WO2016192591A1

WO2016192591A1 - Method of stacking large cargos, transport frame and transport unit having same

Info

Publication number: WO2016192591A1
Application number: PCT/CN2016/083628
Authority: WO
Inventors: 李爱华; 董春健; 王峰; 吕国权
Original assignee: 南通中集特种运输设备制造有限公司; 中国国际海运集装箱(集团)股份有限公司; 中集集团集装箱控股有限公司
Priority date: 2015-05-29
Filing date: 2016-05-27
Publication date: 2016-12-08
Also published as: CN205931899U; CN106185067A

Abstract

A method of stacking large cargos on a transport device, transport frame and transport unit having the same. The method comprises: disposing a plurality of transport frames (10) on the transport device, wherein each of the transport frames comprises: an underframe (11) having two opposite lateral longitudinal columns (13) and two opposite lateral transversal columns (12), two end frames (18) respectively connected to two end portions of the underframe (11), and a positioning connecting piece (16) disposed on the underframe for fixing large cargos; placing the large cargos on the plurality of transport frames (10) at an angle with respect to the lateral longitudinal columns (13); fixing the large cargos to at least one positioning connecting piece (16) on the plurality of transport frames (10); and after the large cargos and the transport frames (10) are fixed, the transport frames (10) can satisfy the stacking requirement. The method achieves multilayer stacking, thus improving transport efficiency, and reducing transport costs.

Description

Method of stacking large cargo, transport frame and transport unit with same

Technical field

The present invention relates to the field of machinery, and in particular to a method of stacking large cargo, a transport frame, and a transport unit having the same.

Background technique

The current practice of transporting large cargo is usually to use bulk carriers to transport these large cargoes in bulk. However, the use of bulk cargo transportation requires the modification of the transport vessel for the shape and size of different cargoes, increasing the cost of retrofitting and transportation costs. Alternatively, another method is to add corner pieces to large cargoes in accordance with the requirements of ISO 668 to allow these large cargoes to be stacked in container space. However, for some large-sized goods, it is difficult to set the corner pieces conforming to the ISO 668 standard, so this solution is not necessarily feasible and will increase the cost of retrofitting the goods package.

The Chinese invention patent with the application number of “200810104249.1” introduces a transport framework for transporting large cargo and a method of stacking large cargo. The large cargo transport mentioned in this patent can only be applied to the deck of a container transport vessel. On the upper or bulk carrier, but for this kind of transportation method, it is impossible to stack the code above the cargo, and it is impossible to realize multi-layer stacking transportation, which greatly wastes the transportation space.

In addition, the transportation equipment in the above patent is provided with a plurality of container spaces for stacking standard containers, but if the bulk carrier is used for transportation, there is no standard container space, so it is difficult to realize large goods when transported by bulk carriers. transport.

Summary of the invention

A series of simplified forms of concepts are introduced in the Summary of the Invention section, which will be described in further detail in the Detailed Description section. The summary of the invention is not intended to limit the key features and essential technical features of the claimed invention, and is not intended to limit the scope of protection of the claimed embodiments.

In order to solve the above problems, the present invention discloses a method for stacking large goods on a transportation device, characterized in that the method comprises:

A plurality of transport frames are disposed on the transport device, each transport frame comprising:

a chassis having two opposite side rails and two opposite side rails;

Two end frames respectively connected to the two ends of the chassis, the end frames for supporting a transport frame, container or cargo stacked above the transport frame;

a positioning connector for fixing a large cargo, the positioning connector being disposed on the chassis;

Placing large cargo on a plurality of said transport frames at an angle to said side rails;

Securing the large cargo with at least one of the positioning connectors on the plurality of transport frames;

In the method, the transportation frame can meet the stacking requirement after the large cargo is fixed with the transportation frame.

Optionally, the method further includes: providing at least one pair of positioning connectors on at least one side rail of the transportation frame.

Optionally, at least one pair of intermediate beams for cooperating with the large cargo are provided between the two side members of the transport frame,

The method also includes providing at least one pair of positioning connectors on at least one pair of the intermediate beams.

Optionally, the method further includes: providing a corner piece or a connector with a corner hole at the top of the end frame.

Optionally, the transport device is stacked with a container, and the transport frame is stacked on top of the container.

