A sewage treatment pipe quick docking device with a self-contained filtering structure

Abstract

The present invention discloses a sewage treatment pipe quick docking device with a self-contained filtering structure, comprising a fixed connection cylinder, a limiting mechanism, a filter screen, and a bearing mechanism. The left and right ends of the fixed connection cylinder are fixedly connected with fixed plugs for connection. The limiting mechanism is symmetrically arranged at the upper and lower ends of the connection between the fixed connection cylinder and the sewage pipe. The filter screen is fixedly connected to the middle of the mounting frame, and the bearing mechanism is symmetrically arranged at the front and rear sides of the fixed connection cylinder. The sewage treatment pipe quick docking device with a self-contained filtering structure can quickly and conveniently limit the installation and interconnection between sewage pipes. Through the setting of the filter screen, the sewage can be filtered to prevent the sewage pipe from being blocked when used for a long time. Combined with the setting of the fixed plate and the connecting sleeve, it is convenient to clean the filter screen and pollutants at the filter. The structure is simple and very convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field related to sewage treatment, and in particular to a sewage treatment pipeline quick docking device with a self-contained filtering structure. Background Art

[0002] Sewage refers to the discharged water from life and production that has been polluted to a certain extent and has lost its original use function. In the process of sewage discharge, it is necessary to use sewage pipes to transport and discharge sewage through sewage pipes. In addition, when sewage pipes are discharging sewage, pipe docking devices are needed to dock and install sewage pipes.

[0003] However, the commonly used sewage treatment pipe docking device still has the following shortcomings:

[0004] 1. The existing sewage treatment pipe docking device has a poor supporting effect on the sewage pipe during actual use, and is prone to tilting, loosening or even tipping, affecting the actual sewage discharge effect;

[0005] 2. The existing sewage treatment pipe docking device is inconvenient to dock and install between pipes, has a complex structure, cumbersome operation, and poor sealing, which is prone to leakage;

[0006] 3. The existing sewage treatment pipe docking device is not convenient for filtering and cleaning pollutants in the sewage, resulting in the pipe being easily blocked during the long-term sewage discharge process, affecting the transportation of sewage.

[0007] Therefore, we propose a sewage treatment pipe quick docking device with a self-contained filtering structure to solve the above-mentioned problems. Summary of the invention

[0008] The purpose of the present invention is to provide a quick-connect device for sewage treatment pipes with a built-in filtering structure to solve the problems raised by the above-mentioned background technology that, in actual use, the sewage pipe has a poor supporting effect, is prone to tilting, loosening or even tipping, affecting the actual sewage discharge effect, the connection and installation between pipes are inconvenient, the structure is complex, the operation is cumbersome, and the sealing is poor, which is prone to leakage, making it inconvenient to filter and clean pollutants in the sewage, resulting in the pipe being easily blocked during long-term sewage discharge, affecting the transportation of sewage.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a quick docking device for sewage treatment pipes with a self-contained filtering structure, comprising a fixed connecting cylinder, both left and right ends of the fixed connecting cylinder are fixedly connected with fixed plugs for connection, and the fixed plugs penetrate and connect inside the sewage pipe, and a first sealing ring is fitted at the connection between the fixed connecting cylinder and the sewage pipe;

[0010] The outer diameter of the fixed intubation tube is equal to the inner diameter of the sewage pipe.

[0011] Also includes:

[0012] A limiting mechanism, wherein the limiting mechanism is symmetrically arranged at the upper and lower ends of the connection between the fixed connection cylinder and the sewage pipe, and the limiting mechanism is used to limit the position between the fixed connection cylinder and the sewage pipe;

[0013] The limiting mechanism includes a connecting block fixedly connected to the upper and lower edges of the fixed connecting tube, a fixing clamp plate for extrusion limiting, a fixing block fixedly connected to the fixing clamp plate on the side away from the horizontal center axis of the fixed connecting tube, a fixing bolt with a thread on the outer surface and a connecting rod with limiting function;

[0014] A filter screen, which is fixedly connected to the middle of the mounting frame, and is used to filter sewage inside the fixed connection cylinder, and the mounting frame drives the filter screen to form a disassembly structure inside the fixed connection cylinder through the fixing plate and the connecting sleeve;

[0015] The bearing mechanism is symmetrically arranged on the front and rear sides of the fixed connection cylinder, and the bearing mechanism is used to support the fixed connection cylinder and the sewage pipe.

