Battery convey jig

Abstract: The invention is intended to realize a battery convey jig (2) capable of efficiently conveying and sorting in conveying step, in a manufacturing process of a variety of batteries. The jig is cylindrical, having a hole (6) for accommodating a battery (1) in the center, and an iron ring (7) of a great specific gravity is buried as a weight in the lower part of the jig. Hence, stable supporting and conveying may be realized without increasing the bottom size of the jig.

Description: BACKGROUND OF THE INVENTION The present invention relates to a battery convey jig capable of conveying batteries or battery constituent members in a manufacturing process of a variety of batteries, and sorting in the conveying process, efficiently. In the manufacture of batteries, and in order to process mass production of batteries promptly, high speed conveyance of batteries or battery constituent members is demanded aside from the fast assembly of the batteries. In addition, from the viewpoint of space-saving, resource-saving, and energy-saving, there is an increasing demand for a battery convey jig having the characteristics of small size, light weight, non- tumbling battery structure, low noise output due to collision or friction of mutual jigs, low frictional force or wear, stability during temperature or humidity changes, and stable in dimensions. Batteries, which are slender and likely to tumble, are often assembled in the parts in standing position in the conveying process or in the process to completed products. Accordingly, in order to convey the batteries in a standing position by using a conveyor, and while preventing tumbling of batteries, a structure such as disclosed in Japanese Laid-open Utility Model No. 63-26626 has been employed. As shown in Fig. 6, as a conveying jig of a battery 1, a ring-shaped jig 2 made of synthetic resin or metal having a central hole is used. A groove 3 in a ring form is cut in the outer circumference of the jig 2 to guide the jig 2 or to prevent tumbling along a conveyor 5. As further proposed in Fig. 7, when separating and taking out the jigs 2 one-by-one, while conveying multiple jigs 2 continuously by using the conveyor 5, a pin 4 of a smaller diameter than the width of the groove 3 is projected and inserted into the groove 3, from an orthogonal direction to the running direction of the jigs 2. This limits the conveyance of jigs 2, and a gap is formed between adjacent jigs 2, so as to be separated and taken out one-by-one. Moreover, the cylindrical surface of the jig 2 is processed by surface forming cut for orienting the direction to define the position (or angle) of the battery accommodated in the jig. Other proposals include surface hardening treatment on the end surface or outer circumference of aluminum or other metal ring, and lining of the cylindrical surface with resin or other shock absorbing material to lower noise or prevent formation of flaw or burr. Such battery convey jigs are mostly small in diameter, and tumbling cannot be prevented without help of a guide or other like structure. Even if it is possible to convey in the horizontal direction by using the conveyor, it was impossible to convey in a vertically inclined direction or a vertical direction. Further, for the purpose of increasing the stability in the state being accommodated in the jig, an increase of outside diameter of jig is not preferred from the viewpoint of efficient use of space or increase of conveying speed. Still further, jigs capable of sampling certain batteries for inspection automatically, out of multiple batteries flowing at high speed, are also demanded. US-A-3 941 237 discloses a jig comprising a main body having a hole formed therein for accommodating a can in the center of the main body having a cylindrical profile. The center of gravity of the jig is positioned in the lower part of the main body. The main body includes a synthetic resin. A ring shaped weight having a specific gravity greater than that of the resin is disposed at the bottom of the jig. The weight is composed of a magnet material and is buried in the jig. SUMMARY OF THE INVENTION According to the invention, a battery convey jig comprises the features of claim 1. Preferably, the weight is comprised of iron. Still further, a jig number memory device may be incorporated with the battery convey jig. As pointed out in greater detail below, this invention provides important advantages of forming the profile of the main body in a cylindrical form, and positioning the center of gravity of a jig to accommodate and convey a battery or battery constituent member in its central hole, at its lower part. Moreover, by using a weight of large specific gravity, preferably a weight of magnetic material is positioned inside in the vicinity of the bottom of a jig made of synthetic resin, and more specifically an iron ring, tumbling may be prevented. In more detail, the central hole of the jig is defined in its depth, shape and precision enough for positioning the conveying object, that is, the battery. The central hole holds the battery without allowing looseness, and the bottom of the battery is accommodated in the jig is substantially expanded by the bottom of the jig. In addition, by making use of the magnetic force, tumbling can be prevented more securely, and when the batteries are fed