JPH04191208A - Torsion prevention and correction device of pipe type belt in pipe conveyor - Google Patents

Abstract

PURPOSE:To improve torsion prevention and correction performance by bringing to contact one travel part of an endless correction belt with pressure on the outer peripheral surface of a torsional part of a conveyor belt by way of inclining it to the side opposite to the torsional direction concerning the forwarding direction of the conveyor belt in the device to convey bulk material. CONSTITUTION:A correction frame 12 is provided on a part of a conveyor belt 1 where a tendency to be distorted is strong in such a way to surround an outward belt 1a and an inward belt, and correction devices 14, 15 are respectively installed on the upper and lower parts of the conveyor belt 1 as shown in the drawing. These correction devices 14, 15 are supported free to revolve by a motor 21 around a support shaft 16 and constituted of an endless type correction belt 20. The correction devices 14, 15 are revolved by the motor 21 on the basis of a detection signal of a torsion detection device so that a central line L1 of the correction belt 20 is incline to the opposite side or a central line L0 of the conveyor belt 1a in the torsional direction A, and one travel part of the remedy belt 20 is contacted with the conveyor belt 1a with pressure.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a twist prevention/correction device for a pipe conveyor in which an endless conveyor belt is rolled into a pipe shape, and objects to be conveyed are placed inside and conveyed. Regarding.

[Conventional technology]

Most of the circulating endless conveyor belt is rolled into a pipe shape,
A pipe conveyor that continuously conveys powdered material wrapped therein is well known, and FIGS. 6 to 8 show examples thereof.

The flexible p# end conveyor belt (1) has an elastic tendency to curl around its longitudinal axis into a pipe shape, and as shown in FIG.
2) and the rear driven tram (3), it is rolled out flat, hung around each drum (2) and (3), and rotated in the direction of the arrow in Figure 6 with the whole body tilted forward and upward. It is now possible to

(4) is a support frame which is disposed in the longitudinal direction with continuous rods (5) at approximately constant intervals in the traveling direction of the conveyor belt (1) and faces perpendicularly to the conveyor belt (1);
As shown in the figure, it is divided into two upper and lower chambers (4a) (4b),
In the upper chamber (4a) there is an outgoing belt (1a) which is the outgoing part of the conveyor belt (1), and in the lower chamber (4b) there is a backward belt (1b) which is the inward part of the conveyor belt (1). is allowed to pass.

Inside both the upper and lower chambers (4a) (4b) of each support frame (4) are
A plurality of shape-retaining rollers (6) are pivotally installed on the same circumference at approximately constant intervals so as to substantially represent Saturdays and Sundays.

As shown in FIG. 8, the outgoing belt (1a), which has been flattened and has turned from the lower surface to the upper surface of the driven drum (3), is moved by supporting rollers (1a) that support the lower and side surfaces of the belt (1a), respectively. 7) by being guided by (8) and by its own elastic tendencies.

It gradually becomes rounded into a gutter shape.

While the outgoing belt (1a) is not fully rounded, a powder or granular material to be conveyed (10) is dropped onto the outgoing belt (1a) from the hopper (9) installed above the driven tram (3). be done.

Next, the outgoing belt (1a) is inserted into the upper chamber (
4a), is guided by shape-retaining rollers (6) and rolled into a pipe shape, and both ends of the belt (la) are overlapped upward, and the conveyed object (10
) is wrapped up.

The outbound belt (1a) that wraps around the transported object (10) is
The circumference is supported by shape-retaining rollers (6), and it travels while maintaining its pipe shape.

The outgoing belt (Ia), which has taken off from the frontmost support frame (4) near the front drive drum (2), is approximately symmetrical in front and back with the enveloping part of the conveyed object (10) shown in FIG. The conveyed object (10) is unfolded while passing through a belt unfolding device (not shown) configured as
) into the receiving box (11) provided at the lower front of the container.

The return belt (lb) that has passed through the driving drum (2) is rolled into a pipe shape as described above, passes through the lower chamber (4b) of each support frame (4), returns to the driven drum (3), and is circulated. do.

Such pipe conveyors are sometimes arranged as long as several hundreds of meters, but if the distance between the two drums (2) and (3) is too long, the following due to such causes.

The pipe-shaped conveyor belt (1) may be twisted around its axis.

(a) Uneven wear of each sliding part due to long-term use.

(b) Inconsistency in the position of each shape retaining roller (6).

(c) Manufacturing accuracy error of each shape retaining roller (6) and its support part.

