JPS6150841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates generally to flexible belts, and more particularly to belts exhibiting inward breath flex characteristics for use in conveyor types.

[Conventional technology]

Belts with inward bend resistance properties are useful in a variety of instances where the belt must support some load carried thereon, such as, for example, conveyor belts. The invention is used in applications of the type where the belt has to support the load carried by it alone or where it is used as a second support device, where the first
The conveyor is the primary drive belt and supports the load, while the second belt is used to support the primary belt when the section between the drive pulley and the tension pulley is loaded. The latter type is described in a co-filed application under the title "Railway Vehicle Suspension System."
The suspension system is described in that application as follows. That is, the primary belt is the snowmobile's snow track, which is supported on the ground side by, and coupled to and driven by, a secondary belt located along the track and inside the track; represents resistance to bending to the ground, thus holding the track in its ground as it follows the terrain.

[Purpose of the invention]

The belt of the present invention is designed to operate alone or in combination with a primary conveyor belt, and the compressed portion of the belt is oriented outwardly relative to the pulley axis and its path of travel, as opposed to conventionally inwardly. It differs from other types of belts in this field by the fact that it is In this situation, the tensioning member is located close to the inwardly facing surface that contacts the pulley, and the compression section is essentially of non-compressible material, which is located close to the outwardly facing surface of the belt.

It is therefore a principal object of the present invention to provide a belt which is flexible as it passes around the pulleys and exhibits resistance to inward bending when stretched between the pulleys. The foregoing objects and other objects and advantages are achieved in an inwardly bendable belt comprising: That is, an endless flexible belt operating between at least two pulleys and having a molded resilient body and opposing inner and outer surfaces, the inner surfaces of which are oriented toward the pulley axis when the belt is in use. , the belt consists of a plurality of longitudinal high tensile strength cords embedded near its inner surface and a layer of substantially non-compressible material facing outwardly and forming the outer surface, the non-compressible The material shall be at least 50% of the total surface-to-surface thickness of said belt.
, which is resistant to inward bending relative to the belt when it is in a straight position between the pulleys.

〔Example〕

Features of the invention will become apparent from the detailed description given in conjunction with the accompanying drawings.

Referring now to FIG. 1, the primary conveyor is indicated at 22, and the system consists of drive pulleys 2
4, a tightening pulley 26, and a primary belt 28. A secondary conveyor 10a is mounted within the inner passage of the primary belt 28, the purpose of which is to support the primary belt 28 due to its inward bending properties. . The secondary conveyor 10a thus eliminates the need for idler rollers in its contribution to the primary belt 28, and maintains the belt 28 in the proper horizontal position when carrying the load indicated by the arrow 30 representing the direction of force. As mentioned above, the belt of the present invention has application in various types of conveyor equipment, and the support of snowmobile snow tracks is no exception. That is, the first
In the case of phantom line 10b in the figure, the secondary conveyor is positioned in the bottom inner passage of the conveyor (i.e., the snow track) and in a position that opposes the force acting on the track (primary belt) 28' in the direction of arrow 30'. to hold. In snow tracks, inward flex belts (secondary belts) 16' hold track 28' on the ground when track 28' conforms to the terrain. Applications of this type are fully described in the aforementioned co-pending applications.

Figures 2, 3, and 4 illustrate one embodiment of the present invention in which a substantially flat mated support belt (secondary belt) 70 and a conveyor belt (primary belt) 72 are drivingly connected. Support belt 70 features high tensile strength cords 74 located near the inner surface 76 of the belt.

The materials constituting the belt structure are also common in the art of belt forming and are not limited in any way by the types of materials used in the present invention. For example, the belt structure may consist of a cushion section having a plurality of cords 74 embedded therein, which cords may be multi-filament or single-filament cords of nylon, polyester, rayon, glass, steel or aramid or the like. . The cord 74 has a high tensile strength and is preferably located near the inner surface 76 of the belt. The tension cord 74
The upper layer is an elastomer comprising the cushion portion or has an abrasion resistant fabric or rectangular woven fabric 76 within a suitable elastomer and is made of high tensile strength cord 7.
The outer layer of 4 is made of a solid or fibrous material 75 that resists compression. In this situation, the portion designated 75 is substantially incompressible.

However, the support belt 70 is
2 is characterized by a notch or slot 78 shaped to receive the drive projection 80. The notch 78 increases the flexibility of the belt as it passes around the pulley, but when these two belts are assembled, the protrusion 8 of the conveyor belt 72
0 and especially the conveyor belt 7
The separation of the high tension cords of conveyor belt 2 and support conveyor belt 70 creates a very stiff cross-section that provides inward bending resistance for loads on the exterior surface of the conveyor belt system. The extremely stiff bond causes the two layers of high tensile strength cords 74 and 82 to extrude outwardly through an incompressible material having a thickness of at least 50% of the surface to surface thickness of the combined belt. It depends on what you are doing. In this way,
The distance between the high tension cord 74 of the support belt 70 and the high tension cord 82 of the conveyor belt 72 and the combined effect of the coupling of the drive protrusions and notches of these two belts make it resistant to inward bending. characteristics are achieved. . The support belt 70 is not very thick and the cutout 78 provides the necessary flexibility to go around the pulleys.

