Indoor fine decoration suspended ceiling suspender hole forming device
By combining the combination structure of the support base, hole drill and drive motor in the boom forming device, the body weight is used to reduce manual pushing force, the problem of high labor intensity when the traditional boom forming device is drilled in concrete is solved, and the problem of high labor intensity is improved. Punching efficiency and convenience.
Patent Information
- Application Number
- CN202421018381.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-11
AI Technical Summary
In construction projects, traditional boom hole forming devices require a lot of manual force to drill holes due to the high hardness of concrete, resulting in high labor intensity for operators and long-term operation, which affects efficiency.
A well-decorated ceiling boom hole-forming device is designed, using a combined structure of support base, open hole electric drill, drive motor and wire rope, and using the body weight to reduce manual pushing force, and automatic hole punching is achieved through the PLC controller and drive motor. Reduce labor intensity.
It realizes that there is no need to manually push the hole drill in a large number of hole punching work, saves effort with the help of your own weight, reduces the labor intensity of the operator, and improves the efficiency and convenience of the hole punching.
Smart Images

Figure CN222201132U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hole-forming devices, in particular to a hole-forming device for indoor fine decoration ceiling suspension rods. Background Art
[0002] In construction projects, hangers are the hangers for horizontal pipelines such as power and low-voltage cable trays and HVAC ducts, and are the load-bearing rods for ceiling keels in decoration projects. The traditional method of installing hangers in projects generally uses a gantry scaffolding mobile platform. The installers stand on the mobile platform to drill holes at the hanger installation location, and then install the hanger with expansion bolts into the holes.
[0003] An existing indoor fine decoration ceiling hanging rod hole-making device (Announcement No.: CN211276639U) has at least the following disadvantages:
[0004] When drilling holes, a person needs to push the handrail of the horizontal bar and use the lever principle to adjust the height of the drilling device to drill holes. However, when drilling holes, due to the hardness of the concrete, a lot of force is required to push the drilling motor upward. At the same time, when drilling a large number of holes, the long-term manual pushing for the drilling operation will be more labor-intensive, making the drilling process more tiring and increasing the labor intensity of the operator. Utility Model Content
[0005] The utility model aims to solve the shortcomings in the prior art and proposes a hole-forming device for indoor fine decoration ceiling suspension rods.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A hole-forming device for a suspended ceiling rod of indoor fine decoration, comprising a support base, a support tube is arranged on the top surface of the support base, a hole-making electric drill is arranged on the top surface of the support tube, a PLC controller is fixedly installed on the outer circular wall surface of the support tube, the hole-making electric drill is electrically connected to the PLC controller, a support bin is arranged on the top surface of the support base, a drive motor is fixedly sleeved on the inner circular wall surface of the support bin, the drive motor is electrically connected to the PLC controller, the support bin is fixedly installed on the bottom surface of the support tube, a moving tube is movably sleeved on the inner circular wall surface of the support tube, a fixing plate is fixedly installed on the inner circular wall surface of the moving tube, a first threaded hole is arranged on the top surface of the fixing plate, a second threaded column is threadedly connected to the inner circular wall surface of the first threaded hole, the second threaded column is fixedly installed on the top surface of the driving shaft of the drive motor, a first limiting hole is arranged on the outer circular wall surface of the support tube, a first limiting plate is movably sleeved inside the first limiting hole, and the top of the first limiting plate The top surface of the support base is provided with a first support plate, and the second support plate is connected to the support base through a hinge. The first support plate is fixedly installed on the top surface of the support base, and the first limit plate is fixedly installed on the moving tube. The first limit plate is fixedly installed on the outer circular wall of the support tube, and the outer circular wall of the support tube is fixedly installed on the U-shaped plate, and the first circular through hole is respectively opened on the two sides of the U-shaped plate, and a rotating column is movably sleeved on the inner surface of the U-shaped plate, and the first support plate is movably sleeved on the first circular through hole. The top surface of the support base is provided with a connecting plate, and a second circular through hole is opened on one side of the connecting plate. A fixing column is movably sleeved on the inner circular wall of the second circular through hole, and the fixing column is fixedly installed on the first support plate. A supporting hole is opened on the top surface of the connecting plate, and a second threaded hole is opened on one side of the connecting plate. The third threaded column is threadedly connected to the inner circular wall of the second threaded hole. The steel wire rope passes through the interior of the U-shaped plate, rests on the outer circular wall of the rotating column, and passes downward through the interior of the supporting hole.
