JP4029367B2 - Sheet piece punching feed device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, while unwinding a sheet material wound in a hoop shape, a sheet piece having a predetermined shape, for example, a circular or ring-shaped bottom paper or a cardboard used for a cylindrical battery is sequentially punched from the sheet member to obtain a predetermined shape. The present invention relates to a punching and feeding device for sheet pieces suitable for transfer to a mounting position of the sheet.
[0002]
[Related background]
For the cylindrical battery, for example, a circular bottom paper 1 as shown in FIG. 8A fitted in the bottom of a bottomed cylindrical casing, or a carbon rod embedded in the central portion of the positive electrode mixture filled in the casing. A ring-shaped wrapping paper 2 as shown in FIG. 8B fitted into the (current collector) is used. This type of bottom paper 1 or backing paper 2 is generally punched from a sheet material wound in a hoop shape by using a punching device comprising a punching punch and a die paired with the punching punch. It is manufactured as a sheet piece by processing.
[0003]
Such a bottom paper 1 and a backing paper 2 are supplied to a production line for a cylindrical battery using a parts feeder 4 as shown in FIG. 9, for example. That is, the bottom paper 1 (sheet 2) is aligned and stacked in the cylindrical guide 5 by the parts feeder 4, and the bottom paper 1 (sheet 2) is pushed using the pusher 7 driven by the cam mechanism 6 from its lower end. ) Are pushed out one by one and supplied to a predetermined cylindrical battery manufacturing process section. The cam mechanism 6 includes a feed cam 6a that is rotationally driven, and a swing lever 6c that includes a cam follower 6b that rolls on the peripheral surface thereof.
[0004]
[Problems to be solved by the invention]
By the way, the sheet piece made of the bottom paper 1 and the paper 2 is formed by punching from a hoop-like sheet material. Therefore, particularly when punched from a portion near the core of the hoop, warping caused by the curl occurs. I can't deny that. When the sheet pieces (bottom paper 1 and backing paper 2) having such a warp are supplied into the above-described cylindrical guide 5, for example, as shown in FIG. Since the sheet piece sinks into the lower surface side of the piece and the sheet piece escapes upward, the pusher 7 cannot push out the sheet piece, and so-called paper jam occurs.
[0005]
When such a situation occurs, it is necessary to remove the sheet piece that is causing the paper jam, and during that time, the supply of the sheet piece is stopped. In particular, such a problem leads to a work stoppage in the production line of the cylindrical battery, and it is necessary to avoid it as much as possible. However, it is problematic in terms of productivity to eliminate in advance the sheet piece that has been warped due to the above-described curl or stop punching of the sheet piece from a portion close to the core of the hoop.
[0006]
The present invention has been made in consideration of such circumstances, and the purpose of the present invention is to reduce the thickness of a hoop-like sheet material that is formed by punching from a hoop-like sheet material and to increase the speed of the sheet piece. It is an object of the present invention to provide a punching device for sheet pieces that can be supplied stably.
In particular, the present invention can stably and reliably transfer the punched sheet pieces one by one without causing a paper jam while punching sheet pieces of a predetermined shape from the sheet material, and is suitable for incorporation into a battery production line, for example. Is to provide a punching feed device.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, a sheet material punching and feeding apparatus according to the present invention includes a punching punch and a die paired with the punching punch, and a sheet piece having a predetermined shape from a sheet material introduced onto the die. For example, a punching mechanism for punching and forming a base paper or a paperboard to be assembled in a cylindrical battery, and a feed mechanism for taking out and transporting a sheet piece punched by the punching mechanism in a direction intersecting the punching direction. Equipped
In particular, the punching mechanism is provided with a punching punch mounted at the tip and driven to reciprocate to fit the punching punch into the die, and is provided inside the punching plunger so as to be movable forward and backward. And a knuckle plunger that is reciprocally driven to project the knuckle tip from the tip of the punching punch, and further, the sheet piece at the tip of the knuckle tip. On the other hand, the feed mechanism is provided with a tall protrusion that passes through the groove of the knuckle tip and pushes the sheet piece laterally.
