TWM551640U - Modular bleachers - Google Patents

Description

Combined ladder stand

This creation is about a grandstand, especially a modular grandstand that can be built temporarily and can be expanded indefinitely.

Stands can be divided into long-term use and temporary use according to their use. Stands that are used for a long time are fixed, and stands that are used temporarily are usually combined.

The conventional combined step platform includes a support frame, a plurality of steps, a plurality of seats, and a plurality of fences. The support frame body comprises a plurality of vertical rod bodies and a plurality of connecting rods, wherein the steps comprise a plurality of vertical plates and a plurality of horizontal plates, and the vertical plates and the horizontal plates are laid one by one on the vertical body of the support frame And the connecting rod, to assemble the main body of the stepped stand. The seat is arranged on the vertical plate body, and the fence is arranged at the two ends of the horizontal plate body.

However, the vertical plate body and the horizontal plate body are laid one by one on the vertical rod body and the connecting rod of the support frame body, and there are several problems as follows:

1. Assembly and disassembly take time and effort.

Second, the expansion of extension and poor combination.

Third, more vertical rods and connecting rods are needed to improve the difficulty of erection and the cost of erection.

Moreover, the seat of the conventional combined ladder stand is fixed on the vertical plate body, and cannot be arbitrarily expanded and adjusted.

The main purpose of this creation is to provide a combined ladder stand that is easy to assemble and disassemble, saving time and effort.

Another object of the present invention is to provide a combined stepped stand that is highly scalable and highly combinable.

Another object of the present invention is to provide a combined step platform to reduce the amount of vertical rods and connecting rods, and to reduce the difficulty and cost of erection.

A further object of the present invention is to provide a combined stepped grandstand, which can be arbitrarily expanded in accordance with the number of shelves, and can be adjusted at any time, and is very flexible.

A further object of the present invention is to provide a combined stepped stand that prevents the seat mount from being detached at will.

In order to achieve the foregoing objectives, the present application will provide a combined step platform comprising a support frame and a plurality of shelves.

The support frame body comprises a plurality of vertical rod bodies and a plurality of connecting rods, the vertical rod bodies are arranged in a plurality of rows, the heights of the vertical rod bodies of the same row are the same, the heights of the vertical rod bodies of different rows are different, and the connecting rods are connected to the rod Between the vertical bars.

Each of the shelves includes a second joint structure and a plurality of steps. Each of the joint structures has a first end and a second end. The first and second ends of each joint structure are detachably disposed at the top ends of the two vertical rods, respectively. The steps of the rack are respectively disposed between the two joint structures of the shelves.

Preferably, each of the vertical rods has a hollow shape and has a through hole extending through the top and bottom ends thereof; wherein each of the joint structures includes a boat frame, a set of joints and a combination rod, the boat frame includes an upper frame and a lower frame. a frame and a plurality of connection frames, the upper frame having a first end and a second end, the lower frame comprising a first segment, a second segment and a third segment, the first frame, the second segment and the second segment Each of the three sections has a first end and a second end, the first end of the upper frame is in contact with the first end of the lower frame, and the second end of the lower frame is connected to the second end of the first segment Between the first ends of the third segment and the upper frame, the second end of the upper frame is connected to the third segment of the lower frame, and the connecting frames are respectively connected to the bottom of the upper frame and the lower portion Between the tops of the first, second, and third segments of the frame, the assembly portion is disposed at a first end of the first segment of the lower frame and is defined as a first end of the bonding structure and has a jack. a top end of a vertical rod body is disposed through the insertion hole of the assembly portion, and the combination rod is disposed at the second end of the third portion of the lower frame and is defined as the first structure of the joint structure a through hole inserted into another vertical rod body; wherein the top end of the other vertical rod body is inserted through the insertion hole of the joint portion of one of the joint structures of the other layer frame, and one of the joint structures of the other layer frame The combination rod is inserted into the perforation of the other vertical rod body.

Preferably, each step comprises two straight rods, two cross rods, a vertical plate body and a horizontal plate body, and the two combination rods of the two combined structures of each layer frame are respectively disposed on the two of the steps of each shelf. The bottom end of the rod, the two straight rods of the other steps of each shelf are disposed at the top of the upper frame, and the joint point corresponds to a joint point of one of the connecting frame and the bottom of the upper frame, each cross bar has a first end and a second end, the first end of each cross bar is disposed in each upper frame, the second end of each cross bar is disposed on a back side of each straight bar, and each vertical plate body is disposed between the two straight bars, each level The plate body is disposed above the two cross bars.

