Logistics vehicle disinfection channel

Abstract

The utility model discloses a logistics vehicle disinfection channel, and belongs to the technical field of disinfection equipment. The disinfection fog pile overcomes the defects that in the prior art, a disinfection fog pile is fixed to the ground through bolts, installation and disassembly are troublesome, roads are damaged, and the disinfection fog pile is not suitable for temporary disinfection operation on logistics vehicles. The device mainly comprises a top beam, a top spray head is installed on the top beam, a first vertical beam and a second vertical beam are rotationally installed on the two sides of the top beam respectively, side spray heads are installed on the first vertical beam and the second vertical beam, and the bottom of the left side of the top beam is rotationally connected with the inner end of the top of the first vertical beam through a first rotating shaft; supporting plates are installed on the front side and the rear side of the top of the second vertical beam correspondingly. The right side of the top beam is located between the supporting plates on the two sides and rotationally connected with the supporting plates on the two sides through a second rotating shaft. The front side and the rear side of the first vertical beam and the front side and the rear side of the second vertical beam are each provided with a rotating seat, and supporting legs are rotationally installed on the rotating seats.

Description

Technical Field

[0001] The utility model belongs to the technical field of disinfection equipment, and in particular relates to a disinfection channel for logistics vehicles. Background Art

[0002] Logistics vehicles sometimes need to be disinfected when entering a logistics transfer station or a delivery station. Currently, when performing disinfection operations on logistics vehicles, disinfection fog piles are generally installed on both sides of the lane. Multiple nozzles are installed on the disinfection fog piles. When a vehicle passes by, the multiple nozzles jointly spray disinfection spray onto the exterior of the vehicle. Many of the current disinfection fog piles are fixed to the ground by bolts, which is not only troublesome to install and disassemble, but also causes damage to the road. They are not suitable for temporary disinfection operations on logistics vehicles. In order to solve the above problems, the utility model proposes a logistics vehicle disinfection channel, which is movable and easy to disassemble and assemble, and is suitable for temporary disinfection operations on logistics vehicles. Summary of the invention

[0003] The utility model aims to provide a disinfection channel for logistics vehicles to overcome the defects in the prior art that the disinfection fog piles are fixed to the ground by bolts, which is not only troublesome to install and disassemble, but also causes damage to the road and is not suitable for temporary disinfection operations on logistics vehicles.

[0004] The utility model is implemented by adopting the following technical scheme: a disinfection channel for logistics vehicles, comprising a top beam, on which a plurality of top nozzles are installed at intervals along the length direction, a first vertical beam and a second vertical beam are rotatably installed on both sides of the top beam, a plurality of side nozzles are installed at intervals along the length direction, the bottom of the left side of the top beam is rotatably connected to the inner end of the top of the first vertical beam through a first rotating shaft, a first rotating locking structure is provided between the first vertical beam and the top beam, support plates are respectively installed on the front and rear sides of the top of the second vertical beam, the right side of the top beam is between the support plates on both sides and is rotatably connected to the support plates on both sides through a second rotating shaft, a second rotating locking structure is provided between the second vertical beam and the top beam; a rotating seat is respectively installed on the front and rear sides of the first vertical beam and the front and rear sides of the second vertical beam, a supporting leg is rotatably installed on the rotating seat, and a third rotating locking structure is provided between the supporting leg and the rotating seat.

[0005] Furthermore, the first rotation locking structure includes a first threaded hole opened on the top surface of the first vertical beam and a first top beam hole opened on the left side of the top surface of the top beam and matching with the first threaded hole, and a first positioning bolt can be inserted between the first threaded hole and the first top beam hole; the first rotation locking structure also includes a first fixing plate rotatably installed on the lower side of the first vertical beam through a rotating shaft, a first fixing hole is opened on the first fixing plate, and a first limiting hole matching with the first fixing hole is opened on the right side of the side of the top beam, and a first positioning pin can be inserted between the first fixing hole and the first limiting hole.

