High-safety mounting bracket

Abstract

The invention discloses a high-safety mounting bracket which comprises a fixing plate arranged at the lower end of the joint of four mounting plates, a receding groove seat and a buffer structure. The multifunctional installation assembly comprises an installation support arranged on the outer side of the buffer structure, an inner positioning support is arranged on the inner side of each fixing plate, a fastener which penetrates through the installation plate and the installation support and is connected to the inner positioning support is arranged at the upper end of each installation plate, connecting pieces are arranged at the bottoms of the fixing plates, and the adjacent fixing plates are connected through the connecting pieces; the fixed supporting structure comprises an outer side fixing support connected with the fastener, the bottom of the outer side fixing support is embedded into the receding groove base, a longitudinal connecting frame is connected to the outer side fixing support in an inserted mode, and the bottom of the longitudinal connecting frame penetrates through the outer side fixing support and the receding groove base and extends to be fixed to the inner positioning support. According to the invention, the connection between the pedals can be more stable, and meanwhile, the guardrail can be stably connected with the bracket and the pedals.

Description

Technical Field

[0001] This invention relates to a mounting bracket, and more particularly to a high-security mounting bracket. Background Technology

[0002] In chemical production processes, many equipment pools contain corrosive liquids. To facilitate safe passage for operators and convenient maintenance, a platform is usually installed above the equipment pool. The suspended platform is supported by a steel frame, and the platforms of the steel frame are then connected and fixed by brackets. In order to reduce weight and ensure strength, the platform often adopts a perforated plate structure, which can easily lead to unstable connections between the plates.

[0003] Traditionally, pedals and guardrails are often fastened together using simple connectors such as rivets or screws. However, in industrial environments with corrosive materials, rising gases can corrode the connection points of the pedals, leading to instability. Therefore, existing systems use partially braced structures, such as using braced steel cables or plates as supports for direct fixation. However, such support structures are less effective for large pedal areas. If a local corner crack occurs at the connection point between pedals, it can easily cause personnel on the pedals to fall directly into the equipment pool below, resulting in a safety accident.

[0004] Therefore, this case aims to provide a high-safety installation bracket that not only makes the connection between the pedals more stable, but also ensures that the guardrail is stably connected to the bracket and the pedals. Summary of the Invention

[0005] This invention provides a high-safety mounting bracket that can effectively solve the above-mentioned problems.

[0006] This invention is implemented as follows: A high-safety mounting bracket includes: a fixing plate disposed at the lower end of the connection of four mounting plates, a clearance groove seat disposed in the middle of the upper end of the fixing plate, and buffer structures disposed on both sides of the clearance groove seat; A multi-functional mounting assembly includes a mounting bracket disposed on the outside of a buffer structure, an inner positioning bracket disposed on the inner side of a fixing plate, a fastener disposed at the upper end of the mounting plate that penetrates the mounting plate and the mounting bracket and is connected to the inner positioning bracket, and a connector disposed at the bottom of the fixing plate, with adjacent fixing plates connected by the connector. A fixed support structure includes an outer fixed bracket connected to a fastener. The bottom of the outer fixed bracket is embedded in a relief groove. A longitudinal connecting bracket is inserted into the outer fixed bracket. The bottom of the longitudinal connecting bracket passes through the outer fixed bracket and the relief groove and extends to be fixed to an inner positioning bracket.

[0007] As a further improvement, the top surface of the fixing plate is provided with a central relief groove, and the bottom end of the central relief groove extends to both sides to provide dovetail grooves. The relief groove seat includes an inner clamping part embedded in the dovetail groove. The upper end of the inner clamping part is provided with a U-shaped receiving groove. The receiving groove is provided with a plurality of relief holes, and the longitudinal connecting frame passes through the relief holes.

[0008] As a further improvement, the buffer structure is a U-shaped structure, with the outer side of the buffer structure attached to the mounting bracket and the inner side of the buffer structure attached to the top area of ​​the relief slot.

[0009] As a further improvement, the mounting bracket includes a bracket strip fixed to a fixing plate, and the bracket strip has a plurality of through holes.

