Support for replacing treatment couch
By designing a support for the proton and heavy ion therapy device, the problems of mechanical arm failure and parameter adjustment difficulties of the treatment bed were solved, enabling rapid and precise adjustment of the bed board position, ensuring normal use of the therapy device and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-03
AI Technical Summary
Malfunctions in the robotic arm of the treatment bed or difficulties in parameter adjustment limit the use of the proton and heavy ion therapy device, affecting the execution of the treatment plan.
Design a support frame to replace the treatment bed, comprising a bed board, a support platform, a connecting plate, and an adjustment mechanism, which enables precise position adjustment of the bed board through coarse height adjustment, fine height adjustment, and horizontal adjustment components.
In the event of a malfunction in the treatment bed, the support can quickly and precisely adjust the position of the bed board to ensure smooth treatment, extend its service life, and improve convenience.
Smart Images
Figure CN224070985U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of proton and heavy ion therapy devices, and in particular to a support for use as an alternative to a treatment bed. Background Technology
[0002] Proton and heavy ion therapy is a cutting-edge radiotherapy system in the field of cancer treatment, based on a synchrotron accelerator. During treatment, the patient typically lies on a treatment bed, and a beam of light is emitted from a treatment head that rotates 180 or 360 degrees to precisely target the tumor site. Therefore, the parameters of the treatment bed cannot be adjusted arbitrarily.
[0003] In practice, the treatment bed consists of a robotic arm and the bed frame mounted on the robotic arm. However, the robotic arm is prone to malfunction or inaccurate movement during use. Furthermore, very few hospitals in my country utilize proton and heavy ion therapy equipment. This results in a large number of treatment personnel and the need for treatment plans to be carried out on schedule. Alternatively, when the parameters of the treatment equipment need to be adjusted and tested, the inability to use the treatment bed can lead to delays in patient treatment plans or prevent testing from being conducted. Utility Model Content
[0004] To address the issues of testers being unable to calibrate the treatment bed in a timely manner, long maintenance times for robotic arms, or delays in user access due to unforeseen circumstances, this application provides a support frame to replace the treatment bed.
[0005] The technical solution provided in this application for a support that can replace a treatment bed is as follows:
[0006] A support frame for use as an alternative to a treatment bed includes a bed board with support platforms at both ends. A connecting plate is positioned above the support platforms and between the support platforms and the bed board. A receiving plate is positioned between the bed board and the connecting plate. A limiting frame is fixed on the support platforms, and the connecting plate slides within the limiting frame. A coarse height adjustment component is positioned between the support platforms and the connecting plate, and a fine height adjustment component is positioned between the connecting plate and the receiving plate. A horizontal adjustment mechanism is provided at both ends of the receiving plate.
[0007] By adopting the above technical solution, when the treatment bed malfunctions, making it impossible for testers to calibrate and test the treatment bed in a timely manner, or when the robotic arm requires long maintenance or an emergency delays the user's use, the bed board can be pushed into the treatment room, positioning it under the treatment head. The position of the bed board can then be adjusted according to the treatment requirements. When the staff needs to adjust the height of the bed board, the coarse and fine height adjustment components work together to adjust the bed board to a precise position for subsequent treatment. After the height adjustment is completed, the horizontal adjustment mechanism adjusts the horizontal position of the bed board to ensure smooth treatment.
[0008] Optionally, the height coarse adjustment assembly includes two fixed housings fixed on the support platform, a worm gear rotatably connected inside the fixed housing, a worm rotatably connected outside the fixed housing, and two first lead screws fixed on the side of the connecting plate facing away from the receiving plate. The two fixed housings are respectively located at both ends of the support platform, and the two first lead screws are respectively located at both ends of the connecting plate. Both worm gears are meshed with the worm. The first lead screws and worm gears are coaxially arranged and threadedly connected.
[0009] By adopting the above technical solution, when the worm is rotated, the worm drives the two worm wheels meshing with it to rotate synchronously. Since the first lead screw is coaxial with the worm wheels and is threadedly connected, the rotation of the worm wheels will drive the first lead screw to move up and down along its own axis, thereby driving the connecting plate fixed on the first lead screw to slide within the limit frame, realizing the function of coarse adjustment of the bed board height.