into an assembling machine or processing machine by using this jig, positioning or standing of batteries can be controlled easily, so that the productivity may be enhanced. The invention itself, together with further objects and attendant advantages, will best be understood by reference to the following detailed description taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial sectional view of a battery convey jig in an embodiment of the invention. Fig. 2 is a schematic drawing showing the state of conveying batteries by using the battery convey jig in the embodiment of the invention. Fig. 3 is a partial sectional perspective view of a battery convey jig in other embodiment of the invention. Fig. 4 is a schematic drawing showing the mode of sampling by using the battery convey jig in the ether embodiment of the invention. Fig. 5 is a sectional view of a battery convey jig in a different embodiment of the invention. Fig. 6 is a perspective view of a conventional battery convey jig. Fig. 7 is a schematic drawing showing the mode of processing using the conventional battery convey jig. DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the Figs. 1-5 of the drawings, the preferred embodiments of the invention are described in detail below. As shown in Fig. 1, a jig 2 includes a main body having a cylindrical profile is formed of polyacetal resin, having a hole 6 for accommodating a battery 1 in the center. Near the lower end of the inside of this jig 2, an iron ring 7 of large specific gravity is buried, and the center of gravity of the jig 2 is lowered. By way of presenting an example of a jig suited to manufacture of UM3 dry cells (13.1 mm in outside diameter, 50 mm in height), the jig 2 measures 30 mm in outside diameter, 13.3 mm in inside diameter, and 22 mm in height, and the iron ring 7 buried in the jig 2 measures 28 mm in outside diameter, 17 mm in inside diameter, and 8 mm in height. As the material for the main body of the jig 2, a resin excellent in dimensional stability against temperature and humidity changes and less in wear is preferred, and specifically polyacetal resin or polyamide resin may be used. In this embodiment, the iron ring 7 is buried near the lower end of the resin-made jig 2, As illustrated in Fig. 2, a schematic diagram shows the mode of conveying the jig 2 accommodating the battery 1 in the hole 6 in a vertical up/down direction by making use of a conveyor belt 5. The iron ring 7 buried near the bottom of the jig 2 mutually attracts it with a permanent magnet 9 fixed in a conveyor frame 8, across the conveyor belt 5. By properly setting the magnetic force of the permanent magnet 9, the frictional force acting between the bottom of the jig 2 and the conveyor belt 5 can be easily set larger than the total weight of the jig 2 and battery 1. Besides, by incorporating the conveyor belt or turntable having a magnetic force into the jig 2, it is possible to convey easily in any direction, e.g. , horizontal, inclined, or vertical. In this manner, the battery 1 can be conveyed three-dimensionally, and from the viewpoint of space-saving, it is excellent. Moreover, by using the magnetic force from the bottom side of the jig 2, it is furthermore effective for preventing tumbling of the jig. As illustrated in Fig. 3, a battery convey jig is shown in another embodiment of the invention. The shape of an iron ring 7a buried in a jig 2a has a step, being thick in the lower part and thin in the upper part as shown in the drawing, which prevents the center of gravity of the jig 2a from becoming higher. When applied to this jig 2a, having 10 mm above the step, the iron ring 7a has an overall height of 18 mm. As illustrated in Fig. 4, a mode of sampling of batteries 1 is shown by the difference in shape of the iron rings buried in the jig 2 in Fig. 1 and the jig 2a in Fig. 3. A permanent magnet 12 is provided at the side of a jig accommodating part 11, which is a recess on the outer circumference of a turntable 10. A permanent magnet 15 is also provided at the side of a jig accommodating part 14, which is also a recess on the outer circumference a turntable 13. As compared with the permanent magnet 12, the permanent magnet 15 is greater in magnetic force and is set at higher position, and only a slight magnetic force acts on the jig 2 in which a low iron ring 7 is buried, but a stronger force acts on the jig 2a in which a high iron ring 7a is buried. A jig transfer position is set on a line linking the centers of the turntables 10, 13, and the timing of rotation is adjusted so that the jig accommodating parts 11 and 14 of the both turntables 10, 13 may come to this position simultaneously. In Fig. 4, when the jig 2 in which the low iron ring 7 is buried is conveyed from the left side in Fig. 4 to the jig transfer position by the jig accommodating part 11 of the turntable 10, it is simultaneously accommodated in the jig accommodating part 14 of the turntable 13. At this time, magnetic forces act on the iron ring 7 of the jig 2 from both permanent magnets 12 and 15, but the attraction force of the permanent magnet 12 acts stronger due to the difference in mounting position ( i.e. , difference in height) of the permanent magnets 12 and 15. Therefore, the jig 2 is not transferred between the turntables, and the turntable 10 conveys the jig 2. On the other hand, when the