Konjac powder dewatering device for processing konjac fine powder

Abstract

The application discloses a kind of processing konjak fine powder with konjak powder dewatering device, including the support frame of U type arrangement, the left and right sides of support frame upper end are all equipped with first drive motor, the front end of the power output shaft of two first drive motor is cooperatively provided with connecting frame, the front end of each first drive motor power output shaft is equipped with rotating assembly, the inner wall of connecting frame is located away from its bottom position and is provided with dehydration assembly, the inner wall of dehydration assembly is detachably connected with mesh screen bag, the lower end of the outer wall of dehydration assembly is rotatably connected with a plurality of first rollers, the lower end of extrusion assembly is installed in the lower end of connecting frame, the edge of extrusion assembly is provided with water baffle, the opening end of fixed cylinder is detachably connected with fixed cover, the side of support frame outer wall is provided with control panel.The application can complete the dehydration of konjak powder without being limited by the weight of konjak powder when konjak powder is dehydrated, and after dehydration is completed, there is no problem of difficult konjak powder removal.

Description

Technical Field

[0001] This invention relates to the field of konjac processing technology, and in particular to a konjac flour dehydration device for processing konjac flour. Background Technology

[0002] Traditional konjac flour processing methods involve dry processing, which involves washing, peeling, slicing, sun-drying or oven-drying fresh konjac, then pulverizing it with a grinder and separating the powder using an air separator. This method yields low-purity flour with a low yield, resulting in high production costs. Wet processing methods involve adding a large amount of edible alcohol as a processing medium to the washed and peeled fresh konjac to grind it into a slurry, then separating and dehydrating it before drying. However, this method consumes a large amount of edible alcohol, leading to high production costs.

[0003] According to the invention patent CN116869184A, a konjac product extrusion and dehydration device includes a support platform with support legs fixedly connected to the bottom. The platform is equipped with an extrusion and dehydration device, a rotational dehydration device, and an alarm device. The extrusion and dehydration device includes a dehydration barrel with a drainage trough on its outer side. An elastic support rod is fixedly connected to the bottom of the barrel, and an electric rotating rod is fixedly connected to the bottom of the rod. The electric rotating rod rotates and is electrically connected to a motor. This invention, through the extrusion and rotational dehydration devices, can effectively dehydrate the konjac in the barrel. The extrusion and dehydration device effectively squeezes the konjac, removing most of the water. Simultaneously, the rotational dehydration device works in conjunction with the extrusion and dehydration device to further remove water from the konjac, enhancing the dehydration effect and improving the overall dehydration efficiency of the device. It is highly practical.

[0004] While the above-mentioned technical solution can complete the dehydration of konjac flour, it relies on an elastic support rod to control the lifting and lowering of the dehydration drum. This method requires that the weight of the konjac flour before dehydration must be greater than the elastic limit of the support rod, and the weight of the konjac flour after dehydration must be less than the elastic limit of the support rod for the solution to work smoothly. This limits its applicability. Furthermore, this technical solution presents the problem of difficulty in removing the konjac flour from the dehydration drum after dehydration. Summary of the Invention

[0005] The purpose of this invention is to provide a konjac flour dehydration device for processing konjac flour. This device can complete the dehydration of konjac flour without being limited by its weight, and it also avoids the problem of difficulty in removing the konjac flour after dehydration.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] A konjac flour dehydration device for processing konjac flour includes a U-shaped support frame. First drive motors are installed on both the left and right sides of the upper end of the support frame. A U-shaped connecting frame is fitted between the front ends of the power output shafts of the two first drive motors. A rotating component is fitted between the front end of each first drive motor power output shaft and the outer wall of the corresponding side of the connecting frame. A dehydration component is located on the inner wall of the connecting frame away from its bottom. The dehydration component includes a fixed cylinder with openings at both ends and extending beyond its upper end, a fixed ring located at the lower end of the inner wall of the fixed cylinder, a dehydration cylinder rotatably connected to the upper end of the fixed ring and open at both ends, and a base plate that slides along the inner wall of the dehydration cylinder and drives its rotation. A mesh bag is detachably connected to the inner wall of the dehydration cylinder. A retaining ring is located at the lower end of the outer wall of the dehydration cylinder and extends into its inner wall. A plurality of first rollers, evenly spaced and in contact with the fixed ring, are rotatably connected to the lower end of the outer wall of the retaining ring.

