Special-shaped cap grabbing head and capping machine

Abstract

The present invention discloses a special-shaped cap grabbing head and a capping machine. The special-shaped cap grabbing head includes a cap grabbing head body, at least two cap grabbing fingers, at least two springs, and at least two clamping blocks. The cap grabbing head body includes a tube body and a limit block. The limit block is arranged in the tube body. The tube body is provided with at least two mounting grooves, which are arranged along the length of the tube body. The cap grabbing fingers are arranged in the mounting grooves. The non-end portion of the cap grabbing finger is hinged to the tube body. The clamping block is detachably arranged at one end of the cap grabbing finger. One end of the spring is connected to the cap grabbing finger, and the other end of the spring is connected to the limit block. The spring and the clamping block are located on the same side of the rotation axis of the cap grabbing finger. The spring causes the cap grabbing finger to have a tendency to move away from the limit block. The special-shaped cap grabbing head of the present invention has a simple and compact overall structure and high reliability. Different clamping blocks can also be quickly replaced according to the shape of the bottle cap without replacing the entire cap grabbing head, thereby effectively reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging machinery, in particular to a special-shaped cap grabbing head and a capping machine. Background Art

[0002] The daily chemical industry is rapidly evolving, and to attract consumers, product packaging innovations are often employed. For example, shampoo bottles are now available in various unusual shapes, such as square and oval. The packaging caps of daily chemical products are also often irregular, rather than regular. While retaining the cap's sealing function, these caps often feature comfortable ergonomics, a pleasing appearance, and vibrant colors to attract consumers. To save costs, the cap's sealing threads are often left unchanged, allowing for a more innovative overall appearance without requiring extensive modifications to packaging equipment. Conventional capping heads are often only suitable for one cap shape, requiring separate capping heads for multiple cap shapes. This increases production costs and requires the entire capping head to be replaced whenever the cap shape changes, reducing assembly efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a special-shaped cap grabbing head and a capping machine, which can quickly adapt to the grabbing of caps of different shapes, improve the efficiency of cap assembly and reduce the cost.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Provided is a special-shaped cover grabbing head, comprising a cover grabbing head main body, at least two cover grabbing fingers, at least two springs and at least two clamping blocks, the cover grabbing head main body comprising a tube body and a limit block, the limit block being arranged within the tube body, the tube body being provided with at least two mounting grooves, the mounting grooves being opened along the length direction of the tube body, the cover grabbing fingers being arranged in the mounting grooves, the non-end portions of the cover grabbing fingers being hinged to the tube body, the clamping block being detachably arranged at one end of the cover grabbing fingers, one end of the spring being connected to the cover grabbing fingers, the other end of the spring being connected to the limit block, the spring and the clamping block being located on the same side of the rotation axis of the cover grabbing fingers, and the spring causing the cover grabbing fingers to tend to move away from the limit block.

[0006] As a preferred solution of the special-shaped cover grabbing head of the present invention, the cover grabbing finger includes a finger body and a limiting protrusion, the clamping block is arranged at one end of the finger body, the limiting protrusion is arranged on the surface of the finger body, the limiting protrusion is located above the limiting block, and the limiting protrusion can abut against the limiting block.

[0007] As a preferred solution of the special-shaped cover grabbing head of the present invention, a first blind hole is opened on the limit block, a second blind hole is opened on the finger body, and both ends of the spring are respectively arranged in the first blind hole and the second blind hole.

[0008] As a preferred solution of the special-shaped cover grabbing head of the present invention, the cover grabbing finger also includes a force-bearing component, which includes an ear seat, a first pin shaft, a first bearing and a ring. The ear seat is fixed to the end of the finger body away from the clamping block, the first pin shaft passes through the ear seat, the first bearing is sleeved on the first pin shaft, and the ring is sleeved on the first bearing.