[0010] As a further improvement, the bottom of the fixing plate is provided with a cross-shaped mounting groove, and a lower sealing plate is locked to the bottom of the fixing plate. The inner positioning bracket includes a first inner connecting plate and a second inner connecting plate fixed in the cross-shaped mounting groove. The first inner connecting plate and the second inner connecting plate form a cross-shaped structure. The first inner connecting plate is provided with a longitudinal connecting bracket fixing hole, and the second inner connecting plate is provided with a mounting bracket fixing hole.

[0011] As a further improvement, the fastener includes a straight portion that passes through the mounting bracket and the inner positioning bracket, and a tapered portion is connected to the top of the straight portion, the tapered portion being embedded in the outer fixing bracket.

[0012] As a further improvement, the connector includes transverse connecting seats disposed on the left and right sides of the lower end of the fixing plate, and diagonal connecting seats are also connected to the lower end of the fixing plate.

[0013] As a further improvement, the longitudinal connecting frame includes an inner mating rod that passes through the relief slot and is threaded onto the inner positioning bracket. An outer connecting rod is sleeved on the outer side of the inner mating rod, and a transverse connecting rod is locked to the top of the outer connecting rod. Adjacent transverse connecting rods are connected by a connecting plate.

[0014] As a further improvement, the outer fixing bracket includes a limiting plate disposed on the outer side of the outer connecting rod. The limiting plate extends to both sides and is provided with a plurality of mating pieces. One of the fasteners under a single mounting plate passes through the mounting plate, the mating pieces, and the mounting bracket and connects to the inner positioning bracket. The other fasteners under a single mounting plate pass through the mounting plate, the mating pieces, and connect to the mounting bracket.

[0015] The beneficial effects of this invention are: Existing brackets often use steel cables or plates for direct fixation. This method is less effective for large-area platforms, and if a corner crack occurs at the connection point between platforms, people on the platforms could easily fall into the equipment pool, causing a safety accident. Therefore, this invention features a high-safety mounting bracket with a fixing plate at the lower end of the mounting plate connection point. This mitigates potential corner cracking of the mounting plate and incorporates a buffer structure on the fixing plate to cushion vibrations during use, greatly reducing the risk of brittle cracking at diagonal points due to corrosion.

[0016] When the buffer structure performs buffering, it does not use existing buffering methods such as springs or dampers. In this invention, an energy-absorbing box is used. That is, the buffer structure is a U-shaped energy-absorbing box filled with particle damping. The movement of the particle damping inside alleviates the vibration of the mounting plate. In addition, the inner and outer sides of the buffer structure are connected to two shock-absorbing parts, which have strong buffering capacity.

[0017] Furthermore, since it does not use steel cables for tying or screws and other fixing methods that could easily damage the mounting plate and affect its stability, this invention, through its multifunctional mounting components, has fasteners at the upper end of the mounting plate that are fully embedded inside the mounting plate, mounting bracket, and inner positioning bracket. These fasteners are not exposed to the outside and come into contact with rising corrosive gases, thus avoiding corrosion and breakage caused by prolonged use. In addition, different mounting plates are connected by connectors, so even if a single mounting plate breaks, it is not easy for people walking on it to fall directly.

[0018] The connector is not just for connecting a single component. In this invention, the connector has a horizontal connecting seat and an oblique connecting seat, which connects a rod by screwing it in, so that there is a place to support the clamp when the mounting plate breaks.

[0019] The mounting plate needs to be fixed to the lower end of the mounting plate with fasteners. However, if the fasteners are exposed to the outside or facing the outside of the equipment pool, they are easily corroded by gas. Therefore, the fastener of the present invention includes a straight part and a tapered part. The straight part serves to pass through and connect, while the tapered part serves to support and countersunk, so that the mounting plate is fixedly supported.

