JPH09192763A - Manufacturing device for periphery-shaped polyhedric wall can - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct high speed forming, and to easily perform the synchronous revolution adjustment of inner roller and outer roller in relationship of the so-called pinion to pinion. SOLUTION: In this device, by synchronously revolving an inner roller 1 with a projecting and recessed shape polyhedron on its outer periphery and an outer roller 2 with a polyhedron whose projecting and recessed shape is reverse to that of the inner roller 1 on its outer periphery, a polyhedric shape is formed on the side wall of a can body 3 which has been put between the inner roller 1 and the outer roller 2. By making a sectional shape in the diameter direction of the inner roller 1 an almost roundness, the polyhedron is formed on almost the whole of the peripheral surface of the almost roundness. And, the sectional shape in the diameter direction of the outer roller 2 is made a cam shape consisting of a large diameter part engaging with the inner roller 1 and a small diameter part which does not engage with the inner roll 1. And also, the polyhedron is formed on almost the whole of the outer peripheral surface of the large diameter part. The inner roller 1 and the outer roller 2 are provided as a pair. And also, by synchronously revolving the inner roller 1 and the outer roller 2 by the same drive system, the polyhedric shape is formed on the side wall of the can body 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a polyhedral shape on the side wall of a can body of a can, and more particularly to an apparatus for manufacturing a circumferential polyhedral wall can which can be formed at high speed and can be easily adjusted. .

[0002]

2. Description of the Related Art In recent years, a circumferential polyhedral wall can for canning as shown in FIG. 5, in which a polyhedral shape is formed on a side wall of a can body, has been developed. And, this peripheral polyhedral wall can, first, even when the material is thinned, has a large resistance to decompression deformation and the like during the cooling process after content filling sterilization or subsequent storage, Secondly, it has attracted the attention of consumers because it has many excellent points, such as small slippage when the can is gripped, and thirdly, the novel design of the can.

Since the present applicant is a developer of such a circumferential polyhedral wall can, Japanese Patent Application Laid-Open No. 4-300038 proposes a method and an apparatus for manufacturing the same. Japanese Patent Application Laid-Open No. 4-300038 discloses a can for canning, in which a circumferential polyhedral wall is formed on at least a part of a can body, and the polyhedral wall is in contact with constituent unit surfaces and constituent unit surfaces. It has a boundary ridge line and a crossing portion where the boundary ridge lines cross each other, and the boundary ridge line and the crossing portion project to the outside of the can relatively as compared with the constituent unit surface and have a convex shape. The axial arrangement is arranged with a phase difference.

Further, a method for producing a circumferential polyhedral wall can uses an inner mold having a convex shape corresponding to the vertices and ridges of the polyhedron on the surface and an outer mold having a convex shape corresponding to the valley of the polyhedron on the surface. The inner mold and the outer mold are engaged with each other via the can body before the lid is tightened to form an irregular polyhedron on the side wall of the can body.

Further, as shown in FIG. 6, the peripheral polyhedral wall can manufacturing apparatus has a plurality of polyhedral shapes having a number of repetitions smaller by at least one than the number of repetitions of the circumferential surface of the polyhedral wall to be formed. A mold 100, a rotating member 120 in which a plurality of the inner molds 100 are arranged so as to be able to rotate and revolve, and an inner mold of a can body 300 which is sequentially provided along a moving path around the periphery of the rotating member 120. 100 insertion mechanism 1
30 and a discharge mechanism 140 from the inner mold 100 of the can body 300
And a mold surface having at least the same number of repetitions as the number of repetitions of the circumferential surface of the polyhedral wall to be formed and disposed on the moving path from the surface of the inner mold 100 via a gap corresponding to the thickness of the can body. It has a configuration having one outer mold 200.