Preferably, the straight rods of the steps of the shelves respectively define a slot, each step comprises a seat fixing frame, and each stepped seat fixing frame comprises a transverse frame body, a first longitudinal frame body and a second longitudinal frame body, the lateral frame body of each stepped seat fixing frame is located above the vertical plate body of each step, and the first longitudinal frame body and the second longitudinal frame body of each stepped seat fixing frame are respectively disposed at each The two ends of the lateral frame of the stepped seat holder extend into the slots of the two straight bars of each step; wherein the steps of each shelf share the same straight bar with the steps of the left and right adjacent shelves. The slot of each straight rod accommodates a first longitudinal frame of the stepped seat holder of each shelf and a second longitudinal frame of the stepped seat holder of the other shelf, the second longitudinal frame protruding a second bump extending below the first longitudinal frame; the combined stepped stand further includes a plurality of seats respectively disposed on the transverse frame of the seat holder.

Preferably, each seat has two supporting portions, and the bottom of each supporting portion has a horizontal arm and two vertical arms, and the two vertical arms are respectively disposed at two ends of the horizontal arm and are common with the horizontal arm A plurality of slots are formed, and a part of the transverse frame of each seat fixing seat is accommodated in the assembly groove of the support portion of each seat.

Preferably, each seat comprises a plurality of fixing seats, each fixing seat comprises a horizontal section and two vertical sections, the two vertical sections are disposed at two ends of the horizontal section and extend upwards, so that the two vertical sections are common with the horizontal section A plurality of lateral frames of each seat fixing seat are accommodated in the grooves of each of the fixing seats, and two vertical sections of each fixing seat are fixed to the bottoms of the two vertical arms of the respective supporting portions.

Preferably, the two vertical arms of each supporting portion respectively define a first screw hole penetrating through the bottom portion thereof, and the two vertical segments of each fixing seat respectively define a second screw hole extending through the top and bottom portions thereof, and each step includes a plurality of tight holes The fastener includes a screw and a head. The screws of the fasteners respectively screw the second screw holes of the two vertical segments of the fixing base and are screwed to the first screw of the two vertical arms of each support portion. In the hole, the bottom surface of the head of each fastener leans against the top end of the vertical plate body of each step.

Preferably, the top surface of the second protrusion abuts against the bottom surface of the first longitudinal frame.

Preferably, the top surface of the second bump is kept at a distance from the bottom surface of the first longitudinal frame.

Preferably, an outer side of the first longitudinal frame protrudes from a first protrusion, and the first protrusion abuts against an outer side of the second longitudinal frame.

Preferably, the inner side of the first longitudinal frame protrudes from a first protrusion, and the first protrusion abuts against an inner side wall of the slot.

Preferably, the two combination rods of the two joint structures of each shelf are integrally formed at the bottom ends of the two straight rods of one of the steps of each shelf.

Preferably, each crossbar has a U-shaped cross section and has a top plate and two side plates. The bottom of one end of the top plate abuts against the top of the upper frame, and the inner sides of one ends of the two side plates respectively abut against the upper frame. Two sides.

Preferably, the combination rod is perpendicular to the third section of the lower frame.

Preferably, the combined step platform further comprises a plurality of fences respectively disposed on two sides of the steps.

This creation can achieve the following effects: First, it is easy to assemble and disassemble, saving time and effort; Secondly, the expansion and combination are very high; Third, reducing the amount of vertical rods and connecting rods, reducing the difficulty of erection and Cost; Fourth, the seat can be arbitrarily expanded with the number of shelves, and can be adjusted at any time, very flexible; Fifth, the seat fixing seat can be prevented from being arbitrarily removed.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a side view of the combined step ladder of the present invention. FIG. 2 is an exploded view of the combined step ladder of the present invention. The present invention provides a combined ladder stand including a support frame. Body 10 and a plurality of shelves 20.

