A capping head device for pre-screwing clamp and a capping method thereof

Abstract

The present invention discloses a pre-screwed capping head device, comprising a capping head device and a cap body to be screwed, wherein the side profile of the cap body is provided with anti-skid patterns; the capping head device comprises a plurality of clamping jaws, wherein the plurality of clamping jaws can cooperate to clamp on the side profile of the cap body; the clamping part of the clamping jaws has clamping patterns, and the shape of the clamping patterns matches the shape of the anti-skid patterns; the clamping jaws can rotate while performing the clamping action, so that the clamping patterns can gradually be inserted into the anti-skid patterns as the clamping jaws rotate, so as to straighten the cap body. A plurality of anti-skid grooves are formed on the anti-skid patterns, and the clamping patterns are composed of a plurality of racks, and the shape of the racks matches the shape of the anti-skid grooves; the racks have a certain elasticity, and when the racks are connected to the anti-skid patterns, the simultaneous rotation and clamping actions of the clamping jaws can make the racks adaptively inserted into the anti-skid grooves, so as to straighten the cap body. The present invention can prevent the cap body from being easily skewed after being screwed and sealed.

Description

Technical Field

[0001] The invention relates to the technical field of packaging machinery, in particular to a pre-screwing capping head device and a capping method thereof. Background Art

[0002] During the filling process of spray bottle products, the spray cap needs to be placed on the mouth of the spray bottle, and then the capping head device automatically screws and seals the spray cap. However, when the spray cap is placed on the mouth of the spray bottle, the spray cap is sometimes in a skewed state. At present, when screwing and sealing, the spray cap is generally clamped first and then rotated. These two steps are performed in sequence, and there is no process for adjusting the posture of the spray cap. This causes the spray cap that is finally screwed and sealed on the spray bottle to be skewed. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a pre-screwed capping head device and a capping method thereof, so that the cap body is not easily skewed after being screwed and sealed.

[0004] Technical solution: To achieve the above-mentioned purpose, a pre-screwed capping head device of the present invention comprises a capping head device and a cap body to be screwed, and the side profile of the cap body has anti-slip patterns; the capping head device comprises a plurality of clamping jaws, and the plurality of clamping jaws can cooperate to clamp on the side profile of the cap body; the clamping part of the clamping jaws has gripping patterns, and the shape of the gripping patterns matches the shape of the anti-slip patterns; the clamping jaws can rotate while performing the gripping action, so that the gripping patterns can gradually get stuck in the anti-slip patterns as the clamping jaws rotate, so as to straighten the cap body.

[0005] Furthermore, the capping head device includes an outer ring frame and an inner cam, a plurality of clamping claws are hingedly mounted on the outer ring frame, a plurality of sliding rods are also arranged on the outer ring frame, one end of the sliding rod is movably connected to the clamping claw, and the other end of the sliding rod is arranged with a contact block; the inner cam can actively rotate, a gradient arc surface is arranged on the wheel surface of the inner cam, and the contact block is connected with the gradient arc surface; when the contact block slides along the gradient arc surface, the sliding rod slides correspondingly, and pushes and pulls the clamping claw to open or clamp; there is a component force along the circumference of the inner cam between the contact block and the gradient arc surface, so that when the inner cam rotates, it can also drive the sliding rod on the outer ring frame to rotate, and then drive the clamping claw to rotate.

[0006] Furthermore, the upper end of the clamp is movably connected to the sliding rod, and the upper end of the clamp is inclined toward the outside of the outer ring frame; the lower end of the clamp is a clamping part, and the lower end of the clamp is inclined toward the center of the outer ring frame; under the action of gravity, the lower end of the clamp tends to droop, thereby prying the upper end of the clamp to push the sliding rod, so that the contact block remains in contact with the gradual arc surface.

[0007] Furthermore, a rod frame is provided on the outer ring frame, a sliding hole is provided on the rod frame, and the sliding rod is correspondingly arranged in the sliding hole; a latch is connected to one end of the sliding rod, and a slot is provided at the upper end of the clamping claw, and the latch is correspondingly inserted into the slot. When the sliding rod slides, the clamping claw is pushed and pulled by the latch.

