JPH048329B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a magnetic belt used in a magnetic belt conveyor unit of a magnetic continuous transport device, and a low-noise magnetic belt winding device for driving the magnetic belt. [Prior art] Conventionally, this type of magnetic belt was disclosed in Japanese Patent Application Laid-Open No. 1983-
This is disclosed in Japanese Utility Model Publication No. 2168046 and Japanese Utility Model Application Publication No. 59-144246. The magnetic belt disclosed in Japanese Unexamined Patent Publication No. 58-216804 is fixed by welding a magnetic metal piece placed on the front side of the belt to a U-shaped stopper. Further, the magnetic belt disclosed in Japanese Utility Model Application Publication No. 59-144246 is fixed by inserting a bolt from the back side (tooth surface side) of the rubber belt and tightening a magnetic metal piece. [Problems to be Solved by the Invention] The magnetic belt disclosed in Japanese Patent Application Laid-open No. 58-216804 has a problem in that the belt and the magnetic metal piece tend to loosen due to rotation and vibration of the belt, and the welded part may be damaged. Especially when rotating at high speeds, there is a great danger of flying magnetic metal pieces, metal fittings, etc. Furthermore, the stopper is exposed on the opposite side of the belt to the magnetic metal piece, which causes problems such as coming into contact with the carrier roller, driving wheel, and driven wheel, causing noise and shortening the belt's lifespan. be. Furthermore, since the weight of the metal pieces associated with the belt increases, there is also the problem that the central portion of the belt is lowered and both ends thereof are raised, which impedes rotation. In addition, the magnetic belt disclosed in Japanese Utility Model Application Publication No. 59-144246 is subject to repeated tensile loads and vibrations due to rotation of the belt, so that magnetic metal pieces are likely to come off due to loosening of bolts and nuts. There is also a problem that there is a great risk of flying off magnetic metal pieces. The present invention has been made to solve these problems, and provides a magnetic belt and a low-noise magnetic belt wrapping device in which a piece of magnetic material is firmly fixed to the belt and does not loosen due to rotation, and which produces less noise. The purpose is to obtain. [Means for Solving the Problems] A magnetic belt according to the present invention includes a belt having protrusions on both edges of the belt containing a tensile core material; a magnetic material piece disposed along the belt and having a leg protruding toward the back side of the belt; and a fixing pin that penetrates the leg portion of the magnetic material piece and fixes the magnetic material piece to the belt; The finished surface is formed by embedding the legs of the piece of material with elastomer. Furthermore, the low-noise magnetic belt winding device according to the present invention includes: at least one driving wheel; one or more driven wheels; and the above-mentioned magnetic belt; is characterized in that it is held without engaging the driven wheel. [Function] In the present invention, a pair of legs of a magnetic material piece is inserted from the front side into a belt having a concave cross section with protrusions protruding from both edges of the back side, and both legs are attached to the protruding legs. A locking pin that is long enough to span the length of the protrusion is passed through and fastened in a bolt-like manner, and both ends of the locking pin are buried within the protrusion of the belt, and the locking pin and the leg are covered with elastomer. Therefore, the magnetic material piece is prevented from falling off by simply attaching a locking pin in the form of a bolt. In addition, by wrapping such a magnetic belt around the driving wheel and the driven wheel with only the protrusions in contact,
Since the magnetic material pieces do not come into direct contact with the driving wheels and driven wheels, and the contact area is small, noise is reduced.Also, since the retaining pin reaches almost the width of the belt, it reduces the noise in the width direction. No deflection occurs, and less play occurs even when the belt rotates. [Example] FIGS. 1A and 1B are a side view and a sectional view taken along line B-B of a magnetic belt according to an example of the present invention. In the figure, 10 is a belt, and projections 11a and 11b are provided at both ends of the belt, respectively. The cross-sectional shape of this protrusion is shown in Fig. 2 A, B,
As shown in C and D, various shapes are adopted, such as a square, a square with one corner cut off, a square with both corners cut off, and a nearly semicircular tip. The protrusions of the belt in this embodiment are either integrally molded at the same time as the back surface is processed, or separately molded and bonded to the belt body by adhesive or other suitable methods. Further, a plurality of tensile strength core materials 12 are embedded in this belt 10 along the longitudinal direction. Reference numeral 20 denotes pieces of magnetic material, which are arranged at predetermined intervals along the length of the belt 10 on the surface side of the belt 10, but do not protrude from the surface of the belt 10, but are buried in the surface of the belt 10. can be made to the same level.
The arrangement is not limited to the same spacing, and the spacing can be changed as appropriate. Also, it may be one example or multiple columns. The magnetic material piece 20 is attracted by a magnet and is made of a magnetic material. Alternatively, a permanent magnet or an electromagnet that can be switched between energization and de-energization may be used as the magnetic material piece 20 on the belt, and a magnetic material piece that magnetically attracts the permanent magnet may be attached to the driven body side. Examples of magnetic materials include element symbols Fe, Ni, Co, Al, W, Mn, Cu, Cr,
If necessary, magnetic materials made of Ti, Si, V, Pt, Mo, Gd rare earth metals, alloys, compounds with other elements such as oxygen, singly or mixed, or in combination,
Natural materials and ceramics can also be mixed. The shape of the magnetic material piece 20 viewed from above the belt surface may be, for example, a square, a hexagonal shape, a trapezoid, a triangle, a polygon of pentagon or more, a circle, an ellipse, or a half-folded shape or modification thereof. The cross-sectional shape of the magnetic material piece 20 is trapezoidal,
