JP3499897B2 - Cap sealing head - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a cup-shaped material made of a metal plate such as aluminum over a container having a screw groove on an upper outer peripheral surface thereof into a screw cap. And a cap sealing head for fastening a cap to a container opening. Conventionally, a cap sealer having a supporting body, a sealing head supporting means mounted on the supporting body, and a sealing head mounted on the supporting body has been put to practical use. The sealing head support means,
A center shaft fixed to the support body and a rotating member mounted around the center shaft are provided. The central shaft body moves up and down integrally with the support body, and the rotating member is rotatable relative to the central shaft body and moves up and down integrally with the central shaft body. The sealing head includes a mounting portion, a pressing central shaft member for preventing relative rotation of the cap fitted on the mouth and neck of the container, a screw forming roller for folding the cap onto the mouth and neck of the container, and a folding roller. It has a cap sealer mechanism with a curved roller and a cam for moving these to the cap. The pressing center shaft member is connected to the center shaft body of the sealing head support means and has a fixed rotation direction, and the sealing mechanism is rotatable relative to the center shaft member, and It rotates in connection with the rotating member. Both the central shaft member and the sealing mechanism move up and down integrally with the sealing head supporting means. FIG. 6 shows a conventional example of this cap sealer.
When described on the basis of, the support body 2, the tool support means 4 mounted on the support body 2, and the tool means 6 are provided. The tool supporting means 4 has a center shaft 8 extending in the vertical direction and a rotating member 10 rotatable relative to the center shaft 8. The support housing 2 includes a bearing housing 1
2, an elongated cylindrical rotating member 10 is rotatably supported inside a bearing housing 12 via a bearing member 14. A transmission pulley 18 is attached to one end of the rotating member 10, that is, an upper end by a fixing member 16, and a key member 20 is interposed between the transmission pulley 18 and the rotating member 10, and the transmission pulley 18 and the rotating member 10 Rotates as one body. The central shaft body 8 is disposed inside the rotating member 10, and its both ends, that is, the upper end and the lower end, are provided on the bearing member 22.
And is rotatably supported by the rotating member 10 via the. The upper end of the center shaft 8 is fixed to an L-shaped member 26 by a nut 24, and the other end of the L-shaped member 26 is attached to the upper end of the bearing housing 12. In a specific example,
A cap member 28 is mounted on the lower end surface of the bearing housing 12, and spacer members 30 and 3 are provided between the bearing member 14 and between the bearing member 14 and the transmission pulley 18, respectively.
2 is interposed. Further, spacer members 34 and 36 are interposed between the pair of bearing members 22 and between the bearing member 22 and the L-shaped member 26, respectively. In the tool support means 4 as described above, when the support main body 2 moves up and down by a mechanism not shown, the center shaft 8 and the rotating member 10 also move up and down integrally with the support main body 2. Support body 2
Does not rotate around an axis extending in the up-down direction, so that when the transmission pulley 18 is rotated in a predetermined direction by a transmission member (not shown) such as a transmission belt, the rotating member 1 is rotated.
0 rotates relative to the support body 2 and the central shaft body 8 in the predetermined direction. The tool means 6 includes a pressing tool means 38 and a tightening tool means 40. The pressing tool means 38 has a center shaft member 42 and a pressing tool 44, and one end of the shaft member 42, that is, the upper end, rotates integrally with the other end of the center shaft body 8 of the tool supporting means 4, that is, the lower end. It is attached so that it does.
The pressing tool 44 is mounted on the other end of the central shaft member 42, that is, on the lower end, and has a recess having a shape substantially corresponding to a top wall (not shown) of a lid fitted on the mouth and neck of the container. Is formed. Further, the tightening tool means 40 has a pair of bending rollers (skirt rollers) 46 and a pair of thread forming rollers (thread rollers) 48, which are disposed at substantially 90-degree intervals. . In a specific example, a sleeve-shaped cylindrical shaft member 50 is provided outside the central shaft member 42, and both ends of the central shaft member 42 are rotatably supported by the cylindrical member 50 via bearing members 52. Cylindrical shaft member 5
0, a member 54 is fixed.