Optionally, it also includes:

Providing a plurality of pairs of the positioning connectors along a length direction of the side rails on each of the transport frames;

A plurality of the large cargo are placed on a plurality of transport frames such that two of the large cargos adjacent in the width direction respectively mate with different pairs of the positioning connectors on the same transport frame.

Optionally, it also includes:

Configuring at least two rows of the transport frames;

The large cargo is placed such that it spans the at least two rows of transport frames in the width direction.

Optionally, it also includes:

Setting at least one transport frame;

At least one layer of transport frame, container or cargo is stacked on the at least one transport frame.

The invention also discloses a transport frame, the transport framework comprising:

a chassis having two opposite side rails and two opposite side rails;

Two end frames respectively connected to the two ends of the chassis, the end frame a transport frame, container or cargo for supporting stacking above the transport frame;

A positioning connector for securing a large cargo, the positioning connector being disposed on the chassis.

Optionally, at least one of the side rails is provided with at least one pair of positioning connectors.

Optionally, at least one pair of intermediate beams for cooperating with the large cargo are disposed between the two side members of the transport frame, and at least one pair of positioning connectors are disposed on the intermediate beam.

Optionally,

The large cargo is a railway vehicle;

The positioning connector is an iron shoe disposed on the chassis for fixing with the railway vehicle;

The railway vehicle is placed on the transport frame at an angle to the side rail and the railway vehicle is fixed to at least one of the iron shoes.

Optionally, the end frame is hinged to the chassis.

Optionally, a corner piece or a connector with a corner hole is provided at the top of the end frame.

Optionally, the end frame is fixedly connected to the chassis, detachably connected or foldably connected.

Optionally, the transport frame is provided with a fastener for fixing to a member below the transport frame.

Optionally, the 拴 firmware is a bottom corner piece disposed on the chassis or the end frame.

Optionally, the bottom corner piece is a corner piece conforming to the ISO standard.

Optionally, the positioning connector is a corner piece conforming to the ISO standard.

The invention also discloses a transport unit comprising at least two of the above transport frames.

Optionally, the at least two transport frames are arranged in at least one row and stacked in at least one layer.

According to the method of the present invention, multi-layer stacking can be realized, transportation efficiency is improved, and transportation cost is reduced. Large cargo can be transported on transport units such as bulk carriers that do not have standard container space.

DRAWINGS

The following figures of the embodiments of the invention are used herein to understand the invention as part of the invention. The embodiments of the invention and the description thereof are shown in the drawings In the drawing,

1 is a front elevational view of a transport frame in accordance with an embodiment of the present invention;

2 is a top plan view of a transport frame in accordance with an embodiment of the present invention;

Figure 3 is an end elevational view of a transport frame in accordance with an embodiment of the present invention;

Figure 4 illustrates the case of a transport frame stacking in accordance with an embodiment of the present invention;

Figure 5 is a plan view of Figure 4;

Figure 6 illustrates a situation in which a transport frame is stacked on a container in accordance with an embodiment of the present invention;

Figure 7 is a plan view of Figure 6;

Figure 8 is a side elevational view of a transport frame stacking on a container in accordance with an embodiment of the present invention, wherein the transport frame is stacked with a container;

9 is a top plan view of a transport container stacking large cargo of different shapes in accordance with an embodiment of the present invention;

Figure 10 is a side elevational view of a transport frame for transporting a railway vehicle in accordance with another embodiment of the present invention;

Figure 11 is a side elevational view of the transport frame of Figure 10 carrying a railway vehicle;

Figure 12 is an end elevational view of the transport frame of Figure 11;

Description of the reference signs:

10. Transportation framework 10’, transportation framework

11, the chassis 12, side beams

13, side rails 14, bottom corner pieces

15, the middle beam 16, positioning connector

17, top corner pieces 18, end frame

19, iron shoes 20', container

20a, 20b, 20c, 20d, 20e, 20f, 20g: container

30, large cargo 30', large cargo

40. Railway vehicles

detailed description

In the following description, numerous specific details are set forth in the However, it will be apparent to those skilled in the art that the embodiments of the invention may be practiced without one or more of these details. In other instances, some of the technical features well known in the art have not been described in order to avoid obscuring the embodiments of the present invention.

In order to thoroughly understand the embodiments of the present invention, detailed structures will be set forth in the following description. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but the present invention may have other embodiments in addition to the detailed description.

