A quick-detachable scaffold

Abstract

The present invention belongs to the technical field of scaffolding, and specifically is a quick-disassembly scaffolding, including a door frame, a connecting tube fixedly provided on the top of the door frame, a plug-in column coaxially plugged with the connecting tube is provided at the bottom, a tensioning member that can elastically expand radially is provided at the end of the plug-in column, and a control assembly is integrated in the climbing ladder of the door frame, comprising a lever-type pressure handle and a linkage mechanism pivotally connected by a first pin shaft. When the pressure handle is flipped upward, the tensioning member is driven by the linkage mechanism to expand radially and lock on the inner wall of the connecting tube, forming a circumferential multi-point friction fixation. When the pressure handle is flipped downward, the tensioning member is driven to contract radially and generate an axial lifting force to achieve rapid separation, so that the plug-in column and the connecting tube are quickly separated; through the above-mentioned structural coordination, the connection between the upper and lower door frames is more stable, avoiding shaking caused by wear of the scaffolding plug-in part, and at the same time improving the disassembly speed and safety of the scaffolding.

Description

Technical Field

[0001] The invention belongs to the technical field of scaffolds, in particular to a quick-disassembly scaffold. Background Art

[0002] Scaffolding is a working platform erected to ensure the smooth progress of various construction processes. It is divided into external scaffolding and internal scaffolding according to its location. When scaffolding is needed for short periods of time, portal scaffolding is widely used. Portal scaffolding gets its name from the "door" shape of its main frame. It consists of auxiliary components such as portal frames, diagonal braces, and footrests, forming a modular structure that facilitates quick assembly and disassembly. However, the above-mentioned technologies often have the following drawbacks: For example, the portal frame joints of existing portal scaffolding will wear and deform over long-term use, which can easily cause gaps in the joints. When the portal scaffolding is built too high, the accumulated gaps in the joints make it prone to shaking after erection. To increase its stability, using clips or bolts, which are commonly used in existing scaffolding, can make assembly and disassembly inconvenient. Furthermore, when dismantling the scaffolding, workers need to stand at the edge of the scaffolding to apply upward pulling force to the portal frame, which can easily endanger their lives.

[0003] To this end, the present invention provides a quick-disassembly scaffold. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0005] The technical solution adopted by the present invention to solve its technical problems is: the quick-detachable scaffolding described in the present invention includes a door frame and diagonal braces connected on both sides of the door frame, a connecting tube is fixedly provided on the top of the door frame, and a plug-in column coaxially plugged with the connecting tube is provided at the bottom, and a tensioning member that can elastically expand radially is provided at the end of the plug-in column. A control component is integrated in the climbing ladder of the door frame, which includes a lever-type pressure handle and a linkage mechanism pivoted by a first pin shaft. When the pressure handle is flipped upward, the tensioning member is driven by the linkage mechanism to expand radially and lock it to the inner wall of the connecting tube, forming a circumferential multi-point friction fixation. When the pressure handle is flipped downward, the tensioning member is driven to contract radially and generate an axial lifting force to achieve rapid separation, so that the plug-in column and the connecting tube are quickly separated.

[0006] Furthermore, the tensioning member includes an arc-shaped tensioning piece, the lower end of the plug-in column is evenly distributed with at least three mounting grooves along the circumference, and a second pin shaft is arranged in the mounting groove, several second pin shafts are rotatably arranged on the outside of the arc-shaped tensioning piece, and a pushing block is arranged on the inside of the arc-shaped tensioning piece, and a push-pull rod with a rectangular cross-section is arranged on the upper end of the pushing block, the plug-in column is provided with a socket matching the push-pull rod, and the linkage mechanism is connected to the push-pull rod.

[0007] Furthermore, when the tensioning member is expanding, the lower radial profile diameter of the arc-shaped tensioning piece is smaller than the end diameter of the pushing block.