[0020] The mounting plate is located above the equipment pool. To prevent workers from falling into the pool while working on the mounting plate, a longitudinal connecting frame, i.e., a guardrail, is often installed on the mounting plate. However, it is very difficult to fix the guardrail on a mounting plate with only a mesh panel. Therefore, this invention uses a fixed support structure to restrict the left and right movement of the longitudinal connecting frame in the horizontal direction through an outer fixed bracket, while in the vertical direction, the longitudinal connecting frame extends into and connects with the outer fixed bracket, the clearance slot, and the inner positioning bracket, so that the longitudinal connecting frame, i.e., the guardrail, can be stably fixed to the mounting plate, i.e., the pedal.

[0021] If the relief slot is simply welded to the fixing plate, its stability is very unreliable. Therefore, the fixing plate of the present invention has an embedded area, and the relief slot has an embedded structure that can be embedded from the side to form a stable fit. In addition, the relief slot after the fit has a part of the upward protruding structure, which can facilitate the guidance, limiting and supporting of the longitudinal connecting frame.

[0022] The inner side of the fixing plate is not a solid structure. In this invention, a cross-shaped mounting groove is opened inside. After the inner positioning bracket is embedded, it is locked by the lower closing plate. The entire inner positioning bracket needs to be connected at multiple points. Therefore, the inner positioning bracket of this invention has a cross-shaped structure, which allows multiple fixed structures extending from the top to be connected and fixed at multiple points, thereby ensuring the tightness of the connection.

[0023] The outer fixing bracket is not a standard aluminum alloy bracket. In this invention, the outer fixing bracket is an irregularly shaped part. On the one hand, it limits and guides the longitudinal connecting frame in the left and right directions through the limiting plate. On the other hand, it relieves the force of the limiting plate through the extended mating piece, and at the same time provides installation space for the fasteners, making the longitudinal connecting frame very stable. Even if it is leaned on by the staff, it is not easy to move. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 2 This is a top view of the structure of the present invention.

[0027] Figure 3 This is the present invention. Figure 2 Cross-sectional view at point AA.

[0028] Figure 4 This is a bottom view of the fixing plate of the present invention.

[0029] Figure 5 This is a schematic diagram of the structure of the outer fixing bracket and the relief groove seat of the present invention.

[0030] Figure 6 This is a schematic diagram of the internal positioning bracket of the present invention.

[0031] Figure 7 This is a schematic diagram of the structure of the present invention in conjunction with the mounting plate (viewed from below).

[0032] Figure 8 This is a schematic diagram (top view) of the structure of the present invention in conjunction with the mounting plate.

[0033] In the picture: Fixed plate 10, middle clearance groove 11, dovetail groove 12, cross mounting groove 13, lower closing plate 14, clearance groove seat 20, inner clamping part 21, receiving groove 22, buffer structure 30, multi-functional mounting assembly 40, mounting bracket 41, bracket strip 411, through hole 412, inner positioning bracket 42, first inner connecting plate 421, second inner connecting plate 422, longitudinal connecting frame fixing hole 423, mounting bracket fixing hole 424, fastener 43, straight part 431, tapered part 432, connector 44, transverse connecting seat 441, oblique connecting seat 442, outer fixed bracket 51, limiting plate 511, mating piece 512, longitudinal connecting frame 52, inner mating rod 521, outer connecting rod 522, transverse connecting rod 523, connecting plate 524. Detailed Implementation

[0034] All embodiments of the present invention are intended to fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating that the purpose, technical solution, and advantages of the method are clearer. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort indicate or imply the relative importance of the indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] Reference Figures 1 to 8 As shown, a high-safety mounting bracket includes: a fixing plate 10 disposed at the lower end of the connection of four mounting plates, a clearance slot 20 disposed in the middle of the upper end of the fixing plate 10, and buffer structures 30 disposed on both sides of the clearance slot 20; a multi-functional mounting assembly 40, including a mounting bracket 41 disposed outside the buffer structure 30, an inner positioning bracket 42 disposed inside the fixing plate 10, a fastener 43 disposed at the upper end of the mounting plate penetrating the mounting plate and the mounting bracket 41 and connected to the inner positioning bracket 42, a connector 44 disposed at the bottom of the fixing plate 10, and adjacent fixing plates 10 being connected by the connector 44; and a fixed support structure, including an outer fixing bracket 51 connected to the fastener 43, the bottom of the outer fixing bracket 51 being embedded in the clearance slot 20, a longitudinal connecting bracket 52 inserted into the outer fixing bracket 51, and the bottom of the longitudinal connecting bracket 52 penetrating the outer fixing bracket 51 and the clearance slot 20 and extending and fixed to the inner positioning bracket 42.

