Cleaning device for aluminum alloy door and window machining

Abstract

The invention relates to the technical field of aluminum alloy door and window machining, and particularly discloses a cleaning device for aluminum alloy door and window machining, which comprises a workbench, a hollow profile is arranged on the workbench, a conveying part, a punching part and a limiting part are arranged on the workbench, and the conveying part is responsible for conveying the hollow profile to a set position; the punching part is used for punching a hollow profile, and the limiting part is used for fixing the hollow profile; and a scraping part is further arranged on the workbench and comprises an inserting rod, a rotary table is arranged at the end of the inserting rod, a telescopic rod is fixedly connected to the top of the rotary table, the telescopic rod is sleeved with an elastic piece, and a scraping piece is fixedly connected to the top of the telescopic rod. According to the cleaning device for aluminum alloy door and window machining, the inserting rod and the supporting rod are arranged, the supporting rod drives the driving gear to rotate in the moving process, the pair of scraping pieces can rotate by half a circle in the hole wall, hole piece residues which are not completely separated are scraped away, and therefore the follow-up cleaning labor force is saved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy door and window processing, and in particular to a cleaning device for aluminum alloy door and window processing. Background Art

[0002] Aluminum alloy doors and windows are usually composed of aluminum alloy profiles, glass, sealing strips, hardware accessories, coatings, filling materials, etc. Through the coordination of these components, aluminum alloy doors and windows can provide good structural stability, sound insulation, heat insulation, waterproof, wind resistance and other performances, meeting the functional requirements of modern buildings for doors and windows. When processing aluminum alloy doors and windows, multiple aluminum alloy profiles need to be punched and assembled.

[0003] However, when drilling holes in the profile, some debris is generated and needs to be cleaned. Usually, the profile only needs to be tilted or blown. But sometimes, due to problems such as drilling force, drilling direction and profile material, some hole pieces are still stuck to the hole wall. Even if the drill bit passes through the hole wall, it is still difficult to completely separate the hole pieces from the hole wall, which requires manual removal later. However, for some long hollow profiles, the hole pieces remain on the hole wall and cannot be cleaned manually. Even if tools are used, the efficiency is poor, which makes it difficult to clean such profiles after drilling. Summary of the invention

[0004] The purpose of the present invention is to provide a cleaning device for aluminum alloy door and window processing to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A cleaning device for processing aluminum alloy doors and windows, comprising a workbench, a hollow profile is arranged on the workbench, a conveying component, a punching component and a limiting component are arranged on the workbench, the conveying component is responsible for transmitting the hollow profile to a set position, the punching component is used to punch holes in the hollow profile, and the limiting component is responsible for fixing the hollow profile; a scraping component is also arranged on the workbench, the scraping component comprises an insertion rod, a turntable is arranged at the end of the insertion rod, a telescopic rod is fixedly connected to the top of the turntable, an elastic member is sleeved on the outside of the telescopic rod, a scraper is fixedly connected to the top of the telescopic rod, and the scraper extends into the hole under the action of the elastic member; a driving component is arranged at the bottom of the turntable, the driving component is used to drive the scraper to rotate and scrape off the hole piece adhered to the hole; a cleaning component is also arranged at the end of the insertion rod, which is responsible for cleaning waste out of the inside of the hollow profile.

[0006] Furthermore, the driving component includes a support rod, a through hole is opened in the insertion rod, the support rod slides inside the insertion rod, the end of the support rod is fixedly connected with a rack plate, the bottom of the turntable is provided with a rotating shaft, the outer end of the rotating shaft is fixedly sleeved with a driving gear, and the rack plate and the driving gear are meshingly connected.

[0007] Furthermore, the end of the insertion rod is fixedly connected to a fixing block, a side end of the fixing block is provided with a round hole, the side end of the fixing block is fixedly connected to a supporting sheet, and the bottom of the rotating shaft is rotatably connected to the top surface of the supporting sheet.