[0008] Furthermore, the pushing block is divided into a pushing portion and a guiding portion, wherein the guiding portion has an inclined surface structure for guiding the arc-shaped tensioning piece to rotate outward.

[0009] Furthermore, the arc-shaped tensioning piece is made of modified polyvinyl chloride, and a stainless steel guide piece is embedded on the inner side wall of the arc-shaped tensioning piece.

[0010] Furthermore, the linkage mechanism includes a support sleeve, which is fixed in the climbing ladder of the door frame, and an ejection spring is provided on the side of the support sleeve close to the pressure handle, and a push rod is inserted in the ejection spring, and the outer side of the protruding end of the push rod is provided with an ejection groove matching the pressure handle, and the other end of the push rod is inserted into the inner side of the vertical rod of the door frame and is connected to a toothed push strip, a worm column is rotatably provided in the vertical rod of the door frame, and a tooth groove matching the toothed push strip is provided on the outer side of the upper end of the worm column, and a worm hole matching the worm column is provided on the upper end of the push-pull rod, and the climbing ladder of the door frame is slidingly provided with a blocking card for keeping the pressure handle pressed upward.

[0011] Furthermore, a storage groove matching the shape of the pressing handle is provided on the side wall of the climbing ladder of the door frame, and the pressing handle is flush with the outer contour of the climbing ladder when in the storage state.

[0012] Furthermore, the push rod is composed of a linkage part and a push-up part connected by threads, forming a length-adjustable structure.

[0013] Furthermore, a protective sleeve matching the connecting tube is slidably provided at the lower end of the door frame, and a guiding inclined surface is provided on the inner side of the lower end of the protective sleeve.

[0014] The beneficial effects of the present invention are as follows:

[0015] The quick-disassembly scaffold described in the present invention realizes radial expansion of the tensioning member and locking of the inner wall of the connecting tube by the cooperation of the provided lever-type pressure handle and the linkage mechanism, so that the two door frames connected in an upper and lower manner are more stable and firm. At the same time, the tensioning member radially contracts and separates from the inner wall of the connecting tube and lifts the door frame for rapid separation, thereby making it more convenient and quick to disassemble the scaffold after high-altitude operations, and the workers do not need to pull up the door frame with great force, making it safer for the workers when disassembling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a perspective view of the present invention;

[0018] Figure 2 It is a front view of the present invention;

[0019] Figure 3 It is a half-section view of the door frame of the present invention;

[0020] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0021] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle;

[0022] Figure 6 It is a three-dimensional diagram of the pushing block of the present invention;

[0023] Figure 7 is a three-dimensional diagram of the ejector pin of the present invention;

[0024] Figure 8 It is a three-dimensional diagram of a door frame in the present invention.

[0025] In the figure: 1. door frame; 2. diagonal support; 3. plug-in column; 4. tensioner; 5. connecting tube; 6. control assembly; 7. stainless steel guide plate; 8. protective sleeve; 9. ejection groove; 40. arc-shaped tensioner; 41. second pin shaft; 42. pushing block; 43. push-pull rod; 60. pressing handle; 61. first pin shaft; 62. linkage mechanism; 420. pushing part; 421. guide part; 620. support sleeve; 621. ejection spring; 622. ejector rod; 623. toothed push strip; 624. worm column; 625. blocking card; 6220. linkage part; 6221. ejecting part. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] Example 1: Figures 1 to 6 As shown, the door frame 1 described in the embodiment of the present invention is fixedly provided with a connecting tube 5 on the top, and the lower part of the inner hole of the connecting tube 5 is designed to be trumpet-shaped. At the same time, the depth of the trumpet-shaped hole and the length of the tensioner 4 in the relaxed state are 3 cm different. A plug-in column 3 is provided at the bottom, which is coaxially plugged with the connecting tube 5. The end of the plug-in column 3 is provided with a tensioner 4 that can elastically expand radially. A control component 6 is integrated in the climbing ladder of the door frame 1, and the control component 6 includes: a lever-type pressure handle 60, which is pivotally connected to the side wall of the climbing ladder through a first pin shaft 61, and a linkage mechanism 62, which connects the pressure handle 60 and the tensioner 4, wherein, when the pressure handle 60 is flipped upward, the tensioner 4 is driven to expand radially and lock it to the inner wall of the connecting tube 5 through the linkage mechanism 62, forming a circumferential multi-point friction fixation, and when the pressure handle 60 is flipped downward, the tensioner 4 is synchronously triggered to contract radially and generate an axial lifting force, so that the plug-in column 3 and the connecting tube 5 are quickly separated.

