Reloading knife rest

Abstract

The embodiment of the utility model provides a material changing knife rest which comprises a supporting assembly which comprises a supporting plate and a pair of main supporting rods arranged on the supporting plate and further comprises a pair of swing frames and a central support arranged between the swing frames and provided with an abutting plate. The material cutting assemblies are arranged on the corresponding swing frames respectively, each material cutting assembly comprises a cutter with a cutting edge facing the central support, and the cutters are configured to move in the direction of the central support movably; the pair of swing frames are respectively pivoted on the pair of main supporting rods, each swing frame further comprises an upper guide roller, and each swing frame is configured to rotate around the axis of the corresponding main supporting rod under the driving of an actuating device, so that a gap between the pair of swing frames is enlarged or reduced; by means of the arrangement, sheet materials can easily enter the gaps during material changing, and the material changing efficiency and safety are improved.

Description

Technical Field

[0001] The utility model relates to a material-changing tool holder. Background Art

[0002] In the production of disposable absorbent products, automatic material changing systems are usually configured to achieve continuous, high-speed and efficient production.

[0003] These automatic material changing systems, such as those shown in documents such as CN102167237A, CN202063583U, CN208259844U, and CN211049870U, usually include two unwinding devices and a material changing knife holder arranged downstream of the unwinding device. The material changing knife holder includes a clamping and fixing device for clamping and fixing two sheets to form a connection and two cutting components for cutting the tail material. The sheet usually needs to be configured to pass through the gap between the clamping and fixing devices and the gap between the two cutting components, so that the sheet usually needs to be manually guided into these gaps when unwinding. Since these gaps need to be configured to be smaller, it is more difficult to manually guide the sheet into the gap, and there are safety hazards on the other hand, especially for sheets with larger widths.

[0004] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0005] Therefore, the utility model provides a material changing tool holder to solve the above technical problems.

[0006] A tool holder for changing material, comprising:

[0007] A support assembly includes a support plate and a pair of main support rods arranged on the support plate, and the support assembly also includes a pair of swing frames and a central support arranged between the pair of swing frames and having a contact plate;

[0008] A pair of cutting assemblies are respectively arranged on corresponding swing frames, wherein the cutting assemblies include cutting knives with cutting edges facing the central support, and the cutting knives are configured to be movable toward the central support;

[0009] The pair of swing frames are respectively pivotally connected to a pair of main support rods. The swing frames also include upper guide rollers. The swing frames are configured to rotate around the axis of the main support rod under the drive of an actuating device, and to expand or shrink the gap between the pair of swing frames.

[0010] Among them, the main support rod includes a first main support rod and a second main support rod, a pair of the swing frames include a left swing frame pivotally connected to the first main support rod and a right swing frame pivotally connected to the second main support rod, a pair of vertical plates are provided on the support plate, and the first main support rod and the second main support rod are respectively provided on one of the pair of vertical plates, the central bracket includes a horizontal plate spanning the pair of vertical plates and a middle plate extending upward from the horizontal plate, and the contact plate is provided at the end of the middle plate.

[0011] Among them, a pair of the cutting components include a first cutting component arranged on the left swing frame and a second cutting component arranged on the right swing frame, the first cutting component includes a first cutting knife device and a first pressing device, the first cutting knife device also includes a supporting device, the supporting device includes a supporting plate located at the front end of the cutting edge, the supporting plate includes a through hole for the cutting edge to pass through and a supporting surface that can contact the sheet material.

[0012] The supporting device further includes a movable shaft and an elastic element located between the supporting plate and the movable shaft. The movable shaft is connected to the first driving device and is configured to move under the drive of the first driving device. The cutter is fixedly connected to the movable shaft.

[0013] Wherein, the contact plate further includes an elastic pad, and the elastic pad is fixed at the end of the elastic element.

[0014] The supporting plate is L-shaped and includes a covering space, and the elastic pad and the cutting edge are located in the covering space.

[0015] Wherein, the said contact plate comprises a pair of contact surfaces, and the said contact surfaces are also provided with a knife groove matching with the cutting knife.

[0016] Wherein, the first pressing device is arranged below the cutter and comprises a first pressing block. The first pressing block comprises a pressing surface, and the pressing surface is flush with the abutting surface.

[0017] Among them, the left swing frame includes a pair of first side plates arranged at intervals and a main connecting plate connecting the pair of first side plates. The left swing frame is also provided with a left guide roller, and at least a part of the left guide roller protrudes from the left swing frame.