[0008] As a further solution of the utility model, a second limit plate is fixedly installed on the outer circular wall surface of the support tube, and the steel wire rope passes through the interior of the second limit plate.
[0009] As a further solution of the utility model, a second limiting hole is opened on the top surface of the support base, and a fourth threaded column is movably sleeved on the inner circular wall surface of the second limiting hole. The fourth threaded column is fixedly installed on the bottom surface of the support bin, and a threaded ring is threadedly connected to the outer circular wall surface of the fourth threaded column.
[0010] As a further solution of the utility model, a third limiting hole is opened on the top surface of the support base, and a limiting column is movably sleeved inside the third limiting hole, and the limiting column is fixedly installed on the bottom surface of the support bin.
[0011] As a further solution of the utility model, a second support plate is fixedly installed on the outer circular wall surface of the movable tube, and two clamps are fixedly installed on one side of the second support plate, and the clamps bind and fix the hole-opening electric drill.
[0012] As a further solution of the utility model, a third threaded hole is opened on the top surface of the support base, and a first threaded column is threadedly connected to the inner circular wall surface of the third threaded hole.
[0013] As a further solution of the present utility model, the first threaded column is made of stainless steel.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. Through the coordinated use of the support base, support tube, hole-opening electric drill, first threaded column, support bin, support bin, drive motor and first limit hole, it is possible to achieve the effect of drilling holes in wall top concrete, etc. In the case of a large amount of drilling work, there is no need to manually push the hole-opening electric drill for assistance. With the help of one's own weight, the foot-assisted operation saves effort and avoids the lack of manual strength, thereby reducing the labor intensity of the operator, avoiding affecting the drilling effect, and facilitating use.
[0016] 2. Through the mutual use of the second limit plate and the wire rope, the effect of limiting the second limit plate can be achieved. Through the mutual use of the set second limit hole, the threaded ring and the support tube, the effect of splitting the support base and the support tube for transportation can be achieved. Through the mutual use of the set limit column, the third limit hole and the support bin, the effect of preventing the support bin from rotating can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of a hole-forming device for a ceiling suspension rod for indoor fine decoration proposed by the utility model;
[0018] Figure 2 This is a schematic diagram of the support base structure of a hole-making device for a suspended ceiling rod for indoor fine decoration proposed by the utility model;
[0019] Figure 3 for Figure 2 Schematic diagram of the local structure of A;
[0020] Figure 4 for Figure 2 Schematic diagram of the local structure of B;
[0021] Figure 5 for Figure 2 Schematic diagram of the local structure of C.