[0008]
According to a second aspect of the present invention, the feed mechanism is configured to receive the sheet piece pushed out by the knuckle tip, and to have a guide groove that guides the received sheet piece in a lateral direction, and the transfer table. And a moving body that moves the protrusion along the guide groove. Furthermore, as described in claim 3, when the knuckle tip is in a state where the sheet piece is pressed onto the guide groove, the movable body is operated to pass the protrusion through the groove of the knuckle tip, Thus, the sheet piece is pushed out in the lateral direction.
[0009]
That is, the present invention pushes a sheet piece punched out of a sheet material by a punching punch into a guide groove of a feed mechanism by a knuckle tip provided inside the punching punch, and in this state, a protrusion that is moved by a moving body In such a way that it is pushed laterally by abutting against the side of the sheet piece, and at this time, a groove is formed at the tip of the nackout tip so that the projection does not collide with the nackout tip. It is characterized by having been provided.
[0010]
As a result, even when a sheet piece with a warp due to its curl is punched out of the sheet material, the sheet piece is flatly pressed onto the guide groove by the knuckle tip and is higher than its thickness. Since it can be pushed out in the lateral direction by the protruding portion, it can be transferred to a predetermined position one by one stably regardless of the thickness of the sheet piece and the presence or absence of warpage.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a sheet piece punching and feeding apparatus according to an embodiment of the present invention will be described with reference to the drawings, taking as an example a bottom paper supply apparatus incorporated in a manufacturing process of a cylindrical battery.
FIG. 1 is a perspective view showing a schematic configuration of a bottom paper supply device, FIG. 2 is a plan view thereof, and FIG. 3 is a side view of an essential part thereof. This apparatus intermittently feeds the sheet material 11 wound in a hoop shape, which is a material for forming the bottom paper, to the punching mechanism 12 at a predetermined speed at a predetermined length, and the punching mechanism 12 A bottom sheet 13 which is a sheet piece of a predetermined shape is punched from the sheet material 11, and the bottom sheet 13 is bottomed on the side of the punching mechanism 12 by a disk-shaped feed mechanism 14 provided below the punching mechanism 12. It is configured to transfer to a paper supply position. At the bottom paper supply position, the bottom paper 13 is attached to the battery casing that is sequentially transported along a cylindrical battery production line (not shown).
[0012]
In the figure, reference numeral 15 denotes a conveying device that rewinds and conveys the sheet material 11 and is provided on the downstream side of the punching mechanism 12. The sheet material 11 is intermittently driven by an index 15a and sandwiches the sheet material 11 to be predetermined. Conveying roller 15b that is pulled out by length and a tension roller 15c that is provided upstream of the punching mechanism 12 and that keeps the tension of the sheet material 11 between the conveying roller 15b constant.
[0013]
As shown in detail in FIG. 3, the punching mechanism 12 is a cylindrical punching plunger that is reciprocated up and down (in the direction of the front and back of the sheet material 11 supplied to the punching mechanism 12) by a punching cam 21. 22 and a punch-out plunger 23 provided inside the punching plunger 22 so as to be movable up and down and reciprocated up and down by the punching cam 21. The punching plunger 22 and the knockout plunger 23 are driven to reciprocate up and down by being associated with each other by the punching cam 21 via cam followers 22a and 23a. When the sheet material 11 is fed and stopped, it is driven downward. Specifically, as will be described later, for example, the punching plunger 22 is first lowered to a predetermined position, and the knockout plunger 23 is lowered to a predetermined position while the punching plunger 22 is held at the lowest position.
[0014]
A punching punch 24 having a predetermined shape is attached to the tip of the punching plunger 22. Further, a die 25 that is paired with the punching punch 24 that is driven downward by the punching plunger 22 is disposed opposite to the die 25 at a predetermined interval. The punching punch 24 is fitted into the die 25 by its lowering, thereby punching out a sheet piece (bottom paper 13) having a predetermined shape from the sheet material 11 guided therebetween.