[0009] As a preferred solution of the special-shaped cover grabbing head of the present invention, the special-shaped cover grabbing head also includes a hinge assembly, and the hinge assembly includes a second pin shaft and a second bearing, the second pin shaft is arranged on the tube body and passes through the finger body, and the second bearing is sleeved on the second pin shaft and connected to the finger body.

[0010] As a preferred solution of the special-shaped cover grabbing head of the present invention, the limit block divides the interior of the tube body into a first cavity and a second cavity, and a through hole is opened on the limit block, and the through hole connects the first cavity and the second cavity, the limit protrusion is located in the first cavity, and the clamping block surrounds the second cavity.

[0011] As a preferred solution of the special-shaped cover grabbing head of the present invention, the cover grabbing head body also includes at least two positioning columns, the positioning columns are arranged at one end of the tube body, and a clamping block is provided on both sides of one positioning column, and a positioning column is provided on both sides of one clamping block, and the positioning columns and the clamping block together form an annular structure surrounding the second cavity.

[0012] As a preferred solution of the special-shaped cap grabbing head of the present invention, the clamping block includes a clamping block body and an abutting block, the clamping block body is provided with a groove, the abutting block is detachably arranged in the groove, and the abutting block is used to contact the bottle cap.

[0013] As a preferred solution of the special-shaped cap grabbing head of the present invention, the surface of the clamping block in contact with the bottle cap adopts a tooth-shaped structure.

[0014] On the other hand, a capping machine is provided, comprising a capping head and a special-shaped cap grabbing head as described in any of the above technical solutions, wherein the capping head comprises a movably arranged pusher head, which selectively abuts against an end of the cap grabbing finger away from the clamping block, and the pusher head can drive the cap grabbing finger to rotate and compress the spring, so that the cap grabbing finger leans against the limit block.

[0015] Beneficial effects of the present invention:

[0016] The cap-grabbing fingers of the special-shaped cap-grabbing head of the present invention are hinged to the tube body. When not subjected to external force, the elastic force of the spring causes the cap-grabbing fingers to tend to move away from the limit block, so that the clamping block provided at one end of the cap-grabbing fingers remains in an open posture, allowing the bottle cap to enter between the clamping blocks. When the bottle cap is in place, a force is applied to the end of the cap-grabbing fingers away from the clamping block, which can drive the cap-grabbing fingers to rotate and compress the spring, so that the cap-grabbing fingers lean against the limit block, and the clamping block provided on the cap-grabbing fingers is tightened accordingly, thereby clamping the bottle cap. When the capping is completed, the clamping block automatically opens under the action of the spring force, and the bottle cap is released. The special-shaped cap-grabbing head of the present invention has a simple and compact overall structure and high reliability. Different clamping blocks can also be quickly replaced according to the shape of the bottle cap without replacing the entire cap-grabbing head, effectively reducing costs and improving capping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a special-shaped cap grasping head clamping a bottle cap according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the middle clamp after releasing the bottle cap;

[0019] Figure 3 for Figure 1 AA section view;

[0020] Figure 4 for Figure 1 Cross-sectional structural diagram of the load-bearing component;

[0021] Figure 5 for Figure 1 BB cross-sectional view;

[0022] Figure 6 for Figure 1 CC sectional view;

[0023] Figure 7 A three-dimensional view of a clamping block body according to an embodiment of the present invention;

[0024] Figure 8 for Figure 1 Schematic diagram of the structure when the middle special-shaped cap grabbing head clamps the bottle cap;

[0025] Figure 9 This is a structural schematic diagram of a special-shaped cap grasping head clamping a bottle cap in accordance with another embodiment of the present invention;

[0026] Figure 10 for Figure 9 A structural diagram of the special-shaped cap grasping head of the embodiment when clamping the bottle cap.

