JPS59163209A - Method and device for exchanging conveyor belt - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD This invention relates to the removal and unwinding of elongate members, and more particularly to the replacement of conveyor belts.

[Prior art]

A typical conveyor belt system includes an endless belt for transporting articles mounted on a support frame and a drive mechanism attached to the endless belt for rotating the belt.

In many cases, conveyor belt equipment is
It has a very elongated length.

Such belts usually comprise a series of interconnected belt sections that are very long and extend horizontally and/or obliquely to the horizontal.

Belts with very long lengths are relatively heavy, something that must be taken into account when replacing damaged belts or portions of belts. This will be explained with reference to FIG. 1. Belt 10, or a portion of the belt, is replaced by the following four operations.

■ Separate the belt into two at position 12 0 ■ Drive one end of the separated belt with power to trace the roll, fray roll 1
Connect to 4.

(2) Connect the other end of the separated belt to the replacement belt on the replacement roll 16;

(2) Winding up the damaged belt or part of the belt onto the power-driven hoisting winder and unwinding the corresponding replacement belt or replacement belt part from the replacement belt roll 16 in one direction.

In this case, both belt ends are connected to guide sleeves 17 and 19
Run around the area.

It will be clear that in the case of long and heavy belts, considerable forces are generated that cannot be applied without consideration.

For example, FIG. 1 illustrates an angled belt arrangement, i9
9. This is for example to transport ore upwards to the ground surface.
used in mining operations. The belt comprises an upper working run 26 and a lower working run 28. It is clear that the influence of gravity acting on both belt runs results in forces F' and F〃 having relatively large values, which forces are transmitted to the take-off roll 14 and the pay-off roll 16, respectively. Thus, it is necessary that there be a substantial external winding force on the take-up roll to overcome said resisting force F' before the belt can be removed) and that the replacement belt will run out of control under the unwinding force F. To prevent this, it is necessary to strongly brake the feed belt. Meeting such requirements results in the need for equipment that is relatively expensive, bulky, and cumbersome to handle. For example, a number of hydraulic winders may be connected in series to generate sufficient winding force to overcome the initial belt resistance force F'; Like the brake device above,
A plurality of brake devices are typically provided to slow or stop the payout of the replacement belt.

These types of devices are expensive and their use is time consuming and difficult, making the entire belt replacement operation costly.

It is clear that the winding resistance force F' and the unwinding force F〃 occur not only in the case of an obliquely arranged belt, but also in the case of a horizontally arranged belt. That is, in the return travel section, the belt sag that typically occurs in horizontally oriented belts (and also in slanted oriented belts) creates unwinding resistance and unwinding or pulling out resistance that must be overcome by the hoist and brake system. will occur.

[Purpose of the invention]

Accordingly, the present invention seeks to minimize or overcome the aforementioned problems.

Another object of the invention is to provide a new belt changing method and apparatus that overcomes winding resistance and pull-out forces in a simple and inexpensive manner.

Yet another object of the present invention is to provide a novel method and apparatus in which the winding resistance force and the unrolling or pulling force effectively oppose each other.

Yet another object of the invention is to enable the winding up of a damaged belt section and the unwinding of a replacement belt section with minimal energy consumption.

[Structure of the invention]

The objective is to allow the belt to be taken out by the take-out mechanism and to allow the belt to be fed out so that the take-out end of the belt is taken out by the take-out mechanism and the belt cancels out the take-out resistance force that tries to resist the take-out of the take-out end and the pull-out force that tries to pull out the replacement end. This is achieved by the present invention, which relates to a method and apparatus for replacing at least a portion of a conveyor belt whose ends are unrolled by an unwinding mechanism. According to the present invention, a force transmission mechanism interconnects the take-out mechanism and the pay-out mechanism in order to create a relationship that neutralizes the take-out resistance force and the pay-out force.

