JP2005288631A - Trimmer device for metal can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trimmer device for a metal can having a cutting chip discharging mechanism capable of discharging the cutting chips from the can certainly out of a chip duct without splashing even if the manufacture is conducted on a high-speed line. <P>SOLUTION: The trimmer device for metal cans is configured so that the axially directed drive of a stripper plate 5 to discharge the cutting chips which engages a can after being trimmed with an inner cutter 3 is made independent of the axially directed drive of the can and the drive is made by a drive cam devoted solely to the purpose, and the minor diametric circular arc portion of an outer cutter 2 is furnished with a clamper 15 consisting of a resilient substance member which is located nearer the opening of the can than a cutting blade with a certain division left at the tail in the rotating direction and whose periphery forms a circular arc portion having the same diameter as a major diametric circular arc portion, and the cutting chips 51 from the can 50 are clamped by the clamper 15 and an inner cutter roll 3 until the chips 51 reach the chip discharge position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a trimmer device for a metal can that cuts an open end portion of a metal can, and more particularly to a discharge mechanism of cut cutting waste in the trimmer device for a metal can.

  Conventionally, as shown in FIG. 5, the metal can trimmer device is composed of a combination of a small-diameter inner cutter 30 fitted into the can body and a large-diameter outer cutter 31 that performs trimming in cooperation with the inner cutter from outside the can. Thus, the outer cutter has a small-diameter arc portion 33 and a large-arc portion cutting blade 34 formed on the outer peripheral portion thereof, and the cutting blade 34 has a circumferential length of approximately one circumference of the can body to be cut ( For example, see Patent Documents 1 and 2). 5A shows a front view of the main part of a conventional trimming apparatus, and B shows a timing chart of its operation. The outer cutter 31, the inner cutter 30 and the can holding member 35 rotate while revolving by a rotating turret, and the can is trimmed while the cutting blade 34 is engaged with the inner cutter (in the example shown, a revolving angle of 95 °). While the small arc portion 33 is opposed to the inner cutter 30, a gap is formed between the inner cutter and the outer cutter, so that the can holding member 35 supporting the can is interposed between the small cutter 33 and the inner cutter 30. In the direction (between 175 ° and 260 °), discharge of the can body 50 and cutting waste 51 cut from the can body (between 175 ° and 260 °) and supply of the next can body (from 10 ° to 95 °). During one revolution, the outer cutter 31 rotates three times, and the cutting blade of the outer cutter and the inner cutter engage with each other three times. Of these, the can body is supplied only once, so one trimming with one revolution. At the head, one can is trimmed.

In the conventional trimmer device shown in the figure, the stripper plate 36 for discharging the cutting waste adhering to the inner cutter after trimming is transmitted with the drive of the can body holding member 35, and at the same timing as the displacement of the can body holding member. It has a displacement structure. Accordingly, the cutting waste after trimming is discharged by moving the stripper plate 36 in the axial direction simultaneously with the displacement of the can body, so that the cutting waste 51 adhering to the inner cutter 30 is wiped off to the cutting waste duct 37 and the can When the body is displaced to the supply / discharge position (position shown in FIG. 5A), the axial displacement of the stripper plate is also finished. The swarfed cutting waste falls onto the cutting waste duct, and is sucked and discharged and collected outside. As shown in the timing chart of FIG. 5, when the stripper plate starts to be displaced, the trimming head has not yet reached the cutting dust duct arrangement position, but has reached the position of the stripper duct at the end of the displacement and has been scraped off by the stripper. Enters the cutting waste outlet of the cutting dust duct.
However, since the cutting waste is in an unconstrained state from the end of trimming to the discharge of the cutting waste, it is easy to cause displacement, and since the stripper plate is displaced and hits the cutting waste, it reaches a considerable speed. It will be knocked off suddenly, and the light cutting waste will be blown off and scattered without entering the cutting waste duct, and the scattered cutting waste will adhere to the can body and cause damage.
Japanese Utility Model Publication 54-35424 Japanese National Patent Publication No. 4-505129

  As described above, in the conventional trimmer device for metal cans, the cutting waste cut from the can body does not enter the discharge port of the cutting waste duct well, falls and adheres to the can body and damages the can body. There is a problem. This problem becomes more noticeable as the speed increases, but the stripper plate in the conventional stripper device is driven in the axial direction with the drive of the can bottom support that feeds and discharges the can. There is a problem that the stripper plate cannot be driven at the optimal timing for waste discharge, and the cutting waste separated from the can body is lightweight and unconstrained, so there is a problem that the behavior is unstable. There are issues to be solved.