[0008] Furthermore, a support frame is provided on the outer ring frame, and an annular support groove is formed on the support frame; an inner hole is opened on the inner cam, and the inner hole of the inner cam is correspondingly mounted on the annular support groove, so that the inner cam can rotate on the outer ring frame.

[0009] Furthermore, a limit block is also provided on the wheel surface of the inner cam, and when the contact block abuts against the limit block, the rotation of the inner cam can drive the clamping jaws to rotate synchronously.

[0010] Furthermore, a plurality of anti-slip grooves are formed on the anti-slip pattern, and the clamping pattern is composed of a plurality of racks, the shape of the racks matches the shape of the anti-slip grooves; the racks have a certain elasticity, and when the racks are connected to the anti-slip pattern, the simultaneous rotation and clamping action of the clamping jaws can make the racks adaptively fit into the anti-slip grooves to straighten the cover body.

[0011] Furthermore, a plurality of vertical anti-skid grooves are formed on the anti-skid pattern, and the gripping pattern is composed of a plurality of vertical racks.

[0012] Furthermore, the gradually changing arc surface of the inner cam is divided into a smooth section and a rough section in sequence along the direction of increasing outer diameter, and the limit block is located on the side of the rough section away from the smooth section; when the contact block is connected to the rough section, the top teeth of several racks on each clamping jaw are grouped to form a pre-clamping ring; on the cover body, the circle where the tops of several anti-skid grooves are located is the groove top circle, and the circle where the bottoms of several anti-skid grooves are located is the groove bottom circle; the diameter of the pre-clamping ring is smaller than the diameter of the groove top circle, but larger than the diameter of the groove bottom circle.

[0013] A capping method of a capping head device with a pre-screw clamp, in which an inner cam has a slow rotation stage and a fast rotation stage in sequence during the process of the capping head device screwing a cap body; in the slow rotation stage, the rotation speed of the inner cam is relatively low, so that a contact block and a rough section cannot overcome the friction force and move relative to each other; in the fast rotation stage, the rotation speed of the inner cam is relatively high, so that the contact block and the rough section can overcome the friction force and move relative to each other.

[0014] Beneficial effects: The capping head device of the pre-screwing clamp and the capping method thereof of the present invention have the following beneficial effects:

[0015] 1) The gripping pattern on the clamping jaws matches the anti-skid pattern on the side profile of the cover body; with the cooperation of the inner cam, the contact block and the sliding rod, when the inner cam rotates, the clamping jaws can be driven to grip and rotate at the same time, so that the gripping pattern can gradually fit into the anti-skid pattern as the clamping jaws rotate, so as to adjust the posture of the cover body, straighten the cover body, and prevent the cover body from tilting after being screwed on;

[0016] 2) The gradually changing arc surface of the inner cam is divided into smooth sections and rough sections in the direction of increasing outer diameter, so that the clamping jaws can remain in contact with the cover body but not clamped for a longer time, so that the cover body has a longer posture adjustment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the overall structure of the capping head device of the present invention;

[0018] Attached Figure 2 It is a schematic diagram of the various sections on the gradual arc surface of the inner cam. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] As attached Figures 1 to 2 The capping head device of the pre-screw clamp comprises a capping head device and a cap body 1 to be screwed, as shown in the attached Figure 1 In one embodiment shown in the figure, the cover body 1 is a spray cover, the spray cover is placed at the bottle mouth of the spray bottle 2, and the screw capping head device is used to screw the spray cover on the bottle mouth of the spray bottle 2.

[0021] There are anti-skid lines 3 on the side profile of the cover body 1. The capping head device includes a plurality of clamping jaws 4, which can cooperate to perform a clamping action, so that the plurality of clamping jaws 4 are clamped on the side profile of the cover body 1. The clamping part of the clamping jaws 4 has a clamping line 5, the shape of the clamping line 5 matches the shape of the anti-skid line 3, and the shape of the convex part on the clamping line 5 is consistent with the shape of the concave part on the anti-skid line 3. The clamping jaws 4 can rotate while performing the clamping action, so that the clamping line 5 can gradually get stuck in the anti-skid line 3 as the clamping jaws 4 rotate, so as to straighten the cover body 1.