[0008] Furthermore, at least one guide groove is provided on the turntable, a pair of sliders are slidably connected in the guide groove, a pressure spring is fixedly connected between the corresponding pair of sliders, and the scraper is fixedly connected to the corresponding slider.

[0009] Furthermore, the scraper blade is in an L-shaped structure, and includes a planar portion and a curved portion, the planar portion is parallel to the inner wall surface of the profile, and the curved portion is adapted to the inner wall surface of the hole.

[0010] Furthermore, a contraction component is also provided on the turntable, and the contraction component includes a fixed cylinder, the inner wall of the fixed cylinder is fixedly connected with a special-shaped guide rail, the outer wall of the turntable is fixedly connected with a pressure plate, the pressure plate is in contact with the special-shaped guide rail, the bottom of the turntable is fixedly connected with a square rod, the top of the rotating shaft is provided with a square groove, the square rod slides inside the square groove, and a compression spring is provided between the turntable and the inner wall of the fixed cylinder.

[0011] Furthermore, the special-shaped guide rail includes a flat portion and a spiral portion, the flat portion and the spiral portion are connected to each other, the spiral portion is distributed in a downward spiral, and the turntable rotates horizontally first and then rotates downward to retract the scraper into the hollow profile.

[0012] Furthermore, the cleaning component includes multiple first movable shafts, and the outer ends of the first movable shafts are fixedly connected to cleaning brushes. The cleaning brush includes a storage state and an unfolded state. The cleaning brush is in the storage state when entering the hollow profile and in the unfolded state when exiting the hollow profile to clean out the waste residue.

[0013] Furthermore, the cleaning component also includes a fixed rod fixedly connected to the fixed block, the end of the fixed rod is fixedly connected to a support member, the two ends of the first movable shaft are rotatably connected to the second movable shaft, the end of the second movable shaft is fixedly connected to the support member close to it, the end of the rack plate is fixedly connected to a driving disk, the driving disk is fixedly connected to a push plate, and the first movable shaft is fixedly connected to a baffle.

[0014] Furthermore, a limiting component is also provided on the cleaning component, and the limiting component includes a bottom plate rotatably connected to the end of the insertion rod, the side end of the bottom plate is rotatably connected to the limiting plate, and the outer wall of the support rod is fixedly connected with a stopper.

[0015] In the above technical solution, the cleaning device for aluminum alloy door and window processing provided by the present invention has the beneficial effects of: By setting up an insertion rod and a support rod, the drive gear rotates during the movement of the support rod, so that a pair of scrapers can rotate half a circle in the hole wall to scrape off the hole fragments that have not been completely detached, thereby saving the labor for subsequent cleaning; not only that, when the support rod moves, it will also unfold multiple cleaning brushes to further clean the inner wall of the hollow profile, and also bring the scraped hole fragments out of the outside of the hollow profile to achieve the purpose of cleaning.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0017] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of the overall structure from another perspective provided by an embodiment of the present invention; Figure 3 A schematic diagram of the external structure of a scraper component provided in an embodiment of the present invention; Figure 4 A schematic diagram of the coordination structure of a scraper component and a driving component provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a scraper component and a driving component from another perspective provided in an embodiment of the present invention; Figure 6 The embodiment of the present invention provides Figure 5 A schematic diagram of the enlarged structure at point A; Figure 7 A schematic front view of the structure of the telescopic rod and the scraper provided in an embodiment of the present invention; Figure 8 A schematic diagram of a partial structure of a contraction component provided by an embodiment of the present invention; Fig. 9 A schematic diagram of the internal structure of a fixing cylinder provided in an embodiment of the present invention; Fig.10 A schematic diagram of the structure of a cleaning component provided in an embodiment of the present invention; Fig.11 A schematic diagram of the structure of a limiting component provided in an embodiment of the present invention.

