JP2003300609A - Carrier roller device in belt conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and certainly align centers even though a belt meanders to either left or right, and besides, to prevent wear of a guide roller and occurrence of damage to the left and right ends of the belt. <P>SOLUTION: Left and right guide rollers Gf, Gr have larger inclination than that (legend L-L in figure) of left and right carrier rollers CRf, CRr, and arranged through arms 3f, 3r at prescribed spaces H from the left and right carrier rollers CRf, CRr at smaller inclination θ2 than a vertical condition (legend B-B in figure) to the left and right carrier rollers CRf, CRr. The belt V is arranged on the carrier rollers CRf, CRr, and also the back surfaces on the sides of both the left and right ends Vf, Vr of the belt V are arranged to be placed over the left and right guide rollers Gf, Gr. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier roller device for a belt conveyor that conveys earth and sand, ore and the like.

[0002]

2. Description of the Related Art Conventionally, as a carrier roller device of a belt conveyor having a centering function for preventing meandering of a belt of a belt conveyor for transporting earth and sand, ore, etc., a taper roller type carrier roller device shown in FIG. A guide roller type carrier roller device is mainly used in FIG. In the taper roller type carrier roller device shown in FIG. 14, when the carrier roller CRt has a taper, the both ends of the belt are thin and the central part is thick, and when the belt meanders,
Friction force is generated due to the difference in rotation distance between the rollers, and the belt is pulled back to the side opposite to the meandering to correct the meandering.

Further, in the guide roller type carrier roller device shown in FIG. 15, the guide rollers Gf and Gr are arranged substantially perpendicular to the left and right inclined carrier rollers CRf and CRr, and when the belt V meanders, the guide rollers Gf and Gr are guided. Laura G
The meandering is corrected so that f and Gr push the belt V in the opposite direction. Further, as shown in FIG. 16, as one of the guide roller type carrier roller devices, the left and right guide rollers Gf, Gr are supported via the arm 3 to the frame F which rotatably supports the left and right carrier rollers CRf, CRr. Some can be attached. In this type as well, the guide rollers Gf and Gr have the left and right inclined carrier rollers CRf and Grf.
It is arranged almost perpendicular to CRr. The symbol K is a restriction member that restricts the excessive rotation.

[0004]

However, in the above-mentioned taper roller type carrier roller device, the turning force is changed due to the frictional resistance between the roller and the belt, which is not reliable. In the guide roller type carrier roller device, the left and right ends of the belt are in sliding contact with the guide rollers Gf and Gr, so that the guide rollers Gf and Gr are worn and the left and right ends of the belt V are damaged. .

Therefore, an object of the present invention is to make it possible to correct the meandering immediately after the meandering even if the belt meanders to the left or right, and to wear the guide rollers or the left and right ends of the belt. It is an object of the present invention to provide a carrier roller device for a belt conveyor which does not cause damage to the belt conveyor.

[0006]

According to a first aspect of the present invention, there is provided a carrier roller device for a belt conveyor, which comprises a frame rotatably supported on a pedestal arranged perpendicular to the traveling direction of the belt and a frame. It is provided with left and right carrier rollers rotatably supported and left and right guide rollers attached to the frame via arms, and the left and right guide rollers are located on the downstream side of the belt with respect to the positions of the left and right carrier rollers. They are arranged at a predetermined interval, and are arranged at a predetermined interval from the left and right carrier rollers at a predetermined interval with an inclination angle larger than the left and right carrier rollers and smaller than the vertical state with respect to the left and right carrier rollers. The belt is arranged on each carrier roller, and the back surfaces on the left and right ends thereof are arranged so as to span the left and right guide rollers. And wherein the door.

