JP4336945B2 - Curve conveyor belt - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a curve conveyor belt.
[0002]
[Prior art]
Since the curve conveyor generates a force (centripetal force) to move inward in the belt driving state, as shown in FIGS. 5 and 6, the bead 9 including the thin portion 91 and the bulging portion 90 is The thin-walled portion 91 is sewn to the entire outer peripheral portion of the belt body 8, and the bulging portion 90 is sandwiched between the outer races of the bearings HB and HB of the holder H attached to the fixed portion (for example, Patent Document 1). There is.)
[0003]
By the way, in recent years, the above-described holder H has a tendency to be divided into upper and lower parts and reduce the number of attached parts in order to reduce work during maintenance such as belt replacement.
[0004]
However, when the number of holders H attached is reduced as described above, the centripetal force applied to each holder H increases, and the following problems arise.
[0005]
In the configuration shown in FIG. 5, the bulging portion 90 that comes into contact with the bearings HB and HB is swollen as indicated by the two-dot chain line in FIG. Therefore, it is difficult to support the belt body 8 so that it cannot move inward against the centripetal force acting on the belt body 8.
[0006]
In the configuration shown in FIG. 6, the centripetal force acting on the belt main body 8 causes a crack in the portion between the bulging portion 90 and the thin-walled portion 91, and the bulging portion 90 moves in the direction in which the bulging portion 90 comes out. . Even in this configuration, the belt main body 8 cannot be supported so as not to move inward with respect to the centripetal force acting on the belt main body 8.
[0007]
[Patent Document 1]
JP, 7-25434, A As a means to solve the above-mentioned problem, for example, it is conceivable that the whole bead is thickened or the bulging portion 90 is sewn. As a result, the flexibility of the belt becomes poor and smooth rotation of the belt becomes impossible.
[0008]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a belt for a curve conveyor that can be smoothly driven to rotate and is less likely to cause abnormal deformation and breakage in a bead.
[0009]
(Invention of Claim 1)
The belt for a curve conveyor according to the present invention is a belt for a curve conveyor comprising a belt body and continuous beads attached so as to cover at least the front surface and the back surface of the entire outer peripheral portion of the belt body. The protruding portion is integrated in such a manner as to be sandwiched between two thin-walled portions, and the outer peripheral side of the bulging portion has a linear cross section, the inner peripheral side has a circular arc shape, and the linear portion has an arc shape. The width is narrower in the inner and outer peripheral directions than the portion , and each thin portion is sewn to the belt body.
(Invention of Claim 2)
The belt for a curve conveyor according to the present invention relates to the invention according to the first aspect, and the cross-sectional shape of the bead is the same over the entire circumference.
(Invention of Claim 3)
The belt for a curve conveyor according to the present invention relates to the invention according to claim 1 or 2, wherein, among the two thin portions sandwiching the bulging portion, the inner thin portion is set to be thicker than the outer thin portion. It is.
(Invention of Claim 4)
The belt for a curve conveyor according to the present invention relates to the invention according to any one of the first to third aspects, and a portion where the bulging portion and the thin portion are continuous is formed in a cross-section R shape.
(Invention of Claim 5)
The belt for a curve conveyor according to the present invention relates to the invention according to any one of the first to fourth aspects, and the sewing of the thin portion to the belt body is set at a position away from the bulging portion.
[0010]
The action and effect of the curve conveyor belt of the invention will be clarified in the column of the embodiment of the invention.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
FIG. 1 is a plan view of a curve conveyor BC using a curve conveyor belt B according to an embodiment of the present invention, FIG. 2 is a perspective view of the curve conveyor belt B, and FIG. 3 is a sectional view taken along line XX in FIG. ing.
(About main components of this curve conveyor BC)
As shown in FIG. 1, the curve conveyor BC basically includes frames 3, 3, taper rollers 4, 4 rotatably supported on the front and rear portions of the frames 3a, 3b, and the taper rollers 4, 4. A curve conveyor belt B stretched between them and a number of holders 5 that support the outer periphery of the curve conveyor belt B are provided. One of the taper rollers 4 and 4 is rotationally driven by a motor 6. ing. In this belt conveyor BC, the holders 5 are not provided continuously, but are arranged with a small interval.
[0012]
As shown in FIGS. 2 and 3, the curve conveyor belt B is configured such that the front surface 10, the outer peripheral edge 11, and the back surface 12 in the entire outer peripheral portion of the belt body 1 are continuously covered with the beads 2.
[0013]
The belt body 1 has a shape of a peripheral surface of a truncated cone as shown in FIG. 2, and has a fan-like shape as shown in FIG. As the belt structure of the belt body 1, all known belt structures can be adopted.
[0014]
As shown in FIG. 3, the bead 2 is formed by integrally forming thin portions 21 and 22 formed at both ends in the width direction (internal and external directions) and in the vicinity thereof, and a bulging portion 20 formed at the center portion in the width direction. The thin-walled portions 21 and 22 are attached to the belt body 1 in such a manner that the thin-walled portion 21 is sewn to the sewing portion 21a and the thin-walled portion 22 is stitched 22a. ing. Of the two thin portions sandwiching the bulging portion 20, the thin portion 21 located inside is set slightly thicker than the thin portion 22 located outside, and the bulging portion 20 and the thin portions 21, 22 are set. A portion where the and are continuous is formed in a cross-sectional R shape. The bead 2 is made of a synthetic resin such as urethane.