6, a swing lever 58 is swingably mounted, and a bending roller 46 and a thread forming roller 48 are rotatably mounted on the lower ends of the swing levers 58 via sleeve members 60, respectively. (The bending roller 46 is attached to the two opposing swing levers 58, and the thread forming roller 48 is attached to the remaining two swing levers 58). The bending roller 46 and the thread forming roller 48 are held at the positions shown in FIG. 6 by the biasing action of the coil spring 62, but may move downward from the above positions against the biasing action of the coil spring 62. it can. The tool means 6 further moves the folding roller 46 and the thread forming roller 48 inward in the radial direction, that is, acts on the folding roller 46 and the thread forming roller 48 against the skirt wall of the lid fitted on the container. An actuating mechanism 64 is included. The illustrated operating mechanism 64 includes a cylindrical cam member 66 and the cylindrical cam member 6.
6 is provided with a driven roller 68 which cooperates with the driven roller 6. The cylindrical cam member 66 is formed of a sleeve-like member,
The cylindrical cam member 66 and the cylindrical shaft member 50
And a key member 70 is interposed therebetween. Cam portions are provided on the outer peripheral surface of the cylindrical cam member 66 at intervals of substantially 90 degrees. On the other hand, the driven rollers 68 are rotatably mounted via a short axis to an operation arm 72 rotatably mounted on the shaft member 56, and each driven roller 68 comes into contact with a corresponding cam portion of the cylindrical cam member 66. The cylindrical cam member 66, the cylindrical shaft member 50, and the center shaft member 42 (further, the member 54 and the swing arm 58) are relatively vertically movable,
When the cylindrical shaft member 50 and the center shaft member 42 move relatively upward with respect to the cylindrical cam member 66, the swing lever 58 swings inward by the cam portion of the cylindrical cam member 66 via the driven roller 68 and the operating arm 72. The folding roller 46 and the thread forming roller 48 move inward. A biased compression spring 76 is placed between the operation arm 72 and the swing lever 58, and an adjustment bolt 82 and an adjustment nut 78 maintain a gap between the operation arm 72 and the swing lever 58. As described above, in the tool means 6, the center shaft member 4
2 is connected to the center shaft 8 of the tool support means 4, and the cylindrical cam member 66 is connected to the rotating member 10 of the tool support means 4. When the lid fitted on the mouth and neck of the container is closed, the transmission pulley 18 is rotated in a predetermined direction, whereby the rotating member 10 of the tool supporting means 4, the cylindrical cam member 66 of the tool means 6, and the cylindrical shaft The member 50, the member 54, the swing lever 58 (the mounted operation arm 72 and the driven roller 68), the bending roller 46, and the thread forming roller 48 are rotated in the predetermined direction. Then, in such a state, the support main body 2 (the tool support means 4 and the tool means 6 as well) move downward. When the support main body 2 is lowered, first, the pressing tool 44 of the pressing tool means 38 comes into contact with the peripheral edge of the top wall of the lid (not shown) fitted on the mouth and neck of the container, and this lid is placed on the container. Press on the mouth and neck. When the pressing tool 44 abuts, the center shaft member 42, the center shaft body 8,
Through the L-shaped member 26, the bearing housing 12 and the whole support 2, relative rotation of the lid with respect to the container is reliably prevented. When the support main body 2 is further lowered after the pressing tool 44 abuts as described above, the lowering of the pressing tool 44 is prevented by the container (not shown), so that spring means (not shown) is used.
The pressing tool means 38, that is, the pressing tool 4
4 and the central shaft member 42 are other components (the tool supporting means 4).