[0028] like Figure 3 and Figure 5 As shown, three arc-shaped tensioning pieces 40 are evenly distributed along the circumferential direction at the lower end of the plug-in column 3 and are pivotally fixed by the second pin shaft 41, and a pushing block 42 is suspended on the inner side of the arc-shaped tensioning piece 40. The upper end of the pushing block 42 is fixedly connected to a push-pull rod 43 with a rectangular cross section. The upper end of the push-pull rod 43 passes through the plug-in column 3 and is connected to the linkage mechanism 62, so that the push-pull rod 43 is driven up and down by the linkage mechanism 62, thereby driving the pushing block 42 to push the arc-shaped tensioning piece 40 to perform radial expansion movement. Through the friction between the arc-shaped tensioning piece 40 and the inner wall of the connecting tube 5, the connection between the upper and lower adjacent door frames 1 is made more stable.

[0029] like Figure 5 As shown, when the arc-shaped tensioning piece 40 is in the expanded and locked working state, the diameter of the lower end of the inner cavity formed by the three arc-shaped tensioning pieces 40 is designed to be smaller than the end diameter of the pushing block 42, thereby forming a locking curve to prevent the pushing block 42 from easily sliding out of the inner cavity formed by the three arc-shaped tensioning pieces 40.

[0030] like Figure 6 As shown, the pushing block 42 is divided into a pushing portion 420 and a guide portion 421. The guide portion 421 pushes the arc-shaped tensioning sheet 40 to rotate outward to facilitate the pushing portion 420 to squeeze into the inner side of several arc-shaped tensioning sheets 40, so that the pushing block 42 can squeeze into the inner side of the arc-shaped tensioning sheet 40 more comfortably.

[0031] like Figure 5 As shown, the arc-shaped tensioning piece 40 is made of modified polyvinyl chloride material, so that the arc-shaped tensioning piece 40 has a certain rigidity and a certain elastic deformation, and the inner wall of the arc-shaped tensioning piece 40 is inlaid with a stainless steel guide piece 7 to form a guide rail interface with a low friction coefficient, which effectively reduces the viscous resistance of the pushing block 42 during reciprocating motion and inhibits plastic creep, making the movement of the pushing block 42 smoother.

[0032] Example 2: Figures 3 to 8 As shown in Comparative Example 1, another embodiment of the present invention is:

[0033] The linkage mechanism 62 includes a support sleeve 620, which is fixed in the climbing ladder of the door frame 1. The support sleeve 620 is provided with an ejection spring 621 on the side close to the pressure handle 60. A push rod 622 is inserted into the ejection spring 621, and an ejection groove 9 matching the pressure handle 60 is provided on the outer side of the protruding end of the push rod 622. The other end of the push rod 622 is inserted into the inner side of the vertical rod of the door frame 1 and is connected with a toothed push strip 623. A worm column 624 is provided for rotation in the vertical rod of the door frame 1, and a tooth groove matching the toothed push strip 623 is provided on the outer side of the upper end of the worm column 624. A worm hole matching the worm column 624 is provided on the upper end of the push-pull rod 43. The climbing ladder of the door frame 1 is provided with a blocking block for keeping the pressure handle 60 pressed upward. The card 625 allows the pressure handle 60 to rotate upward by pressing the push rod 622, so that the push rod 622 drives the toothed push bar 623 to drive the worm column 624 to rotate, and the push-pull rod 43 spirally connected to the worm column 624 is linearly lifted, thereby expanding the tensioner 4 and fitting tightly against the inner wall of the connecting tube 5. On the contrary, when the pressure handle 60 rotates downward, one end of the pressure handle 60 is inserted into the ejection groove 9, so that the push rod 622 is pulled outward from the climbing ladder, thereby causing the worm column 624 to rotate in the opposite direction and the push-pull rod 43 to descend synchronously, so that the tensioner 4 no longer remains expanded. When the lower end of the pushing block 42 connected to the push-pull rod 43 contacts the bottom of the inner cavity of the connecting tube 5, the door frame 1 is lifted up and separated from the door frame 1 on the lower side under the reverse force.

