GB2430918A

GB2430918A - Trailer for carrying a mechanical digger

Info

Publication number: GB2430918A
Application number: GB0702124A
Authority: GB
Inventors: Charles Greco; James Hopkins Clutterbuck
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-03
Filing date: 2007-02-05
Publication date: 2007-04-11
Anticipated expiration: 2027-02-05
Also published as: GB2430918A8; GB2430918B; GB0702124D0

Abstract

A flat bed trailer for transporting a mechanical digger 12 having a bucket 40 attached to a moveable arm 42 includes: a floor; a plurality of wheels 14 suitable for travel over roads; coupling means 22 for coupling the trailer to a towing vehicle; a plurality of restraining bars 32, 34 disposable substantially laterally across the trailer to restrain the mechanical digger 12 when positioned in the trailer; at least one bar retaining means 28 for releasably retaining at least one of the restraining bars 32, 34 in its restraining position: and a receptacle 38 disposed on the coupling means 22 for receiving and restraining the bucket 40 of the mechanical digger 12.

Description

FLAT BED TRAILERS

This invention relates to flat bed trailers for transporting heavy machinery.

It is well known to transport items of heavy machinery, such as mechanical diggers and forklift devices, to a site of use using a flat bed trailer.

Traditionally, the item of heavy machinery is positioned on the trailer and straps are used to secure it in place. Unfortunately, it is becoming increasingly apparent that the use of straps is less than desirable, since the item of heavy machinery is often not secured in place very effectively. Indeed, the present inventors are aware that at least one fatality caused by an item of heavy machinery that fell from a flat bed trailer during transportation.

The present invention, in at least some of its embodiments, overcomes the above described problem and provides cost effective, convenient means for securely restraining an item of heavy machinery during transportation.

According to a first aspect of the invention, there is provided a flat bed trailer for transporting a mechanical digger having a bucket attached to a moveable arm including: a floor; a plurality of wheels suitable for travel over roads; coupling means for coupling the trailer to a towing vehicle; a plurality of restraining bars disposable substantially laterally across the trailer to restrain an item of heavy machinery when positioned in the trailer; at least one bar retaining means for releasably retaining at least one of the restraining bars in its restraining position; and a receptacle disposed on the coupling means for receiving and restraining the bucket of the mechanical digger.

It is understood that flat bed trailers do not have high-sided walls, although it is possible for flat bed trailers to have low walls, typically extending less than one metre and commonly less than 50 cm above the level of the trailer floor.

Also, it is understood that the term bucket' relates to the scoop of a mechanical digger which is used for excavating purposes.

Preferably, the bar retaining means releasably retain all of the restraining bars in their restraining positions. However, it may be possible to employ a bar of permanently fixed position as one of the restraining bars.

Preferably, the flat bed trailer has a pair of spaced apart restraining bars.

The flat bed trailer may include a pair of spaced apart restraining bars, the bars being spaced so that in use one of the restraining bars restrains a front portion of the mechanical digger, and the other one of the pair of restraining bars restrains a rear portion of the mechanical digger. Typically, the pair of restraining bars are spaced by at least 750mm.

One or more of the restraining bars may be fully detachable from the trailer. In preferred embodiments, all of the restraining bars are fully detachable from the trailer.

One or more of the restraining bars may be permanently fixed to the trailer whilst being releasable from its restraining position. For example, a bar may be swingable, pivotable or otherwise moveable with respect to a permanent fixture so that the bar can be brought into or out of its restraining position.

The flat bed trailer may include one or more restraining bars which are fully detachable from the trailer and one or more restraining bars which are permanently fixed to the trailer whilst being releasable from its restraining position. In a preferred embodiment of this kind the flat bed trailer includes one restraining bar which is fully detachable from the trailer and one restraining bar which is permanently fixed to the trailer whilst being releasable from its restraining position.

Advantageously, the bar retaining means include a plurality of bar receiving elements, such as collars and jaws.

The flat bed trailer may include a pair of longitudinally extending side walls, and at least some of the bar retaining means may be disposed on the side walls. Typically, the side walls extend at least 300mm above the level of the trailer floor. The plurality of restraining bars may be disposable substantially laterally across the trailer from one side wall to the other side wall. The trailer may further include at least a pair of brackets, each located on a side wall, and at least some of the bar retaining means may be disposed on the brackets. In a preferred embodiment, each bracket is located on top of a side wall, and at least some of the bar retaining means are disposed on top of the brackets.