[0022] In the existing capping head device, the clamping jaws 4 are generally used to clamp the cap 1 first, and then rotate the clamping jaws 4 to rotate the cap 1, that is, the clamping action and the rotating action of the clamping jaws 4 are performed sequentially, and there is no process of adjusting the posture of the cap 1. If the cap 1 is in a skewed state when placed on the bottle body, then when the clamping jaws 4 directly clamp the cap 1, the cap 1 is still likely to be in a skewed state, and finally the cap 1 is also in a skewed state when it is screwed on the bottle body.

[0023] The shape of the gripping lines 5 on the clamping jaws 4 matches the shape of the anti-skid lines 3 on the cover 1. If the clamping jaws 4 directly clamp the cover 1, the gripping lines 5 may not be able to fit into the anti-skid lines 3. However, in the present invention, the clamping jaws 4 rotate while gripping. The clamping jaws 4 do not grip the cover 1 during the gripping process. Therefore, when the clamping jaws 4 rotate, the gripping lines 5 and the anti-skid lines 3 will have a process of mutual adaptation and adjustment, thereby adjusting the posture of the cover 1 and straightening the cover 1.

[0024] Specifically, as attached Figure 1 As shown in , the capping head device includes an outer ring frame 6 and an inner cam 7, and a plurality of clamping jaws 4 are hingedly mounted on the outer ring frame 6, and a plurality of clamping jaws 4 are circumferentially distributed on the outer ring frame 6. The clamping jaws 4 can swing up and down on the outer ring frame 6, thereby performing an opening action or a clamping action. A plurality of sliding rods 8 are also arranged on the outer ring frame 6, one end of the sliding rod 8 is movably connected to the clamping jaw 4, and the other end of the sliding rod 8 is provided with a contact block 9. The inner cam 7 can rotate actively, and a gradual arc surface 10 is arranged on the wheel surface of the side of the inner cam 7, and the outer diameter of the gradual arc surface 10 gradually increases along the circumference of the inner cam 7. The contact block 9 contacts the gradual arc surface 10. When the contact block 9 slides along the surface of the gradual arc surface 10, the contact block 9 will drive the sliding rod 8 to slide accordingly, and when the sliding rod 8 slides, it will push and pull the clamping jaw 4 to perform an opening or clamping action.

[0025] In addition, the junction between the contact block 9 and the gradually changing arc surface 10 is arc-shaped, so there must be a component force between the contact block 9 and the gradually changing arc surface 10 along the circumferential direction of the inner cam 7. Under the influence of this component force, when the inner cam 7 rotates, the sliding rod 8 can also be driven to rotate through the contact block 9. Since the sliding rod 8 and the clamping jaw 4 are both installed on the outer ring frame 6, when the sliding rod 8 rotates, the clamping jaw 4 can also be driven to rotate through the outer ring frame 6. In summary, through the mutual cooperation of the contact block 9, the sliding rod 8 and the gradually changing arc surface 10 on the inner cam 7, the clamping jaw 4 can be rotated while performing the clamping action.

[0026] The upper end of the clamping jaw 4 is movably connected to the sliding rod 8, and the upper end of the clamping jaw 4 is inclined toward the outside of the outer ring frame 6; the lower end of the clamping jaw 4 is a gripping part, that is, the lower end of the clamping jaw 4 has a gripping pattern 5, and the lower end of the clamping jaw 4 is inclined toward the center of the outer ring frame 6. Under the action of gravity, the lower end of the clamping jaw 4 has a tendency to sag, that is, the lower end of the clamping jaw 4 has a tendency to swing toward the outside of the outer ring frame 6, and the movement trend of the lower end of the clamping jaw 4 will pry the upper end of the clamping jaw 4, so that the upper end of the clamping jaw 4 pushes the sliding rod 8, and then the contact block 9 and the gradual arc surface 10 keep in contact with each other.