[0020] Description of reference numerals: 1. Workbench; 2. Conveying component; 21. First conveying platform; 22. Second conveying platform; 23. Third conveying platform; 3. Punching component; 4. Scraping component; 41. Insertion rod; 42. Turntable; 43. Telescopic rod; 44. Elastic member; 45. Scraper; 451. Plane part; 452. Arc part; 46. Guide groove; 47. Sliding block; 48. Pressure spring; 5. Driving component; 51. Support rod; 52. Rack plate; 53. Rotating shaft; 54. Driving gear; 55. Fixing block ; 56. Support plate; 6. Cleaning component; 61. First movable shaft; 62. Cleaning brush; 63. Fixed rod; 64. Support member; 65. Second movable shaft; 66. Drive disk; 67. Push plate; 68. Block plate; 7. Contraction component; 71. Fixed cylinder; 72. Special-shaped guide rail; 721. Flat portion; 722. Spiral portion; 73. Pressing plate; 74. Square rod; 75. Compression spring; 76. Rotating plate; 8. Limiting component; 81. Bottom plate; 82. Limiting plate; 83. Abutment plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0022] See also Figure 1-4A cleaning device for processing aluminum alloy doors and windows, comprising a workbench 1, on which a hollow profile is arranged, and on which a conveying component 2, a punching component 3 and a limiting component 8 are arranged, wherein the conveying component 2 is responsible for transmitting the hollow profile to a set position, the punching component 3 is used for punching holes in the hollow profile, and the limiting component 8 is responsible for fixing the hollow profile; a scraping component 4 is also arranged on the workbench 1, and the scraping component 4 comprises an insert rod 41, at the end of which a turntable 42 is arranged, a telescopic rod 43 is fixedly connected to the top of the turntable 42, an elastic member 44 is sleeved on the outside of the telescopic rod 43, a scraping blade 45 is fixedly connected to the top of the telescopic rod 43, and the scraping blade 45 extends into the hole under the action of the elastic member 44; a driving component 5 is arranged at the bottom of the turntable 42, and the driving component 5 is used to drive the scraping blade 45 to rotate to scrape off the hole sheet adhered to the hole.

[0023] Aluminum alloy doors and windows are generally assembled from multiple metal profiles, many of which are hollow profiles with hollow interiors, so they need to be punched during assembly.

[0024] Specifically, the conveying component 2 includes a first conveying platform 21, a second conveying platform 22 and a third conveying platform 23. The first conveying platform 21 includes a first hydraulic rod, and the end of the first hydraulic rod is fixedly connected to a transport frame, and a second hydraulic rod is arranged on the transport frame. A clamping plate is slidably connected to the transport frame, and the hollow profile is initially placed on the clamping plate; the second conveying platform 22 includes a plurality of conveyor belts and a support shaft, and the support shaft supports the plurality of conveyor belts. The second conveying platform 22 transports the hollow profile to the bottom of the punching component 3; the third conveying platform 23 includes a plurality of rollers, and the plurality of rollers are driven by a drive motor and are responsible for transporting the hollow profile to the next working line; the punching component 3 includes an L-shaped frame, and a third hydraulic rod is arranged on the side end of the L-shaped frame, and a drill bit is arranged at the bottom of the third hydraulic rod. When the hollow profile is transported to the bottom of the drill bit, the third hydraulic rod is controlled to realize punching of the hollow profile.

[0025] This case takes a circular hole as an example.

[0026] Specifically, a movable groove is provided on the workbench 1, and a support shaft is slidably connected to the movable groove. A support hole is provided on the support shaft. The insertion rod 41 slides in the support hole to support the insertion rod 41. Manual or hydraulic mechanisms can be selected to push the insertion rod 41. After each cleaning is completed, the insertion rod 41 can be removed and the hollow profile can be transported to the next work line.

[0027] See also Figure 5-6 The driving component 5 includes a support rod 51, a through hole is opened in the insertion rod 41, the support rod 51 slides inside the insertion rod 41, the end of the support rod 51 is fixedly connected with a rack plate 52, and a rotating shaft 53 is provided at the bottom of the turntable 42. The outer end of the rotating shaft 53 is fixedly sleeved with a driving gear 54, and the rack plate 52 and the driving gear 54 are meshingly connected.