[0022] In the figure: 1. support base; 2. support tube; 3. hole-opening electric drill; 4. first threaded column; 5. support bin; 6. drive motor; 7. first limit hole; 8. moving tube; 9. fixed plate; 10. first threaded hole; 11. second threaded column; 12. first limit plate; 13. wire rope; 14. U-shaped plate; 15. rotating column; 16. first support plate; 17. connecting plate; 18. fixed column; 19. support hole; 20. second threaded hole; 21. third threaded column; 22. second limit plate; 23. second limit hole; 24. fourth threaded column; 25. threaded ring; 26. third limit hole; 27. limit column; 28. second support plate; 29. third threaded hole. DETAILED DESCRIPTION
[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] Reference Figure 1-Figure 5A hole-forming device for a ceiling suspender rod of indoor fine decoration comprises a support base 1, a support tube 2 is arranged on the top surface of the support base 1, a hole-forming electric drill 3 is arranged on the top surface of the support tube 2, a PLC controller is fixedly installed on the outer circular wall surface of the support tube 2, the hole-forming electric drill 3 is electrically connected to the PLC controller, a support bin 5 is arranged on the top surface of the support base 1, a drive motor 6 is fixedly sleeved on the inner circular wall surface of the support bin 5, the drive motor 6 is electrically connected to the PLC controller, the support bin 5 is fixedly installed on the bottom surface of the support tube 2, and a movable motor 6 is movably sleeved on the inner circular wall surface of the support tube 2 The inner wall of the supporting tube 2 is provided with a first limiting hole 7, and the first limiting hole 7 is movably sleeved with a first limiting plate 12. The top surface of the first limiting plate 12 is fixedly installed with a wire rope 13. The first limiting plate 12 is fixedly installed with the mobile tube 8. The outer wall of the supporting tube 2 is provided with a first limiting hole 7, and the first limiting hole 7 is movably sleeved with a first limiting plate 12. The top surface of the first limiting plate 12 is fixedly installed with a wire rope 13. The first limiting plate 12 is fixedly installed with the mobile tube 8. The outer wall of the supporting tube 2 is fixedly installed with a first limiting hole 7, and the first limiting hole 7 is movably sleeved with a first limiting plate 12. The top surface of the first limiting plate 12 is fixedly installed with a wire rope 13. The first limiting plate 12 is fixedly installed with the mobile tube 8. A U-shaped plate 14 is installed, and first circular through holes are respectively opened on both sides of the U-shaped plate 14. A rotating column 15 is movably sleeved inside the U-shaped plate 14. The U-shaped plate 14 is movably sleeved with the first circular through hole. A first supporting plate 16 is arranged on the top surface of the supporting base 1. A hinge is fixedly installed on the outer circular wall surface of the supporting bin 5. The first supporting plate 16 is connected to the supporting bin 5 through a hinge. A metal gasket is fixedly installed on the outside of the supporting bin 5. The gasket is U-shaped, and the U-shaped surface is fixedly installed with the supporting bin 5. The bottom of the U-shaped metal gasket is a plane to ensure that the metal gasket and the hinge can be fixedly installed. A connecting plate 17 is provided on one side of the rotating column 15, a second circular through hole is opened on one side of the connecting plate 17, a fixing column 18 is movably sleeved on the inner circular wall of the second circular through hole, the fixing column 18 is fixedly installed with the first supporting plate 16, a supporting hole 19 is opened on the top surface of the connecting plate 17, a second threaded hole 20 is opened on one side of the connecting plate 17, a third threaded column 21 is threadedly connected to the inner circular wall of the second threaded hole 20, the wire rope 13 passes through the inside of the U-shaped plate 14, rests on the outer circular wall of the rotating column 15, and passes downward through the inside of the supporting hole 19.