[0006] The apparatus for manufacturing a peripheral polyhedral wall can having the above-described configuration is configured such that the polyhedral shapes of the plurality of inner dies 100 match the polyhedral shape of one outer die 200, respectively.
The plurality of inner dies 100 are relatively moved while rotating to form a polyhedral wall on the can body. Therefore, it has a feature that the forming of the polyhedral wall into the can body 300 can be performed continuously and at a relatively high speed.

[0007]

However, the inner mold 1
6 and 7 are in a so-called pinion-rack relationship, as shown in FIGS. 6 and 7, when the molding speed exceeds 1500 cans / min, the inner mold 100 engages with the outer mold 200. In some cases, the protective coating layer applied to the can body was damaged by the impact and the impact when the inner mold 100 rolled along the outer mold 200 (generated due to rolling and rattling).

A plurality of inner molds 100 and one outer mold 20
At the time of meshing 0, the apparatus rotation mechanism had to be adjusted so that the multi-sided shapes of the plurality of inner dies 100 corresponded to the multi-sided shapes of the outer dies 200, respectively.

On the other hand, when the inner mold 100 and the outer mold 200 have a so-called pinion-pinion relationship as shown in FIG.
There is no impact when the outer mold 200 meshes with the zero. However, since the outer mold 200 is also rotating in the pinion-pinion relationship, it is necessary to adjust the rotation of the outer mold 200 to synchronize the rotations of the plurality of inner molds 100 with different drive systems. Thus, it took more time to adjust the device than that in the pinion-rack relationship.

The present invention has been made in view of these circumstances, and enables molding to be performed at a high speed, and also synchronizes an inner roller (inner die) and an outer roller (outer die) in a so-called pinion-pinion relationship. It is an object of the present invention to provide an apparatus for manufacturing a circumferential polyhedral wall can in which rotation adjustment can be easily performed.

[0011]

In order to achieve the above object, a peripheral polyhedral wall can manufacturing apparatus according to the present invention comprises an inner roller having an irregular polyhedron on the outer periphery thereof, and a polyhedron having an irregular surface opposite to the inner roller. An apparatus for forming a polyhedral shape on a side wall of a can body sandwiched between the inner roller and the outer roller by synchronously rotating an outer roller provided on an outer periphery, wherein the inner roller has a substantially circular cross-sectional shape in a radial direction, and an outer peripheral surface thereof. The polyhedron is formed almost entirely, and the outer roller has a radial cross-sectional shape that is a cam shape including a large-diameter portion that meshes with the inner roller and a small-diameter portion that does not mesh with the inner roller, and an outer peripheral surface of the large-diameter portion. And the inner roller and the outer roller are provided in pairs. And certain outer roller as a synchronously rotating with the same driving system. Preferably, the outer roller has a configuration in which the outer peripheral length of the large diameter portion is substantially the same as the outer peripheral length of the can body of the can to be molded.

Thus, the alignment of the polyhedral shape of the inner roller and the outer roller and the adjustment of the synchronous rotation need only be performed by relative adjustment between the paired inner roller and the outer roller, and the drive system of the inner roller and the outer roller is the same. Therefore, device adjustment is easy.

In addition, a holding body for mounting the can body is provided, and the holding body is swingably provided with respect to a slide body which moves toward and away from the inner roller, and the slide body moves toward the inner roller. Sometimes, the can body swings in a direction of pressing the can body against the inner roller. Preferably, a cam member for swinging the holding member is provided over a range where the large-diameter portions of the inner roller and the outer roller mesh with each other.

Thus, the can body is pressed against the inner roller only during molding, and the can body is reliably held between the inner roller and the outer roller.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus for manufacturing a circumferential polyhedral wall can according to the present invention will be described below. 1 is a schematic front view of the apparatus showing the relationship between an inner roller, an outer roller, and a cam member. FIG. 2 is a partially cutaway side view of a main part of an embodiment of the apparatus corresponding to the AA arrow view of FIG. FIG. 4 is a partially cut-away side view corresponding to the BB view of FIG. 3.