The support frame 10 includes a plurality of vertical rods 11, 11', 11'' and a plurality of links 12. The vertical rods 11, 11', 11" are arranged in a plurality of rows, and the heights of the vertical rods 11, 11', 11" of the same row are the same (not shown), and the rows of vertical rods 11, 11' The height of the 11'' is different. Preferably, each of the vertical rods 11, 11', 11'' is hollow and has a perforation extending through the top and bottom ends thereof. Figure 3 shows the perforations 111' of the vertical shank 11', and the perforations of the remaining vertical shanks 11, 11'' are not shown. The links 12 are connected between the vertical bars 11, 11', 11''. The links 12 may extend laterally or may be inclined relative to the vertical bars 11, 11', 11''.

Each of the shelves 20, 20' includes two joined structures 21, 21' and a plurality of steps 22, 22'. Each of the joint structures 21, 21' has a first end and a second end, and the first and second ends of each of the joint structures 21, 21' are respectively detachably disposed on two of the vertical rods 11, 11' or two of them The top ends of the vertical rods 11', 11". The steps 22, 22' of the shelves 20, 20' are respectively disposed between the two coupling structures 21, 21' of the shelves 20, 20'. More specifically, each of the joint structures 21, 21' includes a boat frame 211, 211', a set of joints 212, 212' and a combination rod 213, 213'. The boat frame 211, 211' includes an upper frame 2111, 2111', a lower frame 2112, 2112', and a plurality of connection frames 2113, 2113'. The upper frames 2111, 2111' have a first end and a second end. The lower frame 2112, 2112' includes a first segment 21121, 21121', a second segment 21122, 21122' and a third segment 21123, 21123', and the first segment 21121, 21121' of the lower frame 2112, 2112' The two segments 21122, 21122' and the third segments 21123, 21123' each have a first end and a second end. The first ends of the upper frames 2111, 2111' are in contact with the first segments 21121, 21121' of the lower frames 2112, 2112'. The second segments 21122, 21122' of the lower frames 2112, 2112' are connected between the second ends of the first segments 21121, 21121' and the first ends of the third segments 21123, 21123' and are parallel to the upper frames 2111, 2111' . The second ends of the upper frames 2111, 2111' are in contact with the third segments 21123, 21123' of the lower frames 2112, 2112'. The connection frames 2113, 2113' are respectively connected to the bottom of the upper frame 2111, 2111' and the first segments 21121, 21121', the second segment 21122, 21122', the third segment 21123, 21123' of the lower frame 2112, 2112'. Between the tops. The assembly ends 212, 212' are disposed at the first ends of the first segments 21121, 21121' of the lower frames 2112, 2112' and are defined as the first ends of the bonding structures 21, 21' and have a jack, one of which The top end of the vertical rod 11'' is passed through the insertion hole of the assembly portion 212. The combination rod 213 is disposed at the second end of the third section 21123 of the lower frame 2112, perpendicular to the third section 21123 of the lower frame 2112, is defined as the second end of the joint structure 21, and is inserted into another vertical rod body. The perforation 111' of 11' is shown in FIG. The top end of the other vertical rod body 11' is passed through the insertion hole 2121' of the joint portion 212' of one of the joint structures 21' of the other layer frame 20'. The combination rod 213' of one of the joint structures 21' of the other shelf 20' is inserted into the perforation of the further vertical rod 11. Each of the steps 22, 22' includes two straight rods 221, 221', two cross bars 222, 222', a vertical plate body 223, 223', and a horizontal plate body 224, 224'. The two combination rods 213, 213' of the two joint structures 21, 21' of the shelf 20, 20' are respectively disposed on the two straight rods 221, 221' of one of the steps 22, 22' of each shelf 20, 20' The bottom end. Specifically, the two combination rods 213, 213' of the two combined structures 21, 21' of the shelves 20, 20' are integrally formed in one of the steps 22, 22' of each of the shelves 20, 20'. The bottom ends of the two straight rods 221, 221'. The two straight rods 221, 221' of the other steps 22, 22' of each shelf 20, 20' are disposed at the top of the upper frames 2111, 2111' and the joint points correspond to one of the connection frames 2113, 2113' and the upper frame 2111. The junction point at the bottom of 2111'. Thereby, the forces applied to the boat frames 211, 211' by the steps 22, 22' are uniformly transmitted to the lower frame 2112 by the first and second ends of the connecting frames 2113, 2113' and the upper frames 2111, 2111'. 2112', so that it is evenly distributed to the entire ship frame 211, 211', and the upper frame 2111, 2111' is prevented from being deformed by carrying the force alone. Each of the crossbars 222, 222' has a first end and a second end, and the first ends of the crossbars 222, 222' are disposed in each of the upper frames 2111, 2111', and the second ends of the crossbars 222, 222' It is disposed on a back side of each of the straight rods 221, 221'. Preferably, each of the crossbars 222, 222' has a U-shaped cross section and has a top plate and two side plates (only the top plate 2221' of the cross bar 222 and one side plate 2222' are shown in FIG. 3), and the bottom of one end of the top plate abuts The inner sides of one end of the two side plates abut against the two sides of the upper frames 2111, 2111' respectively, thereby lifting the cross bars 222, 222' fixed to the upper frames 2111, 2111'. effect. The vertical plates 223, 223' are disposed between the two straight rods 221, 221' as shown in FIG. Each horizontal plate body 224, 224' is disposed above the two cross bars 222, 222' as shown in Figs.