[0015]
As shown in FIG. 3, the holder 5 that supports the above-described curve conveyor belt B is formed in a U-shaped cross section, and bearings 50 and 50 are arranged in a horizontal C shape. The forward path and the return path of the curve conveyor belt B are both supported by the holder 5.
[0016]
Here, in this curve conveyor BC, in order to prevent the curve conveyor belt B from moving inward, a pair of bearings 50 are brought into contact with the inner portion of the bulging portion 20 as shown in FIG. The bearing 50 is used for clamping.
(About the function of this belt B for curved conveyors)
(1). As shown in FIG. 3, the bead 2 is formed by integrating thin portions 21 and 22 formed at both ends in the width direction and in the vicinity thereof, and a bulging portion 20 formed at the center portion in the width direction. The thin wall portions 21 and 22 are attached to the belt body 1 in such a manner that the thin wall portions 21 and 22 are sewn (the sewing portion of the thin wall portion 21 is denoted by reference numeral 21a and the sewing portion of the thin wall portion 22 is denoted by reference numeral 22a).
[0017]
Therefore, the force acting on the bulging portion 20 from the bearings 50, 50 is not only the pulling force generated between the contact portion S between the bulging portion 20 and the bearing 50 and the sewing portion 21a, but also the contact portion S. Is also converted into a compressive force generated between the swelled portion 22a and the sewn portion 22a. Therefore, a crack in a portion between the bulging portion 20 and the thin-walled portion 21 as shown in FIG. The occurrence of is suppressed.
[0018]
Further, of the two thin portions sandwiching the bulging portion 20, the thin portion 21 positioned on the inner side is set slightly thicker than the thin portion 22 positioned on the outer side, and the bulging portion 20 and the thin portion 21, Since the portion where 22 is continuous is formed in a R-shaped cross section, the effect of suppressing the occurrence of cracks in the portion between the bulging portion 20 and the thin portion 21 is excellent.
(2). Since the bulging part 20 is attached by sewing the thin-walled parts 21 and 22 continuously formed on both sides of the bulging part 20 to the belt main body 1, FIG. There's no such thing as a form.
(3). The entire bead 2 does not become thick and does not sew the bulging portion 90 itself, so that the bend flexibility does not deteriorate. It can be driven.
(4). From the above (1) to (3), it is clear that this curve conveyor belt can be driven to rotate smoothly and abnormal deformation and breakage of the bead are less likely to occur.
[Other Embodiments]
In the first embodiment, the front surface 10, the outer peripheral edge 11, and the back surface 12 in the entire outer peripheral portion of the belt body 1 are continuously covered with the beads 2, but the present invention is not limited to this. As shown, only the front surface 10 and the back surface 12 in the entire outer peripheral portion of the belt body 1 may be covered with the beads 2.
In the first embodiment, among the two thin portions sandwiching the bulging portion 20, the thin portion 21 located on the inner side is set slightly thicker than the thin portion 22 located on the outer side. The part 21 and the thin part 22 may have the same thickness.
[0020]
【The invention's effect】
Since the present invention is configured as described above, it has the following effects.
[0021]
From the contents described in the section of the embodiment of the invention, it was possible to provide a belt for a curved conveyor that can be smoothly rotated and hardly bend and deform abnormally in the bead.
[Brief description of the drawings]
FIG. 1 is a plan view of a curve conveyor using a curve conveyor belt according to an embodiment of the present invention.
FIG. 2 is a perspective view of the curve conveyor belt.
3 is a sectional view taken along line XX in FIG.
FIG. 4 is a cross-sectional view of a curve conveyor belt according to another embodiment.
FIG. 5 is a cross-sectional view showing a state in which a belt for a conventional curve conveyor is supported by a holder.
FIG. 6 is a sectional view showing a state in which a belt for a conventional curve conveyor is supported by a holder.
[Explanation of symbols]
BC Curve conveyor B Curve conveyor belt 1 Belt body 2 Bead 10 Front surface 11 Outer peripheral edge 12 Back surface 20 Swelling portion 21 Thin portion 21a Sewing portion 22 Thin portion 22a Sewing portion

Claims (5)

A belt for a curve conveyor comprising a belt main body and a continuous bead attached in a manner covering at least the front and back surfaces in the entire outer peripheral portion of the belt main body, the bead sandwiching a bulging portion between two thin portions In this embodiment, the bulging portion is formed at the central portion in the width direction, the outer peripheral side of the bulging portion is linear in cross section, the inner peripheral side is circular in cross section, and the bead A belt for a curve conveyor, characterized in that the cross-sectional shape is the same all around, and each thin portion is sewn to the belt body. 2. The belt for a curve conveyor according to claim 1, wherein the cross-sectional shape of the bead is the same all around. The belt for a curve conveyor according to claim 1 or 2, characterized in that, among the two thin parts sandwiching the bulging part, the thin part located on the inner side is set to be thicker than the thin part located on the outer side. The curve conveyor belt according to any one of claims 1 to 3, wherein a portion where the bulging portion and the thin portion are continuous is formed in a R-shaped cross section. The curve conveyor belt according to any one of claims 1 to 4, wherein the thin portion is sewn to the belt body at a position away from the bulging portion.

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