Building curtain wall corner trimming device and trimming method

Abstract

The application relates to the field of building construction and discloses a building curtain wall corner trimming device and a trimming method, wherein the trimming device is installed on a first curtain wall at a wall corner and is used for polishing a corner protruding from a lower end of a second curtain wall which is perpendicular to the first curtain wall, and the trimming device comprises a positioning assembly, a fixing frame and a polishing device; the positioning assembly comprises a base plate and a plurality of suction cups arranged on the base plate and adsorbed on the surface of the first curtain wall; the first end of the fixing frame is horizontally connected with the positioning assembly, and the second end is hooked on the surface of the second curtain wall; the polishing device is vertically and slidably arranged on the base plate, and a blade in the polishing device is close to the surface of the first curtain wall at the wall corner, so as to polish the corner on the lower end of the second curtain wall and protruding from the surface of the first curtain wall; the operation is convenient and fast, the positioning is accurate, and the device does not need to be fixed by punching or external supports.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology and discloses a device and method for trimming the corners of building curtain walls. Background Technology

[0002] In recent years, more and more residential buildings have adopted dry-hanging curtain wall structure design. Compared with tiling or painting, it has the advantages of quick assembly and convenient maintenance. In particular, most of the exterior walls of self-built houses or low-rise commercial housing use imitation marble ceramic tiles as curtain wall panels.

[0003] During the dry-hanging process of curtain wall panels, due to positioning errors in the positioning holes or fixing plates between the hangers and the curtain wall panels, the curtain wall sometimes tilts slightly on the outer side of the wall, creating a certain angular deviation from the vertical line. This is especially noticeable at exterior wall corners, causing the lower corners of the curtain wall to bulge outwards. Alternatively, for some square doorpost structures with a slightly sloping and thickened lower side, when dry-hanging curtain wall panels on the sloping surface, the end faces of adjacent curtain wall panels are perpendicular / tangent. If the curtain wall panels tilt, [further issues may arise]. This causes the lower corners of the curtain wall to tilt outwards and protrude. To address the tilting issue of the curtain wall panels at the masonry corners, when it is difficult to adjust and correct using corner brackets, an angle grinder is usually used to grind the corners to make them flat before filling and repairing them with sealant. However, since the protrusion of the corners is usually low, it is difficult to control the angle when grinding directly with a hand-held angle grinder. This results in some areas of the grinding surface not being finished while others are being ground, leading to unevenness and easily scratching the surface of the curtain wall panels on adjacent sides. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for trimming the corners of building curtain walls.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] On one hand, the present invention provides a building curtain wall corner trimming device, installed on a first curtain wall at a masonry corner, for grinding the protruding corner of a second curtain wall perpendicular to the first curtain wall, comprising:

[0007] A positioning component includes a substrate and a plurality of suction cups disposed on the substrate, wherein the suction cups are used to adhere to the surface of a first curtain wall to fix the substrate.

[0008] A fixing frame, comprising a first end and a second end opposite to each other, wherein the first end of the fixing frame is horizontally connected to the positioning assembly, and the second end is hooked onto the surface of the second curtain wall; and

[0009] A grinding device is vertically slidably mounted on the substrate. The blade inside the grinding device is close to the surface of the first curtain wall at the corner of the wall, and is used to grind the corner located at the lower end of the second curtain wall and protruding from the surface of the first curtain wall.

[0010] Furthermore, the fixing frame is provided with a horizontally extending rack surface, and a gear that meshes with the rack surface is rotatably provided in the base plate, so that the first end of the fixing frame is horizontally movable and connected in the base plate.

[0011] The suction cup includes a housing attached to the surface of the first curtain wall and a pull core that can be moved up and down inside the housing. The lower end of the pull core forms a negative pressure cavity enclosed by the housing between itself and the first curtain wall. The pull core is threadedly connected to the housing. A set of connecting pins is slidably disposed inside the shaft of the gear, and the lower end of the connecting pins is connected to the pull core. The suction cup is configured to be pulled out from the substrate by the fixing frame and drive the pull core to move upward, so that the suction cup is adsorbed onto the first curtain wall.

[0012] Furthermore, the substrate is arranged vertically, and the substrate is adsorbed onto the first curtain wall by two sets of suction cups, and the core of each set of suction cups is connected to a set of fixing frames by a set of connecting pins and gears.

[0013] Furthermore, a set of springs is provided inside the shaft of the gear, and the lower end of the springs is connected to the connecting pin to drive the connecting pin to be inserted into the core puller.

