JPH0641925Y2 - Tubular belt conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tubular belt conveyor used for transporting coal, minerals, grains, and other bulk materials.

<Prior art> Conventionally, there is a tubular belt conveyor that rolls one belt (particularly, a rubber belt) into a tubular shape in the longitudinal direction, and wraps and conveys the transported loose material received from the hopper to prevent it from spilling. Are known.

As shown in FIGS. 5 to 7, a head pulley 2 for driving and driving the belt 1 is provided at the tip of the tubular belt conveyor, and a tail pulley 3 is provided at the rear end of the tubular belt conveyor. There is. The belt 1 is composed of a carrier side 1a for loading and transporting bulk materials and a return side 1b deflected by the head pulley 2 and returning toward the tail pulley 3. As shown in FIG. 7, FIG. 9 and FIG. 10, the support frame 10 having a plurality of rollers 11 at one position at a predetermined interval over the substantially entire length of the belt 1 has a support frame 10 of the belt 1. It is arranged around the carrier side 1a and the return side 1b. A support frame with a rounding roller for forming the belt 1 from the flat cross section to the O cross section shown in FIG. 8 is provided at the flat-U type transition portion 6 on the carrier side 1a of the belt 1 which is in the vicinity of the tail pulley 3. (Not shown) is arranged in contact with the belt 1,
A support frame with a developing roller (not shown) for deploying the belt 1 from the O-shaped cross section to the flat cross section is provided on the U-shaped to flat-shaped transition portion 7 of the carrier side 1a of the belt 1 which is in the vicinity of the head pulley 2. ) Is arranged in contact with the belt 1. A holding roller supporting frame 10 for holding the O-shaped cross section of the O-shaped running portion 13 of the belt 1 is provided on the belt 1 between the rounding roller supporting frame and the developing roller supporting frame. It is placed in contact.

In the O-shaped traveling portion 13 of the belt 1, the belt 1 is
The opposite edges 1c and 1d are rounded so that they overlap, as shown in FIGS. 7 and 10. However, there is also an example in which both side edges of the belt 1 are made thick and the both side edges of the thickened belt 1 are abutted against each other.

The flat-U type transition portion 8 on the return side 1b of the belt 1 faces the U-type flat transition portion 7 near the head pulley 2 and
A supporting frame with a rounding roller is arranged and faces the flat-U type transition portion 6 near the tail pulley 3 and the return side of the belt 1
A support frame with a developing roller is arranged in the U-shaped flat transition portion 9 of 1b.

In each of the supporting frames with holding rollers, four guide rollers 11 are arranged at equal intervals in the circumferential direction of the O-shaped cross section of the belt 1 at the installation positions in the longitudinal direction of the belt 1 (see FIGS. 9 and 10).
(See the figure), 6 (see FIG. 7) or 8 are arranged.

An object receiving portion 5 is disposed above the flat-U type transition portion 6 near the tail pulley 3. This transported object receiving section 5
An input hopper 4 is installed on the upper part of the. Bulk 12
From the input hopper 4 through the conveyed object receiving section 5, the belt 1 is loaded on the flat-U type transition section 6 on the carrier side 1a. As the belt 1 moves, the loaded loose material is transferred to the O-type traveling unit 13
Through the U-shaped to flat-shaped transition portion 7 near the head pulley 2 and discharged from the belt 1.

The above-mentioned conventional tubular belt conveyor does not cause pollution of fine powder because the transported object does not leak from the belt (particularly the O-shaped traveling section) during the transportation, and the curve can be freely set in the traveling path of the belt. Moreover, the width of the cross section of the entire belt conveyor is smaller than half of that of a conventional belt conveyor, and therefore, it is particularly suitable for conveying bulk materials.