[0006] Furthermore, the second rotation locking structure includes a second threaded hole on the top surface of the second vertical beam and a second top beam hole on the right side of the top surface of the top beam and matching with the second threaded hole, and a second positioning bolt can be inserted between the second threaded hole and the second top beam hole; the second rotation locking structure also includes a second fixing plate rotatably installed on the lower side of the second vertical beam through a rotating shaft, a second fixing hole is provided on the second fixing plate, and a second limiting hole matching with the second fixing hole is provided on the left side of the side of the top beam, and a second positioning pin can be inserted between the second fixing hole and the second limiting hole.

[0007] Furthermore, the rotating seat includes two side plates, and the supporting legs are between the two side plates and are rotatably connected to the two side plates via a third rotating shaft.

[0008] Furthermore, the third rotation locking structure includes a first side panel hole and a second side panel hole opened on the side panel, and a positioning hole opened on the supporting leg and respectively matching with the first side panel hole and the second side panel hole, a third positioning pin can be inserted between the positioning hole and the first side panel hole, and a third positioning pin can be inserted between the positioning hole and the second side panel hole.

[0009] Furthermore, the top beam, the first vertical beam and the second vertical beam are all provided with inner cavities, and water pipes are installed in the inner cavities of the top beam, the first vertical beam and the second vertical beam, the top nozzle is connected to the water pipe in the top beam, the side nozzle on the first vertical beam is connected to the water pipe in the first vertical beam, and the side nozzle on the second vertical beam is connected to the water pipe in the second vertical beam.

[0010] Furthermore, the water pipes on the top beam, the water pipes on the first vertical beam and the water pipes on the second vertical beam are all made of stainless steel pipes.

[0011] Furthermore, a roller is installed at the bottom of the supporting leg; the roller is a universal wheel with a brake.

[0012] Furthermore, threaded holes are provided at the bottom of the first vertical beam and the second vertical beam, threaded rods are installed in the threaded holes, a pressure seat is installed at the bottom of the threaded rod, and a rubber pad is installed on the bottom surface of the pressure seat.

[0013] Furthermore, a pad is installed on the left side of the first vertical beam; handles are installed on the left and right sides of the front side of the top beam, and handles are installed on the left and right sides of the rear side of the top beam.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The folding and unfolding of the utility model is very convenient, and it is not only convenient for storage but also convenient for movement, and it will not damage the road surface when in use. It is very suitable for temporary disinfection operations of logistics vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 A partial enlarged view of point Ⅰ in the middle;

[0018] Figure 3 It is the front view of the utility model;

[0019] Figure 4 It is a three-dimensional diagram of the utility model after folding;

[0020] Figure 5 yes Figure 4 A partial enlarged view of point II in the middle.

[0021] In the figure: 1. top beam; 2. top nozzle; 3. first vertical beam; 4. second vertical beam; 5. side nozzle; 6. first rotating shaft; 7. support plate; 8. second rotating shaft; 9. support leg; 10. first threaded hole; 11. first top beam hole; 12. first positioning bolt; 13. first fixing plate; 14. first fixing hole; 15. first limiting hole; 16. first positioning pin; 17. second threaded hole; 18. second top beam hole; 19. second positioning bolt; 20. second fixing plate; 21. second fixing hole; 22. second limiting hole; 23. second positioning pin; 24. side plate; 25. third rotating shaft; 26. first side plate hole; 27. second side plate hole; 28. third positioning pin; 29. ​​inner cavity; 30. water pipe; 31. roller; 32. threaded rod; 33. pressure seat; 34. pad; 35. handle. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] A disinfection channel for logistics vehicles comprises a top beam 1, on which a plurality of top spray heads 2 are installed at intervals along the length direction, an inner cavity 29 is formed in the top beam 1, and water pipes 30 are installed in the inner cavity 29 on the top beam 1. The water pipes 30 are made of high-pressure resistant stainless steel pipes, and the water inlet of the stainless steel pipes passes through the inner cavity 29 of the top beam 1. The top spray heads 2 are connected to the water pipes 30 in the top beam 1. When in use, a water pump conveys disinfectant to the water pipes 30 of the top beam 1 through a liquid inlet pipe, and the disinfectant is sprayed from the plurality of top spray heads 2 in the water pipes 30 of the top beam 1. The top spray heads 2 are arranged downward to disinfect the vehicle.

