CN211201090U

CN211201090U - Scaffold

Info

Publication number: CN211201090U
Application number: CN201921973730.4U
Authority: CN
Inventors: 吴建海; 王薛琳
Original assignee: Beijing Jiangnan Decoration Co ltd
Current assignee: Beijing Jiangnan Decoration Co ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-08-07
Anticipated expiration: 2029-11-14

Abstract

The utility model relates to a scaffold, belonging to the technical field of engineering scaffolds, which comprises a pedal arranged horizontally, wherein the four corners of the lower surface of the pedal are respectively provided with a first support rod and a second support rod for supporting the pedal on the ground, third bracing piece and fourth bracing piece, first bracing piece has seted up first groove of sliding on the lateral wall of second bracing piece of orientation, second groove of sliding has been seted up on the lateral wall of second bracing piece orientation first bracing piece, be provided with the cat ladder between first bracing piece and the second bracing piece, the cat ladder includes head rod and second connecting rod, the rigid coupling has many to step on the pole between head rod and the second connecting rod, the rigid coupling has first slide bar on the lateral wall of head rod, the rigid coupling has the second slide bar on the lateral wall of second connecting rod, first slide bar slides with first groove of sliding and is connected, the second slide bar slides with the second groove of sliding and is connected. The climbing pedal has the characteristic of enabling operators to climb the pedal safely.

Description

Scaffold

Technical Field

The utility model belongs to the technical field of the technique of scaffold frame for the engineering and specifically relates to a scaffold frame is related to.

Background

Scaffolding refers to various supports erected on a construction site for workers to handle and solve vertical and horizontal transportation. The scaffold is widely applied to places such as warehouses, libraries, production workshops and the like due to the characteristics of small scaffold body, light weight, convenience in movement and the like.

As shown in fig. 1, a scaffold comprises a rectangular pedal 1, the pedal 1 is horizontally arranged, four corners of the lower surface of the pedal 1 are respectively provided with a first support rod 11, a second support rod 12, a third support rod 13 and a fourth support rod 14, the bottom ends of the first support rod 11, the second support rod 12, the third support rod 13 and the fourth support rod 14 are fixedly connected with a rectangular stabilizing plate 7 for increasing the contact area with the ground, the first support rod 11 and the second support rod 12 are positioned at the same end of the pedal 1, the third support rod 13 and the fourth support rod 14 are positioned at the same end of the pedal 1, in order to increase the stability of the scaffold, a first fixing rod 4 is fixedly connected between the first support rod 11 and the third support rod 13, a second fixing rod 5 is fixedly connected between the second support rod 12 and the fourth support rod 14, and a third fixing rod 6 is fixedly connected between the third support rod 13 and the fourth support rod 14, a fourth fixing rod 8 is fixedly connected between the first supporting rod 11 and the second supporting rod 12.

When the operation personnel uses this kind of scaffold frame during operation, at first move the scaffold frame to predetermined position on, then climb up the step and carry out work, do not set up the device that is used for the operation personnel to climb up the step on the scaffold frame, so the operation personnel mostly are through climbing up the step or climbing up the step with the help of some external equipment (like the stool etc.) with the help of some supporting parts on the support frame along vertical direction, and the general weight of scaffold frame is lighter, when the operation personnel climbs up the step with vertical direction with the help of the support frame, the center of scaffold frame is kept away from to staff's position, the too big and unstable that leads to of pulling force when the scaffold frame is very easy to climb because of the operation personnel, thereby there is certain potential safety hazard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a scaffold frame, it has the characteristics that enable the comparatively safe climbing of operation personnel to go up the step board.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a scaffold, the trample that includes the level setting, the four corners position department of trample lower surface is provided with respectively supports the trample in subaerial first bracing piece, the second bracing piece, third bracing piece and fourth bracing piece, first bracing piece has seted up first groove of sliding on the lateral wall of second bracing piece, second bracing piece has seted up the second groove of sliding on the lateral wall of first bracing piece of second bracing piece orientation, be provided with the cat ladder between first bracing piece and the second bracing piece, the cat ladder includes head rod and second connecting rod, the rigid coupling has many to step on the pole between head rod and the second connecting rod, the rigid coupling has first slide bar on the lateral wall of head rod, the rigid coupling has the second slide bar on the lateral wall of second connecting rod, first slide bar slides with first groove and is connected, the second slide bar slides with the second groove and is connected.