[0027] The outer ring frame 6 is provided with a rod frame 11, and a transverse sliding hole is provided on the rod frame 11. The sliding rod 8 is correspondingly arranged in the sliding hole, so that the sliding rod 8 can slide in the sliding hole. A latch 12 is connected to one end of the sliding rod 8, and a slot 13 is provided at the upper end of the clamping jaw 4. The latch 12 is correspondingly inserted into the slot 13. When the sliding rod 8 slides, the clamping jaw 4 is pushed and pulled by the latch 12, so that the clamping jaw 4 swings, and then a plurality of clamping jaws 4 cooperate to perform a clamping action.

[0028] The outer ring frame 6 is provided with a support frame 14, and an annular support groove is formed on the support frame 14. The inner cam 7 is provided with an inner hole 16, and the inner hole 16 of the inner cam 7 is correspondingly supported on the annular support groove, so that the inner cam 7 can rotate on the outer ring frame 6.

[0029] A limit block 17 is also provided on the wheel surface of the inner cam 7, and the limit block 17 is located on one side of the gradual arc surface 10. The contact block 9 can slide along the gradual arc surface 10 to abut against the limit block 17. When the contact block 9 abuts against the limit block 17, the rotation of the inner cam 7 can drive the clamping jaw 4 to rotate synchronously.

[0030] The anti-skid pattern 3 is formed with a plurality of anti-skid grooves, and the gripping pattern 5 is composed of a plurality of racks, the shape of which matches the shape of the anti-skid grooves, so that the racks can be correspondingly inserted into the anti-skid grooves. The racks have a certain elasticity, so the racks have a certain deformation ability. When the racks are connected to the anti-skid pattern 3, the simultaneous rotation and gripping actions of the clamping jaws 4 can cause the racks to deform to a certain extent, and adaptively insert into the anti-skid grooves, thereby straightening the cover body 1.

[0031] In one embodiment, a plurality of vertical anti-skid grooves are formed on the anti-skid pattern 3, and the gripping pattern 5 is composed of a plurality of vertical racks.

[0032] As attached Figure 2 As shown in the figure, the gradual arc surface 10 of the inner cam 7 is divided into a smooth section 18 and a rough section 15 in the direction of increasing outer diameter, and the limit block 17 is located on the side of the rough section 15 away from the smooth section 18. When the contact block 9 is in contact with the smooth section 18, the friction between the two is very small, but because there is a force between the contact block 9 and the smooth section 18 along the circumferential direction of the inner cam 7, when the contact block 9 slides on the smooth section 18, it can also drive the clamping jaw 4 to rotate, so that the clamping jaw 4 performs the clamping and rotating actions at the same time.

[0033] When the contact block 9 is connected to the rough section 15, the top teeth of several racks on each clamping jaw 4 are grouped to form a pre-clamping ring. On the cover body 1, the circle where the tops of several anti-skid grooves are located is the groove top circle, and the circle where the bottoms of several anti-skid grooves are located is the groove bottom circle. Then when the contact block 9 is connected to the rough section 15, the diameter of the pre-clamping ring is smaller than the diameter of the groove top circle, and the diameter of the pre-clamping ring is larger than the diameter of the groove bottom circle. In other words, when the contact block 9 is connected to the rough section 15, the rack is connected to the anti-skid pattern 3 on the cover body 1, but the clamping jaw 4 does not completely clamp the cover body 1. In this state, the rack can gradually adapt and get stuck in the anti-skid groove, thereby adjusting the posture of the cover body 1 to prevent the cover body 1 from tilting when the clamping jaw 4 clamps the cover body 1.

[0034] The present invention also provides a capping method of a capping head device with a pre-screw clamp. During the process of the capping head device screwing the cap body 1, the inner cam 7 has a slow rotation stage and a fast rotation stage which are performed in sequence.

