JP2008036764A - Cutting device for can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting device for a seamer section, which quickly and accurately performs a cutting operation for the seamer section of a can. <P>SOLUTION: The cutting device, in which a cutting face for inspecting the seamer section is formed by cutting the seamer section between a can trunk and can cover, comprises: a retaining member having a retaining hole 21 for retaining the can 1; a guide member movably guiding a retaining member in an axial direction of the can retained by the guide member, a cutting edge 5; and a spring 4 which generates restoring force when the retaining member guided by the guide member moves to a cutting operation position prepared by the cutting edge 5. The retaining member has a contact section 22, which brings into contact with a part of an end section of the can when the can 1 is inserted into the retaining hole 21, and moves together with the can 1, so that the end face of the can brings into contact with the contact section 22 when the can 1 is operated toward the cutting operation position, and moves in a direction kept away from the cutting operation position by the restoring force of the spring 4 when the cutting operation is canceled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a winding part cutting device used for inspection of a winding part of a can.

  Food cans, beverage cans, and the like are manufactured by filling a cylindrical can body with a bottom with the contents, and then winding the can body and can lid together. If this tightening is not performed completely, the contents in the can may leak or may be altered by touching the outside air. Therefore, the tightening portion can be inspected as necessary. This inspection can be performed by cutting the wound portion and observing the cut surface. FIG. 6 shows the can 1 with the winding part cut for inspection of the winding. As shown in the figure, a portion including a winding fastening portion 13 which is a joint portion between the can body 11 and the can lid 12 is usually cut at three places.

  Conventionally, cutting of the winding part of the can has been performed manually by using a scissors or the like, but a cutting device having a rotary blade has also been used in order to perform the cutting operation quickly. FIG. 7 shows a conventional winding part cutting device. Reference numeral 5 denotes a cutting blade composed of a pair of rotary blades, and usually three sets of cutting blades are used. A cylindrical guide member 8 guides the can 1 in the vertical direction with respect to the cutting blade 5, and is fitted and fixed in a hole provided in the top plate of the box including the cutting blade 5. When the operator lowers the can 1 along the cylinder inner surface of the guide member 8 while holding the end opposite to the can lid with the winding part of the can down, the can 1 has three sets of cutting blades. 5, the tightening portion 13 is cut at three points. When the winding tightening portion sandwiched between the pair of cuts formed at the respective cutting locations is pressed, the cutting surface of the winding tightening portion can be visually recognized, and the winding tightening state can be inspected.

In the conventional can winding part cutting apparatus, the operator inserts the guide member 8 while grasping the end of the can 1 and pulls it up from the guide member 8 after cutting the winding part. Since it was carefully inserted and pulled out, it took time to cut the winding part. Even if the operator pays close attention, it is inevitable that the can 1 fluctuates especially when the can 1 is brought into contact with the cutting blade 5 and when the can 1 is pulled up from the cutting blade, and therefore the winding portion There was a problem that distortion occurred on the cut surface.
JP-A-4-41032

  The objective of this invention is providing the cutting device which can perform the cutting operation | work of the winding part of a can rapidly and with high precision.

  In order to achieve the above object, the present invention provides a cutting device for cutting a winding fastening portion between a can body and a can lid to form a cutting surface for inspection of the fastening portion, and having a holding hole for holding the can. A member, a guide member for guiding the holding member so as to be movable in the axial direction of the can held by the holding member, a cutting blade, and the holding member guided by the guide member toward a cutting work position by the cutting blade. A restoring member that generates a restoring force when moving, and the holding member has a contact portion that comes into contact with a part of the can lid in a state where the can is inserted into the holding hole, When operated toward the cutting work position, the can lid abuts against the contact portion and moves together with the can, and when the operation is released, the restoring force of the restoring member moves away from the cutting work position. It is characterized by.

