LAGGING-REINFORCED STRUCTURE

Abstract: The present invention discloses a lagging-reinforced structure which comprises a substrate (5), a lining layer (6) of a flexible and resilient material coated on the upper surface of the substrate (5) a plurality of laggings (L) embedded in the lining, the laggings having an anchoring portion at the embedded end thereof, and the laggings made of a material of high hardness and high wear resistance. Due to such construction, the peeling-off of the lagging from the lining layer can be effectively prevented.

Description: This invention relates to a lagging-reinforced conveyor belt of the kind defined by the precharacterizing features of the claim. A lagging-reinforced conveyor belt of this type is known from DE-A-2 930 186. The plate-shaped lagging elements of this known conveyor belt are arranged in series both longitudinally and transversely along the lining layer of the belt with gaps between adjacent lagging elements so as to present a tiled upper surface which provides a certain flexibility of the conveyor belt. These plate-shaped lagging elements, however, are not sufficiently anchored within the lining layer and therefore tend to be easily torn from the surface thereof. From JP-A-60 213 604 it is known to provide each of the lagging elements of a lagging-reinforced conveyor belt, which lagging elements are embedded in a rubber-made lining layer mounted on a substrate, with a profiled anchoring portion extending from the lower surface of the lagging elements into the material of the lining layer. The profiles used, however, are not in any event, for instance in the case of extreme loads acting on the lagging elements, suited to prevent the tearing of individual plate-like lagging elements from the surface of the lining layer. It is the object of the present invention to provide a lagging-reinforced conveyor belt of the kind defined by the preamble of the claim having a high resistance to the tearing out of individual lagging elements. This object is achieved by the characterizing features of the claim. In accordance with the invention a tubular securing element is provided for each lagging element which securing element is optimized for the purpose of high resistance to tearing of indiviudual lagging elements. Fig. 1 is a partial plan view of the lagging-reinforced conveyor belt according to the invention, Fig. 2 is a cross-sectional view of the lagging-reinforced conveyor belt taken along the line V-V of Fig. 1, and Fig. 3 and Fig. 4 are plan and side view of the lagging-reinforced title-like lagging. conveyor belt of Fig. 1. The conveyor belt partially shown in Fig. 1 to 4 comprises a substrate 5 which is made of a textile having high tensile strength and flexibility such as textile or glass fiber textile or carbon fiber textile. Furthermore, such substrate 5 can be made of a plurality of cords extending in the same direction as the running direction of the conveyor belt 1 and fixedly secured to each other in a transverse direction. Such cord may be a fiber strip such as nylon or steel strip having a sufficient flexibility and tensile strength. The upper surface of the substrate 5 is coated with a flat-plate-shaped lining layer 6 and such lining layer 6 is made of rubber which is flexible and resilient. The lining layer 6 is moulded to the substrate 5. The laggings L embedded in said layer 6 are made of extremely high wear-resistance ceramics. Such ceramic laggings L are produced, for example, in such a manner that 80 to 90 % by weight of alumina powder having a particle size of less than 10 µm is mixed with 20 to 10 % by weight of a bonding agent mainly composed of silica powder to provide a raw material mixture and such mixture is compacted in an elongated-bar-like shape and the compact is sintered under conventional sintering conditions. Fig. 1 shows the laggings L embedded into the lining 6 of the conveyor belt 1. As shown in Fig. 2 to Fig 4, the lagging L comprises a flat square plate 40 and a hollow circular anchoring portion 41 which is fixedly secured to the lower surface of the lining layer 6. Since the anchoring portion 41 has a hollow space 42 therein where the lining material intrudes during the lining forming process, the peeling of the tile-like laggings L can be effectively prevented. Since such tile-like laggings L can form gaps 7 not only in a longitudinal direction but also in a lateral direction, the flexibility of the lagging L relative to the lining layer 5 is enhanced so that the lagging L is not ruptured even when an unexpected load is applied to the laggings L.

Claims: A lagging-reinforced conveyor belt comprising a rubber lining layer (6) and a plurality of ceramic lagging elements (L) embedded in said lining layer (6), each of said lagging elements (L) comprising a flat square plate (46), said lagging elements (L) being arranged transversely and longitudinally in the lining layer (6) with a gap between each two adjacent lagging elements (L), characterized in that each lagging element (L) further comprises a hollow, tubular, anchoring portion (42) extending horizontally along and from the lower face of the lagging element, the said anchoring portion being fixedly and integrally secured in the said lining layer (6) so as to be totally embedded in said lining layer (6), said lining layer (6) being moulded on to a substrate (5) made of textiles or cords.

Inventors: KAWAMOTO, MASAICHI
Applicants: KAWAMOTO, MASAICHI
Application year: 1986
Main classification: B65G15
IPC codes: B65G15, B65G39, B65D90