Capping head, spindle assembly, capping device, and capping system

Abstract

This invention provides a capping head, spindle assembly, capping device, and capping system that enable a compact and lightweight capping head, thereby increasing the capping processing speed and improving production efficiency. [Solution] The system comprises a body (1) centered on a central axis (O), a cam follower (4) that rolls on the outer surface of a cone cam (7), a forming roller (5) that moves radially in conjunction with the radial movement of the cam follower (4), and a biasing member (6) that biases the cam follower (4) and the forming roller (5) radially inward. The plurality of forming rollers (5) include a plurality of screw forming rollers (5A) and at least one hem-rolling roller (5B). The body (1) has a body recess (13) that is recessed downward from the upper surface (1a) of the body (1) and accommodates at least the lower end of the cone cam (7).

Claims

1. A capping head for attaching a top-cylindrical cap to the mouthpiece of a bottom-cylindrical, screw-on can, A body centered on a central axis extending in the vertical direction, A cam follower is positioned on the upper side of the body and rolls on the outer surface of the cone cam, A molding roller is positioned below the body, connected to the cam follower, and moves radially in conjunction with the radial movement of the cam follower. A biasing member that biases the cam follower and the molding roller radially inward, The system includes a support member that supports the cam follower and the molding roller, The cam followers are arranged in a plurality in the circumferential direction, The molding rollers are arranged in the same number as the cam followers and are provided in multiples in the circumferential direction. Multiple molding rollers, Multiple thread forming rollers are provided on the peripheral wall of the cap to form a threaded portion that screws into the mouthpiece portion, The cap includes at least one hem-rolling roller for forming a hem around the lower end of the peripheral wall of the cap onto the mouthpiece, The body has a recess that extends downward from the upper surface of the body and accommodates at least the lower end of the cone cam. The aforementioned support member is A support shaft extending in the vertical direction, An upper arm connecting the support shaft and the cam follower, It has a lower arm that connects the support shaft and the molding roller, The upper arm has an upper clamp portion that surrounds the support shaft around its axis and is deformable to press against the outer surface of the support shaft. The lower arm has a lower clamp portion that surrounds the support shaft around its axis and is deformable to press against the outer surface of the support shaft. At least one of the upper clamp portion and the lower clamp portion has a deformation assist groove that is arranged on the circumferential surface of the clamp portion and extends in the vertical direction. Capping head.

2. The lower arm has a stepped portion positioned on a surface facing radially inward. The capping head according to claim 1.

3. The inner diameter of the body recess is larger than the outer diameter of the lower end of the cone cam that contacts the cam follower. A capping head according to claim 1 or 2.

4. The body has a spindle mounting portion which is attached to a spindle inserted inside the cone cam, The spindle mounting portion is positioned at the bottom of the body recess, which has a bottomed hole shape. A capping head according to claim 1 or 2.

5. The inner diameter of the body recess is larger than the diameter of the spindle mounting portion. The capping head according to claim 4.

6. The vertical dimension of the cone cam from the upper end position to the lower end position where the cam follower makes contact is defined as the molding dimension H. The vertical depth dimension h of the body recess is 1.58H or less. A capping head according to claim 1 or 2.

7. The cam follower is, A shaft portion extending in the vertical direction, The rolling element is rotatably supported at the lower end of the shaft portion and is pressed against the outer surface of the cone cam by the biasing force of the biasing member, A capping head according to claim 1 or 2.

8. A pressure block is provided on the lower side of the body and presses against the top wall of the cap, A capping head according to claim 1 or 2.

9. The molding rollers are provided in six or more units. The number of screw forming rollers is greater than the number of hem rolling rollers. A capping head according to claim 1 or 2.

10. The aforementioned screw forming roller is provided in four units. Two of the aforementioned hem-rolling rollers are provided. The capping head according to claim 9.

11. The body has a spindle mounting portion which is attached to a spindle inserted inside the cone cam, The spindle mounting portion is positioned to overlap with the body recess when viewed from the radial direction. A capping head according to claim 1 or 2.

12. The number of biasing members is the same as the number of cam followers, and multiple members are provided arranged in the circumferential direction. The body has a biasing member housing hole that extends in the vertical direction, The number of biasing member housing holes is the same as the number of biasing members, and multiple holes are provided arranged in the circumferential direction. Each of the biasing members is housed in each of the biasing member housing holes. A capping head according to claim 1 or 2.

13. The number of biasing members is the same as the number of cam followers, and multiple members are provided arranged in the circumferential direction. The body has a concave pocket that is recessed radially inward from the outer circumferential surface of the body and extends vertically. The aforementioned pockets are provided in the same number as the biasing members, and are arranged in a plurality in the circumferential direction. Each of the biasing members is housed in each of the pockets, The body is provided with a cylindrical cover that surrounds it from the radially outer side to the entire circumference in the circumferential direction. A capping head according to claim 1 or 2.

14. The aforementioned body is made of aluminum alloy. A capping head according to claim 1 or 2.

15. A pressure block is provided on the lower side of the body and presses against the top wall of the cap, The body has a housing cylinder that protrudes downward from the lower surface of the body, A portion of the pressure block is housed in the aforementioned housing cylinder. A capping head according to claim 1 or 2.

16. A capping head according to claim 1 or 2, A lifting shaft extending in the vertical direction, to which a pressure block that presses against the top wall of the cap is attached, A spindle that is cylindrical in shape, has the lifting shaft inserted inside, and to which the body is attached, It comprises a cylindrical lifting cylinder into which the lifting shaft and the spindle are inserted, The lifting shaft has an upper cam follower that moves the lifting shaft in the vertical direction. The spindle has a spindle gear that rotates the spindle around the central axis, The aforementioned lifting cylinder is The cylindrical cone cam and The system includes a lower cam follower that moves the lifting cylinder in the vertical direction, Spindle assembly.

17. A turret that rotates around its axis, The spindle assembly according to claim 16, which is disposed on the outer circumference of the turret, A fixed gear that meshes with the spindle gear and extends around the turret shaft, An upper cam extending around the turret shaft and engaging with the upper cam follower, It comprises a lower cam extending around the turret axis and with which the lower cam follower engages, Capping device.

18. A filler for filling a screw-top can with its contents, The capping device according to claim 17, wherein the screw-top can discharged from the filler is supplied, The conveying direction of the screw-on cans discharged from the filler and heading toward the capping device extends along the tangent to the outer circumference of the turret when viewed from the turret axis direction. Capping system.

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