[0016] Preferably, the middle part of the fixing clamp is connected with the connecting rod through and through, and the fixing clamp is used to clamp and fix the sewage pipe, and the fixing clamp forms a relative rotation structure between the fixing block and the fixing bolt, and the fixing bolt and the connecting block are connected by means of threads;

[0017] Wherein, the connecting rod is fixedly connected to the side surface of the fixed connecting cylinder.

[0018] Preferably, a second sealing ring is tightly fitted at the connection between the mounting frame and the fixed connecting tube, and fixed plates with a limiting function are provided on the left and right sides of the upper end of the mounting frame, and the fixed plates are hingedly connected to the upper end of the fixed connecting tube, and a first torsion spring is provided at the connection between the fixed plate and the fixed connecting tube.

[0019] Preferably, the fixing plate forms a flip structure at the upper end of the fixed connecting tube, and the fixing plate is connected to the mounting frame by snapping, and the fixing plate is connected to a connecting column with threads on the outer surface by a slot.

[0020] Preferably, the connecting column is connected to a connecting sleeve for locking by means of threads, and the connecting sleeve is fitted on the upper surface of the fixing plate, and the connecting column is fixedly connected to the left and right sides of the upper end of the mounting frame.

[0021] Preferably, the bearing mechanism includes a bearing frame for supporting, a mounting block fixedly connected to the upper end of the bearing frame, a positioning block fixedly connected to the lower end of the mounting block, a movable block for connecting and a connecting bolt with a limiting function.

[0022] Preferably, the mounting block is connected to the fixing rod in a "U"-shaped structure by a slot, and the mounting block drives the positioning block to be inserted on the outside of the movable block, and the movable block is slidably connected to the outer surface of the fixing rod;

[0023] Wherein, the fixing rod is fixedly connected to the front and rear sides of the fixing connection cylinder by bolts.

[0024] Preferably, a spring is sleeved on the outer surface of the lower end of the fixed rod, and the movable end of the spring is fixedly connected to the movable block, and the movable block, the connecting bolt and the fixed rod, as well as the movable block, the connecting bolt and the positioning block are all threadedly connected.

[0025] Preferably, a fixing pin with a positioning function is fixedly connected to the lower end of the carrier, and a limiting rod with a purpose of limiting is rotatably connected to the inner side of the lower end of the carrier, and the limiting rod is inserted into the connecting groove, and the connecting grooves are respectively opened at the front and rear ends of the positioning plate;

[0026] Wherein, a second torsion spring is arranged at the connection between the limiting rod and the supporting frame.

[0027] Compared with the prior art, the invention has the following beneficial effects: the sewage treatment pipe quick docking device with a self-contained filtering structure, in actual use, the fixed plug is plugged into the middle of the sewage pipe, combined with the setting of the limiting mechanism, the limiting mechanism is symmetrically arranged at the upper and lower ends of the connection between the fixed connection cylinder and the sewage pipe, the limiting mechanism includes a connecting block, a fixed clamping plate, a fixed block, a fixing bolt and a connecting rod, which can very quickly and conveniently limit the fixed connection cylinder and the sewage pipe, thereby realizing the mutual communication between the sewage pipe and the sewage pipe, and through the setting of the filter net, the sewage can be filtered to prevent the sewage pipe from being blocked in a state of long-term use, and the practicability is high, combined with the setting of the fixed plate and the connecting sleeve, it is convenient to clean the filter net and the pollutants at the filter, and through the setting of the bearing mechanism, the fixed connection cylinder and the sewage pipe can be supported, so that the connection between the fixed connection cylinder and the sewage pipe is more stable, and the sewage can be better transported and discharged, and through the setting of the first sealing ring and the second sealing ring, the sealing is good to prevent leakage;