[0008] The upper and lower ends of the inner wall of the fixed cylinder are provided with limiting components that contact the outer wall of the dehydration cylinder. The lower end of the connecting frame is equipped with a squeezing component. The squeezing component includes a first electric push rod, a support plate disposed on the upper end of the first electric push rod, and a second drive motor mounted on the upper end of the support plate. The power output shaft of the second drive motor is fixedly connected to the outer wall of the base plate. The lower edge of the support plate is provided with a water baffle for covering the squeezing component. The open end of the fixed cylinder is detachably connected with a matching fixed cover. A control panel is provided on one side of the outer wall of the support frame. The first drive motor and the squeezing component are electrically connected to the control panel.

[0009] By adopting the above technical solution, when using the device, first power it on, operate the control panel to retract the first electric push rod on the extrusion assembly to its lowest position, so that the bottom plate is at the lowest position of the dehydration cylinder. Then remove the fixed cover on the fixed cylinder, and pour the konjac powder to be dehydrated into the mesh bag inside the dehydration cylinder of the dehydration assembly. Then close the fixed cover and start the first drive motor. The two first drive motors rotate the connecting frame to a horizontal position through the rotating assembly. At this time, the konjac powder in the dehydration cylinder is in a dispersed state. Then the second drive motor starts, and the second drive motor drives the dehydration cylinder to rotate on the fixed ring through the bottom plate. Through centrifugal force, the konjac powder is dehydrated. The powder undergoes initial dehydration, while the limiting component maintains the stability of the dehydration cylinder's rotation. The dehydrated water flows out along the inner wall of the fixed cylinder. After the initial dehydration is complete, the connecting frame is kept horizontal or returned to its initial state. Then, the first electric push rod extends and drives the second drive motor on the base plate to slide the base plate upward along the inner wall of the dehydration cylinder, squeezing the konjac powder between the base plate and the fixed cover to achieve further dehydration. After dehydration is complete, the fixed cover is removed, and the upper end of the fixed cylinder is tilted downward. Then, the first electric push rod continues to extend to push the mesh bag out of the dehydration cylinder, thus completing the dehydration and removal of the konjac powder.

[0010] A further configuration of the present invention is as follows: the rotating assembly includes a hollow fixed shell, a plurality of rollers rotatably connected to the inner wall of the fixed shell at equal intervals, a rotating shaft rotatably connected to the fixed shell and extending out of its outer wall at both ends, and a rotating roller located inside the fixed shell and disposed on the outer wall of the rotating shaft.

[0011] By adopting the above technical solution, not only can the force on the first drive motor during dehydration be reduced, but the smoothness of the first drive motor controlling the rotation of the connecting frame can also be improved.

[0012] A further provision of the present invention is that the limiting component includes a limiting ring and a plurality of limiting wheels rotatably connected to the inner wall of the limiting ring and distributed at equal intervals.

[0013] A further feature of the present invention is that: the upper end of the inner wall of the dehydration cylinder is provided with a plurality of equally spaced sliding grooves along its length direction, and the outer wall of the bottom plate is provided with a plurality of limiting protrusions that correspond one-to-one with the sliding grooves and are slidably connected thereto.

[0014] A further feature of the present invention is that the dehydration cylinder is detachably connected to the fixing ring, a positioning ring is provided on the outer wall of the dehydration cylinder near its upper end, a fixing bracket is detachably connected to the open end of the fixing cylinder, a through hole is provided at the upper end of the outer wall of the fixing bracket, and the fixing cover is disposed in the through hole and detachably connected to it.

[0015] By adopting the above technical solution, the dehydration cylinder can be cleaned in a timely manner after use, which not only facilitates the cleaning operation of the staff, but also avoids the konjac powder clogging the dehydration cylinder and affecting the dehydration efficiency.

[0016] A further feature of the present invention is that the lower end of the outer wall of the fixed card holder is provided with a plurality of second rollers that contact the upper end of the outer wall of the positioning ring.

[0017] By adopting the above technical solution, when dehydrating in the vertical or horizontal direction, the second roller can not only restrict the dehydration cylinder, but also not affect the normal rotation of the dehydration cylinder, thereby improving the smoothness of its rotation.