According to this invention, the left and right back sides of the belt are normally hung on the left and right guide rollers to keep the balance, but when the belt meanders, the belt is hung on the left and right end sides of the belt. A change occurs in the area over which the left and right guide rollers are arranged (balance is lost). The most important situation in which this balance is lost is that the belt meanders so that the belt is disengaged from one of the left and right guide rollers that are arranged so that the left and right ends of the belt are suspended, and the belt is suspended only on the other side. Is. When there is a change in the area stretched over the left and right guide rollers in this way, the force of pressing the belt acts only on one of the guide rollers, and the force of pressing the belt acts on the other guide roller. When one of the left and right guide rollers is dislodged from one of the left and right guide rollers and the belt is stretched only on the other side, the force of pressing the belt acts only on the one guide roller on which the belt is stretched, and the belt is applied to the other guide roller. The pressing force of is no longer generated. When the pressing force of the belt is applied to only one guide roller (including the case where the pressing force is larger than the other), the pressing force acts as the force to rotate one carrier roller connected by the arm. , The frame that is supported on the pedestal will be rotated to correct the meandering.

According to a second aspect of the present invention, there is provided a carrier roller device for a belt conveyor, wherein each frame is rotatably supported by a frame mounted on a pedestal that is arranged perpendicularly to the belt traveling direction. A central carrier roller rotatably supported on the left and right, and left and right carrier rollers disposed on the left and right of the central carrier roller; And a left and right guide rollers that are attached to the left and right frames that support the left and right carrier rollers in a rollable manner via arms, respectively. The belts are arranged on the downstream side of the belt at a predetermined distance from each other, and have a larger inclination angle than the left and right carrier rollers and the left and right carrier rollers. The belt is arranged on each carrier roller at a predetermined interval from the left and right carrier rollers at an inclination angle smaller than that in the vertical state, and the back surfaces on both left and right sides of the belt serve as left and right guide rollers. It is characterized by being arranged so as to hang.

According to the present invention, the left and right back sides of the belt are normally hung on the left and right guide rollers to maintain balance, but when the belt meanders, the belt is hung on the left and right end sides of the belt. A change occurs in the area over which the left and right guide rollers are arranged (balance is lost). The most important situation in which this balance is lost is that the belt meanders so that the belt is disengaged from one of the left and right guide rollers that are arranged so that the left and right ends of the belt are suspended, and the belt is suspended only on the other side. Is. When there is a change in the area stretched over the left and right guide rollers in this way, the force of pressing the belt acts only on one of the guide rollers on which the belt runs, and the force of pressing the belt acts on the other guide roller is small. When the balance is lost and one of the left and right guide rollers is disengaged and the belt is stretched only on the other side, the pressing force acts only on the one guide roller on which the belt is stretched, and the other guide roller receives the belt force. No pressing force is generated. When the pressing force of the belt is applied to only one guide roller (including the case where the pressing force is larger than the other), the pressing force acts as a force to rotate one carrier roller connected by the arm, Since the link mechanism is provided, the central carrier roller and the other carrier roller also rotate in the same direction about their respective axes. In this way, when one of the carrier rollers rotates by a predetermined angle, the link mechanism causes the other carrier roller to rotate by the same angle in that direction.

[0010]

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

(First Embodiment) As shown in FIGS. 1 and 2A and 2B, the present embodiment is a carrier roller device of a belt conveyor for carrying earth and sand, ore, and the like.
As shown in FIG. 4, a carrier roller device D having no centering function is arranged at an interval in the traveling direction Vs of the belt, and between the carrier roller devices D and D having no such centering function. Further, the carrier roller device 1 of the belt conveyor according to the present embodiment is arranged in a direction orthogonal to the traveling direction Vs of the belt.

Carrier roller device 1 for belt conveyor
Is a belt V as shown in FIGS. 1 and 3A and 3B.
Performs right and left side alignment. The carrier roller device 1 of the belt conveyor, which performs right-sided centering and left-side centering,
A frame 2 arranged orthogonal to the traveling direction Vs of the belt V,
A horizontal center carrier roller CRc that is rotatably supported on the gantry 2, left and right carrier rollers CRf and CRr that are symmetrically inclined to the left and right, and left and right carrier rollers CRf and CRr are rolled. Left and right guide rollers Gf and Gr are attached to left and right frames Ff and Fr, which are movably supported, via arms 3f and 3r, respectively. The belt V is disposed on the center carrier roller CRc, the left and right carrier rollers CRf, CRr, and the left and right guide rollers Gf, Gr, and the left and right ends Vf, Vf of the belt V are
The rear surface on the Vr side is arranged so as to span the left and right guide rollers Gf and Gr.