[0010] Optionally, the height fine-tuning assembly includes two fine-tuning components, which are located at both ends of the connecting plate. Each fine-tuning component includes a fixed column fixed to the connecting plate, a second lead screw rotatably connected to the fixed column, a rotating disk coaxially fixed to the outside of the second lead screw, and a first sleeve fixed to the side of the receiving plate facing away from the bed board. The second lead screw and the first sleeve are threadedly connected.
[0011] By adopting the above technical solution, when the rotating disk is rotated, the rotating disk drives the second lead screw, which is coaxial with it, to rotate synchronously. Since the second lead screw is threadedly connected to the first sleeve fixed on the receiving plate, the rotational motion of the second lead screw is converted into the linear motion of the first sleeve under the action of the thread, thereby realizing the vertical fine-tuning function of the receiving plate fixed on the first sleeve, and realizing the function of fine-tuning the height of the bed board.
[0012] Optionally, the leveling mechanism includes two sets of leveling components, which are symmetrically arranged on both sides of the bed board. Each leveling component includes a first fixing block fixed to the support plate, a first push rod threaded to the first fixing block to move the bed board along the width direction of the support plate, a second fixing block fixed to the support plate, and a second push rod threaded to the second fixing block to move the bed board along the length direction of the support plate. The first push rod and the second push rod are arranged perpendicularly.
[0013] By adopting the above technical solution, when it is necessary to adjust the position of the bed board in the width direction of the support plate, only the first push rod needs to be rotated. Since the first push rod is threadedly connected to the first fixed block, rotating the first push rod allows it to move along its own axial direction, thereby pushing the bed board to move in the width direction of the support plate. When it is necessary to adjust the position of the bed board in the length direction of the support plate, only the second push rod needs to be rotated. Since the second push rod is threadedly connected to the second fixed block, rotating the second push rod allows it to move along its own axial direction, thereby driving the bed board to move in the length direction of the support plate. The first and second push rods work together to achieve adjustment of the bed board's horizontal position.
[0014] Optionally, the receiving plate is provided with several sets of adaptive structures at even intervals. The adaptive structure includes a receiving groove formed on the receiving plate, a spring fixed in the receiving groove, a second sleeve that slides vertically in the receiving groove, a connecting rod fixed on the second sleeve, and an abutment block that rotates at the end of the connecting rod away from the spring. One end of the spring is fixed to the inner wall of the receiving groove, and the other end of the spring is fixed to the side wall of the second sleeve. The abutment block is a triangular block with rounded edges.
[0015] By adopting the above technical solution, when the fine-tuning component at one end of the bed board is adjusted, the other end of the bed board remains unadjusted, resulting in a height difference between the two ends. This causes a gap between the bed board and the supporting plate on the same side, preventing the supporting plate from adequately supporting the bed board. When there is no height difference between the two ends of the bed board, the spring is compressed. When a height difference exists, the spring's reset action causes the second sleeve to slide within the receiving groove, thereby moving the connecting rod upwards. Since the abutment block and the connecting rod are rotatably connected, the abutment block rotates against the bed board, maintaining constant contact. This self-adaptive structure supports the gap between the bed board and the supporting plate, effectively extending the bed board's service life.
[0016] Optionally, a first reinforcing plate is fixed at the leg connection of the support platform, and a second reinforcing plate is fixed at the connection between the limiting frame and the support platform.
[0017] By adopting the above technical solution, the first reinforcing plate increases the stress-bearing area at the connection of the outriggers, preventing damage to the connection due to excessive stress. The second reinforcing plate increases the stress-bearing area at the connection between the limit frame and the support platform, making the connection between the limit frame and the support platform more robust.
[0018] In summary, this application includes at least one of the following beneficial technical effects:
[0019] 1. When testers are unable to calibrate the treatment bed in a timely manner, or when the robotic arm is under maintenance for a long time or an emergency delays the user, the fixed bracket can be pushed into the treatment room and the height and level of the bed board can be adjusted to replace the treatment bed for subsequent treatment, which is highly convenient to use.