  Therefore, the problem to be solved by the present invention is a cutting waste discharging mechanism that can surely discharge the cutting waste cut from the can body from the cutting waste duct without scattering even in a high-speed line. An object of the present invention is to provide a trimmer device for a metal can having the following.

  The trimmer device for a metal can according to the present invention that solves the above-mentioned problem is a trimming device for a metal can that trims the opening end of a metal can with a trimming head composed of an outer cutter and an inner cutter. The axial drive of the stripper plate for removing cutting waste adhering to the inner cutter is made independent of the axial drive of the can body and driven by a dedicated drive cam.

  It is desirable that the cutting timing of the stripper plate is shifted after the trimming head reaches the position where the cutting dust duct is disposed, so that the cutting waste can be reliably put into the cutting dust duct. The outer cutter includes a small-diameter arc portion and a large-diameter arc portion, and the large-diameter arc portion has a cutting blade having a circumferential length substantially equal to the outer circumferential length of the can body, and the rear end portion in the rotation direction of the small arc portion And a clamper made of an elastic body that is positioned closer to the opening of the can body than the cutting blade and whose outer periphery forms an arc portion having the same diameter as the large-diameter arc portion, and is cut from the can body. Clamping with the clamper and the inner cutter roll until the cutting waste reaches the cutting waste discharge position is desirable because the cutting waste that has been unconstrained in the past can be restrained and reliably discharged to the cutting duct. The outer cutter may be formed integrally by shifting the portion having the cutting blade and the portion having the clamper in the axial direction, but integrally forming the cutter roll having the cutting blade and the glamp roll having the clamper separately. Combining them together makes it easy to manufacture.

  According to the trimmer device for metal cans of the present invention, since the stripper plate can be driven separately regardless of the displacement of the can body, it can be driven at an optimal timing for discharging, and the cutting cut from the can body even in a high-speed line The waste can be reliably discharged into the cut waste duct without scattering the waste. Therefore, it is possible to solve the conventional problems such as cutting scraps adhering to the can body or brazing. According to the second aspect of the present invention, since the driving timing of the stripper plate is further shifted after the trimming head reaches the position where the cutting dust duct is disposed, the cutting waste can be reliably discharged to the cutting dust duct. Furthermore, according to the invention of claim 3, since the cutting waste cut from the can body is clamped by the clamper and the inner cutter roll until reaching the cutting waste discharge position, the cutting waste is restrained and reliably cut into the cutting duct. Can be discharged. And according to the structure of Claim 4, the outer cutter which show | plays such an effect can be manufactured easily.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1: shows the principal part of the trimmer apparatus for cans which concerns on embodiment of this invention, (a) is a front schematic, (b) is the side view.
The can body trimmer device 1 of the present embodiment includes an outer cutter 2 and an inner cutter 3 that constitute a trimming head, a can body holding member 4 that sucks and holds the can body and is driven to be displaced in the axial direction, and an inner cutter after trimming. It is the same as the conventional trimmer device that the stripper plate 5 that is displaced in the axial direction to remove the cutting waste and the cutting dust duct 6 are provided. However, the trimmer device of the present invention is devised differently from the conventional device particularly in the configuration, driving means, and driving timing of the outer cutter 2 and the stripper plate 5.

  First, in the can body trimmer device of the present embodiment, the drive of the stripper plate 5 is independent of the drive of the can body holding member 4, and a new dedicated drive cam (not shown) is provided on the trimming head side of the spindle. The cam follower provided at the end of the drive rod 7 connected to the stripper plate is fitted in the drive cam groove and moves left and right in FIG. As shown in the side view of FIG. 1B, the stripper plate 5 is formed in a sector shape having an arc surface with a curvature such that the inner cutter 3 is inscribed and the outer cutter 2 is inscribed at the time of trimming. A hole 8 that allows the inner cutter 3 to pass therethrough is formed in a part thereof. By making the stripper plate 5 into such a shape, the cutting waste enters the cutting waste duct described later more reliably. In this way, by driving the stripper plate 5 separately from the can holding member, the driving timing of the stripper plate 5 is driven to the cutting waste duct irrespective of the driving of the can holding member, as will be described later. The timing can be changed to ensure the most reliable discharge.