[0034] like Figure 1 As shown, the climbing ladder of the door frame 1 is provided with a storage groove that matches the pressure handle 60, and the radial profile of the pressure handle 60 is the same as the profile of the climbing ladder of the door frame 1, so that after the scaffolding is built, the pressure handle is flush with the profile of the climbing ladder after being stored, thereby avoiding the risk of hooking of the pressure handle 60 on the workers working on the scaffolding.

[0035] like Figure 4 and Figure 7 As shown, the push rod 622 is divided into a linkage part 6220 and a push part 6221 fixedly connected to the tooth push strip 623, and the linkage part 6220 and the push part 6221 are connected by a threaded connection, so that the length of the push rod 622 can be adjusted, so that it can be adjusted according to the actual use status of the tensioner 4 in the later stage, so that the tensioner 4 can have a larger static friction force with the inner wall of the connecting tube 5.

[0036] like Figure 8 As shown, a protective sleeve 8 is slidably connected to the lower end of the door frame 1, wherein the inner diameter of the protective sleeve 8 is equal to the outer diameter of the upper end of the connecting tube 5, and the inner side of the lower end of the protective sleeve 8 is provided with a guiding inclined surface, so that the protective sleeve 8 and the connecting tube 5 can be docked during the scaffolding construction process, thereby facilitating the alignment of the tensioning member 4 with the inner hole of the connecting tube 5 for insertion more conveniently and quickly, and at the same time, the plug-in column 3 and the tensioning member 4 are shielded and protected when the door frame 1 is idle.

[0037] Working principle: When building, align the door frame 1 to be built with the connecting tube 5 at the upper end of the door frame 1 on the lower side, and use the deadweight of the door frame 1 to insert the tensioner 4 and the plug-in column 3 at the lower part of the door frame 1 into the connecting tube 5, then pull the pressure handle 60 upward, and use the lever formed by the pressure handle 60 with the first pin shaft 61 as the fulcrum to press the push rod 622, so that the push rod 622 drives the tooth push strip 623 to drive the worm column 624 to rotate, and makes the push-pull rod 43 spirally connected to the worm column 624 linearly lifted, thereby making the tensioner 4 expand and fit tightly against the inner wall of the connecting tube 5, making the connection of the door frame 1 more stable.

[0038] During disassembly, the staff will use both hands to pull the pressure handle 60 downward. When the pressure handle 60 rotates 180°, the end protrusion of the pressure handle 60 will be inserted into the ejection groove 9. By inserting one end of the pressure handle 60 into the ejection groove 9, the ejector rod 622 is pulled outward from the climbing ladder, and then the worm column 624 rotates in the opposite direction while the push-pull rod 43 drops synchronously, so that the tensioner 4 no longer remains expanded. When the lower end of the pushing block 42 connected to the push-pull rod 43 contacts the bottom of the inner cavity of the connecting tube 5, the door frame 1 is lifted up under the reverse force. Finally, when the staff's hands grasp the climbing ladder of the door frame 1, the door frame 1 is separated from the scaffolding on the lower side and dismantled.