[0020] 2. In actual use, the bed board is first quickly adjusted to the approximate height using the coarse height adjustment component, and then adjusted to the precise height using the fine height adjustment component. With the combined action of the coarse and fine height adjustment components, the bed board is adjusted to the required height. Finally, the horizontal adjustment mechanism is used to adjust the horizontal position of the bed board to meet the treatment requirements.
[0021] 3. When there is a height difference between the two ends of the bed board, the supporting plate cannot provide adequate support for the bed board. The spring drives the second sleeve to slide within the receiving groove, causing the connecting rod to move upward synchronously, and the abutment block to rotate against the bed board. The abutment block always maintains close contact with the bed board, enabling the abutment block to support the bed board and thus effectively extending the service life of the bed board. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is an overall schematic diagram of the fixed bracket provided in Embodiment 1 of this application;
[0024] Figure 2 This is a schematic diagram of the height coarse adjustment component provided in Embodiment 1 of this application;
[0025] Figure 3 This is a partial structural schematic diagram of the height coarse adjustment component provided in Embodiment 1 of this application, used to illustrate the worm gear and worm;
[0026] Figure 4 This is a schematic diagram of the structure of the fine-tuning component provided in Embodiment 1 of this application;
[0027] Figure 5 This is a schematic diagram of the structure of the horizontal adjustment component provided in Embodiment 1 of this application;
[0028] Figure 6 This is a schematic diagram of the adaptive structure provided in Embodiment 2 of this application, used to illustrate the positional relationship between the adaptive structure and the receiving plate;
[0029] Figure 7This is a vertically split view of the adaptive structure provided in Embodiment 2 of this application;
[0030] Figure 8 This is a schematic diagram of the support platform and limiting frame provided in Embodiment 2 of this application, used to show the first reinforcing plate and the second reinforcing plate.
[0031] Reference numerals: 1. Bed board; 2. Support platform; 3. Connecting plate; 4. Receiving plate; 5. Limiting frame; 6. Height coarse adjustment assembly; 601. Fixed shell; 602. Worm gear; 603. Worm; 604. First lead screw; 7. Height fine adjustment assembly; 71. Fine adjustment component; 7101. Fixed column; 7102. Second lead screw; 7103. Rotating disk; 7104. First sleeve; 8. Horizontal adjustment mechanism; 81. Horizontal adjustment assembly; 8101. First fixed block; 8102. First push rod; 8103. Second fixed block; 8104. Second push rod; 9. Adaptive structure; 901. Receiving groove; 902. Spring; 903. Second sleeve; 904. Connecting rod; 905. Abutment block; 10. First reinforcing plate; 11. Second reinforcing plate. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.
[0033] This application discloses a support for use as an alternative to a treatment bed.
[0034] Example 1:
[0035] Reference Figure 1 A support for replacing a treatment bed includes a bed board 1. The bed board 1 is made of carbon fiber, which is lightweight, extremely strong, and has good radiometric properties, so it will not interfere with X-ray imaging.
[0036] A support plate 4 is provided on both sides of the bed board 1. A connecting plate 3 is provided between the support plate 4 and the support platform 2. A limit frame 5 is fixed on the support platform 2, and the connecting plate 3 can slide within the limit frame 5. A support plate 4 is provided on both sides of the bed board 1.
[0037] Reference Figure 1 and Figure 2 A coarse height adjustment assembly 6 is provided between the support platform 2 and the connecting plate 3. When the height of the bed board 1 needs to be adjusted, the bed board 1 is quickly adjusted to the approximate height using the coarse height adjustment assembly 6. The coarse height adjustment assembly 6 includes two fixed housings 601, two worm gears 602, a worm 603, and two first lead screws 604. The two fixed housings 601 are symmetrically fixed at both ends of the support platform 2, and the two first lead screws 604 are also symmetrically fixed at both ends of the connecting plate 3.