[0015]
That is, the sheet material 11 supplied to the punching mechanism 12 is guided to the die 25 with its position regulated in the width direction. Then, after the sheet material 11 is sandwiched between the punching punch 24 at the tip of the punching plunger 22 driven downward and the die 25 as described above, the sheet material 11 is further moved below the die 25 by the punching punch 24 driven downward. Punched out. Accordingly, the sheet piece (bottom paper 13) punched from the sheet material 11 has a shape defined by the outer shape (male) of the punching punch 24 and the inner shape (female) of the die 25.
[0016]
The punching punch 24 has a hollow cylindrical structure, and a nackout tip 26 attached to the tip of the nackout plunger 23 can be inserted into the punching punch 24. The knuckle-out tip 26 protrudes from the tip of the punching punch 24 by the above-described lowering of the knuckle-out plunger 23, thereby further pushing down the bottom paper 13 punched by the punching punch 24 onto the feed mechanism 14. It plays the role of sending out.
[0017]
Further, as shown in FIG. 4, a groove 26 a having a predetermined depth is provided at the tip of the knuckle tip 26 along the direction of taking out the bottom paper 13 by the feed mechanism 14. The groove 26a is provided in the feed mechanism 14 and pushes the bottom paper 13 from the lower end of the knuckle-out chip 26 to the side thereof, and collides with a protrusion 31 (to be described later) that plays the role of conveying it to a predetermined position. Thus, the protrusion 31 is passed under the punching mechanism 12 (the punching punch 24 and the knockout tip 26).
[0018]
Here, the feed mechanism 14 will be described. As schematically shown in FIG. 4, the feed mechanism 14 includes a disk-shaped transfer table 33 having a ring-shaped guide groove 32 formed on the upper surface thereof, and the guide groove. And a moving body 34 for moving the projection 31 provided so as to be movable in the interior of the body 32. That is, on the upper surface of the transfer table 33, a sheet piece (bottom paper 13) punched from the sheet material 11 by the punching mechanism 12 is received, and the bottom paper 13 is supplied to the manufacturing line of the cylindrical battery. A guide groove 32 having a predetermined width for guiding the position is formed in a ring shape. The groove depth of the guide groove 32 is set to be slightly deeper than the thickness that allows for warpage of the sheet piece (bottom sheet 13). A slit groove 32 a for moving the protrusion 31 along the guide groove 32 is formed at the bottom of the guide groove 32.
[0019]
The protrusions 31 are formed on the periphery of a disc-shaped moving body 34 that is incorporated into the transfer table 33 and driven to rotate. For example, a plurality of protrusions 31 are provided at equal intervals in the circumferential direction. As the body 34 rotates, it moves in the slit groove 32a. The height of the protruding portion 31 is set so that the protruding length into the guide groove 32 is slightly shorter than the groove depth of the guide groove 32.
[0020]
Accordingly, the movable body 34 rotates in conjunction with the rotation of the punching cam 21 via the rotation transmission gear 35 as shown in FIG. When the sheet piece (bottom sheet 13) is punched by the punching mechanism 12 and pushed out onto the guide groove 32, the moving body 34 passes through the protrusion 31 in the groove 26a at the tip of the knuckle tip 26. It is supposed to be moved. As the projection 31 passes through the groove 26 a of the knuckle tip 26, the bottom paper 13 pressed into the guide groove 32 by the tip of the knuckle tip 26 as shown in FIG. Are pushed out in the lateral direction and transferred along the guide groove 32.
[0021]
The punching cam 21 described above punches the bottom paper 13 from the sheet material 11 by rotating the punching plunger 22 and the knockout plunger 23 up and down a plurality of times (for example, three times) by one rotation. It is configured as follows. Further, the feed mechanism 14 causes a plurality of (for example, eight) protrusions 31 provided at equiangular intervals to interlock with the punching of the bottom paper 13 and pass through the groove 26a of the knuckle tip 26 each time, The bottom paper 13 is synchronized so as to be pushed out from the front end of the knuckle tip 26 in the horizontal direction.
