Quick-release scaffold

Abstract

The invention belongs to the technical field of scaffolds, and particularly relates to a quick-release scaffold which comprises an n-shaped frame, a connecting cylinder is fixedly arranged at the top of the n-shaped frame, an inserting column coaxially matched with the connecting cylinder in an inserting mode is arranged at the bottom of the n-shaped frame, a tensioning piece capable of elastically expanding in the radial direction is arranged at the tail end of the inserting column, and a control assembly is integrated in a climbing ladder of the n-shaped frame. The device comprises a lever type pressing handle and a linkage mechanism which are pivoted through a first pin shaft, when the pressing handle overturns upwards, a tensioning piece is driven by the linkage mechanism to expand in the radial direction and be locked to the inner wall of a connecting cylinder, circumferential multi-point friction fixing is formed, and when the pressing handle overturns downwards, the tensioning piece is driven to contract in the radial direction and generate axial jacking force to achieve rapid separation. The inserting column is quickly separated from the connecting cylinder; by means of the structural cooperation, connection between the n-shaped frames which are connected up and down is more stable, shaking caused by abrasion of the inserting-connecting parts of the scaffold is avoided, and meanwhile the disassembling speed and safety of the scaffold are improved.

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 set up to ensure the smooth progress of each construction process. It is divided into external scaffolding and internal scaffolding according to the location of the scaffolding. Among them, when the scaffolding is needed in the short term, the portal scaffolding will be used in large quantities. The portal scaffolding is named because the main frame is in the shape of a "door". It is composed of auxiliary components such as a portal frame, a diagonal brace and a foot pedal to form a modular structure, which is convenient for quick assembly and disassembly. However, the above technology often has the following defects: For example, the existing portal scaffolding will wear and deform in the long-term use of the portal frame plug-in part, which is easy to cause a gap in the plug-in part. When the portal scaffolding is built too high, the accumulation of the gap in the plug-in part makes the scaffolding easy to shake after it is built. If the buckle or bolt fixing commonly used in the existing scaffolding is used to increase its stability, it will cause inconvenience in assembly and disassembly. At the same time, when the staff dismantles the scaffolding, the staff needs to stand on the edge of the scaffolding to apply an upward pull-out force to the portal frame, which is easy to endanger the life safety of the staff.

[0003] To this end, the present invention provides a quick-detachable 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: a quick-detachable scaffolding described in the present invention includes a door frame and diagonal braces connected to 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, and a control component is integrated in the climbing ladder of the door frame, including 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 to expand radially and lock to the inner wall of the connecting tube through the linkage mechanism, forming a circumferential multi-point friction fixation, and 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 installation grooves along the circumferential direction, and a second pin shaft is arranged in the installation groove, a plurality of the second pin shafts are rotatably arranged on the outside with an arc-shaped tensioning piece, and a pushing block is arranged on the inner side of the arc-shaped tensioning piece, 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 in expansion operation, 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 inlaid 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 arranged on the side of the support sleeve close to the pressure handle, a push rod is inserted in the ejection spring, and an ejection groove matching the pressure handle is provided on the outer side of the protruding end of the push rod, the other end of the push rod is inserted into the inner side of the vertical rod of the door frame and is connected with a toothed push strip, a worm column is rotatably arranged 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, a worm hole matching the worm column is provided on the upper end of the push-pull rod, and a blocking card for keeping the pressure handle pressed upward is slidably provided on the climbing ladder of the door frame.

[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-moving 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: The quick-disassembly scaffolding described in the present invention realizes radial expansion of the tensioning member and locking of the inner wall of the connecting tube through the cooperation of the arranged lever-type pressure handle and the linkage mechanism, so that the two door frames connected by upper and lower plug-in connection 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 quick separation, thereby making it more convenient and quick to disassemble the scaffolding after aerial work, and the staff does not need to pull up the door frame with great force, making it safer for the staff to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 is a stereogram of the present invention; Figure 2 It is a front view of the present invention; Figure 3It is a half-section view of the door frame of the present invention; Figure 4 yes Figure 3 A partial enlarged view of the middle part; Figure 5 yes Figure 3 A partial enlarged view of point B in the middle; Figure 6 is a three-dimensional diagram of a pushing block in the present invention; Figure 7 is a stereoscopic diagram of the ejector rod in the present invention; Figure 8 It is a three-dimensional diagram of a door frame in the present invention.

[0017] 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. supporting 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

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] Embodiment 1: Figures 1 to 6 As shown, a connecting tube 5 is fixedly provided on the top of the door frame 1 described in the embodiment of the present invention, and the lower part of the inner hole of the connecting tube 5 is designed to be trumpet-shaped, and the depth of the trumpet-shaped hole is 3 cm different from the length of the tensioner 4 in the relaxed state, and a plug-in column 3 is provided at the bottom to be coaxially plugged with the connecting tube 5, and a tensioner 4 that can be elastically expanded radially is provided at the end of the plug-in column 3. A control component 6 is integrated in the climbing ladder of the door frame 1, and the control component 6 includes: a lever-type pressing 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 pressing handle 60 and the tensioner 4, wherein when the pressing handle 60 is flipped upward, the tensioner 4 is driven to expand radially and lock on the inner wall of the connecting tube 5 through the linkage mechanism 62, forming a circumferential multi-point friction fixation, and when the pressing 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.