[0024] The first vertical beam 3 and the second vertical beam 4 are rotatably mounted on both sides of the top beam 1. The first vertical beam 3 and the second vertical beam 4 are both spaced apart along the length direction and a plurality of side spray heads 5 are installed. The first vertical beam 3 and the second vertical beam 4 are both provided with inner cavities 29. Water pipes 30 are installed in the inner cavities 29 of the first vertical beam 3 and the second vertical beam 4. The side spray heads 5 on the first vertical beam 3 are connected to the water pipes 30 in the first vertical beam 3, and the side spray heads 5 on the second vertical beam 4 are connected to the water pipes 30 in the second vertical beam 4. The water pipes 30 on the first vertical beam 3 and the water pipes 30 on the second vertical beam 4 are both made of high-pressure resistant stainless steel pipes. When in use, the water pump transports the disinfectant to the water pipes 30 on the first vertical beam 3 and the water pipes 30 on the second vertical beam 4 through the liquid inlet pipe, and the disinfectant is sprayed out from the side spray heads 5 on the first vertical beam 3 and the second vertical beam 4. The side spray heads 5 are arranged inwards to disinfect the vehicle.

[0025] The bottom of the left side of the top beam 1 is rotatably connected to the inner end of the top of the first vertical beam 3 via the first rotation axis 6. When the first vertical beam 3 is relatively perpendicular to the top beam 1, the top surface of the first vertical beam 3 contacts the bottom surface of the top beam 1 and restricts the first vertical beam 3 from further rotating outward. The first vertical beam 3 can be rotated 90 degrees inward from a relatively vertical state to a relatively parallel state relative to the top beam 1 via the first rotation axis 6. A first rotation locking structure is provided between the first vertical beam 3 and the top beam 1. The first rotation locking structure can relatively fix the first vertical beam 3 and the top beam 1, so that the first vertical beam 3 cannot rotate relative to the top beam 1.

[0026] The first rotation locking structure includes a first threaded hole 10 opened on the top surface of the first vertical beam 3 and a first top beam hole 11 opened on the left side of the top surface of the top beam 1 and cooperating with the first threaded hole 10. A first positioning bolt 12 can be inserted between the first threaded hole 10 and the first top beam hole 11; when the first vertical beam 3 is rotated to a position relatively perpendicular to the top beam 1, the first threaded hole 10 and the first top beam hole 11 are aligned. At this time, we insert the first positioning bolt 12 into the first top beam hole 11 and screw it into the first threaded hole 10, thereby realizing the relative fixation of the first vertical beam 3 and the top beam 1, and then keeping the first vertical beam 3 and the top beam 1 relatively vertical.

[0027] The first rotation locking structure also includes a first fixing plate 13 rotatably mounted on the lower side of the first vertical beam 3 through a rotating shaft. The first fixing plate 13 can rotate relative to the first vertical beam 3 through the rotating shaft. A first fixing hole 14 is provided on the first fixing plate 13. A first limiting hole 15 matching the first fixing hole 14 is provided on the right side of the side of the top beam 1. A first positioning pin 16 can be inserted between the first fixing hole 14 and the first limiting hole 15. When the first vertical beam 3 rotates to a position relatively parallel to the top beam 1, the first fixing hole 14 and the first limiting hole 15 can be aligned by rotating the first fixing plate 13. At this time, we insert the first positioning pin 16 into the first fixing hole 14 and the first limiting hole 15, thereby achieving relative fixation of the first vertical beam 3 and the top beam 1, thereby keeping the first vertical beam 3 and the top beam 1 relatively horizontal. A pad can be installed on the inner side of the first vertical beam 3. When the pad contacts the bottom surface of the top beam 1, the first vertical beam 3 is parallel to the top beam 1.

[0028] Support plates 7 are installed on the front and rear sides of the top of the second vertical beam 4, respectively. The right side of the top beam 1 is between the two side support plates 7 and is rotatably connected to the two side support plates 7 through the second rotation axis 8. When the second vertical beam 4 is below the top beam 1 and is relatively vertical, the top surface of the second vertical beam 4 contacts the bottom surface of the top beam 1 and limits the second vertical beam 4 from continuing to rotate inward. The second vertical beam 4 can rotate 270 degrees outward from a relatively vertical state to a relatively parallel state relative to the top beam 1 through the second rotation axis 8. A second rotation locking structure is provided between the second vertical beam 4 and the top beam 1. The second rotation locking structure can relatively fix the second vertical beam 4 and the top beam 1, so that the second vertical beam 4 cannot rotate relative to the top beam 1.