  According to a preferred embodiment of the present invention, the holding member has a flange, the guide member has a flange facing the flange, and the gap between the flange of the holding member and the flange of the guide member A spring as a restoring member can be arranged. Further, as the cutting blades, three pairs of rotary blades may be used at an angle of 120 degrees around a vertical line passing through the center of the can holding member.

  ADVANTAGE OF THE INVENTION According to this invention, the cutting device which can perform the winding part cutting | disconnection part of a can rapidly and with high precision can be provided.

  The present invention will be described below based on the illustrated embodiments. FIG. 1 is a front sectional view of a can tightening portion cutting device according to an embodiment, showing a state before the can is cut. Three motors 6 are installed at an angle of 120 degrees with respect to each other in the box 7 of the winding part cutting device. Each motor 6 includes a pair of rotary blades 5 and 5 in parallel postures close to each other. In the embodiment, the motor 6 is supported by the support member 72 attached to the top plate and the bottom plate of the box, but may be attached to other portions of the box 7. In the embodiment, three motors 6 are provided for driving the pair of rotary blades 5 and 5 respectively. However, the three motor blades 5 and 5 are simultaneously driven by the single motor 6 via the drive transmission means. You may employ | adopt the structure driven rotationally.

  As shown in FIGS. 4 and 5, the holding member 2 for holding the can includes a cylindrical portion 25 having a holding hole 21 for holding the can 1, and a flange 23 provided at an appropriate position of the cylindrical portion 25, for example, around the upper portion. And a contact portion 22 provided at an appropriate position of the cylindrical portion 25, for example, the bottom portion. The contact portion 22 is provided so as not to disturb the cutting of the can by the pair of rotary blades 5, 5, for example. Such a configuration can also be grasped as a configuration in which three notches 24 are formed in the bottomed cylindrical portion 25. The holding hole 21 is set to have substantially the same diameter as the outer diameter of the can 1, and the contact portion 22 holds the can 1 thereon and functions as a stopper that regulates the axial position of the can 1. A plurality of pins 26 are erected on the lower surface of the flange 23 of the can holding member. A guide member 3 guides the can holding member 2 so as to be movable in the axial direction of the can 1 held thereby. The guide member 3 is a cylindrical body having a hole into which the holding member 2 is inserted, and has a flange 31 in the upper part, and the hole 31 has a hole 32 through which a pin 26 standing on the flange 23 of the holding member is inserted. Provided. A spring 4 surrounding the pin 26 is attached around each pin 26 between the holding member flange 23 and the guide member flange 31. The spring 4 generates a restoring force when the holding member 2 guided by the guide member 3 moves toward the cutting work position by the rotary blade 5.

  A hole corresponding to the hole 32 through which the pin 26 provided in the guide member 3 is inserted is also provided in the top plate 71 of the box body 7. When the top plate 71 of the box body and the guide member 3 are positioned so that their pin insertion holes coincide with each other, the cylindrical portion of the guide member 3 is fitted into a hole provided in the top plate 71 of the box body, and the guide The member 3 is fixed to the top plate 71 of the box. In this state, when a plurality of pins 26 erected on the flange 23 of the holding member are inserted into the pin insertion holes of the top plate of the guide member 3 and the box 7 while holding the spring 4 around the pin 26, The tubular portion of the member 2 is fitted into the tubular portion of the guide member 3 and assembled in the state shown in FIG.

  In this embodiment, the spring 4 is used as a restoring member that generates a restoring force on the holding member 2. However, an elastic member such as rubber is provided between the collar 23 of the holding member and the collar 31 of the guide member. It is also possible. Further, if the inner diameter and length of the holding hole 21 for receiving the can 1 of the holding member 2 are changed, cans of different sizes can be handled.

