JP2003192114A - Belt automatic aligning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt automatic aligning device capable of corresponding to reciprocal travelling of a conveyor belt. <P>SOLUTION: This belt automatic aligning device is constituted so that each of pairs of left and right side rollers 34a, 34b and 34a', 34b' faces against belt both side edges 13a, 13b advancing on return rollers 21, 21' by axially supporting a center of a horizontal direction revolving frame 15 on a frame 14 with a revolution axis P1, axially supporting the return rollers 21, 21' having left and right direction rotation axes 23, 23' free to be orthogonal with the forwarding direction of the conveyor belt 13, axially supporting side roller mounting plates 28, 28' on both end sides of the revolving frame 15 free to horizontally revolve with their centers as revolving centers Q, Q' and axially supporting each of the pairs of the side rollers 34a, 34b and 34a', 34b' on the front side and the rear side in the belt forwarding direction with each of the revolving centers Q, Q' as standards on the both side roller mounting plates 28, 28'. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt automatic centering device for centering meandering of a conveyor belt.

[0002]

2. Description of the Related Art In a conventional side roller type belt self-centering device, as shown in FIGS. 10 and 11, when used on the return side of a belt conveyor 9, a swivel shaft 2a is provided at the center of a fixed frame 1. Provided is a revolving frame 2 capable of revolving around a central axis P of the revolving shaft 2a in a horizontal plane, and a return roller 4 is axially supported between bearings 3 and 3'fixed at both ends of the frame 2, In addition, L-shaped levers 5 and 5'are connected to both ends of the revolving frame 2 in parallel with the belt traveling direction, and side roller support rods 6 and 6'are respectively attached to the rear ends of the L-shaped levers 5 and 5 '. It is constructed by standing upright and supporting side rollers 7, 7'on the supporting rods 6, 6 ', respectively.

Then, the belt 8 on the retan side advances on the retan roller 4 in the direction of arrow A in FIG. 11, but when the belt 8 meanders in the left and right direction and moves in the direction of arrow B in FIG. 10, for example, The side edge 8a of the belt 8 contacts the side roller 7, and a force is applied to the roller 7 in the belt traveling direction (arrow AB direction), so that the revolving frame 2, that is, the horizontal roller 4 is centered on the revolving shaft 2a. As a result, the belt 8 turns in the direction of arrow C by a predetermined angle and advances in the direction of arrow A.
And a frictional force between the return roller 4 and the rotating roller 4 which is inclined with respect to the traveling direction, a force for pushing the belt 8 back to the center acts on the belt 8, and as a result, the belt 8 is moved to the inside ( It was pushed back to the central part) to return to normal operation.

[0004]

By the way, in the above-mentioned conventional belt self-centering device, the side edges of the belt are brought into contact with the side rollers 7 or 7'mounted on the rear side of the levers 5 and 5 ',
Since the function of returning the belt to the center by the return roller 4 is achieved after the turning frame 2 is turned, it is applicable only when the traveling direction of the belt 8 is the direction of arrow A in FIG. There was a problem that it could not be applied to a reverse direction belt conveyor.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a belt automatic centering device applicable to a forward / reverse direction driven belt conveyor.

[0006]

In order to achieve the above-mentioned object, the present invention firstly provides a machine frame (fixed frame 14) with a center of a horizontal revolving frame (15) as a revolving shaft (P1). And a belt support roller (return roller 21, 21 ') having a left-right rotation shaft (23, 23') which can be orthogonal to the traveling direction of the conveyor belt (13) is pivotally supported on the revolving frame (15). , A standing roller mounting member (side roller mounting plate 2) on both ends of the revolving frame (15).
8, 28 ') with its center as the turning center (turning axis Q, Q')
As a pivotal support on the conveyor belt (13) so that the conveyor belt (13) can swivel in the direction toward and away from the conveyor belt (13).
8 '), the pair of standing rollers (side rollers 34a, 34b) (34a', 34a) on the front side and the rear side in the belt traveling direction with reference to the respective turning centers (Q, Q ').
b ′) is pivotally supported, and the belt supporting rollers (21, 2) are
1 ') A belt self-centering device characterized in that the pair of left and right upright rollers can be opposed to both side edges (13a, 13b) of the belt traveling upward. Is.