In FIG. 2, reference numeral 10 denotes a rotating shaft, and its left and right ends are rotatably supported by frames 11 and 12. One end (right end in FIG. 2) is engaged with a driving means (not shown) to rotate the rotating shaft 10. The drive gear 13 to be driven is fixed. Reference numeral 14 denotes a fixed gear, which supports the rotating shaft 10, FIG.
Is fixed to the left frame 11 concentrically with the rotating shaft 10.

Reference numeral 15 denotes a first rotating member which is concentrically fixed to the rotating shaft 10 and has, on its peripheral edge, an inner roller shaft 1a and an outer roller shaft 2a having an inner roller 1 and an outer roller 2 at their right ends, respectively. Multiple sets are supported to make The inner roller shaft 1a and the outer roller shaft 2a are positioned such that the inner roller shaft 1a is located closer to the center and the outer roller shaft 2a is at a predetermined distance (the radius of the inner roller 1 and the outer roller 2) on the same radiation in the first rotating member 15. They are juxtaposed outwardly at a distance (a distance equal to the radius of the large diameter portion described later). In this embodiment, 16 pairs of inner roller shafts 1a and outer roller shafts 2a, which form a pair in this way, are provided on the first rotating member 15 at intervals of 22.5 °.

An inner roller gear 16 meshing with the fixed gear 14 is fixed to the left end of the inner roller shaft 1a.
An outer roller gear 18 meshing with an intermediate gear 17 fixed to the inner roller shaft 1a is provided at the left end of the outer roller shaft 2a.
Is stuck. As a result, the paired inner roller shaft 1a and outer roller shaft 2a are rotated by the power from the same drive system, and their rotations are always synchronized under a fixed relationship.

A polyhedral shape is formed on the entire circumference of the inner roller 1 fixed to the right end of the inner roller shaft 1a, and portions corresponding to the apexes and ridge lines of the polyhedron are formed as projections and depressions. On the other hand, the outer roller 2 fixed to the right end of the outer roller shaft 2a has a cam shape having a large diameter portion on a half circumference and a small diameter portion on the other half circumference, and has a polyhedral shape similar to the polyhedral shape of the inner roller 1 on a large diameter portion. The portion corresponding to the valley (recess) of the inner roller 1 is a convex portion, and the portion corresponding to the convex portion of the inner roller 1 is a concave and convex shape. The circumference of the large diameter portion (half circumference) of the outer roller 2 is substantially the same as the entire circumference of the inner roller 1.

Here, the number m of circumferential surface repetitions in the polyhedral shape of the inner roller 1 is disclosed in Japanese Patent Laid-Open No. 4-300038.
It is preferable to use the same as that of the item. That is, assuming that the number of surface repetitions in the circumferential direction of the polyhedral shape to be formed on the can body 3 is n, m = n−α. Here, α is 1, 2,.
It is an integer such as In this manner, when the inner roller 1 makes one rotation and α / n rotations relative to the outer roller 2, a predetermined circumferential polyhedral wall, that is, a polyhedral wall having a surface repetition number of n is formed on the can body. And the diameter of the inner roller 1 can be made smaller than the minimum inner diameter of the can body 3 before and after molding.
Insertion of the inner roller 1 into the can body 3 and removal from the can body 3 after molding can be easily performed.

In FIG. 2, reference numeral 19 denotes a second rotating member, which is fixed to the rotating shaft 10 integrally with the first rotating member 15. On the peripheral surface of the second rotating member 19, a can body holding means 20 is provided at a position located on the right side of the inner roller 1. The can body holding means 20 includes the second rotating member 19.
A slide body 22 that slides along a slide guide 21 formed on the slide body, a swing body 25 that is swingably provided about a shaft 24 on a support body 23 fixed to the slide body 22, and a left side of the swing body 25. A can bottom contact plate 26 rotatably supported on the can body mounting roller 27 rotatably mounted on a roller support member 27a protruding on the left side of the rocking body 25, and a right side of the rocking body 25 It comprises a cam roller 28 and the like attached.

