JP3855092B2 - Capper roller height adjustment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a capper, and in particular, a capper that performs threading along the thread of a bottle opening on the outer surface of a pilfer-proof cap (hereinafter referred to as PP cap) and seals by folding the lower end portion inwardly. The present invention relates to a device for adjusting the height of the roller.
[0002]
[Prior art]
A conventional capper that performs capping of a PP cap includes a plurality of pivot shafts that are arranged around a main rod that can be moved up and down and that can reciprocate, and a lock roller or a thread roller that is attached to the lower portion of each pivot shaft. A cam follower attached to the upper end of each pivot shaft via an arm, a torsion spring that biases each roller in the direction of the cap, that is, the direction of the main rod, and can be moved up and down relatively with respect to the pivot shaft. A conical actuator cam, etc., by moving the cam follower and the actuator cam relatively up and down, the cam follower is moved along the cam surface, and the rollers are rotated toward the cap to Screw along the thread of the bottle mouth by the thread roller by pressing against the outer surface And forming the outer surface of the cap is adapted to seal by folding the lower end of the cap on the inside by a locking roller (JP-A-5-97184).
[0003]
As shown in FIG. 7, the lock roller provided in the conventional cap described in the above publication forms a cylindrical portion 120a at the swinging end of the arm 120 fixed to the lower end portion of the pivot shaft 112. The cylindrical member 140 is fixed in the cylindrical part 120a. Further, a shaft 148 having a lock roller 122 provided at the lower end is fitted into the cylindrical member 140 so as to be movable up and down, and the head 150a of the bolt 150 screwed to the upper end of the shaft 148 and the cylindrical member 140 are fitted. A spring 154 is interposed between the upper end surface and the shaft 148 is always urged upward with respect to the tubular member 140 by the spring 154.
[0004]
The PP caps capped by the capper as described above have different heights even when the outer diameter is the same. When capping PP caps having different heights, the PP caps are different from each other. The height of the lock roller 122 must be adjusted according to the size of the cap. Therefore, conventionally, in order to adjust the height of the lock roller 122, (1) the entire roll-on chuck composed of the above components is replaced, or (2) the shaft 148 having the lock roller 122 is replaced, or (3) A method of adjusting the height of the lock roller 122 with the bolt 150 of the shaft 148 has been performed.
[0005]
[Problems to be solved by the invention]
In the first and second methods, it is necessary to prepare a plurality of types of attachments to be replaced, which is expensive and requires a storage space. Further, in the third method, there is a problem that a fine adjustment of a slight height has to be performed for each lock roller, which takes a lot of time and labor.
[0006]
The present invention has been made to solve the above-mentioned problems, and it is not necessary to replace the attachment and is low-cost. In addition, the height of a roller such as a lock roller can be changed in a short time with a small amount of labor. An object of the present invention is to provide a roller height adjusting device for a capper.
[0007]
[Means for Solving the Problems]
The apparatus for adjusting the height of a roller of a capper according to the present invention includes a first cylindrical member on a fixed side, a second cylindrical member slidably fitted in the first cylindrical member, and a second cylindrical member. A shaft that is inserted into the member and has a roller that is pressed against the cap at the lower end; and a spring that urges the second cylindrical member downward with respect to the first cylindrical member. A plurality of grooves having different depths are formed at the upper end of the member, and a positioning portion that can be fitted into the groove is formed at the upper end of the second cylindrical member. It is designed to be inserted.
[0008]
In the capper roller height adjustment device, when capping PP caps of different heights, the second cylindrical member is pulled up to lift the positioning portion of the second cylindrical member into the groove. To fit in a groove of another depth. The height of the lock roller is changed according to the depth of the groove in which the positioning portion is inserted.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view of a main part (roll-on chuck 2) of a capper provided with a roller height adjusting device according to an embodiment of the present invention. A cylindrical body (lower cylindrical body) 6 is fitted to the outer periphery of the main rod 4 that is disposed at the center of the roll-on chuck 2 so as to be movable up and down. The lower cylindrical body 6 is rotatably supported by the main rod 4 by upper and lower thrust bearings 8 and 10 and is moved up and down integrally with the main rod 4 in the axial direction.