[0029] The second rotation locking structure includes a second threaded hole 17 opened on the top surface of the second vertical beam 4 and a second top beam hole 18 opened on the right side of the top surface of the top beam 1 and cooperating with the second threaded hole 17. A second positioning bolt 19 can be inserted between the second threaded hole 17 and the second top beam hole 18. When the second vertical beam 4 is in the unfolded state and is relatively vertical to the top beam 1, the second threaded hole 17 and the second top beam hole 18 are aligned. At this time, the second positioning bolt 19 is inserted into the second top beam hole 18 and screwed into the second threaded hole 17, thereby realizing the relative fixation of the second vertical beam 4 and the top beam 1, and thereby keeping the second vertical beam 4 and the top beam 1 relatively vertical.

[0030] The second rotation locking structure also includes a second fixing plate 20 rotatably mounted on the lower side of the second vertical beam 4 through a rotating shaft. The second fixing plate 20 can rotate relative to the second vertical beam 4 through the rotating shaft. A second fixing hole 21 is provided on the second fixing plate 20. A second limiting hole 22 matching the second fixing hole 21 is provided on the left side of the side of the top beam 1. A second positioning pin 23 can be inserted between the second fixing hole 21 and the second limiting hole 22. When the second vertical beam 4 rotates 270 degrees outward from the vertical state to a position relatively parallel to the top beam 1, the second fixing hole 21 and the second limiting hole 22 can be aligned by rotating the second fixing plate 20. At this time, we insert the second positioning pin 23 into the second fixing hole 21 and the second limiting hole 22, thereby achieving relative fixation of the second vertical beam 4 and the top beam 1, and thereby keeping the second vertical beam 4 and the top beam 1 relatively horizontal. A cushion block can be installed on the inner side of the second vertical beam 4. When the cushion block contacts the top surface of the top beam 1, the second vertical beam 4 is parallel to the top beam 1.

[0031] The front and rear sides of the first vertical beam 3 and the front and rear sides of the second vertical beam 4 are respectively installed with rotating seats, and the rotating seats are rotatably installed with support legs 9. The support legs 9 on both sides of the first vertical beam 3 and the support legs 9 on both sides of the second vertical beam 4 can play a good role in supporting the utility model. The support legs 9 can be rotated outward by 30 to 45 degrees from being relatively parallel to the first vertical beam 3 or the second vertical beam 4 to achieve support.

[0032] A third rotation locking structure is provided between the support leg 9 and the rotating seat. The third rotation locking structure of the utility model can relatively fix the support leg 9 and the rotating seat, so that the support leg 9 cannot rotate relative to the rotating seat.

[0033] The rotating seat includes side plates 24 on both sides. The side plates 24 on the rotating seat on both sides of the first vertical beam 3 are fixedly connected to the first vertical beam 3, and the side plates 24 on the rotating seat on both sides of the second vertical beam 4 are fixedly connected to the second vertical beam 4. The supporting legs 9 are between the side plates 24 on both sides and are rotatably connected to the side plates 24 on both sides through the third rotating shaft 25.

[0034] The third rotation locking structure includes a first side plate hole 26 and a second side plate hole 27 provided on the side plate 24, and a positioning hole provided on the support leg 9 and matched with the first side plate hole 26 and the second side plate hole 27 respectively. A third positioning pin 28 can be inserted between the positioning hole and the first side plate hole 26, and a third positioning pin 28 can be inserted between the positioning hole and the second side plate hole 27. When the support leg 9 rotates outward to a certain angle, for example, 30 degrees outward, the first side plate hole 26 is aligned with the positioning hole. At this time, we insert the third positioning pin 28 into the first side plate hole 26 and the positioning hole to achieve relative fixation of the support leg 9 and the rotating seat; when the support leg 9 rotates inward to a certain angle and is parallel to the first vertical beam 3 or the second vertical beam 4, the second side plate hole 27 is aligned with the positioning hole. At this time, we insert the third positioning pin 28 into the second side plate hole 27 and the positioning hole to achieve relative fixation of the support leg 9 and the rotating seat, so that the support leg 9 remains parallel to the first vertical beam 3 or the second vertical beam 4.