[0035] In the slow rotation stage, the rotation speed of the inner cam 7 is relatively low, and the contact block 9 first slides along the smooth section 18 on the gradient arc surface 10. At this time, the clamping jaw 4 rotates while clamping, and the posture of the skewed cover body 1 can be adjusted. When the contact block 9 reaches the boundary between the smooth section 18 and the rough section 15, since the rotation speed of the inner cam 7 is relatively low, the contact block 9 and the rough section 15 are not sufficient to overcome the friction and move relative to each other. At this time, the rack is connected to the anti-skid pattern 3 on the cover body 1, and the clamping jaw 4 does not completely clamp the cover body 1. Then the inner cam 7 continues to rotate, and the clamping jaw 4 is driven to rotate, and the clamping jaw 4 maintains a state of contacting the cover body 1 but not clamping the cover body 1. In this state, it can be ensured that the rack is adaptively inserted into the anti-skid groove to straighten the cover body 1.

[0036] In the fast rotation stage, the rotation speed of the inner cam 7 is relatively high, so that the contact block 9 and the rough section 15 can overcome the friction and move relative to each other, so that the contact block 9 slides over the rough section 15, and then the contact block 9 abuts against the limit block 17. At this time, the clamping jaw 4 clamps the cover body 1, and the rotation of the inner cam 7 can drive the clamping jaw 4 to rotate synchronously, thereby tightening the cover body 1.

[0037] One working mode of the present invention is as follows: the outer ring frame 6 is installed on a frame, the frame has a circular hole, the edge of the circular hole has an annular groove, and the outer ring frame 6 is rotatably arranged in the annular groove. A lifting mechanism is arranged below the outer ring frame 6. After the cover body 1 is placed on the spray bottle 2, the lifting mechanism drives the spray bottle 2 to rise, so that the cover body 1 rises between the clamps 4, and then the inner cam 7 rotates forward, and the inner cam 7 successively passes through the slow rotation stage and the fast rotation stage, so that the clamps 4 rotate while clamping, adjust the posture of the cover body 1, and clamp the cover body 1; then the inner cam 7 continues to rotate, cooperates with the lifting mechanism to rise slightly, and screws the cover body 1 on the spray bottle 2; then the inner cam 7 rotates in a faster direction, and under the action of inertia, the contact block 9 slides over the rough section 15 and returns to the smooth section 18, so that the clamps 4 loosen the cover body 1, and the lifting mechanism moves down, so that the spray bottle 2 with the cover body 1 screwed is separated from the capping head device.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A capping head device for a pre-screw clamp, characterized in that: The invention comprises a capping head device and a cap body (1) to be screwed, wherein the side profile of the cap body (1) is provided with anti-skid patterns (3); the capping head device comprises a plurality of clamping jaws (4), wherein the plurality of clamping jaws (4) can cooperate to clamp on the side profile of the cap body (1); the clamping portion of the clamping jaws (4) is provided with clamping patterns (5), wherein the shape of the clamping patterns (5) matches the shape of the anti-skid patterns (3); the clamping jaws (4) can rotate while performing the clamping action, so that the clamping patterns (5) can gradually be inserted into the anti-skid patterns (3) as the clamping jaws (4) rotate, thereby straightening the cap body (1).

2. A capping head device for a pre-screw clamp according to claim 1, characterized in that: The capping head device comprises an outer ring frame (6) and an inner cam (7), a plurality of clamping claws (4) are hingedly mounted on the outer ring frame (6), a plurality of sliding rods (8) are also arranged on the outer ring frame (6), one end of the sliding rod (8) is movably connected to the clamping claw (4), and the other end of the sliding rod (8) is provided with a contact block (9); The inner cam (7) can actively rotate, and a gradually changing arc surface (10) is arranged on the wheel surface of the inner cam (7), and the contact block (9) is connected with the gradually changing arc surface (10); when the contact block (9) slides along the gradually changing arc surface (10), the sliding rod (8) slides correspondingly, and pushes and pulls the clamping jaw (4) to perform an opening or clamping action; there is a component force along the circumference of the inner cam (7) between the contact block (9) and the gradually changing arc surface (10), so that when the inner cam (7) rotates, it can also drive the sliding rod (8) on the outer ring frame (6) to rotate, thereby driving the clamping jaw (4) to rotate.

