FR2585007A1 - BELT CONVEYOR COMPRISING SHAPE HOLDING MEANS - Google Patents

Abstract

A BELT CONVEYOR IS SUPPORTED BY SUPPORTED FRAMES 1. A FORWARD 2A AND A RETURN 2B ARE SUPPORTED BY A MULTIPLICITY OF HOLDING ROLLERS 3, 4 MOUNTED IN EACH SUPPORT FRAME. AN INTERMEDIATE ROLLER 5 WHICH IS MOUNTED HORIZONTALLY AS A SHIFT ROLL, IS IN BOTH CONTACT WITH THE FORWARD STRAND AND THE RETURN STRAND AND SUPPORTS BOTH TO SIMPLIFY THE CONSTRUCTION OF THE BELT CONVEYOR.

Description

Transportt>. belt.

  The present invention relates to a belt conveyor and in particular a tubular belt conveyor in which a flat band is wound on itself to transport

materials without projections.

  As shown schematically in Figures 5 and 6, an endless rubber strip 13 passes around rollers 11 and 12 located at its respective front and rear ends and flows between these rollers. A strand advancing 13a at the upper part of the strip 13, is wound on itself by a multiplicity of shape retaining rollers 15 mounted in a support frame 14 in order to obtain a tubular shape. There is generally known a conveyor with tubular belt for transporting materials which are projected from a hopper

  16 located in the vicinity of the rear roller 12.

  In such a tubular belt conveyor, the return strand 13b of the lower part is also wound on itself downwards by a multiplicity of form-keeping rollers 18. Consequently, the height of the support frame 14 and of this makes the height of the device itself increase so that the number of shape holding rollers 15 and 18 also increases. As a result, this device has disadvantages

  in terms of volume and cost.

  It is therefore an object of the present invention to provide a conveyor belt which is simpler and less expensive to produce. According to the present invention, this object is achieved by a conveyor belt comprising an endless belt passing around two rollers and circulating between them, the belt comprising an advancing strand and a return strand, support frames each of which comprises a multiplicity of form-keeping rollers in its upper part and in its lower part so as to support the

  advancing strand and return strand, and inter-rollers

  mediaries each of which is mounted horizontally between the upper part and the lower part of each support frame to support the advancing strand and the strand

back.

  In the prior art, as mentioned above, the advancing strand 13a and the return strand 13b are supported by a different group of shape-holding rollers, respectively 15 and 18, and therefore the height of the frame support 14 increases. According to the present invention, an intermediate roller is in contact with the lower surface of the advancing strand and with the upper surface of the return strand to support the two strands. As a result, the height of the support frame decreases and we can save on the number

form-keeping rollers.

  The invention will be better understood on reading the description.

  tion, given below by way of example only, of several preferred embodiments, in conjunction with the accompanying drawing, in which: - Figure 1 is a longitudinal sectional view taken in a plane perpendicular to the direction of movement of a first embodiment of a tubular belt conveyor according to the present invention, this view being intended to show the location of a support frame and shape holding rollers in this frame; - Figure 2 is a front view in which the intermediate roller shown in Figure 1 is simultaneously in contact with the advancing strand and with the return strand of the endless tubular conveyor; - Figures 3 and 4 are similar to Figure 1 and show other embodiments of the present invention; Figure 5 is a schematic front view showing a conventional tubular belt conveyor; and - Figure 6 is a longitudinal sectional view at large

  scale taken along line VI-VI of Figure 5.

  Figure 1 is similar to Figure 6 and shows a

  first embodiment of the present invention. A transport

  tubular belt is similar to the conveyor

with conventional tubular band.

  In the first embodiment, an advancing strand 2a is supported at its upper surface and at its right and left sides by three form-retaining rollers 3, and a return strand 2b is supported at its lower surface and its right and left sides by three form-holding rollers 4. The advancing strand

  2a and the return strand 2b are also supported respec-

  at the level of the lower surface and the

  upper surface by a horizontal intermediate roller 5.

  As shown schematically in Figure 2, the advancing strands 2a and back 2b flow in opposite directions, and therefore there is no problem with the intermediate roller 5 which can not rotate

that in a way.

  The present invention can be applied to an apparatus with five or more shape retention rollers to support each strand. Figure 3 shows five rolls and Figure 4 shows six rolls. In each case, the advancing strand 2a and the return strand 2b are simultaneously supported

  by a horizontal intermediate roller 6 or 7.

  It goes without saying that the present invention can be applied not only to a conveyor belt having a closed tubular shape, but also to a shaped belt.

U which opens at one end.

  Although the invention has been particularly shown and described with reference to preferred embodiments thereof, it is understood that modifications can be made in form and in details without

  deviate from the spirit and scope of the invention.

Claims (6)

Claims.   1. Belt conveyor comprising an endless belt passing around two rollers (11, 12) and circulating between them, the belt comprising an advancing strand (2a) and a return strand (2b), and support frames (1) each of which comprises a multiplicity of shape-holding rollers (3, 4) at its upper part and at its lower part to support the advancing strand and the return strand, characterized in that it comprises intermediate rollers (5, 6 , 7), each of which is mounted horizontally between the upper part and the lower part of each support frame to support both the advancing strand and the strand back.   2. Belt conveyor according to claim 1, characterized   in that the strip has a tubular shape.   3. Belt conveyor according to claim 1, characterized in that the belt has a U-shape which opens at one end. 4. Belt conveyor according to claim 2, characterized in that the number of shape holding rollers is four.   5. Belt conveyor according to claim 2, characterized in that the number of shape-keeping rollers is five.   6. Belt conveyor according to claim 2, characterized in that the number of shape-keeping rollers is six.