JPH0240032Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a return roller device, and is particularly applicable to belt conveyor devices of various widths, and is applicable to belt conveyor devices equipped with a wide conveyor belt. The present invention relates to a return roller device with an improved structure that can be effectively applied to the present invention.

(Prior Art) Generally, in a belt conveyor device, a conveyor roller device is disposed below a conveyor belt portion on which an object to be conveyed, such as ore, is placed. A return roller device is provided for supporting the portion of the conveyor belt on which the object is not placed, which is returned from the end point of the conveyance of the object to the start point of the conveyance.

As is well known, the performance of the return roller device, such as its weight and rotational resistance, is closely related to the operation of the conveyor, the durability of the belt, and the required drive horsepower, etc., and its operating cost. Furthermore, it has a significant impact on production costs.

Therefore, the applicant of the present application first proposed the
As disclosed in the above publication, we have proposed a return roller device having a structure in which a plurality of narrow return rollers are integrally attached to a single rotating shaft.

According to this invention, the return roller device can be made lightweight and inexpensive, and its handling properties can be improved, and falling of conveyed objects such as powder particles attached to the belt can be reduced, and the meandering of the conveyor belt can be reduced. can be prevented.

(Problem) However, when the return roller device according to the previous application as described above is applied to a belt conveyor device to which a wide conveyor belt is attached, if the length of the conveyor belt becomes about 1.0 m or more, The center of gravity of the conveyor belt is eccentric with respect to the rotating shaft due to the attachment of the conveyed object, the load of the conveyor belt, or its own weight, and the centrifugal force of the return roller device itself causes the center of gravity of the conveyor belt to be eccentric in the direction perpendicular to the rotating shaft. Since a large stress would be generated, there was a risk that the rotating shaft would break, and there was still room for improvement in terms of its strength.

In addition, in such a return roller device, since the conveyor belt is supported by a plurality of return rollers arranged at predetermined intervals in the axial direction, when the conveyor belt meanderes, Furthermore, the ends of the conveyor belt in the width direction tend to fall between the return rollers, and once they fall, it is difficult to return to the rollers, so there is a risk that the meandering may not be restored.

(Solution) In other words, the present invention was developed against the background of the above-mentioned circumstances, and its purpose is to:
It can be advantageously applied to belt conveyor devices of various widths, and can be particularly well applied to belt conveyor devices equipped with a wide conveyor belt. An object of the present invention is to provide a return roller device with an improved structure that can effectively prevent the fall of the roller.

In order to achieve such an object, the present invention is characterized in that, in the above-mentioned return roller device for supporting the portion of the conveyor belt on which the conveyed object is not placed, (a) (b) two opposing shaft members arranged concentrically at both ends of the conveyor belt in the width direction and supported in a fixed position and non-rotatably by a predetermined stationary member; (b) of the conveyor belt; Located in the width direction,
(c) a cylindrical inner cylindrical member connecting the two shaft members, into which the two shaft members are fitted at both ends and removably attached; and (d) a support roller having a predetermined outer diameter; (d) arranged concentrically at a predetermined distance on the outside of the inner cylindrical member, detachably attached to the support roller, and rotating together with the support roller; and (e) a cylindrical outer cylinder member that can be fitted onto the outside of the outer cylinder member and detachably attached to the outer cylinder member, so that the spacing between the outer cylinder members is narrower at both end portions than at the center of the outer cylinder member. The conveyor belt has a width for supporting the conveyor belt, the conveyor belt having a semicircular or arcuate hard urethane protrusion on its outer peripheral surface, which is fixed at a predetermined position and rotated integrally with the outer cylindrical member. The present invention is configured to include a plurality of narrow return rollers.

(Effect of the invention) Therefore, in the return roller device according to the invention, there is an inner cylindrical member that connects two shaft members to constitute a rotation center axis, and an inner cylindrical member disposed on the outside of the inner cylindrical member, Since the outer cylindrical members that rotatably support the plurality of return rollers with respect to the rotation center axis are all formed in a cylindrical shape, bending of these inner and outer cylindrical members, and by extension the entire return roller device. A conveyor in which rigidity can be advantageously ensured while suppressing an increase in weight, breakage etc. due to insufficient strength can be effectively prevented, and a wide conveyor belt (for example, 2.0 m or more) is attached. It can also be advantageously applied to devices.