A shaft 24 for swingably mounting a rocking body 25 on the support 23 is provided with a bearing 23 provided on one side of the support 23.
b. A biasing member 29 is interposed between the support 23 and the protruding rod 25a of the rocking body 25 on the side opposite to the shaft 24, as shown in FIG. Therefore, the oscillating body 2
5 is always urged away from the support 23,
The protruding rod 25a of the rocking body 25 is
State.

In FIG. 2, reference numeral 30 denotes a fixing member which is located on the right side of the second rotating member 19 and is fixed to the frame 12. The cam groove 3 is provided on the peripheral side surface of the fixing member 30.
The cam groove 31 is formed at a position close to the inner roller 1 in FIG. 1 (a position where the inner roller 1 is inserted into the can body 3 on the can body mounting roller 27). In the range other than the above, it is formed at a position away from the inner roller 1 (a position where the inner roller 1 comes out of the can body 3 on the can body mounting roller 27). A cam groove 31 is formed at a portion connecting a position near the inner roller 1 and a position distant from the inner roller 1 along a locus corresponding to the movement of the can body.

Reference numeral 32 denotes a connecting member, which is provided at its right end with a cam roller 33 which is rotatably engaged with the cam groove 31.
The left part is fixed to the slide body 22. Therefore, when the trajectory of the cam groove 31 changes, the connecting body 32 also moves left and right accordingly.

Numeral 40 denotes a cam member, which is disposed outside the inner roller 1 over a range slightly wider than a range as shown in FIG. The position of the cam member 40 is such that the rocking body 25 moves to the left by the cam groove 31,
The cam roller 2 provided on the rocking body 25 when the inner roller 1 is inserted into the can body 3 on the can body mounting roller 27
8 is located at the same position.

The cam member 40 pushes the cam roller 28 against the resilient force of the urging member 29 in the range from the position shown in FIG. 1, and swings the rocking body 25 about the shaft 24 in the direction of the rotating shaft 10. To the state shown by the imaginary line in FIG. As a result, the can body wall in contact with the outer roller 2 is pressed against the inner roller 1.

In addition, magnets 35 and 36 are embedded in the support portions of the can bottom contact plate 26 and the can body placing roller 27, respectively. The magnets 35 and 36 ensure that the can body 3 is held on the can body mounting roller 27 when the steel can is targeted.

An apparatus for manufacturing a circumferential polyhedral wall can according to an embodiment having such a configuration operates as follows. When the rotation shaft 10 rotates by the rotation of the drive gear 13, the first rotation member 15 and the second rotation member 19 also rotate. As a result, the inner roller gear 16 meshing with the fixed gear 14 acts as a planetary gear and rotates (revolves), rotating the inner roller 1 and rotating the outer roller 2 via the intermediate gear 17 and the outer roller gear 18. Here, the gear ratio between the fixed gear 14 and the inner roller gear 16 is 4: 1, and the inner roller gear 16 makes one rotation when it makes a quarter turn along the fixed gear 14.

Further, the intermediate gear 17 and the outer roller gear 1
The gear ratio of 8 is 1: 2. When the intermediate gear 17, that is, the inner roller 1 makes one rotation, the outer roller 2 makes a half turn in synchronization with the inner roller 1. In this case, the positioning of the inner roller 1 and the outer roller 2 in the polyhedral shape can be performed very simply because only the mounting phase of the outer roller shaft 2a of the outer roller 2 needs to be adjusted. Further, the synchronization adjustment is automatically performed by the engagement of the intermediate gear 17 and the outer roller gear 18.

As described above, in a state where the inner roller 1 and the outer roller 2 are revolving around themselves, the can body 3 is held by the can body mounting roller 27 by a feeder (not shown) (a state shown on the lower side of FIG. 2). When the can body 3 is made of steel, the can body 3 is formed by the magnets 35 and 36 embedded in the can bottom contact plate 26 and the support portion of the can body placing roller 27.
Is firmly held.