Preferably, the brackets are releasably coupled to the side walls, most preferably by bolts.

Preferably, the receptacle includes a frame. However, other receptacles, such as a box, might be envisaged. Preferably, the receptacle defines a substantially cuboid internal volume in which the bucket is received.

Advantageously, the bar retaining means includes at least one bar retaining member which is coupleable with a restraining bar and engageable with another part of the trailer, preferably the floor of the trailer. In one embodiment, bar receiving elements are employed, and the bar retaining member provides additional support for a bar.

Advantageously, the flat bed trailer further includes a plurality of tracks disposed substantially longitudinally on the floor of the trailer for restraining the item of machinery when disposed in the trailer. The tracks provide restraint against sideways motion of the item of heavy machinery and aid in locating the item in the trailer.

Preferably, the restraining bars are stepped. This increases the clearance of the bars, enabling better restraint to be provided, and provides a structure having greater strength than a linear bar.

According to a second aspect of the invention there is provided a kit of parts for retrofitting to a flat bed trailer including at least a pair of brackets, each for locating on a side wall of a flat bed trailer; means for coupling the brackets to the side walls; at least one bar retaining means disposed on the brackets; and a plurality of restraining bars at least one of which can be releasably retained in the bar retaining means so that the restraining bars are disposed substantially laterally with respect to the brackets when the brackets are arranged in parallel; and a receptacle for receiving and restraining the bucket of a mechanical digger.

It is highly advantageous that retrofits can be provided to existing flat bed trailers conveniently and cost effectively.

According to a third aspect of the invention there is provided a method of restraining a mechanical digger having a bucket attached to a moveable arm including the steps of: providing a flat bed trailer for transporting a mechanical digger including a floor; a plurality of wheels suitable for travel over roads; coupling means for coupling the trailer to a towing vehicle; a plurality of restraining bars; at least one bar retaining means; and a receptacle disposed on the coupling means; positioning the mechanical digger in the trailer; and restraining the mechanical digger by disposing the restraining bars substantially laterally across the trailer, at least one of the restraining bars being releasably retained in its restraining position by the bar retaining means, and positioning the bucket in the receptacle so that the receptacle restrains said bucket.

Whilst the invention has been described above, it extends to any inventive combination or sub-combination of the features set out above or in the

following description or drawings or claims.

Flat bed trailers in accordance with the invention will now be described with reference to the accompanying drawings, in which: Figure 1 is a perspective view of a flat bed trailer of the invention; Figure 2 shows (a) a side view and (b) a front view of a jaw; Figure 3 shows a side view of a collar; Figure 4 shows (a) a front view and (b) a plan view of a front-most restraining bar; Figure 5 shows a plan view of a pair of guide bars; Figure 6 is a photograph of the floor of a flat bed trailer; and Figure 7 is another perspective view of a flat bed trailer of the invention.

Figure 1 shows a flat bed trailer 10 of the invention having a mechanical digger 12 positioned thereon. The main body of the flat bed trailer 10 is of conventional design, having road-engaging wheels 14, and low, parallel sidewalls 16,18. The flat bed trailer 10 further comprises a releasable back wall permitting positioning of the mechanical digger 12 in the trailer 10, and a front coupling section 22 enabling the flat bed trailer 10 to be coupled to a suitable transportation vehicle such as a van or lorry. The flat bed trailer 10 further comprises a pair of brackets 24,26; the bracket 24 is mounted by way of bolts on to the top of the sidewall 16, and the bracket 26 is mounted by way of bolts on to the side wall 18. The bracket 24 has a pair of spaced apart jaws 28 upstanding therefrom, and the bracket 26 has a pair of spaced apart collars 30 upstanding therefrom. A pair of spaced apart bars 32,34 extend sideways across the flat bed trailer 10. One end of each bar 32,34 is located in a collar 30, and the other end of each bar 32,34 is located in a jaw 28, this positioning acting to secure the bars 32,34 in place. A securing pin 36 disposed near to the sidewall 16 further restrains the motion of the front-most bar 34. A further securing pin disposed near to the other sidewall 18 also performs this function.