The center carrier roller CRc and the left and right carrier rollers CRf, CRr are rotatably attached to the frame 2 via the frames Fc, Ff, Fr. Each of the frames Fc, Ff, Fr has a U-shaped cross section, and the carrier rollers CRc, CRf, CRr roll to the left and right (longitudinal front and rear) in concave grooves formed on the left and right (front and rear in the longitudinal direction) thereof. The shaft is supported. The center carrier roller CRc has a center frame Fc supported by a shaft J1 arranged in the center of the frame 2 so as to be horizontally rotatable. The left and right carrier rollers CRf and CRr are
These left and right frames Ff and Fr are arranged on the left and right of the gantry 2 and bearings 4f and 4r, and left and right bearings 4 respectively.
An L-shaped auxiliary member 6 is connected to the shafts Jf and Jr that rotate by f and 4r, and the left and right corners C1 of the left and right frames Ff and Fr, which have a left and right U-shaped cross section and are inclined with respect to the auxiliary member 6. Are welded. In the present embodiment, the central frame Fc is horizontally rotatably supported by the shaft J1 arranged in the center of the gantry 2, but the left and right frames Ff,
The bearings (4f, 4r) may be interposed like Fr. The type of the bearings (4f, 4r) is not limited, but so-called ball bearings, oilless bearings (oil-impregnated bearings) and the like can be used.

The left and right guide rollers Gf, Gr have a larger inclination angle than the left and right carrier rollers CRf, CRr (reference numeral LL in the figure) and are in a vertical state with respect to the left and right carrier rollers CRf, CRr. (Reference B in the figure
-The arm 3f, which is positioned outside the left and right carrier rollers CRf, CRr at an inclination angle θ2 smaller than
It is arranged by 3r (FIG. 2 (a)). In the present embodiment, the left and right carrier rollers CRf, CRr have an inclination angle of 30 degrees, that is, the trough angle is 30 degrees, and the left and right guide rollers Gf, Gr have an inclination angle of about 20 degrees, that is, the left and right carrier rollers CRf. , CRr from the inclination angle (reference numeral L-L in the figure) of about 20 degrees. It should be noted that the left and right ends Vf and Vr of the belt V are not loaded with a load such as gravel on the back surface thereof. Further, the left and right guide rollers Gf, Gr are arranged at a predetermined interval H on the downstream side Va of the belt V with respect to the positions of the left and right carrier rollers CRf, C (FIG. 3A). Belt V
The downstream side Va of the belt V is the start point side of the traveling direction Vs of the belt V, and the upstream side Vb described later is the traveling direction V of the belt V.
say the end point side of s. Therefore, the left and right guide rollers Gf, Gr are initially arranged so that the back surfaces of the left and right ends Vf, Vr of the belt V are hung, but when the belt V meanders, one of the left and right ends Vf, Vr is Either it is disengaged or the left and right ends Vf and Vr of the belt V are changed in a region where the left and right guide rollers Gf and Gr are bridged (see FIG. 2).
(See (b)). When the left and right guide rollers Gf, Gr lose their balance due to the meandering of the belt V, a force pressing only one of the left and right guide rollers Gf, Gr acts, and the carrier roller CR on the one side.
The f and CRr are moved via the frames Ff and Fr.
In other words, the left and right guide rollers Gf, Gr located on the downstream side Va with respect to the position of the gantry 2 are configured to give a force for rotating the left and right carrier rollers CRf, CRr from the direction of the downstream side Va. There is. Here, the larger the predetermined spacing H is, the more the guide rollers G are provided.
The forces f and Gr rotate the left and right carrier rollers CRf and CRr. Also, the left and right guide rollers G
Although f and Gr are arranged such that the outer end surfaces E2 thereof are outside the outer end surfaces E1 of the left and right carrier rollers CRf and CRr (FIG. 2B), the left and right end sides Vf and Vr of the belt V are arranged. If the left and right guide rollers Gf, Gr are arranged so as to be received at the inclination angle as described above, the left and right guide rollers Gf, Gr are necessarily arranged outside the left and right carrier rollers CRf, CRr. It does not have to be installed. The arms 3f and 3r are provided on the left and right frames F.
f and Fr are connected to the left and right guide rollers Gf and Gr, and bearings 3fj and 3rj that rotatably receive the rotation shafts are provided on the left and right guide rollers Gf and Gr sides. On the other hand, the left and right frames Ff, Fr and the arms 3f, 3r may be connected by welding,
For example, as shown in FIG. 9, left and right frames Ff, Fr
The predetermined distance H from the left and right frames Ff, Fr may be adjustable by screwing the screw holes formed in the and the long holes 3rh, 3rh provided in the arms 3f, 3r.