Through adopting above-mentioned technical scheme, when the staff need climb on the pedal, use first slide bar and second slide bar as the rotatory cat ladder of axle, first slide bar slides down along first sliding groove this moment, second slide bar slides down along second sliding groove, according to actual conditions with the cat ladder rotation to suitable angle, then the staff can climb the pedal through the cat ladder on, the staff passes through the in-process of cat ladder climbing, cat ladder and first bracing piece, second bracing piece and ground form triangle-shaped, thereby make staff safety more in the climbing.

The utility model discloses further set up to the cross-section in first sliding groove and second sliding groove all sets up to L shape, and the one end rigid coupling that the head rod was kept away from to first slide bar has the first slide board of circular shape, and the one end rigid coupling that the second connecting rod was kept away from to the second slide bar has the second slide board of circular shape, and first slide board is located first sliding groove, and first slide board slides with first sliding groove and is connected, and the second slide board is located the second sliding groove, and the second slide board slides with the second sliding groove and is connected.

Through adopting above-mentioned technical scheme, when the weight that the scaffold bore is heavier, when first bracing piece and second bracing piece have the trend of opposite direction motion, first slide board and second slide board can restrict first bracing piece and second bracing piece, and then make more stable of scaffold.

The utility model discloses further set up to: and the first support rod is provided with a locking assembly used for locking the ladder stand when the ladder stand is not used.

Through adopting above-mentioned technical scheme, can fix the cat ladder at the in-process locking device that the scaffold removed, avoid shaking the production insecurity at the in-process that the scaffold removed back and forth.

The utility model discloses further set up to: locking device has seted up the ejection groove including popping out the pole on the lateral wall of first bracing piece towards the second bracing piece, pop out the pole and pop out the cover and slide and be connected, the rigid coupling has the spring-out between the one end of popping out the pole and the bottom surface of popping out the groove, the spread groove has been seted up on the lateral wall of first bracing piece, it has the rotary rod to articulate on the inside lateral wall of spread groove, set up the circular port that makes ejection groove and spread groove intercommunication on the pop-out tank bottom surface, the rigid coupling has the stay cord on the ejection pole, the stay cord passes and stretches into in the spread groove from the circular port after popping out the spring, stay cord and rotary rod rigid coupling, the joint groove has been seted up on the lateral wall that deviates from the second connecting rod on the head.

Through adopting above-mentioned technical scheme, when the cat ladder did not use, the ejection pole stretches into the joint inslot after popping out from popping out the inslot under the effect of pop-up spring, and the ejection pole can be fixed the cat ladder. When the cat ladder is used, the rotary rod is rotated downwards, the rotary rod pulls the stay cord, the stay cord pulling ejection rod is withdrawn from the clamping groove and then retracted into the ejection groove, and the cat ladder can be rotated for use after losing the limit.

The utility model discloses further set up to: the connecting groove and the popping groove are positioned at the bottom of the first supporting rod, and the rotating rod is fixedly connected with a pedal rod.

Through adopting above-mentioned technical scheme, when the staff need cancel locking device to the restriction of cat ladder, the staff can step on the pedal pole through the foot and accomplish the slip of ejection rod in the pop-up groove when the cat ladder is held to both hands.

The utility model discloses further set up to: and one end of the pedal rod, which is far away from the rotating rod, is fixedly connected with a pedal, and the pedals are obliquely arranged upwards.

Through adopting above-mentioned technical scheme, when having avoided the staff directly to rotate the rotary rod through foot pedal pole, at the rotatory in-process of rotary rod, staff's foot drops from pedal pole.

The utility model discloses it further sets up to the rigid coupling has L first backup pad that appears on the lateral wall of first bracing piece orientation second bracing piece, the rigid coupling has L second backup pad that appears on the lateral wall of second bracing piece orientation first bracing piece, and when the cat ladder was placed in first backup pad and second backup pad, the pop-up groove just in time aligns with the joint groove.

Through adopting above-mentioned technical scheme, first backup pad and second backup pad can support the cat ladder at first, when the cat ladder does not use, at first place first backup pad and second backup pad with the cat ladder on, pop out the groove and just in time align with the joint groove this moment, make things convenient for locking device to lock the cat ladder.