[0027] Through the provided support base 1, when the user needs to drill a hole in the concrete on the roof, the drilling electric drill 3 is placed on the top of the second support plate 28 through the provided second support plate 28, and then the drilling electric drill 3 is fixed through the provided two clamps, and then the support tube 2 is picked up to drive the support base 1 to move, so as to move the drilling electric drill 3 to the position where a hole needs to be drilled, and at this time, the provided drive motor 6 is further started to drive the second threaded column 11 to rotate, and the second threaded column 11 rotates inside the first threaded hole 10, and at the same time, the internal first limiting plate 12 is limited through the provided first limiting hole 7 to prevent the moving tube 8 from rotating inside the support tube 2, so that the first threaded hole 10 and the second threaded column 1 1 converts the rotary motion into linear motion, so that the fixed plate 9 drives the moving tube 8 to move upward, and the moving tube 8 drives the top electric drill 3 to move upward, so that the drill bit is close to the drilling position. At this time, if the drill bit of the electric drill 3 fails to align with the marked drilling position, the driving motor 6 is started to rotate in the opposite direction, so that the moving tube 8 drives the electric drill 3 to move downward, thereby further adjusting the positions of the supporting base 1, the supporting tube 2 and the electric drill 3. After the adjustment, the drill bit is against the drilling position, and the electric drill 3 is started to rotate through the PLC controller. At this time, the second threaded column 11 is driven by the set driving motor 6 to move the moving tube 8 and the electric drill 3 upward, but the thrust may be insufficient, and the drill bit may have difficulty entering the interior of the concrete. Therefore, by setting the third threaded column 21, the third threaded column 21 is rotated so that it no longer squeezes and fixes the wire rope 13 inside the support hole 19, and then, the bottom end of the wire rope 13 is grasped and pulled downward. At this time, the rotating column 15 supports the wire rope 13, so that the other end of the wire rope 13 gives an upward pulling force to the first limit plate 12. At the same time, the wire rope 13 is in a taut state, and the third threaded column 21 is rotated so that one end of the third threaded column 21 enters the inside of the support hole 19, thereby squeezing the wire rope 13 inside the support hole 19 and fixing the wire rope 13 to a certain extent. At this time, the wire rope 13 at the bottom of the support hole 19 is wrapped around the outside of the connecting plate 17, or knotted, etc., so that the wire rope 13 and the connecting plate 17 are connected. When the first support plate 16 is connected together, there will be no slippage. At this time, the driving motor 6 is started, and at the same time, the user steps on the first support plate 16 to make the first support plate 16 rotate around the hinge, so that the first support plate 16 drives the connecting plate 17 and the wire rope 13 to pull downward, and further makes the other end of the wire rope 13 pull the supporting tube 2 upward. Since the power of the foot is large, even equal to the weight of a human body, the hole-opening electric drill 3 can be pushed more strongly to avoid insufficient manual power. At the same time, there is no need for manual pushing, which saves effort. After the drilling is completed, release the foot and start the driving motor 6 to rotate in the opposite direction, so as to achieve the effect of drilling holes in the wall top concrete, etc. When a large amount of drilling work is done, there is no need to manually push the hole-opening electric drill for assistance. With the help of one's own weight,The pedal assist saves effort and avoids the lack of manual force, which reduces the labor intensity of the operator, avoids affecting the punching effect, and is convenient to use.
[0028] In this embodiment, a second limiting plate 22 is fixedly installed on the outer circular wall surface of the support tube 2, and the wire rope 13 passes through the inside of the second limiting plate 22. A second limiting hole 23 is opened on the top surface of the support base 1, and a fourth threaded column 24 is movably sleeved on the inner circular wall surface of the second limiting hole 23. The fourth threaded column 24 is fixedly installed with the bottom surface of the support bin 5, and a threaded ring 25 is threadedly connected on the outer circular wall surface of the fourth threaded column 24. A third limiting hole 26 is opened on the top surface of the support base 1, and a limiting column 27 is movably sleeved inside the third limiting hole 26. The limiting column 27 is fixedly installed with the bottom surface of the support bin 5. A second supporting plate 28 is fixedly installed on the outer circular wall surface of the mobile tube 8, and two clamps are fixedly installed on one side of the second supporting plate 28. The clamp binds and fixes the hole-opening electric drill 3. A third threaded hole 29 is opened on the top surface of the support base 1, and a first threaded column 4 is threadedly connected on the inner circular wall surface of the third threaded hole 29. The material of the first threaded column 4 is stainless steel.
[0029] Through the second limiting plate 22, the wire rope 13 is inside the second limiting plate 22, and then the second limiting plate 22 limits the moving range of the wire rope 13. Through the second limiting hole 23, when the support base 1 and the support tube 2 are packaged for transportation, the threaded ring 25 can be rotated to disassemble them, thereby pulling the support tube 2 upward to drive the support bin 5 and the fourth threaded column 24 to move upward, thereby disassembling the support base 1 and the support tube 2, and thus separating the support base 1 and the support tube 2 for transportation. Through the limiting column 27, the limiting column 27 is inside the third limiting hole 26, and the third limiting hole 26 limits the limiting column 27 and the support bin 5 to prevent the support bin 5 from rotating.
