JPH0558422A - Method and device for processing connecting ends of conveyer belt - Google Patents

Abstract

PURPOSE:To reduce the labor of a worker, and provide improved quality and high process efficiency in working the connecting end part of a conveyer belt. CONSTITUTION:The part near the end part of a conveyer belt 8 is fixed, and the cutting amount equivalent to the depth at respective stages is determined for the fixed part to feed a rotating cutting edge 20 in parallel to a surface (the upper surface or the lower surface of the conveyer belt 8), so that it is possible to cut off rubber and tension member canvas at the respective stages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stepwise machining the vicinity of an end of a conveyor belt having a body cloth inside, and a method for carrying out the method. It is related to the device.

[0002]

2. Description of the Related Art When connecting a conveyor belt having a body cloth between a cover rubber on an upper surface and a cover rubber on a lower surface for the purpose of making endless, a step-like (thickness is In many cases, a part (so-called step joint) is formed. That is, FIG.
As shown in (a) and (b), each core body cloth layer 8c is stepped on the conveyor belt 8 in a stepwise manner, and the exposed surface of each step is coated with an adhesive. Similarly, it is superposed on the end portion of the mating belt 8'which is similarly stepped. After overlapping, the upper and lower cover rubbers 8a ・ 8
Uncut rubber is filled in the cut-out portions 8p and 8q provided in the joint of b to perform vulcanization and adhesion.

Conventionally, the formation of the stepwise portion as shown in FIG. 4 has been performed by the process shown in FIG. That is, the worker makes a cut y at a position at the end of each step with the knife x, and subsequently, the upper layer (cover rubber 8a or core body fabric layer 8c) is grasped by the pliers z and pulled to be peeled off.

[0004]

When the stepped portion is formed on the conveyor belt 8 according to the above procedure, the work is manually performed, so that the following disadvantages occur.

A) The depth of the cut y by the knife x is not appropriate (for example, too deep to cut to the lower canvas), and a preferable step may not be formed. Quality is inconsistent.

(B) The peeling work performed by using the pliers z requires a considerable amount of force and often causes a backache of the worker, which is unfavorable for safety and hygiene.

C) One or two workers are required to fully exert their efforts, and it is difficult to shorten the required time. Therefore, the efficiency is extremely low. In the above peeling work, the pliers z may be pulled by a jack or the like in order to avoid heavy labor of the worker, but if this is done, the time required for the work is rather increased.

An object of the present invention is to provide a means for reducing the labor of a worker in processing a connecting end portion of a conveyor belt, improving and stabilizing the quality, and contributing to the efficiency of the process and the cost reduction. It is to be.

[0009]

A method of processing a connecting end portion of a conveyor belt according to the present invention (claim 1) is to fix a portion near the end portion of the conveyor belt, and to fix the fixed portion,
The amount of cut corresponding to the depth of each step of the stepwise portion is determined and the rotary blade is fed in parallel with the surface (the upper surface or the lower surface of the conveyor belt) to cut and remove the rubber and core fabric of each step. ..

According to the present invention, there is provided a device for processing a connecting end of a conveyor belt (Claim 2), a fixing means for fixing the vicinity of the end of the conveyor belt, and a rotary blade for cutting the surface of the fixed conveyor belt. The rotary driving means and the moving means of the blade are provided. In this device, as in claim 3, a face mill having a rake angle of 5 to 17 ° and cemented carbide chips arranged along a circle having a diameter of 80 to 250 mm may be used as the rotary blade. ..

[0011]

According to the processing method of the present invention (claim 1), each layer of the rubber of the conveyor belt and the core body cloth is removed by cutting with a rotary blade instead of peeling as in the conventional case. Therefore, with respect to the fixed end of the belt, 1) First, determine the depth of cut as an appropriate depth (for example, the depth including the first layer of the body canvas) and rotate it parallel to the surface of the belt. By sending a cutting tool and scraping the belt, the rubber and the core canvas up to the depth are cut and removed to form the first-stage plane, 2) Further on a part of the formed first-stage plane (or, The unprocessed part adjacent to the plane of the first stage) is processed by cutting the depth to the next layer of the body cloth with the cutting amount and feeding the rotary blade to process the plane of the second stage. For example, the end of the conveyor belt can be processed stepwise.

The cut amount of the rotary blade with respect to the fixed conveyor belt is determined so that the depth of each step is appropriate based on the measured values of the thickness of each layer and the like, and does not change during cutting. Each layer of canvas is always properly and accurately formed. Since the area of the step can be expanded to a required range only by feeding the rotary blade during cutting parallel to the belt surface, the worker is not forced to do heavy labor. Further, since rubber and canvas are materials that can be easily cut, the above processing can be efficiently performed in a short time.

