A secondary vibrating and leveling device for assembled building exterior wall panels

Abstract

The present invention provides a secondary vibration and leveling device for prefabricated building exterior wall panels, which relates to the technical field of building exterior wall panels. The secondary vibration and leveling device based on prefabricated building exterior wall panels includes two second bases, the tops of the second bases are fixedly connected to electric slide rails, the middle outer walls of the electric slide rails are slidably connected to first sleeves, the interiors of the fixed columns close to the sides are provided with first grooves, the rear sides of the second bases are fixedly connected to the first bases, the bottoms of the side panels close to the sides are fixedly connected to box frames, the interiors of the side panels are rotatably connected to first screws, the front sides of the second screw sleeves are fixedly connected to third support plates, and the front middle parts of the fixed columns are fixedly connected to fixed plates. By leveling the prefabricated building exterior wall panels and covering them with a film after leveling, the quality and use efficiency of the prefabricated building exterior wall panels can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of building exterior wall panels, in particular to a secondary vibrating and leveling device for assembled building exterior wall panels. Background Art

[0002] Prefabricated building exterior wall panels refer to buildings assembled on site using prefabricated structures. Buildings are built by assembling and matching prefabricated components that have been made in advance on site. The construction method is a bit like stacking building blocks. It integrates modern assembly technology, refreshes the traditional construction method, and becomes a new direction for the future development of the construction industry. The advantages of this type of building are fast construction speed, convenience and speed, shortened construction period, reduced material waste to a certain extent, and environmental protection.

[0003] In the modern society with the rapid development of the construction industry, prefabricated building exterior wall panels based on walls are gradually emerging. The prefabricated building exterior wall panels can be made into the shape of a wall before installation, which improves the installation speed of the building wall. However, there is a certain room for development in the existing prefabricated building exterior wall panels, which are vibrated and leveled after pouring concrete into the mold. After the leveling device leveled the prefabricated building exterior wall panels, there is often residual concrete attached to the surface, which in turn affects the next leveling, thereby greatly reducing the leveling effect of the prefabricated building exterior wall panels. In addition, the top surface of the prefabricated building exterior wall panels after leveling needs to be covered with a film, and the current film covering process often requires manual paving, which is time-consuming and labor-intensive. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a secondary vibrating and leveling device for prefabricated building exterior wall panels, which solves the problems of vibrating and leveling the prefabricated building exterior wall panels and residual concrete on the scraping plate.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a secondary vibration and scraping device for prefabricated building exterior wall panels, comprising two second bases, the top ends of the second bases are fixedly connected to electric slide rails, the middle outer walls of the electric slide rails are slidably connected to first sleeves, the top ends of the first sleeves are fixedly connected to fixed columns, the insides of the fixed columns are close to a first groove, the rear sides of the second bases are fixedly connected to the first base, both sides of the top end of the first base are fixedly connected to side panels, the bottoms of the side panels close to a side are fixedly connected to a box frame, the insides of the side panels are rotatably connected to first screws, the outer walls of the first screws are threadedly connected to a second screw sleeve, the front side of the second screw sleeve is fixedly connected to a third support plate, the middle front sides of the fixed columns are fixedly connected to the fixed plates, and the sides of the fixed plates close to a side are fixedly connected to the second support plates.

[0006] Preferably, a second screw is provided at both upper and lower ends of the first groove on one side, and both ends of the outer wall of the second screw are rotatably connected to the inside of the fixed column, the top of the fixed column on one side is fixedly connected to the first servo motor, the bottom driving end of the first servo motor is fixedly connected to the top of the second screw, the outer wall of the second screw is threadedly connected to the first sleeve, and the outer wall of the first sleeve is slidably connected to the inside of the first groove, and the upper and lower ends of the first groove on the other side are fixedly connected to the fixing rod, the outer wall of the fixed rod is slidably connected to the second sleeve, and the outer wall of the second sleeve is slidably connected to the inside of the first groove, and the second sleeve and the first sleeve are fixedly connected to the first support plate on the side close to each other, and the bottom end of the first support plate is fixedly connected to the scraping plate, and the scraping plate is located above the main body of the exterior wall panel of the prefabricated building.

