A transfer trolley for indoor scaffolding and a method of use

Abstract

The application discloses a transfer trolley of indoor scaffold, which comprises a moving bottom plate, a push-pull handrail and a scissor support assembly, two guide beam bodies are arranged in parallel on the two sides of the moving bottom plate, and a support beam body is arranged above the guide beam bodies; the scissor support assembly comprises two groups of parallel arranged scissor supports, and each scissor support is composed of two groups of cross arranged support plates; the front ends of the two groups of support plates are hingedly connected with the guide beam bodies and the support beam bodies respectively, the rear ends of the two groups of support plates are slidably connected with the guide beam bodies and the support beam bodies, and the rear part of the guide beam body is provided with a limiting structure for controlling the displacement of the scissor support assembly; the rear side of the moving bottom plate is provided with a driving pedal for driving the scissor support assembly to lift; two support angle steels are arranged in parallel on the support beam body, and the scaffold footboards are detachably arranged between the two support angle steels. The application can conveniently move and transfer the scaffold, the lifting position of the scissor support assembly is controllable, the requirements of different scaffold jacking heights can be met, the structure is simple, the cost is low, and the work efficiency is high.

Description

Technical Field

[0001] This invention relates to scaffolding auxiliary devices, and more particularly to a transfer trolley for indoor scaffolding and its method of use. Background Technology

[0002] During interior decoration or equipment installation, workers often need to work at heights. To facilitate operation, auxiliary tools such as scaffolding and ladders are essential. Indoor scaffolding is an indispensable tool for interior construction and installation. Currently, scaffolding on the market is mainly made of galvanized steel pipes and includes ladder-type and bed-type scaffolding. Generally, it is divided into two types: fixed-frame and movable-frame. While this type of scaffolding solves the problem of workers working at heights to some extent, the construction range of fixed-frame scaffolding is limited, requiring several workers to frequently move and change positions, which is very inconvenient for large-scale or wide-area construction work. Movable-frame scaffolding has wheels installed under the uprights, which makes it easy to move, but it is also prone to shifting when working in a fixed location, especially on uneven ground, where the scaffolding is prone to slipping and falling accidents. Moreover, movable-frame indoor scaffolding can also create a certain psychological burden for workers, affecting work efficiency. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a transfer trolley and its usage method that enable convenient and free movement of fixed scaffolding, thereby facilitating scaffolding movement and increasing work efficiency.

[0004] Technical Solution: The present invention discloses a transfer trolley for indoor scaffolding, comprising a movable base plate, push-pull handrails, and a scissor brace assembly. Two guide beams are arranged parallel to each other on both sides of the movable base plate, and a support beam is correspondingly arranged above the guide beams. The scissor brace assembly includes two sets of parallel scissor braces, each composed of two sets of cross-arranged support plates. The front ends of the two sets of support plates are hinged to the guide beams and support beams, respectively, and their rear ends are slidably connected to the guide beams and support beams. A limiting structure is provided at the rear of the guide beams to restrict the backward movement of the scissor brace assembly. A drive pedal for raising and lowering the scissor brace assembly is provided at the rear of the movable base plate. Two supporting angle steels are arranged parallel to each other on the support beams, and the scaffolding planks are detachably installed between the two supporting angle steels.

[0005] Preferably, the two sets of scissor braces are connected to the two ends and the center of the support plate by hinged connecting rods. This configuration of the scissor brace assembly has good overall structural integrity and greater load-bearing capacity and stability.

[0006] Preferably, the guide beam and support beam are U-shaped channel steel; the front side of the guide beam and support beam is provided with a fixed foot block that is hinged to the scissor brace, and the rear side is provided with a sliding foot block that is hinged to the scissor brace. The use of sliding foot blocks in conjunction with the channel-shaped guide beam and support beam structure can better restrict the moving end of the scissor brace assembly, further improving the stability of the scissor brace assembly during lifting or lowering.

[0007] Preferably, the guide beam and support beam have slots along their length on both side walls; the bottom surface of the sliding foot block has a groove corresponding to the slot; and the limiting structure is an anti-reverse component mounted on the guide beam. This structure provides lower friction for the sliding foot block during sliding and better limits its position.