The central frame Fc and the left and right frames Ff,
The link mechanism 5 operates in parallel with Fr in the left and right directions.
Such a link mechanism 5 is also called a parallel link mechanism and is configured as follows. That is, a first connecting member 5c, one end of which is connected to the central frame Fc and the other end of which is rotatably connected, and a shaft 8c which rotatably supports the other end of the first connecting member 5c. And a fourth connecting member 5a connected to each other. In addition, the second and third connecting members 5 each having one end connected to the left and right frames Ff and Fr and the other end rotatably connected to each other.
f and 5r are connected to the fourth connecting member 5a via shafts 8f and 8r that rotatably support the other ends of the second and third connecting members 5f and 5r, respectively. Here, the one end side of the first, second and third connecting members 5c, 5f, 5r is not the frame Fc, Ff, Fr but the frame F
It may be connected to axes Jc, Jf, and Jr that rotate c, Ff, and Fr. A screw member is used for the shafts 8f, 8r, 8c, but the present invention is not limited to this.

Therefore, when the present embodiment is actually used, the belt V is connected to the carrier rollers CRc, CR.
Left and right guide rollers G on the f and CRr
It is arranged so that the back surfaces on the left and right ends Vf and Vr of the belt V hang on f and Gr. When the belt V is driven by a drive motor, any of the carrier rollers CRc, CRf, CRr are not supported by the pedestal 2 during normal progress in which the belt V does not meander.
At the top, it is directed toward the front and sent with a load, and neither tilts, that is, rotates horizontally. That is,
The areas of the left and right ends Vf and Vr of the belt V, which extend over the left and right guide rollers Gf and Gr, are almost the same, and the process proceeds normally (FIG. 2A). 7 (a) (b) (c)
Is an ear portion of the belt V (the left and right ends Vf and Vr are “ear portions”)
FIG. 7 is a diagram showing an additional tension distribution (also referred to as
As shown in (a), when the belt V does not meander normally, the area where the ears of the belt V span the left and right guide rollers Gf and Gr is the same, and the left and right guide rollers Gf and G are the same.
The tension applied to r (the pressing force of the belt V) is the same. In FIG. 7A, the left and right guide rollers G of the belt V
The distribution of the pressing force against f and Gr is shown by diagonal lines B1f and B1.
r, the carrier rollers CRf, C on the left and right of the belt V.
The distribution of the pressing force with respect to Rr is shown by the diagonal line B2.