[0007] Preferably, a second servo motor is fixedly connected to one side of the side plate, and a first screw is fixedly connected to a driving end of the second servo motor close to the side plate.

[0008] Preferably, the bottom end of the box frame is fixedly connected to the top of the first base, and a plurality of collection boxes are slidably connected to the inner wall of the box frame. Second grooves are provided inside both sides of the collection boxes, and the inner walls of the second grooves are slidably connected to sliders, and the sliders are fixedly connected to the middle of the inner wall of the box frame on the side away from the collection box.

[0009] Preferably, the second base is provided with a prefabricated building exterior wall panel body on one side thereof, and the rear side of the prefabricated building exterior wall panel body is provided on the front side of the first base.

[0010] Preferably, the front side of the third support plate is fixedly connected to the second electric telescopic rod, the front end of the second electric telescopic rod is fixedly connected to the connecting plate, the middle part of the front side of the connecting plate is fixedly connected to the scraper, both sides of the front side of the connecting plate are fixedly connected to the collecting racks, the collecting racks are fixedly connected to both sides of the scraper on the side close to each other, and a bottom plate is provided inside the bottom end of the collecting rack, a small stepper motor is fixedly connected to the bottom of one side of the collecting rack, and a driving end of the small stepper motor close to the collecting rack is fixedly connected to a rotating shaft, the outer wall of the rotating shaft is fixedly connected to the front side of the bottom plate, and both ends of the outer wall of the rotating shaft are rotatably connected to the bottom of the collection rack on the side away from each other, and the bottom plate is located above the box frame.

[0011] Preferably, the side plates close to each other and located below the first screw are fixedly connected to a limiting plate, and the bottom end of the second screw sleeve is slidably connected to the top surface of the limiting plate.

[0012] Preferably, the middle part of the bottom end of the second support plate is fixedly connected to the first electric telescopic rod, the bottom end of the first electric telescopic rod is fixedly connected to a fixed block, the fixed block is fixedly connected to a spring support body on one side, and a roller is provided on the outer wall of the spring support body on one end, and a film roll is connected around the outer wall of the roller, and the film roll is located above the main body of the prefabricated building exterior wall panel.

[0013] Working principle: After the concrete is poured inside the main body of the prefabricated building exterior wall panel, the electric slide rails at the top of the second base on both sides are combined with the first sliding sleeve to enable the fixed column to move back and forth. Since the first servo motor at the top of the fixed column on one side drives the second screw in the first groove to run, the second screw drives the first screw sleeve of the outer wall to move up and down, and the first screw sleeve is inside the first groove, so that the first screw sleeve will not rotate due to the operation of the second screw when it runs. The first groove inside the fixed column on the other side is combined with the fixed rod and the second sliding sleeve. The first screw sleeve and the second sliding sleeve are fixed to the first support plate on the side close to the first support plate, and the bottom end of the first support plate is combined with the scraper plate. In this way, the scraper plate can perform a secondary scraping process on the prefabricated building exterior wall panel through the combination of the second base and the first sliding sleeve, the first servo motor and the second screw. After scraping, there will be concrete residue at the bottom of the scraper plate. The scraper plate is operated by the first servo motor to a height that can touch the scraper. At this time, the first screw on the inner side panel of the top of the first base starts to run, and the first screw is combined with the second servo motor, the second screw sleeve and the third support plate to drive the scraper The plate moves left and right, and the scraper and the third support plate are connected by a second electric telescopic rod and a connecting plate, which can extend the scraper to the bottom of the scraper plate so that it can process the concrete residue at the bottom of the scraper plate. The scraped concrete residue falls into the collection rack through the action of the scraper. After scraping, the collection rack moves to the top of the collection box inside the box frame through the second electric telescopic rod. The bottom plate at the bottom of the collection rack is rotated to open the opening through the combination of a small stepping motor and a rotating shaft, and then the concrete residue falls into the collection box. At the same time, the first electric telescopic rod at the bottom end of the second support plate on the side close to the fixed plate drives the film roll to move downward, and then the surface of the prefabricated building exterior wall panel is covered by the operation of the electric slide rail to achieve the maintenance effect. When the film roll needs to be replaced after use, the roller inside the film roll can be removed by combining with the spring support body inside the fixed block, thereby achieving the effect of easy replacement. After a certain amount of concrete residue is filled in the collection box, the collection box can be taken out by combining the second groove and the slider, thereby achieving the effect of facilitating the disposal of concrete residue.