[0028] The end of the insertion rod 41 is fixedly connected to a fixing block 55 , a round hole is opened at the side end of the fixing block 55 , a supporting sheet 56 is fixedly connected to the side end of the fixing block 55 , and the bottom of the rotating shaft 53 is rotatably connected to the top surface of the supporting sheet 56 .

[0029] The support rod 51 movably penetrates the inside of the circular hole, and the rack plate 52 is meshed with the driving gear 54 and can drive the driving gear 54 to rotate.

[0030] Initially, the hollow profile can be fixed, and then the insertion rod 41 is inserted into the interior of the hollow profile. At this time, the telescopic rod 43 is in a retracted state, and the scraper 45 also contacts the inner top surface of the hollow profile until the scraper 45 reaches the punching position. It moves upward under the action of the elastic member 44, so that the scraper 45 fits the hole wall (the hole drilled by the punching component 3, which will appear later). Then, the support rod 51 is pushed to move with the rack plate 52 and rotate with the driving gear 54 to complete the purpose of scraping the hole wall. If there are metal discs adhering to the hole wall, they will be hung off by the scraper 45.

[0031] At least one guide groove 46 is provided on the turntable 42 , a pair of sliders 47 are slidably connected in the guide groove 46 , a pressure spring 48 is fixedly connected between the corresponding pair of sliders 47 , and the scraper 45 is fixedly connected to the corresponding slider 47 .

[0032] See also Figure 7 The scraper 45 is L-shaped and includes a plane portion 451 and a curved portion 452 . The plane portion 451 is parallel to the inner wall of the profile, and the curved portion 452 is adapted to the inner wall of the hole.

[0033] In order to ensure that the scraper 45 can fit exactly against the hole wall, at least a pair of scrapers 45 needs to be set. In this case, a pair of scrapers 45 is taken as an example. A pressure spring 48 is arranged between the scrapers 45. The pressure spring 48 can enable the pair of scrapers 45 to rest against the hole wall, so that the scraper 45 can fit closely against the hole wall, thereby reducing the difficulty of aligning with the hole wall when actually cleaning the punching residue.

[0034] The scraper 45 is L-shaped and fits the annular inner wall of the hole wall. When the scraper 45 rotates 180 degrees, the residual material of the hole piece that has not completely fallen off can be scraped off. The residual material can fall on the turntable 42 or on the bottom of the hollow profile and be cleaned out by the cleaning component 6 later.

[0035] See also Figure 8-9A contraction component 7 is also provided on the turntable 42, and the contraction component 7 includes a fixed cylinder 71, and the inner wall of the fixed cylinder 71 is fixedly connected with a special-shaped guide rail 72, and the outer wall of the turntable 42 is fixedly connected with a pressing piece 73, and the pressing piece 73 is in conflict with the special-shaped guide rail 72. A square rod 74 is fixedly connected to the bottom of the turntable 42, and a square groove is opened on the top of the rotating shaft 53. The square rod 74 slides inside the square groove, and a compression spring 75 is provided between the turntable 42 and the inner wall of the fixed cylinder 71.

[0036] Specifically, a rotating piece 76 is provided at the bottom of the compression spring 75 , a telescopic tube is provided inside the compression spring 75 , and the rotating piece 76 is fixedly connected to the turntable 42 via the telescopic tube, so as to avoid twisting of the compression spring 75 during rotation.

[0037] The special-shaped guide rail 72 includes a flat portion 721 and a spiral portion 722, which are connected to each other. The spiral portion 722 is distributed in a downward spiral. The turntable 42 rotates horizontally first and then rotates downward to retract the scraper 45 into the hollow profile.

[0038] Initially, when the compression spring 75 is in a stretched state and tends to shrink, the pressing piece 73 contacts the top surface of the special-shaped guide rail 72. At the beginning, the pressing piece 73 is on the parallel portion. When the turntable 42 rotates 180 degrees, a pair of scrapers 45 rotates 180 degrees to scrape off the residual material. Then the pressing piece 73 comes to the spiral portion 722. The turntable 42 continues to rotate, and the pressing piece 73 will carry the turntable 42 downward while rotating until the scraper 45 shrinks to the inside of the hollow profile and is no longer blocked by the hole wall. The insertion rod 41 can be taken out later.