[0014] Furthermore, the fixing frame includes a crossbar and a hook. The first end of the crossbar is provided with the rack surface and the second end is provided with a set of rotating bushings. The hook is rotatably connected to the rotating bushings so that the hook can rotate around the rotating bushings.

[0015] The hook has a first end located on the first side of the rotating shaft sleeve and a second end located on the second side of the rotating shaft sleeve. The second end of the hook is provided with a rubber pad that can be attached to the second curtain wall.

[0016] Furthermore, a set of horizontally sliding sliders are embedded in the second end of the crossbar, and the rotating shaft is sleeved on the sliders;

[0017] A set of threaded pins is connected inside the rotating shaft sleeve. One end of the threaded pin passes through the hook, and the other end is threadedly connected to the crossbeam.

[0018] Furthermore, the connecting pin is also provided with a conical portion, the axis of the conical portion is coaxial with the axis of the connecting pin, and the bottom surface of the conical portion faces the gear side;

[0019] The suction cup is also provided with a set of horizontally sliding push rods. One end of the push rod abuts against the side of the conical part, and the other end faces the hook. The second end of the hook is provided with a set of protrusions. When the push rod abuts against the protrusions, the other end of the push rod lifts the conical part so that the lower end of the connecting pin disengages from the core puller.

[0020] Furthermore, the suction cup has a set of guide cylinders on its outer shell, the push rod passes through the guide cylinders, and a spring is provided between the push rod and the guide cylinders to drive the end of the push rod to disengage from the conical part.

[0021] Furthermore, the fixing frame is provided with an elongated hole parallel to the length direction of the rack surface, and the base plate is provided with a limiting pin passing through the elongated hole to limit the sliding stroke of the fixing frame.

[0022] On the other hand, the present invention also provides a trimming method using the building curtain wall corner trimming device as described above, which includes the following steps:

[0023] S1: Clean the first curtain wall, align the positioning components with the first curtain wall and make the substrate vertical, pull the two sets of fixing brackets so that the two sets of suction cups are attached to the first curtain wall;

[0024] S2: Rotate the hook at the end of the fixing bracket so that the second end of the hook is attached to the second curtain wall;

[0025] S3. Move the grinding device down and grind the protruding corners at the bottom of the second curtain wall.

[0026] Compared to traditional construction methods that involve directly grinding edges and corners with a handheld grinder, this invention utilizes a positioning component. The grinding device is placed on the positioning component, which is then attached to the first curtain wall on one side via a suction cup. Furthermore, it is hooked and positioned to the surface of the second curtain wall on the other side via a fixing bracket. This design offers the following advantages:

[0027] 1. The positioning component is attached to the surface of the first curtain wall by suction cups, which is convenient and quick to operate and easy to move and adjust without the need for drilling or external brackets for fixing.

[0028] 2. The grinding device can be vertically slidably mounted on the positioning component, and its blade is configured to fit against the surface of the first curtain wall. During the up-and-down sliding grinding process, the blade will not damage the first curtain wall.

[0029] 3. By hooking the fixed frame onto the second curtain wall, the positioning component can be positioned between the corner of the wall and the wall, so that the blade in the grinding device is aligned with the corner of the wall, achieving precise positioning. Grinding can then be performed by directly operating the grinding device to move it. Attached Figure Description

[0030] Figure 1 This is a side view of the building curtain wall corner trimming device of the present invention in use.

[0031] Figure 2 This is a frontal view of the building curtain wall corner trimming device of the present invention in use.

[0032] Figure 3 This is a schematic diagram of the connection structure between the fixing frame and the positioning component in one embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram showing the connection relationship between the connecting pin and the push rod in another embodiment of the present invention;

[0034] Icons: 10-First curtain wall, 11-Second curtain wall, 2-Positioning component, 20-Base plate, 200-Handle, 201-Extension, 2010-Slide groove, 202-Limit pin, 21-Suction cup, 210-Housing shell, 2100-Internal threaded column, 211-Core puller, 212-Negative pressure chamber, 22-Gear, 23-Connecting pin, 230-Conical part, 24-Top rod, 240-Guide cylinder, 3-Grinding device, 30-Blade, 300-Connecting arm, 31-Grip, 4-Fixing bracket, 40-Horizontal frame, 400-Rack surface, 401-Elongated hole, 41-Hook, 410-Rubber pad, 411-Protrusion, 42-Slider, 420-Rotating sleeve, 421-Threaded pin. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Example 1:

[0037] Reference Figures 1 to 4 The present invention provides a corner trimming device for building curtain walls, including a positioning component 2, a grinding device 3 and a fixing frame 4.