[0014] The present invention provides a secondary vibrating and leveling device for assembled building exterior wall panels. It has the following beneficial effects:

[0015] The present invention can drive the scraping plate to move forward and backward to scrape the main body of the prefabricated building exterior wall panel by arranging an electric slide rail, a first sliding sleeve, and a fixed column at the top of the second base. The scraping plate is combined with the first support plate, the first screw sleeve, the second screw rod, the first servo motor, the second sliding sleeve, and the fixed rod to move downward, and then scrape it tightly against the top surface of the main body of the prefabricated building exterior wall panel. After scraping, there will be concrete residue at the bottom of the scraping plate. At this time, the concrete remaining at the bottom of the scraping plate is scraped down by the first screw rod and the second screw sleeve, the third support plate, the second electric telescopic rod, the connecting plate, and the scraper combination device on the inner side of the top end of the first base, so that it will not affect the next scraping of the scraping plate, thereby achieving the effect of not reducing the scraping efficiency of the subsequent prefabricated building exterior wall panels.

[0016] The present invention supports the first electric telescopic rod by arranging a fixed plate and a second support plate in the middle of the front side of the fixed column. The first electric telescopic rod drives the fixed block and the spring support body to move downward, and then drives the film structure combined with the roller and the film roll to move downward to the surface of the main body of the prefabricated building exterior wall panel, and then performs paving and maintenance, which saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a front perspective view of the scraping and film paving structure of the present invention;

[0019] Figure 3 This is a front perspective view of the scraper structure of the present invention;

[0020] Figure 4 This is a front cross-sectional view of the scraping structure of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 This is the front view of the scraping and film paving structure of the present invention

[0023] Figure 7 for Figure 6 Enlarged view of point B in the middle

[0024] Figure 8 Rear view of the scraper structure of the present invention

[0025] Figure 9 for Figure 8 Enlarged view of point C in the middle

[0026] Figure 10 for Figure 8 Enlarged view of point D in the middle

[0027] Figure 11 It is a partial rear cross-sectional view of the scraper structure of the present invention.

[0028] Among them, 1. side panel; 2. first screw; 3. fixing column; 4. first screw sleeve; 5. first groove; 6. second screw; 7. first servo motor; 8. first support plate; 9. scraper plate; 10. film roll; 11. collection rack; 12. bottom plate; 13. collection box; 14. first electric telescopic rod; 15. roller; 16. spring support body; 17. first base; 18. first slide; 19. fixing plate; 20. second support plate; 21. second base; 22. electric slide; 23. fixing block; 24. box frame; 25. rotating shaft; 26. small stepping motor; 27. second screw sleeve; 28. third support plate; 29. second electric telescopic rod; 30. connecting plate; 31. scraper; 32. fixing rod; 33. second slide; 34. second servo motor; 35. second groove; 36. slider; 37. limit plate; 38. main body of prefabricated building exterior wall panel. Implementation Method