The invention discloses a method for stacking large goods on a transport device, which comprises:

A plurality of transport frames are provided on the transport device, each transport frame comprising: a chassis, two end frames, and a positioning connector for securing large cargo. The chassis has two opposing side rails and two opposing side rails. The two end frames are respectively connected to the two ends of the chassis, and the end frames are used to support the transport frame, container or cargo stacked above the transport frame. The positioning connector is placed on the chassis.

Placing large cargo on multiple transport frames at an angle to the side members;

Securing the large cargo with at least one positioning connector on the plurality of transport frames;

In the above method, after the large cargo and transportation frame is fixed, the transportation framework can meet the stacking requirements.

As shown in FIGS. 1 to 3, the transport frame 10 of the present invention has a chassis 11 including two side cross members 12 disposed opposite each other and two side rails 13 disposed opposite each other. Preferably, the width DW and length DL of the chassis 11 are set to correspond to the width and length of the container (the container may be, for example, a 20' or 40' standard container, or a special container, a platform box, etc.), such as the chassis 11 The width DW can be 2438 mm, which is the width of a 20' standard container. The transport frame 10 can be of ISO size as needed to facilitate backhaul transport. Of course, the size of the transport frame 10 can also be slightly smaller than the ISO container size, so that it can meet the needs of transporting large cargo, and the transport frame 10 can be returned as a cargo in the container.

In order to enable the transport frame to be securely fastened to components below the transport frame, such as the underlying transport frame, container or transport unit, the transport frame is also provided with tampering.

Preferably, the tamper is a bottom corner piece 14 disposed on the chassis 11. Specifically, the corners of the bottom of the chassis 11 are respectively provided with a corner piece 14 for cooperating with the top corner piece of the container, the lower transport frame 10 or the transport unit to fix the transport frame 10.

For example, the transport frame 10 can be placed on top of the stacked container 20 and connected to the top corner of the container 20 by the corner piece 14 to secure the transport frame 10. This increases the way and flexibility of stacking and does not waste space.

Further, the corner piece 14 is a corner piece conforming to the ISO standard. Specifically, the center distance between the two corner pieces 14 at both ends of the side cross member 12 is set to correspond to the center distance of the corner piece in the width direction of the standard container; and the two corner pieces located at both ends of the side stringer 13 The center distance between the 14 is set to correspond to the center distance of the corner pieces in the length direction of the standard container.

Two end frames 18 are respectively connected to the two ends of the chassis 11, and the end frame 18 can be disposed at or near the end of the chassis 11. The end frame 18 can be perpendicular to the chassis 11 for supporting the transport frame 10, the container 20 or the cargo on top of the transport frame 10 in a vertical direction. It should be noted that the "goods" on which the end frame 18 is supported may also be a large cargo. In the present description, for the sake of distinction, the "large cargo" is specifically referred to as the cargo carried on the chassis of the transport frame 10.

Alternatively, the end frame 18 can be fixedly coupled to the chassis 11 , detachably connected or foldably connected. That is, the end frame 18 can be detached from the chassis 11 or folded into a substantially horizontal position with the chassis 11, thereby saving space in the vertical direction, which facilitates stacking of the plurality of transport frames 10 that do not carry the cargo itself. transport. It is conceivable that the detached or folded end frame 18 can reduce the height of the transport frame 10 such that when the transport frame 10 is returned as a cargo in the container as described above, multiple transport frame stacks can be realized Let it save space.

Preferably, a top corner piece 17 or a connector with a corner piece hole is provided at each end of the top of the two end frames 18 for connection with an upper layer member such as the upper transport frame 10 or the container. Taking the corner piece 17 as an example, the four corner pieces 17 are aligned with the four corner pieces 14 in the vertical direction as shown in FIG. In this way, the plurality of transport frames 10 can be stacked with each other by the cooperation of the top corner members 17 and the bottom corner members 14, so that at least one transport frame 10 can be stacked on the first transport frame 10, which greatly saves the stacking code. Space, improved stacking efficiency.

In the illustrated embodiment, at least one pair of positioning connectors 16, such as positioning attachment holes, may be provided on at least one side rail 13, each pair of positioning links 16 being disposed along the length of the side rails 13. For example, two pairs of positioning links 16 can be provided on one side rail 13 of the transport frame, while a pair of positioning links 16 are provided on the other side rails 13.