Examples include inverted trapezoids, polygons larger than quadrangles, half-cut shapes of circles and ellipses, and streamlined shapes. The piece of magnetic material 20 is provided with legs, for example indicated by numerals 21a and 21b in the figure. These legs 21a and 21b may be fabricated integrally with the main body, or may be fabricated separately and then fixed together. Alternatively, it may be manufactured by cutting or forging. The legs 21a and 21b are made to penetrate the belt 10 and protrude to the back side of the belt. leg 21a,
The number of 21b is one depending on the size and purpose of the belt.
The number of legs 21a and 21b may be two or three, and the positions of the legs 21a and 21b relative to the magnetic material piece 20 are not limited to both ends but may be provided in a staggered manner toward the center. Reference numeral 30 denotes a retaining pin, which connects the leg portion 2 of the magnetic material piece 20.
The magnetic material piece 20 is fixed to the belt 10 by passing through holes 22a and 22b provided in the holes 1a and 21b. The retaining pin 30 can be appropriately selected from a rod shape, a pipe shape, etc., and its length depends on the belt width dimension.
It is set at 65% to 100%. The retaining pin 30 must pass through the holes 22a and 22b in the legs and fix the magnetic material piece 20 to the belt 10, but the retaining pin 30 must also have a sharp tip like a nail, and a stopper. You can also use one with a diameter attached or one with a different diameter midway through.
The material of the retaining pin 30 may be the same as that of the magnetic material piece 20, or a different material such as engineering plastic or thermosetting resin may be used. Leg portion 21 of magnetic material piece 20 through which fixing pin 30 is passed
a and 21b are covered and buried with an elastomer material,
It is molded into an appropriate shape and finished by vulcanization.
There are various methods for processing the back surface of the elastomer molded part 40 depending on the shape of the back surface of the belt 10, examples of which are shown in FIGS. 3A to 3F. The surface of this elastomer molded portion 40, ie, the finished surface 41, engages the drive wheel. Elastomeric molding 40 can be molded using conventional known techniques. In many cases, a molding method is employed. In addition, various types of fabrics such as synthetic fibers such as polyamide, aromatic polyamide, polyester, rayon, carbon, and fluororesin, woven fabrics (twill weave, plain weave, satin weave, etc.) and knitted fabrics using natural fibers are also used to reinforce the finished surface. , non-woven fabrics or sheets can be used. Further, as the elastomer material used for molding, a rubber compound alone or a blend of rubbers as appropriate can be used. Examples of elastomer materials used for molding include chloroprene rubber, nitrile rubber, butadiene, styrene rubber, urethane rubber, epichlorohydrin rubber, butyl rubber, (isobutylene/isoprene rubber, IIR), ethylene propylene rubber, ethylene propylene copolymer rubber, silicone rubber, Examples include fluorine rubber, chlorosulfonated polyethylene rubber, butadiene rubber, natural rubber, isoprene rubber, and hydrogenated nitrile rubber. An example of a magnetic belt conveyor unit incorporating a magnetic belt constructed as described above is shown in FIGS. 4A, B, and C. FIG. 4A is a plan view thereof, FIG. 4B is a front view, and FIG. 4C is an enlarged sectional view taken along the line CC of FIG. In the figure, 50 is the magnetic belt shown in FIGS. 1A and 1B, 51 is a carrier roller, 52 is a driving wheel, and 53 is a driven wheel. In the magnetic belt conveyor unit, a drive wheel 52 is rotationally driven by a drive source such as an induction motor (not shown), and the finished surface 41 of the elastomer molded portion 40 of the magnetic belt 50 engages with the drive wheel 52, causing the magnetic belt 50 to rotate. At this time, the carrier roller 51 and the driven wheel 53 are connected to the projections 11a and 11 of the magnetic belt 50.
b, and does not contact the finished surface 41 of the belt. Also, a retaining pin 30 is provided on the back side of the belt 10.
is provided, so that deflection in the belt width direction does not occur. The magnetic belt 50 can rotate with revolutionary low noise. Here, the height H of the protruding parts 11a and 11b of the belt and the elastomer forming part 40 from the belt surface are determined.
According to the relationship with the dimension h up to the finished surface 41, the following relationship is maintained between the dimension of the driven wheel 53 (or carrier roller 51) combined with the magnetic belt 50. h+g<H+D/2 That is, as shown in FIGS. 5A and 5B, the diameter D of the portion of the driven wheel 53 (the same applies to the carrier roller 51) that contacts the projections 11a and 11b of the magnetic belt 50, and the diameter D of the portion that does not contact the projections (the same applies to the carrier roller 51). Driven wheel 5 at the center of the driving wheel
This is the relationship when the dimension g from the rotating shaft of No. 3 to the driven wheel surface is taken as g. A in FIG. 5 is a case where H>h, and the center portion of the outer periphery of the driven wheel is flat or protruding. In the case of H≦h in FIG. B, the center portion of the outer periphery of the driven wheel 53 is always concave. Next, an example will be described. Example 1 (1) A magnetic belt was manufactured under the following conditions. (a) Belt; Length, 3500mm width, 140mm total thickness, 10mm tooth pitch, 14mm (b) Magnetic material piece; Material, iron leg length, 100mm width, 22mm thickness, 9mm distance between legs, 100mm Number of pieces installed, 125 pieces (c) Fixing pin; Iron round bar (length: 138 mm) (d) Apply chloroprene rubber adhesive to the entire back of the belt, and apply unvulcanized adhesive to the finished surface where the legs protrude and the protrusions at both ends of the back of the belt. A chloroprene rubber compound was set. A nylon fiber woven fabric was coated in advance with a chloroprene rubber adhesive, and the stretching direction of the fabric was aligned with the longitudinal direction of the belt to cover the portions that would eventually become the teeth, and the fabric was set in a mold. Vulcanized adhesion at 150℃ for 20 minutes. (2) Running test A rotating device with a pulley with a pitch diameter of 499.11 mm was set to an axial load of 1000 Kgf, and the belt was run at a maximum rotation speed of 45 Km/hr. Example 2 The configuration conditions and tests were the same as in Example 1.
Table 1 shows only the differences. Reference example (prior art): A magnetic belt disclosed in Japanese Patent Application Laid-Open No. 58-216804. The structural conditions and running test were the same as in Example 1, and only the differences are shown in Table 1.