[0028] 1. A fixed insert and a limiting mechanism are provided. The fixed insert is inserted into the interior of the sewage pipe. Combined with the setting of the limiting mechanism, the limiting mechanism includes a connecting block, a fixed splint, a fixed block, a fixing bolt and a connecting rod. The limiting mechanism is symmetrically arranged at the upper and lower ends of the connection between the fixed connecting cylinder and the sewage pipe, which can quickly and conveniently perform installation and limiting between the fixed connecting cylinder and the sewage pipe, and realize the mutual connection between the fixed connecting cylinders;

[0029] 2. It is equipped with a filter screen, a fixing plate and a connecting sleeve. The filter screen is arranged inside the fixing connecting cylinder, and the filter screen is fixedly connected to the middle of the mounting frame. Through the setting of the filter screen, pollutants in the sewage can be filtered. At the same time, combined with the setting of the fixing plate and the connecting sleeve, the filter screen can be driven by the mounting frame to form a disassembly structure inside the fixing connecting cylinder, which is convenient for cleaning the filter screen and pollutants at the filtering position;

[0030] 3. A bearing mechanism and a positioning plate are provided. The bearing mechanism is symmetrically arranged on the front and rear sides of the fixed connecting cylinder. At the same time, the bearing mechanism includes a bearing frame, a mounting block, a positioning block, a movable block and a connecting bolt. Combined with the setting of the positioning plate, the fixed connecting cylinder can be supported with good stability, preventing the fixed connecting cylinder and the sewage pipe from tilting and tipping over during the sewage transportation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the front view cutaway structure of the present invention;

[0032] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0033] Figure 3 It is a schematic diagram of a top view of the structure of the connection between the mounting frame, the fixing plate and the fixing connecting tube of the present invention;

[0034] Figure 4 This is a front view structural diagram of the connection between the filter screen, the mounting frame and the connecting column of the present invention;

[0035] Figure 5 This is a front view structural diagram of the connection between the fixing plate, the connecting column and the connecting sleeve of the present invention;

[0036] Figure 6 It is a schematic diagram of the front view and cross-section structure of the connection between the fixing splint, the fixing block and the fixing bolt of the present invention;

[0037] Figure 7 It is a schematic diagram of the side view structure of the connection between the fixed connection tube and the bearing frame of the present invention;

[0038] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0039] Fig. 9 This is a schematic diagram of the overall structure of the connection between the sewage pipe and the sewage pipe of the present invention;

[0040] Fig.10 It is a schematic diagram of the side view structure of the connection between the fixed rod, the mounting block and the movable block of the present invention;

[0041] Fig.11 It is a schematic diagram of the side view structure of the connection between the positioning plate and the limiting rod of the present invention.

[0042] In the figure: 1. fixed connecting cylinder; 2. fixed insert; 3. sewage pipe; 4. first sealing ring; 5. limiting mechanism; 6. connecting block; 7. fixed splint; 8. fixing block; 9. fixing bolt; 10. connecting rod; 11. filter screen; 12. mounting frame; 13. second sealing ring; 14. fixing plate; 15. first torsion spring; 16. connecting column; 17. connecting sleeve; 18. fixing rod; 19. spring; 20. bearing mechanism; 21. bearing frame; 22. mounting block; 23. positioning block; 24. movable block; 25. connecting bolt; 26. fixing pin; 27. positioning plate; 28. connecting groove; 29. ​​limiting rod; 30. second torsion spring. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0044] See also Figure 1-11 The present invention provides a technical solution: a quick docking device for sewage treatment pipes with a self-contained filtering structure, comprising a fixed connecting cylinder 1, a fixed insert 2, a sewage pipe 3, a first sealing ring 4, a limiting mechanism 5, a connecting block 6, a fixed splint 7, a fixed block 8, a fixing bolt 9, a connecting rod 10, a filter screen 11, a mounting frame 12, a second sealing ring 13, a fixing plate 14, a first torsion spring 15, a connecting column 16, a connecting sleeve 17, a fixing rod 18, a spring 19, a bearing mechanism 20, a bearing frame 21, a mounting block 22, a positioning block 23, a movable block 24, a connecting bolt 25, a fixing pin 26, a positioning plate 27, a connecting groove 28, a limiting rod 29 and a second torsion spring 30.