The processing apparatus of the present invention (claim 2) smoothly carries out the above-described processing method for the end portion of the conveyor belt. That is, near the end to be processed stepwise,
The fixing means is fixed and the rotary blade is cut. The rotary blade is rotated by the rotation driving means, and the cutting amount and the feeding of the belt are set by the moving means, so that a step having a predetermined depth can be formed over a predetermined area.

In the processing apparatus according to the third aspect of the invention, the rotary blade is extremely suitable for cutting rubber and the body cloth, so that the above-mentioned processing is carried out particularly smoothly. Because a) the rake angle is 5
If the angle is less than °, it is difficult to cut, and if the angle exceeds 17 °, the cutting surface becomes too rough. B) If the diameter of the cemented carbide tip is less than 80 mm, the cutting required to form a single flat surface It is inefficient because the number of times (the total feed distance of rotary blades) increases, and conversely, when it exceeds 250 mm, it becomes difficult to process because it exceeds the width of each step (dimension in the length direction of the belt). This is because the device of claim 2 does not cause such inconvenience.

[0015]

1 to 3 show an embodiment of the present invention. FIG. 1 is a front view showing a processing device 1 for a conveyor belt 8, FIG. 2 is a plan view of the device 1, and FIGS. 3 (a) and 3 (b) are detailed views of a rotary blade 20 of the device 1.

As shown in FIG. 4, the processing apparatus 1 is for processing a conveyor belt (multi-layered canvas belt) 8 having a core fabric layer 8c therein for connecting the end portions thereof in steps for connection. As shown in FIG. 1, a gate-shaped frame 3 is provided on a base plate 2 having wheels 2a, and various processing equipments are incorporated therein. With reference mainly to FIGS. 1 and 2, equipment related to processing from the upper surface of the belt 8 will be described first.

Operation panel 4: This is for operating each of the following devices (having an operation function) in the device 1, and is provided with a large number of push button type switches 4a on the panel surface.

Feeding table 5: Rollers 5a are arranged so that the end portion of the belt 8 can be easily fed into the apparatus 1.

Fixing means 10: A table 11 provided at the tip of the above-mentioned feeding table 5, and a movable elevating type clamp 12, 13 for pressing near the end portion of the belt 8 thereon.
14 (Clamp 12 is, so to speak, Clamp 13
・ 14 is a temporary clamp).

Rotating knife 20: A tool for cutting the belt 8 fixed by the fixing means 10 as shown in FIG. 3 (a). A blade type in which a cemented carbide tip 22 is screwed to the end of a milling body 21. It is a face mill. In this example,
The corner angle α of the tip 22 with respect to the belt 8 (see FIG.
(See (b)) 45 °, rake angle β is 12 °, tip 2
The arrangement diameter D of 2 is 160 mm. Reference numeral 23 is a casing that incorporates the rotary shaft and the bearing of the blade 20.

Rotational drive means 30: Rotational drive of the rotary blade 20 is provided with a motor 31 and a speed reducer 32.

Moving means: A means for moving the rotary blade 20 in the three axial directions and stopping / holding it at an appropriate position, which is an assembly of many devices. That is, the movement amount (that is, the cutting amount or the feed amount) of the blade 20 or its position is displayed on the display surface 4.
In addition to the blade movement control board 41 which is digitally displayed on 1a, the casing 23 and a device for guiding and driving the blade 20 in each direction are included. Guidance and drive equipment
A rail 42 that guides the belt 8 in the longitudinal direction, a guide rail 43 that guides the belt 8 in the width direction, and a drive motor 44,
The guide rail 45 and the drive motor 46 are provided in the vertical direction, that is, in the direction perpendicular to the surface of the belt 8.

On the other hand, in order to form a cut portion (8q in FIG. 4 (b)) from the lower surface at the joint of the conveyor belt 8, this device 1 has another device similar to the above in the lower half of the frame 3. They are arranged in pairs. That is, the rotary blade 50 (arranged upwards, which is the reverse of the blade 20), the motor 61 and the speed reducer 62 for driving the blade, and the rails 73 and 7 for moving the blade 50 together with the casing 53.
5 and so on.

In the processing apparatus 1 configured as described above, a stepwise portion is formed in the vicinity of the end of the conveyor belt 8 as follows. That is, the end portion of the belt 8 to be processed is placed on the feeding table 5 and fed into the frame 3, and then fixed by the fixing means 10. That is, the front of the belt 8 is fixed on the table 11 by using the temporary clamp 13 on the right side of FIGS. 1 and 2, and the belt 8 is pressed by the temporary clamp 14 on the left side of the drawings while applying tension to the rear side. On top of that, this clamp 12
It is fixed by.