[0027] In the picture:

[0028] 1. Cap grabbing head body; 11. Tube body; 111. Mounting groove; 112. First cavity; 113. Second cavity; 12. Limit block; 121. First blind hole; 122. Through hole; 13. Positioning column; 2. Cap grabbing finger; 21. Finger body; 211. Second blind hole; 22. Limiting protrusion; 23. Force-bearing component; 231. Ear seat; 232. First pin; 233. Ring; 234. First bearing; 235. Gasket; 3. Spring; 4. Clamp; 41. Clamp body; 411. Groove; 42. Abutment block; 43. Screw; 5. Hinge assembly; 51. Second pin; 52. Second bearing; 53. Rubber ring; 6. Push head; 100. Bottle cap one; 200. Bottle cap two DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above" a second feature may include the first feature being directly above or diagonally above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below" a second feature may include the first feature being directly below or diagonally below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0032] like Figures 1 to 3 As shown, an embodiment of a special-shaped cover grabbing head includes a cover grabbing head body 1, three cover grabbing fingers 2, three springs 3 and three clamping blocks 4. The cover grabbing head body 1 includes a tube body 11 and a limit block 12. The limit block 12 is arranged in the tube body 11. Three mounting grooves 111 are opened on the tube body 11. The mounting grooves 111 are opened along the length direction of the tube body 11. The cover grabbing fingers 2 are arranged in the mounting grooves 111. The non-end parts of the cover grabbing fingers 2 are hinged to the tube body 11 through a hinge assembly 5. The clamping block 4 is detachably arranged at one end of the cover grabbing finger 2. One end of the spring 3 is connected to the cover grabbing finger 2, and the other end of the spring 3 is connected to the limit block 12. The spring 3 and the clamping block 4 are located on the same side of the rotation axis of the cover grabbing finger 2. The spring 3 causes the cover grabbing finger 2 to have a tendency to move away from the limit block 12.

[0033] The cap-grabbing finger 2 of the special-shaped cap grabbing head of this embodiment is hingedly connected to the tube body 11. When not subjected to external force, the elastic force of the spring 3 causes the cap-grabbing finger 2 to move away from the limit block 12, causing the clamping block 4 set at one end of the cap-grabbing finger 2 to remain in an open position to allow the bottle cap 100 to enter between the clamping blocks 4. When the bottle cap 100 is in place, applying force to the end of the cap-grabbing finger 2 away from the clamping block 4 can drive the cap-grabbing finger 2 to rotate and compress the spring 3, causing the cap-grabbing finger 2 to move toward the limit block 12. The clamping block 4 set on the cap-grabbing finger 2 is tightened, thereby clamping the bottle cap 100. When the cap is screwed on, the clamping block 4 automatically opens under the action of the elastic force of the spring 3, and the bottle cap 100 is released. The special-shaped cap grabbing head of this embodiment has a simple and compact overall structure and high reliability. It can also quickly replace different clamping blocks 4 according to the shape of the cap without replacing the entire cap-grabbing head, effectively reducing costs. To achieve the purpose of cap gripping, the number of the cap gripping fingers 2, spring 3, and clamping block 4 should be at least two. In this embodiment, the number of the cap gripping fingers 2, spring 3, and clamping block 4 is three, which can firmly grip the bottle cap 100. In other embodiments, the number of the cap gripping fingers 2, spring 3, and clamping block 4 is four or more, which can be flexibly adjusted according to actual needs.

[0034] An embodiment of the present invention further provides a capping machine, comprising a capping head and the special-shaped capping head of the above embodiment. The capping head comprises a movably arranged pusher head 6, which selectively abuts against the end of the capping finger 2 away from the clamping block 4. The pusher head 6 can drive the capping finger 2 to rotate and compress the spring 3, so that the capping finger 2 leans against the limit block 12. The surface of the pusher head 6 is truncated cone-shaped or conical. As the pusher head 6 is inserted into the tube body 11, the pusher head 6 can continuously apply force to the capping finger 2, so that the capping finger 2 can rotate smoothly, and the clamping block 4 can thus more easily clamp the bottle cap 100. Since the clamping block 4 can be quickly replaced according to the capping operation of the capping operation, the capping machine of this embodiment can meet the capping needs of caps of different shapes and can be quickly switched.