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0030] like Figure 1-11As shown, the embodiment of the present invention provides a secondary vibrating and leveling device for the exterior wall panels of assembled buildings, including two second bases 21, the tops of the second bases 21 are fixedly connected to electric slide rails 22, the outer walls of the middle parts of the electric slide rails 22 are slidably connected to first sleeves 18, the tops of the first sleeves 18 are fixedly connected to fixed columns 3, the insides of the fixed columns 3 are close to a first groove 5, the rear sides of the second bases 21 are fixedly connected to the first base 17, the top sides of the first base 17 are fixedly connected to side panels 1, the bottoms of the side panels 1 are fixedly connected to a box frame 24, the insides of the side panels 1 are rotatably connected to the first screws 2, the outer walls of the first screws 2 are threadedly connected to the second screw sleeves 27, the front sides of the second screw sleeves 27 are fixedly connected to the third support plate 28, the fixed columns 3 are fixedly connected to the first support plates 3, and the fixed columns 3 are fixedly connected to the first support plates 3. A fixed plate 19 is fixedly connected to the middle part of the front side, and a second support plate 20 is fixedly connected to the side close to the fixed plate 19. The electric slide rail 22 above the second base 21 can drive the first slide sleeve 18 to move forward and backward, and then drive the fixed column 3 at the top to move, so that it can drive the scraper plate 9 to move forward and backward to scrape the surface of the prefabricated building exterior wall panel main body 38, and the front side of the fixed column 3 is combined with the film structure through the second support plate 20 to fix the position, thereby achieving the effect of paving by running forward and backward. The side plate 1 at the top of the first base 17 on the rear side of the second base 21 is combined with the first screw 2 and the second screw sleeve 27 to move the third support plate 28 left and right, thereby achieving the effect of all-round concrete scraping on the bottom end of the scraper plate 9.

[0031] The first groove 5 on one side is provided with a second screw 6 at both ends, and both ends of the outer wall of the second screw 6 are rotatably connected to the inside of the fixed column 3. The top of the fixed column 3 on one side is fixedly connected to the first servo motor 7, and the bottom driving end of the first servo motor 7 is fixedly connected to the top of the second screw 6. The outer wall of the second screw 6 is threadedly connected to the first screw sleeve 4, and the outer wall of the first screw sleeve 4 is slidably connected to the inside of the first groove 5. The upper and lower ends of the first groove 5 on the other side are fixedly connected to the fixed rod 32, and the outer wall of the fixed rod 32 is slidably connected to the second sliding sleeve 33. The outer wall of the second sliding sleeve 33 is slidably connected to the inside of the first groove 5. The second sliding sleeve 33 and the first screw sleeve 4 are fixedly connected to the first support plate 8 on the side close to each other. The first support plate 8 The bottom end is fixedly connected to a scraping plate 9, and the scraping plate 9 is located above the main body 38 of the prefabricated building exterior wall panel. The second screw 6 drives the first screw sleeve 4 of the outer wall to move up and down, and the first screw sleeve 4 is inside the first groove 5, so that the first screw sleeve 4 will not rotate due to the operation of the second screw 6 when it is running. The first groove 5 inside the fixed column 3 on the other side is combined with the fixed rod 32 and the second sliding sleeve 33. The first screw sleeve 4 and the second sliding sleeve 33 are fixed to the first support plate 8 on one side, and the bottom end of the first support plate 8 is combined with the scraping plate 9, so that the scraping plate 9 can perform a secondary scraping process on the prefabricated building exterior wall panel through the combination of the second base 21, the first servo motor 7 and the second screw 6.

[0032] A second servo motor 34 is fixedly connected to one side of the side panel 1, and a first screw 2 is fixedly connected to the driving end of the second servo motor 34 close to the side panel 1. The first screw 2 is driven to rotate by the second servo motor 34, and the first screw 2 is combined with the side panel 1, thereby achieving the effect of stable operation of the first screw 2.

[0033] The bottom end of the box frame 24 is fixedly connected to the top of the first base 17, and a plurality of collection boxes 13 are slidably connected to the inner wall of the box frame 24. Second grooves 35 are provided inside both sides of the collection box 13, and sliders 36 are slidably connected to the inner walls of the second grooves 35. The sliders 36 are fixedly connected to the middle of the inner wall of the box frame 24 away from the collection box 13. After a certain amount of concrete residue is loaded inside the collection box 13 inside the box frame 24, the collection box 13 can be taken out by combining the second grooves 35 and the sliders 36, thereby achieving the effect of facilitating the disposal of concrete residue.

[0034] The second base 21 is close to a side where a prefabricated building exterior wall panel body 38 is provided. The rear side of the prefabricated building exterior wall panel body 38 is provided on the front side of the first base 17. The prefabricated building exterior wall panel body 38 is placed in a suitable position, so that the prefabricated building exterior wall panel body 38 can be vibrated and leveled for the second time through the entire device and then paved and maintained with a film after leveling.