However, when the belt V meanders to the left (explained in the case where leftward meandering occurs as shown in FIG. 4), a change occurs in the area where the belt V extends over the left and right guide rollers Gf and Gr (balance). Lost). Figure 2 shows the situation in which this balance is lost.
As shown in (b), the right end Vr of the belt V is disengaged from the right guide roller Gr, and the belt V spans only the left guide roller Gf. Firstly, from this state, as shown in FIG. 4, when the belt V meanders, the belt V is disengaged from one guide roller Gr and is hung only on the other guide roller Gf. Gr does not rotate, and the left end Vs of the belt V presses only the left guide roller Gf (the pressing force works). Here, the left guide roller Gf
Also rotates (rotates in the traveling direction Vs of the belt V), but its rotation resistance is small. In addition, in FIG. 4, a load such as gravel is applied to the starting point pulley P1 side, and the direction of the traveling direction Vs of the belt V,
That is, it is a diagram in which the belt is conveyed toward the end pulley (not shown, but the upper side in FIG. 4), and is an example in which a belt meandering to the left in the traveling direction Vs of the belt V is corrected (aligned) to the right. The starting point pulley P1 side is the downstream side Va, and the upper side in FIG. 4 where the terminal pulley is arranged is the upstream side Vb. Only the left guide roller Gf is pressed by the belt V, and the left carrier roller CRf on the same side, which is connected to the guide roller Gf by the arm 3f, is horizontally rotated via the shaft Jf (FIG. 3 (a)). . This is because the pressing force of the belt V against the guide roller Gf on the left side of the downstream side Va from the position of the gantry 2 rotates the carrier roller CRf from the downstream side Va via the arm 3f (horizontal rotation).
This is because it works as a force to make them. Since the link mechanism 5 is provided, the horizontal center carrier roller C
Rc and the right carrier roller CRr also have their respective axes Jc, J.
Rotate horizontally in the same direction around r (Fig. 3).
(B)). That is, the first, second and third connecting members 5c, 5f, 5r, one end of which is connected to the outer periphery of the shafts Jc, Jf, Jr and the other end of which are rotatably connected, respectively, and the first and second By the link mechanism 5 including the fourth connecting member 5a that connects the other end sides of the third connecting members 5c, 5f, 5r (one end of the first, second and third connecting members 5c, 5f, 5r When the carrier roller CRf on the left side is horizontally rotated at a predetermined angle θ1 (with the side as a fulcrum), the center carrier roller C is rotated by the same angle as the rotation angle θ1 by the link mechanism 5.
Rc and the carrier roller CRr on the right side are also horizontally rotated (FIG. 3B). Next, due to the meandering, the right end Vr of the belt V is not completely disengaged from the right guide roller Gr, and the balance between the right and left ends Vf, Vr of the belt V with respect to the left and right guide rollers Gf, Gr is lost. Also (even if the left-right balance is lost), the left-right guide rollers Gf, Gr cause a difference in the turning force with respect to the left-right carrier rollers CRf, CRr via the arms 3f, 3r, and the horizontal turning is performed. Become. That is, when the belt V meanders to the left (see FIG. 4), the state immediately after the meandering is the guide rollers G on the left and right of the belt V.
A change occurs in the area over f and Gr (the left-right balance is lost). If this balance is lost, Fig. 7
As shown in (b), in order to cause a difference in the applied tension (the pressing force of the belt V) to the left and right guide rollers Gf and Gr of the ears of the belt V (to the left and right guide rollers Gf and Gr of the belt V). Regarding the distribution of the pressing force, the left side (oblique line B1f) becomes large and the right side (oblique line B1r) becomes small), and horizontal swirling occurs in the direction of correcting the meandering immediately after the meandering. Then, the greater the meandering (see FIG. 7C), the greater the difference in the applied tension (the pressing force of the belt V) to the left and right guide rollers Gf and Gr of the ears of the belt V.
It causes a large horizontal rotation to correct the meandering. Note that in FIG. 7C, the ears of the belt V have left and right guide rollers G.
FIG. 6 is a diagram showing a distribution of additional tension (pressing force of the belt V) to the left and right guide rollers Gf and Gr of the belt V that is separated from one of f and Gr and hung only on the other.

As described above, according to the present embodiment, when the belt V meanders, the meandering correction operation is started immediately after the meandering. That is, if the right end Vr of the belt V is not completely disengaged from the right guide roller Gr by the meandering, and the balance of the left and right ends Vf, Vr of the belt V with respect to the left and right guide rollers Gf, Gr is lost, The left and right guide rollers Gf and Gr are connected to the arms 3f and 3r.
This is because the pressing force from the downstream side Va with respect to the left and right carrier rollers CRf and CRr is caused to differ by the horizontal rotation. The greater the meandering, the more the belt V is completely disengaged from one of the left and right guide rollers Gf and Gr. Therefore, the difference in the pressing force from the downstream side Va increases, and the meandering correction is performed. The horizontal turning distance of is large. Here, what is important in automatic centering is that, when a meander occurs, the carrier roller device of the belt conveyor arranged at that position performs centering in a direction opposite to the meandering direction. That is, the subsequent meandering correction is a problem for the next carrier roller device. In this respect, according to the present embodiment, the turning operation for correcting the meandering is started immediately after the meandering of the belt V occurs (see FIG. 7).
(See (b)), as compared with the conventional device as shown in FIGS. 14 to 16, it is possible to surely correct the meandering earlier.