When the belt support roller is used on the return side of the belt conveyor, it is preferable that the belt support roller is constituted by, for example, a return roller (21, 21 ') which is divided into left and right parts, but an integrally formed return roller. It can also be configured by. When used on the carrier side, the belt supporting roller may be a carrier roller. The standing rollers are a pair of side rollers (34a, 34b) supported on the right end side of the revolving frame (15) and a pair of side rollers (34a ', 34a', supported on the left end side of the revolving frame (15). 34
b ′). The standing roller mounting member is, for example, a side roller mounting plate (28, 28 ').
The side roller mounting plate (28, 28 ')
The pivoting centers (Q, Q ') of the revolving frame (15) are pivotally supported on both ends of the revolving frame (15) so as to be reciprocally movable toward and away from the conveyor belt (13) (for example, in the horizontal direction). ) (34a ', 34b') can be configured so as to be horizontally turnable, for example, in a horizontal plane with each turning center (Q, Q '). Further, it is preferable that the standing roller mounting member is configured by a plate-shaped member that is linear in the front-rear direction, but the present invention is not limited to this, and a shape that is bent in the front-rear direction from the turning center or a shape that is curved in the same direction. Various other shapes such as those described above can be used. According to this structure, no matter whether the belt (13) is running in the forward or reverse direction, the belt is biased to the right or left, or to the right or left. Based on the contact of the belt side edge with the right or left standing roller (34a, 34b or 34a ', 34b') due to the deviation of the belt, the swivel frame swivels at a predetermined angle according to the belt traveling direction, The belt can be returned toward the center by the frictional force between the supported belt supporting roller and the belt, and thus the belt can be aligned regardless of the traveling direction of the belt.

Secondly, the standing rotation shafts (side roller rotation shafts P2, P2) (P2 ', P) of the pair of standing rollers.
2 ') connecting front and back (side roller mounting center line L
2, L2 ') is configured so as to be parallel to the traveling direction of the belt, and is configured by the belt self-centering device according to the first aspect.

Therefore, in the state where the revolving frame (15) is revolving, the pair of upright rollers (34a, 3a).
4b or 34a ', 34b') are belt side edges (13a
Alternatively, since it can be in contact with 13b), stable centering of the belt can be performed regardless of the belt traveling direction.

Thirdly, the respective turning centers (Q, Q ') of the upright roller mounting member are along the straight lines (L2, L2') connecting the upright rotation axes of the upright rollers in the front-rear direction and the left-right rotation axis. The belt self-centering device according to the first or second aspect is characterized in that it is an intersection with a straight line (roller mounting center line L1).

Fourth, the standing rotation shafts (P2, P2) (P2 ', P2') of the pair of standing rollers are located equidistant from the center of rotation (Q, Q ') of the standing roller mounting member. It is constituted by the belt self-centering device according to any one of the first to third aspects.

With this structure, the same self-centering effect can be obtained for the forward and reverse running of the belt.

Fifth, the belt supporting rollers (21, 2)
1 ') is divided into left and right parts, and is constituted by the belt self-centering device according to any one of the first to fourth aspects.

According to this structure, the revolving frame (1
It is possible to improve the swirling property of the swivel axis (P1) in 5).

In this section, the reference numerals of the constituent elements in the embodiments corresponding to the respective configurations of the present invention are shown in parentheses, but these are merely added for convenience in order to clarify the correspondence. Of course, the present invention is not limited to the above-mentioned components.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. The belt self-centering device according to the present invention is
Although it can be applied to both the retan side and the carrier side of the belt conveyor, the case where the same device is applied to the retan side will be described below.

FIG. 1 (a) is a front view of a belt automatic centering device 11 according to the present invention, FIG. 1 (b) is a side view of the same centering device 11, and FIG. This is the case where it is provided on the return side 12 and the return belt 13 is in contact with the return rollers (belt support rollers) 21, 21 'of the apparatus 11 in the direction of arrow M (forward) or N (back). It is driven by.