(d) Uneven wear of each shape retaining roller (6).

(e) Non-uniformity in thickness, elastic hardness, etc. of the conveyor belt (1).

(f) Uneven arrangement of objects (10) to be transported.

In particular, if the outgoing belt (1a) is twisted, the transported object (10
) will spill out, and excessive force will be applied to the conveyor belt, drive motor, etc., significantly accelerating wear and tear.

As a device for preventing or correcting such twisting of the conveyor belt (1), for example, as disclosed in Japanese Patent Publication No. 1-46404 related to the patent application filed by the present applicant, a conveyor belt rolled into a pipe shape is used. At a location where the belt (1) has a tendency to twist, one or more of the shape retaining rollers (6) are arranged such that the side end in the direction in which the pipe-shaped conveyor belt tends to twist is By tilting the conveyor belt forward in the direction of movement of the conveyor belt with respect to the other end, a twisting force is applied to the pipe-shaped conveyor belt in the opposite direction to the direction in which it is being twisted. A device for preventing or correcting twisting of a conveyor belt, and Utility Model Application Publication No. 1982-119315, Utility Model Application Publication No. 62-11931
As disclosed in Publication No. 6 and Japanese Utility Model Application No. 62-119317, etc., based on the operation of a torsion detection device that detects the torsion of a conveyor belt (1) rolled into a pipe shape,
The shape retaining roller (6) is tilted by automatically adjusting the inclination angle of the straightening roller pressed against the outer surface of the pipe-shaped conveyor belt (1) with respect to the traveling direction of the conveyor belt (1). There are devices that use similar principles and functions to prevent or correct twisting of the conveyor belt (1).

[Problem to be solved by the invention]

In the conventional twist prevention/correction device for the pipe-shaped conveyor belt (1) in the pipe conveyor as described above, the inclined shape-retaining roller or straightening roller is, in principle, There is only point contact,
Only the frictional force of this part causes the conveyor belt to generate a twisting force in the opposite direction to the twisting force for preventing or correcting twisting, so if there is a strong tendency to twist, the above points should be avoided. Slip may occur at the contact portion, and sufficient twist prevention or straightening action may not be achieved.

In view of these problems with the conventional technology, the present invention provides a pipe conveyor that increases the frictional force between the twist prevention/correction means and the conveyor belt, thereby exhibiting a large twist prevention/correction effect. The purpose of the present invention is to provide a device for preventing and straightening a pipe-shaped belt from twisting.

[Means to solve the problem]

In order to achieve the above object, the device for preventing and straightening a pipe-like belt in a pipe conveyor of the present invention rolls most of the endless belt-like conveyor belt that runs in circulation into a pipe shape, and stores objects to be transported therein. In a pipe conveyor that wraps and continuously conveys the
By pressing one running part of an endless straightening belt that is wrapped around a pair of rollers at an angle to the side opposite to the direction in which the conveyor belt tends to twist with respect to the traveling direction of the conveyor belt, The present invention is characterized in that a twisting force is applied to the pipe-shaped conveyor belt in the opposite direction to the direction in which it is to be twisted, thereby preventing or correcting twisting of the pipe-shaped conveyor belt.

The pair of rollers around which the correction belt is wound is preferably shaped like a drum with an arcuate depression in the center.

[For production]

As the conveyor belt advances, the correction belt is rotated in contact with the outer peripheral surface of the conveyor belt which is rounded into a pipe shape.

At this time, the direction of movement of the correction belt is in a direction that is inclined to the side opposite to the direction in which the pipe-shaped conveyance belt is about to be twisted. Due to the frictional force between the belt and the belt, a twisting force is applied in the same direction as the direction of movement of the correction belt, that is, in the opposite direction to the direction of twisting, and the twisting of the conveyor belt is prevented.

or be corrected.

In this case, the straightening belt is in at least line contact with the conveyor belt, or by elastically bending the straightening belt, it is in surface contact and a large frictional force is obtained, so that it has an anti-twisting effect or a twist correcting effect. becomes a dog.

If the pair of rollers around which the correction belt is wrapped are shaped like a drum with an arcuate recess in the center, the correction belt can be brought into reliable surface contact with the conveyor belt, and a larger frictional force can be obtained.

〔Example〕

Embodiments of the present invention will be described below based on the accompanying drawings.

1 to 3 show a first embodiment of the present invention.

In the first embodiment, the same constituent members as those shown in FIGS. 6 to 8 described above are shown with the same reference numerals, and detailed explanation thereof will be omitted.