Further, in the present embodiment, the left and right guide rollers Gf, Gr are the left and right carrier rollers CRf, C.
The inclination angle θ2 is larger than Rr (reference numeral LL in FIG. 2A) and smaller than the vertical state (reference numeral BB in FIG. 2A) with respect to the left and right carrier rollers CRf and CRr. Since the back surface of the belt V is in sliding contact with the guide rollers Gf and Gr, the left and right ends Vf and Vr of the belt V are not damaged as in the conventional case.
In addition, in the present embodiment, a regulating member K that regulates excessive rotation, such as the total swirling method, may be provided (see FIG. 1).
The reference numeral K in 6) does not have to be provided. This is because the link mechanism 5 naturally causes a braking action.

(Application Example of First Embodiment) As an application example of the first embodiment, as shown in FIG. 6, left and right carrier rollers CRf and CRr and a center carrier roller C are provided.
It may be arranged such that the position of Rc is shifted.
That is, the central carrier roller CRc is disposed at
The positions are arranged on the downstream side Va of the belt V with respect to the positions of the left and right carrier rollers CRf and CRr. Therefore, the second connecting member 5c, one end of which is connected to the central frame Fc and the other end of which is connected to the center of the fourth connecting member 5a, is longer than the lengths of the first and second connecting members 5f and 5r. A long one is used and an elongated hole 10 is formed so that the shaft 8c on the other end side of the second connecting member 5c can rotate. In the present embodiment, the center carrier roller CR
Since the position of c is offset from the positions of the left and right carrier rollers CRf and CRr, the roller length H2 of the center carrier roller CRc is lengthened in response to a heavy load or high tension. be able to.

Here, the left and right guide rollers Gf, Gr of this embodiment have a predetermined distance H on the downstream side Va of the belt V with respect to the positions of the left and right carrier rollers CRf, CRr via the arms 3f, 3r. It is provided and arranged (Fig. 3
(A), FIG. 6). This is because when the left and right guide rollers Gf and Gr are arranged on the upstream side Vb of the belt V with respect to the positions of the left and right carrier rollers CRf and CRr, as shown in FIG. When a meander occurs on the left side toward the left side (the left and right ends Vf and Vr of the belt V are shown by two-dot chain lines in the figure), a force for pressing only the left guide roller Gf works, and the other guide roller Gr presses the belt V. This is because the force is no longer generated and the left carrier roller CRf is swung in the direction of the arrow in the figure, but this turning direction is a direction that further increases the meandering (see the arrow in FIG. 8B). On the other hand, when meandering occurs on the same left side, the left and right guide rollers G as in the present embodiment.
If f and Gr are arranged on the downstream side Va of the positions of the left and right carrier rollers CRf and CRr, as shown in FIG. 4, a force is exerted only on the left guide roller CRf, which acts on the left carrier roller CRf. It turns in the direction of the arrow in the figure, but this turning direction is the direction for correcting the meandering.
Therefore, the left and right guide rollers Gf and Gr are arranged on the downstream side Va of the belt V with respect to the positions of the left and right carrier rollers CRf and CRr.