[0045] When using the sewage treatment pipe quick docking device with a self-contained filtering structure, Figure 1 , Figure 2 , Figure 6 and Fig. 9As shown, both left and right ends of the fixed connection tube 1 are fixedly connected with fixed plugs 2, which are inserted into the interior of the sewage pipe 3. At the same time, the outer diameter of the fixed plug 2 is equal to the inner diameter of the sewage pipe 3, and a first sealing ring 4 is fitted at the connection between the fixed connection tube 1 and the sewage pipe 3. Through the setting of the first sealing ring 4, a certain sealing effect can be achieved, and the fixed connection tube 1 and the sewage pipe 3 are quickly connected and limited by a limiting mechanism 5. The limiting mechanism 5 includes a connecting block 6 fixedly connected to the upper and lower edges of the fixed connection tube 1, a fixed splint 7 for extrusion limiting, a fixed block 8 fixedly connected to the fixed splint 7 away from the horizontal central axis of the fixed connection tube 1, a fixing bolt 9 with a thread on the outer surface, and a connecting rod 10 with a limiting function.

[0046] First, align the connecting rod 10 with the middle of the fixed splint 7, and insert the connecting rod 10 into the fixed splint 7. The fixed splint 7 is used to clamp and limit the sewage pipe 3. The fixed splint 7 is fixedly connected to a fixed block 8 on the side away from the horizontal central axis of the fixed connecting tube 1. The middle of the fixed block 8 is rotatably connected to a fixing bolt 9, and then the fixing bolt 9 is rotated. The fixing bolt 9 rotates in the middle of the fixing block 8. At the same time, the fixing bolt 9 and the connecting block 6 are connected by threads, which drives the fixed splint 7 to fit with the sewage pipe 3, so that the fixed connecting tube 1 and the sewage pipe 3 can be connected and limited very conveniently.

[0047] After the connection between the fixed connection cylinder 1 and the sewage pipe 3 is completed, Figure 1 , Figure 4 , Figure 7 , Figure 8 and Fig.10 As shown, a bearing mechanism 20 is provided at both the front and rear ends of the fixed connection tube 1, and the fixed connection tube 1 is supported on the ground by the bearing mechanism 20. The bearing mechanism 20 includes a bearing frame 21 for support, a mounting block 22 fixedly connected to the upper end of the bearing frame 21, a positioning block 23 fixedly connected to the lower end of the mounting block 22, a movable block 24 for connection and a connecting bolt 25 with a limiting function. The front and rear ends of the fixed connection tube 1 are fixedly connected to a fixed rod 18 with a "U"-shaped structure by bolts. A spring 19 is sleeved on the outer surface of the fixed rod 18. The movable end of the spring 19 is fixedly connected to the movable block 24. The movable block 24 is pulled downward, and the movable block 24 slides on the fixed rod 18. The movable block 24 squeezes the spring 19, so that the spring 19 undergoes elastic deformation.

[0048] Then, the mounting block 22 is connected with the fixing rod 18 by a slot, and the movable block 24 is released at the same time. At this time, the spring 19 restores its elastic deformation, and the lower end of the mounting block 22 is fixedly connected with a positioning block 23. The spring 19 pushes the movable block 24 to slide upward, and the positioning block 23 is inserted into the outer side of the movable block 24 to limit the position between the movable block 24 and the mounting block 22. Then, the connecting bolt 25 for fixing is rotated. The connecting bolt 25, the movable block 24 and the positioning block 23, as well as the connecting bolt 25, the movable block 24 and the fixing rod 18 are all threadedly connected, and the fixing rod 18, the movable block 24 and the mounting block 22 are further limited and fixed, so as to facilitate the installation between the carrier frame 21 and the fixed connecting tube 1.