[0035] In the present invention, the first positioning pin 16, the second positioning pin 23 and the third positioning pin 28 can all be bolts, and nuts are installed on the bolts.

[0036] The bottom of the support leg 9 is provided with a roller 31; the installation of the roller 31 facilitates the movement of the utility model, and the roller 31 is a universal wheel with a brake. By designing the roller 31 as a universal wheel with a brake, it is not only convenient to move but also convenient to fix the utility model.

[0037] The bottom of the first vertical beam 3 and the second vertical beam 4 are both provided with threaded holes, in which threaded rods 32 are installed, and a pressure seat 33 is installed at the bottom of the threaded rods 32, and a rubber pad is installed on the bottom of the pressure seat 33. The utility model can make the threaded rod 32 rise and fall in the threaded hole by rotating the threaded rod 32, and a nut can be welded on the threaded rod 32 to facilitate the rotation of the threaded rod 32. By rotating the threaded rod 32, the pressure seat 33 can be pressed against the ground, and by installing a rubber pad on the bottom of the pressure seat 33, the base can be pressed and fixed better. In order to enhance the pressing effect, we can make the bottom of the threaded rod 32 rotatably connected to the pressure seat 33.

[0038] A pad 34 is installed on the left side of the first vertical beam 3. By installing the pad 34 on the left side of the first vertical beam 3, the pad 34 can be in contact with the ground after the utility model is folded to avoid the bottom surface of the first vertical beam 3 from contacting the ground; handles 35 are respectively installed on the left and right sides of the front side of the top beam 1, and handles 35 are respectively installed on the left and right sides of the rear side of the top beam 1. By installing the handles 35, the utility model can facilitate the transportation of the utility model.

[0039] When the utility model is in the folded state, as shown in the attached Figure 4-5As shown, the first vertical beam 3 and the second vertical beam 4 are both arranged parallel to the top beam 1, and the first vertical beam 3 is on the lower side of the top beam 1, and the second vertical beam 4 is on the upper side of the top beam 1. At this time, the first positioning pin 16 is inserted into the first fixing hole 14 and the first limiting hole 15, and the second positioning pin 23 is inserted into the second fixing hole 21 and the second limiting hole 22; at the same time, the supporting leg 9 is arranged parallel to the first vertical beam 3 or the second vertical beam 4, and at this time, the third positioning pin 28 is inserted into the second side plate hole 27 and the positioning hole.

[0040] When the utility model is in the unfolded state, as shown in the attached Figure 1-3 As shown, the first vertical beam 3 and the second vertical beam 4 are both arranged vertically with the top beam 1. At this time, the first positioning bolt 12 is inserted into the first top beam hole 11 and screwed into the first threaded hole 10, and the second positioning bolt 19 is inserted into the second top beam hole 18 and screwed into the second threaded hole 17. At the same time, the support leg 9 is rotated outward by a certain angle relative to the first vertical beam 3 or the second vertical beam 4. At this time, the third positioning pin 28 is inserted into the first side plate hole 26 and the positioning hole.

Claims

1. A logistics vehicle disinfection channel, characterized in that: The invention comprises a top beam (1), wherein a plurality of top spray heads (2) are installed at intervals along the length direction of the top beam (1), a first vertical beam (3) and a second vertical beam (4) are rotatably installed on both sides of the top beam (1), and a plurality of side spray heads (5) are installed at intervals along the length direction of the first vertical beam (3) and the second vertical beam (4), the bottom of the left side of the top beam (1) is rotatably connected to the inner end of the top of the first vertical beam (3) via a first rotation axis (6), a first rotation locking structure is provided between the first vertical beam (3) and the top beam (1), support plates (7) are installed at the front and rear sides of the top of the second vertical beam (4), the right side of the top beam (1) is between the support plates (7) on both sides and is rotatably connected to the support plates (7) on both sides via a second rotation axis (8), and a second rotation locking structure is provided between the second vertical beam (4) and the top beam (1); a rotation seat is installed at the front and rear sides of the first vertical beam (3) and the front and rear sides of the second vertical beam (4), a support leg (9) is rotatably installed on the rotation seat, and a third rotation locking structure is provided between the support leg (9) and the rotation seat.