[0022]
Thus, according to the bottom paper supply device (sheet punching feed device) configured in this way, as shown in FIGS. 5 (a), 5 (b), and 5 (c), the punching plunger is disassembled. The sheet material 11 is guided onto the die 25 in a state where the punch 22 and the knockout plunger 23 are raised and the punching punch 24 and the knockout tip 26 are kept at the raised positions, respectively. The sheet material 11 is supplied by intermittently pulling out the hoop-shaped sheet material 11 by a length corresponding to the size of the bottom paper 13 (sheet piece) punched out from the sheet material 11 [FIG. a)].
[0023]
Thereafter, the punching plunger 22 is lowered with the rotation of the punching cam 21, and the sheet material 11 is sandwiched between the punching punch 24 and the die 25 attached to the tip of the punching plunger 22. 13 is punched out (FIG. 5B). Thereafter, the knockout plunger 23 is lowered with the rotation of the punching cam 21, and the nackout tip 26 attached to the tip thereof is projected from the tip of the punching punch 24. The bottom paper 13 is pushed out and pressed onto the guide groove 32 [FIG. 5 (c)].
[0024]
Then, in this state, the protrusion 31 passes through the groove 26a of the knuckle tip 26 as the moving body 34 rotates, and pushes the bottom paper 13 along the guide groove 32 to the side. In the state in which the bottom paper 13 is pushed in the lateral direction by the protrusion 31, the punching plunger 22 and the knockout plunger 23 are driven up by the rotation of the punching cam 21, and FIG. ) State. By repeating such a movement in order, while the hoop-like sheet material 11 is intermittently drawn out, the bottom paper 13 (sheet material) is punched one by one from the sheet material 11, and the guide groove 32 of the feed mechanism 14. Pushed out. Then, the bottom paper 13 is pushed out to the side of the knuckle tip 26 by the protrusion 31 moving in the guide groove 32 and is transferred one by one.
[0025]
At this time, since the protrusion 31 moves while passing through the groove 26a of the knuckle tip 26, the protrusion 31 is surely brought into contact with the edge of the bottom paper 13 to push out the bottom paper 13 in the lateral direction. That is, since the bottom paper 13 is pushed out by the protruding portion 31 having a height sufficiently larger than the thickness of the bottom paper 13, even if the bottom paper 13 is thin, it can be pushed out stably and reliably. Moreover, since the bottom paper 13 is pushed laterally by the protrusions 31 in a state where the bottom paper 13 is pressed onto the guide groove 32 by the knuckle tip 26, the bottom paper 13 is started from the portion where the curl of the sheet material 11 remains. Even when the sheet is punched out, the bottom paper 13 can be reliably pushed out and transferred.
[0026]
Even when the bottom paper 13 is not pressed onto the guide groove 32 by the knuckle tip 26, the protrusion 31 has a sufficient height to pass through the groove 26a of the knuckle tip 26. Therefore, even if the bottom paper 13 dropped into the guide groove 32 is warped due to curl, the protruding portion 31 is surely brought into contact with the edge portion and the bottom paper 13 is pushed out in the lateral direction. Can do.
[0027]
Therefore, the bottom paper 13 (sheet piece) is sequentially punched from the sheet material 11 without being concerned with the thickness of the bottom paper 13 and without any warp caused by curling, and this is stably and reliably one by one. It becomes possible to supply (feed) to. Moreover, since the sheet pieces can be fed stably and reliably one by one in this way, it is possible to sufficiently cope with an increase in the feed speed.
[0028]
The present invention is not limited to the embodiment described above. For example, as shown in FIG. 6, the push mechanism 42 is reciprocally driven by a cam mechanism 41 including a feed cam 41a that is rotationally driven and a swing lever 41c that is provided with a cam follower 41b that rolls on the peripheral surface thereof. It is also possible to implement using In this case, a protrusion 43 may be provided at the tip of the pusher 42 so as to pass through the groove 26a at the tip of the knuckle tip 26.
[0029]
In the case of punching and feeding a ring-shaped paper, a punching mechanism 16 for punching an inner diameter is provided on the upstream side in the running direction of the sheet material 11 as shown in FIG. The punching may be performed prior to punching the sheet piece. In this case, the punching mechanism 16 for punching the inner diameter is basically configured in the same manner as the punching mechanism 12 described above, and a punching punch 24 and a die 25 for inner diameter punching (small diameter) are mounted. good.