[0049] A fixing pin 26 is provided at the lower end of the support frame 21, and the fixing pin 26 is buried in the ground, and the support frame 21 is used to support the fixed connection tube 1 and the sewage pipe 3. Figure 7 and Fig.11 As shown, the lower end of the carrier 21 is rotatably connected to the limiting rod 29, and a second torsion spring 30 is provided at the connection between the limiting rod 29 and the carrier 21. The limiting rod 29 is rotated, and the second torsion spring 30 is elastically deformed. Then, the limiting rod 29 is inserted into the front and rear ends of the positioning plate 27, and the limiting rod 29 is released. At this time, the second torsion spring 30 restores its elastic deformation, and the positioning plate 27 and the carrier 21 are limited, as shown in FIG. Figure 7 In the state shown, the positioning plate 27 is provided to limit the connection between the supporting frames 21 and the supporting frames 21, thereby improving the overall stability.

[0050] In addition, in the process of transporting and discharging sewage, such as Figure 1 and Figure 4 As shown, a filter screen 11 is arranged inside the fixed connection cylinder 1, and the filter screen 11 is fixedly connected to the middle part of the mounting frame 12. At the same time, the lower end of the mounting frame 12 is engaged with the inner side of the lower end of the fixed connection cylinder 1. A second sealing ring 13 is arranged at the connection between the upper end of the mounting frame 12 and the fixed connection cylinder 1, and the sealing performance is good. Through the arrangement of the filter screen 11, pollutants in sewage can be filtered, and the practicability is high. At the same time, the mounting frame 12 drives the filter screen 11 through the fixing plate 14 and the connecting sleeve 17 to form a disassembly structure inside the fixed connection cylinder 1, and the filter screen 11 and the pollutants filtered out by the filter screen 11 can be cleaned regularly.

[0051] When the pollutants need to be cleaned, the valve for sewage transportation is closed (not shown in the figure), such as Figure 1 , Figure 3 and Figure 5As shown, by rotating the connecting sleeve 17 threadedly connected to the outer surface of the connecting column 16, the connecting sleeve 17 is disengaged from the connecting column 16, and the connecting sleeve 17 releases the limit between the fixing plate 14 and the connecting column 16. The connecting column 16 is connected to the fixing plate 14 by a slot, and the fixing plate 14 is snap-connected with the upper end of the mounting bracket 12. Then the fixing plate 14 is rotated, and the fixing plate 14 is flipped at the upper end of the fixed connecting cylinder 1. A first torsion spring 15 is provided at the connection between the fixing plate 14 and the fixed connecting cylinder 1. The first torsion spring 15 is elastically deformed, and the fixing plate 14 releases the limit between the mounting bracket 12 and the fixed connecting cylinder 1. Then the mounting bracket 12 is pulled upward, and the mounting bracket 12 drives the filter screen 11 to be pulled out from the inside of the fixed connecting cylinder 1, so as to facilitate the cleaning of the filter screen 11 and the pollutants filtered out by the filter screen 11. The operation is convenient and the use is very convenient.