Reference numeral 14 is a fixed frame (machine frame) having a substantially U-shape when viewed from the front, and is fixed below the belt 13 at a proper position on the return side of the conveyor 10 in a direction orthogonal to the traveling direction of the belt 13. Has been done. In addition, this automatic centering device 11
A plurality of conveyors 10 can be installed on the return side of the conveyor 10 at predetermined intervals.

Reference numeral 15 denotes a horizontal swivel frame having an L-shaped cross section which is pivotally supported by a swivel shaft portion 16 at the center (upper surface central portion) of the fixed frame 14, and is a center line in the traveling direction of the conveyor belt. With respect to the fixed frame 14, the rotation axis P1 which is located below O (see FIG. 5) and which is the rotation center of the rotation shaft portion 16 is the center, and in the horizontal plane parallel to the belt surface with respect to the arrow G direction and the arrow H. It is provided so as to be rotatable at a fixed angle in the direction (see FIG. 5). The turning shaft portion 16
Is composed of a mounting plate 17 welded to the lower surface of the central portion of the revolving frame 15, a center shaft bolt 18 and a bearing 19 mounted downward on the mounting plate 17, and the center as the revolving shaft P1. By inserting the axial bolt 18 from the upper surface side of the fixed frame 14 into the center through hole of the frame 14, the revolving frame 15 is moved to the arrow G, H.
It can turn in any direction.

Numerals 20 and 20 'denote turning angle regulating plates which are erected and fixed on both left and right sides of the turning shaft portion 16 on the fixed frame 14, and as shown in FIG. A gap t is formed between the upper end corners of the restriction plates 20 and 20 ′ and the inner surface of the revolving frame 15 when the position is orthogonal to the belt traveling direction. Therefore, the swivel frame 15 can swivel in the directions of the arrows G and H at a constant angle within the range of the gap t.

Reference numerals 21 and 21 'denote return rollers provided on the revolving frame 15 so as to be divided into left and right parts, and are mounted at positions equidistant from the revolving axis P1 in the left-right direction. These rollers 21, 21 'are
Bearing 2 erected on the right end side on the revolving frame 15
2a and a bearing 22b erected near the center, and between a bearing 22a 'erected on the left end side on the revolving frame 15 and a bearing 22b' erected near the center, each being orthogonal to the belt traveling direction. Possible horizontal rotation axis (horizontal rotation axis) 23,
The conveyor belt 13 on the return side 12 advances in the arrow M direction or the arrow N direction while contacting the upper surfaces of the rollers 21 and 21 '. It should be noted that the rollers 21,
A straight line passing through the centers of the horizontal rotary shafts 23 and 23 'of 21' is referred to as a roller mounting center line L1 (see FIG. 5).

Reference numerals 24 and 24 'denote the horizontal turning frame 15 described above.
Is a side roller portion provided at both left and right ends of the roller so as to be rotatable in the directions of arrows I and J in the horizontal plane about the pivot axes Q and Q '(see FIGS. 4 and 5).
Since the configurations of 4 and 24 'are bilaterally symmetrical with respect to the turning axis P1, the right side roller portion 24 in FIG. 1 will be described, and the left side roller portion 24' in FIG. "" Is added to indicate in parentheses.

In the side roller portion 24 (24 ') (see FIG. 4), reference numeral 25 (25') is a rectangular turning portion mounting plate, which is provided on the lower surface of the right end portion (lower surface of the left end portion) of the turning frame 15. The longitudinal direction is welded 26 (26 ') in a direction orthogonal to the frame 15, that is, parallel to the traveling direction of the belt 13. This turning portion mounting plate 25 (2
On the plate surface of 5 '), a through hole 27 (27') for mounting a side roller mounting plate 28 described later is formed at the center of the plate surface on the extension line of the roller mounting center line L1.