[0010]
A circular plate portion 6a is formed on the lower outer periphery of the lower cylindrical body 6, and four pivot shafts 12 penetrating vertically are equally supported on the circular plate 6a at equal intervals in the circumferential direction. . An arm 14 that can swing in the radial direction is attached to the upper part of each pivot shaft 12. A cam follower 18 that engages with an actuator cam 16 to be described later and rotates the pivot shaft 12 is attached to the upper part of the swing end of the arm 14. In addition, an arm 20 having a cylindrical portion 20a is fixed to the lower end portion of each pivot shaft 12, and a lock roller 22 and a thread roller 24 are alternately mounted in the cylindrical portion 20a of each arm 20. . A torsion spring 13 is mounted on the outer periphery of each pivot shaft 12 and constantly urges the rollers 22 and 24 in a direction in which the rollers 22 and 24 are pressed against a PP cap 28 placed on a bottle 26. FIG. 1 shows only a configuration in which one lock roller 22 is rotated toward the PP cap 28 covered with the mouth portion 26a of the bottle 26, and the other rollers 22 and 24 have the same configuration. Therefore, the description is omitted.
[0011]
An actuator cam 16 for causing the lock roller 22 and the thread roller 24 to approach or retract from the PP cap 28 is fitted to the upper outer circumference of the lower cylinder 6 fitted to the outer circumference of the main rod 4. . The actuator cam 16 is fixed to the lower end surface of the upper cylinder 30 fitted to the upper outer periphery of the main rod 4, and rotates and moves up and down together with the upper cylinder 30. Since they are fitted via 32, they rotate integrally and move up and down relatively. The actuator cam 16 has a shape that gradually expands downward. When the cam follower 18 is lowered relative to the actuator cam 16, the cam follower 18 is pushed radially outward and twisted. The pivot shaft 12 is rotated in a direction in which the lock roller 22 and the thread roller 24 move away from the PP cap 28 against the spring 13. When the cam follower 18 is raised relative to the actuator cam 16, the cam follower 18 is swung radially inward, and the lock roller 22 and the thread roller 24 are moved to the outer peripheral surface of the PP cap 28 by the torsion spring 13. Press contact.
[0012]
The pivot shaft 12 is disposed around the main rod 4 at an interval of 90 degrees, and lock rollers 22 and thread rollers 24 are alternately attached to these four pivot 12 shafts. The thread roller 22 cuts a spiral groove along the screw of the bottle opening 26a on the outer peripheral surface of the PP cap 28, and the lock roller 22 bends the lower end portion of the PP cap 28 inward to perform sealing. In addition, a pressure block 34 is provided at the lower end portion of the main rod 4 so as to be movable up and down, and holds the top surface of the PP cap 28 that covers the bottle opening 26a when capping. ing.
[0013]
Here, the structure of the mounting portion of the lock roller 22 shown in an enlarged manner in FIG. 2 will be described in detail. A first cylindrical member (lock roller height switching bush) 36 is fixed in a cylindrical portion 20a formed at the end of the arm 20 attached to the lower end of the pivot shaft 12. The height switching bush 36 is threaded on the outer periphery of the lower portion and is screwed into a female screw formed on the inner surface of the cylindrical portion 20a of the arm 20. After setting to a predetermined height, it is fixed by a set bolt 38 (not shown). When capping, according to the type of cap, first, the height of the height switching bush 36 is adjusted and positioning is performed with the set bolt 38. This position will later become a reference for changing the height of the lock roller 22 by changing the cap. A second cylindrical member (lock roller bush) 40 is slidably fitted on the inner surface of the height switching bush 36. A spring seat 42 is fixed to the lower outer periphery of the lock roller bush 40, and a spring 46 is disposed between the spring seat 44 fixed to the lower surface of the upper cylindrical portion 20a, and the lock roller bush 40 is switched to a fixed height. The bush 36 is always urged downward.