In addition, in the case of such a return roller device,
The inner cylindrical member and the outer cylindrical member are each removable from the shaft member, and the return roller is also removable from the outer cylindrical member. By replacing the width of the conveyor with one corresponding to the width of the conveyor device used, it is possible to easily and economically adapt to conveyor devices of various widths.

Furthermore, in the return roller device according to the present invention, since the plurality of return rollers are arranged such that the spacing is narrower at both end portions than at the center portion in the belt width direction, when the conveyor belt meanderes, Moreover, it has the advantage that the width direction end portion can be advantageously prevented from falling between the return rollers, and the return to the normal state can be easily performed.

(Example) In order to clarify the present invention more specifically, an example having a structure according to the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show a carrier roller device (not shown) for supporting a conveyor belt section on which objects such as powder ore to be transported are placed. A return structure according to the present invention, which is disposed below and is returned from a conveyance end point to a conveyance start point of the conveyed article to support a portion of the conveyor belt on which the conveyed object is not placed. A roller device is shown.

In FIG. 1, reference numeral 10 denotes a conveyor belt, and a pair of mounting brackets 12 arranged on both sides of the conveyor belt are attached at a predetermined interval on the lower surface of a frame of a belt conveyor device (not shown). . A return roller device 14 having a structure according to the present invention is supported at both ends by the pair of mounting brackets 12, 12.

As shown in FIG. 2, the return roller device 14 has a pair of mounting shafts 16, 16 disposed on the same axis at both ends thereof. One end portion of the opposing axial direction is fitted into both ends of the cylindrical inner tube 18, respectively, and fixed by the inner tube fixing screw 20, so that they are aligned on the same axis. is forced to hold.

In addition, at the center of the other end surface of the mounting shaft 16,
Each has a bolt hole 22 drilled in the axial direction, and a set bolt 2 screwed into the bolt hole 22.
3, a mounting bracket 24 is fixed to the axially outer end of the mounting shaft 16.

On the other hand, a single circular groove 26 is provided on the outer peripheral surface of each mounting shaft 16.
A retaining ring 28 is fitted into the concave groove 26 in a fixed position in the axial direction, so that the two washers 30, 30 fitted onto the mounting shaft 16 can be fixed in position in the axial direction. The axial movement of the inner tube 18 can be restricted by the retaining ring 28 and the axial end surface of the inner tube 18. The inner ring 32a of the bearing 32 is fitted and fixed onto the outer circumferential surface of the mounting shaft 16 by having both end surfaces in the axial direction sandwiched between the two washers 30, 30. .

On the other hand, a substantially cylindrical support roller 34 made of synthetic resin is press-fitted and fixed to the outer peripheral surface of the outer ring 32b of the bearing 32, and is rotatably mounted on the mounting shaft 16. In addition,
The outer cylinder 36 of the support roller 34 has a length that covers substantially the entire exposed portion of the mounting shaft 16 exposed between the mounting fitting 24 and the inner tube 18, and the inner diameter of the axially inner portion is , is enlarged over a predetermined length, so that a stepped portion 38 in which the bearing 32 is to be accommodated is formed on its inner circumferential surface. Moreover, the support roller 3
4 has an outer cylinder 3 near its axially outer end.
6 has a flange portion 40 extending inward in the direction perpendicular to the axis from the inner circumferential surface. The flange portion 40 has an inner diameter that accommodates the mounting shaft 16 to be fitted therein.
The outer diameter of the annular protrusion 4 is slightly larger than the outer diameter of the annular protrusion 4 .
A labyrinth seal 4 for dustproofing is fitted onto the mounting shaft 16 on the side from which the seal 2 protrudes.
3 is provided in a state housed inside the outer cylinder 36.