And move upward relative to the clamping tool means 40). Thus, the cam portions provided on the cylindrical cam member 66 act on the corresponding driven rollers 68, and the swing lever 58 pivots inward via the driven rollers 68 and the operating arm 72. Thus, the folding roller 46 is tilted in the radial direction, and the lower end of the skirt wall of the lid is bent inward in the radial direction to be locked on the locking jaw (not shown) formed on the mouth and neck of the container. . At the same time, the spiral forming roller 48
Is tilted inward in the radial direction and acts on the main part of the skirt wall of the lid to form an external thread on the main part of the skirt wall corresponding to the external thread formed on the mouth and neck of the container. Adjustment of the gap between the lid and the spiral forming roller 48 or the bending roller 46 is performed by an adjusting bolt 82 and an adjusting nut 78, and adjustment of the spring force for pressing the spiral forming roller 48 and the bending roller 46 is performed by turning a spring adjusting bolt 74. Thus, the urging force of the compression spring 76 is adjusted. In the above-mentioned prior art, many components are incorporated into a screw forming roller 48 for fastening the lid to the mouth and neck of the container and a swing lever 58 supporting the bending roller 46. The structure is complicated and expensive. Adjustment of the gap between the lid and the spiral forming roller 48 or the bending roller 46 is performed by an adjusting bolt 82 and an adjusting nut 78, and adjustment of the spring force for pressing the spiral forming roller 48 and the bending roller 46 is performed by turning a spring adjusting bolt 74. Although the biasing force of the compression spring 76 is adjusted by adjusting the gap, the biasing force of the compression spring 76 also changes when the gap is adjusted. Therefore, the biasing force of the compression spring 76 must be adjusted. Therefore, adjustment is complicated, and reproducibility is difficult. The present invention has been developed to address such a problem, and has as its object to facilitate the adjustment of the screw forming roller and the bending roller. The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 to 5 corresponding to the embodiment. A central shaft body 8 fixed to the support main body 2 and rising and lowering integrally with the support main body, and a rotating member 10 rotatably fitted to the outer periphery of the central shaft body 8 and supported by the support main body 2; A cylindrical cam member 66 coupled to the rotating member 10;
A cylindrical shaft member 50 supported vertically up and down inside the cylindrical shaft member 50, and is fitted into the cylindrical shaft member 50 to be vertically movably engaged with the central shaft body 8 and covered with the mouth and neck of the container. A pressing central shaft member 42 for preventing relative rotation of the cap; and a swing lever pivotally supported by the cylindrical shaft member 50 and abutting against a cam portion of the cylindrical cam member 66 via a driven roller 68 to swing. And a screw forming roller 4 which is supported by the swing lever 58 so as to be vertically movable and tightens the cap to the mouth and neck of the container.
8 and a bending roller 46, a leaf spring lever 81 whose length is adjustable in the vertical direction is attached to the swing lever 58, and the thread forming roller 48 and the bending roller 48 are bent through the leaf spring lever 81. Roller 4
6, and the driven roller 68 is supported on the swing lever 58 via an adjustable eccentric shaft 53. According to the present invention, in the cap sealing step by the above means, the transmission pulley 18 is driven to rotate in a predetermined direction, whereby the rotary member 10 of the sealing head supporting means 4 and the cylindrical cam member of the sealing head 11 are rotated. 6
6, a cylindrical shaft member 50 whose rotation direction is restricted by the cylindrical cam member 66, a swing lever 58 and a driven roller 68 attached to the cylindrical shaft member 50, and a leaf spring lever 81 attached to the swing lever 58. , The screw forming roller 48 and the bending roller 4 provided at the lower end of the leaf spring lever 81.