Referring to Figure 2, between the two side rails 13, at least one pair of intermediate beams 15 for mating with large cargo are provided. The pair of intermediate beams are parallel to each other and are spaced apart by a first predetermined distance D1 that is adapted to the width of the large cargo to be stacked. At least one pair of positioning connectors 16 for stacking and securing large cargo is provided at the top of each pair of intermediate beams 15. Therein, the positioning connectors 16 on one intermediate beam are aligned with the positioning connectors 16 on the other of the same pair of intermediate beams, i.e. such that each pair of positioning connectors 16 are disposed along the length of the side members 13. Here, the positioning connector 16 may be a corner piece conforming to the ISO standard, and of course may be provided in other configurations.

It is obvious that in order to improve the strength and load carrying capacity of the transport chassis 11, the cross-sections of the side cross member 12, the side rails 13 and/or the intermediate cross member 15 can be arranged in an I-shaped, 匚-shaped, H-shaped or C-shaped manner. .

According to the invention, the number of intermediate beams 15 and the positioning connectors 16 on each intermediate beam The number can be appropriately determined according to the shape and size of the large cargo to be stacked. Figure 2 shows an example of a transport frame provided with two pairs of intermediate beams 15, wherein each intermediate cross member 15 is provided with six positioning links 16. The adjacent two pairs of intermediate beams 15 are spaced apart by a second predetermined distance D2 which can be appropriately determined according to the spacing between adjacent large goods to be stacked and the width of each large cargo.

According to the transport frame of the present invention, the two end frames are respectively connected to the two ends of the chassis, and a container or another transport frame can be stacked above the end frame, thereby realizing multi-layer stacking, improving transportation efficiency, and reducing transportation cost. . The transport frame of the present invention enables the transport of large cargo on transport units such as bulk carriers that do not have standard container space.

Figures 4 and 5 illustrate the stacking of four transport frames 10, in the illustrated embodiment, including two lower transport frames 10 and two upper transport frames 10'. The two lower transport frames 10 and the two upper transport frames 10' are arranged in two and two rows.

Each upper transport frame 10' may be stacked on top of another lower transport frame 10, and the bottom corner piece 14' of the upper transport frame 10' and the lower transport frame may be attached using a connection structure such as a conventional corner piece connector or the like. The top corner pieces 17 of 10 are joined together so that the fixed upper transport frame 10' is fixed to the lower transport frame 10.

Figure 5 (top view of Figure 4) shows an example of stacking large cargo using the transport frame 10 of the present invention. Referring to Fig. 5, in the illustrated embodiment, the upper layer transport frame 10' is taken as an example of the transport frame 10. Two large cargo 30' are placed on two side-by-side (upper) transport frames 10' such that the large cargo 30' is angled (eg, perpendicular) to the longitudinal beams 13 of the upper transport frame 10' in its length direction. The method is stacked on the upper transport frame 10'. Since the large cargo 30' has a relatively long length, it will span the two upper transport frames 10', and of course it may span a plurality of upper transport frames 10'. Similarly, the corner pieces of the bottom of the large cargo 30' can be fixed with the corresponding positioning connectors 16 on the corresponding upper transport frame 10' by means of a joint such as a twist lock or a (semi) automatic lock, thereby squeezing large cargo 30' is fixed to the corresponding upper transport frame 10'. Moreover, after the large cargo 30' is fixed to the corresponding upper transport frame 10', the transport frame 10' can also meet the stacking requirement, that is, stack at least one transport frame and container above the transport frame 10'. Or goods.

As shown in Figure 6, seven standard containers 20a-20g are stacked in a row at the bottom. Two

standard containers

20a and 20g at both ends are stacked with other standard containers. The five standard containers located in the middle are provided with a plurality of transport frames 10 according to the invention, wherein each transport frame 10 is placed on top of a corresponding one of the standard containers.

In the illustrated embodiment, a transport frame 10 is placed on the

standard containers

20b and 20f, two A large cargo 30 is stacked between the transport frames 10. No transport frames are placed on the

standard containers

20c, 20d and 20e. Of course, depending on the size and weight of the cargo to be carried, it is also possible to place a transport frame on adjacent standard containers; or, to allow more standard containers to be placed between standard containers with adjacent transport frames. .