[0018] In which, the first side panel includes a top surface and a side surface facing the separation space, the first side panel includes a corner where the top surface and the side surface intersect, the left guide roller is arranged at the corner, and at least a portion of the left guide roller protrudes from the top surface and the side surface at the same time, and the angle between the side surface and the top surface is 105°~135°.

[0019] Beneficial effect: The embodiment of the present invention provides a material changing tool holder, comprising: a support assembly, comprising a support plate and a pair of main support rods arranged on the support plate, the support assembly further comprising a pair of swing frames and a central support arranged between the pair of swing frames and having a contact plate; a pair of cutting assemblies, respectively arranged on corresponding swing frames, the cutting assembly comprising a cutter with a cutting edge facing the central support, the cutter being configured to be movable toward the central support; the pair of swing frames being pivotally connected to a pair of main support rods, respectively, the swing frames further comprising upper guide rollers, and the swing frames being configured to rotate around the axis of the main support rod under the drive of an actuating device, and to expand or shrink the gap between the pair of swing frames. Through the above arrangement, it is possible to easily allow sheet materials to enter the gap during material changing, thereby improving material changing efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the tool holder for material replacement provided by the embodiment of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the frame and left swing frame;

[0022] Figure 3 for Figure 1 The structural diagram on the right side of the middle left view;

[0023] Figure 4 for Figure 1 Schematic diagram of the first cutting component in FIG;

[0024] Figure 5 for Figure 1 Schematic diagram of the central support in;

[0025] Figure 6 for Figure 5 Right view;

[0026] Description of components in the picture:

[0027] Frame 11; support plate 12; first main support rod 13; vertical plate 14; clamping part 141; left swing frame 20; spacing space 200; first side plate 21; top surface 211; side surface 212; main connecting plate 22; actuator 23; left guide roller 24; right swing frame 30; right guide roller 31; second main support rod 32; central support 40; second side plate 41; transverse plate 411; middle plate 412; abutment plate 42; knife groove 421; first cutting assembly 50; abutment plate 51; covering space 510; through hole 511; elastic pad 512; cutter 52; cutting edge 521; movable shaft 53; coil spring 531; knife seat 54; fixing bolt 55; first driving device 56; first holding block 57; second driving device 58; second cutting assembly 60; second holding block 61; lower guide roller 71; first sheet material 80. DETAILED DESCRIPTION

[0028] Please refer to Figure 1-Figure 4 , an embodiment of the utility model provides a material changing tool holder for automatically changing sheet materials.

[0029] It can be understood that the sheet material can be a thin sheet, such as non-woven fabric, dust-free paper, PE film, absorbent lining paper, etc. At the same time, the sheet material can have a basis weight of 8 to 60 gsm. Of course, the sheet material can also be other suitable materials and have other suitable basis weights, which are not limited here.

[0030] It can be understood that the upstream of the material changing knife holder also includes a unwinding device and a sheet conveying device for releasing the sheet material to the material changing knife holder. In this case, the sheet material is wound into a roll and released to the material changing knife holder by the unwinding device. At the same time, there are two unwinding devices to release two rolls of sheet material, so as to facilitate the material changing knife holder to switch the feeding sheet material rolls. For the convenience of description, the two material rolls are respectively referred to as the first sheet material roll and the second sheet material roll, the sheet material released by the first sheet material roll is referred to as the first sheet material 80, and the sheet material released by the second sheet material roll is referred to as the second sheet material (not shown).

[0031] The material changing tool holder comprises a supporting assembly and a pair of cutting assemblies arranged on the supporting assembly.

[0032] The support assembly includes a frame 11, a support plate 12, a pair of main support rods arranged on the support plate 12, a pair of swing frames arranged on the corresponding main support rods, and a central support 40 arranged between the pair of swing frames.

[0033] The frame 11 includes a main board (not shown) and a beam extending outward from the main board. The support plate 12 is horizontally arranged on the beam. The pair of main support rods parallel to the extension direction of the beam are arranged above the support plate 12. The pair of main support rods are arranged in parallel and spaced apart to support the pair of swing frames.

[0034] For the convenience of description, the main support rod on the left side of the pair of main support rods is called the first main support rod 13, and the main support rod on the right side is called the second main support rod 32. At the same time, the swing frame arranged on the first main support rod 13 is called the left swing frame 20, and the swing frame arranged on the second main support rod 32 is called the right swing frame 30. The first main support rod 13 and the second main support rod 32 are symmetrically arranged, and the left swing frame 20 and the right swing frame 30 are symmetrically arranged. In the following description, only the first main support rod 13 and the left swing frame 20 will be described in detail, and the second main support rod 32 and the right swing frame 30 will not be repeated.