Then, an outer tube 44 made of steel and having a thin cylindrical shape is fitted onto the outer peripheral surface of the support roller 34 as described above, which is attached to the pair of mounting shafts 16, 16 connected by the inner tube 18. It is fixed to the support roller 34 with mounting bolts 46 at both ends thereof, and is held on the same axis as the inner tube 18.

That is, the outer tube 44 is connected to the pair of mounting shafts 16, 16 connected by the inner tube 18.
are rotatably arranged on the same axis with a predetermined distance radially outward.

Eight return rollers 48 are fitted and fixed onto the outer peripheral surface of the outer tube 44 at a predetermined distance from each other in the axial direction.

The roller body 50 of this return roller 48 is
It is a molded product made of synthetic resin, and is composed of a relatively narrow outer ring part 52, a wide inner ring part 54, and a connecting part 56 that connects them. It has a plurality of extending reinforcing ribs 58. Further, in the roller main body 50, an annular hard urethane contact member 60 having a semicircular cross section is embedded in the outer ring portion 52, with a portion of the contact member 60 protruding from the outer peripheral surface. , a corresponding contact member 60 is placed in the mold.
It is formed by insert molding in a state in which these are arranged concentrically. In addition,
A plurality of axially extending protrusions 62 provided at the inner end of the contact member 60 are for holding the contact member 60 in a predetermined position within the mold.

The inner ring portion 54 of the roller main body 50
A return roller 48 is formed by fitting a metal sleeve 64 having approximately the same length as the inner ring portion 54 into the inner circumferential surface of the roller and fixing them with an adhesive or the like. -ing

Return roller 48 having such a structure
As described above, the roller fixing screw 66 is fitted onto the outer peripheral surface of the outer tube 44 and screwed into the metal sleeve 64 on the inner surface of the metal sleeve 64.
The return roller 48 is fixed at a predetermined position on the outer tube 44 by the return roller 48.
The structure is such that it can rotate together with the outer tube 44. In addition, here, the plurality of return rollers 4 (eight in this embodiment)
8, as clearly shown in Figure 1,
It is positioned with respect to the outer tube 44 so that the spacing is narrower at both ends of the outer tube 44 than at the center in the axial direction.

Return roller device 14 configured as described above
As shown in FIG.
The pair of mounting shafts 16, 16 and the inner tube 18 are installed in a state in which the notches 68 formed in the inner tube 18 are engaged with each other.
It is held non-rotatably by the mounting brackets 12, 12.

Therefore, the inner tube 18 holds the outer tube 44 to which the return roller 48 is fixed and the pair of mounting shafts 16, 16 supporting the outer tube 44 on the same axis.
However, since both are formed in a cylindrical shape, the bending rigidity of the inner tube 18 and the outer tube 44, and by extension the entire return roller device, can be advantageously ensured while suppressing an increase in weight. Furthermore, since the inner tube 18 is made unrotatable and only the outer tube 44 is rotated together with the return roller 48, the weight of the rotating parts is reduced.
The stress generated by centrifugal force can also be effectively reduced. Therefore, the return roller device 14 in this embodiment has a width of 2.0 m.
The present invention can also be effectively applied to a conveyor device to which the above-described conveyor belt is attached.

Further, in such a return roller device, both the inner tube 18 and the outer tube 44 are removable from the mounting shaft 16, and the return roller 50 attached to the outer tube 44 is attached to the mounting shaft 16. Since the rollers are also removable, the return roller device can be used in conveyor devices of various widths by simply changing the length of the inner tube 18 and outer tube 44 to suit the conveyor device. It can be easily configured. By making the parts compatible in this manner, the desired return roller device can be manufactured and provided more advantageously and at a lower cost, which is a great effect.

Furthermore, in this return roller device, both ends of the conveyor belt 10 in the width direction are supported by the return rollers 48 arranged at narrow intervals. It is possible to effectively prevent the ends of the conveyor belt 10 from sagging, and even when the conveyor belt 10 meanders, it is possible to effectively prevent the ends in the width direction from falling between the return rollers 48, 48, and the conveyor belt 10 is in a normal state. It also has the advantage that it can be easily restored.