[0018] A further provision of the present invention is that: the upper end of the outer wall of the fixed cylinder is provided with a first external thread, the inner wall of the fixed card seat is provided with a first internal thread that is threadedly connected to the first external thread, the inner wall of the through hole is provided with a second internal thread, and the outer wall of the fixed cover is provided with a second external thread that is threadedly connected to the second internal thread.

[0019] A further feature of the present invention is that a second electric push rod, which is inclined, is rotatably connected between the left and right sides of the outer wall of the connecting frame and the bottom of the support frame.

[0020] By adopting the above technical solution, the first drive motor can be assisted when the connecting frame is rotated. This not only reduces the force on the first drive motor, but also provides some support for the connecting frame, ensuring its stability during operation.

[0021] A further provision of the present invention is that a plurality of positioning rods, which are equally spaced and retractable, are provided between the bottom of the support plate and the connecting frame.

[0022] By adopting the above technical solution, the torque generated by the second drive motor on the first electric push rod can be reduced, thereby improving the service life of the first electric push rod.

[0023] In summary, the present invention has the following beneficial effects:

[0024] Firstly, this invention can complete the dehydration of konjac powder without being limited by the weight of the konjac powder, and there is no problem of difficulty in removing the konjac powder after dehydration.

[0025] Secondly, this invention can not only dehydrate the dehydration cylinder in a vertical direction, but also in a horizontal state, avoiding the problems of low efficiency and incomplete dehydration of the bottom-sinking dehydration method, and also facilitating the cleaning work after use.

[0026] Thirdly, the extrusion assembly of the present invention can not only extrude and dehydrate the konjac powder again after the initial dehydration, but also push the konjac powder out of the dehydration cylinder after dehydration, making it convenient for workers to collect the dehydrated konjac powder and reducing the burden on the workers. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is mainly used to show the positional connection relationship of each component;

[0029] Figure 3 This is a schematic diagram of the dehydration component of the present invention;

[0030] Figure 4 This is a schematic diagram of the extrusion assembly of the present invention;

[0031] Figure 5 This is a schematic diagram of the rotating assembly of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the limiting component of the present invention;

[0033] Figure 7 This is a diagram showing the usage state of the present invention.

[0034] In the diagram: 1. Support frame; 11. First drive motor; 12. Connecting frame; 13. Rotating assembly; 14. Fixed shell; 15. Roller; 16. Rotating shaft; 17. Rotating roller; 18. Dewatering assembly; 19. Fixed cylinder; 2. Fixed ring; 21. Dewatering cylinder; 22. Base plate; 23. Mesh bag; 24. Snap ring; 25. First roller; 26. Slide groove; 27. Limiting protrusion; 28. Limiting assembly; 29. ​​Limiting ring; 3. Limiting wheel; 31. Extrusion assembly; 32. First electric push rod; 33. Support plate; 34. Second drive motor; 35. Positioning rod; 36. Water baffle; 37. Second electric push rod; 38. Fixed bracket; 39. First external thread; 4. First internal thread; 41. Through hole; 42. Second internal thread; 43. Fixed cover; 44. Second external thread; 45. Positioning ring; 46. Second roller; 47. Control panel. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Example, refer to Figure 1-7 A konjac flour dehydration device for processing konjac flour includes a U-shaped support frame 1. A first drive motor 11 is mounted on each of the left and right sides of the upper end of the support frame 1. A U-shaped connecting frame 12 is fitted between the front ends of the power output shafts of the two first drive motors 11. A rotating assembly 13 is fitted between the front end of the power output shaft of each first drive motor 11 and the outer wall of the corresponding side of the connecting frame 12. The rotating assembly 13 includes a hollow fixed shell 14 and several components rotatably connected to the fixed shell 14 at equal intervals. The wall roller 15, the rotating shaft 16 which is rotatably connected to the fixed shell 14 and extends out of its outer wall at both ends, the rotating roller 17 which is inside the fixed shell 14 and set on the outer wall of the rotating shaft 16, and the dewatering assembly 18 which is set on the inner wall of the connecting frame 12 away from its bottom. The dewatering assembly 18 includes a fixed cylinder 19 which is open at both ends and extends out of its upper end, a fixed ring 2 set at the lower end of the inner wall of the fixed cylinder 19, a dewatering cylinder 21 which is rotatably connected to the upper end of the fixed ring 2 and is open at both ends, and a base plate 22 which slides along the inner wall of the dewatering cylinder 21 and is used to drive its rotation.