[0030]
Further, here, a device for punching and forming a circular bottom paper 13 or a ring-shaped paper and feeding it one by one is illustrated, but the shape of the sheet piece punched from the sheet material 11 is particularly limited. Instead, a punching punch 24 and a die 25 corresponding to the shape specification may be used. Further, it can be appropriately incorporated into various production lines other than the production line for cylindrical batteries. In addition, the present invention can be variously modified and implemented without departing from the scope of the invention.
[0031]
【The invention's effect】
As described above, according to the present invention, it is provided with a knuckle-out tip that protrudes from the tip of the punching punch and pushes out a sheet piece punched out by the punching punch to the feeder mechanism, and the feeder mechanism includes the above-mentioned nackout tip. Since it has a projection that passes through the groove provided at the tip and pushes out the sheet piece, even if the sheet piece punched out from the hoop-like sheet material is thin, or the sheet piece becomes a curl of sheet material Even if there is a warp due to this, it can be fed stably and reliably one by one. In addition, it has a simple configuration and can provide a great practical effect such as being able to sufficiently cope with high-speed feeding of sheet pieces.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a bottom paper supply device which is a sheet piece punching and feeding device according to an embodiment of the present invention and is incorporated in a manufacturing process of a cylindrical battery.
FIG. 2 is a plan view of the bottom paper supply device shown in FIG.
FIG. 3 is a side view of a main part of the bottom paper supply device shown in FIG. 1;
4 is a diagram showing a relationship between a knuckle-out chip and a protrusion that moves in a guide groove in the bottom paper supply apparatus shown in FIG. 1;
5 is an exploded view showing an operating state of the bottom paper supply device shown in FIG. 1. FIG.
FIG. 6 is a view showing a modification of the feed mechanism in the sheet piece punching and feeding device according to the present invention.
FIG. 7 is a plan view showing a schematic configuration of a bottom paper supply apparatus according to another embodiment of the present invention.
FIG. 8 is a diagram showing an example of a bottom paper and a backing paper as a sheet piece punched out from a sheet material.
FIG. 9 is a diagram showing a schematic configuration of a conventional sheet piece feeding device.
FIG. 10 is a diagram schematically showing a defect in a conventional sheet piece feeding device.
[Explanation of symbols]
11 Sheet material 12 Punching mechanism 13 Bottom paper (sheet piece)
14 Feed mechanism 15 Conveying device 16 Punching mechanism 21 Punching cam 22 Punching plunger 23 Knuckout plunger 24 Punching punch 25 Die 26 Knuckout tip 26a Groove 31 Protruding part 32 Guide groove 33 Transfer base 34 Moving body 42 Pusher 43 Protrusion Part

Claims (3)

A punching punch and a die paired with the punching punch are provided, a punching mechanism for punching a sheet piece of a predetermined shape from a sheet material guided onto the die, and a sheet piece punched by the punching mechanism. A feed mechanism for taking out and transporting in a direction crossing the pulling direction,
The punching mechanism is provided with a punching plunger that is reciprocally driven and fitted to the die with the punching punch mounted on the tip thereof, and is provided inside the punching plunger so as to be movable back and forth. A knuckle-out plunger that protrudes from the tip of the punching punch,
The knuckle tip has a groove formed in a leading direction of the sheet piece at the tip thereof, and the feed mechanism has a protrusion that pushes the sheet piece through the groove of the knuckle tip. A sheet-feeding device for punching sheets. The feed mechanism receives the sheet piece pushed out by the knuckle tip, and has a transfer table provided with a guide groove for guiding the sheet piece in a lateral direction, and the protrusion along the guide groove of the transfer table. The sheet feeding device according to claim 1, further comprising a moving body that moves the portion. 3. The sheet piece according to claim 2, wherein when the knuckle tip presses the sheet piece onto the guide groove, the moving body allows the protrusion to pass through the groove of the knuckle tip. 4. Punching feed device.

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