The utility model discloses further set up to: the utility model discloses a bracing piece, including first bracing piece, third bracing piece, fourth bracing piece, the rigid coupling has first dead lever between first bracing piece and the third bracing piece, the rigid coupling has the second dead lever between second bracing piece and the fourth bracing piece, the rigid coupling has the third dead lever between third bracing piece and the fourth bracing piece.

Through adopting above-mentioned technical scheme, increased the relation of connection between first bracing piece, second bracing piece, third bracing piece and the fourth bracing piece, and then made more stable of scaffold frame.

To sum up, the utility model discloses a beneficial technological effect does:

1. the ladder stand is arranged between the first supporting rod and the second supporting rod, the side wall of the first supporting rod facing the second supporting rod is provided with a first sliding groove, the side wall of the second supporting rod facing the first supporting rod is provided with a second sliding groove, the ladder stand is provided with a first sliding rod and a second sliding rod, the first sliding rod is connected with the first sliding groove in a sliding manner, the second sliding rod is connected with the second sliding groove in a sliding manner, when a worker needs to climb on the pedal, the ladder stand is rotated by taking the first sliding rod and the second sliding rod as axes, at the moment, the first sliding rod slides downwards along the first sliding groove, the second sliding rod slides downwards along the second sliding groove, the ladder stand is rotated to a proper angle according to actual conditions, then the worker can climb on the pedal through the ladder stand, and in the climbing process of the worker, the ladder stand, the first supporting rod, the second supporting rod and the ground form a triangle, therefore, the worker can climb more safely;

2. through set up locking device on first bracing piece, locking device is including popping out the pole, set up on the first bracing piece and pop out groove and spread groove, it sets up in popping out the inslot to pop out the pole, rigid coupling pop-up spring between the bottom surface in pop-up pole and the play groove, set up the circular port between pop-up groove and the spread groove, the rigid coupling stay cord on the pop-up pole, the stay cord penetrates the spread groove from the circular port, articulated rotary rod in the spread groove, stay cord and rotary rod rigid coupling, when the cat ladder was not used, it pops out the back and stretches into the joint inslot from popping out the inslot to pop out the pole under the effect that pops out the spring, it can fix the cat ladder. When the crawling ladder is used, the rotating rod is rotated downwards, the rotating rod pulls the pull rope, the pull rope pulls the ejection rod to be drawn out from the clamping groove and then to be retracted into the ejection groove, and the crawling ladder can be rotated for use after being out of limit;

3. through the first backup pad of rigid coupling on first bracing piece, rigid coupling second backup pad on the second bracing piece, first backup pad and second backup pad can support the cat ladder at first, when the cat ladder does not use, at first place first backup pad and second backup pad with the cat ladder on, pop out the groove and just in time align with the joint groove this moment, make things convenient for locking device to lock the cat ladder.

Drawings

FIG. 1 is a schematic view of the overall structure of a prior art scaffold;

FIG. 2 is a schematic view of the overall structure of the scaffold in this embodiment;

fig. 3 is a partially enlarged view of a portion a in fig. 2;

FIG. 4 is a schematic structural view of the scaffold in this embodiment;

FIG. 5 is a schematic structural view of portion B of FIG. 4;

FIG. 6 is a schematic structural view of the ladder stand in this embodiment;

FIG. 7 is a schematic structural view showing the first and second sliding grooves in this embodiment;

FIG. 8 is a schematic view of the salient locking assembly structure of this embodiment.