[0035] like Figure 2 As shown, the capping finger 2 further includes a finger body 21 and a limiting protrusion 22. The clamping block 4 is provided at one end of the finger body 21, and the limiting protrusion 22 is provided on the surface of the finger body 21. The limiting protrusion 22 is located above the limiting block 12 and can abut against the limiting block 12. When the spring 3 pushes the finger body 21 away from the limiting block 12, the limiting protrusion 22 can abut against the top of the limiting block 12, thereby preventing the finger body 21 from continuing to rotate. The finger body 21 can always stop at the same position after the cap is screwed on. At this time, the spring 3 is still in a compressed state, so that the limiting protrusion 22 of the capping finger 2 can always abut against the limiting block 12, keeping the capping finger 2 in a stable posture. The clamping block 4 fixed at the end of the capping finger 2 can also maintain a stable posture before the cap is clamped, and will not shake and interfere with the normal cap clamping action.

[0036] Furthermore, Figure 1 As shown, the limiting block 12 is provided with a first blind hole 121. Figure 2 As shown, a second blind hole 211 is provided on the finger body 21, and the two ends of the spring 3 are respectively arranged in the first blind hole 121 and the second blind hole 211. When the clamping block 4 clamps the bottle cap 100, the spring 3 will be compressed. In order to prevent the spring 3 from interfering with the clamping block 4, the spring 3 should retain a margin for further compression. If the first blind hole 121 and the second blind hole 211 are not provided, even when the spring 3 is compressed to the limit, the clamping block 4 still cannot come into contact with the bottle cap 100, resulting in the clamping block 4 being unable to clamp the bottle cap 100. In addition, the first blind hole 121 and the second blind hole 211 can also prevent the spring 3 from twisting and deforming, ensuring that the spring 3 maintains a stable shape during repeated compression and providing stable elastic support.

[0037] like Figure 2 and Figure 4 As shown, the capping finger 2 also includes a force-bearing assembly 23, which includes an ear seat 231, a first pin 232, a collar 233, a first bearing 234, and a gasket 235. The ear seat 231 is fixed to the end of the finger body 21 away from the clamping block 4. The first pin 232 passes through the ear seat 231. The first bearing 234 is mounted on the first pin 232. The collar 233 is mounted on the first bearing 234. The gasket 235 is disposed between the ear seat 231 and the collar 233 to prevent the collar 233 from axially displacing and rubbing against the ear seat 231. The push head 6 rotates the capping finger 2 by contacting the force-bearing assembly 23. When the capping machine is operating, the push head 6 frequently interacts with the force-bearing assembly 23. Therefore, the friction between the two should be as small as possible. This not only prolongs the service life of the components, but also ensures smoother rotation of the capping finger 2. In this embodiment, there is sliding friction between the force-bearing component 23 and the push head 6. When the push head 6 contacts the surface of the collar 233, the collar 233 rotates, so that the friction between the push head 6 and the collar 233 is very small, which is conducive to the stable operation of the capping machine.

[0038] Figure 5 As shown, the hinge assembly 5 includes a second pin 51, a second bearing 52, and a rubber ring 53. The second pin 51 is mounted on the tube 11 and extends through the finger body 21. The second bearing 52 is mounted on the second pin 51 and connected to the finger body 21. The rubber ring 53 is mounted on one end of the second pin 51 to prevent the second pin 51 from loosening. The capping finger 2 frequently swings, and the hinge assembly 5 enables the capping finger 2 to rotate stably and with minimal resistance on the tube 11, preventing the capping finger 2 from loosening or shaking after prolonged operation, and ensuring that the clamp 4 maintains full contact with the bottle cap 100.