[0020] like Figure 3 and Figure 5As shown, three arc-shaped tensioning pieces 40 pivotally fixed by a second pin shaft 41 are evenly distributed along the circumferential direction at the lower end of the plug-in column 3, 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 a 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, and 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.

[0021] 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.

[0022] like Figure 6 As shown, the pushing block 42 is divided into a pushing portion 420 and a guiding portion 421. The guiding 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.

[0023] 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.

[0024] Embodiment 2: Figures 3 to 8 As shown in Comparative Example 1, another embodiment of the present invention is: 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 in 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 rotatably provided 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 device for keeping the pressure handle 60 pressed upward. 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 closely with 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.

[0025] like Figure 1 As shown, the climbing ladder of the door frame 1 is provided with a storage groove matching the pressing handle 60, and the radial profile of the pressing 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 pressing handle is flush with the profile of the climbing ladder after being stored, thereby avoiding the risk of hooking of the pressing handle 60 to the workers working on the scaffolding.

[0026] like Figure 4 and Figure 7 As shown, the push rod 622 is divided into a linkage part 6220 and a push part 6221 which are fixedly connected to the tooth push strip 623, and a threaded connection is adopted between the linkage part 6220 and the push part 6221, 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.

[0027] 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 arranged to be in the shape of a guiding slope, so that the protective sleeve 8 and the connecting tube 5 can be docked during the scaffolding process, thereby facilitating the insertion of the tensioner 4 into the inner hole of the connecting tube 5 more conveniently and quickly, and at the same time, the plug-in column 3 and the tensioner 4 are shielded and protected when the door frame 1 is idle.

[0028] 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, so that the tensioner 4 expands and fits tightly against the inner wall of the connecting tube 5, making the connection of the door frame 1 more stable.

[0029] During disassembly, the staff will use both hands to pull the pressure handle 60 downward. After 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 maintains expansion. 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 hold the climbing ladder of the door frame 1, the door frame 1 is separated from the scaffolding on the lower side and removed.

[0030] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. 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.

[0031] 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 should not be understood as limiting the scope of protection of the present invention.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached 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: A connecting tube (5) is fixedly provided on the top of the door frame (1), and a plug-in column (3) coaxially plugged with the connecting tube (5) is provided on 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 pressing handle (60) and a linkage mechanism (62) pivotally connected via a first pin shaft (61). When the pressing handle (60) is flipped upward, the tensioning member (4) is driven to expand radially and be locked to the inner wall of the connecting tube (5) via the linkage mechanism (62), thereby forming a circumferential multi-point friction fixation. When the pressing handle (60) is flipped downward, the tensioning member (4) is driven to contract radially and generate an axial lifting force to achieve rapid separation, thereby enabling the plug-in column (3) to be quickly separated from the connecting tube (5).

2. A quick-disassembly scaffold according to claim 1, characterized in that: The tensioning member (4) comprises an arc-shaped tensioning piece (40), the lower end of the plug-in column (3) is evenly distributed with at least three mounting grooves along the circumferential direction, and a second pin shaft (41) is arranged in the mounting groove, a plurality of the second pin shafts (41) are rotatably arranged with an arc-shaped tensioning piece (40) outside, and a plurality of the arc-shaped tensioning pieces (40) are arranged with a pushing block (42) inside, and a push-pull rod (43) with a rectangular cross section is arranged 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).

3. A quick-disassembly scaffold according to claim 2, characterized in that: 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).

4. A quick-disassembly scaffold according to claim 3, 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.

5. A quick-disassembly scaffold according to claim 4, characterized in that: The arc-shaped tensioning piece (40) is made of modified polyvinyl chloride, and a stainless steel guide piece (7) is inlaid on the inner side wall of the arc-shaped tensioning piece (40).

6. A quick-disassembly scaffold according to claim 5, characterized in that: The linkage mechanism (62) comprises a support sleeve (620), the support sleeve (620) being fixed in a climbing ladder of a door frame (1), an ejection spring (621) being arranged on a side of the support sleeve (620) close to the pressing handle (60), an ejection rod (622) being inserted into the ejection spring (621), and an ejection groove (9) matching the pressing handle (60) being arranged on the outer side of the protruding end of the ejection rod (622), and the other end of the ejection rod (622) being inserted into the door frame (1). A toothed push strip (623) is connected to the inner side of the vertical rod portion of the frame (1); a worm column (624) is rotatably arranged in the vertical rod of the door frame (1); 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 arranged on the climbing ladder of the door frame (1).

7. The quick-disassembly scaffold according to claim 6, characterized in that: The side wall of the climbing ladder of the door frame (1) is provided with a storage groove matching the outer shape of the pressing handle (60); the pressing handle (60) is flush with the outer contour of the climbing ladder when in the storage state.

8. The quick-disassembly scaffold according to claim 7, characterized in that: The push rod (622) is composed of a linkage part (6220) and a push part (6221) connected by threads, forming a length-adjustable structure.

9. The quick-disassembly scaffold according to claim 8, characterized in that A protective sleeve (8) matching the connecting tube (5) is slidably provided at the lower end of the door frame (1), and a guiding inclined surface is provided at the lower end of the inner hole of the protective sleeve (8).

Images