[0035] In this embodiment, a pair of vertical plates 14 are provided on the support plate 12, the first main support rod 13 is fixed on the vertical plate 14 on the left side of the pair of vertical plates 14, and the second main support rod 32 is fixed on the vertical plate 14 on the right side of the pair of vertical plates 14. At the same time, the vertical plate 14 includes a clamping portion 141, and the main vertical rod is fixed to the vertical plate 14 by clamping the clamping portion 141.

[0036] The left swing frame 20 includes a pair of first side plates 21 arranged at intervals and a main connecting plate 22 connecting the pair of first side plates 21. In this embodiment, the main connecting plate 22 is arranged in the middle of the first side plate 21, and makes the left swing frame 20 roughly H-shaped. The left swing frame 20 is pivotally connected to the first main support rod 13 and is configured to rotate around the axis of the main support rod under the drive of an actuator 23, thereby expanding or shrinking the gap between the left swing frame 20 and the right swing frame 30.

[0037] In this embodiment, the first side plate 21 is pivotally connected to the first main support rod 13 so that the left swing frame 20 can rotate around the axis of the first main support rod 13. Specifically, the first side plate 21 includes a through hole for penetrating the first main support rod 13. At the same time, a bearing seat is provided on the outer side of the first side plate 21. The bearing seat is provided with a bearing having an inner ring sleeved on the first main support rod 13 and an outer ring clamped on the bearing seat. The first side plate 21 is pivotally connected to the first main support rod 13 through the bearing and the bearing seat.

[0038] At the same time, in this embodiment, the actuating device 23 is a cylinder, which includes a cylinder body connected to the left swing frame 20 and a piston pivotally connected to the support plate 12 at one end. When the piston moves, it pushes the left swing frame 20 to rotate around the axis of the first main support rod 13.

[0039] In addition, a left guide roller 24 is provided on the left swing frame 20 for supporting the sheet material and guiding the sheet material into the gap 200 between the left swing frame 20 and the right swing frame 30. At least a portion of the left guide roller 24 protrudes from the left swing frame 20 so that the sheet material can smoothly enter the gap 200.

[0040] Furthermore, the first side panel 21 includes a top surface 211 and a side surface 212 facing the partition space 200, the first side panel 21 includes a corner where the top surface 211 and the side surface 212 intersect, the left guide roller 24 is arranged at the corner, and at least a portion of the left guide roller 24 protrudes from the top surface 211 and the side surface 212 at the same time.

[0041] Furthermore, the side surface 212 is inclined to the top surface 211, and the angle between the side surface 212 and the top surface 211 is 105° to 135°, so that the sheet material can enter the spacing space 200 more smoothly and will not collide with the side surface 212 during the clamping or cutting process.

[0042] Please refer to Figure 5 and Figure 6 ,exist Figure 5 and Figure 6 The central bracket 40 in this embodiment is shown in the figure. The central bracket 40 includes a pair of second side plates 41 and a contact plate 42 connecting the pair of second side plates 41. The contact plate 42 is used to cooperate with the cutter 52 so that the cutter 52 cuts the first sheet material 80.

[0043] In this embodiment, the second side panel 41 is connected across a pair of vertical panels 14. Specifically, the second side panel 41 includes a horizontal panel 411 and a middle panel 412, wherein both ends of the horizontal panel 411 are respectively fixed on a pair of vertical panels 14, the middle panel 412 extends upward from the horizontal panel 411 in a vertical direction, and the contact panel 42 is fixed on one end of the middle panel 412 away from the horizontal panel 411.

[0044] It can be understood that the contact plate 42 is arranged in a horizontal direction and is arranged parallel to the first main support rod 13 and the second main support rod 32 .

[0045] The contact plate 42 includes a pair of contact surfaces for respectively cooperating with a pair of cutters 52. In this embodiment, a knife groove 421 is also provided on the contact surface. The cutter 52 cooperates with the knife groove 421 to cut the sheet material. It can be understood that the length of the knife groove 421 matches the length of the cutter 52.

[0046] A pair of cutting components are respectively arranged on corresponding swing frames. The cutting components include a cutter 52 with a cutting edge 521 facing the central bracket 40. The cutter 52 is configured to be movable toward the central bracket 40. At the same time, the sheet material is cut through the cooperation between the cutter 52 and the contact plate 42.