<Problems to be solved by the invention> However, the filling rate of the loose materials in the O-shaped running portion of the belt is apt to cause temporary overfilling of the belt due to intermittent feeding to the feeding hopper (or feeder). The thing is
It will be constrained by the inner surface of the belt and compressed. The individual shape of the bulk is generally indefinite, but if these bulks are angular, for example coal or mineral, the coal or mineral is tubular because the entire cross section of the tubular belt is constrained by rollers. Because the corners of coal or mineral cannot escape in the radial direction of the belt cross section and strongly rubs the belt as it passes through the supporting frame with rollers, the belt is gradually damaged and the running resistance of the belt significantly increases. Therefore, an excessive load is likely to be applied to the motor that drives the head pulley and the tail pulley, and the motor will be burned. Also, in the case of adherent conveyed goods, it adheres to the inner surface of the belt. Furthermore, there are many transported objects that are easily deformed or damaged by compression. In order to avoid these obstacles, operational monitoring is necessary to keep the filling rate of the belt low at all times, and long-term safe driving is difficult without substantially reducing the usage efficiency of the belt. . That is,
An excessively large cross-section (belt diameter) is used as compared with a predetermined transport amount, a drive (motor) pulley with an excessive horsepower is required, and an excessive size of the entire belt conveyor is inevitable.

Therefore, the object of the present invention is to eliminate the drawbacks of the prior art, to improve the transport efficiency, to prevent the damage of the loaded object and the belt, and to reduce the running resistance of the belt to reduce the load of the driving source. It is to provide a conveyor.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a tubular belt having a plurality of rollers for holding the belt that is tubularly rolled in the longitudinal direction and deployable in a plane as the tubular shape. In a tubular belt conveyor in which a plurality of supporting frames with rollers arranged on the circumference of the cross section of the tubular belt in contact with the outer peripheral surface of the tubular belt are arranged at predetermined intervals in the longitudinal direction of the tubular belt, a plurality of supporting frames with rollers are provided. The rollers are on the upper side of the cross section of the tubular belt.
A plurality of rollers are arranged in a position not contacting at least both side edges on the circumference of the tubular belt within 180 °, and a plurality of rollers are provided in another roller support frame apart from or adjacent to the roller support frame by a certain number. 180 ° above and below the circumference of the cross section
It is characterized in that the combination of the pair of support frames with rollers arranged inside is repeated along the longitudinal direction of the tubular belt (claim 1).

Further, the one support frame with rollers and the other support frame with rollers may be arranged alternately (claim 2).

In addition, at least the specific arrangement of the support frame with rollers is at least
Although the purpose is achieved if it corresponds to the conveying side of the belt, the supporting frame with rollers on the return side of the belt may have the same structure as that of the conveying side, or may have a longer pitch to have the same structure.

<Operation> When the tubular belt filled with the object to be conveyed passes through the supporting frame with rollers, only one half of the outer peripheral surface of the tubular belt hits the guide roller. Escape to the other half of the outer peripheral surface of the tubular belt where is not attached to facilitate passage of the tubular belt through the supporting frame with rollers. In addition, the guide roller is attached to the other support frame with rollers on the opposite side to the one support frame with rollers, and the tubular shape of the belt is maintained.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. The entire tubular belt conveyor of the present invention is similar to that shown in FIG. 5 showing the prior art, in which a rubber belt 1 is stretched between a head pulley 2 and a tail pulley 3. The carrier side 1a of the belt 1 is composed of the flat-U type transition section 6, the O-type running section 13 and the U-type flat type transition section 7, and the return side 1b of the belt 1 is the flat-U type transition section 8. , O
It consists of a mold run 13 and a U-flat transition 9. Belt 1
Support frames with rollers are arranged around the belt 1 at predetermined intervals in the longitudinal direction. The pitch between the support frames with rollers is
It is the same as or slightly smaller than that of the conventional tubular belt conveyor.

FIG. 1 shows an O-shaped traveling portion 13 of the belt 1 and supporting frames 14a, 14b and 1 with holding rollers arranged around the O-shaped traveling portion 13.
4c is shown.

As shown in FIG. 1 and FIG. 2 (A), the lower half of the supporting frame 14a with a holding roller has an angle of 45 ° with respect to the center plane 15 of the vertical position of the O-shaped running portion 13. A pair of guide rollers 11 are attached with an attaching shaft angle. The peripheral surfaces of these guide rollers 11 contact the outer surface of the lower half of the belt 1,
As a result, the belt 1 is restrained so that the roundness of the O-shaped traveling portion 13 is maintained. Since the guide roller 11 is not provided in the upper half portion of the supporting frame 14a with a holding roller, the belt 1
The bulge on the upper half side of the O-shaped running portion 13 is not restricted at all. Therefore, the both side edges 1c and 1d of the belt 1 are butted in a substantially closed state due to the effect of being restrained by the guide rollers in the upper half of the supporting frame with a holding roller at the front position (not shown). .