Reference numeral 28 (28 ') is a side roller mounting plate, and the mounting plate 28 (28') is the turning portion mounting plate 25.
(25 ') and a rectangular plate member having a width substantially the same as that of the mounting plate 25 (25') and slightly longer in the belt traveling direction (front-back direction). ') Is formed, and a concentric sleeve-shaped swivel part bearing 29 (29') is welded 30 (30 ') downward in the through hole 29a (29a').
The side roller mounting plate 28 (28 ') is attached to the bearing 2
9 (29 ') through the through hole 27 (27') of the mounting plate 25 (25 ') from the lower side of the swivel mounting plate 25 (25').
, The bolt 31 (31 ') as the swivel axis Q (Q') is inserted into the swivel part bearing 29 (29 ') from below, and the swivel part mounting plate 25 (25') is attached to the upper surface side. Female screw portion 31a (31a ') of the bolt 31 (31') that has been taken out
By screwing the nut 32 (32 ') onto the mounting plate 25 (25') on the lower surface side of the mounting plate 25 (25 '), the mounting plate 25 (25') is centered on the rotating shaft Q (Q '). It is provided so that it can be horizontally swung at a constant angle in the directions of arrows I and J (direction toward and away from the conveyor belt 13).

33a, 33b (33a ', 33b')
Are a pair of side roller support rods symmetrically erected and fixed in the front-rear direction at both ends 28a, 28b (28a ', 28b') in the front-rear direction of the side roller mounting plate 28 (28 '). Rods 33a, 33b (33a ', 33
b ') a pair of side rollers 34a, 34b (3
4a ', 34b') are side roller rotation shafts P2, P2
It is rotatably supported around (P2 ', P2'). These side roller support rods 33a, 33b (3
3a ', 33b'), that is, side rollers 34a, 34b
(34a ', 34b') is the side roller mounting plate 2
8 (28 ') is a symmetrical position on the front side and the rear side in the belt traveling direction with reference to the turning center Q (Q'), and the rotation axes P2, P2 (P2 ', P2') are the rotation axes. Q
It is attached at a position equidistant from (Q ').

The side roller rotating shafts P2 and P2
At the intersection of the side roller mounting center line L2 (L2 ') which is a straight line connecting (P2', P2 ') and the roller mounting center line L1, the turning axis Q (Q ') Is located. Therefore, the side rollers 34a, 34b (34a ', 34b)
b ′) is attached at a position equidistant from the roller attachment center line L1 to the front side and the rear side in the belt traveling direction, and the center line L2 (L2 ′) is attached to both side edges 13a and 13b of the belt 13. It is configured so that it can be positioned parallel to (see FIG. 5). In addition, these side rollers 34
The a and 34b (34a 'and 34b') are mounted so as to have a height that slightly protrudes above the upper surface of the return roller 21, 21 '.

As described above, side roller mounting plates 28, 28 'are pivotally supported at both ends of the revolving frame 15 so as to be horizontally rotatable so as to be close to and away from the conveyor with the center thereof as the revolving axes Q, Q'. Both side roller mounting plates 28, 28 '
A pair of side rollers 34a, 34 on the front side and the rear side of the belt with respect to the turning axes Q, Q '.
a and 34a ', 34b' are pivotally supported to support the roller 2
A pair of left and right side rollers 34a, 34b and 34 are respectively provided on both side edges 13a and 13b of the belt which travel on 1, 21 '.
It is configured such that a'and 34b 'can face each other. And
When the belt 13 running on the rollers 21 and 21 'meanders to the right or left, the right side edge 13a or the left side edge 13b of the belt 13 is the right side roller 34.
a, 34b or left side rollers 34a ', 34b'
Always contact the side rollers 34a, 3
4b or 34a ', 34b' is configured to rotate in accordance with the belt traveling direction. Therefore, with respect to the forward and reverse running of the belt 13, the belt offset preventing automatic adjusting force having the same effect is exerted.

Since the present invention is constructed as described above, when the conveyor belt 13 on the return side 12 is normally moving (in the direction of arrow M or N), the roller 21 is moved as shown in FIG. , 21 'are orthogonal to the belt 13, and the belt 13 advances in the arrow M direction or the arrow N direction while being in contact with the rollers 21, 21'. At this time, the side rollers 34a, 34b, 34a ', 34b'
Does not contact the belt 13 and maintains a position substantially parallel to the belt traveling direction.