[0014]
As shown in FIGS. 3 and 4, the upper end of the height switching bush 36 of the lock roller 22 has the same circumferential width w ₁ , and the depths d ₁ , d ₂ , and d ₃ respectively. Different three-stage grooves 36a, 36b, and 36c are formed. In this embodiment, two sets of grooves 36a, 36b and 36c having three stages of depths d ₁ , d ₂ and d ₃ are formed at symmetrical positions with respect to the axis O ₁ . On the other hand, on the outer surface side of the upper end of the locking bush 40, the grooves 36a, 36b, protrusion width w ₁ that matches the circumferential width w ₁ of 36c (positioning projections) 40a are two symmetrical position Is formed. These positioning convex portions 40a are simultaneously fitted into two grooves formed in the height switching bush 36 and having the same depth.
[0015]
In the lock roller bush 40, a shaft 48 having a lock roller 22 formed at the lower end is slidably fitted. A small-diameter cylindrical screw hole 48a is formed at the upper end of the shaft 48, and a bolt 50 is screwed into the cylindrical screw hole 48a. A second spring 54 is interposed between the lower surface of the head 50 a of the bolt 50 and a ball bearing 52 disposed on the upper end surface of the lock roller bush 40. The lock roller 22 provided at the top is always urged upward. This is to absorb the manufacturing error of the PP cap 28 and the bottle mouth 26a by allowing the lock roller 22 to descend with respect to the lock roller bush 40.
[0016]
1, the illustration of the pivot shaft 12 and the configuration for rotating the pivot shaft 12 is omitted, but the thread roller 24 is configured to reciprocate by the same configuration as the lock roller 22. .
[0017]
Next, the operation of the roller height adjusting device for a capper according to the above configuration will be described with reference to FIGS. 1, 5, and 6. FIG. 1 is a diagram showing a case where the PP cap 28 (28A) having the lowest height is capped, and a pair of positioning convex portions 40a formed at the upper end of the lock roller bush 40 are used for height switching. The bush 36 is inserted into the shallowest groove 36a among the grooves 36a, 36b, 36c of the three stages of depths d ₁ , d ₂ , d ₃ formed at the upper end of the bush 36. In this case, the lock roller 22 is at the highest position relative to the pivot shaft 12 on the fixed side, the arm 20 and the height switching bush 36, and the bottle 26 supplied below the main rod 4. The lower end portion of the PP cap 28 (28A) of a specific size fitted in the mouth portion 26a can be folded inward and sealed.
[0018]
When the PP cap 28 capped by the capper is a medium-sized PP cap 28 (28B) taller than the PP cap 28 (28A) of FIG. 1, as shown in FIG. Pull up roller bushing 40, extracting the positioning protrusion 40a from the first stage of the depth d ₁ of the groove 36a, is fitted substantially 60 degrees rotated so by the second stage of the depth d ₂ grooves 36b. When the positioning convex portion 40a is inserted into the second-stage groove 36b deeper than the first-stage groove 36a, the shaft 48 and the lock roller 22 provided at the lower end of the shaft 48 are fixed to the height-switching bush 36 on the fixed side. On the other hand, it is lowered by a predetermined amount (the difference in depth d ₂ -d ₁ between the first-stage groove 36a and the second-stage groove 36b) than when the PP cap 28 (28A) is capped. By lowering the lock roller 22, the lower end portion of the PP cap 28 (28B) which is taller than the PP cap 28 (28A) of FIG. 1 by the depth difference (d ₂ -d ₁ ) is folded and sealed. can do.
[0019]
Further, when capping the largest PP cap 28 (28C), which is taller than the intermediate-size PP cap 28 (28B), the lock roller bush 40 is lifted again, and the positioning convex portion 40a was removed from the second stage of the depth d ₂ of the groove 36b, it is fitted substantially 60 degrees rotated in the deepest in the third stage of a depth D ₃ groove 36c. As shown in FIG. 6, the shaft 48 and the lock roller 22 provided at the lower end of the shaft 48 are fitted into the groove 36 b having the intermediate depth d ₂ with respect to the height-switching bush 36 on the fixed side. It is further lowered by a predetermined amount (difference d ₃ -d _{2 in} depth between the second groove 36b and the third groove 36c). By lowering the lock roller 22 in this way, the lower end portion of the PP cap 28 (28C) taller than the PP cap 28 (28A, 28B) of FIGS. 1 and 2 can be folded and sealed.