[0038] Reference Figure 3 The worm gear 602 rotates inside the fixed housing 601, and the worm 603 is disposed on the outside of the fixed housing 601. In this embodiment, the length of the worm 603 is greater than the length between the two worm gears 602, and both worm gears 602 are meshed with both ends of the worm 603. By fitting the fixed housing 601 over the meshing connection between the worm gears 602 and the worm 603, workers can be prevented from accidentally touching the meshing connection between the worm gears 602 and the worm 603, thus preventing injury.
[0039] The first lead screw 604 and the worm gear 602 inside the fixed housing 601 are coaxially arranged, and the first lead screw 604 and the worm gear 602 are connected by a thread, so that the rotational motion of the worm gear 602 can be converted into the vertical movement of the first lead screw 604.
[0040] Reference Figure 3 When the worm 603 rotates in the forward direction, it drives the worm wheel 602 to rotate. Since the first lead screw 604 is coaxial with and threadedly connected to the worm wheel 602, the rotation of the worm wheel 602 drives the first lead screw 604 to move upward along its own axis. This, in turn, causes the first lead screw 604 to slide upward within the limit frame 5, thus quickly adjusting the bed board 1 upward. Similarly, when the worm 603 rotates in the reverse direction, it drives the worm wheel 602 to rotate. Since the first lead screw 604 is coaxial with and threadedly connected to the worm wheel 602, the rotation of the worm wheel 602 drives the first lead screw 604 to move downward along its own axis. This, in turn, causes the first lead screw 604 to slide downward within the limit frame 5, thus quickly adjusting the bed board 1 downward.
[0041] Reference Figure 1 and Figure 4 A height fine-tuning component 7 is provided between the connecting plate 3 and the receiving plate 4. To adjust the height of the bed board 1, the bed board 1 can be quickly adjusted to an approximate height using the coarse height adjustment component 6, and then adjusted to a precise height using the height fine-tuning component 7. The height fine-tuning component 7 includes two fine-tuning parts 71, which are symmetrically arranged at both ends of the connecting plate 3. Each fine-tuning part 71 includes a fixed column 7101, a second lead screw 7102, a rotating disk 7103, and a first sleeve 7104.
[0042] Reference Figure 4 The fixing post 7101 is fixed on the side of the connecting plate 3 facing the receiving plate 4, the first sleeve 7104 is fixed on the side of the receiving plate 4 facing the connecting plate 3, the second lead screw 7102 rotates coaxially on the fixing post 7101, the rotating disk 7103 is coaxially fixed on the outside of the second lead screw 7102, and the second lead screw 7102 and the first sleeve 7104 are threadedly connected.
[0043] Reference Figure 4When the rotating disk 7103 is rotated clockwise, since the rotating disk 7103 and the second lead screw 7102 are fixed, the rotating disk 7103 drives the second lead screw 7102 to rotate clockwise synchronously. Under the action of the thread, the clockwise rotation of the second lead screw 7102 is converted into the upward linear motion of the first sleeve 7104, thereby realizing the vertical upward fine-tuning function of the bed board 1, so that the bed board 1 reaches the precise height. Similarly, when the rotating disk 7103 is rotated counterclockwise, the rotating disk 7103 drives the second lead screw 7102 to rotate counterclockwise synchronously. Under the action of the thread, the counterclockwise rotation of the second lead screw 7102 is converted into the downward linear motion of the first sleeve 7104, thereby realizing the vertical downward fine-tuning function of the bed board 1, so that the bed board 1 reaches the precise height.
[0044] Reference Figure 1 and Figure 5 The receiving plate 4 is equipped with a horizontal adjustment mechanism 8. After the height of the bed board 1 is adjusted, it is sometimes necessary to adjust the horizontal position of the bed board 1 to ensure the smooth progress of treatment. The horizontal adjustment mechanism 8 includes two sets of horizontal adjustment components 81, which are symmetrically arranged on both sides of the bed board 1. Each horizontal adjustment component 81 includes a first fixing block 8101, a first push rod 8102, a second fixing block 8103, and a second push rod 8104. The first push rod 8102 and the second push rod 8104 are arranged perpendicularly.