[0039] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-disassembly scaffold comprising a door frame (1) and diagonal braces (2) connected to both sides of the door frame (1), characterized in that: The door frame (1) is fixed with a connecting tube (5) on the top, and a plug-in column (3) coaxially plugged with the connecting tube (5) is provided at the bottom. A tensioning member (4) capable of radial elastic expansion is provided at the end of the plug-in column (3). A control assembly (6) is integrated in the climbing ladder of the door frame (1), comprising a lever-type pressure handle (60) and a linkage mechanism (62) pivoted by a first pin shaft (61). When the pressure handle (60) is flipped upward, the linkage mechanism (62) drives the tensioning member (4) to expand radially and lock it to the inner wall of the connecting tube (5), forming a circumferential multi-point friction fixation. When the pressure handle (60) is flipped downward, the tensioning member (4) is driven to contract radially and generate an axial lifting force to achieve rapid separation, so that the plug-in column (3) and the connecting tube (5) are quickly separated. The tensioning member (4) includes an arc-shaped tensioning piece (40), the lower end of the plug-in column (3) is uniformly distributed with at least three mounting grooves along the circumferential direction, and a second pin shaft (41) is provided in the mounting groove, a plurality of the second pin shafts (41) are externally rotatably provided with an arc-shaped tensioning piece (40), and a plurality of the arc-shaped tensioning pieces (40) are provided with a pushing block (42) on the inner side, and a push-pull rod (43) with a rectangular cross section is provided at the upper end of the pushing block (42), the plug-in column (3) is provided with a socket matching the push-pull rod (43), and the linkage mechanism (62) is connected to the push-pull rod (43); When the tensioning member (4) is in expansion operation, the lower radial profile diameter of the arc-shaped tensioning piece (40) is smaller than the end diameter of the pushing block (42).

2. The quick-release scaffold according to claim 1, characterized in that: The pushing block (42) is divided into a pushing portion (420) and a guiding portion (421), wherein the guiding portion (421) has an inclined surface structure for guiding the arc-shaped tensioning piece (40) to rotate outward.

3. The quick-disassembly scaffold according to claim 2, characterized in that: The arc-shaped tensioning piece (40) is made of modified polyvinyl chloride, and a stainless steel guide piece (7) is embedded in the inner side wall of the arc-shaped tensioning piece (40).

4. The quick-disassembly scaffold according to claim 3, characterized in that: The linkage mechanism (62) includes a support sleeve (620), the support sleeve (620) is fixed in the climbing ladder of the door frame (1), and a push-out spring (621) is provided on the side of the support sleeve (620) close to the pressing handle (60), a push rod (622) is inserted into the push-out spring (621), and a push-out groove (9) matching the pressing handle (60) is provided on the outer side of the extended end of the push rod (622), and the other end of the push rod (622) is inserted into the door frame (1). The inner side of the vertical rod portion of the frame (1) is connected to a toothed push strip (623), a worm column (624) is rotatably provided in the vertical rod of the door frame (1), and a toothed groove matching the toothed push strip (623) is provided on the outer side of the upper end of the worm column (624), a worm hole matching the worm column (624) is provided on the upper end of the push-pull rod (43), and a blocking card (625) for keeping the pressing handle (60) pressed upward is slidably provided on the climbing ladder of the door frame (1).

5. The quick-disassembly scaffold according to claim 4, characterized in that: The side wall of the climbing ladder of the door frame (1) is provided with a receiving groove matching the outer shape of the pressing handle (60), and the pressing handle (60) is flush with the outer contour of the climbing ladder when in the stored state.

6. The quick-disassembly scaffold according to claim 5, characterized in that: The push rod (622) is composed of a linkage portion (6220) and a push portion (6221) connected by threads, forming a length-adjustable structure.

7. The quick-release scaffold according to claim 6, characterized in that The lower end of the door frame (1) is slidably provided with a protective sleeve (8) that matches the connecting tube (5), and the lower end of the inner hole of the protective sleeve (8) is provided with a guiding inclined surface.

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