The operation panel 4 is operated to lower the blade 20 onto the belt 8 without rotating it to bring it into light contact with the upper surface,
The height of the blade 20 at this time is stored in the control panel 41.

The blade 20 is moved to the outside of the width of the belt 8 and lowered to a proper depth of the first step, which is obtained from the thicknesses of the cover rubber 8a and the body canvas layer 8c of the belt 8 which are actually measured in advance. This includes vertical rails 4
5 and the motor 46, the position display on the display surface 41a of the control panel 41 is used.

The blade 20 is rotated by the operation panel 4 and the motor 44 is activated to move the blade 2 in the width direction of the belt 8.
By sending 0, the first stage cutting is performed. The width of each step (dimension in the length direction of the belt 8) is the tip 2 of the blade 20.
Since it is usually larger than the arrangement diameter D of 2, the position of the blade 20 is slightly shifted in the length direction of the belt 8 (the casing 23 is moved along the rail 42), and the width direction of the belt 8 is also changed (from the above). The blade 20 is fed (that is, reciprocated) in the opposite direction so that the first step has a predetermined width. Rotation speed of the blade 20 is 300 to 600 rpm, and feed rate is 300 to 6
If it is set to 00 mm / min, the rubber of the belt 8 will not stick or smoke.

The position of the cutting tool 20 is moved in the length direction of the belt 8 by the width dimension of the first step, and subsequently, in the same manner as above, the second core body cloth layer 8c is cut and removed in the second step. The blade 20 is lowered to an appropriate depth, and the second stage cutting is performed according to the above.

After repeating the process according to the number of the body canvas layers 8c, the cut portion 8q is cut by the lower rotary blade 50.
(FIG. 4B) is formed. This may be performed by using the blade 50 on the cover rubber 8b on the lower surface side of the belt 8 and upwardly. The cut-off portion 8p on the upper surface (see FIG.
(b)) is also formed according to, but it may be carried out at this point, or may be carried out immediately after the above, instead of the first stage processing.

After processing the vicinity of the end portion of the belt 8 as described above, the belt 8 is removed from the processing device 1 and, as described above, joined to the other end portion similarly processed stepwise as shown in FIG. To do. The surface cut with the rotary knife 20/50 is rougher than the surface cut with a knife and has appropriate unevenness, so it can be bonded to the mating side without buffing (roughening) with wires. Good property.

[0031]

EFFECTS OF THE INVENTION According to the present invention, in processing a connecting end portion of a conveyor belt, 1) the labor of a worker is reduced and back pain is not caused, and 2) it is efficiently processed at low cost. 3) The processing quality is always maintained at a constant high level without making mistakes such as cutting the body canvas based on individual differences among workers and carelessness. Also, 4) the cut surface has an appropriate roughness, so that it is easy to adhere to the mating side, and 5) the rubber pieces that have been cut and removed are reused than those that were peeled off by the conventional method ( It is easy to form a rubber mat with a binder).

[Brief description of drawings]

FIG. 1 is a front view showing a processing apparatus 1 for an end portion of a conveyor belt according to an embodiment of the present invention.

FIG. 2 is a plan view of the processing device 1 of FIG.

3 (a) is a detailed view of a rotary blade 20 of the apparatus 1, and FIG. 3 (b) is an enlarged view of a portion b in FIG. 3 (a).

FIG. 4 (a) is a plan view showing a connecting end portion of a conveyor belt, and FIG. 4 (b) is a sectional view taken along line bb in FIG. 4 (a).

5 (a) and 5 (b) are perspective views showing a conventional processing method for an end portion of a conveyor belt.

[Explanation of symbols]

 1 Processing Device 8 Conveyor Belt 8c Core Body Canvas Layer 10 Fixing Means 20 Rotating Blade 22 Cemented Carbide Tip 30 Rotation Driving Means

Claims (3)

[Claims] 1. A method for processing a conveyor belt having a core fabric inside rubber, stepwise and stepwise for each layer of the core fabric for connection, wherein the end of the conveyor belt is processed. It is characterized by fixing the vicinity and cutting the rubber and core canvas of each step by setting the cut amount corresponding to the depth of each step and sending the rotary blade parallel to the surface to the fixed part And the processing method of the connecting end of the conveyor belt. 2. A conveyor comprising: fixing means for fixing the vicinity of the end of the conveyor belt; rotary blades for cutting the surface of the fixed conveyor belt; and rotation driving means and moving means for the blades. Belt end processing equipment. 3. A face mill having a cemented carbide tip arranged along a circle having a diameter of 80 to 250 mm at a rake angle of 5 to 17 ° as the rotary blade.
A processing device for connecting end portions of a conveyor belt according to.