[0039] The end of the insertion rod 41 is also provided with a cleaning component 6, which is responsible for cleaning waste materials out of the hollow profile.

[0040] See also Fig.10 The cleaning component 6 includes a plurality of first movable shafts 61, and a cleaning brush 62 is fixedly connected to the outer end of the first movable shaft 61. The cleaning brush 62 includes a storage state and an unfolded state. The cleaning brush 62 is in the storage state when entering the hollow profile and in the unfolded state when exiting the hollow profile to clean out the waste residue.

[0041] The cleaning component 6 also includes a fixed rod 63 fixedly connected to the fixed block 55, the end of the fixed rod 63 is fixedly connected to a support member 64, the two ends of the first movable shaft 61 are rotatably connected to the second movable shaft 65, the end of the second movable shaft 65 is fixedly connected to the support member 64 close to it, the end of the rack plate 52 is fixedly connected to a drive disk 66, the drive disk 66 is fixedly connected to a push plate 67, and the first movable shaft 61 is fixedly connected to a baffle 68.

[0042] When the support rod 51 moves, it will also move with the driving disk 66. Due to the limitation of the second movable shaft 65 and the support member 64, the first movable shaft 61 is forced to rotate through the blocking piece 68. The cleaning brush 62 can be designed to rotate just 90 degrees, so that the four cleaning brushes 62 are in an unfolded state. The cleaning brush 62 can not only clean the residual dust attached to the hollow profile when punching, but also take out the above-mentioned scraped discs, so as to achieve the purpose of cleaning the inside of the hollow profile after punching.

[0043] See also Fig.11 A limiting component 8 is also provided on the cleaning component 6. The limiting component 8 includes a bottom plate 81 rotatably connected to the end of the insertion rod 41. The side end of the bottom plate 81 is rotatably connected to a limiting plate 82. The outer wall of the support rod 51 is fixedly connected with a stopper 83.

[0044] Specifically, when the resist 83 enters the interior of the insertion rod 41 along with the support rod 51, it will push the limit plate 82 to rotate. When the residue needs to be taken out of the hollow profile, the resist 83 will be restricted by the limit plate 82 when it retreats, so that the cleaning brush 62 can remain in the unfolded state until the residue is cleaned out. Subsequently, the bottom plate 81 or the support rod 51 can be rotated to disengage the resist 83 from the limit plate 82.

[0045] The workbench 1 is also provided with a collecting box, which can collect the residue.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cleaning device for processing aluminum alloy doors and windows, comprising a workbench (1), wherein a hollow profile is arranged on the workbench (1), and wherein: The workbench (1) is provided with a conveying component (2), a punching component (3) and a limiting component (8), wherein the conveying component (2) is responsible for conveying the hollow profile to a set position, the punching component (3) is used for punching holes in the hollow profile, and the limiting component (8) is responsible for fixing the hollow profile; The workbench (1) is also provided with a scraper component (4), the scraper component (4) comprising an insertion rod (41), a turntable (42) being provided at the end of the insertion rod (41), a telescopic rod (43) being fixedly connected to the top of the turntable (42), an elastic member (44) being sleeved on the outside of the telescopic rod (43), a scraper blade (45) being fixedly connected to the top of the telescopic rod (43), and the scraper blade (45) being extended into the hole under the action of the elastic member (44); A driving component (5) is provided at the bottom of the turntable (42), and the driving component (5) is used to drive the scraper (45) to rotate to scrape off the perforated sheet adhered to the hole; The end of the insertion rod (41) is also provided with a cleaning component (6) responsible for cleaning waste materials out of the interior of the hollow profile.