[0030] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:
[0031] Through the provided support base 1, when the user needs to drill a hole in the concrete on the roof, the drilling electric drill 3 is placed on the top of the second support plate 28 through the provided second support plate 28, and then the drilling electric drill 3 is fixed through the provided two clamps, and then the support tube 2 is picked up to drive the support base 1 to move, so as to move the drilling electric drill 3 to the position where a hole needs to be drilled, and at this time, the provided drive motor 6 is further started to drive the second threaded column 11 to rotate, and the second threaded column 11 rotates inside the first threaded hole 10, and at the same time, the internal first limit plate 12 is limited through the provided first limit hole 7 to prevent the moving tube 8 from rotating inside the support tube 2, so that the first threaded hole 10 and the second threaded column 11 are rotated. 11 converts the rotational motion into linear motion, so that the fixed plate 9 drives the moving tube 8 to move upward, and the moving tube 8 drives the top electric drill 3 to move upward, so that the drill bit is close to the drilling position. At this time, if the drill bit of the electric drill 3 fails to align with the marked drilling position, the driving motor 6 is started to rotate in the opposite direction, so that the moving tube 8 drives the electric drill 3 to move downward, thereby further adjusting the positions of the supporting base 1, the supporting tube 2 and the electric drill 3. After the adjustment, the drill bit is against the drilling position, and the electric drill 3 is started to rotate by the PLC controller. At this time, the second threaded column 11 is driven by the set driving motor 6 to move the moving tube 8 and the electric drill 3 upward, but the thrust may be insufficient, and the drill bit may have difficulty entering the inner part of the concrete. The third threaded column 21 is set, and the third threaded column 21 is rotated so that it no longer squeezes and fixes the wire rope 13 inside the support hole 19. Then, the bottom end of the wire rope 13 is grabbed and pulled downward. At this time, the rotating column 15 supports the wire rope 13, so that the other end of the wire rope 13 gives an upward pulling force to the first limit plate 12. At the same time, the wire rope 13 is in a taut state, and the third threaded column 21 is rotated so that one end of the third threaded column 21 enters the inside of the support hole 19, thereby squeezing the wire rope 13 inside the support hole 19 and fixing the wire rope 13 to a certain extent. At this time, the wire rope 13 at the bottom of the support hole 19 is wrapped around the outside of the connecting plate 17, or knotted, etc., so that the wire rope 13 and the connecting plate 17 are connected together without slipping. At this time, the driving motor 6 is started, and at the same time, the user steps on the first supporting plate 16 to rotate the first supporting plate 16 around the hinge, so that the first supporting plate 16 drives the connecting plate 17 and the wire rope 13 to pull downward, and further makes the other end of the wire rope 13 pull the supporting tube 2 upward. Since the power of the foot is large, even equal to the weight of a human body, the hole-opening electric drill 3 can be pushed more strongly to avoid insufficient manual power. At the same time, there is no need to push it manually, which saves effort. After the drilling is completed, release the foot and start the driving motor 6 to rotate in the opposite direction, thereby achieving the effect of drilling holes in the wall top concrete, etc. In the case of a large amount of drilling work, there is no need to manually push the hole-opening electric drill for assistance.With the help of one's own weight, the pedal assist saves effort and avoids the lack of manual force, which reduces the labor intensity of the operator, avoids affecting the punching effect, and is convenient to use.