5 and 6 show a support belt 90 similar to the belt shown in FIG. This belt 90 achieves inward flex resistance in the same way as belt 70, and its flexibility is further increased by the two sets of notches. However, the support belt 90 still represents an extremely stiff part when mating with the drive protrusion 86 of the conveyor belt 88, and in this embodiment the width "W" of the belt accommodates a double notch and is connected to the conveyor belt 88. It becomes somewhat larger to increase the contact surface.

Also, the side cutout 84 is replaced with a central hole 84a (shown in dotted lines) that joins a row of drive protrusions 86 on the conveyor belt 88, thus achieving interconnection of the two belts, and It is also conceivable to achieve inward bending resistance in the same way as described above in connection with Figures 2 and 5.

The non-compressible elastic material is provided to provide flex resistance properties to support loads on the outer surface of the conveyor belt and to separate high tension cords embedded near the respective surfaces of the conveyor belt and support belt. ing. If the belt is a continuous thickness of incompressible elastic material, it is difficult, if not impossible, to go around the pulleys. In the usual prior art, a non-compressible elastic material is provided on the inner surface of the belt which requires wear resistance when contacting the pulley and is engaged with the drive pulley by a drive protrusion. .

〔Effect of the invention〕

Contrary to such conventional belts, the support belt device of the present invention has a layer of incompressible elastic material on the outer surface of the belt, a notch provided from the inner surface to the outer surface, and a conveyor belt. The unit's drive projections are joined together and separated by high-tensile cords embedded near the surface of each belt, providing flex resistance to support loads on the conveyor belt system. It has the effect of

Although certain representative embodiments and details have been shown for the purpose of illustrating the invention, it will be appreciated by those skilled in the art that various modifications may be made without departing from the spirit and scope of the invention. It should be obvious.

[Brief explanation of the drawing]

FIG. 1 shows an example consisting of a primary conveyor and a secondary conveyor working together to achieve inward flex resistance. FIG. 2 is a plan view from the inner surface of the support belt, which is one of the two belts that satisfies the conditions of the present invention, and is coupled with the drive protrusion of the conveyor belt in order to achieve inward bending resistance. A notch or slot located along one side of the cutout is shown. FIG. 3 is a front sectional view of the belt of FIG. 2, showing the joined portion of the support belt and conveyor belt. FIG. 4 shows a side view of the combination of the two shown in FIG. FIG. 5 is a plan view similar to FIG. 2, but showing an embodiment with drive projections and coupling notches along both sides of the belt. 6 is a front sectional view of the belt of FIG. 5. FIG. 10a, 10b...Secondary conveyor, 16,1
6'...Secondary conveyor belt (support belt), 2
2...Primary conveyor, 24...Drive pulley, 2
6...Tightening pulley, 28, 28'...Primary conveyor belt (conveyor belt), 30,3
0'... Arrow indicating force direction, 70... Support belt, 72... Conveyor belt, 74... High tensile strength cord, 75... Incompressible material, 76... Inner surface of support belt, 78... Notch part or slot, 8
0... Drive protrusion, 82... High tensile strength cord, 8
4, 84a... Notch, 86... Drive protrusion, 88
...Conveyor belt, 90...Support belt.

Claims (1)

[Scope of Claims] 1. At least one endless support belt device operably suspended between at least two pulleys and located between a drive pulley and a tensioning pulley of the conveyor; The belt conveyor is operable to
a plurality of high-tensile cords having an outer surface and an inner surface facing toward the axes of the driving and tensioning pulleys, and embedded in an elastic material proximate the outer surface and extending parallel to the longitudinal direction thereof; An endless belt arrangement having a plurality of drive protrusions depending from the inner surface over the entire length of the conveyor belt, said support belt arrangement having an outer surface and an inner surface facing towards its pulley axis; a number of high tensile strength cords embedded in the elastic material close to the inner surface and extending parallel to its longitudinal direction, facing outwardly and having a total thickness of at least 50 mm from the outer surface to the inner surface of said support belt;
%, the support belt device further comprises a plurality of cutouts passing through the support belt from an inner side toward an outer side, and the cutouts having a longitudinally arranged with projections of said conveyor belt, such support belt arrangement and conveyor belt arrangement running synchronously in interlocking relationship with each other, and a notch interlocked between said support belt arrangement and conveyor belt arrangement; An endless belt system, characterized in that the drive projections and the vertical separation of the high-tension cords each have inward bending characteristics to support loads applied against the outer surface of the conveyor belt system. 2. The endless belt device according to claim 1, wherein the protrusion of the conveyor belt and the notch of the support belt are arranged along at least one side edge of the support belt. 3. The endless belt device according to claim 1, wherein the protrusion of the conveyor belt and the notch of the support belt are arranged along both side edges of the support belt. 4. The endless belt device of claim 1, wherein the substantially incompressible elastic material of the support belt comprises an elastic mixture filled with dense fibers that resist compression.