JPH09315532A - Curved conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curved conveyor capable of restraining sticking sound from being generated. SOLUTION: In a curved conveyor formed by stretching a conveyor belt 3 between a driving side taper roller 1 and a driven side taper roller 2, the coefficient of friction of the driven side taper roller 2 and the conveyor belt 3 is set to the half of the coefficient of friction of the driven side taper roller 1 and the conveyor belt 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curve conveyor.

[0002]

2. Description of the Related Art As a curved conveyor, there is, for example, one in which a conveyor belt is stretched between a pair of taper rollers, but in this one, the conveyor belt is prevented from moving inward against centripetal force. Therefore, between the taper rollers, a large number of holders are arranged outside the conveyor belt, and the bead material provided on the entire outer peripheral edge of the conveyor belt is supported by the upper and lower rotating bodies of these holders. Here, in this type of conveyor, the friction coefficient between the taper roller and the conveyor belt is set to about 0.6 to 0.8 in order to improve the transmission of the rotational torque.

When this conveyor is used, it is possible to move the object to be transported according to the trajectory of the conveyor belt,
The moving direction of the transported object can be smoothly changed.

However, in the above type of conveyor,
Normally, there is a difference in circumferential length between the inner side and the outer side in the radial direction of the curved conveyor due to manufacturing errors of the taper roller and the conveyor belt. Therefore, when the circumferential length difference is absorbed on the roller surface, a so-called stick noise is heard. There is a problem in that it produces a rather loud noise when used.

The stick noise is generated when the relative moving force acting between the taper roller and the conveyor belt during the driving of the conveyor becomes larger than the static frictional force between them and a slip occurs between them. It is possible, but as a result of research, it was discovered that the greater the static frictional force, the easier the stick sound is to be generated.

[0006]

Therefore, it is an object of the present invention to provide a curved conveyor capable of suppressing the generation of stick noise.

[0007]

The curved conveyor of the present invention is a curved conveyor in which a conveyor belt 3 is stretched between a driving side taper roller 1 and a driven side taper roller 2, and a driven side taper roller 2 and a conveyor belt 3 are provided. The friction coefficient is set to half or less of the friction coefficient between the drive-side taper roller 1 and the conveyor belt 3.

With respect to the above curved conveyor, the coefficient of friction between the driving side taper roller 1 and the conveyor belt 3 is set to 0.
It is preferable that the friction coefficient between the driven side taper roller 2 and the conveyor belt 3 is set to 0.3 or less by setting to 6 to 0.8.

In the curved conveyor of the present invention, when the tension of the conveyor belt 3 is set to the same as the conventional one, the frictional force between the driving side taper roller 1 and the conveyor belt 3 is the same as the conventional one, but the driven side taper roller 2 is The frictional force with the conveyor belt 3 is less than half that of the conventional one.
Therefore, the difference in circumferential length between the inner side and the outer side in the radius direction of the curved conveyor is absorbed on the roller surface in a manner that slippage occurs between the driven-side taper roller 2 and the conveyor belt 3 having a small static friction force. As a result, the generation of stick noise is greatly suppressed.

Since the static frictional force between the drive-side taper roller 1 and the conveyor belt 3 is the same as in the conventional case, the rotation transmission force from the drive-side taper roller 1 to the conveyor belt 3 is sufficient, and the conveyance ability is improved. It never falls.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the curved conveyor of this embodiment is basically rotatably supported by a frame 5 formed in an arcuate state and an end of the frame 5, respectively. Drive side / driven side taper rollers 1 and 2,
A frame 5 is provided between the driving-side and driven-side taper rollers 1 and 2.
A loop-shaped conveyor belt 3 stretched in an arc shape along the holder, a holder 4 for sandwiching the outer peripheral edge of the conveyor belt 3 to prevent the conveyor belt 3 from moving inward, and a frame 5 are predetermined. And a pedestal 6 which is supported in this posture, and the conveyor belt 3 is rotationally driven by rotating the drive side taper roller 1 by a motor M.

Although not shown, the drive side taper roller 1 is rotatably supported by the frame 5 by a bearing unit, and the surface contacting with the conveyor belt 3 is made of urethane (HS80 °) and the contact surface with the conveyor belt 3 is formed. The coefficient of friction is set to 0.65.

Although not shown, the driven-side taper roller 2 is rotatably supported by the frame 5 by a bearing unit. The surface contacting with the conveyor belt 3 is made of polyacetal resin and the friction coefficient of the contact surface with the conveyor belt 3 is increased. Is set to be 0.25.

The conveyor belt 3, as shown in FIG.
It is composed of a belt body 30 and a bead material 31 fixed to the outer peripheral portion of the belt body 30.

As shown in FIG. 2, the holder 4 has a rotating body 41 which is inclined downward from the inner peripheral side of the conveyor belt 3 toward the outer peripheral side thereof, and the rotary body 41 extending from the inner peripheral side of the conveyor belt 3 toward the outer peripheral side thereof. And the rotating body 42 inclined upward,
It is composed of a central rotating body 43 provided vertically to the conveyor belt 3 and a main body 40 rotatably attached to each of the central rotating bodies 43. The main body 40 is bolted to a supporting member 50. Installed. The central rotating body 43 is placed between the forward and backward paths 32 and 33 of the conveyor belt 3, the rotating body 41 is located on the upper side of the forward path 32 of the conveyor belt 3, and the rotating body 42 is located at the backward path 33 of the conveyor belt 3. The forward path portion 32 of the conveyor belt 3 is sandwiched between the rotary body 41 and the central rotary body 43, and the return path portion 33 of the conveyor belt 3 is sandwiched between the rotary body 42 and the central rotary body 43. There is. In this embodiment, basically, the rotating body 4
1, 42, 43 are formed by bearings, and the inner races of the bearings are supported and fixed, and the outer races are used as rotating parts.

As shown in FIG. 2, the frame 5 is provided with left and right support members 50 and 51 and a belt mounting plate 52 that is installed between the support members 50 and 51. The upper surface position of the mounting plate 52 is set in correspondence with the upper surface position of the taper rollers 1, 1.

Here, a noise comparison test was performed between the conveyor of this embodiment and a conventional conveyor. The results are shown in the table below. When the above conveyor was driven to rotate, there was almost no stick noise, and as is clear from this result, the running noise was considerably smaller than that of the conventional conveyor.

Although the above-mentioned result is changed to some extent depending on the form of the holder 4, the running noise of the curved conveyor according to the present invention is much smaller than that of the conventional one.

[0020]

Since the present invention has the above-mentioned structure, it has the following effects.

As is apparent from the means for solving the problems and the contents described in the section of the embodiment of the invention, it is possible to provide the curved conveyor capable of suppressing the generation of the stick sound.

[Brief description of drawings]

FIG. 1 is a plan view showing a curve conveyor which is an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 1 Driven side taper roller 2 Driven side taper roller 3 Conveyor belt

Claims (2)

[Claims] 1. A curved conveyor comprising a conveyor belt (3) stretched between a driving side taper roller (1) and a driven side taper roller (2), wherein the driven side taper roller (2) and the conveyor belt (3) are A curved conveyor characterized in that the coefficient of friction is set to be half or less of the coefficient of friction between the drive side taper roller (1) and the conveyor belt (3). 2. The friction coefficient between the driving side taper roller (1) and the conveyor belt (3) is set to 0.6 to 0.8, and the friction coefficient between the driven side taper roller (2) and the conveyor belt (3) is set. 2. The value is set to 0.3 or less.
Curved conveyor as described.