[0040] The upper end of the inner wall of the dehydration cylinder 21 is provided with several equally spaced grooves 26 extending downwards along its length. The outer wall of the bottom plate 22 is provided with several limiting protrusions 27 that correspond one-to-one with the grooves 26 and are slidably connected to them. A mesh bag 23 is detachably connected to the inner wall of the dehydration cylinder 21. A retaining ring 24 is provided at the lower end of the outer wall of the dehydration cylinder 21 and extends into its inner wall. Several first rollers 25, which are equally spaced and contact the fixing ring 2, are rotatably connected to the lower end of the outer wall of the retaining ring 24. The upper and lower ends of the inner wall of the fixing cylinder 19 are provided with a retaining ring that contacts the outer wall of the dehydration cylinder 21. The contact limiting component 28 includes a limiting ring 29 and several limiting wheels 3 rotatably connected to the inner wall of the limiting ring 29 and evenly distributed. The lower end of the connecting frame 12 is equipped with a pressing component 31, which includes a first electric push rod 32, a support plate 33 disposed on the upper end of the first electric push rod 32, and a second drive motor 34 mounted on the upper end of the support plate 33. The power output shaft of the second drive motor 34 is fixedly connected to the outer wall of the base plate 22. Multiple positioning rods 35 evenly distributed and retractable are provided between the support plate 33 and the bottom of the connecting frame 12.

[0041] A water-blocking cover 36 for covering the extrusion assembly 31 is provided at the lower edge of the support plate 33. A second electric push rod 37, which is inclined, is rotatably connected to the left and right sides of the outer wall of the connecting frame 12 and the bottom of the support frame 1. The dewatering cylinder 21 is detachably connected to the fixing ring 2. A positioning ring 45 is provided on the outer wall of the dewatering cylinder 21 near its upper end. A fixing seat 38 that mates with the opening end of the fixing cylinder 19 is detachably connected. A first external thread 39 is provided on the upper end of the outer wall of the fixing cylinder 19. A first internal thread 4 that is threadedly connected to the first external thread 39 is provided on the inner wall of the fixing seat 38. The lower end of the outer wall of the fixed bracket 38 is provided with several second rollers 46 that contact the upper end of the outer wall of the positioning ring 45. A through hole 41 is provided downward through the upper end of the outer wall of the fixed bracket 38. A second internal thread 42 is provided on the inner wall of the through hole 41. A fixed cover 43 that mates with the through hole 41 is detachably connected to the through hole 41. A second external thread 44 that is threadedly connected to the second internal thread 42 is provided on the outer wall of the fixed cover 43. A control panel 47 is provided on one side of the outer wall of the support frame 1. The first drive motor 11, the first electric push rod 32, the second drive motor 34 and the second electric push rod 37 are all electrically connected to the control panel 47.

[0042] Instructions for use: First, power on the device. Operate the control panel 47 on the support frame 1 to retract the first electric push rod 32 on the extrusion assembly 31 to its lowest position, placing the bottom plate 22 at the lowest position of the dehydration cylinder 21. The positioning rod 35 can then extend and retract by the same length. Next, remove the fixing cover 43 on the through hole 41. Then, pour the konjac powder to be dehydrated into the mesh bag 23 inside the dehydration cylinder 21 of the dehydration assembly 18. Then, replace the fixing cover 43 and secure it by the engagement of the second internal thread 42 and the second external thread 44. This will activate the first drive motor 11 and the second electric push rod 37, causing the two first drive motors 11 to rotate the rotating assembly 13. The rotating shaft 16 drives the rotating roller 17 to rotate on the roller 15 inside the fixed shell 14, thereby rotating the connecting frame 12 to a horizontal position. At the same time, the second electric push rod 37 extends to assist the first drive motor 11 in driving the connecting frame 12 to rotate. At this time, the konjac powder in the dehydration cylinder 21 is in a dispersed state and fills the lower half of the dehydration cylinder 21. Then, the second drive motor 34 on the support plate 33 works. The second drive motor 34 drives the dehydration cylinder to rotate on the fixed ring 2 through the bottom plate 22. Since the limiting protrusion 27 on the bottom plate 22 is engaged with the sliding groove 26, the dehydration cylinder 21 can be rotated by rotating the bottom plate 22. Then, the konjac powder is initially dehydrated by centrifugal force.