2. The logistics vehicle disinfection channel according to claim 1 is characterized in that: The first rotation locking structure comprises a first threaded hole (10) formed on the top surface of the first vertical beam (3) and a first top beam hole (11) formed on the left side of the top surface of the top beam (1) and cooperating with the first threaded hole (10), wherein a first positioning bolt (12) can be inserted between the first threaded hole (10) and the first top beam hole (11); the first rotation locking structure also comprises a first fixing plate (13) rotatably mounted on the lower side of the first vertical beam (3) via a rotating shaft, wherein a first fixing hole (14) is formed on the first fixing plate (13), and a first limiting hole (15) cooperating with the first fixing hole (14) is formed on the right side of the side surface of the top beam (1), wherein a first positioning pin (16) can be inserted between the first fixing hole (14) and the first limiting hole (15).

3. The logistics vehicle disinfection channel according to claim 1, characterized in that: The second rotation locking structure comprises a second threaded hole (17) formed on the top surface of the second vertical beam (4) and a second top beam hole (18) formed on the right side of the top surface of the top beam (1) and cooperating with the second threaded hole (17), and a second positioning bolt (19) can be inserted between the second threaded hole (17) and the second top beam hole (18); the second rotation locking structure also comprises a second fixing plate (20) rotatably mounted on the lower side of the second vertical beam (4) via a rotating shaft, a second fixing hole (21) formed on the second fixing plate (20), a second limiting hole (22) cooperating with the second fixing hole (21) formed on the left side of the side surface of the top beam (1), and a second positioning pin (23) can be inserted between the second fixing hole (21) and the second limiting hole (22).

4. The logistics vehicle disinfection channel according to claim 1, characterized in that: The rotating seat comprises two side plates (24), and the supporting leg (9) is between the two side plates (24) and is rotatably connected to the two side plates (24) via a third rotating shaft (25).

5. The logistics vehicle disinfection channel according to claim 4, characterized in that: The third rotation locking structure comprises a first side plate hole (26) and a second side plate hole (27) formed on the side plate (24), and a positioning hole formed on the supporting leg (9) and respectively matched with the first side plate hole (26) and the second side plate hole (27); a third positioning pin (28) can be inserted between the positioning hole and the first side plate hole (26), and a third positioning pin (28) can be inserted between the positioning hole and the second side plate hole (27).

6. The logistics vehicle disinfection channel according to claim 1, characterized in that: The top beam (1), the first vertical beam (3) and the second vertical beam (4) are all provided with inner cavities (29), and water pipes (30) are installed in the inner cavities (29) of the top beam (1), the first vertical beam (3) and the second vertical beam (4); the top spray head (2) is connected to the water pipe (30) in the top beam (1), the side spray head (5) on the first vertical beam (3) is connected to the water pipe (30) in the first vertical beam (3), and the side spray head (5) on the second vertical beam (4) is connected to the water pipe (30) in the second vertical beam (4).

7. The logistics vehicle disinfection channel according to claim 6, characterized in that: The water pipe (30) on the top beam (1), the water pipe (30) on the first vertical beam (3) and the water pipe (30) on the second vertical beam (4) are all made of stainless steel pipes.

8. The logistics vehicle disinfection channel according to claim 1, characterized in that: A roller (31) is installed at the bottom of the support leg (9); the roller (31) is a universal wheel with a brake.

9. The logistics vehicle disinfection channel according to claim 1, characterized in that: The bottoms of the first vertical beam (3) and the second vertical beam (4) are both provided with threaded holes, threaded rods (32) are installed in the threaded holes, a pressure seat (33) is installed at the bottom of the threaded rod (32), and a rubber pad is installed on the bottom surface of the pressure seat (33).

10. The logistics vehicle disinfection channel according to any one of claims 1 to 9, characterized in that: A pad (34) is installed on the left side of the first vertical beam (3); handles (35) are installed on the left and right sides of the front side of the top beam (1), and handles (35) are installed on the left and right sides of the rear side of the top beam (1).

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