GB2240750A

GB2240750A - Transporting and discharging materials

Info

Publication number: GB2240750A
Application number: GB9002420A
Authority: GB
Inventors: John Muirhead Druce
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-02-03
Filing date: 1990-02-03
Publication date: 1991-08-14
Also published as: GB9002420D0

Abstract

Apparatus for transporting and discharging materials comprises a skip (14), a frame structure (2) supporting the skip so that it projects over the end of the structure, and releasable retaining means (9) keeping the skip horizontal. The skip carries rollers or pins (10) guided by straps (12) (Fig. 1, not shown) so that when the skip is moved backwards it will tip about the bearing point. The frame structure may incorporate a storage area below the skip, in the form of a lockable drawer. <IMAGE>

Description

"MATERIAL TRANSPORTING APPARATUS INCLUDING A SELF-TIPPING SKIP" DESCRIPTION: The present invention relates to material transport rig apparatus including a self tipping skip It is the principal obiect of the present invention to proide self tipping skip apparatus which Is economic to manufacture but which is effective tn se.

According to the present invention material transporting apparatus includes a skip, a frame structure to support said skip such that the sip projects from an end of the frame structure, and releasable retainment means for retaining the skip in a horizontal load carrying position on the frame structure, the arrangement being such that when said retainment means are released the skip can be caused to tilt about a bearing point under gravity at said end of the frame structure to deposit a load carried in the skip. The bearing point being movable in a guide such that the skip moves both longitudinaly and rotationally.

Preferably the frame structure comprises a wheeled trailer.

Preferably auide mean are provided which co-orerate with runner mem@ers to limit the longitudinal movement of the skip, and preferably these runner members comprise p ins or rollers carried by the skip while the guide means are in the form of strips fixed to the frame structure.

Preferably holder means are provided to preclude tilting of the skip when the skip is being transported.

Preferably the frame structure incorporates a storage area below the si p. the storage area could be ri the form of a lockable drawer.

An @mbodiment of the present invention will now be described by may of example with reference to the accompanving drawings wherin: @ig. 1 shows a side elevation of a self tipping tra@ler according to the present invention, including a skip shown in the carrying position; Fig. 2 shows a similar view of the trailer of Fig. t but with the skip in the tilted position.

Fig. 3 shows an end view of the tra@ler looking in the direction of arrow A in Fig. 1.

Fi. 4 shows a similar view as that of Fig. 2 but for a modified self-tipping trailer.

Referring to Figs. i - 3 of the drawings, a self-tipping trailer 1 comprises a frame structure 2 carried by wheels 3, and a skip 4 supported by the frame structure 2. The frame structure 2 includes a chassis 2A at the forward end of which is mounted a tow hitch 5 for attaching the trailer to a towing vehicle. and a top frame XB carried b the chassis 2A to support the skip 4 clear of the wheels at a suitable elevation to adopt the discharging position shown in Fig. 2. The chassis 7y supports trailing arm suspension units 6 for the wheels 3. Posts 7 serve to resist forward motion of the skip 4.

The skip 3. and frame 2B are dimensioned such that the skip 3 projects in cantilever manner from the rear end of the frame 2B as shown in Fig 1.

The skip 4 in this example is symmetric about the transverse mid plane. The skip 4 includes pins or rollers 10 at the sips symmetry plane carried by lugs 11, these rollers 10 running on upper frame members 2C of the frame 27 and guide straps 12 fixed to the frame 2 serve for guiding of the rollers 10. The guide straps 12 permit the skip 4 to be moved back to substantially align the skips symmetry plane T-T with the rear edge 8 of the frame.The skip 4 additionally carries forwardly projecting holder plates 13. which, when the skip 4 is moved forwardly in the guide straps 12, engage under a transverse bar 14 (Fig 1) carried by lugs 15 on the frame 2 to arrest any tilting tendency of the skip 4 when the skip 4 is in the "transport" position shown in Fia.l. To retain the skip in the transport position, a retainment means 9 is attached to the front end of the skip 4 and these retainment means 9 can take the form of @hains cables or straps carrying hooks 9A for location in eves 16 suitabl@ positioned on the skip 4.The chain (or cable or straps ot the retainment means 9 are preferably coupled to over-centre toggle mechanisme 17 which facilitate placement of the chains or cables or straps) in a taut in-use condition.

In use, it is preferred that the skip 4 is loaded substantially unitormally mith material.

To tip the laud out of the skip 4. the retalnment means 9 are released and with the skip 4 moved rearwardly so that the holder plates 13 free from the bar 1@ the skip 4 will swing about the edge 8 in self-tipping manner to the full discharging position shown in Fig. (modest manual assistance would of course help the tilting act i or if necessary).The rearward movement and subsequent tilting of the skip 4 can be encouraged by effecting a backward motion to the trailer 1 and suddenly arresting this motion so that a suitable inertia etfect is created on the free skip 4 to encourage the above movements of the skip. In the skip discharging position the skip 4 can bear against the frame members 2B with one ene of the skip engaging the ground, and the arrangement (particularly the height of edge 8) is such that the skip 4 is angled at a angle of at least 45deg., to the around in the discharge position.

Thus, as will be evident, the present invention provides an effective self-tipping skip apparatus which is of relatively simple construction and consequently which is relativelv inexpensive to manufacture.

The invention can be applies to tra@lers with skips of varying load capacity e.g. 3 tonnes. Modifications are of course possible.

For examples the frame structure could take some other form than that shown. Fig. 4 shows a somewhat simpler arrangement where the rollers 10 and guide straps are omitted so that the skip 4 can be so readily achievable in this case and securement of the skip in the transport position may not be as effective as in the Figs. I - 3 embodiment.

Claims

CLCIIMS

1. Apparatus for transporting and discharging materials arid includes a skips a frame structure to support said skip such tat the skip projects from an end of the frame structures and releasable retainment means for retaining the skip in a horizontal load carrying position on the frame structures the arrangement being such that when said retainment means are released the skip can be caused to tilt about a bearing point under gravity at said end of the frame structure to deposit a load carried in the skip. The bearing point being movable in a guide such that the skip moves both longitudinaly and rotationally.

Apparatus as claimed in claim Ir wherein the frame structure comprises a wheeled trailer.

Apparatus as claimed in any preceeding claims wherein guide means are provide which co-operate with runner members to limit the longitudinal movement of the skip. ad these runner members comprise pins or rollers carried by the skip while the guide means are in the form of strips fixed to the frame structure 4. Apparatus as claimed in any preceeding claims wherin holder means are provided to preclude tilti af of the skip when the skip is beirici transported 5. Apparatus as claimed in any preceeding claim wherein the frame structure incorporates a storage area below the skip. The storage area could be in the form of a lockable drawer Apparatus for transporting and discharging materials, substantially as herein described with respect to the accompanying drawings.