Accordingly, the support structure and shelf of the combined step ladder of the present creation have the following advantages:

First, easy to assemble and disassemble, saving time and effort.

Second, the expansion of extension and combination is very high.

3. The amount of the vertical rods 11, 11', 11'' and the connecting rod 12 is reduced, which reduces the difficulty and cost of erection.

Please refer to FIG. 5 , which is a front view of the seat of the combined step ladder in the present invention. Preferably, the straight rods 221, 221' of the steps 22, 22' of the shelves 20, 20' respectively define a slot 2211, 2211'; each step 22, 22' includes a seat holder 225 225', the seat holders 225, 225' of the steps 22, 22' comprise a transverse frame 2251, 2251', a first longitudinal frame 2252, 2252' and a second longitudinal frame 2253, 2253', The transverse frames 2251, 2251' of the seat holders 225, 225' of the steps 22, 22' are located above the vertical plates 223, 223' of the steps 22, 22', and the seats of the steps 22, 22' The first longitudinal frame 2252, 2252' and the second longitudinal frame 2253, 2253' of the holder 225, 225' are respectively disposed on the transverse frame 2251 of the seat holders 225, 225' of the steps 22, 22'. The two ends of 2251' extend into the slots 2211, 2211' of the two straight rods 221, 221' of each of the steps 22, 22'. Wherein, the steps 22, 22' of the shelves 20, 20' and the steps 22, 22' of the left and right adjacent shelves 20, 20' respectively share the same straight rod 221, 221 ', each of the straight rods 221, 221 'The slots 2211, 2211' accommodate the first longitudinal frames 2252, 2252' of the seat holders 225, 225' of the steps 22, 22' of the shelves 20, 20' and the other shelves 20, 20' a second longitudinal frame 2253, 2253' of the seat holders 225, 225' of the steps 22, 22', the second longitudinal frame 2253, 2253' protruding a second protrusion 22531, 22531', the second convex Blocks 22531, 22531' extend below the first longitudinal frame 2252, 2252'. In the present embodiment, the top surfaces of the second projections 22531, 22531' abut against the bottom surfaces of the first longitudinal frames 2252, 2252'. In other embodiments, the top surface of the second projections 22531, 22531' may also be spaced a distance from the bottom surface of the first longitudinal frame 2252, 2252'. Thereby, when each seat fixing seat 225, 225' moves upward, the second protrusions 22531, 22531' of the second longitudinal frame 2253, 2253' are replaced by the other seat fixing seat 225, 225' The first longitudinal frame 2252, 2252' is blocked such that the second longitudinal frame 22531, 22531' cannot be completely removed from the slots 2211, 2211' of the straight rods 221, 221', thereby preventing the seat holders 225, 225 'Be disassembled at will.