[0045] The first fixing block 8101 is fixed to the side of the receiving plate 4 facing the bed board 1. The first push rod 8102 is threadedly connected to the first fixing block 8101, and rotating the first push rod 8102 allows the bed board 1 to slide along the width direction of the receiving plate 4. The second fixing block 8103 is fixed to the side of the receiving plate 4 facing the bed board 1. The second push rod 8104 is threadedly connected to the second fixing block 8103, and rotating the second push rod 8104 allows the bed board 1 to slide along the length direction of the receiving plate 4.
[0046] Reference Figure 5 To adjust the position of the bed board 1 in the width direction of the support plate 4, simply rotate the first push rod 8102. Since the first push rod 8102 is threadedly connected to the first fixing block 8101, rotating the first push rod 8102 causes it to move axially, thereby pushing the bed board 1 to move in the width direction. Similarly, to adjust the position of the bed board 1 in the length direction of the support plate 4, simply rotate the second push rod 8104. Since the second push rod 8104 is threadedly connected to the second fixing block 8103, rotating the second push rod 8104 causes it to move axially, thereby moving the bed board 1 in the length direction. With the combined action of the first push rod 8102 and the second push rod 8104, the horizontal position of the bed board 1 can be adjusted.
[0047] In Embodiment 1 of this application, the implementation principle of a support that replaces a treatment bed is as follows: When the treatment bed malfunctions, and testers are unable to calibrate and test the treatment bed in a timely manner, or when the robotic arm requires long maintenance or an emergency delays the user's use, the bed board 1 is pushed into the treatment room so that it is positioned under the treatment head. The position of the bed board 1 is adjusted according to the treatment requirements. When the staff needs to adjust the height of the bed board 1, the bed board 1 is finally adjusted to a precise position through the synergistic action of the coarse height adjustment component 6 and the fine height adjustment component 7, facilitating subsequent treatment. After the height adjustment is completed, the horizontal position of the bed board 1 can also be adjusted through the horizontal adjustment mechanism 8 to meet the treatment-related requirements, thereby ensuring the smooth progress of the treatment.
[0048] Example 2:
[0049] The difference between Example 2 and Example 1 is that: (Refer to...) Figure 6 and Figure 7 The receiving plate 4 is evenly spaced with several sets of adaptive structures 9. The adaptive structure 9 includes a receiving groove 901, a spring 902, a second sleeve 903, a connecting rod 904, and an abutment block 905. The abutment block 905 is a triangular block with rounded edges, so that the abutment block 905 can fit against the edge of the bed board 1 without damaging the bed board 1.
[0050] Reference Figure 7 A receiving groove 901 is formed on the receiving plate 4. A spring 902 is disposed between the receiving groove 901 and the second sleeve 903, with one end of the spring 902 fixed to the inner wall of the receiving groove 901 and the other end of the spring 902 fixed to the side wall of the second sleeve 903. The second sleeve 903 can slide on the receiving groove 901. A connecting rod 904 is fixed inside the second sleeve 903, and an abutment block 905 is rotatably connected to the connecting rod 904.
[0051] Reference Figure 7 In this embodiment, when the two ends of the bed board 1 are flush and there is no height difference, the spring 902 in the receiving groove 901 is in a compressed state, and the abutment block 905 is located in the receiving groove 901 and fits against the edge of the bed board 1. When there is a height difference between the two ends of the bed board 1, resulting in a gap between the bed board 1 on the same side and the supporting plate 4, the reset action of the spring 902 drives the second sleeve 903 to slide in the receiving groove 901, thereby driving the connecting rod 904 to move upward. Since the abutment block 905 and the connecting rod 904 are rotatably connected, the abutment block 905 will rotate while fitting against the bed board 1, always maintaining contact with the bed board 1. The adaptive structure 9 can support the gap between the bed board 1 and the supporting plate 4, effectively extending the service life of the bed board 1.
