JP2000302220A - Belt supporting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To support a belt in curved state so that the curvature of the belt can be changed. SOLUTION: With this supporting structure, a fixed frame 20a for rotatably supporting a roller 10 is arranged in the center across the width of a belt 2 of a belt conveyor, first turning frames 21 for rotatably supporting rollers 11, 11 are connected to both sides of the fixed frame through turning shafts 31, and second turning frames 22 for rotatably supporting rollers 12, 12 are connected to the sides of the first turning frames through turning shafts 32. Further, the tilt angle of the first turning frames 21 is adapted to be adjustable in relation to the frame 20 by first adjusting bodies 21g, 21i, and the tilt angle of the second turning frames 22 is adapted to be adjustable in relation to the first turning frame 21 by means of second adjusting bodies 22c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt support structure for a belt conveyor, and more particularly to a belt support structure capable of supporting a belt in a curved state with rollers and changing the curvature thereof.

[0002]

2. Description of the Related Art Rollerless conveyors have been put to practical use in which a belt is placed on a curved trough and air is ejected from an air hole provided at the lowermost portion of the trough to lift the belt slightly and run the belt. ing. In general, pulleys are used in the folded portion of such a rollerless conveyor, but at the entrance of the pulley,
The belt runs flat. Therefore, in the process of placing the belt on the trough from the pulley portion, it is necessary to gradually change the belt shape from a flat surface to a curved surface. At this time,
If the curvature change of the belt cross section is not appropriate, interference between the trough end and the belt or interference between both edges of the belt and the curved surface of the trough may increase frictional resistance and hinder belt running. There are cases. Conventionally, several belt support structures having different curvatures of the belt support surface formed by the rotation axes of the three rollers are installed in such a curvature changing section of the belt cross section, and the curvature of the belt cross section is gradually reduced. Is changing.

[0003]

However, in the above-mentioned belt support structure of a fixed curvature type, if the curvature of the curved surface of the trough is different, it is necessary to manufacture the belt support structure each time. There was a problem that it took time. Even if the curvature is manufactured as designed, even if it is actually combined with a trough, belt interference will occur, and fine adjustments are often made by inserting spacers into the gantry, which takes time to install. There was also a problem.

The present invention has been made in order to solve such a problem, and it is possible to change a tilt angle of a rotation axis of a plurality of rollers for supporting a belt and to provide a plurality of troughs having different curvatures on a curved surface. It is an object of the present invention to provide a belt support structure that can cope with the problem and can reduce the adjustment time when installing the conveyor.

[0005]

According to the first aspect of the present invention,
A belt support structure comprising: a plurality of rollers in which rotation axes are arranged in a width direction of a belt of a belt conveyor; and a plurality of pedestals for rotatably supporting the rollers, wherein the rollers support the lower surface of the belt in a curved state. In the body, the gantry of each of the rollers adjacent to each other in the width direction of the belt is rotatably connected to each other about a rotation axis in a running direction of the belt.

According to this structure, the gantry supporting the rollers can be rotated around the rotation axis in the belt running direction to change the inclination angles of the gantry and the rollers, so that a plurality of curved surfaces having different curvatures are provided. It can respond to troughs.

According to a second aspect of the present invention, in the belt support structure according to the first aspect, the plurality of pedestals are disposed below a central portion in the width direction of the belt and fixed to the pedestal body. And a plurality of rotating frames that are sequentially connected to both sides of the fixed frame and that can be fixed and rotated by an inclination adjusting mechanism.

[0008] According to this configuration, since each of the rotating frames can be rotated and fixed at an appropriate position, the curvature of the belt curved surface can be adjusted at the time of installation.

According to a third aspect of the present invention, in the belt support structure according to the second aspect, the plurality of rotating frames are a first rotating frame connected one by one to both sides of the fixed frame.
A second rotating gantry connected one by one to the outside of the first rotating gantry, wherein the inclination adjusting mechanism has an upper end fixed to the first rotating gantry and a lower end fixed to the first rotating gantry. A first adjustment body attached to the gantry body so as to be vertically adjustable; and a second adjustment body having one end fixed to the second rotating gantry and the other end attached to the first adjustment body so as to be vertically adjustable. And an adjusting body.