[0035] The front side of the third support plate 28 is fixedly connected to the second electric telescopic rod 29, the front end of the second electric telescopic rod 29 is fixedly connected to the connecting plate 30, the middle of the front side of the connecting plate 30 is fixedly connected to the scraper 31, and both sides of the front side of the connecting plate 30 are fixedly connected to the collecting frame 11, and the collecting frame 11 is fixedly connected to both sides of the scraper 31 on one side. A bottom plate 12 is provided inside the bottom end of the collecting frame 11, and a small stepping motor 26 is fixedly connected to the bottom of one side of the collecting frame 11. The driving end of the small stepping motor 26 is fixedly connected to the rotating shaft 25 on the side close to the collecting frame 11. The outer wall of the rotating shaft 25 is fixedly connected to the front side of the bottom plate 12, and the two ends of the outer wall of the rotating shaft 25 are rotatably connected to the bottom inside the side away from the collecting frame 11. The bottom plate 12 is located above the box frame 24. After scraping, there will be concrete residue at the bottom of the scraping plate 9, and the scraping plate 9 is operated to When the height of the scraper 31 can be touched, the first screw 2 on the inner side plate 1 of the top end of the first base 17 starts to run. The first screw 2 is combined with the second servo motor 34, the second screw sleeve 27, and the third support plate 28 to drive the scraper 31 to move left and right, and the scraper 31 and the third support plate 28 are connected by the second electric telescopic rod 29 and the connecting plate 30, and the scraper 31 can be extended to the bottom of the scraper plate 9, so that it can process the concrete residue at the bottom of the scraper plate 9. The scraped concrete residue falls into the collection rack 11 through the action of the scraper 31. After scraping, the collection rack 11 runs to the top of the collection box 13 inside the box frame 24 through the second electric telescopic rod 29, and the bottom plate 12 at the bottom of the collection rack 11 is rotated to open the opening through the combination of the small stepping motor 26 and the rotating shaft 25, and then the concrete residue falls into the collection box 13.

[0036] The side plate 1 close to the side below the first screw rod 2 is fixedly connected to the limiting plate 37, and the bottom end of the second screw sleeve 27 is slidably connected to the top surface of the limiting plate 37. By setting the limiting plate 37, the direction of the second screw sleeve 27 can be fixed so that the second screw sleeve 27 will not rotate due to the operation of the first screw rod 2, thereby achieving the effect of stable left and right movement of the second screw sleeve 27.