[0008] Preferably, the anti-reverse assembly includes a wedge-shaped slider corresponding to the sliding foot block, a guide post at the bottom of the wedge-shaped slider, and a retaining strip at the bottom end of the guide post; a guide groove is provided on the lower side of the U-shaped groove of the guide beam, and the guide groove is connected to the U-shaped groove through a guide slot; several positioning countersunk holes for the retaining strip to engage are provided at equal intervals at the bottom of the guide groove; the wedge-shaped slider moves forward or backward in the U-shaped groove along the guide slot via the guide post. During operation, the wedge-shaped slider is pulled upward, and the wedge-shaped slider is engaged in the guide slot via the guide post. At this time, the wedge-shaped slider can be pushed forward or backward along the U-shaped groove, and the retaining strip moves forward or backward accordingly along the guide groove; when the scissor lift assembly is raised or lowered to a suitable position, downward pressure is applied to the wedge-shaped slider, and the retaining strip falls into the nearest positioning countersunk hole, thereby fixing the wedge-shaped slider and limiting the movement of the movable end of the scissor lift assembly.

[0009] Preferably, the sliding foot block is slidably disposed within the groove of the guide beam and the support beam; the guide beam is provided with a plurality of pin holes at equal intervals on the rear side of the sliding foot block; the limiting structure is a limiting pin that penetrates and is inserted into the pin hole. This type of limiting structure can conveniently limit the position of the scissor brace assembly after the scaffolding has been lifted, and the opening degree and lifting height of the scissor brace assembly are controllable.

[0010] Preferably, the supporting angle steel is provided with a plurality of positioning holes and T-shaped pins disposed within the positioning holes. This configuration of the supporting angle steel facilitates the positioning and fixing of the scaffold boards, thereby ensuring convenient access to the scaffold boards.

[0011] A method for using an indoor scaffolding transfer trolley includes the following steps:

[0012] Step 1: Move the transfer trolley to the center under the scaffold, remove the upper scaffold plank, flip the scaffold plank over and fix it to the supporting angle steel with T-pins, and fasten the buckle lugs at the four corners of the two ends of the scaffold plank to the horizontal bars at both ends of the lower scaffold.

[0013] Step 2: Step on the foot pedal to drive the movable end of the scissor lift assembly forward, which in turn lifts the support beam and the scaffold boards on it, thereby pushing the scaffold to the appropriate position; the position of the movable end of the scissor lift assembly is restricted by limit pins or anti-reverse components;

[0014] Step 3: Move the transfer trolley to the designated area;

[0015] Step 4: Pull out the limiting pin on the rear side of the guide beam at the movable end of the scissor brace assembly or move the anti-reverse assembly backward to release the limiting on the movable end of the scissor brace assembly. The scissor brace assembly and its upper scaffolding will descend under the action of gravity, and the scaffolding will descend to the designated area.

[0016] Step 5: Pull out the T-pins, lift the scaffold boards off the supporting angle steel and flip them over to fasten them onto the upper horizontal bar of the scaffold, and push the transfer trolley to move it out from under the scaffold.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. It can be easily moved and transported, especially suitable for large-area house renovation and equipment installation scenarios; 2. The lifting position of the scissor brace component is controllable, meeting the requirements for different scaffolding lifting heights; 3. It has a simple structure, low cost, reduces the labor intensity of workers, and has high work efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the device of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure of the transfer scaffolding transported by the transfer trolley;

[0020] Figure 3 yes Figure 1 Schematic diagram of the installation status of the guide beam and anti-reverse assembly;

[0021] Figure 4 yes Figure 3 Enlarged schematic diagram of the installation status of the single-sided guide beam and anti-reverse assembly;

[0022] Figure 5 yes Figure 4 Cross-sectional view of the guide beam along its length;

[0023] Figure 6 yes Figure 4 Cross-sectional view of the guide beam along its width;

[0024] Figure 7 This is a schematic diagram of the second embodiment of the device of the present invention;

[0025] Figure 8 yes Figure 7 A schematic diagram of the structure of the transfer scaffolding transported by the transfer trolley;

[0026] Figure 9 yes Figure 7 Schematic diagram of the installation status of the guide beam and the limiting pin. Detailed Implementation