In the figure, 1, a pedal is stepped; 11. a first support bar; 111. a first sliding groove; 112. a pop-up slot; 1121. a circular hole; 113. connecting grooves; 114. a first support plate; 12. a second support bar; 121. a second sliding groove; 122. a second support plate; 13. a third support bar; 14. a fourth support bar; 2. climbing a ladder; 21. a first connecting rod; 211. a first slide bar; 2111. a first slide plate; 212. a clamping groove; 22. a second connecting rod; 221. a second slide bar; 2211. a second slide plate; 23. treading the lever; 3. a locking assembly; 31. ejecting the rod; 32. ejecting a spring; 33. pulling a rope; 34. rotating the rod; 341. a foot lever; 3411. a foot pedal; 4. a first fixing lever; 5. a second fixing bar; 6. a third fixing bar; 7. a stabilizing plate; 8. and a fourth fixing rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 2, the scaffold disclosed in the present invention comprises a rectangular pedal 1, the pedal 1 is horizontally disposed, four corners of the lower surface of the pedal 1 are respectively provided with a first support bar 11, a second support bar 12, a third support bar 13 and a fourth support bar 14, the first support bar 11, the utility model discloses a ladder stand, including first bracing piece 12, third bracing piece 13 and fourth bracing piece 14, the equal rigid coupling in bottom of third bracing piece has the stabilizer plate 7 of the rectangle that increases with ground area of contact, first bracing piece 11 and second bracing piece 12 are located pedal 1 same end, third bracing piece 13 and fourth bracing piece 14 are located pedal 1 same end, be provided with cat ladder 2 between first bracing piece 11 and the second bracing piece 12, cat ladder 2 includes rectangular head rod 21 and rectangular second connecting rod 22, the rigid coupling has many to step on pole 23 between head rod 21 and the second connecting rod 22, many steps on the length direction evenly distributed of pole 23 along first bracing piece 11 and second bracing piece 12.

As shown in fig. 2 and 4, a first sliding groove 111 is formed on a side wall of the top of the first support bar 11 facing the second support bar 12, a second sliding groove 121 is formed on a side wall of the top of the second support bar 12 facing the first support bar 11, and the first sliding groove 111 and the second sliding groove 121 are located at the same height.

As shown in fig. 6, a cylindrical first sliding rod 211 is fixedly connected to a side wall of the top of the first connecting rod 21 away from the second connecting rod 22, and the first sliding rod 211 is perpendicular to the first connecting rod 21. A cylindrical second sliding rod 221 is fixedly connected to the side wall of the top of the second connecting rod 22 away from the first connecting rod 21, and the second sliding rod 221 is perpendicular to the second connecting rod 22. The first sliding rod 211 is located in the first sliding groove 111, the first sliding rod 211 can slide up and down in the first sliding groove 111, the second sliding rod 221 is located in the second sliding groove 121, and the second sliding rod 221 can slide up and down in the second sliding groove 121.

When a worker needs to climb onto the pedal 1, the ladder 2 is rotated by taking the first sliding rod 211 and the second sliding rod 221 as axes, at the moment, the first sliding rod 211 slides downwards along the first sliding groove 111, the second sliding rod 221 slides downwards along the second sliding groove 121, the ladder 2 is rotated to a proper angle according to practical conditions, and then the worker can climb onto the pedal 1 through the ladder 2.

As shown in fig. 6 and 7, in order to further stabilize the ladder 2 and the scaffold, the cross sections of the first sliding groove 111 and the second sliding groove 121 are T-shaped, a circular first sliding plate 2111 is fixedly connected to one end of the first sliding rod 211, which is far away from the first connecting rod 21, the first sliding rod 211 is perpendicular to the first sliding plate 2111, the first sliding plate 2111 is located in the first sliding groove 111, and the first sliding plate 2111 is slidably connected to the first sliding groove 111. One end of the second sliding rod 221, which is far away from the second connecting rod 22, is fixedly connected with a circular second sliding plate 2211, the second sliding plate 2211 is perpendicular to the second connecting rod 22, the second sliding plate 2211 is located in the second sliding groove 121, and the second sliding plate 2211 is connected with the second sliding groove 121 in a sliding manner. When the scaffold bears a heavy weight and the first support rod 11 and the second support rod 12 tend to move in opposite directions, the first sliding plate 2111 and the second sliding plate 2211 can limit the first support rod 11 and the second support rod 12, so that the scaffold is more stable.