[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A hole-making device for a ceiling rod of an indoor fine decoration, comprising a support base (1), a support tube (2) being arranged on the top surface of the support base (1), a hole-making electric drill (3) being arranged on the top surface of the support tube (2), a PLC controller being fixedly mounted on the outer circular wall surface of the support tube (2), and the hole-making electric drill (3) being electrically connected to the PLC controller. It is characterized in that The top surface of the support base (1) is provided with a support bin (5), the inner circular wall surface of the support bin (5) is fixedly sleeved with a drive motor (6), the drive motor (6) is electrically connected to the PLC controller, the support bin (5) is fixedly mounted on the bottom surface of the support tube (2), the inner circular wall surface of the support tube (2) is movably sleeved with a moving tube (8), the inner circular wall surface of the moving tube (8) is fixedly mounted with a fixing plate (9), the top surface of the fixing plate (9) is provided with a first threaded hole (10), the inner circular wall surface of the first threaded hole (10) is The support tube (2) is threadedly connected to a second threaded column (11), the second threaded column (11) is fixedly mounted on the top surface of the drive shaft of the drive motor (6), the outer circular wall surface of the support tube (2) is provided with a first limiting hole (7), the first limiting hole (7) is movably sleeved with a first limiting plate (12), the top surface of the first limiting plate (12) is fixedly mounted with a steel wire rope (13), the first limiting plate (12) is fixedly mounted with the moving tube (8), the outer circular wall surface of the support tube (2) is fixedly mounted with a U-shaped plate (14), the U-shaped plate A first circular through hole is respectively provided on both sides of the U-shaped plate (14); a rotating column (15) is movably sleeved inside the U-shaped plate (14); the U-shaped plate (14) is movably sleeved with the first circular through hole; a first support plate (16) is provided on the top surface of the support base (1); a hinge is fixedly installed on the outer circular wall surface of the support bin (5); the first support plate (16) is connected to the support bin (5) via a hinge; a connecting plate (17) is provided on one side of the rotating column (15); a second circular through hole is provided on one side of the connecting plate (17) The inner wall surface of the second circular through hole is movably sleeved with a fixing column (18), the fixing column (18) is fixedly mounted on the first support plate (16), the top surface of the connecting plate (17) is provided with a supporting hole (19), a second threaded hole (20) is provided on one side of the connecting plate (17), the inner wall surface of the second threaded hole (20) is threadedly connected with a third threaded column (21), the steel wire rope (13) passes through the inside of the U-shaped plate (14), rests on the outer wall surface of the rotating column (15), and passes downward through the inside of the supporting hole (19).
2. A hole-making device for ceiling suspension rods for indoor fine decoration according to claim 1, It is characterized in that A second limit plate (22) is fixedly mounted on the outer circular wall surface of the support tube (2), and the steel wire rope (13) passes through the interior of the second limit plate (22).
3. A hole-making device for ceiling suspension rods for indoor fine decoration according to claim 1, It is characterized in that A second limiting hole (23) is formed on the top surface of the support base (1); a fourth threaded column (24) is movably sleeved on the inner circumferential wall surface of the second limiting hole (23); the fourth threaded column (24) is fixedly mounted on the bottom surface of the support bin (5); and a threaded ring (25) is threadedly connected to the outer circumferential wall surface of the fourth threaded column (24).
4. A hole-making device for ceiling suspension rods for indoor fine decoration according to claim 1, It is characterized in that A third limiting hole (26) is provided on the top surface of the support base (1), a limiting column (27) is movably sleeved inside the third limiting hole (26), and the limiting column (27) is fixedly mounted on the bottom surface of the support bin (5).
5. A hole-making device for ceiling suspension rods for indoor fine decoration according to claim 1, It is characterized in that A second support plate (28) is fixedly mounted on the outer circular wall surface of the movable tube (8), and two clamps are fixedly mounted on one side of the second support plate (28), wherein the clamps bind and fix the hole-opening electric drill (3).
6. A hole-making device for ceiling suspension rods for indoor fine decoration according to claim 1, It is characterized in that A third threaded hole (29) is provided on the top surface of the support base (1), and a first threaded column (4) is threadedly connected to the inner circular wall surface of the third threaded hole (29).
7. A hole-making device for ceiling suspension rods for indoor fine decoration according to claim 6, It is characterized in that The first threaded column (4) is made of stainless steel.