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1-2 As shown, the present invention discloses a transfer trolley for indoor scaffolding. The transfer trolley 100 includes a movable base plate 1, a push-pull handrail 2, and a scissor brace assembly 3. The push-pull handrail 2 is fixedly installed at the rear end of the movable base plate 1. Guide beams 4 are arranged parallel to each guide beam 4 on both sides of the movable base plate 1 along its length direction. Support beams 5 are arranged parallel to and corresponding to each guide beam 4 on the upper part of the movable base plate 1. Both the guide beams 4 and the support beams 5 are U-shaped channel steels with a channel-shaped receiving cavity inside. The scissor brace assembly 3 includes two sets of parallel scissor braces 31. The scissor braces 31 are composed of two cross-arranged support plates 32. The two sets of scissor braces 31 are connected to the two ends and the center of the support plates by a hinged connecting rod 33, so that the scissor brace assembly structure has good integrity and greater load-bearing capacity and stability. The scissor brace assembly 3 has four sets of free ends formed by four sets of hinged connecting rods 33 at both ends of the two sets of support plates. The guide beam 4 and support beam 5 have fixed foot blocks 10 hinged to the two free ends of the front side of the scissor brace assembly 3 on their front sides. The guide beam 4 and support beam 5 have sliding foot blocks 11 hinged to the two free ends of the rear side of the scissor brace assembly 3 on their rear sides. The two free ends of the rear side of the scissor brace assembly slide back and forth along the guide beam and support beam via the sliding foot blocks. The movable base plate 1 has a drive pedal 8 on its rear side for driving the scissor brace assembly to rise and fall. The drive pedal 8 includes a drive link 81 connected to the rear lower hinged connecting rod of the scissor brace 31 and a foot pedal 82 connected to the drive link. Stepping on the foot pedal drives the drive link to push the sliding foot blocks forward, realizing the lifting movement of the scissor brace assembly. When the external force applied to the foot pedal disappears, the scissor brace assembly can push the sliding foot blocks backward along the guide beam and support beam based on its own weight or the weight of its load.

[0029] Two sets of supporting beams 5 are equipped with two parallel supporting angle steels 6 on their front and rear sides. The spacing between the two sets of supporting angle steels is the same as the width of the scaffold board 9. The supporting angle steels 6 are provided with several positioning holes and T-shaped pins 17 installed in the positioning holes. Positioning holes are opened on both sides of the scaffold board 9. The scaffold board can be installed and removed between the two sets of supporting angle steels through the T-shaped pins. The scaffold board is provided with buckle ears 19 at the four corners. When the scaffold is in working condition, the scaffold board is fastened to the horizontal bars at both ends of the upper layer of the scaffold through the buckle ears at the four corners. When the scaffold needs to be moved, the scaffold board is removed and flipped over. The buckle ears 19 open upwards and can be fastened to the horizontal bars 20 at both ends of the lower layer of the scaffold 18, connecting the scaffold board and the supporting angle steel 6. The transfer trolley can then support the scaffold through the scaffold board to realize the transfer of the scaffold.

[0030] In one embodiment of this application, such as Figure 3-6 As shown, the guide beam 4 is provided with a limiting structure 7 on the rear side of the sliding foot block. The guide beam 4 and the support beam 5 have slots 13 along their length on both side walls of the groove; the bottom surface of the sliding foot block 11 has a groove 14 corresponding to the slot 13. The sliding foot block is engaged with the guide beam or support beam through the groove. The sliding foot block has less friction and better stability during the sliding process along the guide beam or support beam, which not only makes the scissor lift assembly lift more freely, but also makes the scissor lift assembly more stable. The limiting structure 7 is a backstop assembly 15 that is slidably disposed in the groove of the guide beam 4. The backstop assembly 15 includes a wedge-shaped slider 151, a guide post 152 at the bottom of the wedge-shaped slider 151, and a locking strip 153 at the bottom end of the guide post 152. A guide groove 42 is provided on the lower side of the U-shaped groove 41 of the guide beam 4, and the guide groove 42 is connected to the U-shaped groove 41 through a guide locking groove 44. Several positioning countersunk holes 43 for locking strips are provided at equal intervals at the bottom of the guide groove 42. The wedge-shaped slider 151 moves forward or backward in the U-shaped groove along the guide locking groove 44 through the guide post 152. During operation, the wedge-shaped slider is pulled upwards, and the wedge-shaped slider is secured in the guide slot through the guide post. At this time, the wedge-shaped slider can be pushed forward or backward along the U-shaped groove, and the locking strip moves forward or backward accordingly along the guide groove. When the scissor lift assembly is raised or lowered to the appropriate position, downward pressure is applied to the wedge-shaped slider. When the wedge-shaped slider is pushed forward or backward, the locking strip can fall into the nearest positioning countersunk hole, thereby fixing the wedge-shaped slider and limiting the movement of the scissor lift assembly.

[0031] The wedge-shaped slider 151 has several positioning crossbeams 156 along its front inclined surface 155. During the forward or backward movement of the wedge-shaped slider, the rear end of the sliding foot block can be correspondingly engaged with the positioning crossbeams on the front inclined surface of the wedge-shaped slider. The wedge-shaped slider can provide stable support for the sliding foot block and decompose the force exerted by the sliding foot block on the inclined surface into horizontal and vertical components. The vertical component can press the wedge-shaped slider into the U-shaped groove of the guide beam and make the locking strip firmly locked in the positioning countersunk hole 43, thereby improving the limiting effect of the wedge-shaped slider on the sliding foot block.