As described above, since the transport frame 10 of the present invention has the end frame 18, the plurality of transport frames 10 can be stacked one on top of the other. Thus, with continued reference to Figure 6, above each of the two transport frames 10 of the lower deck, there are also two transport frames 10', respectively, which carry the upper cargo 30'. In this way, space can be utilized more fully.

Of course, it is conceivable that at least one transport frame 10, large cargo 30 or container 20 may be stacked on at least one row of transport frames 10 when a plurality of transport frames 10 are present.

Turning now to Figure 8, in the embodiment illustrated in Figure 8, the upper transport frame 10' is also loaded with a standard container 20', similarly, the top corner member 17 of the end frame 18 of the upper transport frame 10' It can be connected to the bottom corner piece of the standard container 20'. Of course, in another alternative embodiment, the end frame 18 of the upper transport frame 10' can also carry the transport frame 10 again.

A plurality of pairs of intermediate beams may be disposed on the transport frame 10 for respectively stacking a plurality of large cargoes. Preferably, the intermediate beams on the plurality of transport frames in a row of transport frames are aligned with one another. In the example shown in Fig. 7, each transport frame 10 is provided with two pairs of intermediate beams, a pair of intermediate beams 15a of each transport frame being aligned with each other while the other pair of intermediate beams 15b are also aligned with each other. Two large pieces of cargo 30a and 30b are stacked on the

intermediate beams

15a and 15b of each transport frame. The second predetermined distance D2 between the two pairs of intermediate beams is adapted to the respective widths of the large cargoes 30a and 30b and the spacing DG between the two large cargoes. Of course, the second predetermined distance D2 can also be appropriately reduced to stack more goods and improve space utilization.

It should be noted that the transport frames according to different embodiments of the present invention can be combined with each other to form a transport unit, so that large cargoes having different outer dimensions and shapes can be stacked on the same transport unit, thereby improving space utilization. Fig. 9 shows an example in which three transport frames 10 are combined with each other to stack large goods 30a and 30b.

For large cargo sizes that are oversized, two or more transport frames 10 can be placed as shown in Figure 9, and the large cargo spans multiple rows of transport frames in its width direction. Large cargo 30a is placed on these transport frames 10 and spans two rows of transport frames 10 in the width direction thereof. After the cargo 30a is placed, the remaining intermediate beams of the second row of transport frames 10 can be used to continue stacking other goods, for example, the L-shaped large cargo 30b is placed in cooperation with the transport frames of the first and third rows, thereby enabling Make full use of the heap space.

Referring to Figures 10 through 12, a transport frame 10 for a railway vehicle is illustrated. Implemented in the illustration In the mode, the large cargo is a railway vehicle 40. The positioning connector is an iron shoe member 19 provided on the chassis 11, and the iron shoe member 19 is for fixing to the railway vehicle 40. In particular, the iron shoe 19 can be fixed to the wheels of the railway vehicle 40.

The railway vehicle 40 can be placed on the transport frame 10 at an angle to the side rails 13, and the railway vehicle is secured to the at least one iron shoe. As shown in FIG. 11, the railway vehicle 40 can be placed on the transport frame 10 in a manner perpendicular to the side rails 13. However, in an embodiment not shown, it is conceivable that the railway vehicle can be placed on the transport frame 10 at an angle (such as an acute angle) to the side rails 13 due to the length of certain rail vehicles. It is convenient for loading and unloading railway vehicles, and the number of transportation frames 10 occupied by railway vehicles can be less.

In particular, the end frame of the transport frame 10 can be hinged to the chassis 11.

Further, as described above, the corner frame or other fixing members may be provided on the transport frame 10 for the railway vehicle so as to be fixed to the hull or the like. Moreover, at least one layer of goods, containers or transportation frames can be stacked on the upper side of the transportation frame 10, thereby realizing multi-layer stacking of railway vehicles and improving transportation efficiency.

In addition, the outer dimensions of the transport frame 10 may be smaller than the size of the ISO standard container, such that multiple transport frames may be stacked and placed in a standard container for backhaul transport.

The above illustrates an example of further stacking large cargo on a stacked standard container using the transport frame of the present invention. However, it should be clear that in the present invention, it is also possible to use a transport frame to directly stack large cargo onto a transport unit (e.g., a container ship). There is no need to stack standard containers. In a manner similar to that described in the previous examples, the transport frame 10 can be directly stacked to a corresponding location, which in turn stacks large cargo.