[0037] Existing brackets often use steel cables or plates for direct fixation. This method of fixing is relatively weak for large-area pedals. If a local corner crack occurs at the connection point between pedals, it is easy for people on the pedals to fall into the equipment pool, causing a safety accident. Therefore, this invention uses a high-safety mounting bracket with a fixing plate 10 directly at the lower end of the mounting plate connection point to mitigate the possibility of corner cracks in the mounting plate. Furthermore, a buffer structure 30 is provided on the fixing plate 10 to cushion the vibrations experienced by the mounting plate during use, greatly preventing brittle cracking at the diagonal position when the mounting plate is corroded.

[0038] When the buffer structure 30 performs buffering, it does not use existing buffering methods such as springs or dampers. In this embodiment, the buffer structure 30 is a U-shaped structure. The outer side of the buffer structure 30 is attached to the mounting bracket 41, and the inner side of the buffer structure 30 is attached to the top area of ​​the relief slot seat 20. It adopts the energy-absorbing box method, that is, the buffer structure 30 is a U-shaped energy-absorbing box filled with particle damping. The movement of the particle damping inside relieves the vibration of the mounting plate. The inner and outer sides of the buffer structure 30 are respectively connected to two shock-absorbing parts, which have strong buffering capacity.

[0039] Furthermore, since it does not use steel cables for tying or screws and other fixing methods that could easily damage the mounting plate and affect its stability, the present invention uses a multi-functional mounting component 40. This component has fasteners 43 at the upper end of the mounting plate, which are fully embedded in the mounting plate, mounting bracket 41, and inner positioning bracket 42. The fasteners 43 are not exposed on the outside and come into contact with rising corrosive gases, thus avoiding corrosion and breakage caused by long-term use. In addition, the different mounting plates 10 are connected by connectors 44, so even if a single mounting plate breaks, it is not easy for people walking on it to fall directly.

[0040] The connector 44 is not just a single structure. In this embodiment, the connector 44 includes a transverse connector 441 disposed on the left and right sides of the lower end of the fixing plate 10, and an oblique connector 442 is also connected to the diagonal of the lower end of the fixing plate 10. The connector 44 has a transverse connector 441 and an oblique connector 442, which are connected to a rod by screwing in, so that there is a place to support the clamp when the mounting plate breaks.

[0041] The mounting plate 10 needs to be fixed to the lower end of the mounting plate by fasteners 43. However, if the fasteners 43 are exposed to the outside or facing the outside of the equipment pool, they are easily corroded by gas. Therefore, the fasteners 43 in this embodiment include a straight portion 431 that penetrates the mounting bracket 41 and the inner positioning bracket 42. A tapered portion 432 is connected to the top of the straight portion 431. The tapered portion 432 is embedded in the outer fixing bracket 51. The fasteners 43 include the straight portion 431 and the tapered portion 432. The straight portion 431 serves to penetrate and connect, while the tapered portion 432 serves to support and countersunk, so that the mounting plate 10 is fixedly supported.

[0042] The mounting plate is located above the equipment pool. To prevent workers from falling into the equipment pool while working on the mounting plate, a longitudinal connecting frame 52, i.e., a guardrail, is often installed on the mounting plate. However, it is very difficult to fix the guardrail on a mesh mounting plate. Therefore, this invention uses a fixed support structure to restrict the left and right movement of the longitudinal connecting frame 52 in the horizontal direction through the outer fixed bracket 51, while in the vertical direction, the longitudinal connecting frame 52 extends into and connects with the outer fixed bracket 51, the clearance slot seat 20, and the inner positioning bracket 42, so that the longitudinal connecting frame 52, i.e., the guardrail, can be stably fixed on the mounting plate, i.e., the pedal.