[0038] Reference Figure 1 The positioning component 2 is installed on the first curtain wall 10 at the corner of the masonry. The grinding device 3 can be slidably installed on the positioning component 2. By moving the grinding device 3 downward, the blade 30 in the grinding device 3 can be driven to grind the corner located at the lower end of the second curtain wall 11 and protruding from the surface of the first curtain wall 10.

[0039] The positioning component 2 includes a base plate 20 and a plurality of suction cups 21 disposed on the base plate 20. The suction cups 21 can be adsorbed onto the smooth surface of the first curtain wall 10 to fix the entire positioning component 2 to the outer wall of the first curtain wall 10.

[0040] Reference Figure 2 The fixing frame 4 is defined to have a first end and a second end opposite to each other. The first end of the fixing frame 4 is horizontally connected to the base plate 20 in the positioning assembly 2. The fixing frame 4 is parallel to the surface of the first curtain wall 10, and the second end of the fixing frame 4 is hooked onto the surface of the second curtain wall 11.

[0041] To ensure secure installation of the trimming device, two or more suction cups 21 can be installed inside the positioning assembly 2, and two or more sets of fixing brackets 4 can also be installed; see reference Figure 1 and Figure 2 In this embodiment, the substrate 20 is vertically arranged and is attached to the first curtain wall 10 by two sets of suction cups 21. Each set of suction cups 21 is provided with a set of fixing brackets 4 on the side. In addition, the lower end of the substrate 20 is provided with an extension 201, and a vertical groove 2010 is provided on the extension 201. The polishing device 3 cooperates with the groove 2010. The polishing device 3 is suspended in the positioning component 2 by an elastic bracket. By pulling down the handle 31 on the polishing device 3, the polishing device 3 can slide up and down.

[0042] Reference Figure 1 The grinding device 3 can be a commercially available grinding machine, or as in this embodiment, the grinding device 3 includes a set of motors, a connecting arm 300 is provided on one side of the grinding device 3, and a blade 30 is rotatably mounted at the end of the connecting arm 300. The motor is driven by the blade 30 through a pulley mechanism built into the connecting arm 300.

[0043] When the positioning component 2 is installed on the first curtain wall 10, the blade 30 can be positioned at the corner to be polished through the extension of the connecting arm 300, and the blade 30 is close to the surface of the first curtain wall 10. By moving the polishing device 3 downward, the corner protruding from the surface of the first curtain wall 10 can be polished.

[0044] In actual use, the gap between the blade 30 and the surface of the first curtain wall 10 can be between 1mm and 2mm. After the grinding device 3 finishes grinding, it can be further trimmed with sandpaper.

[0045] Due to the guiding effect of the substrate 20 inside the positioning component 2, during the downward movement of the grinding device 3, the distance between the blade 30 and the surface of the first curtain wall 10 is constant, making it difficult to damage the surface of the first curtain wall 10, and the protruding corner grinding surface on the second curtain wall 11 is flat.

[0046] The blade 30 inside the grinding device 3 is close to the surface of the first curtain wall 10 at the corner of the wall, and is used to grind the corner located on the lower end of the second curtain wall 11 and protruding from the surface of the first curtain wall 10.

[0047] Reference Figure 2 In this view direction, during the downward grinding process of the blade 30 in the grinding device 3, the lower right side of the blade 30 mainly undertakes the cutting action on the corners. During the process, the corners will exert a force to the upper left on the blade 30 and the entire positioning assembly 2. Since the base plate 20 in the positioning assembly 2 is vertically arranged and has two sets of suction cups 21, the positioning assembly 2 can maintain greater stability in the vertical direction. In addition, since the two sets of fixing brackets 4 are connected to the positioning assembly 2 and the other end of the fixing brackets 4 is hooked on the second curtain wall 11, the entire positioning assembly 2 can also maintain stability in the horizontal direction. Therefore, during the grinding and finishing process, the vibration of the entire finishing device is minimal.