  Next, the procedure of the operation | work which cut | disconnects the winding part of a can is demonstrated. In a state where the holding member 2 shown in FIG. 1 is located at the uppermost position with respect to the guide member 3 and the box 7 by the restoring force of the spring 4, the can 1 is held in the holding hole 21 of the holding member with the winding fastening portion 13 facing down. When inserted, the can lid 12 abuts against the contact portion 22 at the bottom of the holding member, and the can 1 is held in the holding hole 21 of the holding member. Next, the motor 6 is driven to rotate the three sets of rotary blades 5 and 5. When the bottom of the can 1, which is the top of the can, is strongly pressed by hand against the upward restoring force of the spring 24, the can 1 moves together with the holding member 2 to the inside of the box 7 and rotates to rotate. Contact the blades 5 and 5. When the can 1 is continuously pushed in from above, the winding portion of the can 1 continues to be cut by the rotary blades 5 and 5 until the holding member 2 is at the lowest position against the spring 4. FIG. 2 is a front sectional view of the state where the can 1 is cut by the rotary blade 5, and FIG. 3 is a sectional view taken along line (I)-(I) in FIG. As shown in FIG. 3, three notches 24 into which the pair of rotary blades 5 and 5 can enter are provided across the lower portion of the holding hole 21 of the holding member and the contact portion 22. The blades 5 and 5 cut the winding portion 13 of the can 1 without coming into contact with the holding member 2 to form three pairs of cuts. While the can 1 is cut, the can 1 is subjected to a downward pressing force by hand while receiving the restoring force of the restoring member such as the spring 4, so that the can fluctuates and rotates around the vertical line as in the prior art. There is no need to do so, and it is accurately cut linearly. In the embodiment, the can 1 and the holding member 2 are pushed in by hand, but it is also possible to separately provide a pushing member and push the can 1 and the holding member 2 by the pushing member.

  When the cutting is completed, the operator releases the pushing of the can 1. Then, the holding member 2 quickly returns to the initial state before the cutting operation shown in FIG. 1 by the restoring force of the spring 24. Thereafter, the can 1 is extracted from the holding member 2. And if the winding fastening part 13 pinched | interposed into a pair of notches is pushed in, the cut surface of the winding fastening part 13 will be visible, and the winding state of a can can be test | inspected.

It is front sectional drawing which shows the state before the cutting | disconnection of the can in one Embodiment of this invention. It is front sectional drawing which shows the state in the state of cutting | disconnection of the can in the real child form of this invention. It is the (I)-(I) sectional view taken on the line of FIG. It is a perspective view of a holding member and a guide member. It is the figure which looked at the holding member from the bottom. It is a figure which shows the can after cut | disconnecting a winding fastening part. It is front sectional drawing which shows the conventional winding fastening part cutting device of a can.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Can 11 Can trunk 12 Can lid 13 Winding part 2 Holding member 21 Holding hole 22 Contact part 23 鍔 24 Notch 25 Tube part 26 Pin 3 Guide member 31 鍔 32 Hole 4 Spring 5 Rotating blade (cutting blade)
6 Motor 7 Box 71 Top plate 72 Support member 8 Guide member (Conventional)

Claims (4)

A cutting device that cuts the winding part of the can body and the can lid to form a cutting surface for inspection of the winding part,
A holding member having a holding hole for holding the can;
A guide member for movably guiding the holding member in the axial direction of the can held by the holding member;
A cutting blade;
A restoring member that generates a restoring force when the holding member guided by the guide member moves toward a cutting work position by the cutting blade;
The holding member has an abutting portion that abuts a part of the can lid in a state where the can is inserted into the holding hole, and the can lid is in contact with the can when the can is operated toward the cutting work position. It moves with the can in contact with the contact portion, and when the operation is released, it moves in a direction away from the cutting work position by the restoring force of the restoring member.
A cutting device characterized by that. The holding member has a flange, and the guide member has a flange facing the flange.
The cutting apparatus according to claim 1, wherein the restoring member is a spring, and is disposed between the hook of the holding member and the hook of the guide member.   The cutting apparatus according to claim 1 or 2, wherein the cutting blade is a pair of rotary blades.   4. The cutting according to claim 1, wherein three sets of the cutting blades are provided at an angle of 120 degrees with respect to each other around a vertical line passing through the center of the holding member. 5. apparatus.

Images