Furthermore, the present invention also discloses a transport unit comprising at least two of the above transport frames. Further, the at least two transport frames are arranged in at least one row and stacked in at least one layer.

The present invention has been described by the above-described embodiments, but it should be understood that the above-described embodiments are only for the purpose of illustration and description. Further, those skilled in the art can understand that the present invention is not limited to the above embodiments, and various modifications and changes can be made according to the teachings of the present invention. These modifications and modifications are all claimed in the present invention. Within the scope.

Claims

A method of stacking large cargo on a transport device, the method comprising:

A plurality of transport frames are disposed on the transport device, each transport frame comprising:

a chassis having two opposite side rails and two opposite side rails;

Two end frames respectively connected to the two ends of the chassis, the end frames for supporting a transport frame, container or cargo stacked above the transport frame;

a positioning connector for fixing a large cargo, the positioning connector being disposed on the chassis;

Placing large cargo on a plurality of said transport frames at an angle to said side rails;

Securing the large cargo with at least one of the positioning connectors on the plurality of transport frames;

In the method, the transportation frame can meet the stacking requirement after the large cargo is fixed with the transportation frame.
The method of claim 1 further comprising: providing at least one pair of positioning connectors on at least one side rail of the transport frame.
The method according to claim 1 or 2, wherein at least one pair of intermediate beams for cooperating with said large cargo are provided between the two side members of said transport frame,

The method also includes providing at least one pair of positioning connectors on at least one pair of the intermediate beams.
The method of claim 1 further comprising: providing a corner piece or a connector with a corner hole at the top of the end frame.
The method of claim 1 wherein said transport equipment is stacked with a container and said transport frame is stacked on top of said container.
The method of claim 1 further comprising:

Providing a plurality of pairs of the positioning connectors along a length direction of the side rails on each of the transport frames;

A plurality of the large cargo are placed on a plurality of transport frames such that two of the large cargos adjacent in the width direction respectively mate with different pairs of the positioning connectors on the same transport frame.
The method of claim 1 further comprising:

Configuring at least two rows of the transport frames;

The large cargo is placed such that it spans the at least two rows of transport frames in the width direction.
The method of claim 1 further comprising:

Setting at least one transport frame;

At least one layer of transport frame, container or cargo is stacked on the at least one transport frame.
A transport frame, characterized in that the transport frame comprises:

a chassis having two opposite side rails and two opposite side rails;

Two end frames respectively connected to the two ends of the chassis, the end frames for supporting a transport frame, container or cargo stacked above the transport frame;

A positioning connector for securing a large cargo, the positioning connector being disposed on the chassis.
The transport frame of claim 9 wherein at least one of said side rails is provided with at least one pair of positioning links.
A transport frame according to claim 9 or 10, wherein at least one pair of intermediate beams for cooperating with the large cargo are disposed between the two side members of the transport frame, At least one pair of positioning connectors are disposed thereon.
The transport frame according to claim 9, wherein

The large cargo is a railway vehicle;

The positioning connector is an iron shoe disposed on the chassis for fixing with the railway vehicle;

The railway vehicle is placed on the transport frame at an angle to the side rail and the railway vehicle is fixed to at least one of the iron shoes.
The transport frame of claim 12 wherein said end frame is hinged to said chassis.
A transport frame according to claim 9 or 12, characterized in that the top of the end frame is provided with a corner piece or a connector with a corner hole.
A transport frame according to claim 9 or 12, wherein the end frame is fixedly connected to the base frame, detachably connected or foldably connected.
A transport frame according to claim 9 or 12, wherein the transport frame is provided with a tamper for fixing to a member below the transport frame.
The transport frame of claim 16 wherein said tamper is a bottom corner member disposed on said chassis or said end frame.
The transport frame according to claim 17, wherein said corner piece is a corner piece conforming to the ISO standard.
The transport frame of claim 9 wherein said positioning connector It is a corner piece that conforms to the ISO standard.
A transport unit comprising at least two transport frames according to any one of claims 9 to 19.
The transport unit of claim 20 wherein said at least two transport frames are arranged in at least one row and stacked in at least one layer.