[0047] It can be understood that a pair of cutter 52 components respectively include a first cutting component 50 provided on the left swing frame 20 and a second cutting component 60 provided on the right swing frame 30. Please refer to Figure 4 ,exist Figure 4 , a structural diagram of the first cutting assembly 50 is shown.

[0048] The first cutting component 50 includes a first cutting device and a first pressing device, and the second cutting component 60 includes a second cutting device and a second pressing device. In this embodiment, the first cutting device is located upstream of the movement of the first sheet material 80, and the first pressing device is located downstream of the movement of the first sheet material 80. The cutter 52 includes a cutting edge 521, and the cutting edge 521 faces the central support 40. The cutter 52 is configured to be movable toward the central support 40 so that the cutter 52 cooperates with the contact plate 42 to cut the first sheet material 80.

[0049] In this embodiment, the first cutter device further includes a supporting device, which includes a supporting plate 51 located at the front end of the cutting edge 521 of the cutter 52. The supporting plate 51 includes a through hole 511 for the cutting edge 521 to pass through and a supporting surface that can contact the first sheet material 80. The supporting plate 51 is also configured to be movable toward the cutter 52 and allow the cutter 52 to pass through the through hole 511. It can be understood that when the cutter 52 does not need to cut the first sheet material 80, the cutter 52 will be located on the inner side of the supporting plate 51. The supporting plate 51 protects the cutter 52, which can keep the cutter 52 sharp on the one hand and ensure safety and prevent the cutter 52 from causing unexpected damage to the first sheet material 80 on the other hand.

[0050] Furthermore, the supporting device also includes a movable shaft 53 and an elastic element located between the supporting plate 51 and the movable shaft 53. The movable shaft 53 is connected to the first driving device 56 and is configured to move under the drive of the first driving device 56. The cutter 52 is fixedly connected to the movable shaft 53. It can be understood that when the movable shaft 53 moves, the supporting plate 51 moves synchronously. When the supporting plate 51 contacts the first sheet material 80 and the supporting plate 42, the supporting plate 51 stops moving and the elastic element is compressed. The cutter 52 moves toward the supporting plate 51 and passes through the through hole 511 to cut off the first sheet material 80 between the supporting plate 51 and the supporting plate 42.

[0051] In this embodiment, the elastic element is a coil spring 531 .

[0052] Furthermore, the abutment plate 42 further includes an elastic pad 512 , which is fixed to the end of the elastic element. The elastic pad 512 is used for secondary buffering, thereby facilitating the abutment of the abutment plate 51 against the first sheet material 80 .

[0053] Furthermore, the supporting plate 51 is L-shaped and includes a covering space 510 , and the elastic pad 512 and the cutting edge 521 are located in the covering space 510 .

[0054] Furthermore, the supporting device further includes a knife seat 54 connected to the movable shaft 53 and a fixing bolt 55 for fixing the cutter 52 on the knife seat 54 .

[0055] The first pressing device is arranged below the cutter 52, and includes a first pressing block 57 and a second driving device 58 connected to the first pressing block 57. The first pressing block 57 is configured to move toward the central support 40 under the drive of the second driving device 58, and cooperate with the second pressing device provided on the second cutting assembly 60 to press the first sheet material 80 and the second sheet material.

[0056] Furthermore, the first pressing block 57 is an elastic block. In a preferred embodiment, the first pressing block 57 is made of polyurethane material.

[0057] Furthermore, the first pressing block 57 includes a pressing surface, and the pressing surface is flush with the abutting surface.

[0058] In this embodiment, the first driving device 57 and the second driving device 58 are both cylinders.

[0059] It can be understood that when material replacement is required, the second sheet material enters the gap 200 between the first pressing device and the second pressing device, and the first pressing device and the second pressing device move in a relatively close direction so that the first pressing device and the second pressing device press the sheet material. When a combining device is provided at the head of the second sheet material, when the first pressing device and the second pressing device press the sheet material, the head of the second sheet material is combined with the first sheet material 80, and then the first cutter 52 moves toward the direction of the first sheet material 80 and cuts off the first sheet material 80 with the cooperation of the contact plate 42. Afterwards, the second sheet material is guided to move by the first sheet material 80 in the front, thereby completing the switching of the sheet materials, that is, completing the material replacement. Similarly, the material replacement from the second sheet material to the first sheet material 80 can be completed.