As shown in fig. 5 and 8, when the scaffold is moved, the ladder 2 is not necessarily fixed, and the ladder 2 may shake back and forth, which is not favorable for moving the scaffold. In order to fix the ladder stand 2, the first support rod 11 is provided with the locking assembly 3, the locking assembly 3 comprises a rectangular ejection rod 31, the bottom of the first support rod 11 faces the side wall of the second support rod 12 and is provided with a rectangular ejection groove 112, the ejection groove 112 is perpendicular to the first support rod 11, the ejection rod 31 is located in the ejection groove 112, the ejection rod 31 is connected with the ejection groove 112 in a sliding manner, and an ejection spring 32 is fixedly connected between the bottom of the ejection groove 112 and one end of the ejection rod 31. A rectangular connecting groove 113 is formed in the side wall of the bottom of the first support rod 11 away from the second support rod 12, the connecting groove 113 is formed along the length direction of the first support rod 11, a circular hole 1121 which is communicated with the connecting groove 113 is formed in the bottom surface of the ejection groove 112, a pull rope 33 is fixedly connected to the end surface of the fixed end of the ejection rod 31 and the ejection spring 32, and the pull rope 33 penetrates through the ejection spring 32 and then penetrates into the connecting groove 113 from the circular hole 1121. The two side walls at the bottom of the connecting groove 113 are provided with rotating rods 34, one end of each rotating rod 34 is hinged with the two side walls at the bottom of the connecting groove 113, and one end of each pull rope 33, which is far away from the ejection rod 31, is fixedly connected with the upper surface of the corresponding rotating rod 34.

As shown in fig. 6, a rectangular clamping groove 212 is formed in a side wall of the first connecting rod 21 on the ladder 2 away from the second connecting rod 22, and the pop-up rod 31 is located in the clamping groove 212.

When the ladder stand 2 is not used, the ejecting rod 31 is ejected from the ejecting groove 112 under the action of the ejecting spring 32 and then extends into the clamping groove 212, and the ejecting rod 31 can fix the ladder stand 2. When the ladder stand 2 is used, the rotating rod 34 is rotated downwards, the rotating rod 34 pulls the pulling rope 33, the pulling rope 33 pulls the ejecting rod 31 to be drawn out from the clamping groove 212 and then to be retracted into the ejecting groove 112, and at the moment, the ladder stand 2 can be used in a rotating mode after being out of limit.

Because the worker usually holds the ladder stand 2 with both hands when locking the ladder stand 2 or canceling the locking of the ladder stand 2, it is inconvenient and unsafe to separate one hand to rotate the rotating rod 34, the connecting slot 113 is located below the first supporting rod 11, and the pedal rod 341 is fixed on the side wall of the rotating rod 34 far from the pulling rope 33 for the convenience of rotating the rotating rod 34. The worker can complete the sliding of the eject lever 31 in the eject slot 112 by stepping on the foot lever 341 while holding the ladder 2 with both hands.

If the foot lever 341 is only a rectangular lever, when the worker rotates the rotating lever 34 by using the foot lever 341, the rotating lever 34 rotates to a certain degree, the foot of the worker easily slides off the foot lever 341, in order to avoid the foot of the worker sliding off the foot lever 341 when rotating the rotating lever 34, a pedal 3411 is fixedly connected to one end of the foot lever 341 away from the rotating lever 34, and the pedal 3411 is obliquely arranged upward.

As shown in fig. 3 and 4, when the ladder stand 2 is locked, the pop-up groove 112 is not easily aligned with the fastening groove 212, so that the pop-up rod 31 is not easily inserted into the fastening groove 212, in order to make the pop-up rod 31 more easily inserted into the fastening groove 212, the side wall of the first support rod 11 facing the second support rod 12 is fixedly connected with the L-shaped first support plate 114, the side wall of the second support rod 12 facing the first support rod 11 is fixedly connected with the L-shaped second support plate 122, the first support rod 11 and the second support rod 12 are equal in height, when the ladder stand 2 is not used, the ladder stand 2 is firstly placed on the first support plate 114 and the second support plate 122, at this time, the pop-up groove 112 and the fastening groove 212 are exactly aligned, and the pop-up rod 31 can exactly inserted into the fastening groove 212.

In order to increase the stability of the scaffold, a first fixing rod 4 is fixedly connected between the first support rod 11 and the third support rod 13, a second fixing rod 5 is fixedly connected between the second support rod 12 and the fourth support rod 14, and a third fixing rod 6 is fixedly connected between the third support rod 13 and the fourth support rod 14.