According to this structure, the movement for changing the inclination angle of both the first and second rotating frames is only the rotating motion about the respective rotating axes, so that the curvature adjustment is performed. Work becomes easier.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a belt support structure 1.
Is shown by a cross section in the width direction of the belt 2. The belt 2 runs in the direction perpendicular to the paper of FIG. In the present embodiment, the lower surface of the belt 2 is supported in a curved state by five rollers 10, 11, 11, 12, and 12 that are arranged in the width direction of the belt 2 and rotatably supported.

The roller 10 is rotatably supported by a fixed gantry 20a, the rollers 11 are rotatably supported by roller support portions 21a of the first rotating gantry 21, and the rollers 12 are , The second rotating frame 2
It is rotatably supported by 2.22 roller support portions 22a.

The fixed gantry 20a is fixed to a gantry body 20 mounted on the stringer 3 and supporting the entire belt support structure 1. The rotating shaft 31 is fixed to the fixed base 20a.

Since the belt support structure 1 has a symmetrical structure, the following description will be made on the left half. The configuration of the right half is the same, and the operation is possible independently of the left half.

The first rotating base 21 includes a roller supporting member 21.
a, a supporting frame 21b, an inner moving member 21c, an outer moving member 21d, and a connecting portion 21e, which are rigidly connected integrally. The roller support 21a is
Both ends of the roller 20 are rotatably supported. The support frame 21b has a U-shape to fix and hold the roller support portion 21a, and the fixed frame 2
0a. Inside moving member 21c
An elongated hole 21f is formed in the lower part of the first adjusting body 21g. The elongated hole 21f has an arc shape centered on the rotation shaft 31. A long hole 21h is formed in the lower part of the outer moving member 21d, and another first adjusting body 21
i. This elongated hole 21h is also connected to the rotating shaft 31.
In the form of an arc centered at. On the other hand, the outer moving member 21
An elongated hole 21j is formed on the upper part of the second adjusting body 22c.
Is composed. This elongated hole 21j is provided with a rotating shaft 3 described later.
It has an arc shape centered on 2.

FIG. 2 is a perspective view showing details around the first adjusting member 21i. As shown here, the outer moving member 21d of the gantry body 20 and the first rotating gantry 21
Each is formed by two plate-shaped members. The outer moving members 21d are sandwiched between the gantry bodies 20, 20,
Further, a cylindrical member 45 is sandwiched between the outer moving members 21d. Then, the gantry bodies 20 and 20, the outer moving members 21d and 21d, and the cylindrical member 45 are
Are penetrated, and a nut 44 is attached to the bolt 42.
In this manner, the outer moving members 21d and 21d and the gantry body 20.2.
“0” means that it is fixed and movable. The other first
The same configuration is applied to the adjustment body 21g. In the present embodiment, the outer moving member 21d of the gantry body 20 and the first rotating gantry 21 is both formed of two plate-shaped members. However, these are not limited to plate-like members.

The second rotating frame 22 includes a roller support 22a.
And a support frame 22b. The roller support portion 22a rotatably supports both ends of the roller 12. The support frame 22b is formed in an L-shape,
2a is fixedly held, and one end thereof is rotatably connected to a rotation shaft 32 fixed to the support frame 21b of the first rotation gantry 21. Also, at the other end of the support frame 22b,
A bolt 43 is inserted, and the bolt 43 is further
It is inserted into a long hole 21j formed on the upper part of the outer moving member 21d of the rotating gantry 21.
Is composed. Thus, the support frame 22b and the outer moving member 21d can be fixed and moved by tightening and loosening the bolt 43.

Next, the operation of installing the rollerless conveyor 51 using the belt support structure 1 having the above configuration will be described. FIG. 3 is a side view of the belt turning portion of the rollerless conveyor 51.