Further, since the contact area of the conveyor belt 10 supported by the return roller device 14 with the return roller 48 is very small compared to the width of the belt, objects to be conveyed such as ores attached to the conveyor belt 10 The amount of the material that hits the return roller 48 and falls is extremely reduced. Over time, these fallen objects accumulate at the bottom of the conveyor system, and it takes a lot of effort to dispose of them. However, if the belt is rotated while attached to the belt, there is no need to dispose of it. Reducing the amount of falling objects is extremely effective in eliminating unnecessary effort.

Furthermore, since the roller width is narrow, the amount of objects to be transported that adheres to the return roller 48 itself is small, and does not cause meandering of the conveyor belt 10. Note that since the width of the abutting member 60 is narrow, frictional force with the conveyor belt 10 becomes a problem.
In No. 2, since a portion thereof is buried, it is completely prevented from coming off from the roller body 50 during use.

In addition, the return roller device 1 in this embodiment
The return roller 48 of No. 4 has a metal sleeve 64 on its inner circumference, and is fixed to the outer circumference of the outer tube 44 with a fixing screw 66 screwed into the metal sleeve 64. From a certain place,
It can be done very strongly.

Although a preferred embodiment according to the present invention has been described in detail above, this is a literal illustration, and the present invention is by no means to be construed as being limited to such specific example. Without departing from the spirit of the invention, it is possible to implement the invention in forms with various changes, modifications, improvements, etc. based on the knowledge of those skilled in the art, and the present invention includes such embodiments. That goes without saying.

For example, the return roller device according to the present invention is
Not only can it be applied to conveyor devices with various belt widths, but also the number and position of the return rollers can be changed as appropriate depending on the width, conveyance, etc.

Moreover, the return roller device according to the present invention is
As mentioned above, by simply changing the inner cylinder member and outer cylinder member to ones with lengths that match the conveyor device,
It can be applied to conveyor devices of various widths, and in that case, the mounting bracket 24 for supporting the shaft member relative to a predetermined stationary member will also normally be adjusted depending on the length of the return roller device. The mounting bracket 68 or the mounting bracket 70 as shown in FIGS.
It is preferable to have a structure that can be easily replaced.

[Brief explanation of the drawing]

FIG. 1 is a front view of a return roller device as an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part of the return roller device shown in FIG. 1. In addition, Figures 3 and 4 respectively represent the first
In the return roller device shown in the figure,
FIG. 7 is a cross-sectional view showing other shapes of mounting fittings that may be applied. 10: Conveyor belt, 12: Mounting bracket, 14: Return roller device, 16: Mounting shaft, 18: Inner tube, 24: Mounting bracket, 32: Bearing, 34: Support roller, 44: Outer tube, 48:
Return roller, 50: roller body, 60: contact member, 64: metal sleeve.

Claims (1)

[Claims for Utility Model Registration] A carrier roller device is disposed below a conveyor belt section for supporting a conveyor belt section on which an object to be conveyed is placed, and the conveyor roller device is arranged below the conveyor belt section on which an object to be conveyed is placed. A return roller device for supporting the portion of the conveyor belt on which the conveyed object is not placed, which is returned to the conveyance starting point, is arranged concentrically at both ends of the conveyor belt in the width direction, and is arranged at a predetermined position. two opposing shaft members fixedly and non-rotatably supported by a stationary member; located in the width direction of the conveyor belt, the two shaft members are fitted into both ends; a cylindrical inner cylinder member that is removably attached and connects the shaft members; a support roller of a predetermined outer diameter that is rotatably attached to each of the two shaft members; and a radial direction of the inner cylinder member. a cylindrical outer cylinder member arranged concentrically at a predetermined distance on the outside, detachably attached to the support roller, and rotatable together with the support roller; an outer circumferential surface that is detachably attached to the outer cylindrical member, is fixed at a predetermined position such that the spacing is narrower at both end portions of the outer cylindrical member than at the center portion, and rotates integrally with the outer cylindrical member; A return roller device comprising: a plurality of narrow return rollers for supporting the conveyor belt, each having a semicircular or arcuate hard urethane protrusion.