[0037] The middle part of the bottom end of the second support plate 20 is fixedly connected to the first electric telescopic rod 14, and the bottom end of the first electric telescopic rod 14 is fixedly connected to the fixed block 23. The side close to the fixed block 23 is fixedly connected to the spring support body 16, and the outer wall of the spring support body 16 is provided with a roller 15. The outer wall of the roller 15 is surrounded by a film roll 10, and the film roll 10 is located above the main body 38 of the prefabricated building exterior wall panel. The first electric telescopic rod 14 at the bottom end of the second support plate 20 drives the film roll 10 to move downward, and then the surface of the prefabricated building exterior wall panel main body 38 is covered by the operation of the electric slide rail 22 to achieve a maintenance effect. When the film roll 10 is used up and needs to be replaced, the roller 15 inside the film roll 10 can be removed by combining with the spring support body 16 inside the fixed block 23, thereby achieving the effect of easy replacement.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A secondary vibrating and leveling device for assembled building exterior wall panels, comprising two second bases (21), characterized in that: The top of the second base (21) is fixedly connected to an electric slide rail (22), the middle outer wall of the electric slide rail (22) is slidably connected to a first slide sleeve (18), the top of the first slide sleeve (18) is fixedly connected to a fixed column (3), the inside of the fixed column (3) is provided with a first groove (5), the rear side of the second base (21) is fixedly connected to the first base (17), both sides of the top of the first base (17) are fixedly connected to side plates (1), the bottom of the side of the side close to the side is fixedly connected to a box frame (24), the inside of the side plate (1) is rotatably connected to a first screw rod (2), the outer wall of the first screw rod (2) is threadedly connected to a second screw sleeve (27), the front side of the second screw sleeve (27) is fixedly connected to a third support plate (28), the middle of the front side of the fixed column (3) is fixedly connected to a fixed plate (19), and the side of the fixed plate (19) is fixedly connected to the second support plate (20); On one side, the upper and lower ends of the first groove (5) are both provided with a second screw (6), and both ends of the outer wall of the second screw (6) are rotatably connected to the inside of the fixed column (3). On one side, the top of the fixed column (3) is fixedly connected to a first servo motor (7), and the bottom driving end of the first servo motor (7) is fixedly connected to the top of the second screw (6). The outer wall of the second screw (6) is threadedly connected to a first screw sleeve (4), and the outer wall of the first screw sleeve (4) is slidably connected to the inside of the first groove (5). On the other side, the upper and lower ends of the first groove (5) are both fixedly connected to a fixed rod (32), and the outer wall of the fixed rod (32) is slidably connected to a second sliding sleeve (33). The outer wall of the second sliding sleeve (33) is slidably connected to the inside of the first groove (5). The second sliding sleeve (33) and the first screw sleeve (4) are both fixedly connected to a first support plate (8) on the side close to each other. The bottom end of the first support plate (8) is fixedly connected to a scraping plate (9), and the scraping plate (9) is located above the main body (38) of the assembled building exterior wall panel. The front side of the third support plate (28) is fixedly connected to a second electric telescopic rod (29), the front end of the second electric telescopic rod (29) is fixedly connected to a connecting plate (30), the middle part of the front side of the connecting plate (30) is fixedly connected to a scraper (31), both sides of the front side of the connecting plate (30) are fixedly connected to a collecting rack (11), the side of the collecting rack (11) is fixedly connected to both sides of the scraper (31), the bottom end of the collecting rack (11) is provided with a bottom plate (12), the bottom of one side of the collecting rack (11) is fixedly connected to a small stepping motor (26), the driving end of the small stepping motor (26) close to the side of the collecting rack (11) is fixedly connected to a rotating shaft (25), the outer wall of the rotating shaft (25) is fixedly connected to the front side of the bottom plate (12), the two ends of the outer wall of the rotating shaft (25) are rotatably connected to the bottom of the side away from the collecting rack (11), and the bottom plate (12) is located above the box frame (24); The middle part of the bottom end of the second support plate (20) is fixedly connected to the first electric telescopic rod (14), the bottom end of the first electric telescopic rod (14) is fixedly connected to the fixed block (23), the side close to the fixed block (23) is fixedly connected to the spring support body (16), the outer wall of the spring support body (16) is provided with a roller (15) on the end close to the outer wall, and the outer wall of the roller (15) is connected to a film roll (10), and the film roll (10) is located above the main body (38) of the assembled building exterior wall panel.

2. A secondary vibrating and leveling device for assembled building exterior wall panels according to claim 1, characterized in that: A second servo motor (34) is fixedly connected to one side of the side plate (1), and a driving end of the second servo motor (34) close to the side plate (1) is fixedly connected to the first screw (2).

3. The secondary vibrating and leveling device for assembled building exterior wall panels according to claim 1, characterized in that: The bottom end of the box frame (24) is fixedly connected to the top end of the first base (17); the inner wall of the box frame (24) is slidably connected to a plurality of collection boxes (13); second grooves (35) are provided inside both sides of the collection boxes (13); the inner walls of the second grooves (35) are slidably connected to sliders (36); and the sides of the sliders (36) away from the collection boxes (13) are fixedly connected to the middle of the inner wall of the box frame (24).

4. The secondary vibrating and leveling device for assembled building exterior wall panels according to claim 1, characterized in that: An assembled building exterior wall panel body (38) is provided on one side of the second base (21), and the rear side of the assembled building exterior wall panel body (38) is provided on the front side of the first base (17).

5. The secondary vibrating and leveling device for assembled building exterior wall panels according to claim 1, characterized in that: The side of the side plate (1) close to the side below the first screw (2) is fixedly connected to the limit plate (37), and the bottom end of the second screw sleeve (27) is slidably connected to the top surface of the limit plate (37).

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