【table】

〔Effect of the invention〕

As explained above, in the present invention, since the leg portions of the magnetic material pieces are covered, there is no fear of them coming off from the belt. In addition, there is no bending in the center of the belt, and the finished surface of the belt only engages with the driving wheel and does not engage with the driven wheel or carrier roller.
Noise generation is extremely low.

[Brief explanation of drawings]

FIGS. 1A and 1B are a side view and a cross-sectional view taken along line B-B of a magnetic belt according to an embodiment of the present invention, and FIGS. Cross-sectional views shown in Figure 3 A, B, C, D,
E and F are cross-sectional views showing the shape of the finished parts, respectively, and Fig. 4 A, B, and C are plan views, front views, and enlarged C-C of the magnetic belt conveyor unit using the magnetic belts of Fig. 1 A and B. FIG. Figure 5 A, B
2A and 2B are cross-sectional views of other embodiments of the magnetic belt conveyor unit, respectively. 10: Belt, 20: Magnetic material piece, 21a, 21
b: Leg portion, 30: Stop pin, 40: Elastomer forming portion, 41: Finished surface.

Claims (1)

[Scope of Claims] 1. A belt having a tensile strength core material inside and having protrusions extending longitudinally on the back side of both edge portions; a plurality of magnetic material pieces arranged at intervals, each having a pair of legs arranged in the width direction of the belt and protruding from the back side of the belt; a pair of legs of the magnetic material piece penetrating on the back side of the belt; a retaining pin having a length spanning both of the protrusions and having both ends embedded in the protrusions of the both edge portions; an elastomer coating covering the leg of the magnetic material piece between the protrusions and the retaining pin; A magnetic belt comprising: a layer; 2 The length of the retaining pin is 65 to 65 times the width of the belt.
The magnetic belt according to claim 1, characterized in that the magnetic belt is 100%. 3. A belt wrapping device comprising an endless magnetic belt stretched between a driving wheel and a driven wheel, wherein the magnetic belt has a tensile core material inside;
A belt having protrusions extending along the longitudinal direction on the back side of both edge portions; a plurality of protrusions are arranged on the front side of the belt at intervals in the longitudinal direction, and each protrusion is arranged in the width direction of the belt. a piece of magnetic material having a pair of legs protruding from the back side of the belt; a piece of magnetic material that is penetrated by the set of legs of the piece of magnetic material on the back side of the belt, has a length spanning both of the protrusions, and has both ends. a retaining pin embedded in the protrusion of the both edge portions; and an elastomer coating layer covering the leg of the magnetic material piece between the protrusions and the retaining pin; 1. A low-noise magnetic belt wrapping device, characterized in that the magnetic belt is wound in such a way that it contacts the driven wheel at a portion thereof, and is wound so as to be separated from the driven wheel between protrusions on both edge portions.