[0048] Reference Figure 3 The existing technology is as follows: The suction cup 21 includes a shell 210 attached to the surface of the first curtain wall 10. The lower end of the shell 210 is open and contacts the surface of the first curtain wall 10 through an elastic rubber gasket. The upper end of the shell 210 is connected to the substrate 20. A core puller 211 is provided inside the shell 210. The lower end of the core puller 211 is a rubber cup structure. The lower end of the cup is fixed to the inner wall of the lower end of the shell 210 by a metal ring. Initially, the cup is flush with the lower end of the shell 210. When the suction cup 21 is pressed onto the first curtain wall 10, the upward movement of the core puller 211 can form a negative pressure cavity 212 between the cup and the surface of the first curtain wall 10. Since the negative pressure cavity 212 is wrapped inside the shell 210 through the cup, the expansion of the negative pressure cavity 212 makes the entire suction cup 21 firmly adhered to the first curtain wall 10.

[0049] Example 2:

[0050] In this embodiment, an internally threaded post 2100 is installed on the upper inner sidewall of the outer shell 210, and the pull core 211 is threadedly connected to the internally threaded post 2100. The forward and reverse rotation of the pull core 211 can cause the suction cup 21 to be adsorbed or removed from the surface of the first curtain wall 10.

[0051] Therefore, refer to Figure 3Each set of fixing brackets 4 includes a horizontal crossbeam 40 and a hook 41 at the end of the crossbeam 40. The crossbeam 40 is provided with a rack surface 400 extending horizontally to the left and right. A set of gears 22 that mesh with the rack surface 400 are rotatably provided in the inner cavity of the substrate 20. The shaft of the gear 22 is a hollow structure, and a set of connecting pins 23 are provided inside which can slide up and down. The lower end of the connecting pins 23 is connected to the core puller 211. Therefore, when the fixing bracket 4 is pulled out from the substrate 20, it can drive the gear 22 to rotate. The rotation of the gear 22 can drive the core puller 211 to rotate, so that the core puller 211 moves upward, the negative pressure cavity 212 expands, and the suction cup 21 is adsorbed onto the first curtain wall 10.

[0052] As is easily understood, the connecting pin 23 is a pin that bears the force / torque transmission. Therefore, both ends of the connecting pin 23 are triangular, quadrilateral or pentagonal structures, etc. In addition, a set of springs (not shown) is provided inside the rotating shaft of the gear 22. The lower end of the spring is connected to the connecting pin 23 to drive the connecting pin 23 to move down and be inserted into the core puller 211.

[0053] In addition, the fixing frame 4 includes a crossbar 40 and a hook 41, which is rotatably connected to the end of the crossbar 40.

[0054] Reference Figure 3 When in use, first place the base 20 vertically and press the suction cup 21 against the surface of the first curtain wall 10. Pull the fixing frame 4 outward to the right so that, in the top view, the gear 22 drives the core puller 211 to rotate clockwise, causing the core puller 211 to move upward, so that a negative pressure cavity 212 is formed inside the suction cup 21 and it is adsorbed onto the first curtain wall 10. At this time, the hook 41 at the other end of the fixing frame 4 is hooked onto the second curtain wall 11, thus forming a stable structure.

[0055] Specifically, refer to Figure 3 The first end of the crossbeam 40 is provided with a rack surface 400 and the second end is provided with a set of rotating bushings 420. The hook 41 is rotatably connected to the rotating bushings 420 so that the hook 41 can rotate around the rotating bushings 420. The hook 41 has a first end located on the first side (upper side) of the rotating bushings 420 and a second end located on the second side (lower side) of the rotating bushings 420. The second end of the hook 41 is provided with a rubber pad 410 that can fit against the second curtain wall 11. When in use, after holding the hook 41 and pulling the fixing bracket 4 out from the substrate 20, the hook 41 is rotated 180° so that the hook 41 can be hooked on the second curtain wall 11.

[0056] Reference Figure 3In some embodiments, a set of sliders 42 that can slide horizontally left and right are embedded in the second end of the cross frame 40. A rotating sleeve 420 is disposed on the sliders 42, and the hook 41 is rotatably connected to the rotating sleeve 420, so that the length of the fixed frame 4 is adjustable. In addition, a set of threaded pins 421 are connected inside the rotating sleeve 420. One end of the threaded pin 421 passes through the hook 41, and the other end is threadedly connected to the cross frame 40, so that the length of the fixed frame 4 can be locked by the threaded pin 421.

[0057] Reference Figure 3 and Figure 4 In some embodiments, the connecting pin 23 is further provided with a conical portion 230, wherein the axis of the conical portion 230 is coaxial with the axis of the connecting pin 23, and the bottom surface of the conical portion 230 faces the gear 22; a set of horizontally sliding push rods 24 are also provided on the outer shell 210 of the suction cup 21, one end of the push rod 24 abuts against the side of the conical portion 230, and the other end faces the hook 41; a set of protrusions 411 are provided on the second end side wall of the hook 41, and when the push rod 24 abuts against the protrusions 411, the other end of the push rod 24 pushes up the conical portion 230, so that the lower end of the connecting pin 23 disengages from the core puller 211.