[0039] like Figure 2 As shown, the limiting block 12 divides the interior of the tube body 11 into a first cavity 112 and a second cavity 113. A through hole 122 is provided on the limiting block 12, which connects the first cavity 112 and the second cavity 113. The limiting protrusion 22 and the push head 6 are located in the first cavity 112, and the clamping block 4 surrounds the second cavity 113. The first cavity 112 provides space for the push head 6 to enter and also reduces the weight of the cover grabbing head body 1. The second cavity 113 forms two limiting planes at the bottom of the cover grabbing head body 1, one at the bottom of the tube body 11 and the other at the bottom of the limiting block 12. This provides two different limiting planes for the top of the cover to abut and position, making it suitable for a wider variety of covers. Figure 2 The top of the bottle cap 100 is positioned by abutting against the bottom of the tube body 11. During the abutment between the top of the bottle cap 100 and the bottom of the tube body 11, the air is compressed to a certain extent. If the through hole 122 is not provided to connect the first cavity 112 and the second cavity 113, the pressure generated by the compressed gas may make the bottle cap 100 unstable, thereby interfering with the smooth gripping of the clamp 4.

[0040] like Figure 1 and Figure 6 As shown, the main body 1 of the cap grabbing head further includes three positioning posts 13, which are arranged at one end of the tube body 11. A clamping block 4 is provided on both sides of each positioning post 13, and a clamping block 4 is provided on both sides of each positioning post 13. The positioning posts 13 and the clamping block 4 together form an annular structure surrounding the second cavity 113. The number of positioning posts 13 is the same as the number of clamping blocks 4. Before the clamping block 4 grabs the bottle cap 100, the positioning posts 13 can first play a positioning role to center the bottle cap 100. Figure 1 As shown, in order to better center the bottle cap 100, the end of the positioning post 13 away from the tube body 11 is beveled to form an inclined surface with a guiding function.

[0041] like Figure 2 As shown, the clamping block 4 includes a clamping block body 41, an abutting block 42 and a screw 43. The clamping block body 41 is detachably fixed to the tube body 11 by the screw 43. Figure 7 As shown, the clamp body 41 is provided with a groove 411, and the abutment block 42 is detachably disposed in the groove 411. The abutment block 42 is used to contact the bottle cap 100. During the capping process, the abutment block 42 will rub against the bottle cap 100. Therefore, the groove 411 is provided on the clamp body 41 to enable the abutment block 42 to be quickly replaced.

[0042] like Figure 8 As shown, Figure 1The special-shaped cap grabbing head of the illustrated embodiment can also be used to grab the second bottle cap 200 . The second bottle cap 200 is different in shape from the first bottle cap 100 . The top of the second bottle cap 200 abuts against the limiting block 12 , and the entire second bottle cap 200 is surrounded by the clamping block 4 .

[0043] like Figure 9 and Figure 10 As shown, in another embodiment, the clamp block 4 adopts an integrated structure and is made entirely of stainless steel or other wear-resistant materials. The surface of the clamp block 4 that contacts the bottle cap 100 or the bottle cap 200 adopts a toothed structure. In order to increase friction and facilitate manual tightening, the surface of the bottle cap 100 or the bottle cap 200 is provided with uneven strip-shaped teeth. The toothed structure on the surface of the clamp block 4 matches the strip-shaped teeth on the surface of the bottle cap 100 or the bottle cap 200. When screwing the cap, the clamp block 4 is not likely to slide relative to the surface of the bottle cap 100 or the bottle cap 200.

[0044] The capping head of the capping machine has two modes: servo capping and hysteresis capping. After the servo capping tightens the cap, the capping head will stop rotating. The capping head and the cap are in a relatively static state, which will not damage the surface of the cap. Therefore, stainless steel and other materials can be used to make the clamping block 4, which has a longer service life and extends the replacement time. Figure 9 and Figure 10 The special-shaped cap grabbing head of the illustrated embodiment is matched with the capping head of the hysteresis cap.