[0052] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment pipe quick docking device with a self-contained filtering structure, comprising a fixed connection cylinder (1), both left and right ends of the fixed connection cylinder (1) being fixedly connected with fixed plugs (2) for connection, and the fixed plugs (2) being connected through the interior of a sewage pipe (3), and a first sealing ring (4) being fitted at the connection between the fixed connection cylinder (1) and the sewage pipe (3); in, The outer diameter of the fixed insert (2) is equal to the inner diameter of the sewage pipe (3). It is characterized by further comprising: A limiting mechanism (5), the limiting mechanism (5) being symmetrically arranged at the upper and lower ends of the connection between the fixed connection cylinder (1) and the sewage pipe (3), and the limiting mechanism (5) being used to limit the position between the fixed connection cylinder (1) and the sewage pipe (3); The limiting mechanism (5) comprises a connecting block (6) fixedly connected to the upper and lower edges of the fixed connecting tube (1), a fixing clamp (7) for extrusion limiting, a fixing block (8) fixedly connected to the fixing clamp (7) on a side away from the horizontal center axis of the fixed connecting tube (1), a fixing bolt (9) with a threaded outer surface, and a connecting rod (10) with a limiting function; A filter screen (11), the filter screen (11) being fixedly connected to the middle portion of the mounting frame (12), and the filter screen (11) being used to filter sewage inside the fixed connection cylinder (1), and the mounting frame (12) drives the filter screen (11) through the fixing plate (14) and the connecting sleeve (17) to form a disassembly structure inside the fixed connection cylinder (1); A bearing mechanism (20), the bearing mechanism (20) being symmetrically arranged at the front and rear sides of the fixed connection cylinder (1), and the bearing mechanism (20) being used to support the fixed connection cylinder (1) and the sewage pipe (3); The bearing mechanism (20) comprises a bearing frame (21) for supporting, a mounting block (22) fixedly connected to the upper end of the bearing frame (21), a positioning block (23) fixedly connected to the lower end of the mounting block (22), a movable block (24) for connecting, and a connecting bolt (25) with a limiting function; The mounting block (22) is connected to the fixed rod (18) in a U-shaped structure by a slot, and the mounting block (22) drives the positioning block (23) to be inserted on the outside of the movable block (24), and the movable block (24) is slidably connected to the outer surface of the fixed rod (18); Wherein, the fixing rod (18) is fixedly connected to the front and rear sides of the fixing connection cylinder (1) by means of bolts; A spring (19) is sleeved on the outer surface of the lower end of the fixed rod (18), and the movable end of the spring (19) is fixedly connected to the movable block (24), and the movable block (24), the connecting bolt (25) and the fixed rod (18), and the movable block (24), the connecting bolt (25) and the positioning block (23) are all threadedly connected; A fixing pin (26) having a positioning function is fixedly connected to the lower end of the carrier (21), and a limiting rod (29) having a limiting function is rotatably connected to the inner side of the lower end of the carrier (21), and the limiting rod (29) is inserted into a connecting groove (28), and the connecting grooves (28) are respectively provided at the front and rear ends of the positioning plate (27); Wherein, a second torsion spring (30) is provided at the connection between the limiting rod (29) and the supporting frame (21).

2. A sewage treatment pipe quick docking device with a self-contained filtering structure according to claim 1, characterized in that: The middle part of the fixing clamp (7) is connected to the connecting rod (10) through the fixing clamp (7), and the fixing clamp (7) is used to clamp and fix the sewage pipe (3), and the fixing clamp (7) forms a relative rotation structure through the fixing block (8) and the fixing bolt (9), and the fixing bolt (9) is connected to the connecting block (6) by means of a thread; Wherein, the connecting rod (10) is fixedly connected to the side surface of the fixed connecting cylinder (1).

3. A sewage treatment pipe quick docking device with a self-contained filtering structure according to claim 1, characterized in that: A second sealing ring (13) is tightly fitted at the connection between the mounting frame (12) and the fixed connection tube (1), and fixed plates (14) with a limiting function are arranged on both left and right sides of the upper end of the mounting frame (12), and the fixed plate (14) is hingedly connected to the upper end of the fixed connection tube (1), and a first torsion spring (15) is arranged at the connection between the fixed plate (14) and the fixed connection tube (1).

4. A sewage treatment pipe quick docking device with a self-contained filtering structure according to claim 3, characterized in that: The fixing plate (14) forms a flip structure at the upper end of the fixed connection tube (1), and the fixing plate (14) and the mounting frame (12) are connected by means of a snap fit, and the fixing plate (14) and a connecting column (16) having a threaded outer surface are connected by means of a snap fit.

5. A sewage treatment pipe quick docking device with a self-contained filtering structure according to claim 4, characterized in that: The connecting column (16) is connected to a connecting sleeve (17) for locking by means of threads, and the connecting sleeve (17) is fitted on the upper surface of the fixing plate (14), and the connecting column (16) is fixedly connected to the left and right sides of the upper end of the mounting frame (12).

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