The rollerless conveyor 51 places the belt 2 on a curved trough 52, and blows air from the air holes 52a formed in a longitudinal row at the bottom of the trough 52 to slightly lift the belt 2. The belt 2 is caused to travel with reduced friction. A pulley 53 is disposed at the folded portion of the belt 2. At the entrance of the pulley 53, the belt 2 runs in the direction of arrow R in a planar state.

In order to make the belt 2 run smoothly,
In the process from the pulley 53 to the trough 52, the belt 2
Needs to be gradually changed from a planar shape to a curved shape. In the present embodiment, 3
Base belt support structure (from left in the figure) 1A ・ 1B
・ 1 is arranged. In FIG. 3, these three belt support structures 1A, 1B, 1
Are shown only with the respective rollers positioned at the center in the width direction. The hatched portion represents the back surface of the belt 2 that gradually curves from the pulley 53 toward the trough 52. FIG. 4 shows (a), (b), (c), (d)
AA line, BB line, and C in FIG.
It shows a cross section taken along line C-D and line D-D.

In this rollerless conveyor 51, a gantry-fixed type belt supporting structure 1A having three rollers in the width direction of the belt 2 at a position closest to the pulley 53.
However, in the middle, a gantry-fixed type belt support structure 1B having five rollers is located at a position closest to the trough 52,
The above-described belt support structure 1 having five rollers is arranged. These three belt support structures 1A and 1B
The curvatures of the curved lines formed by the respective roller rotation axes are gradually reduced in this order, and accordingly, the belt 2 is placed on the trough 52 with a reduced cross-section curvature in the width direction, I will run. The reason why the curvature-adjustable belt support structure 1 is arranged at the position closest to the trough 52 is that the belt 2 at this position
From the viewpoint of avoiding interference with the trough 52,
Because it is the most important.

Next, the belt 2 by the belt support structure 1
The curvature adjustment work, that is, the inclination adjustment work of each of the rotating frames 21 and 22 will be described. First, the belt support structure 1
First adjusting bodies 21g and 21i and second adjusting body 22c
Are fixed so that the tilt angles of the first rotating frame 21 and the second rotating frame 22 are designed values. In this state, it is arranged below the belt 2 together with the other belt support structures 1A and 1B.

Here, once the belt 2 is run, interference between the belt 2 and the trough 52 is confirmed. Since the belt 2 bends when a conveyed object is placed thereon, it is preferable that this interference check be performed while actually conveying the conveyed object. When interference is confirmed, it is determined whether the curvature of the belt 2 should be reduced or increased, and the process proceeds to the following adjustment work.

First, the bolts 41 and 42 of the first adjusting bodies 21g and 21i are relaxed in order to change the inclination angle of the first rotating base 21. In this state, the first rotation gantry 21 is rotatable about the rotation shaft 31 as indicated by an arrow P. When it is desired to reduce the curvature of the belt 2, the first rotating gantry 21 is rotated upward from here, and the bolt 41 is rotated at an appropriate position.
・ Tighten and fix 42. Conversely, when it is desired to increase the curvature, the first rotating base 21 is rotated downward and fixed.

At this time, the second rotating gantry 22 also moves at the same time.
By loosening the bolt 43 of (c), it is possible to freely rotate around the rotation shaft 32 as shown by the arrow Q,
The tilt angle can be adjusted independently of the first rotation gantry 21. After the adjustment, the bolts 43 are tightened and fixed.

In the actual adjustment operation, the curvature of the belt 2 and the curvature of the trough 52 are set to be equal to each other.
When the edge of the belt 2 is squeezed with respect to the trough 52, the running of the belt 2 may be smoother. In such a case, as described above, it is extremely convenient that the tilt angle of the second rotating frame 22 can be adjusted independently of the first rotating frame 21.