3. A capping head device for a pre-screw clamp according to claim 2, characterized in that: The upper end of the clamping jaw (4) is movably connected to the sliding rod (8), and the upper end of the clamping jaw (4) is inclined toward the outer side of the outer ring frame (6); the lower end of the clamping jaw (4) is a clamping portion, and the lower end of the clamping jaw (4) is inclined toward the center of the outer ring frame (6); under the action of gravity, the lower end of the clamping jaw (4) tends to droop, thereby prying the upper end of the clamping jaw (4) to push the sliding rod (8), so that the contact block (9) and the gradual arc surface (10) remain in contact.

4. The capping head device for pre-screwing clamp according to claim 2, characterized in that: The outer ring frame (6) is provided with a rod frame (11), and a sliding hole is provided on the rod frame (11), and the sliding rod (8) is correspondingly arranged in the sliding hole; one end of the sliding rod (8) is connected with a latch (12), and the upper end of the clamping jaw (4) is provided with a slot (13), and the latch (12) is correspondingly inserted into the slot (13), and when the sliding rod (8) slides, the clamping jaw (4) is pushed and pulled by the latch (12).

5. The capping head device for pre-screwing clamp according to claim 2, characterized in that: The outer ring frame (6) is provided with a support frame (14), and an annular support groove is formed on the support frame (14); the inner cam (7) is provided with an inner hole (16), and the inner hole (16) of the inner cam (7) is correspondingly mounted on the annular support groove, so that the inner cam (7) can rotate on the outer ring frame (6).

6. The capping head device for pre-screwing clamp according to claim 2, characterized in that: A limit block (17) is also provided on the wheel surface of the inner cam (7). When the contact block (9) abuts against the limit block (17), the rotation of the inner cam (7) can drive the clamping jaw (4) to rotate synchronously.

7. A capping head device for a pre-screw clamp according to claim 6, characterized in that: A plurality of anti-skid grooves are formed on the anti-skid pattern (3); the clamping pattern (5) is composed of a plurality of racks, the shape of the racks matches the shape of the anti-skid grooves; the racks have a certain elasticity, and when the racks are in contact with the anti-skid pattern (3), the simultaneous rotation and clamping actions of the clamping jaws (4) can enable the racks to adaptively fit into the anti-skid grooves to straighten the cover body (1).

8. The capping head device for pre-screwing clamp according to claim 7, characterized in that: The anti-skid pattern (3) is formed with a plurality of vertical anti-skid grooves, and the gripping pattern (5) is composed of a plurality of vertical racks.

9. A capping head device for a pre-screw clamp according to claim 8, characterized in that: The gradually changing arc surface (10) of the inner cam (7) is divided into a smooth section (18) and a rough section (15) in sequence along the direction of increasing outer diameter, and the limit block (17) is located on a side of the rough section (15) away from the smooth section (18); When the contact block (9) is connected to the rough section (15), the top teeth of the plurality of racks on each clamping jaw (4) are grouped to form a pre-clamping ring; on the cover body (1), the circle where the tops of the plurality of anti-skid grooves are located is the groove top circle, and the circle where the bottoms of the plurality of anti-skid grooves are located is the groove bottom circle; the diameter of the pre-clamping ring is smaller than the diameter of the groove top circle, but larger than the diameter of the groove bottom circle.

10. A capping method for a capping head device with a pre-screw clamp according to claim 9, characterized in that: In the process of the capping head device screwing the cap body (1), the inner cam (7) has a slow rotation stage and a fast rotation stage in sequence; in the slow rotation stage, the rotation speed of the inner cam (7) is relatively low, so that the contact block (9) and the rough section (15) are insufficient to overcome the friction force and move relative to each other; in the fast rotation stage, the rotation speed of the inner cam (7) is relatively high, so that the contact block (9) and the rough section (15) can overcome the friction force and move relative to each other.

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