance for the disassembly operation.

[0036] The present invention is not limited to the above-described embodiments. Any structural changes made under the guidance of the present invention should be understood by anyone. Any technical solution that is the same or similar to the present invention falls within the scope of protection of the present invention. The technology, shape, and structure not described in detail in the present invention are all known technologies.

Claims

1. A film traction and stretching mechanism, comprising: A base (1), characterized in that a motor (2) is installed on one side of the base (1), the output end of the motor (2) is connected to a support column (4) via a screw rod (3), the front of the support column (4) is connected to a connecting column (5), and the outer surface of the connecting column (5) is connected to a traction roller (8); A sliding groove is provided inside the connecting column (5), a second spring (11) is connected inside the sliding groove, blocks (10) are connected at both ends of the second spring (11), a limit block is connected at the bottom of the block (10), a connecting shaft (12) passes through the connecting column (5), a connecting rope (13) is connected to the outer surface of the connecting shaft (12), one end of the connecting shaft (12) is connected to a hand wheel (6), and a first spring (7) is sleeved on the outer surface of the connecting column (5).

2. A film pulling and stretching mechanism according to claim 1, characterized in that: A pressing groove is provided on the outer surface of the traction roller (8), a pressing block (9) is connected to the inside of the pressing groove, and the pressing block (9) is adapted to the pressing groove, and a clamping groove is provided inside the traction roller (8).

3. The film pulling and stretching mechanism according to claim 2, characterized in that: The top and bottom of the card block (10) are both sloped, and the card block (10) is adapted to the card slot.

4. The film pulling and stretching mechanism according to claim 1, characterized in that: Four second springs (11) are provided, and the four second springs (11) are distributed in a rectangular array.

5. The film pulling and stretching mechanism according to claim 2, characterized in that: A square hole is provided inside the traction roller (8), and the square hole is adapted to the connecting column (5).

6. The film pulling and stretching mechanism according to claim 1, characterized in that: A threaded block is connected to the bottom of the support column (4), and the threaded block is threadedly connected to the screw rod (3).

7. The film pulling and stretching mechanism according to claim 1, characterized in that: The first spring (7) is fixedly connected to the support column (4), and the first spring (7) is in contact with the traction roller (8).

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