Here, when the conveyor belt 13 is moving in the direction of the arrow M (FIG. 6) and the belt 13 meanders and shifts to the right direction (direction of the arrow V) in the figure, the belt 13 moves. The right side edge 13a is the right side roller portion 24
The side rollers 34a and 34b simultaneously contact. The side rollers 34a, 34b rotate in the direction of arrow S by contact with the right side edge 13a of the belt, and the side rollers 34a, 3b are rotated.
Since a force in the belt advancing direction (direction of arrow M) acts on 4b, these rollers are pushed in the belt advancing direction, whereby the revolving frame 15 is rotated about the revolving axis P1 by the rollers 21 and 21 'and the arrow H together. Turn in the direction. During the turning of the turning frame 15, both side rollers 3 are
Since the belt right side edge 13a is always in contact with 4a and 34b, the revolving frame 15 relatively revolves around the revolving axis Q of the side roller mounting plate 28, and the pair of side rollers 34a and 34b. Both of the rollers 34b are always in contact with the right side edge 13a of the belt, that is, the side roller mounting center line L2 of the rollers 34a, 34b is kept parallel to the belt traveling direction.

When the revolving frame 15 revolves, the rollers 21, 21 'on the revolving frame 15 cause the belt 1 to move.
The rollers 21 and 21 'rotate in this inclined state (see FIG. 6). At this time, the roller 21 rotating in the above-mentioned inclined state,
Due to the frictional force between the belt 21 'and the belt 13, a force in a direction orthogonal to the rollers 21, 21' acts on the belt 13, and the belt 13 is returned in the direction of the arrow W, so that the belt 13 Is returned to the center and returned to the normal running shown in FIG. 5, and the rollers 21 and 21 'also turn backward in the direction of arrow G along with the return of the belt and return to the state of FIG. 5 orthogonal to the belt traveling direction. To do.

On the other hand, as shown in FIG. 7, when the conveyor belt 13 is also traveling in the direction of arrow M,
When the belt 13 meanders and shifts to the left (the direction of arrow W), the left edge 13b of the belt 13 simultaneously contacts the side rollers 34a 'and 34b' of the left side roller portion 24 ', and the side roller 34a. Since ', 34b' rotates in the direction of arrow T and is pushed in the belt traveling direction (direction of arrow M), the swivel frame 15 swivels in the direction of arrow G about the swivel axis P1. Incidentally, since the left side edge 13b of the belt is always in contact with the side rollers 34a 'and 34b' during the turning of the turning frame 15, the turning frame 15 similarly causes the turning shaft of the side roller mounting plate 28 'to rotate. Since the pair of side rollers 34a ', 34b' are constantly in contact with the belt side edge 13b, that is, the roller 3 is rotated about Q '.
The side roller mounting center line L2 'of 4a' and 34b 'is maintained in parallel with the belt traveling direction.

When the revolving frame 15 revolves, the rollers 21, 21 'on the revolving frame 15 cause the belt 1 to move.
3, the rollers 21 and 21 'rotate in the inclined state (see FIG. 7). At this time, the roller 21 rotating in the above-mentioned inclined state,
Due to the frictional force between the belt 21 'and the belt 13, a force in a direction orthogonal to the rollers 21, 21' acts on the belt 13, and the belt 13 is returned in the direction of the arrow V, so that the belt 13 is The rollers 21 and 21 'are returned to the center and restored to the normal running shown in FIG. 5, and the rollers 21 and 21' are turned backward in the direction of the arrow H along with the return of the belt to be returned to the state of FIG. 5 orthogonal to the belt traveling direction. .

Due to the above-mentioned operation, the meandering of the belt 13 traveling in the direction of the arrow M can be prevented.

Next, when the traveling direction of the belt 13 is traveling in the opposite direction (direction of arrow N), the basic operation is the same. That is, as shown in FIG. 8, when the conveyor belt 13 meanders and moves in the right direction (direction of arrow V) in the figure in a state where the conveyor belt 13 is moving in the direction of arrow N, the right side of the belt 13 The edge 13a simultaneously contacts the side rollers 34a and 34b of the right side roller portion 24. The side rollers 34a, 34b rotate in the arrow T direction due to the contact with the belt right side edge 13a, and a force in the belt traveling direction (arrow N direction) acts on the side rollers 34a, 34b. Axis P
Turn around 1 in the direction of arrow G. During the turning of the turning frame 15, similarly to the above, the side roller 3 is
Since the belt right edge 13a is always in contact with the belts 4a and 34b, the revolving frame 15 relatively revolves around the revolving axis Q of the side roller mounting plate 28, and the side rollers 34a and 34b are rotated. Both of them maintain a state where they are always in contact with the right side edge 13a of the belt, that is, a state where the side roller mounting center line L2 of the rollers 34a and 34b is parallel to the belt traveling direction.