In a preferred embodiment, the outer side of the first longitudinal frame 2252, 2252' protrudes from a first protrusion 22521, 22521', and the first protrusion 22521, 22521' abuts against the second longitudinal frame. The outside of 2253, 2253' is shown in Figure 5. Thereby, the first bumps 22521, 22521' can assist the first longitudinal frame 2252, 2252' to maintain a distance from the second longitudinal frame 2253, 2253'. In other embodiments, the inner side of the first longitudinal frame 2252, 2252' may also protrude from the first protrusions 22521, 22521', and the first protrusions 22521, 22521' abut against the slots 2211, 2211'. Inner side wall. Thereby, the first bumps 22521, 22521' can assist the first longitudinal frame 2252, 2252' to maintain a distance from the inner sidewalls of the slots 2211, 2211'. In another embodiment, the inner and outer sides of the first longitudinal frame 2252, 2252' may respectively protrude from a first protrusion 22521, 22521', wherein a first protrusion 22521, 22521' abuts The outer sides of the second longitudinal frame 2253, 2253' are described, and the other first protrusions 22521, 22521' abut against the inner side walls of the slots 2211, 2211'. Thereby, the first bumps 22521, 22521' can assist the first longitudinal frame 2252, 2252' to maintain a distance from the inner walls of the second longitudinal frame 2253, 2253' and the slots 2211, 2211'. All of the above three embodiments have the same effect: the first longitudinal frame 2252, 2252' is smoothly assembled in the slots 2211, 2211' and does not sway inside the slots 2211, 2211'.

Please refer to FIG. 4. FIG. 4 is a side cross-sectional view of the seat of the combined step platform of the present invention, which is disposed on the shelf. Preferably, the combined stepped platform of the present invention further includes a plurality of seats 30 disposed on the transverse frames 2251, 2251' of the seat holders 225, 225', respectively. Each of the seats 30 has two support portions 31. The bottom of each support portion 31 has a horizontal arm 311 and two vertical arms 312, 313. The two vertical arms 312, 313 are respectively disposed at the two ends of the horizontal arm 311 and A plurality of slots 314 are enclosed with the horizontal arms 311, and a portion of the lateral frames 2251, 2251' of each of the seat mounts 225, 225' are received in the assembly slots 314 of the support portions 31 of the respective seats 30. Specifically, each of the seats 30 includes a plurality of fixing bases 32. Each of the fixing bases 32 includes a horizontal section 321 and two vertical sections 322 and 323. The two vertical sections 322 and 323 are disposed at two ends of the horizontal section 321 and extend upward. The two vertical segments 322, 323 and the horizontal segment 321 together define a concave groove 324, and a portion of the lateral frame body 2251, 2251' of each of the seat fixing seats 225, 225' is received in the concave groove 324 of each fixing seat 32. The two vertical sections 322 and 323 of each fixing seat 32 are fixed to the bottoms of the two vertical arms 312 and 313 of the respective supporting portions 31. In this embodiment, the two vertical arms 312 and 313 of each supporting portion 31 respectively define a first screw hole 3121 and 3131 extending through the bottom portion thereof; and the two vertical segments 322 and 323 of each fixing seat 32 respectively open through the top thereof. a second screw hole 3221, 3231 at the bottom; each step 22, 22' includes a plurality of fasteners 226, 226', each of the fasteners 226, 226' includes a screw 2261, 2261' and a head 2262, 2262', The screws 2261, 2261' of the fasteners 226, 226' are respectively screwed to the second screw holes 3221, 3231 of the two vertical sections 322, 323 of the respective fixing bases 32 and are screwed to the two vertical arms 312 of the respective support portions 31. In the first screw holes 3121, 3131 of the 313, the bottom surfaces of the heads 2262, 2262' of the fasteners 226, 226' lean against the top ends of the vertical plates 223, 223' of the steps 22, 22'. Thereby, the user can quickly set the plurality of seats 30 firmly on the steps 22, 22' when erecting the creation, and the number of the seats 30 can be arbitrarily expanded in accordance with the number of the shelves 20, 20', and Adjust at any time, very flexible.

In addition, the combined step ladder of the present invention further includes a plurality of fences 50 respectively disposed on two sides of the steps 22, 22' to enhance the security of the creation, as shown in FIG.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any form of limitation on the creation, so that any modification or alteration of the creation made in the same creative spirit is provided. , should still be included in the scope of protection of this creative intent.