As shown in FIG. 1 and FIG. 2 (B), in the upper half of the supporting frame with a holding roller 14b, 45 with respect to the center plane 15 is provided.
A pair of guide rollers 11 are attached with an attachment axis angle of °. The peripheral surfaces of these guide rollers 11 are rollingly engaged with the outer peripheral surface of the upper half of the belt 1, so that both side edges 1c and 1d of the belt 1 are closed and the roundness of the O-shaped running portion 13 is maintained. The belt 1 is restrained. Since the guide roller 11 is not provided in the lower half of the supporting frame 14b with a holding roller, the bulge on the lower half of the O-shaped running portion 13 of the belt 1 is not restrained at all. Therefore, the transported object 12 escapes toward the lower half of the O-shaped traveling section 13.

As shown in FIGS. 1 and 2C, the holding roller-equipped support frame 14c has the same structure as the holding roller-equipped support frame 14a.

1 shows only the carrier side 1a and not the return side 1b of the tubular belt conveyor according to the present invention, the line AA in FIG.
FIG. 3 shows a cross-section taken along the line AA of the tubular belt conveyor when the tubular belt conveyor is extended to FIG. In the embodiment shown in FIG. 3, guide rollers 11 are arranged on the carrier side 1a of the belt 1 and the return side 1b of the belt 1 at the same pitch in the longitudinal direction of the belt 1. Moreover, when the guide roller 11 is provided within 180 ° below the supporting frame with the holding roller on the carrier side 1a of the belt 1, the guide roller 11 is also supported on the returning side 1b of the belt 1 with the supporting frame with the holding roller. It is provided within 180 ° below. When the arrangement of the guide rollers 11 on the carrier side 1a of the belt 1 is opposite to that described above, the arrangement of the guide rollers 11 on the return side 1b of the belt 1 is also opposite.

The operation of the tubular belt conveyor of the present invention will be described below. The belt 1 formed in a tubular shape has an object 12 to be conveyed inside.
When passing through the supporting frame 14a with a holding roller in a state of being filled with (especially, angular irregular shaped loose material, etc.), the O
The lower half of the mold running portion 13 is rollingly engaged with and restrained by the pair of guide rollers 11, and the upper half of the O-shaped running portion 13 of the belt 1 is not restrained at all. Escape to the upper half of the O-shaped running portion 13 of the belt 1. Even in this case, the O-type traveling section
The side edges 1c and 1d of the belt 1 located at the upper end of 13 are the second
As shown in Figure (A), it is in a substantially closed state.

Next, when the belt 1 moves between the supporting frames with holding rollers 14a and 14b, neither the upper half portion nor the lower half portion of the O-shaped running portion 13 of the belt 1 is restrained, and therefore, the belt 1 is conveyed. Thing 12
Also, the O-shaped traveling portion 13 is not biased to either the upper half portion or the lower half portion. As a result, the belt 1 maintains a substantially perfect tubular shape, and the side edges 1c and 1d of the belt 1 are also closed.

Next, when the belt 1 passes through the supporting frame with a holding roller 14b, the upper half of the O-shaped running portion 13 of the belt 1 is rollingly engaged with and restrained by the pair of guide rollers 11. O type running part
Since the lower half portion of 13 is not restrained at all, the transported object 12 escapes toward the lower half portion of the O-shaped running portion 13 of the belt 1. In this case, the lower half of the O-shaped running portion 13 of the belt 1 sags, and the belt 1
There is a slight opening between the side edges 1c and 1d. However, if the opening is as shown in FIG. 2 (B), the transported object 12 does not actually leak from the O-shaped traveling portion 13 of the belt 1.

The state when the belt 1 moves between the supporting frames with holding rollers 14b and 14c is almost the same as the state when the belt 1 moves between the supporting frames with holding rollers 14a and 14b.

The state when the belt 1 passes through the supporting frame with holding roller 14c is the same as the state when the belt 1 passes through the supporting frame with holding roller 14a.

As described above, the belt 1 is constrained alternately in the upper half or the lower half while passing through the one and the other supporting frames with rollers while being formed in a tubular shape, and is not constrained in the other half. The supporting frame with rollers of 1 of the present invention can be easily passed, and the supporting frame with a roller having a half-circumferential restraint according to the present invention holds the belt 1 in a tubular shape. It is almost equivalent to the action of holding it in a tubular shape.