The flat bed trailer 10 further comprises a receptacle 38 which is located on the front coupling section 22. The receptacle 38 receives the bucket 40 of the mechanical digger 12, the bucket being attached to a moveable arm 42. The receptacle 38 acts to restrain the bucket 40 during transportation of the digger 12.

Figures 2 to 4 show some of the features depicted in Figure 1 in more detail, and identical numerals are used to depict such shared features. Figure 2 shows a jaw 28 in more detail. The jaw 28 defines a rectangular groove 38 which is sized to receive a bar 32,34. The jaw 28 has an upright wall 28a having an aperture 28b formed therein which is sized to receive a locating member formed on a bar 32,34. The jaw 28 further comprises an upright flat 28c having an aperture 28d formed therein. The aperture 28d secures one end of a chain, and the other end of the chain (not shown) is connected to a lynch pin (not shown) which, in use, is positioned in a receiving aperture formed in the retaining member of the bar.

Figure 3 shows a collar 30 in more detail. It can be seen that the collar defines an aperture 30a which is sized to receive one end of a bar 32,34.

Figure 4 shows the front-most bar 34 in more detail. The bar 34 is stepped, having a dog leg arrangement which raises the height of the bar in its middle section. This increases the clearance of the bar in the region of contact or near- contact with the item of heavy machinery disposed in the trailer 10, and enables a better fit to the majority of heavy items commonly transported. Additionally, the stepped portion provides additional restraining surfaces 34a for preventing unwanted movement of the item of heavy machinery. The front-most bar 34 has a locating member 34b formed at one end thereof which in use is positioned in the aperture 28b of the respective jaw 28. The locating member 34b has a vertical bore 34c formed therein for receiving a lynch pin. The front-most bar 34 further comprises channels 34d, which may be in the form of external flutes, for receiving the securing pins 36.

Figure 5 shows a pair of guide bars 50 having a main elongate section 50a and a shorter elongate section 50b which is angled with respect to the main elongate section 50a. As shown in Figure 6, in use the guide bars 50 are disposed longitudinally on the floor 60 of the trailer 10, with the angled, shorter elongate sections 50b positioned adjacent the back wall of the trailer. The guide bars 50 provide restraint against sideways motion of the item of heavy machinery during transportation, and have an additional advantage in aiding the location of the item of heavy machinery in the trailer. Other items described in connection with Figure 1 can be seen in Figure 6, and identical numerals are used to denote such shared features.

Figure 7 shows the flat bed trailer 10 of Figure 1 in somewhat more detail.

Identical numerals are used to denote the features that are shared between Figures 1 and 7. It can be seen that the receptacle 38 is a framework arrangement comprising vertically, horizontally and diagonally disposed frame members. In an alternative embodiment, the front portion of the receptacle 38 does not include the uppermost horizontal frame member 44 shown in Figure 7.

Rather, the front portion of the receptacle includes a pair of diagonal frame members in the form of a downwardly facing chevron, in which the tip of the chevron defined by the meeting of the two diagonal frame members is in engagement with a lower horizontal frame member. Either embodiment is conveniently attached to a standard flat bed trailer by way of bolts 46.

Preferably, as shown in Figure 7, the framework is attached to the front coupling section 22 and the front 1 Oa of the main body of the flat bed trailer 10. Thus the floor of the receptacle 38 comprises frame members associated with the front coupling section 22, and the rear wall of the receptacle 38 comprises frame members associated with the front of the main body of the flat bed trailer 10.

Representative dimensions of the receptacle 38 are height 280mm, length 525mm and width 970mm. A representative sidewall height is 405mm.

In another embodiment, a flat bed trailer has a rear-most bar which is fully detachable and a front-most bar in the form of a permanently located "swing bar which can be swung into and out of its restraining position. A locating member such as a pin can be used to retain the front- most bar in its restraining position.

The rear-most bar can be positioned and held in its restraining position using suitable means, such as the jaws described with reference to Figures 1 to 4. It is envisaged that, in at least some applications, it may be possible to utilise a bar of permanently fixed position. For example, it may be possible for the front-most bar to be of permanently fixed position extending substantially laterally across the trailer, with the rear-most bar being moveable and positionable in bar retaining means.