6 are simultaneously driven to rotate in the predetermined direction. In this state, when the sealing head supporting means 4 supported by the vertically movable support body 2 descends, the rotation direction is restricted by the center shaft 8 fixed to the support body 2 and the rotation is relatively stopped. Cap holder 75 at lower end of center shaft member 42
However, the central shaft member 42 contacts the upper surface of the untightened cap 39 placed on the container 37, and the center shaft member 42 faces downward via the thrust bearing 69 by the urging force of the four compression springs 55 guided by the head bolts 49. , And the container 37 is also relatively stopped in rotation, so that the relative rotation of the cap 39 with respect to the rotating portion of the sealing head 11 is reliably prevented. The subsequent lowering stroke of the sealing head 11 lowers the cam below the cylindrical cam member 66 in the rotating state, and the pin is fixed to the desk block 47a of the cylindrical shaft member in the synchronous rotating state but not lowering. The driven roller 68 of the moving lever 58 is pushed to incline the swinging lever 58 and the leaf spring lever 81, and the screw forming roller 48 and the bending roller 46 provided at the lower end of the leaf spring lever 81 are placed inside as shown in FIG. To perform the tightening operation. That is, the thread forming roller 48 acts on the peripheral wall of the cap 39 and forms a female screw on the peripheral wall of the cap 39 corresponding to the male screw formed on the mouth and neck of the container 37. At the same time, the bending roller 46 acts on the lower end of the skirt of the cap 39,
The lower end of the skirt is bent inward and locked on the locking jaw formed on the mouth and neck of the container 37. Screw forming roller 4
8 and the leaf spring lever 81 for operating the bending roller 46
Since it has flexibility in the moving direction, it is possible to cope with a dimensional error of the container mouth and neck. After the sealing head 11 is rotated by a predetermined angle and the sealing operation is completed, the cam of the cylindrical cam member 66 is separated from the driven roller 68 of the swing lever 58 by the raising of the support main body 2 and folded with the thread forming roller 48. The curving roller 46 moves outward, and the supporting body 2 further moves up to complete one sealing step, discharge the container 37, and move to the next step. When it is desired to adjust the distance between the thread forming roller 48, the bending roller 46 and the cap 39 from the center line of the sealing head 11, the amount of eccentricity of the eccentric shaft 53 is adjusted. Also, if you want to change the capping pressing force (see Fig. 3)
Loosen the bolt 89, move the adjustment plate 87 along the long hole,
Change the effective length of the leaf spring of the leaf spring lever 81 and the bolt 89
Tighten. Since the stopper bolt 85 is placed with a preload at the stop position of the leaf spring lever 81, the screw forming roller 4
8, and the position of the bending roller 46 and the capping pressing force can be adjusted independently, so that the adjustment is easy and the reproducibility is sufficient. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.
And a sealing head supporting means 4 mounted on the support body 2 and a sealing head 11 attached to these. The sealing head supporting means 4 fixedly supported by the vertically movable supporting body 2 is basically the same as that described in the example of the prior art, so the part names, part numbers, and the like are used. The sealing head supporting means 4 has a center shaft 8 extending in the vertical direction and a rotating member 10 which is rotatable relative to the center shaft 8. Support body 2
A bearing housing 12 is attached to the, and an elongated tubular rotating member 10 is rotatably supported inside the bearing housing 12 via a bearing 14. A transmission pulley 18 is mounted on an upper end of the rotating member 10 by a nut 16. A key 2 is provided between the transmission pulley 18 and the rotating member 10.
0 intervenes and both rotate together. The central shaft body 8 is disposed inside the rotating member 10, and the upper end and the lower end of the
2 rotatably supported by the rotating member 10.
The upper end of the central shaft 8 is L-shaped member 26 by a nut 24.
, And the other end of the L-shaped member 26 is attached to the upper end of the bearing housing 12. Bearing housing 12
A cap member 28 is mounted on the lower end surface of the
4, and between the bearing 14 and the transmission pulley 18 are spacers 30 and 32, respectively. Further, spacer members 34 and 36 are interposed between the pair of bearings 22 and between the bearing 22 and the L-shaped member 26, respectively.
As described above, the sealing head supporting means 4 includes the supporting body 2.