In this way, at least a substantial portion of the withdrawal force and the dispensing force will be offset, thereby significantly reducing the power required by the dispensing mechanism.

Preferably, said unloading mechanism comprises an unloading tensioning mechanism comprising at least one roll around which the belt extends, and said unwinding mechanism comprises at least one roll around which the belt extends. It includes a tensioning mechanism for feeding. Preferably, the force transmission mechanism interconnects the plurality of rolls by wrapping an endless belt around a striped rocket wheel connected to each roll.

〔Example〕

Objects and advantages of the invention will become more apparent from the following detailed description of a preferred embodiment of the invention, taken in conjunction with the accompanying drawings.

FIG. 1 shows the inclined belt system in which the endless conveyor belt lo includes an upper working run 26 and a lower return run 28. FIG. As used herein, the term "belt" shall mean all types of conveyor belts, including belts with a warped or irregular surface, i.e., without holes, as well as belts of the mesh type. This also includes those with holes such as. The belt extends around the upper blade pulley 3o and the lower tail pulley 32. A conventional support mechanism (not shown) is provided to support and guide the belt.

An inclined belt of this type, which is inclined with respect to the horizontal, can be used in mines, for example, to convey ore towards a sink 36 on the ground surface 38.

A conventional belt tensioning pulley mechanism 40 is provided to maintain uniform tension on the belt. As previously mentioned, belt changing devices are connected to both ends of the belt. That is, after the belt 10 is separated into two parts, one end of the belt is connected to a take-up roll 14 of a take-out device, while the other end of the belt is wound around a pay-out roll, that is, a replacement roll 16 of a pay-out device. connected to the belt.

It is necessary for the drive motor of the hoist roll to be able to resist any forces F' generated by the weight of the working run of the belt and which resist removal of the belt. Similarly, in order to prevent the unwinding speed of the replacement roll from becoming too fast under the influence of the unwinding force Fl produced by the weight of the return run of the belt, Multiple brake devices are provided to slow down the unwinding speed.

In the illustrated inclined belt device, the magnitudes of the pull-out resistance force F' and the pull-out force F are increased or decreased by the influence of gravity depending on the degree of inclination of the belt. Even for a similar type of belt used horizontally, the pull-out resistance and pull-out force are mainly due to the weight of the belt, which causes the belt to sag in the return running section. It will be clear that the braking system needs to be high in order to overcome these resistance forces F' and FI.

However, according to the invention, by interconnecting the hoisting device and the unwinding device in such a way that the withdrawal force F〃 and the withdrawal resistance force F'' are mutually neutralized, said resistance force F〃 and the force F〃 are reduced in energy. Overcome with minimal consumption.

The pick-up and payout devices of the invention each include a tensioning mechanism 18.20 (FIGS. 2 and 3) around which the belt is threaded. As shown in FIG. 3, the ejection tensioning mechanism 18 includes a set of rollers,
That is, 3 rotatable around preferably parallel horizontal axes.
It comprises rolls 42, 44 and 46 of books. Two of the three rolls 42, 46 are arranged vertically one on top of the other, and the third middle roll 44 is horizontally offset with respect to the two rolls and vertically staggered. It is arranged in a shape. The third roll 44 has a shaft 48 connected to a fluid-actuated prime mover, such as a hydraulic cylinder, which is operative to move the shaft within the guide 51 . This third roll 44 thus constitutes a tension roll which is repositionable relative to a plane containing the axes of the other two rolls 42 and 46. This occurs because the lever belt 10 is wrapped around the rolls 42, 44 and 46 in an S-shape. When changing the position of tension roll 44, the belt is firmly pressed against all rolls to prevent relative tension between the three rolls; fluid-actuated with three rolls 52, 54 and 56; A similar device consisting of a prime mover 58 is provided at the other end of the belt 10 that is to be delivered. It will be understood that the other end of the belt referred to herein includes the replacement bell (IOA) that is attached to and becomes a part of the original belt.