jig 2a in which the high iron ring 7a is buried is conveyed into the jig transfer position by the jig accommodating part 11 of the turntable 10, magnetic forces of both permanent magnets 12 and 15 act on the iron ring 7a of the jig 2a. In this case, since the iron ring is high, the attraction force of the permanent magnet 15 is stronger than the attraction force of the permanent magnet 12, the jig 2 is transferred between the turntables 10 and 13. Furthermore, as the turntables 10, 13 rotate, the jig 2 is conveyed by the jig accommodating part 14 of the turntable 13, and the battery 1 can be sampled. In this sampling step, the turntable may be either in intermittent rotation or in continuous rotation. Variations on the embodiments described above are possible. For example, the shape of the iron ring 7 is not limited to the ring shape alone, but depending on the conveying object and jig shape, a press processed piece of proper shape such as a disk and cup may be buried. Alternately, a resin-made ring filled with iron powder may be also used. In another variation, aside from using permanent magnets as mentioned above, by using electromagnets, further advanced sorting of jigs and other controls may be realized. As an example of sampling, a jig number memory device is incorporated in the jig 2, and when a jig number reading device or magnetic sorting device is used in combination therewith in contact-free configuration, more effective quality control activity may be realized. As the jig number memory device, for example, a number memory unit of ID sensor is built inside the jig 2. In yet another variation, as a specific example of sampling, sampling may be done for checking fluctuations in filling amount of compound in the filling step. In yet a further variation, Fig. 5 shows another example in which the lower opening of the hole 6 is smaller in diameter than the upper part. In this construction, the protrusion of battery or the like may be prevented from projecting out of the jig. Not limited to this example, the shape of the hole may be properly selected depending on the shape and properties of the batteries. The embodiments described above provide a number or significant advantages. Specifically, by forming the profile of the main body in a cylindrical form, the center of gravity of a jig is positioned for accommodating and conveying a battery or battery constituent member in its central hole, at its lower part. Moreover, by using a weight of large specific gravity, preferably a weight of magnetic material positioned inside in the vicinity of the bottom of a jig made of a synthetic resin, and more specifically an iron ring, tumbling may be prevented. As yet another advantage, the central hole of the jig is defined in its depth, shape and precision enough for positioning and conveying the battery. The central hole holds the battery without allowing looseness, and the bottom of the battery is accommodated in the jig is substantially expanded by the bottom of the jig. In addition, by making use of the magnetic force, tumbling can be prevented more securely. Also, and when the batteries are fed into an assembling machine or processing machine by using this jig, positioning or standing of batteries can be controlled easily, so that the productivity may be enhanced. Of course, it should be understood that a wide range of changes and modifications can be made to the preferred embodiment described above. It is therefore intended that the foregoing detailed description be understood that it is the following claims, including all equivalents, which are intended to define the scope of this invention.

Claims: A battery convey jig (2; 2a) comprising a main body having a hole (6) formed therein for accommodating a battery (1) or a battery constituent member in the center of the main body having a cylindrical profile, wherein the center of gravity is positioned in the lower part of the main body, wherein said main body. includes a synthetic resin, a ring shaped weight having a specific gravity greater than that of the resin is disposed near the bottom thereof, said ring shaped weight is composed of a magnetic material, and said ring shaped weight is buried in the battery convey jig (2; 2a), wherein said ring shaped weight is selected from two types of ring shaped weights differing in height, for discriminating by turntables (12, 13) having magnets (12, 15) differing in height and in magnetic forces. The battery convey jig of claim 1, wherein the ring shaped weight is an iron ring (7;7a). The battery convey jig of any of claims 1 or 2, wherein a jig number memory device is incorporated. The battery convey jig of any of claims 1 to 3, wherein the synthetic resin is selected from the group consisting of polyacetal resin or polyamide resin. The battery convey jig of any of claims 1 to 4, wherein said weight has a ring shape with two parts, one part being thick and disposed in the lower part of the main body and another part being thin and disposed in an upper part of the main body.

Inventors: HOSHI MASATOSHI, KOUDA MINORU, USUI HIROYUKI, HOSHI, MASATOSHI, KOUDA, MINORU, USUI, HIROYUKI, Usui, Hiroyuki Shonan Coporate House No.202
Applicants: MATSUSHITA ELECTRIC IND CO LTD, MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Application year: 1995
Main classification: H01M2
IPC codes: H01M2, B65G17