[0032] In another embodiment of this application, such as Figure 7-9 As shown, the limiting structure 7 can also adopt a limiting pin 12 structure. The sliding foot block 11 is slidably disposed in the groove of the guide beam 4 and the support beam 5. The guide beam 4 has several pin holes 21 evenly spaced on the two side walls on the rear side of the sliding foot block 11. The limiting pin 12 is inserted through and inserted into the pin hole 21 to limit the sliding foot block 11. During operation, when the worker steps on the foot pedal to drive the sliding foot block 11 forward, the scissor brace assembly lifts the scaffolding to a certain height off the ground. The limiting pin 12 is inserted into the nearest pin hole 21 of the sliding foot block. Then, the external force on the foot pedal is released. Under the action of its own weight and the weight of the scaffolding, the sliding foot block 11 slides backward along the guide beam 4 for a certain distance and then gets stuck at the front end of the limiting pin 12. That is, the limiting pin blocks the sliding foot block, and the scissor brace assembly provides stable support for the scaffolding. After the transfer trolley completes the transfer of the scaffolding, stepping on the foot pedal drives the scissor lift assembly to a certain distance, causing the sliding foot block to move forward a short distance, releasing the pressure on the limit pin, pulling out the limit pin and inserting it into the appropriate pin hole 21 at the rear end of the guide beam. Then, gradually releasing the pressure on the foot pedal, the scissor lift assembly, under the weight of the scaffolding above, gradually slides the sliding foot block backward along the guide beam to the limit pin. At this point, the scaffolding stably descends to the ground. During the scaffolding descent, the limit pin inserts into the appropriate pin hole, limiting the backward movement of the sliding foot block to prevent the scissor lift assembly from descending to the lowest point, maintaining a certain lifting height of the scissor lift assembly. This allows for a reduction in the lifting stroke of the scissor lift assembly during the next transfer, thereby further reducing the workload of the workers.

[0033] The working principle or method of this invention:

[0034] The method of using the scaffolding transfer trolley of the present invention uses the anti-reverse component structure as an example of the limiting structure.

[0035] First, move the transfer trolley to the center below the scaffolding 18, remove the upper scaffolding board 9 from the scaffolding 18, flip it over, and clamp the scaffolding board 9 between the two sets of supporting angle steel 6. Use T-shaped pins 17 to position and connect the scaffolding board to the supporting angle steel 6, and fasten the buckles 19 at the four corners of the two ends of the scaffolding board 9 to the lower side of the horizontal bars 20 at both ends of the lower layer of the scaffolding 18.

[0036] Secondly, stepping on the foot pedal 82 drives the movable end of the scissor lift assembly 3 forward. During this process, the sliding foot block 11 moves forward along the guide beam and support beam, thereby lifting the support beam 5 and the scaffold boards 9 on it, and thus pushing the scaffold 18 to a suitable height off the ground. By pulling the pull ring 154 on the rear side of the wedge slider, the wedge slider 151 makes a slight upward displacement. The wedge slider is engaged in the guide slot 44 by the guide post 152. At this time, the wedge slider can be pushed forward along the U-shaped groove. The locking bar moves forward along the guide groove accordingly. When the scissor brace assembly is raised to the appropriate position, downward pressure is applied to the wedge slider, and the locking bar falls into the positioning countersunk hole 43 closest to the sliding foot block 11, thus fixing the wedge slider. Then, the push on the foot pedal is released, and the scissor brace assembly falls back down under the gravity of the upper scaffold. The sliding foot block 11 moves back a certain distance along the guide beam and abuts against the inclined surface 155 of the wedge slider, thereby limiting the position of the sliding foot block.

[0037] Next, the transfer trolley is used to move scaffolding 18 to the designated area.

[0038] Next, stepping on the foot pedal drives the scissor lift assembly to a certain extent, causing the sliding foot block to move forward a distance along the guide beam, relieving pressure on the wedge slider. Then, by pulling the pull ring 154 on the rear side of the wedge slider, the wedge slider 151 moves upward a certain displacement. The wedge slider is then engaged in the guide slot 44 by the guide post 152. At this time, the wedge slider can be pulled back along the U-shaped groove, and the locking strip moves back along the guide groove accordingly. When the scissor lift assembly descends to the appropriate position, downward pressure is applied to the wedge slider, and the locking strip falls into the positioning countersunk hole 43 closest to the sliding foot block 11, thus fixing the wedge slider. Then, releasing the push of the foot pedal, the scissor lift assembly falls back down under its own gravity, and the sliding foot block 11 moves back along the guide beam until it abuts against the inclined surface 155 of the wedge slider, thereby limiting the position of the sliding foot block. At this time, the scaffolding has been stably lowered to the specific area, and the scissor lift assembly has also descended to separate from the scaffolding.