[0043] If the relief slot seat 20 is simply welded to the fixing plate 10, its stability is very unreliable. Therefore, in this embodiment, the top surface of the fixing plate 10 is provided with a central relief slot 11, and the bottom end of the central relief slot extends to both sides to provide dovetail slots 12. The relief slot seat 20 includes an inner clamping part 21 embedded in the dovetail slot. The upper end of the inner clamping part 21 is provided with a U-shaped receiving groove 22. The receiving groove 22 is provided with several relief holes. The longitudinal connecting frame 52 passes through the relief holes. The fixing plate 10 itself has an embedded area, and the relief slot seat 20 is provided with an embedded structure, which can be embedded from the side to form a stable fit. In addition, the relief slot seat 20 after the fit also has a part of the upward protruding structure, which can facilitate the guidance, limiting and supporting of the longitudinal connecting frame 52.

[0044] Since the recessed seat 20 is provided with an upwardly protruding receiving groove 22, in order to avoid the hollowing out of other places, the mounting bracket 41 is provided with an upwardly protruding setting in this embodiment. Specifically, the mounting bracket 41 includes a bracket strip 411 fixed on the fixing plate 10. The bracket strip 411 has a plurality of through holes 412, which allow the fasteners 43 to pass through and provide a wrapping protection for the fasteners 43.

[0045] The inner side of the fixing plate 10 is not a solid structure. In this embodiment, a cross mounting groove 13 is provided at the bottom of the fixing plate 10, and a lower sealing plate 14 is locked at the bottom of the fixing plate 10. The inner positioning bracket 42 includes a first inner connecting plate 421 and a second inner connecting plate 422 fixed in the cross mounting groove 13. The first inner connecting plate 421 and the second inner connecting plate 422 form a cross-shaped structure. The first inner connecting plate 421 has a longitudinal connecting bracket fixing hole 423, and the second inner connecting plate 422 has a mounting bracket fixing hole 424. The cross mounting groove 13 is opened inside the second inner connecting plate 422. After the inner positioning bracket 42 is embedded, it is locked by the lower sealing plate 14. The entire inner positioning bracket 42 needs to be connected at multiple points. Therefore, the inner positioning bracket 42 of the present invention has a cross-shaped structure, so that multiple fixed structures extending from the top can be connected and fixed at multiple points, thereby ensuring the tightness of the connection.

[0046] The guardrail structure in this embodiment is not a conventional one-piece guardrail. Specifically, the longitudinal connecting frame 52 includes an inner mating rod 521 that passes through the relief slot seat 20 and is threadedly connected to the inner positioning bracket 42. An outer connecting rod 522 is sleeved on the outer side of the inner mating rod 521. A transverse connecting rod 523 is locked to the top of the outer connecting rod 522. Adjacent transverse connecting rods 523 are connected by a connecting plate 524. Through the detachable installation structure, the longitudinal connecting frame 52 can better cooperate with the fixing plate 10.

[0047] The outer fixing bracket 51 is not a standard aluminum alloy bracket. In this embodiment, the outer fixing bracket 51 includes a limiting plate 511 set on the outside of the outer connecting rod 522. The limiting plate 511 extends to both sides and is provided with a number of mating pieces 512. One of the fasteners 43 under a single mounting plate passes through the mounting plate, the mating piece 512, and the mounting bracket 41 and connects to the inner positioning bracket 42. The other fasteners 43 under a single mounting plate pass through the mounting plate, the mating piece 512 and connect to the mounting bracket 41. The outer fixing bracket 51 is an irregularly shaped part. On the one hand, it limits and guides the longitudinal connecting frame 52 in the left and right directions through the limiting plate 511. On the other hand, it relieves the force of the limiting plate 511 through the extended mating pieces 512, and at the same time provides installation space for the fasteners 43, making the longitudinal connecting frame 52 very stable. Even if it is leaned on by the staff, it is not easy to move.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A high-security mounting bracket, characterized in that, include: A fixing plate (10) is set at the lower end of the connection of four mounting plates. A relief groove seat (20) is provided in the middle of the upper end of the fixing plate (10). A buffer structure (30) is provided on both sides of the relief groove seat (20). The multifunctional mounting assembly (40) includes a mounting bracket (41) disposed on the outside of the buffer structure (30), an inner positioning bracket (42) disposed on the inner side of the fixing plate (10), a fastener (43) disposed on the upper end of the mounting plate through the mounting plate and the mounting bracket (41) and connected to the inner positioning bracket (42), and a connector (44) disposed on the bottom of the fixing plate (10), and adjacent fixing plates (10) are connected by the connector (44); The fixed support structure includes an outer fixed bracket (51) connected to a fastener (43), the bottom of which is embedded in a relief slot (20), and a longitudinal connecting bracket (52) is inserted into the outer fixed bracket (51). The bottom of the longitudinal connecting bracket (52) passes through the outer fixed bracket (51) and the relief slot (20) and extends to be fixed to the inner positioning bracket (42).