When the adjustment of the tilt angle of each of the rotating frames 21 and 22 is completed, the interference between the belt 2 and the trough 52 is confirmed again, and the adjustment operation is repeated if necessary. The above adjustment work is performed by the first adjusting member 21g or 21i or the second adjusting member 21.
If there is a means capable of firmly holding the rotating gantry 21 or 22 when j is relaxed and movable, the belt 2
It is also possible to run while checking interference. This eliminates the need for repetition of the adjustment, thereby shortening the working time.

In the above embodiment, the first rotating base 2
1 has an inner moving member 21c and an outer moving member 21d, these are connected by a connecting member 21e, and two first moving members are provided.
Although the tilting angle is adjusted by the adjusting bodies 21g and 21i, the inner moving member 21c and the outer moving member 2 are used.
Even if the lower part of each 1d is integrated and the moving part is formed in one place, the same inclination adjusting function is provided.

Further, in the above embodiment, each rotating base is configured to rotate about each rotating shaft. However, the means for adjusting and fixing the tilt angle of the rotating base is not limited to this mode. A support that can move in the vertical direction may be attached to the moving gantry, or may be suspended from above by a wire.

Further, in any of the embodiments, it is possible to add a fine adjustment device such as a screw mechanism or the like to each of the rotating bases, so that the fine curvature adjustment operation can be performed more easily. become.

In the above description, the belt support structure according to the present invention is used for the folded portion of the rollerless conveyor. However, the application of the belt support structure according to the present invention is not limited to this. The belt may be combined with a general roller conveyor which supports the belt in a curved shape, or the entire conveyor may be constituted only by such a belt support structure. The conveyor thus constructed can change the cross-sectional curvature of the belt depending on the form and shape of the conveyed material, which is convenient.

[0032]

As described above, according to the first aspect of the present invention, one belt support structure can correspond to a plurality of troughs having different curvatures on the curved surface.
Compared to the case where a plurality of belt support structures are prepared, the cost and the manufacturing period can be reduced.

According to the second aspect of the present invention, each of the rotating frames can be rotated and fixed at an appropriate position.
During installation, the curvature of the curved surface of the belt can be adjusted optimally.

According to the third aspect of the present invention, the movement of changing the tilt angle of both the first and second rotating frames is only the rotating motion about the respective rotating shaft. The adjustment work of the belt curvature is easy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view in the belt width direction showing an embodiment of a belt support structure according to the present invention.

FIG. 2 is a perspective view showing details of a sliding portion of the rotating gantry.

FIG. 3 is a side view of a rollerless conveyor folded portion to which the belt support structure according to the present invention is applied.

FIG. 4 shows (A), (b), (c), and (d) in order of AA line, BB line, CC line, and D line in FIG.
FIG. 4 is a sectional view taken along line D.

[Explanation of symbols]

 Reference Signs List 1 belt support structure 2 belt 10.11.12 roller 20 gantry body 20a fixed gantry 21 first rotation gantry 22 second rotation gantry 31.32 rotation axis 21g / 21i first adjustment body 22c second adjustment body 52 Trough 53 pulley

Claims (3)

[Claims] 1. A belt conveyor comprising: a plurality of rollers having rotation axes arranged in a width direction of a belt; and a plurality of platforms rotatably supporting the rollers, and the lower surface of the belt is curved by the rollers. In the supporting belt supporting structure, the pedestals of the rollers adjacent to each other in the width direction of the belt are rotatably connected to each other around a rotation axis in a running direction of the belt. Belt support structure. 2. A plurality of pedestals are arranged below a central portion in the width direction of the belt and fixed to a gantry body, and are sequentially connected to both sides of the fixed pedestal. The belt support structure according to claim 1, comprising a plurality of rotatable frames. 3. A plurality of the rotating frames, a first rotating frame connected to both sides of the fixed frame one by one, and a second rotating frame connected one by one to the outside of the first rotating frame. A first adjustment body having an upper end fixed to the first rotation gantry and a lower end attached to the gantry body so as to be vertically adjustable. One end is the second
3. The belt support structure according to claim 2, further comprising: a second adjuster fixed to the rotating gantry and having the other end attached to the first adjuster so as to be vertically adjustable.