10‧‧‧Support frame
11, 11', 11'' ‧ ‧ vertical rod body
111'‧‧‧Perforation
12‧‧‧ Connecting rod
20, 20'‧‧‧ shelves
21, 21'‧‧‧ combination structure
211, 211 '‧‧‧ ship frame
2111, 2111'‧‧‧ upper box
2112, 2112'‧‧‧ lower frame
21121, 21121'‧‧‧ first paragraph
21122, 21122'‧‧‧ second paragraph
21123, 21123'‧‧‧ third paragraph
2113, 2113'‧‧‧ connection box
212, 212' ‧ ‧ joints
2121'‧‧‧ jack
213, 213'‧‧‧ combination rod
22, 22' ‧ ‧ ladder
221, 221'‧‧‧ Straight
2211, 2211'‧‧‧ slots
222, 222'‧‧‧ crossbar
2221'‧‧‧ top board
2222'‧‧‧ side panel
223, 223'‧‧‧ vertical plate
224, 224'‧‧‧ horizontal plate
225, 225'‧‧‧ seat holder
2251, 2251'‧‧‧ transverse frame
2252, 2252'‧‧‧ first longitudinal frame
22521, 22521'‧‧‧ first bump
2253, 2253'‧‧‧ second longitudinal frame
22531, 22531'‧‧‧second bump
226, 226'‧‧‧ fasteners
2261, 2261'‧‧‧ screw
2262, 2262'‧‧‧ head
30‧‧‧ seats
31‧‧‧Support
311‧‧‧ horizontal arm
312, 313‧‧‧ vertical arms
3121, 3131‧‧‧ first screw hole
314‧‧‧ group slot
32‧‧‧ fixed seat
321‧‧‧ horizontal section
322, 323‧‧‧ vertical section
3221, 3231, ‧ ‧ second screw hole
324‧‧ ‧ Groove
50‧‧‧ fence

Figure 1 is a side view of the combined step ladder of the present invention. Figure 2 is an exploded view of the combined stepped grandstand of the present invention. Figure 3 is a cross-sectional view showing the manner in which the two-story frame of the combined stepped stand of the present invention is combined. Figure 4 is a side cross-sectional view of the seat of the combined stepped grandstand of the present invention, which is disposed on the shelf. Figure 5 is a front elevational view of the seat of the combined stepped grandstand of the present invention. Figure 6 is a side view of the combined ladder stand with a fence installed in the present invention.

20, 20’‧‧‧ shelves

21, 21' ‧ ‧ combined structure

211, 211’‧‧‧ ship frame

2111, 2111’‧‧‧

2112, 2112’‧‧‧

21121, 21121’‧‧‧ first paragraph

21122, 21122’‧‧‧ second paragraph

21123, 21123’‧‧‧ third paragraph

2113, 2113'‧‧‧ connection box

212, 212' ‧ ‧ joints

213, 213’‧‧‧ combination rod

22, 22’‧‧‧ ladder

221, 221’‧‧‧ Straight

222, 222’‧‧‧ crossbar

224, 224’ ‧ ‧ horizontal plate

30‧‧‧ seats

31‧‧‧Support

Claims (15)