  Further, in the present invention, the cutting dust duct 6 is provided in a wider range as shown in phantom lines in FIG. 3 and in the time chart of FIG. Therefore, it extends to the axial movement start position, partitions the can body position and the cutting waste position, and is configured so that the cutting waste 51 struck by the stripper plate 5 surely falls into the cutting waste duct 6.

  As shown in FIG. 1, the outer cutter 2 includes a cutter roll 13 having a cutting blade and a cutting waste clamp roll 14 fixed integrally on the upper side thereof in the present embodiment. As shown in FIG. 1B, the cutter roll is formed in a small-diameter arc portion 10 and a large arc portion 11, and the outer periphery of the large arc portion is a cutting blade 12. The cutting blade 12 has a circumference that exceeds the circumference of the can body to be cut, but is formed at approximately 140 ° to 185 ° with respect to the entire circumference of the outer cutter. The cutting waste clamp roll 14 can hold the cutting waste with the inner cutter 3 after trimming until the trimming head reaches the position where the cutting waste duct 6 is disposed, and can reliably discharge it to the cutting waste duct. The outer diameter is smaller than that of the cutter roll, and a clamper 15 made of a rubber-like elastic body is arranged concentrically on the outer periphery so as to have the same diameter as the large arc portion of the cutter roll. is there. As shown in FIG. 1B, the clamper 15 is provided in a range of about 130 ° to 300 ° from the rotation direction start end of the small-diameter arc portion 10 of the cutter roll 13. Accordingly, the inner cutter 3 and the outer cutter 2 do not mesh with each other only in a range where the small-diameter arc portion 10 does not overlap with the clamper 15, and a gap is formed between the inner cutter and the outer cutter. Cutting waste can be discharged.

Next, the operation of the can trimmer device 1 of the present embodiment configured as described above will be described in detail with reference to the process diagrams of FIGS. 2 and 3 and the example shown in the timing chart of FIG.
FIG. 4 shows a front view of the main part of the trimmer device 1 for a can body, and part B shows a timing chart of its operation. The timing chart represents the timing of trimming and clamping of cutting waste by the cutting waste clamp roll together with the cam diagram showing the displacement of the can holding member and the displacement of the stripper plate when the trimming head makes one revolution, ie, the turret makes one revolution. ing. In the drawing, (a) is the stroke of the can holding member, and in this case, it is expressed as the displacement of the trimming position of the can. (B) represents the displacement of the stripper plate, (c) represents the trimming timing, and (d) represents the clamping time of the cutting waste. In the figure, the outer cutter 2 is configured to rotate twice (rotate) while the trimming head makes one revolution. The trimming of the previous can is finished, and the remaining cutting waste remaining after being locked to the inner roll is removed. The time when the next can is discharged from the inner roll and the supply to the can holding member 4 is completed is represented as 0 °. At that time, as shown on the left side of the figure, the clamper 15 and the inner cutter 3 are engaged with each other, and the can body holding member 4 and the stripper plate 5 are at the lowermost position in the figure.

When the turret rotates from this state, the outer cutter 2, the inner cutter 3, and the can body holding member 4 revolve together while rotating, and operate at the timings shown in FIG. Hereinafter, for convenience of explanation in FIG. 4, the axial displacement will be described as vertical movement (left and right movement in an actual apparatus). The revolution position of the trimming head at the main part positions (a) to (f) in the timing chart of FIG. 4 is shown corresponding to FIG. Moreover, the principal part front view of the apparatus at that time is shown in FIG. 2 (however, (d) is a front view at timing slightly different from FIGS. 3 and 4).
In the illustrated embodiment, when the turret rotates from a state where the revolution angle is 0 °, first, the can holding member 4 and the stripper plate 5 start to be displaced in the axial direction (upward in FIG. 4) by a cam means (not shown). Then, the can body 50 reaches a meshing position of the outer cutter 2 and the inner cutter 3 at about 80 °, and the trimming position starts trimming. At that time, the stripper plate 5 and the can holding member 4 have already reached top dead center. The inner cutter 3 and the clamper 15 are engaged with each other as shown in FIG. 3 for a while after the can starts rising, but as shown in the clamp diagrams (D) of FIGS. Immediately before being inserted between the cutters, the engagement between the inner cutter 3 and the clamper 15 is disengaged, and the small-diameter arc portion 10 of the outer cutter faces the inner cutter. There is no hindrance.

