JPH0462964B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a perforated endless belt in which a plurality of tensile strength cores such as steel cords are embedded in the longitudinal direction of the belt, which is particularly useful as a conveyor belt, and a method for manufacturing the same. Regarding the improvement of

(Prior art) Conventionally, perforated endless belts in which multiple tensile strength core cords such as glass fiber cords and steel cords are embedded in the longitudinal direction of the belt are as follows.
Manufactured by the method described in (a) and (b).

(a) Manufactured by a method in which a continuous tensile strength core cord is wound into a coil between a pair of support rolls spaced apart by a predetermined distance, and both sides of the cord are covered with a cover rubber layer.

(b) Once a belt with a tensile strength core is created, it is cut to the required length and both ends are endlessly processed using a conventional method (for example, the core at the joints at both ends is The core body is assembled from both ends in a nested manner, and then the cover rubber layer is laminated via unvulcanized rubber for adhesion and vulcanized and bonded.

(Problems to be Solved by the Invention) However, the manufacturing methods described in (a) and (b) above or the belts manufactured by these methods have the following drawbacks.

First, in method (a), the tensile cores are wound in a coil, so the tensile cores are necessarily arranged obliquely to the longitudinal direction of the belt. When drilling a hole in the belt surface to attach the locking piece to the belt surface, if the tensile strength core is a steel cord, it is impossible to punch a hole in the part where the cord is, so If you tried to avoid punching holes, you would not be able to make the holes in a straight line around the entire circumference of the belt, and as with the same cord, you would only be able to punch the holes diagonally. Therefore, there was an inconvenience that the locking piece attached to the hole could only be attached in an oblique state. On the other hand, if the tensile strength core is a glass fiber bar cord, it is possible to punch out the cord and make a straight hole, but since the core cord is exposed in the cross section of the hole, moisture etc. This intrusion caused the core cord to peel off from the notch, resulting in a shortened belt life.

Further, according to the method (b), although linearly aligned holes can be provided, the bonding efficiency of the endlessly processed part is lower than that of the main body part, so bending fatigue occurs early, resulting in a short life. Furthermore, since the core cords are nested in the endless processing section and the number of cords is doubled, the rigidity is increased, the distance between each tensile strength core is narrower, and the core cords are also bent. The thickness of the cord also increases, and the pitch of the cord increases.
Due to poor dimensional accuracy, the belt meandered during running, making it difficult to run stably.

(Means for Solving the Problems) The present invention was invented in view of the above-mentioned problems.The present invention has been invented in view of the above-mentioned problems. It is an object of the present invention to provide a perforated endless belt in which holes used for this purpose are arranged linearly and orderly in the longitudinal direction of the belt.

The configuration of the present invention will be explained below.

In other words, the gist of the present invention is that, in an endless belt in which a plurality of tensile strength cores are embedded in the longitudinal direction, the joining points at both ends of the strength cores are distributed at intervals over the entire circumference of the belt. A first invention provides a perforated endless belt, characterized in that a plurality of joints are not present in the same width direction, and a plurality of holes are bored in the longitudinal direction between the arrays of tensile strength cores. And also,
A tensile strength core is suspended between a pair of support rolls arranged at a predetermined interval, and both ends of the core are joined to form a plurality of endless cores, and the endless core is stretched to an appropriate length on the support rolls. After the joints of the endless core are dispersed over the entire circumference so that they do not exist in the same width direction, a cover rubber layer is provided on both sides of the endless core by a conventional method, and the tensile strength core is A second invention provides a method for manufacturing a perforated endless belt, characterized in that a plurality of holes are bored in the longitudinal direction between the arrays of the perforated belt.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view in the width direction of the belt of the present invention, and FIG.
3 is a cross-sectional view in the width direction of a toothed endless belt to which the present invention is applied;
The figure is a side view of the same, FIG. 5 is a perspective view of the same, FIG. 6 is a side view of a case where a bucket belt is attached as a locking piece to the belt of the present invention, and FIG. 7 is a view of FIG. 1 (or FIG. 3).
FIG. 8 is a partially cutaway plan view of the belt described in FIG.

In these drawings, numeral 1 indicates the belt body;
2 is a tensile strength core, and 3 is a hole. Further, reference numeral 4 denotes toothed portions provided on one side of the belt, which are provided at constant intervals in the longitudinal direction across the width of the belt.

Reference numeral 5 denotes a bucket (locking piece) attached to the hole of the belt of the present invention by a fitting 6. 7 is a locking piece attached to the hole of the belt of the present invention by a fitting 11, and 8 is a conveyed object.

Further, reference numeral 9 denotes joints between the tensile strength cores, which are distributed at intervals in the longitudinal direction over the entire circumference between the tensile strength cores, so that at least a plurality of joints do not exist in the same width direction. be. 10 is a cover rubber layer that covers the tensile strength core layer from both sides.

Note that 12 is a pulley and 13 is a toothed pulley.

In the above, the hole drilled in the belt body is
Usually, the belt is provided through the array of tensile strength cores at regular intervals in the longitudinal direction of the belt, and the strength cores are made of a material such as steel cord, glass fiber cord, or carbon fiber cord. However, it may be selected as appropriate depending on the use of the belt.

The endless belt of the present invention is constructed as described above, and an example of its manufacturing method is as follows.