[0058] In addition, refer to Figure 2 The suction cup 21 has a set of guide cylinders 240 on its outer shell 210 that extend in the same direction as the fixing frame 4. The push rod 24 passes through the guide cylinder 240. A spring is provided between the push rod 24 and the right end of the guide cylinder 240 to drive the push rod 24 to slide to the right so that the left end of the push rod 24 disengages from the conical part 230.

[0059] In addition, to limit the sliding stroke of the fixing frame 4, refer to Figure 3 The mounting bracket 4 is provided with an elongated hole 401 parallel to the length direction of the rack surface 400, and the base plate 20 is provided with a limiting pin 202 passing through the elongated hole 401.

[0060] Example 3:

[0061] This embodiment also provides a trimming method using the building curtain wall corner trimming device as described in Embodiment 2 above, which includes the following steps:

[0062] S1. First, clean the first curtain wall 10, so that the two sets of suction cups 21 on the positioning component 2 adhere to the surface of the first curtain wall 10, and keep the substrate 20 vertical; then, pull the two sets of fixing brackets 4 to expand the negative pressure chamber 212, so that the two sets of suction cups 21 are adsorbed on the first curtain wall 10.

[0063] S2: Reference Figure 3When the left end of the elongated hole 401 on the crossbeam 40 abuts against the limit pin 202, the crossbeam 40 slides to its maximum travel, the hook 41 moves to the outside right side of the first curtain wall 10, rotates the hook 41 180° and presses it onto the second curtain wall 11, so that the rubber pad 410 at its second end adheres to the surface of the second curtain wall 11.

[0064] During the process, since the pivot sleeve 420 is slidably set at the second end of the cross frame 40, the length of the fixing frame 4 still has a certain margin, and the rubber pad 410 cannot be locked and attached to the surface of the second curtain wall 11. At this time, it is only necessary to screw the threaded pin 421 so that its left side extends out from the pivot sleeve 420 and is threadedly connected to the end of the cross frame 40, which can reduce the overall length of the fixing frame 4 and make the rubber pad 410 at the right end of the fixing frame 4 just press against the second curtain wall 11. At this time, the length of the fixing frame 4 is fixed.

[0065] At the same time, when the hook 41 rotates 180° to make the rubber pad 410 adhere to the surface of the second curtain wall 11, the protrusion 411 at the second end of the hook 41 pushes the top rod 24 to the left, causing the connecting pin 23 to move upward and disengage from the core pull 211; therefore, during the process of screwing the threaded pin 421 to insert its end and connect it to the cross frame 40, even if the cross frame 40 moves to the left, it will not be transmitted to the core pull 211 through the connecting pin 23, and will not affect the adsorption effect of the suction cup 21;

[0066] S3. After the finishing device is installed, simply operate the grinding device 3 to move down and grind the protruding corners at the bottom of the second curtain wall 11.

[0067] S4. After grinding, loosen the threaded pin 421 so that its end is disengaged from the crossbeam 40. Rotate the hook 41 180° so that the second end of the hook 41 is disengaged from the surface of the second curtain wall 11. The top rod 24 automatically slides to the right to reset, so that the lower end of the connecting pin 23 is reconnected to the core puller 211. Then slide the retractable fixing frame 4 to the left, which will drive the core puller 211 to rotate in the opposite direction, so that the negative pressure chamber 212 shrinks until it disappears, and the entire finishing device can be removed.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A corner trimming device for building curtain walls, installed on a first curtain wall (10) at a masonry corner, used for grinding the protruding corner of a second curtain wall (11) perpendicular to the first curtain wall (10), characterized in that, include: The positioning component (2) includes a substrate (20) and a plurality of suction cups (21) disposed on the substrate (20), wherein the suction cups (21) are used to adhere to the surface of the first curtain wall (10) to fix the substrate (20). A fixing frame (4) comprising a first end and a second end opposite to each other, wherein the first end of the fixing frame (4) is horizontally connected to the positioning assembly (2), and the second end is hooked onto the surface of the second curtain wall (11); and A grinding device (3) is vertically slidably mounted on the substrate (20). The blade (30) inside the grinding device (3) is close to the surface of the first curtain wall (10) at the corner of the wall, and is used to grind the corner located on the lower end of the second curtain wall (11) and protruding from the surface of the first curtain wall (10). The fixing frame (4) is provided with a horizontally extending rack surface (400), and the base plate (20) is rotatably provided with a gear (22) that meshes with the rack surface (400), so that the first end of the fixing frame (4) is horizontally movable and connected to the base plate (20). The suction cup (21) includes a housing (210) attached to the surface of the first curtain wall (10) and a pull core (211) movable up and down inside the housing (210). The lower end of the pull core (211) forms a negative pressure cavity (212) enclosed by the housing (210) between it and the first curtain wall (10). The pull core (211) is threadedly connected to the housing (210). A set of connecting pins (23) is slidably provided in the shaft of the gear (22), and the lower end of the connecting pins (23) is connected to the pull core (211). The suction cup (21) is configured to be pulled out from the substrate (20) by the fixing frame (4) and drive the pull core (211) to move upward, so that the suction cup (21) is adsorbed onto the first curtain wall (10).