(12) is fixed to the continuous rod (5) so as to surround the outbound belt (1a) and the return belt (lb) at a location where the conveyor belt (1), which is rolled into a pipe shape, has a strong tendency to twist. It is a rectangular correction frame with a partition plate (13) provided in the center and an upper plate (12) of the correction frame (12).
A) is provided with correction devices (14) and (15) for preventing or correcting twisting of the outgoing belt (1a).

The lower correction device 1t (14) has a vertically facing support shaft (16) rotatably installed in approximately the center of the partition plate (3).
).

The center of the lower surface of a horizontal roller support plate (17) facing in the longitudinal direction is fixed to the upper end of the support shaft (16).
Projections (+
7a) A pair of front and rear rollers (19) are pivotally supported with shafts (18) facing in the left-right direction, and around both rollers (19) there is a rubber or other flexible material. An endless correction belt (20) consisting of

A deceleration motor (21) capable of forward and reverse rotation is provided on the top surface of the partition plate (13).
)'s output shaft (21a) passes through the partition plate (13),
It protrudes downward.

An arm (22) whose base is tightly fitted to the lower end of the support shaft (16)
A pin (23) is provided protruding from the lower surface of the tip.

Connect this pin (23) to the output shaft (2) of the deceleration motor (21).
1a), the base of which is firmly fitted into the link (24), is slidably engaged with a longitudinally facing elongated hole (25) drilled in the tip of the link (24), thereby connecting the support # (16) and the deceleration motor (21). and the output shaft (21a) are linked to each other.

The upper correction device (15) is the lower correction device! (14)
The above-mentioned structural members (symbols (16) to (25)
)) and vertically symmetrical members (these are shown with the same reference numerals as in the lower correction device (14), and detailed explanations are omitted).
The following changes were made.

That is, the upper correction bag! ! In (15), a support shaft (16) is provided through the center of the upper plate (12a) so as to be slidable in the vertical direction and rotatable;
Between the lower surface of 2a) and the upper surface of the roller support plate (17),
By compressing the compression coil spring (26) fitted onto the support shaft (16), the correction belt (20) is urged downward so as to come into pressure contact with the upper surface of the pipe-shaped outgoing belt (1a). There is.

In addition, a cylindrical body (27) fixed to the base end of the arm (23) and oriented in the vertical direction is fitted onto the upper part of the support shaft (16), and a vertically oriented cylindrical body (27) is provided with a cut in the side surface of the cylindrical body (27). Long hole (2
8), by slidably engaging the pin (29) protruding from the side surface of the support shaft (16), the support shaft (16) and the arm (23) can be moved up and down. They can move in any direction, but cannot rotate relative to each other, and are linked to each other.

Each deceleration motor (21) in the upper and lower correction devices (15) (14) is, for example, the
A known torsion detection device such as that disclosed in the publication No.
Based on the detection signal from the belt (path shown), each correction belt (20) is controlled by an appropriate control device (path shown) so that each correction belt (20) is oriented in a direction that corrects or prevents the twist.

That is, when the torsion detection device does not detect any torsion in the outgoing belt (1a), the center line (20) of the correction belt (20)
LL) (see Figure 1) is the rolled outgoing belt (1a
) so that it coincides with the center line (LO) of

By doing this, the correction belt (20) is moved forward by the forward belt (1a) as the forward belt (1a) advances.
) and run endlessly around a pair of rollers (19), and due to the frictional force at that time, the outgoing belt (
1a) is prevented from twisting.

That is, in this state, even if the forward belt (1a) tries to twist, the correction belt (20) is prevented from proceeding in a direction different from the center line (LO), and proceeds only in the direction of the center line (LO). You will be guided as follows.

When the torsion detection device detects that the outgoing belt (1a) is twisted, for example, in the direction shown by the arrow (A) in FIG. The deceleration motor (21) is controlled so as to face (L'0) in the direction shown in the first diagram, which is opposite to the direction of the arrow (A).

Then, the correction belt (20) is attached to the outgoing belt (1a).
Due to the frictional force with
) is corrected.

In this case, the correction belt (20) is
), at least in line contact at the center line (LL), or by the flexibility of the straightening belt (20).

Since the straightening belt (20) is elastically bent to make surface contact and a large frictional force is obtained, it is possible to exhibit greater twist prevention and twist correction effects than those using conventional straightening rollers.

In the first embodiment, the torsion correcting device is not provided on the returning belt (1b) side, but a device similar to the torsion correcting devices (14) (15) on the outgoing belt (1a) side may be provided.