2. The high-security mounting bracket according to claim 1, characterized in that, The top surface of the fixing plate (10) has a central relief groove (11), and the bottom end of the central relief groove extends to both sides to provide dovetail grooves (12). The relief groove seat (20) includes an inner clamping part (21) embedded in the dovetail groove. The upper end of the inner clamping part (21) is provided with a U-shaped receiving groove (22). The receiving groove (22) is provided with a plurality of relief holes, and the longitudinal connecting frame (52) passes through the relief holes.

3. The high-security mounting bracket according to claim 1, characterized in that, The buffer structure (30) is a U-shaped structure. The outer side of the buffer structure (30) is attached to the mounting bracket (41), and the inner side of the buffer structure (30) is attached to the top area of ​​the relief slot (20).

4. The high-security mounting bracket according to claim 1, characterized in that, The mounting bracket (41) includes a bracket strip (411) fixed on the fixing plate (10), and the bracket strip (411) has a plurality of through holes (412).

5. A high-security mounting bracket according to claim 1, characterized in that, The bottom of the fixing plate (10) is provided with a cross mounting groove (13), and a lower sealing plate (14) is locked to the bottom of the fixing plate (10). The inner positioning bracket (42) includes a first inner connecting plate (421) and a second inner connecting plate (422) fixed in the cross mounting groove (13). The first inner connecting plate (421) and the second inner connecting plate (422) form a cross-shaped structure. The first inner connecting plate (421) is provided with a longitudinal connecting bracket fixing hole (423), and the second inner connecting plate (422) is provided with a mounting bracket fixing hole (424).

6. A high-security mounting bracket according to claim 1, characterized in that, The fastener (43) includes a straight portion (431) that passes through the mounting bracket (41) and the inner positioning bracket (42), and a tapered portion (432) is connected to the top of the straight portion (431), which is embedded in the outer fixing bracket (51).

7. A high-security mounting bracket according to claim 1, characterized in that, The connector (44) includes a transverse connecting seat (441) disposed on the left and right sides of the lower end of the fixing plate (10), and an oblique connecting seat (442) is also connected to the diagonal of the lower end of the fixing plate (10).

8. A high-security mounting bracket according to claim 1, characterized in that, The longitudinal connecting frame (52) includes an inner mating rod (521) that passes through the relief slot seat (20) and is threaded onto the inner positioning bracket (42). An outer connecting rod (522) is sleeved on the outer side of the inner mating rod (521). A transverse connecting rod (523) is locked to the top of the outer connecting rod (522). Adjacent transverse connecting rods (523) are connected by a connecting plate (524).

9. A high-security mounting bracket according to claim 8, characterized in that, The outer fixing bracket (51) includes a limiting plate (511) set on the outside of the outer connecting rod (522). The limiting plate (511) extends to both sides and is provided with a number of mating pieces (512). One of the fasteners (43) under a single mounting plate passes through the mounting plate, the mating piece (512), the mounting bracket (41) and connects to the inner positioning bracket (42). The other fasteners (43) under a single mounting plate pass through the mounting plate, the mating piece (512) and connect to the mounting bracket (41).

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