A conventional hoisting motor (not shown) is coupled to the hoisting roll for hoisting the working track.

The neutralization between the resisting force F' and the withdrawal force 217 is achieved by using a force transmission connection between the rolls of the withdrawal tensioner fl'18 and the rolls of the withdrawal tensioner. . That is, the sprocket wheels 62 and 66 are connected to the first roll 42 and the second roll of the extraction tensioner 18.
roll 46, while tin rocket wheels 72 and 76 are formed as part of the first roll 46 of the drawer tensioner.
a first endless chain 78 interconnects the sprocket wheel 62 and the sprocket wheel 72 to form a first pair, and a second endless chain 80 interconnects the sprocket wheel 64 and the sprocket wheel 74 to form a second pair. Additionally, an adjustable tensioning pinion 82,84 engages each chain.

A belt 5 with a tin rocket wheel 72
A friction brake device 75 is used to generate sufficient tension in the portion 10A' of the replacement belt located upstream of the upper sprocket wheel 72 to bias it toward the upper sprocket wheel 72 to provide a positive frictional engagement. provided. This friction brake device 75 does not include a pair of gripping elements 77, 79;
These gripping elements 77, 79 are pressed against each other by a suitable pressing device in order to generate the requisite positive friction between the bell) IOA and the roller 52 with the sprocket wheel 72. The running of the belt 10A is braked by friction.

In a stationary conveyor device, the initial take-out resistance force F
' is the 10th part of the tensioning device taken out via the belt 10.
It will be apparent that rollers 42 and 20-46 act to rotate them and the sprocket wheels associated with them with a clockwise torque T' as viewed in FIG.

On the other hand, the initial payout or pullout force F is applied to the 10th roller 52 and the 20th roller 56 of the pullout tensioning device with a torque TI in the counterclockwise direction as viewed in FIG. It is clear that the effect is to rotate the sprocket wheel. Force transmission chain 78
．． 80 transmits said torques T' and T'' in opposite directions, i.e. in a neutralizing relationship.
If ' and T'' are equal, as is usually the case, complete cancellation of both torques occurs.

Assuming both torques completely cancel each other out,
It is sufficient that a minimum amount of winding force is generated upon starting the lifting roll 14.

It is clear that the take-off device and the pay-out device can be interconnected in other ways to eliminate the two mutually opposing forces.

For example, only one roll can be used interconnected in each of the inflation devices. Alternatively or additionally, a direct connection between the take-up roll and the take-off roll can be provided.

It is also possible to provide a force transmission link mechanism other than a chain, for example a gear.

Furthermore, as mentioned above, the present invention provides an inclined winding system in order to neutralize the unwinding force and the winding resistance mainly generated by the slack of the belt that occurs, especially in the return run. It can also be applied to a vertical (that is, horizontal) type of conveyance device.

It will be apparent from the foregoing discussion that by eliminating at least a substantial portion of the winding and unwinding forces, the energy required for the winding motor is significantly reduced. The apparatus and method according to the invention can be used as a platform for the replacement of entire belts, or simply for the conversion of one or several points in a belt.

In operation, the belt 10 to be replaced partially or completely has a take-off end connected to a take-up roll 14 and an exchange belt (IOA) from an exchange roll 16.
They are separated by an area 12 with an unwinding end attached to it.

Belt 10 and belt 10A can be considered as one belt since they are interconnected. A naturally occurring winding resistance force F' acts on the rolls 42, 44 of the unloading tensioning device 18, and a naturally occurring unwinding force F〃 acts on the rolls 52, 56 of the unwinding tensioning device 20. do. These forces F' and FI are applied to the two swelling devices i8.2
This is done in neutralizing relation by a sprocket chain 78,80 interconnecting the corresponding rolls of 0. As a result, the unloading resistance force F' and the withdrawal force F are eliminated, thereby making it possible to significantly reduce the energy requirements of the take-up roll. As a result, the equipment used to change belts can be smaller, lighter and less expensive than the equipment previously required.