A combined step platform includes: a support frame body comprising a plurality of vertical rod bodies and a plurality of connecting rods, the vertical rod bodies are arranged in a plurality of rows, the heights of the vertical rod bodies of the same row are the same, and the heights of the vertical rod bodies of different rows Differently, the connecting rods are connected between the vertical rod bodies; and the plurality of layers, each comprising a two-bonding structure and a plurality of steps, each of the connecting structures having a first end and a second end, each of the combined structures 1. The second ends are respectively detachably disposed at the top ends of the two vertical rods, and the steps of the shelves are respectively disposed between the two joint structures of the shelves. The combined step platform of claim 1, wherein each of the vertical rods has a hollow shape and has a through hole extending through the top and bottom ends thereof; wherein each of the joint structures comprises a ship frame, a set of joints, and A combination rod, the boat frame includes an upper frame, a lower frame and a plurality of connecting frames, the upper frame having a first end and a second end, the lower frame including a first segment, a second segment and a third a first end, a second end and a second end of the lower frame each having a first end and a second end, the first end of the upper frame being in contact with the first end of the lower frame, the lower frame a second segment is connected between the second end of the first segment and the first end of the third segment and parallel to the upper frame, and the second end of the upper frame is in contact with the third segment of the lower frame, The connecting frame is respectively connected between the bottom of the upper frame and the top of the first, second and third segments of the lower frame, the connecting portion is disposed at the first end of the first segment of the lower frame and is defined as The first end of the combined structure has a jack, wherein a top end of a vertical rod body is inserted through the insertion hole of the assembly portion, and the combination rod is disposed in the lower frame The second end of the third segment is defined as the second end of the bonding structure and is inserted into the through hole of the other vertical bar; wherein the top end of the other vertical bar is passed through one of the bonding structures of the other shelf The jack of the assembly portion, the combination rod of one of the combined structures of the other shelf is inserted into the through hole of the further vertical rod. The combined step platform of claim 2, wherein each step comprises two straight bars, two cross bars, a vertical plate body and a horizontal plate body, and the two combination bars of the two combined structures of each shelf The bottom ends of the two straight rods respectively disposed on one of the steps of each shelf, the two straight bars of the other steps of each shelf are disposed at the top of the upper frame and the joint points correspond to one of the connecting frame and the bottom of the upper frame The connecting rod has a first end and a second end, the first end of each cross bar is disposed in each upper frame, and the second end of each cross bar is disposed on a back side of each straight bar, each vertical The plate body is disposed between the two straight rods, and each horizontal plate body is disposed above the two horizontal rods. The combined stepped stand according to claim 3, wherein the straight bars of the steps of the shelves respectively define a slot, each step comprises a seat fixing frame, and the seat fixing frame of each step The utility model comprises a transverse frame body, a first longitudinal frame body and a second longitudinal frame body, wherein the lateral frame body of each stepped seat holder is located above the vertical plate body of each step, and the first step of each stepped seat frame The longitudinal frame body and the second longitudinal frame body are respectively disposed at two ends of the transverse frame body of each stepped seat fixing frame and extend into the slots of the two straight bars of each step; wherein the steps of each shelf are adjacent to the left and right sides The steps of the two-layer shelf respectively share the same straight rod, and the slot of each straight rod accommodates the first longitudinal frame of the stepped seat holder of each shelf and the stepped seat holder of the other shelf a second longitudinal frame, the second longitudinal frame protrudes from a second protrusion, the second protrusion extends below the first longitudinal frame; the combined step platform further comprises a plurality of seats, respectively The transverse frame of the seat holder. The combined step platform according to claim 4, wherein each seat has two supporting portions, and the bottom of each supporting portion has a horizontal arm and two vertical arms, and the two vertical arms are respectively disposed on the The two ends of the horizontal arm and the horizontal arm together define a set of slots, and a part of the transverse frame of each seat fixing seat is accommodated in the assembly groove of the support portion of each seat. The combined step platform of claim 5, wherein each seat comprises a plurality of fixing seats, each fixing seat comprises a horizontal section and two vertical sections, wherein the two vertical sections are disposed at two ends of the horizontal section and Extending upwardly, the two vertical segments and the horizontal segment together define a groove, a part of the lateral frame of each seat fixing seat is accommodated in the groove of each fixing seat, and two vertical segments of each fixing seat are fixed on The bottom of the two vertical arms of each support portion. The combined stepped platform according to claim 6, wherein the two vertical arms of each support portion respectively define a first screw hole extending through the bottom thereof, and the two vertical segments of each fixed seat respectively open through the top thereof. a second screw hole at the bottom, each step includes a plurality of fasteners, each of the fasteners includes a screw and a head, and the screws of the fasteners respectively screw the second screw holes of the two vertical segments of the fixing bases and are screwed In the first screw holes of the two vertical arms of the respective support portions, the bottom surface of the head of each fastener leans against the top end of the vertical plate body of each step. The combined step platform of claim 4, wherein the top surface of the second bump abuts against the bottom surface of the first longitudinal frame. The combined step platform of claim 4, wherein a top surface of the second bump is at a distance from a bottom surface of the first longitudinal frame. The combined step platform of claim 4, wherein an outer side of the first longitudinal frame protrudes from a first protrusion, and the first protrusion abuts against an outer side of the second longitudinal frame . The combined step platform of claim 4, wherein the inner side of the first longitudinal frame protrudes from a first protrusion, and the first protrusion abuts against an inner side wall of the slot. The combined step platform of claim 3, wherein the two combination bars of the two combined structures of each shelf are integrally formed at the bottom ends of the two straight bars of one of the steps of each shelf. The combined step platform of claim 3, wherein each cross section has a U-shaped cross section and has a top plate and two side plates, and a bottom of one end of the top plate abuts against a top of the upper frame, the second The inner sides of one end of the side plates respectively abut against the two sides of the upper frame. The combined step platform of claim 2, wherein the combination rod is perpendicular to the third section of the lower frame. The combined step platform as described in claim 1 of the patent application, further comprising a plurality of fences, respectively disposed on two sides of the steps.