When the revolving frame 15 revolves, the rollers 21 and 21 'on the revolving frame 15 cause the belt 1 to move.
3 is inclined by an angle of −θ and comes into contact therewith, and the rollers 21 and 21 ′ rotating in such an inclined state and the belt 1
Due to the frictional force between the roller 13 and the belt 13,
1'acts a force in a direction orthogonal to the belt 1 so that the belt 13 is returned in the direction of the arrow W, so that the belt 13 is returned to the center and restored to the normal running shown in FIG. ′ Also reversely turns in the direction of the arrow H along with the return of the belt and returns to the state of FIG. 5 orthogonal to the traveling direction of the belt.

Further, as shown in FIG. 9, when the belt 13 meanders and moves to the left (direction of arrow W) while the conveyor belt 13 is also traveling in the direction of arrow N, the belt 13 The left edge 13b simultaneously contacts the side rollers 34a ', 34b' of the left side roller portion 24 ', the side rollers 34a', 34b 'rotate in the arrow S direction and are pushed in the belt traveling direction (arrow N direction). Therefore, the revolving frame 15 revolves in the direction of arrow H about the revolving axis P1. In addition, this turning frame 1
Similarly, during the turning of 5, the pair of side rollers 34
Both a'and 34b 'maintain a state in which they are always in contact with the belt side edge 13b, that is, the side roller mounting center line L2' of the rollers 34a 'and 34b' is parallel to the belt advancing direction.

When the revolving frame 15 revolves, the rollers 21, 21 'on the revolving frame 15 are moved by the belt 1.
3 and the roller 21 and 21 ′ that rotate in such an inclined state and the belt 13 described above.
Due to the frictional force between the rollers 13 and 21,
1'applies a force in a direction orthogonal to the belt 1 to return the belt 13 in the direction of arrow V, so that the belt 13 is returned to the center and restored to the normal running shown in FIG. ′ Also turns backward in the direction of arrow G as the belt returns and returns to the state of FIG. 5 which is orthogonal to the belt traveling direction.

With the above-described operation, the meandering of the belt 13 traveling in the direction of the arrow N can be prevented. Therefore, according to the self-centering device 11 of the present invention, the same self-centering effect can be obtained regardless of whether the conveyor belt 13 travels in the arrow M direction or the arrow N direction.

As described above, according to this embodiment, the straight line (roller mounting center line L1) along the horizontal rotation shafts 23, 23 'of the return roller 21, 21' is used as a reference to the front side and the rear side in the belt traveling direction. A pair of side rollers 34a,
34b and 34a ', 34b' are provided, and the pair of side rollers are arranged at both ends of the revolving frame 15 so as to be horizontally revolvable, so that the belt is aligned regardless of the traveling direction of the conveyor belt 13. It is possible to realize a belt centering device that can be carried out and is applicable to a belt conveyor that can be driven in the forward and reverse directions.

The side roller rotation shafts P2, P2, P
Since 2'and P2 'are located at equal distances from the turning axes Q and Q', the belt offset preventing automatic adjustment force, that is, the automatic centering effect, which has the same effect on the forward and reverse running of the belt, is provided. It can be demonstrated.

Further, since the return roller 21 and 21 'are divided into the left and right parts, it is possible to improve the turning performance about the turning axis P1 of the turning frame. That is, since the return roller 21 and 21 'are provided separately on the left and right sides, for example, in FIG. 6, when the belt 13 moves in the direction of the arrow V, the right return roller 21 is closer to the left return roller 21' than the left return roller 21 '. Since the contact area with the right side retan roller 21 side is larger than that on the left side retan roller 21 'side, a larger force in the belt traveling direction acts, and the force causes the belt right side edge 13a to move.
The swivel frame 15 can be swung in the direction of the arrow H before the contact with the side rollers 34a and 34b. Therefore, by dividing the rollers 21 and 21 'into right and left, the turning performance of the turning frame 15 can be enhanced and the followability of the turning frame 15 to the left and right deviation of the belt 13 can be improved.