(Second Embodiment) In this embodiment, as shown in FIGS. 10 to 13, a center carrier roller CRc and left and right carrier rollers CRf, CRr are rotatably supported on a pedestal. One frame F is arranged, a shaft J is provided at the center of the frame F, and a center carrier roller CRc and left and right carrier rollers CRf, CR centering on the shaft J are provided.
The present invention is applied to a system in which the frame F is horizontally rotated so that r is symmetrically oriented (hereinafter referred to as "whole rotation system"), and does not have the link mechanism as in the first embodiment. Carrier roller devices 21A, 21
B, 31A and 31B. 10 (a) (b) and FIG.
1 (a) and (b) are taper roller type, and FIG.
(B) shows three carrier rollers CRc, CRf, CRr
11A and 11B show carrier roller devices 21A and 21B of a belt conveyor having only left and right carrier rollers CRf and CRr. 12 (a) (b)
13 (a) and 13 (b) show a method without taper, and FIGS. 12 (a) and 12 (b) show three carrier rollers CRc, CR.
FIGS. 13A and 13B show carrier roller devices 31A and 31B of a belt conveyor having only left and right carrier rollers CRf and CRr, respectively. And
The left and right guide rollers Gf, Gr are arranged at a predetermined interval H on the downstream side Va of the belt V with respect to the positions of the left and right carrier rollers CRf, CRr, as in the first embodiment (FIG. 10 (a), FIG. 11 (a), etc.). Also,
The left and right carrier rollers CRf, CRr have a tilt angle θ2 larger than the tilted state (reference symbol LL in the figure) and smaller than the vertical state (reference symbol BB in the figure) with respect to the left and right carrier rollers CRf, CRr. The points (FIG. 10 (b), FIG. 11 (b), etc.) that are disposed outside the left and right carrier rollers CRf, CRr at an angle θ2 are the same as in the first embodiment. Even when the reference sign L-L in the figure is horizontal, it can be applied at the inclination angle θ2.

According to the present embodiment, as in the first embodiment, when the belt V meanders, the left and right guide rollers are arranged so that the back surfaces of the belt V on the left and right ends Vf and Vr are suspended. One of the Gf and Gr is disengaged from the other, and the area over which the belt V is stretched becomes large on the other side, or the left and right balance is lost in the area over which the belt V is stretched, so that only one guide roller Gf is rotated and pressed. When,
The pressing force of only one acts as a force for rotating one carrier roller CRf via the arm 3f, and rotates the frame F about its axis J. That is, the other carrier roller CRr is rotated symmetrically with the one carrier roller CRf to correct the meandering. As described above, in the method of rotating the carrier rollers CRc, CRf, CRr by utilizing the left and right guide rollers Gf, Gr of the present invention, the meandering is promptly corrected immediately after the meandering occurs. It is widely applicable to those that are rotatably supported.

Next, the first embodiment and the second embodiment will be compared and described. As the second embodiment,
Three carrier rollers CR shown in FIGS. 11 (a) and 11 (b)
The description will be made assuming that it has c, CRf, and CRr. In the first embodiment, the carrier rollers CRc, CRf, CRr horizontally swivel in the range of the predetermined turning angle θ1, but as compared with the second embodiment shown in FIG. 5B, the angle is θ3. , And the predetermined angle θ1 in the first embodiment is
The angle is smaller than the predetermined angle θ3 of the second embodiment, so that the belt V can be tilted in a direction opposite to the meandering direction with a small turning distance (FIG. 5A).

As described above, in each of the embodiments, the number of the left and right carrier rollers CRf and CRr arranged at each position does not matter, and for example, two left and right carrier rollers C are provided.
The present invention is also applicable to the case where Rf and CRr are arranged. Moreover, in each of the embodiments, the left and right carrier rollers CRf and CRr are symmetrically arranged one by one, but the present invention has been described.
CRr can be applied without being inclined, that is, in a horizontal state.

[0026]

According to the carrier roller device for a belt conveyor of claim 1 of the present invention, the left and right guide rollers attached to the frame via the arms are located on the downstream side of the belt with respect to the positions of the left and right carrier rollers. The belts are arranged at a predetermined interval and are arranged at a predetermined angle to the left and right carrier rollers at a predetermined interval from the left and right carrier rollers through an arm, which is opposite to the meandering direction of the belt. Since the back surface on the left and right end sides of the belt is in sliding contact with the guide roller, it is possible to prevent the guide roller and the left and right end portions of the belt from being worn.

According to the carrier roller device of the belt conveyor of the second aspect of the present invention, the horizontal center carrier roller and the left and right carrier rollers are each rotatable on the mount via each shaft, and each of them is rotatable. Since the carrier roller of is rotated in the same direction and the same angle by the link mechanism,
It becomes possible to rotate the belt in the direction opposite to the meandering direction with a small rotation distance as compared with the carrier roller device of the total rotation type in which all the carrier rollers are inclined about the central axis as a whole. Since the rear surfaces on the left and right end sides of the belt are in sliding contact with the guide roller, it is possible to prevent the guide roller and the left and right end portions of the belt from being worn.