[0020]
As described above, the shaft 48 provided with the lock roller 22 is pulled up once, extracted from the currently fitted grooves 36a, 36b, 36c, rotated by a predetermined angle, and inserted into another groove. Since 22 can be positioned at a preset height, the height adjustment of the lock roller 22 is extremely easy, and can be performed in a short time with little effort. Moreover, the lock roller 22 can be automatically moved by simply inserting the positioning convex portion 40a into any one of the grooves 36a, 36b, 36c of the three predetermined depths d ₁ , d ₂ , d _3. Therefore, since it can be positioned at a predetermined height, delicate adjustment or the like is unnecessary. Furthermore, since it is not necessary to replace the entire roll-on chuck 2 or the attachment such as the shaft 48 provided with the lock roller 22, it is not necessary to prepare many kinds of attachments, and the cost is low. There is no need for storage space for attachments.
[0021]
In the embodiment, two positioning convex portions 40a formed on the upper end of the lock roller bush 40 are provided at symmetrical positions, and the grooves 36a, 36b, 36c into which the positioning convex portions 40a are fitted are provided in three stages. Although two sets are provided with different depths d ₁ , d ₂ , and d ₃ , the present invention is not necessarily limited to the configuration of this embodiment. Furthermore, a plurality of grooves having different depths such as five stages and six stages may be formed with the positioning convex portion as one place.
[0022]
Further, in this embodiment, the thread roller 24 does not include a mechanism for adjusting the height like the lock roller 22, but the first and second cylindrical members and the first cylinder as well as the lock roller 22 are provided. A plurality of grooves having different depths formed at the upper end of the cylindrical member, a positioning projection formed on the second cylindrical member, and a spring that constantly urges the second cylindrical member downward with respect to the first cylindrical member Needless to say, the height can be adjusted by providing the like.
[0023]
【The invention's effect】
As described above, according to the present invention, the first cylindrical member, the second cylindrical member slidably fitted in the first cylindrical member, and the second cylindrical member are inserted into the second cylindrical member. And a roller having a roller pressed against the cap formed at the lower end, and a spring for urging the second cylindrical member downward with respect to the first cylindrical member. A plurality of grooves having different depths are formed, and a positioning portion that can be fitted into the groove is formed at the upper end of the second cylindrical member, and the positioning portion is fitted into any of the plurality of grooves. By doing so, the height of the roller can be changed very easily. Further, since it is not necessary to prepare a large number of attachments, the cost is low and a large storage space is not required.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of a capper provided with a roller height adjusting device according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is an enlarged view showing a cross section taken along line III-III in FIG. 1;
FIG. 4 is an unfolded view showing an upper end portion of a first tubular member.
FIG. 5 is a longitudinal sectional view showing a state in which the rollers of the roller height adjusting device shown in FIG. 1 are adjusted to different heights.
6 is a longitudinal sectional view showing a state in which the rollers of the roller height adjusting device shown in FIG. 1 are further adjusted to different heights. FIG.
FIG. 7 is a longitudinal sectional view showing a configuration of a conventional lock roller.
[Explanation of symbols]
22 Roller (Lock roller)
28 Cap 36 First tubular member 36a Groove (first stage groove)
36b Groove (second stage groove)
36c Groove (third stage groove)
40 Second cylindrical member 40a Positioning part (positioning convex part)
46 Spring (first spring)
48 Shaft 54 Second spring

Claims (1)

A first cylindrical member, a second cylindrical member that is slidably fitted in the first cylindrical member, and a roller that is inserted into the second cylindrical member and press-contacted to the cap are at the lower end. A shaft that is formed; and a spring that biases the second cylindrical member downward with respect to the first cylindrical member, and a plurality of grooves having different depths are formed at an upper end of the first cylindrical member. In addition, a positioning portion that can be fitted into the groove is formed at the upper end of the second cylindrical member, and the height of the roller is changed by fitting the positioning portion into any of the plurality of grooves. Capper roller height adjustment device characterized by the above.

Images