[0052] Reference Figure 8A first reinforcing plate 10 is fixed at the leg connection of the support platform 2, and a second reinforcing plate 11 is fixed at the connection between the limiting frame 5 and the support platform 2. The first reinforcing plate 10 increases the thickness and rigidity of the connection, enabling the support platform 2 to withstand greater external forces. Similarly, the second reinforcing plate 11 ensures that the connection between the limiting frame 5 and the support platform 2 will not be damaged due to excessive external forces.
[0053] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A support for use in place of a treatment couch, characterised in that: The utility model provides a height adjustable bed, including bed board (1), both ends of bed board (1) are provided with support platform (2) respectively, the top of support platform (2) is provided with connecting plate (3), connecting plate (3) is located between support platform (2) and bed board (1), be provided with the receiving plate (4) between bed board (1) and connecting plate (3), the limit frame (5) is fixed on support platform (2), connecting plate (3) slips in limit frame (5), height coarse adjustment assembly (6) is provided between support platform (2) and connecting plate (3), height fine adjustment assembly (7) is provided between connecting plate (3) and receiving plate (4), both ends of receiving plate (4) are provided with horizontal adjusting mechanism (8).
2. A support according to claim 1, characterised in that: The height coarse adjustment assembly (6) includes two fixed shells (601) fixed on the support platform (2), a worm wheel (602) rotatably connected in the fixed shell (601), a worm gear (603) rotatably connected outside the fixed shell (601), two first lead screws (604) fixed on the connecting plate (3) away from the receiving plate (4), the two fixed shells (601) are located at both ends of the support platform (2), the two first lead screws (604) are located at both ends of the connecting plate (3), the two worm wheels (602) are meshed with the worm gear (603), the first lead screw (604) is coaxially arranged with the worm wheel (602), and the first lead screw (604) is threadedly connected with the worm wheel (602).
3. A support according to claim 1, characterized in that: The height fine adjustment assembly (7) includes two fine adjustment components (71), the two fine adjustment components (71) are located at both ends of the connecting plate (3), the fine adjustment component (71) includes a fixed column (7101) fixed on the connecting plate (3), a second lead screw (7102) rotatably connected to the fixed column (7101), a rotating disc (7103) coaxially fixed outside the second lead screw (7102), and a first sleeve (7104) fixed on the receiving plate (4) away from the bed board (1), the second lead screw (7102) is threadedly connected with the first sleeve (7104).
4. The support according to claim 1, characterized in that: The horizontal adjusting mechanism (8) includes two groups of horizontal adjusting assemblies (81), and the two groups of horizontal adjusting assemblies (81) are symmetrically arranged on both sides of the bed board (1). The horizontal adjusting assembly (81) includes a first fixed block (8101) fixed on the receiving plate (4), a first top rod (8102) threadedly connected to the first fixed block (8101) to move the bed board (1) along the width direction of the receiving plate (4), a second fixed block (8103) fixed on the receiving plate (4), and a second top rod (8104) threadedly connected to the second fixed block (8103) to move the bed board (1) along the length direction of the receiving plate (4), and the first top rod (8102) and the second top rod (8104) are perpendicular.
5. The support according to claim 1, characterized in that: The receiving plate (4) is uniformly provided with a plurality of adaptive structures (9), the adaptive structure (9) comprises a containing groove (901) opened on the receiving plate (4), a spring (902) fixed in the containing groove (901), a second sleeve (903) vertically sliding in the containing groove (901), a connecting rod (904) fixed on the second sleeve (903), and an abutting block (905) rotating on one end of the connecting rod (904) away from the spring (902), one end of the spring (902) is fixed on the inner wall of the containing groove (901), the other end of the spring (902) is fixed on the side wall of the second sleeve (903), the abutting block (905) is a triangular block, and the edges of the abutting block (905) are provided in a circular arc shape.
6. The support according to claim 1, characterized in that: The supporting legs of the supporting table (2) are provided with first reinforcing plates (10), and the connecting part of the limiting frame (5) and the supporting table (2) is provided with a second reinforcing plate (11).