[0028]

[Brief description of drawings]

FIG. 1 is a perspective view showing a carrier roller device of a belt conveyor according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a state where the belt according to the first embodiment has meandered from a normal operation.

FIG. 3 is a plan view illustrating the operation of the first embodiment.

FIG. 4 is a plan view showing a belt conveyor provided with the device according to the first embodiment.

FIG. 5 is a plan view showing the operation of the first embodiment in comparison with the operation of the conventional apparatus.

FIG. 6 is a plan view of an application example of the first embodiment.

FIG. 7 is a diagram for explaining the distribution of the pressing force of the belt against the roller in the first embodiment.

FIG. 8 is a plan view illustrating a meandering state in the first embodiment.

FIG. 9 is a diagram showing a connection between a guide roller and a carrier roller in the first embodiment.

FIG. 10 is a front view showing a carrier roller device for a belt conveyor according to a second embodiment of the present invention.

FIG. 11 is a front view showing another example of the second embodiment.

FIG. 12 is a front view showing another example of the second embodiment.

FIG. 13 is a front view showing another example of the second embodiment.

FIG. 14 is a front view of a carrier roller device of a conventional belt conveyor.

FIG. 15 is a front view of a carrier roller device of a conventional belt conveyor.

FIG. 16 is a front view and a plan view of a conventional carrier roller device for a belt conveyor.

[Explanation of symbols]

1, 11 Belt conveyor carrier roller device, 21A, 21B, 21A, 21B Belt conveyor carrier roller device, 2 mounts, 3f, 3r arms, 3fj, 3rj bearings 3fh, 3rh long hole 5 link mechanism, 5a Fourth connection Member, 5c Second connecting member (center connecting member), 5f First connecting member, 5r Third connecting member, 6 Auxiliary member, CRc Central carrier roller, CRf, CRr Left and right carrier rollers, Fc, Ff , Fr frame, Gf, Gr left and right guide rollers, H predetermined interval (distance between guide roller and carrier roller), V belt, Vf, Vr right and left ends of belt, Vs belt traveling direction, Va downstream side, V
b Upstream side, θ1 Rotation angle of each carrier roller, θ2 Inclination angle of the left and right guide rollers, θ3 Rotation angle of the whole rotation method, Z Transported object (load) such as gravel

Claims (2)

[Claims] 1. A frame rotatably supported on a pedestal arranged perpendicularly to the traveling direction of a belt, left and right carrier rollers rotatably supported by the frame, and frames via arms, respectively. It is equipped with left and right guide rollers that are attached.The left and right guide rollers are arranged at a predetermined distance downstream of the position of the left and right carrier rollers and at a larger inclination angle than the left and right carrier rollers. ,
Further, the belts are arranged at predetermined intervals from the left and right carrier rollers via an arm at an inclination angle smaller than the vertical state with respect to the left and right carrier rollers. A carrier roller device for a belt conveyor, wherein the carrier roller device is arranged so as to span the left and right guide rollers. 2. A central carrier roller, which is rotatably supported by each frame via a frame and rotatably supported by each frame, on a frame arranged perpendicular to the traveling direction of the belt. The left and right carrier rollers, the link mechanism in which one end side is respectively connected to each shaft or each frame that rotatably supports these shafts, and the other end side operates in parallel to the left and right, and the left and right carrier rollers are rotated. The left and right guide rollers are mounted to the left and right frames that are movably supported by arms, and the left and right guide rollers are arranged at a predetermined interval downstream of the positions of the left and right carrier rollers. At the same time, with a larger tilt angle than the left and right carrier rollers,
Further, the belts are arranged at predetermined intervals from the left and right carrier rollers via an arm at an inclination angle smaller than the vertical state with respect to the left and right carrier rollers. A carrier roller device for a belt conveyor, wherein the carrier roller device is arranged so as to span the left and right guide rollers.