The implementation principle of the embodiment is as follows: when the worker needs to go up to the pedal 1 through the ladder 2, the worker holds the ladder 2 with both hands, then steps on the foot lever 341 with the foot, rotates the rotating rod 34 downward through the foot lever 341, and at this time, the rotating rod 34 pulls the pulling rope 33, and the pulling rope 33 pulls the ejecting rod 31 to retract into the ejecting groove 112 from the snap-in groove 212. At this time, the worker takes the ladder 2 off the first support plate 114 and the second support plate 122, and then rotates the ladder 2 to a proper angle, and the worker can go up to the step 1 through the ladder 2.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A scaffold, characterized in that: comprises a pedal (1) which is horizontally arranged, a first support rod (11), a second support rod (12), a third support rod (13) and a fourth support rod (14) which are arranged on the lower surface of the pedal (1) and used for supporting the pedal (1) on the ground, a first sliding groove (111) is arranged on the side wall of the first support rod (11) facing the second support rod (12), a second sliding groove (121) is arranged on the side wall of the second support rod (12) facing the first support rod (11), a ladder stand (2) is arranged between the first support rod (11) and the second support rod (12), the ladder stand (2) comprises a first connecting rod (21) and a second connecting rod (22), a plurality of pedal rods (23) are fixedly connected between the first connecting rod (21) and the second connecting rod (22), a first sliding rod (211) is fixedly connected on the side wall of the first connecting rod (21), and a second sliding rod (221) is fixedly connected on the side wall of the second connecting rod (22), the first sliding rod (211) is connected with the first sliding groove (111) in a sliding mode, and the second sliding rod (221) is connected with the second sliding groove (121) in a sliding mode.

2. A scaffold according to claim 1, wherein the cross sections of the first sliding groove (111) and the second sliding groove (121) are both L-shaped, one end of the first sliding rod (211) far away from the first connecting rod (21) is fixedly connected with a circular first sliding plate (2111), one end of the second sliding rod (221) far away from the second connecting rod (22) is fixedly connected with a circular second sliding plate (2211), the first sliding plate (2111) is located in the first sliding groove (111), the first sliding plate (2111) is connected with the first sliding groove (111) in a sliding manner, the second sliding plate (2211) is located in the second sliding groove (121), and the second sliding plate (2211) is connected with the second sliding groove (121) in a sliding manner.

3. A scaffolding according to claim 2, wherein: the first supporting rod (11) is provided with a locking component (3) used for locking the ladder stand (2) when the ladder stand (2) is not used.

4. A scaffolding according to claim 3, wherein: the locking assembly (3) comprises an ejection rod (31), an ejection groove (112) is formed in the side wall, facing the second support rod (12), of the first support rod (11), the ejection rod (31) is connected with the ejection groove (112) in a sliding mode, an ejection spring (32) is fixedly connected between one end of the ejection rod (31) and the bottom surface of the ejection groove (112), a connecting groove (113) is formed in the side wall of the first support rod (11), a rotating rod (34) is hinged to the side wall inside the connecting groove (113), a circular hole (1121) enabling the ejection groove (112) to be communicated with the connecting groove (113) is formed in the bottom surface of the ejection groove (112), a pull rope (33) is fixedly connected to the ejection rod (31), the pull rope (33) penetrates through the ejection spring (32) and then extends into the connecting groove (113) from the circular hole (1121), the pull rope (33) is fixedly connected with the rotating rod (34), and a clamping groove (212) is formed in the side wall, which is far away from the second connection rod (22), of the, the ejection rod (31) penetrates into the clamping groove (212).

5. A scaffolding according to claim 4, wherein: the connecting groove (113) and the ejecting groove (112) are positioned at the bottom of the first supporting rod (11), and the rotating rod (34) is fixedly connected with a pedal rod (341).

6. A scaffolding according to claim 5, wherein: one end of the pedal rod (341) far away from the rotating rod (34) is fixedly connected with a pedal (3411), and the pedal (3411) is obliquely arranged upwards.

7. A scaffold according to claim 6, wherein the side wall of the first support bar (11) facing the second support bar (12) is fixedly connected with a L-shaped first support plate (114), the side wall of the second support bar (12) facing the first support bar (11) is fixedly connected with a L-shaped second support plate (122), and when the ladder (2) is placed on the first support plate (114) and the second support plate (122), the ejecting groove (112) is exactly aligned with the clamping groove (212).

8. A scaffolding according to claim 1, wherein: the rigid coupling has first dead lever (4) between first bracing piece (11) and third bracing piece (13), the rigid coupling has second dead lever (5) between second bracing piece (12) and fourth bracing piece (14), the rigid coupling has third dead lever (6) between third bracing piece (13) and fourth bracing piece (14).