[0060] It can be understood that the right swing frame 30 is also provided with a right guide roller 31, and the material changing knife frame also includes a lower guide roller 71 arranged downstream of the cutting assembly. The first cutter 52 cuts the first sheet material 80 between the left guide roller 24 and the lower guide roller 71, and the second cutter 52 cuts the second sheet material located between the right guide roller 31 and the lower guide roller 71.

[0061] It can be understood that in this embodiment, when it is necessary to guide the head of the second sheet material to the spacing space 200, the right swing frame 30 can be swung away from the central support 40 first, thereby expanding the spacing space 200 and allowing the right guide roller 31 to be closer to the head of the second sheet material, so that the head of the second sheet material can easily enter the spacing space 200, and then the right swing frame 30 is swung in the direction close to the central support 40 to return to a position symmetrical with the left swing frame 20. On the one hand, material replacement and cutting operations can be performed, and on the other hand, the right guide roller 31 can assist in pulling the second sheet material to move during this process, thereby improving the efficiency and safety of the entire operation. At the same time, the left swing frame 20 can be operated through the above process to replace the first sheet material 80.

[0062] In addition, the position of the first sheet material can be limited upstream of the first pressing device and the second pressing device by the holding device, so that the cutter can cut the sheet material more easily.

[0063] The above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tool holder for changing material, characterized in that: include: A support assembly includes a support plate and a pair of main support rods arranged on the support plate, and the support assembly also includes a pair of swing frames and a central support arranged between the pair of swing frames and having a contact plate; A pair of cutting assemblies are respectively arranged on corresponding swing frames, wherein the cutting assemblies include cutting knives with cutting edges facing the central support, and the cutting knives are configured to be movable toward the central support; The pair of swing frames are respectively pivotally connected to a pair of main support rods. The swing frames also include upper guide rollers. The swing frames are configured to rotate around the axis of the main support rod under the drive of an actuating device, and to expand or shrink the gap between the pair of swing frames.

2. The tool holder for changing material according to claim 1, characterized in that: The main support rods include a first main support rod and a second main support rod, a pair of swing frames include a left swing frame pivotally connected to the first main support rod and a right swing frame pivotally connected to the second main support rod, a pair of vertical plates are provided on the support plate, and the first main support rod and the second main support rod are respectively provided on one of the pair of vertical plates, the central bracket includes a horizontal plate spanning the pair of vertical plates and a middle plate extending upward from the horizontal plate, and the contact plate is provided at the end of the middle plate.

3. The tool holder for changing material according to claim 2, characterized in that: A pair of cutting assemblies include a first cutting assembly arranged on a left swing frame and a second cutting assembly arranged on a right swing frame, the first cutting assembly includes a first cutting knife device and a first pressing device, the first cutting knife device also includes a supporting device, the supporting device includes a supporting plate located at the front end of the cutting edge, the supporting plate includes a through hole for the cutting edge to pass through and a supporting surface that can contact the sheet material.

4. The tool holder for changing material according to claim 3, characterized in that: The supporting device further includes a movable shaft and an elastic element located between the supporting plate and the movable shaft. The movable shaft is connected to the first driving device and is configured to move under the drive of the first driving device. The cutter is fixedly connected to the movable shaft.

5. The tool holder for changing material according to claim 4, characterized in that: The contact plate further includes an elastic pad, which is fixed at the end of the elastic element.

6. The tool holder for changing material according to claim 5, characterized in that: The supporting plate is L-shaped and includes a covering space, and the elastic pad and the cutting edge are located in the covering space.

7. The tool holder for changing material according to claim 5, characterized in that: The contact plate comprises a pair of contact surfaces, and the contact surfaces are provided with knife grooves matching the cutting knife.

8. The tool holder for changing material according to claim 5, characterized in that: The first pressing device is arranged below the cutter and comprises a first pressing block. The first pressing block comprises a pressing surface, and the pressing surface is flush with the abutting surface.

9. The tool holder for changing material according to claim 5, characterized in that: The left swing frame includes a pair of first side plates arranged at intervals and a main connecting plate connecting the pair of first side plates. The left swing frame is also provided with a left guide roller, and at least a portion of the left guide roller protrudes from the left swing frame.

10. The tool holder for changing material according to claim 9, characterized in that: The first side panel includes a top surface and a side surface facing the separation space, the first side panel includes a corner where the top surface and the side surface intersect, the left guide roller is arranged at the corner, and at least a portion of the left guide roller protrudes from the top surface and the side surface at the same time, and the angle between the side surface and the top surface is 105° to 135°.

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