When the second rotating member 19 rotates in this state, the cam roller 33 and the connecting member 32 move to the left according to the locus of the cam groove 31 formed in the fixing member 30, and the slide member 22 moves along the slide guide 21. Then, the can body 3 on the can body placing roller 27 is moved toward the inner roller 1. At this time, the center of the inner roller 1 and the center of the can body 3 are substantially aligned, and the outer roller 2 has a small diameter portion facing the inner roller 1, so that the movement of the can body 3 is not hindered at all. The inner roller 1 is inserted into the can body 3 without being removed (the position shown in FIG. 1).

Next, when the first rotating member 15 rotates to the position shown in FIG. 1, the cam roller 28 is pushed in by the cam member 40, and the rocking body 25 is moved to the position of the imaginary line shown in FIG. The inner roller 1 is swung about the shaft 24, whereby the side wall surface of the can body facing the outer roller 2 is pressed against the inner roller 1. At this time, the inner roller 1
The side wall surface opposite to the side wall surface pressed against is received by the can body placing roller 27 so that no excessive force is applied to the can body 3.

In this state, when the first rotating member 15 further rotates, the large-diameter portion forming the polyhedron shape rotates by the rotation of the outer roller 2 toward the side facing the inner roller 1, and the can body 3 is moved to the inner roller 1. And outer roller 2
Between the large-diameter portions. When the first rotating member 15 further rotates by 90 degrees and moves to the position shown in FIG. 1 with the can body 3 sandwiched, the inner roller 1 rotates by one rotation and the outer roller 2 rotates by half a rotation. A polyhedral shape is formed on the entire periphery of the side wall. In this case, if the outer circumference of the large diameter portion of the outer roller 2 is set to be the same as the entire circumference of the can body 3, a polyhedral shape is formed over the entire circumference of the can body 3.

The can body 3 having a polyhedral shape formed on the side wall is
When it revolves to the position shown in FIG. 1, the pressing of the cam roller 28 by the cam member 40 is released. As a result, the swinging body 25 swings in a direction in which the can body 3 is separated from the inner roller 2 by the elastic force of the urging member 29.

Next, when the can body 3 revolves to the position shown in FIG. 1 by the rotation of the second rotating member 19, the fixing member 3
0 in accordance with the trajectory of the cam groove 31 formed in the direction away from the inner roller 1.
2. The oscillating body 25 moves to the right, and the inner roller 1 comes out of the can body 3. After that, the can body 3 is taken out of the can body holding means 20 by a discharge mechanism (not shown). In this way, the forming of the circumferential polyhedron with respect to the can body 3 is performed.

The present invention is not limited to the above embodiment, but includes various modifications within the scope of the invention. For example, the mechanism for moving the support 23 (oscillating body 25) right and left may be not only a mechanism using the cam groove 31, the slide body 22, and the like, but also a mechanism combining a cylinder, a motor, a limit switch, and the like. Also, the can bottom contact plate 26
The holding of the can body 3 by using a vacuum suction means or the like other than a magnet may be used, and such a means can be suitably used for an aluminum can or the like other than a steel can. Further, the inner roller shaft 1a and the outer roller shaft 2a
As the rotation drive system, not only a gear unit but also a drive unit such as a timing belt may be used.

The polyhedron shape in the present invention is not limited to a unit surface having a quadrilateral shape, but may be other polygons, for example, a hexagonal shape. That is, the constituent unit surface of the polygon has a boundary ridge line where the constituent unit surfaces are in contact with each other and a crossing portion where the boundary ridge lines cross each other, and the boundary ridge line and the crossing portion are relatively radially outward as compared with the constituent unit surface. Any polygon may be used as long as the point of the convex portion and the axial arrangement of the constituent unit surfaces adjacent in the circumferential direction are arranged with a certain phase difference.