2. The cleaning device for aluminum alloy door and window processing according to claim 1, characterized in that: The driving component (5) comprises a support rod (51), a through hole is formed in the insertion rod (41), the support rod (51) slides inside the insertion rod (41), the end of the support rod (51) is fixedly connected to a rack plate (52), a rotating shaft (53) is provided at the bottom of the turntable (42), a driving gear (54) is fixedly sleeved on the outer end of the rotating shaft (53), and the rack plate (52) and the driving gear (54) are meshingly connected.

3. The cleaning device for aluminum alloy door and window processing according to claim 2, characterized in that: The end of the insertion rod (41) is fixedly connected to a fixing block (55), a side end of the fixing block (55) is provided with a round hole, the side end of the fixing block (55) is fixedly connected to a supporting sheet (56), and the bottom of the rotating shaft (53) is rotatably connected to the top surface of the supporting sheet (56).

4. The cleaning device for aluminum alloy door and window processing according to claim 3, characterized in that: At least one guide groove (46) is provided on the turntable (42), a pair of sliders (47) are slidably connected in the guide groove (46), a pressure spring (48) is fixedly connected between the corresponding pair of sliders (47), and the scraper (45) is fixedly connected to the corresponding slider (47).

5. The cleaning device for aluminum alloy door and window processing according to claim 4, characterized in that: The scraper (45) has an L-shaped structure, and comprises a plane portion (451) and a curved portion (452), wherein the plane portion (451) is parallel to the inner wall surface of the profile, and the curved portion (452) is adapted to the inner wall surface of the hole.

6. The cleaning device for aluminum alloy door and window processing according to claim 5, characterized in that: The turntable (42) is also provided with a contraction component (7), the contraction component (7) comprising a fixed cylinder (71), the inner wall of the fixed cylinder (71) being fixedly connected to a special-shaped guide rail (72), the outer wall of the turntable (42) being fixedly connected to a pressing sheet (73), the pressing sheet (73) being in contact with the special-shaped guide rail (72), the bottom of the turntable (42) being fixedly connected to a square rod (74), the top of the rotating shaft (53) being provided with a square groove, the square rod (74) sliding inside the square groove, and a compression spring (75) being provided between the turntable (42) and the inner wall of the fixed cylinder (71).

7. The cleaning device for aluminum alloy door and window processing according to claim 6, characterized in that: The special-shaped guide rail (72) comprises a flat portion (721) and a spiral portion (722), the flat portion (721) and the spiral portion (722) being connected to each other, the spiral portion (722) being distributed in a downward spiral, and the turntable (42) first rotates horizontally and then rotates downward, so that the scraper (45) is retracted into the hollow profile.

8. The cleaning device for aluminum alloy door and window processing according to claim 7, characterized in that: The cleaning component (6) comprises a plurality of first movable shafts (61), the outer ends of the first movable shafts (61) being fixedly connected with cleaning brushes (62), the cleaning brushes (62) comprising a stowed state and an unfolded state, the cleaning brushes (62) being in the stowed state when entering the hollow profile and in the unfolded state when exiting the hollow profile, thereby cleaning out the waste residue.

9. The cleaning device for aluminum alloy door and window processing according to claim 8, characterized in that: The cleaning component (6) further comprises a fixed rod (63) fixedly connected to the fixed block (55), the end of the fixed rod (63) being fixedly connected to a support member (64), the two ends of the first movable shaft (61) being rotatably connected to a second movable shaft (65), the end of the second movable shaft (65) being fixedly connected to a support member (64) adjacent thereto, the end of the rack plate (52) being fixedly connected to a drive disk (66), the drive disk (66) being fixedly connected to a push plate (67), and the first movable shaft (61) being fixedly connected to a blocking plate (68).

10. The cleaning device for aluminum alloy door and window processing according to claim 9, characterized in that: A limiting component (8) is also provided on the cleaning component (6), the limiting component (8) comprising a bottom plate (81) rotatably connected to the end of the insertion rod (41), the side end of the bottom plate (81) being rotatably connected to a limiting plate (82), and a stopper (83) being fixedly connected to the outer wall of the support rod (51).

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