When the belt self-centering device is applied to the carrier side, the carrier roller is located in place of the return roller, but in this case, except that the mounting angles of the return roller and the carrier roller are different, The device 11 has the same configuration as that of the device 11 described above, and even if the device 11 is applied to the carrier side, the same effect as that of the device 11 applied to the return side can be obtained. When applied to the carrier side, for example, a three-divided carrier roller having inclined carrier rollers (belt support rollers) inclined inwardly on both sides of a horizontal carrier roller is supported on a revolving frame, and side carriers are provided on both sides of the inclined carrier roller. A roller mounting member (upright roller mounting member) is provided, and a pair of side rollers (upright rollers) are arranged so as to be orthogonal to the rotation axis of the inclined carrier roller in the front and rear of the belt with respect to the center of rotation of the mounting member. The pair of left and right side rollers are supported so as to be opposed to both side edges of the belt, which are supported on the carrier rollers and travel on the carrier rollers.

[0043]

As described above, according to the present invention, it is possible to realize a belt automatic centering device that can be applied to a belt conveyor that can be driven in the normal and reverse directions.

Further, the same self-centering effect can be obtained for the forward and reverse running of the belt.

Further, by dividing the belt supporting roller into the right and left, it is possible to enhance the slewing property of the slewing frame and improve the followability of the slewing frame to the left and right deviation of the belt.

[Brief description of drawings]

1A is a front view of a belt automatic centering device according to the present invention, and FIG. 1B is a side view of the same device.

FIG. 2 is a side view of the belt conveyor in the case where the same apparatus is applied to the retan side of the belt conveyor.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is a side view of a side roller portion of the same apparatus.

FIG. 5 is a schematic plan view of the same apparatus when the belt is running normally.

FIG. 6 is a schematic plan view of the same device when the belt meanders.

FIG. 7 is a schematic plan view of the same device when the belt meanders.

FIG. 8 is a schematic plan view of the above-mentioned device when the belt is meandering.

FIG. 9 is a schematic plan view of the same device when the belt meanders.

FIG. 10A is a front view of a conventional belt automatic centering device, and FIG. 10B is a side view of the same conventional device.

FIG. 11 is a side view of the belt conveyor when the conventional device is applied to the retan side of the belt conveyor.

[Explanation of symbols]

13 Conveyor belt 13a right edge 13b left edge 15 Horizontal swivel frame 21, 21 'Return Roller 23, 23 'horizontal axis of rotation 34a, 34b Side rollers 34a ', 34b' Side rollers L1 roller mounting center line L2 Side roller mounting center line O Traveling direction center line P1 turning axis P2, P2 Side roller rotating shaft P2 ', P2' Side roller rotating shaft Q, Q'swivel axis

Claims (5)

[Claims] 1. A belt supporting roller having a center of a horizontal swing frame supported by a swing shaft on a machine frame, and a left and right rotating shaft capable of being orthogonal to a traveling direction of a conveyor belt. Then, standing roller mounting members are pivotally supported on both ends of the swivel frame so as to swivel toward and away from the conveyor belt with the center of the swivel center as the swivel center. A pair of upright rollers are pivotally supported on the front side and the rear side in the traveling direction, and the pair of left and right upright rollers can be opposed to both side edges of the belt traveling on the belt support roller. A belt self-centering device that is characterized. 2. The belt self-centering according to claim 1, wherein a straight line connecting front and rear rotation shafts of the pair of upright rollers to each other is parallel to a traveling direction of the belt. apparatus. 3. The rotation center of the upright roller mounting member is an intersection of a straight line connecting the upright rotation axis of the upright roller in the front-rear direction and a straight line along the left-right rotation axis. The belt automatic centering device according to claim 1. 4. The belt according to claim 1, wherein each of the standing rotation shafts of the pair of standing rollers is located at an equal distance from the center of rotation of the standing roller mounting member. Automatic alignment device. 5. The belt self-centering device according to claim 1, wherein the belt supporting roller is divided into right and left parts.