Further, the shape of each structural unit surface is a polygon with rounded corners or a circle or an ellipse, and has a constant radius of curvature R without forming sharp edges at boundary ridges and vertices where the boundary ridges intersect. It can be formed as follows. Still further, the present invention can be applied to a so-called bead can. For example, a circumferential bead may be provided at a small interval from the tightening portion, and a polyhedral wall formed of a unit surface may be carved between the upper and lower circumferential beads.

Furthermore, when the polyhedron shape is formed only on a part of the side wall of the can body, it becomes possible by providing the uneven polyhedron only on the corresponding portions of the inner roller 1 and the outer roller large diameter portion.

[0040]

According to the present invention having the above-described structure, it is possible to form a polyhedral shape without damaging the protective film layer applied to the can body even at a high speed of 1500 cans / min or more. In addition to this, it is possible to extremely easily perform the alignment of the inner roller and the outer roller in the form of a polyhedral system and the synchronous rotation of the inner roller and the outer roller.

[Brief description of the drawings]

FIG. 1 is a schematic front plan view of a device showing a relationship among an inner roller, an outer roller, and a cam member.

FIG. 2 is a side view, partially cut away, of a main part of the apparatus according to the embodiment, which corresponds to a view taken along the line AA of FIG. 1;

FIG. 3 is a front view of the can body holding means.

FIG. 4 is a partially cut side view corresponding to the BB arrow view of FIG. 3.

FIG. 5 is an external view showing an example of a can formed by the manufacturing apparatus of the present invention.

FIG. 6 is a schematic plan view showing an example of a conventional peripheral polyhedral wall can manufacturing apparatus.

FIG. 7 is a view for explaining an example of a conventional method for producing a circumferential polyhedral wall can.

FIG. 8 is a view for explaining another example of a conventional method for producing a circumferential polyhedral wall can.

[Explanation of symbols]

 1: inner roller (inner type) 1a: inner roller shaft 2: outer roller (outer type) 2a: outer roller shaft 3: can body 10: rotating shaft 11, 12: frame 13: driving gear 14: fixed gear 15: first rotating member 16 : Inner roller gear 17: intermediate gear 18: outer roller gear 19: second rotating member 20: can body holding means 21: slide guide 22: slide body 23: support body 24: shaft 25: rocking body 26: can bottom contact plate 27 : Can body mounting roller 28: Cam roller 29: Urging member 30: Fixed member 31: Cam groove 40: Cam member

Claims (4)

[Claims] An inner roller having an irregular polyhedron on the outer periphery thereof and an outer roller having a polyhedron having an irregular surface opposite to the inner roller on the outer periphery are synchronously rotated to form a polyhedron on a side wall of a can body sandwiched between the inner roller and the outer roller. An apparatus for forming a shape, wherein a radial cross-sectional shape of the inner roller is substantially a perfect circle,
The polyhedron is formed over substantially the entire outer peripheral surface thereof, and the outer roller has a radial cross-sectional shape having a cam shape including a large-diameter portion that meshes with the inner roller and a small-diameter portion that does not mesh with the inner roller, and the large-diameter portion. Manufacturing the polyhedron substantially all over the outer peripheral surface of the inner can, providing the inner roller and the outer roller in pairs, and synchronously rotating the inner roller and the outer roller with the same drive system, producing a circumferential polyhedral wall can. apparatus. 2. The apparatus according to claim 1, wherein the outer peripheral length of the large-diameter portion of the outer roller is substantially equal to the outer peripheral length of the can body of the can to be molded. 3. A holding body for holding the can body, wherein the holding body is provided swingably with respect to a slide body moving toward and away from the inner roller, and when the slide body moves to the inner roller side. 3. The manufacturing apparatus for a circumferential polyhedral wall can according to claim 1, wherein the can body swings in a direction in which the can body is pressed against an inner roller. 4. The apparatus for manufacturing a circumferential polyhedral wall can according to claim 3, wherein a cam member for swinging the holding member is provided over a range where an outer periphery of the inner roller and an outer periphery of a large diameter portion of the outer roller mesh with each other.