  Trimming is completed by a revolution angle of 152 °, and at the same time, the can body holding member 4 is lowered, and the can body 50 after trimming is started to descend. On the other hand, when trimming is completed, the inner cutter 3 and the clamper 15 are engaged with each other, and the cut scraps are clamped and held by the inner cutter and the clamper. Since the clamper 15 holds only the cut cutting waste 51, there is no problem in lowering the can body after cutting. This state is maintained and the cutting waste is continuously clamped until the revolution angle reaches 212 °. As shown in FIGS. 3 and 4, the position has reached a sufficient position where the cutting dust duct 6 is arranged, and the clamp of the cutting dust 51 is released to ensure that the cutting waste falls. It falls into the cutting waste duct 6. At a revolution angle of 225 °, the stripper plate 5 is lowered by a cam (not shown), the clamp is released, and the cutting waste locked on the inner cutter is forcibly struck down. At timing 270 °, the discharge of the cutting waste is finished. Thereafter, the inner cutter and the outer cutter are engaged again, but no trimming is performed because the can body is not yet supplied. Then, the inner cutter and the clamper are engaged again and return to the 0 ° position.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea.

  Since the present invention can stably discharge the cutting waste in the metal can trimmer device at an optimal timing and restrain the cutting waste, the cutting waste can be reliably discharged even in a high-speed line. Since the damage of the can body and the attachment of the cutting waste to the can body are suppressed and the yield of can body production is increased, the industrial applicability as a can body trimming device is high.

The principal part of the trimmer apparatus for cans which concerns on embodiment of this invention is shown, (a) is front schematic, (b) is the side view. It is cutting waste discharge process explanatory drawing based on the principal part front view of the trimmer apparatus for cans which concerns on embodiment of this invention. It is cutting waste discharge process explanatory drawing based on the state in the revolution position of the trimmer device for cans concerning the embodiment of the present invention. A part shows the principal part front view of the trimmer device for cans concerning the embodiment of the present invention, and B part shows the timing chart of the operation. (A) is a main part front view of a conventional trimmer device for a can body, (B) is a timing chart of its operation, and (B) is an AA arrow view of (a) of a trimming head part. FIG.

Explanation of symbols

1 Trimmer for can
2 Outer cutter 3 Inner cutter 4 Can body holding member 5 Stripper plate 6 Cutting waste duct 7 Drive rod 8 Hole 10 Small arc portion 11 Large arc portion 12 Cutting blade 13 Cutter roll 14 Cutting waste clamp roll 15 Clamper

Claims (4)

  In a trimming device for a metal can that trims the open end of a metal can with a trimming head composed of an outer cutter and an inner cutter that rotate and rotate, a stripper plate that discharges cutting waste engaged with the inner cutter after trimming the can body The metal can trimmer device is characterized in that the axial drive of the metal can is made independent of the axial drive of the can body and is driven by a dedicated drive cam.   The trimmer device for a metal can according to claim 1, wherein the driving timing for discharging the cutting waste of the stripper plate is shifted after the trimming head reaches the position where the cutting dust duct is disposed.   The outer cutter is composed of a small-diameter arc portion and a large-diameter arc portion, and the large-diameter arc portion has a cutting blade having a circumferential length substantially equal to the outer circumferential length of the can body, and is arranged at the rear end in the rotation direction of the small arc portion. It was cut from the can body by providing a clamper made of an elastic body that is located closer to the opening of the can body than the cutting blade and has an outer periphery forming the same diameter arc portion as the large diameter arc portion, leaving a predetermined section. The metal can trimmer device according to claim 1 or 2, wherein the cutting waste is clamped by the clamper and the inner cutter roll until reaching the cutting waste discharge position.   The said outer cutter is a trimmer device for metal cans of Claim 3 formed by integrally combining the cutter roll which has the said cutting blade, and the clamp roll which has the said clamper.

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