First, a pair of support rolls (one roll is a driving roll and the other roll is a driven roll) have tensile strength cores of a predetermined length arranged at a predetermined interval.
A plurality of endless cores are formed by adjusting the length of the tensile core using a jig suspended between them and placed on a table, and joining both ends of the tensile core by a joining means such as welding. , so that there are no plural joints of the endless tensile strength core in the same width direction (in other words, there is no more than one joint in the same width direction), the joints are gradually connected around the entire circumference of the belt, Move and disperse at appropriate intervals. Next, a suitable tension is applied to these endless core bodies, and a cover rubber is laminated thereon via an adhesive unvulcanized rubber by a conventional method. Finally, the entire belt is vulcanized by a conventional vulcanization method (usually using a step press method) to completely adhere the cover rubber layer and the tensile core, and then By drilling a plurality of holes in the longitudinal direction, the belt targeted by the present invention can be obtained.

In addition, as a means of joining the above-mentioned tensile strength core,
Specifically, brazing, fusion welding, mechanical bonding using sleeves, etc., or chemical bonding using rubber or synthetic resin may be used, but depending on the tensile strength core used, Select one that does not cause damage to the material.

(Effects of the present invention) The belt of the present invention having the above-mentioned configuration has the following effects.

(1) In the belt of the present invention, the plurality of tensile strength cores embedded therein are endless, and the joints of each strength core are distributed over the entire circumference of the belt and are arranged in the same width direction. Since one or more joints are not present, parts of the belt that are weaker in strength than the main body, such as bending strength at joints, are dispersed throughout the belt. Since there is no possibility of strength deterioration at joints), the risk of belt breakage during use is eliminated.

(2) In addition, in the belt of the present invention, the tensile strength core embedded therein is not a continuous coil shape as in conventional belts, but is an independent ring shape for each belt, so it does not run diagonally. They can be arranged in parallel in a straight line, and the number and pitch of the arrangement can be arbitrarily designed and manufactured. Furthermore, it is possible to alternately arrange the S-twist and Z-twist core bodies, and this alternating arrangement cancels out the repulsion of the twists, resulting in no distortion during vulcanization and stable runnability. It can be a belt.

(3) In addition, since multiple tensile strength cores can be arranged linearly in parallel with each other, the multiple holes drilled in the belt can be linearly arranged around the entire circumference of the belt without breaking the strength cores. Since it is possible to drill holes in an aligned manner, there is no problem of water entering through the notch in the tensile strength core and peeling from the notch.
The life of the belt can be extended.

(4) As mentioned above, since the holes can be arranged in a straight line, it is also possible to install locking pieces (accessories) such as horizontal bars or buckets in the same hole in a straight line. It allows for aligned installation, and when used as a belt to transport cardboard boxes while vacuuming through the holes, the vacuum's suction function can be made almost the same at all holes, resulting in stable conveyance performance. It is possible to hold the

(5) Furthermore, according to the manufacturing method of the present invention, by arbitrarily setting the interval between the pair of support rolls,
The length of the tensile strength core suspended thereon can also be long, and long belts can also be manufactured by using a corrugated press as the vulcanizer.

(6) Furthermore, the belt of the present invention can also be used as a belt for conveying conveyed objects containing a large amount of moisture while removing moisture, unless accessories such as locking pieces are attached. It can also be used as a belt in the manufacturing process of bonding cloth, etc., and can also be used as a belt for conveying while drying the bonded area by blowing air through the holes from the back side of the belt. In particular, since the holes drilled in the belt of the present invention are linearly aligned in the longitudinal direction, the holes can be drilled at equal intervals corresponding to the pitch of the teeth of the sprocket. It can also be used as a power transmission belt.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view in the width direction of the belt of the present invention, and FIG.
3 is a cross-sectional view in the width direction of a toothed endless belt to which the present invention is applied;
The figure is a side view of the same, Figure 5 is a perspective view of the same, Figure 6 is a side view of the belt of the present invention with a bucket belt attached as a locking piece, and Figure 7 is a view of Figure 1 (or Figure 2).
FIG. 8 is a partially cutaway plan view of the belt described in FIG. 1... Belt body, 2... Tensile core, 3...
Hole, 5...bucket (locking piece), 6...attachment, 7...locking piece, 8...transferred object, 9...junction, 10...cover rubber layer, 11...attachment, 12...Pulley, 13...Toothed pulley.

Claims (1)

[Scope of Claims] 1. In an endless belt in which a plurality of tensile strength cores are embedded in the longitudinal direction, each joining point at both ends of the strength strength cores is distributed at intervals over the entire circumference of the belt, and in the same width direction. is a perforated endless belt characterized by eliminating the presence of a plurality of joints and having a plurality of holes drilled in the longitudinal direction between the arrays of tensile strength cores. 2. The perforated endless belt according to claim 1, wherein one side of the belt has a toothed portion. 3 A tensile strength core is suspended between a pair of support rolls arranged at a predetermined interval, and both ends of the core are joined to form a plurality of endless cores, and the endless core is appropriately placed on the support rolls. After moving length by length to disperse the joints of the endless core over the entire circumference so that they do not exist in the same width direction, a cover rubber layer is provided on both sides of the endless core by a conventional method, and a tensile core is formed. A method for manufacturing a perforated endless belt, which comprises punching a plurality of holes in the longitudinal direction between arrays of bodies.