The above embodiment is a method in which the upper half part or the lower half part of the tubular belt is alternately constrained by half circumference between the adjacent supporting frames with rollers for a plurality of supporting frames with rollers, but the present invention is limited to this method. Instead of this, for example, the right half part or the left half part of the belt may be alternately restrained by half circumference with both side edges of the belt positioned at the upper end.

Further, for every three or four support frames with rollers, an upper half part or a right half part, or a lower half part or a left half part may be provided with a support frame with a roller for restraining a half circumference. This is particularly suitable for wide tubular belt conveyors.

Further, the guide rollers may be sequentially arranged in a semi-peripheral constraint type for each roller-support frame, with three or more roller-support frames as one unit.

Further, in the above-mentioned embodiment, the support frames with rollers are arranged at the same pitch on both the carrier side 1a and the return side 1b of the belt 1, but as shown in FIG. The support frame with rollers may be provided on the return side 1b with a small number (that is, a pitch larger than that on the carrier side) because the transported object 12 is not filled in the O-shaped traveling section 13.

<Effect of the Invention> According to the present invention described above, the guide rollers are arranged so as to alternately hit one half side and the other half side of the outer peripheral surface of the tubular belt in the one and the other supporting frames with rollers. Therefore, when the belt passes through the support frame with rollers, the transported object inside the tubular belt escapes to the side without the guide roller, so that the tubular shape of the tubular belt is formed by the cooperation of the one and the other support frames with rollers. There is no leakage from the tubular belt of the transported object even if the filling rate of the transported object is almost 100% without losing the holding effect. For this reason, the use efficiency of the belt is improved as compared with the conventional case. Further, it is possible to prevent or reduce the rubbing of the belt due to the transported object (particularly, the angular bulk material), and thereby to prevent the belt from being damaged. In addition, the load on the drive source that drives the belt conveyor can be reduced.
Moreover, since the number of guide rollers can be reduced, the manufacturing cost of the tubular belt conveyor can be reduced and
The maintenance work can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a main part of a tubular belt conveyor according to an embodiment of the present invention, FIG. 2 (A),
(B) and (C) are respectively AA in FIG.
Line, BB line and CC line sectional view, FIG. 3 is a sectional view of the tubular belt conveyor taken along the line AA of the tubular belt conveyor of FIG. FIG. 5 is a sectional view of the tubular belt conveyor according to another embodiment of the present invention taken along the line AA corresponding to FIG. 3, FIG. 5 is a side view of the entire tubular belt conveyor according to the prior art, and FIG. , A plan view of the tubular belt conveyor of FIG. 5, FIG. 7 is a sectional view of a supporting frame with rollers in the tubular belt conveyor of FIG. 5, FIG. 8 is an enlarged transverse sectional view of the tubular belt, and FIG. 5 is an enlarged side view of the main part of the tubular belt conveyor shown in FIG. 5, and FIG. 10 is a sectional view taken along line XX in FIG. 1 ... Belt, 1a ... Carrier side of belt 1, 11 ... Guide roller, 13 ... O-shaped traveling part, 14a, 14b and 14c ... Support frame with holding roller.

Claims (2)

[Scope of utility model registration request] 1. A plurality of rollers are arranged on the circumference of the cross section of the tubular belt in contact with the outer peripheral surface of the tubular belt in order to hold the belt which is tubularly rolled in the longitudinal direction and expandable in a plane as the tubular shape. In a tubular belt conveyor in which a plurality of supporting frames with rollers are arranged at predetermined intervals in the longitudinal direction of the tubular belt, a plurality of rollers in one supporting frame with rollers are at least 180 ° on the upper side on the circumference of the tubular belt cross section. A plurality of rollers are arranged at positions not contacting both side edges on the circumference of the tubular belt, and a plurality of rollers are provided on the upper and lower sides of the cross section of the tubular belt in another supporting frame with rollers which is separated from or adjacent to the supporting frame with a certain number. A tubular belt conveyor, wherein the tubular belt conveyor is arranged within 180 °, and the combined arrangement of the pair of support frames with rollers is repeated along the longitudinal direction of the tubular belt. 2. The tubular belt conveyor according to claim 1, wherein the one support frame with rollers and the other support frame with rollers are arranged alternately.