[0045] Figure 1 The special-shaped cover grabbing head of the illustrated embodiment is matched with the capping head of the hysteresis capping head. After the cap is tightened, the hysteresis capping head will continue to rotate, and friction will occur between the cap and the clamping block 4. Therefore, a material with a smooth surface and a certain hardness is required to contact the cap. The clamping block 4 needs to be set to a split structure, and the part of the clamping block 4 that contacts the cap is made of rubber or other materials, so as to reduce the wear on the cap.

[0046] In the description of this specification, the reference terms "preferably," "further," etc., as preferred embodiments of the present invention, indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0047] The above embodiments are merely illustrative of the detailed embodiments of the present invention. The present invention is not limited to the detailed embodiments described above, nor does it necessarily rely on the detailed embodiments to be implemented. Those skilled in the art will appreciate that any improvements to the present invention, equivalent replacements of raw materials for the products of the present invention, addition of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A special-shaped cover grabbing head, characterized in that: The invention comprises a cover grabbing head body, at least two cover grabbing fingers, at least two springs and at least two clamping blocks, wherein the cover grabbing head body comprises a tube body and a limit block, the limit block is arranged in the tube body, the tube body is provided with at least two mounting grooves, the mounting grooves are opened along the length direction of the tube body, the cover grabbing fingers are arranged in the mounting grooves, the non-end parts of the cover grabbing fingers are hinged to the tube body, the clamping block is detachably arranged at one end of the cover grabbing fingers, one end of the spring is connected to the cover grabbing fingers, and the other end of the spring is connected to the limit block, the spring and the clamping block are located on the same side of the rotation axis of the cover grabbing fingers, and the spring makes the cover grabbing fingers tend to move away from the limit block; The cover grabbing finger includes a finger body and a limiting protrusion, the clamping block is arranged at one end of the finger body, the limiting protrusion is arranged on the surface of the finger body, the limiting protrusion is located above the limiting block, and the limiting protrusion can abut against the limiting block; The limiting block divides the interior of the tube into a first cavity and a second cavity. A through hole is formed on the limiting block, and the through hole connects the first cavity and the second cavity. The limiting protrusion is located in the first cavity, and the clamping block surrounds the second cavity. The main body of the cover grabbing head further includes at least two positioning posts, each of which is provided at one end of the tube body. A clamping block is provided on both sides of one positioning post, and a positioning post is provided on both sides of one clamping block. The positioning posts and the clamping block together form an annular structure surrounding the second cavity. A first blind hole is formed on the limit block, a second blind hole is formed on the finger body, and two ends of the spring are respectively arranged in the first blind hole and the second blind hole.

2. The special-shaped cover grabbing head according to claim 1, characterized in that: The cover grabbing finger also includes a force-bearing component, which includes an ear seat, a first pin shaft, a first bearing and a collar. The ear seat is fixed to the end of the finger body away from the clamping block, the first pin shaft passes through the ear seat, the first bearing is sleeved on the first pin shaft, and the collar is sleeved on the first bearing.

3. The special-shaped cover grabbing head according to claim 1, characterized in that: It also includes a hinge assembly, which includes a second pin and a second bearing. The second pin is arranged on the tube body and passes through the finger body. The second bearing is sleeved on the second pin and connected to the finger body.

4. The special-shaped cover grabbing head according to claim 1, characterized in that: The clamping block comprises a clamping block body and an abutting block. The clamping block body is provided with a groove. The abutting block is detachably arranged in the groove. The abutting block is used to contact the bottle cap.

5. The special-shaped cover grabbing head according to claim 1, characterized in that: The surface of the clamping block in contact with the bottle cap adopts a toothed structure.

6. A capping machine, characterized in that: It comprises a screw capping head and the special-shaped cap grabbing head according to any one of claims 1 to 5, wherein the screw capping head comprises a movably arranged pusher head, which selectively abuts against the end of the cap grabbing finger away from the clamping block, and the pusher head can drive the cap grabbing finger to rotate and compress the spring, so that the cap grabbing finger leans against the limit block.

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