In addition, among the upper and lower torsion correction devices (15) (14),
Either one may be omitted.

Further, in locations where the conveyor belt (1) tends to always be twisted in a certain direction, the correction belt (20) is made to form a required inclination angle with respect to the direction of movement of the conveyor belt (1). The roller support plate (17) is attached to the correction frame (12).
) or directly fixed to the connecting rod (5), etc.

FIG. 4 shows a second embodiment of the invention.

In the second embodiment, the pair of rollers (30) around which the @positive belt (20) is wound is shaped like a drum with an arcuate recess at the center.

The other structure is the same as that of the first embodiment.

When configured as in the second embodiment, the correction belt (20)
However, the central portion is recessed following the shape of the roller (30), and when it comes into contact with the outer circumferential surface of the conveyor belt (1), which is rolled into a pipe shape, surface contact is likely to occur.

A large amount of frictional force can be obtained.

FIG. 5 shows a third embodiment of the invention.

In the third embodiment, on the surface of the correction belt (31),
A large number of protrusions (31a) parallel to the roller (I9),
By forming the correction belt (31) at equal intervals in the longitudinal direction, the frictional force with the conveyance belt (1) is increased.

In addition, instead of the protrusions (31a), by forming a large number of irregularities such as circular or other protrusions or wave-shaped protrusions on the surface of the correction belt (31), the frictional force with the conveyor belt (1) can be increased. You can also stir it.

〔Effect of the invention〕

According to the present invention, the endless straightening belt wrapped around a pair of rollers is brought into pressure contact with the outer circumferential surface of the pipe-shaped conveyor belt while being inclined in a predetermined direction. The correction belt makes at least a line contact with the belt, or comes into surface contact with the belt due to elastic bending, and a large frictional force is obtained.

As a result, it is possible to exhibit a significantly greater twist prevention effect and twist correction effect than in the case of a conventional inclined correction roller or shape retaining roller that is brought into point contact with the conveyor belt.

[Brief explanation of drawings]

1 is a partially cutaway plan view of a main part of a pipe conveyor equipped with a first embodiment of the present invention; FIG. 2 is a sectional view taken along line nn of FIG. 1; FIG. FIG. FIG. 4 is a perspective view of main parts of a second embodiment of the present invention. FIG. 5 is a side view of main parts of a third embodiment of the present invention. Fig. 6 is a schematic side view of a conventional pipe conveyor, Fig. 7 is an enlarged cross-sectional view along the line ■-■ in Fig. 6, and Fig. 8 is an enlarged cross-sectional view along the line ■-■ in Fig. 6. Plan. (1) Conveyor belt (1a) Outbound belt (1
b) Return belt (2) Drive drum (3) Followed drum (4) Support frame (4a) Upper chamber
(4b) Lower chamber (5) Connecting rod
(6) Shape retaining roller (7) (8) Support roller (9
) Hopper (lO) Items to be transported (11) Receiving box (12) Correction frame (12a) Upper plate (13
) Partition plate (14) (15) Orthodontic device (
16) Support shaft (17) Roller support plate (
17a) Projection piece (18) Shaft (19) Roller (20) Correction belt (21) Deceleration motor (21a) Output shaft (22) Arm
(23) Pin (24) Link
(25) Long hole (26) Compression coil spring (27
) Cylinder (28) Long hole (29) Pin (
30) Roller (31) Correction belt (3
1a) Projection-1 City type 3 Figure 4

Claims (2)

[Claims] (1) In a pipe conveyor in which most of the endless belt-shaped conveyor belt that runs in circulation is rolled up into a pipe shape, and the conveyed object is wrapped in it and continuously conveyed, the pipe-shaped conveyor belt tends to twist. Place one running part of an endless straightening belt wrapped around a pair of rollers on the outer circumferential surface of the area where the tendency occurs, on the side opposite to the direction in which the conveyor belt is going to twist with respect to the direction of travel of the conveyor belt. By applying pressure to the pipe-shaped conveyor belt at an angle, a twisting force is applied to the pipe-shaped conveyor belt in a direction opposite to the direction in which it is to be twisted, thereby preventing or correcting twisting of the pipe-shaped conveyor belt. A device for preventing and straightening pipe belts from twisting in pipe conveyors. (2) The device for preventing and correcting twisting of a pipe-shaped belt in a pipe conveyor according to claim (1), wherein the pair of rollers around which the correction belt is wound are shaped like a drum with an arcuate concave central portion.