2. The building curtain wall corner trimming device according to claim 1, characterized in that... The substrate (20) is arranged vertically, and the substrate (20) is attached to the first curtain wall (10) by two sets of suction cups (21). The core pull (211) of each set of suction cups (21) is connected to a set of fixing frames (4) through a set of connecting pins (23) and gears (22).

3. The building curtain wall corner trimming device according to claim 2, characterized in that... The gear (22) is also provided with a set of springs inside its shaft. The lower end of the springs is connected to the connecting pin (23) to drive the connecting pin (23) to be inserted into the core puller (211).

4. The building curtain wall corner trimming device according to claim 2 or 3, characterized in that... The fixing frame (4) includes a cross frame (40) and a hook (41). The first end of the cross frame (40) is provided with the rack surface (400) and the second end is provided with a set of rotating bushings (420). The hook (41) is rotatably connected to the rotating bushings (420) so that the hook (41) can rotate around the rotating bushings (420). The hook (41) has a first end located on the first side of the rotating sleeve (420) and a second end located on the second side of the rotating sleeve (420). The second end of the hook (41) is provided with a rubber pad (410) that can be attached to the second curtain wall (11).

5. The building curtain wall corner trimming device according to claim 4, characterized in that... The second end of the crossbar (40) is fitted with a set of horizontally sliding sliders (42), and the rotating bushing (420) is disposed on the sliders (42); A set of threaded pins (421) are connected inside the rotating bushing (420). One end of the threaded pin (421) passes through the hook (41), and the other end is threadedly connected to the crossbar (40).

6. The building curtain wall corner trimming device according to claim 4, characterized in that... The connecting pin (23) is also provided with a conical part (230), the axis of the conical part (230) is coaxial with the axis of the connecting pin (23), and the bottom surface of the conical part (230) faces the gear (22). A set of horizontally sliding push rods (24) are also provided on the outer shell (210) of the suction cup (21). One end of the push rod (24) abuts against the side of the conical part (230), and the other end faces the hook (41). A set of protrusions (411) are provided on the second end side wall of the hook (41). When the push rod (24) abuts against the protrusions (411), the other end of the push rod (24) pushes up the conical part (230) so that the lower end of the connecting pin (23) disengages from the core puller (211).

7. The building curtain wall corner trimming device according to claim 6, characterized in that... The suction cup (21) has a set of guide cylinders (240) on its outer shell (210). The push rod (24) passes through the guide cylinder (240). A spring is provided between the push rod (24) and the guide cylinder (240) to drive the end of the push rod (24) to disengage from the conical part (230).

8. The building curtain wall corner trimming device according to claim 7, characterized in that... The fixing frame (4) is provided with an elongated hole (401) parallel to the length direction of the rack surface (400), and the base plate (20) is provided with a limiting pin (202) passing through the elongated hole (401) to limit the sliding stroke of the fixing frame (4).

9. A method for trimming the corner of a building curtain wall using the trimming device according to any one of claims 6 to 8, characterized in that, Includes the following steps: S1: Clean the first curtain wall (10), align the positioning component (2) with the first curtain wall (10) and make the substrate (20) vertical, pull the two sets of fixing brackets (4) so ​​that the two sets of suction cups (21) are attached to the first curtain wall (10); S2: Rotate the hook (41) at the end of the fixed bracket (4) so ​​that the second end of the hook (41) is attached to the second curtain wall (11); S3. Operate the grinding device (3) to move down and grind the protruding corners at the lower end of the second curtain wall (11).

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