Although the present invention has been described with reference to a preferred embodiment, it will be apparent to those skilled in the art that changes, additions, deletions, and substitutions can be made to the present invention without departing from the spirit of the invention or the scope of the claims. be.

[Brief explanation of the drawing]

1 is a schematic front view of a conventional apparatus in which an inclined conveyor belt is replaced using a conventional take-up roll and a changeover roll, and FIG. FIG. 3 is a schematic front view showing the force transmission mechanism of FIG. 2; FIG. 3 is a front view of the force transmission mechanism of FIG. 10.104...belt, 18.20...swelling mechanism,
42.44,46,52,54,56...Roller, 6
2.66.72.76... Sprocket wheel, 7
8.80... Endless chain, F'... Pulling resistance force, F〃... Pulling force. Patent Applicant Palkan wTe') Alda Company Patent Application Agent Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Kyo Nakayama Patent Attorney Akira Yamaguchi Masaya Nishiyama

Claims (1)

[Claims] 1. A take-out in which the take-out end of the belt is taken out by a take-out means, the let-out end of the belt is let out by the let-out means, and the belt attempts to resist taking-out of the take-out end. A device for replacing at least a portion of a conveyor belt subjected to a resisting force and a pull-out force attempting to pull out the unwinding end, the changing device neutralizing the pull-out resisting force and the pull-out force. In order to make a relationship
Apparatus for exchanging at least a portion of a conveyor belt, characterized in that it comprises force transmission means interconnecting said ejecting means and said unwinding means. 2. said unloading means comprises an unloading tensioning mechanism comprising at least one roll around which said belt extends, said unwinding means comprising at least one roll around which said belt extends; 2. The apparatus of claim 1, further comprising an unwinding tensioning mechanism having at least one roll, said force transmitting means operatively interconnecting said plurality of rolls. 3. A tin rocket wheel is coaxially attached to each of the plurality of rolls, and the force transmission means includes an endless belt extending around the plurality of sprocket wheels. The device described. 4. Apparatus according to claim 2, in which the ejecting means comprises a reel, wherein the ejecting means comprises a reel. a dispensing device, the device comprising: dispensing means for dispensing one end of the elongated member; dispensing means for dispensing the other end of the elongated member; and interconnected with the dispensing means and the dispensing means. An elongated member ejecting and dispensing device comprising: force transmitting means for establishing a relationship that neutralizes a retracting force that causes said ejecting and a retracting resistance force that impedes said ejecting. 6. said ejecting means comprises an ejecting tensioning mechanism comprising at least one roll around which said elongate member extends; said ejecting means comprises at least one roll around which said elongate member extends; 6. The apparatus of claim 5, wherein said force transmitting means operatively interconnects said plurality of rolls, including an unwinding tensioning mechanism having at least one roll. 7. ejecting one end of the elongate member, wherein a retrieval resistance force acts on one end of the elongate member to impede ejection, and a retraction force acts on the other end of the elongate member to cause payout; On the other hand, in the device for unwinding the other end of the elongated member, the device comprises a force transmitting means that neutralizes the retracting force with respect to the retrieving resistance force. Feeding device. 8. Removing one end of the elongate member, wherein a retrieval resisting force acts on one end of the elongate member to prevent removal, and a retraction force acts on the other end of the elongate member to cause payout; On the other hand, in the method for feeding out the other end of the elongated member, the method comprises the step of bringing the drawing force into a neutralizing relationship with respect to the drawing resistance force. . 9. said elongated member comprising a conveyor belt, at least a portion of said conveyor belt being exchanged by removing said one end on an ejecting mechanism and feeding a corresponding portion of the replacement belt from an ejecting mechanism; 9. The method according to claim 8. 10. The method of claim 9, wherein said force transmitting steller f operatively interconnects said ejection mechanism and said payout mechanism.