An advantageous feature of the invention is that it is highly cost effective and convenient to retrofit the restraining bars and the means for retaining the restraining bars in place to an existing, conventional flat bed trailer. This can be done by bolting on or otherwise attaching a pair of brackets which carry means for receiving the bars to the sides of the flat bed trailer. Other ways of retrofitting and indeed other ways of securing the bars to the flat bed trailers would readily suggest themselves to one skilled in the art. However, it should be noted that dedicated trailers in accordance with the invention may be provided which are supplied with the bars and associated retaining means already fitted.

Claims

1. A flat bed trailer for transporting a mechanical digger having a bucket attached to a moveable arm including: a floor; a plurality of wheels suitable for travel over roads; coupling means for coupling the trailer to a towing vehicle; a plurality of restraining bars disposable substantially laterally across the trailer to restrain an item of heavy machinery when positioned in the trailer; at least one bar retaining means for releasably retaining at least one of the restraining bars in its restraining position; and a receptacle disposed on the coupling means for receiving and restraining the bucket of the mechanical digger.

2. A flat bed trailer according to claim 1 in which the bar retaining means releasably retain all of the restraining bars in their restraining positions.

3. A flat bed trailer according to Claim 1 or Claim 2 includes a pair of spaced apart restraining bars, the bars being spaced so that in use one of the pair of restraining bars restrains a front portion of the mechanical digger, and the other one of the pair of restraining bars restrains a rear portion of the mechanical digger.

4. A flat bed trailer according to Claim 3 in which the pair of restraining bars are spaced by at least 750mm.

5. A flat bed trailer according to any one of Claims 1 to 4 in which the bar retaining means include a plurality of bar receiving elements.

6. A flat bed trailer according to any one of Claims I to 5 including a pair of longitudinally extending side walls, in which at least some of the bar retaining means are disposed on the side walls.

7. A flat bed trailer according to Claim 6 in which the side walls extend at least 300mm above the level of the trailer floor.

8. A flat bed trailer according to Claim 6 or Claim 7 in which the plurality of restraining bars are disposable substantially laterally across the trailer from one side wall to the other side wall.

9. A flat bed trailer according to Claim 7 or Claim 8 including at least a pair of brackets, each located on a side wall, in which at least some of the bar retaining means are disposed on the brackets.

10. A flat bed trailer according to Claim 9 in which the brackets are releasably coupled to the side walls, preferably by bolts.

11. A flat bed trailer according to any preceding claim in which the receptacle includes a frame.

12. A flat bed trailer according to any preceding claim in which the receptacle defines a substantially cuboid internal volume in which the bucket is received.

13. A flat bed trailer according to any previous claim in which the bar retaining means includes at least one bar restraining member which is coupleable with a restraining bar and another part of the trailer, preferably the floor of the trailer.

14. A flat bed trailer according to any previous claim further including a plurality of tracks disposed substantially longitudinally on the floor of the trailer for restraining the item of machinery when disposed in the trailer.

15. A flat bed trailer according to any previous claim in which the restraining bars are stepped.

16. A kit for parts for retrofitting to a flat bed trailer including at least a pair of brackets, each for locating on a side wall of a flat bed trailer; means for coupling the brackets to the side walls; at least one bar retaining means disposed on the brackets; a plurality of restraining bars at least one of which can be releasably retained in the bar retaining means so that the restraining bars are disposed substantially laterally with respect to the brackets when the brackets are arranged in parallel; and a receptacle for receiving and restraining the bucket of a mechanical digger.

17. A method of restraining a mechanical digger having a bucket attached to a moveable arm including the steps of: providing a flat bed trailer for transporting a mechanical digger including a floor; a plurality of wheels suitable for travel over roads; coupling means for coupling the trailer to a towing vehicle; a plurality of restraining bars; at least one bar retaining means; and a receptacle disposed on the coupling means; positioning the mechanical digger in the trailer; restraining the mechanical digger by disposing the restraining bars substantially laterally across the trailer, at least one of the restraining bars being releasably retained in its restraining position by the bar retaining means, and positioning the bucket in the receptacle so that the receptacle restrains said bucket.

18. A flat bed trailer, kit of parts or method substantially as described herein with reference to the drawings.