Is moved up and down by a mechanism not shown,
The center shaft 8 and the rotating member 10 also move up and down. The support main body 2 is not driven to rotate about an axis extending in the vertical direction. Therefore, when the transmission pulley 18 is driven to rotate in a predetermined direction by a transmission member (not shown) such as a transmission belt, the rotation member 10 is rotated. It rotates in the predetermined direction relative to the support body 2 and the central shaft body 8. A bush 41 having a square hole is fixedly provided at a lower end of the central shaft body 8. Reference numeral 11 denotes a sealing head. When the sealing head 11 is directly connected to the rotating member 10 of the sealing head supporting means 4, the sealing head 11 moves up and down relatively inside the cylindrical cam member 66. And a sealing roll mechanism having a slidable structure. The cylindrical cam member 66 has a male screw 66a at an upper portion thereof, and is screwed with a female screw of the sealing head coupling nut 43, so that the cylindrical cam member 66 can be easily attached to and detached from the rotating member 10. The key 35 is interposed between the coupled cylindrical cam member 66 and the rotating member 10, and both rotate integrally. Four headed bolts 49 are vertically movably disposed so as to penetrate through equally-disposed holes in the upper disk portion of the cylindrical cam member 66, and the lower ends of the headed bolts 49 are located at the lower part of the cylindrical shaft member 50 Support the desk block 50a. Further, a compression spring 55 urged by a headed bolt 49 between the upper disk portion of the cylindrical cam member 66 and the desk block 50a is provided as an exterior. A cam is formed on the outer cylinder of the cylindrical cam member 66. A cylindrical shaft member 50, which is a sliding member of a sealing roll mechanism that slides in the cylindrical cam member 66, is fitted inside the cylindrical cam member 66 so as to be slidable up and down. It always rotates with the cylindrical cam member 66. The central shaft member 42 is inserted into the hollow through hole of the cylindrical shaft member 50.
Are fitted and supported on the cylindrical shaft member 50 via bearings 65 and 53 and a thrust bearing 69. The center shaft member 42 has a square shaft at the upper end, and this square shaft is fitted into a square hole of the bush 41 at the lower end of the center shaft body 8 of the sealing head supporting means 4 so as to be able to slide vertically. I do. A cap holder 75 is attached to the lower end of the center shaft member 42. The desk block 50a
As shown in FIG. 2, there are four notched grooves evenly distributed on the circumference, into which the swing lever 58 is inserted, and the horizontal pin 83 is inserted.
To be rotatably supported. A driven roller 68 enters into a notch groove provided at the upper part of the swing lever 58, and is rotatably supported by an eccentric shaft 53 as shown in the sectional view of FIG. The driven roller 68 is controlled by the eccentric amount e of the eccentric shaft 53.
Is changed, and the swing lever 58 can adjust the relative position with respect to the cylindrical cam member within the range of 2e. A leaf spring lever 81 is attached to each of the swing levers 58 (see FIG. 3). An adjusting plate 87 is mounted on the mounting positions of the two by bolts 89, and the adjusting plate 87 is
The position can be adjusted by 7a. A stopper bolt 85 for applying a preload to the spring force at a position where the leaf spring lever 81 stops is provided at a position where each swing lever 58 contacts an intermediate portion of the leaf spring lever 81. Further, a tension spring 103 is hung on the upper end of each swing lever 58 so as to attract each other to the adjacent swing lever 58. A support block 91 is fixed to the lower ends of a pair of leaf spring levers 81 opposed to the center axis of the sealing head 11, and the thread forming roller 48 is rotatably mounted on a sleeve 97 screwed with the support block 91. . A support block 91 is similarly fixed to the lower ends of the pair of opposing leaf spring levers 81 at a position turned 90 degrees with respect to the pair of leaf spring levers 81, and a sleeve 99 screwed with the support block 91. , A bending roller 46 is rotatably mounted. Screw forming roller 48 and bending roller 46
Has a coil spring 101 interposed between the sleeve 97 and the sleeve 99, respectively, and is held at a position shown in the figure by the urging force of the coil spring 101. You can move. As shown in FIG.