[0039] Finally, pull out the T-pins, lift the scaffold board 9 from the supporting angle steel and flip it to fasten it onto the upper horizontal bar 20 of the scaffold 18, and push the transfer trolley to move it out from under the scaffold.

Claims

1. A transfer trolley for indoor scaffolding, comprising a movable base plate (1), push-pull handrails (2), and a scissor brace assembly (3), characterized in that, The movable base plate (1) has two parallel guide beams (4) on both sides, and a support beam (5) is provided above the guide beams (4); the scissor brace assembly (3) includes two sets of parallel scissor braces (31), which are composed of two sets of cross-arranged support plates (32); the front ends of the two sets of support plates (32) are hinged to the guide beams (4) and the support beams (5) respectively, and the rear ends are slidably connected to the guide beams (4) and the support beams (5); the rear of the guide beams (4) is provided with a limiting structure (7) to restrict the scissor brace assembly from moving backward; the movable base plate (1) has a drive pedal (8) for driving the scissor brace assembly to move up and down; two support angle steels (6) are parallel on the support beams (5), and the support angle steels (6) are provided with several positioning holes and T-shaped pins (17) in the positioning holes; the scaffolding boards (9) are disassembled and installed between the two support angle steels (6); The limiting structure (7) is a backstop assembly (15) provided on the guide beam (4). The backstop assembly (15) includes a wedge-shaped slider (151) corresponding to the sliding foot block (11). The bottom of the wedge-shaped slider (151) is provided with a guide post (152), and the bottom end of the guide post (152) is provided with a horizontal locking strip (153). The guide slide groove (42) is provided on the lower side of the U-shaped groove (41) of the guide beam (4), and the guide slide groove (42) is connected to the U-shaped groove (41) through the guide locking groove (44). The bottom of the guide slide groove (42) is provided with a number of positioning countersunk holes (43) for locking the locking strip. The wedge-shaped slider (151) moves forward or backward in the U-shaped groove along the guide locking groove (44) through the guide post (152). The wedge-shaped slider (151) is provided with a number of positioning transverse ribs (156) along its front inclined surface (155).

2. The transfer trolley for indoor scaffolding according to claim 1, characterized in that, The two sets of scissor braces (31) are connected to the two ends and the center of the support plate by a hinged connecting rod (33).

3. The transfer trolley for indoor scaffolding according to claim 1, characterized in that, The guide beam (4) and the support beam (5) are U-shaped channel steels; the guide beam (4) and the support beam (5) are provided with a fixed foot block (10) hinged to the scissor brace (31) on the front side and a sliding foot block (11) hinged to the scissor brace (31) on the rear side.

4. The transfer trolley for indoor scaffolding according to claim 3, characterized in that, The guide beam (4) and support beam (5) have slots (13) along their length on both sides of the groove; the bottom surface of the sliding foot block (11) has a groove (14) corresponding to the slot (13).

5. The transfer trolley for indoor scaffolding according to claim 1, characterized in that, The drive pedal (8) includes a drive link (81) connected to the movable end of the scissor brace assembly (3) and a foot pedal (82) connected to the drive link.

6. A method of using an indoor scaffolding transfer trolley as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Move the transfer trolley to the center below the scaffold (18), remove the upper scaffold board (9) from the scaffold (18), flip the scaffold board (9) over and fix it to the supporting angle steel (16) through T-shaped pins (17), and fasten the buckles (19) at the four corners of the two ends of the scaffold board (9) to the horizontal bars (20) at both ends of the lower layer of the scaffold (18); Step 2: Step on the foot pedal (82) to drive the movable end of the scissor brace assembly (3) forward, which will lift the support beam (5) and the scaffold boards (9) on it, thereby pushing the scaffold (18) to a suitable position; the position of the movable end of the scissor brace assembly (3) is restricted by the anti-reverse component (15); Step 3: Move the transfer trolley to move the scaffolding (18) to the designated area; Step 4: Pull out the limiting pin on the rear side of the movable end of the guide beam (4) or move the anti-reverse assembly (15) backward to release the limiting on the movable end of the scissor brace assembly (3). The scissor brace assembly and its upper scaffold (18) descend under the action of gravity, and the scaffold descends to the designated area. Step 5: Pull out the T-pins, lift the scaffold board (9) from the supporting angle steel and flip it to fasten it onto the upper horizontal bar (20) of the scaffold (18), and push the transfer trolley to move it out from the underside of the scaffold.

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