3 is attached to the swing lever 58 with a set screw while adjusting the eccentric angle. If the eccentric shaft 53 is extended outward, the driven roller 68 is pushed by the cam of the cylindrical cam member 66 and moves more, so that the working force of the thread forming roller 48 and the bending roller 46 can be increased. A detection shaft 73 is slidably fitted in an elongated hole formed in the lower end of the center shaft member 42. Detection axis 73
A horizontal pin 79 is inserted in the middle of the pin, and the pin 79 passes through an elongated hole of the central shaft member 42 and is fixed by a ring 77. If the container 37 is covered with the untightened cap 37 in the cap sealing step, the detection shaft 73 is pushed up to the position shown in FIG. The support block 91 and the thread forming roller 48 and the bending roller 46 supported by the support block 91 can move inward and can enter the cap sealing operation without any trouble. If not, neither the detection shaft 73 nor the ring 77 rises, the support block 91 at the lower end of the leaf spring lever 81 stops by hitting a bearing built into the ring 77, the leaf spring lever 81 bends, and the thread forming roller 48 and the bending roller 46 No direct contact with 37 mouth and neck. Reference numeral 67 denotes a guide ring for centering the mouth and neck of the container. The guide ring 67 is attached to the tip of an extension bolt 105 provided at the lower end of the headed bolt 49. As described above, according to the present invention, the swing which is supported by the cylindrical shaft member which is vertically movably supported in the cylindrical cam member and which swings by contacting the cam of the cylindrical cam member. The lever is provided with a leaf spring lever whose length can be adjusted in the vertical direction, and supports the thread forming roller and the bending roller supported by the swing lever via the leaf spring lever. On the other hand, since the lever has flexibility, the operating range of the lever is flexible, it can cope with variations in the dimensions of the container mouth and neck, and the adjusting pressure can be adjusted independently by changing the effective length of the leaf spring. The driven roller, which makes the swinging lever contact the cam of the cylindrical cam member, is supported by the swinging lever via an adjustable eccentric shaft. The distance between the forming roller and the bending roller from the cap is adjusted, and the adjustment is facilitated.

[Brief description of the drawings] FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a side view as viewed in the direction of arrow B in FIG. 1; FIG. 4 is a sectional view taken along line CC of FIG. 2; FIG. 5 is a cross-sectional view at the time of operation of FIG. FIG. 6 is a sectional view showing a conventional example. [Explanation of symbols] 2 Support body 8 center shaft 10 Rotating members 42 center shaft member 46 Bending roller 48 thread forming roller 50 cylindrical shaft member 53 Eccentric shaft 58 Swing lever 66 Cylindrical cam member 68 Follower roller 81 Leaf spring lever

Continuation of front page (56) References JP-A-3-162291 (JP, A) JP-A-6-183486 (JP, A) JP-A-6-219499 (JP, A) (58) Fields studied (Int .Cl. ⁷ , DB name) B67B 3/00-3/28

Claims (1)

(57) [Claims 1] A support body which can be raised and lowered, a center shaft fixed to the support body and raised and lowered integrally with the support body, and rotatably fitted to an outer periphery of the center shaft. A rotating member supported by the support body; a cylindrical cam member coupled to the rotating member;
A cylindrical shaft member movably supported in the cylindrical cam member; a cylindrical shaft member fitted into the cylindrical shaft member and movably engaged with the central shaft body to cover the mouth and neck of the container; A pressing center shaft member for preventing relative rotation of the cap, and a swing lever which is supported by the cylindrical shaft member and abuts on a cam portion of the cylindrical cam member via a driven roller to swing. In a cap sealing head having a thread forming roller and a bending roller which are vertically supported by a swing lever and tighten the cap to the mouth and neck of the container, the swing lever is vertically adjustable in length. A cap seal wherein a leaf spring lever is mounted, the screw forming roller and the bending roller are supported via the leaf spring lever, and the driven roller is supported by the swing lever via an adjustable eccentric shaft. Head.