[0043] The contact between the positioning ring 45 and the second roller 46 ensures that the dehydration cylinder 21 will not move back and forth. During dehydration, the limiting component 28 can maintain the stability of the rotation of the dehydration cylinder 21. The limiting wheel 3 on the limiting ring 29 will contact the outer wall of the dehydration cylinder 21 in real time to prevent it from shaking. The positioning rod 35 can reduce the force on the first electric push rod 32 when the second drive motor 34 is working. Finally, the dehydrated water will flow out along the inner wall of the fixed cylinder 19. The water baffle 36 can prevent water from falling on the second drive motor 34. After the initial dehydration is completed, the connecting frame 12 is returned to the initial state for dehydration again. At this time, the first roller 25 on the retaining ring 24 and the second roller 46 on the fixed bracket 38 can keep the dehydration cylinder 21 rotating smoothly and keep it stable.

[0044] Then, the first electric push rod 32 extends and drives the base plate 22 to slide upward along the inner wall of the dehydration cylinder 21 via the second drive motor 34 on the base plate 22, so as to squeeze the konjac powder between the base plate 22 and the fixed cover 43 to achieve dehydration again. After dehydration, the fixed cover 43 is removed and the upper end of the fixed cylinder 19 is set in a downward tilted state. Then, the first electric push rod 32 continues to extend to push the mesh bag 23 out of the dehydration cylinder 21, thus completing the dehydration and removal of the konjac powder. When cleaning is required after use, rotate the fixed bracket 38 to move the first internal thread 4 away from the first external thread 39 to remove the fixed cylinder 19. Then, set the connecting bracket 12 in a downward tilted state, extend the first electric push rod 32 and pull the dehydration cylinder 21 out of the front opening of the fixed cylinder 19. Since the base plate 22 will contact the retaining ring 24, the dehydration cylinder 21 will not completely detach from the fixed cylinder 19. Then, cleaning can be performed.

[0045] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A konjac flour dehydration device for processing konjac flour, comprising a U-shaped support frame (1), characterized in that: First drive motors (11) are installed on both the left and right sides of the upper end of the support frame (1). A U-shaped connecting frame (12) is provided between the front ends of the power output shafts of the two first drive motors (11). A rotating component (13) is installed between the front end of the power output shaft of each first drive motor (11) and the outer wall of the corresponding side of the connecting frame (12). A dehydration component (18) is provided on the inner wall of the connecting frame (12) away from its bottom. The dehydration component (18) includes a fixed cylinder (19) with openings at both ends and extending out of its upper end. A fixed ring (2) is provided at the lower end of the inner wall of the fixed cylinder (19), a dehydration cylinder (21) is rotatably connected to the upper end of the fixed ring (2) and open at both ends, and a base plate (22) slides along the inner wall of the dehydration cylinder (21) and is used to drive its rotation. A mesh bag (23) is detachably connected to the inner wall of the dehydration cylinder (21). A retaining ring (24) is provided at the lower end of the outer wall of the dehydration cylinder (21) and extends to its inner wall. A number of first rollers (25) are rotatably connected to the lower end of the outer wall of the retaining ring (24) and are evenly distributed and all in contact with the fixed ring (2). The upper and lower ends of the inner wall of the fixed cylinder (19) are provided with limiting components (28) that contact the outer wall of the dehydration cylinder (21). The lower end of the connecting frame (12) is equipped with a squeezing component (31). The squeezing component (31) includes a first electric push rod (32), a support plate (33) provided on the upper end of the first electric push rod (32), and a second drive motor (34) installed on the upper end of the support plate (33). The power output shaft of the second drive motor (34) is fixedly connected to the outer wall of the base plate (22). The lower edge of the support plate (33) is provided with a water baffle (36) for covering the squeezing component (31). The opening end of the fixed cylinder (19) is detachably connected with a fixed cover (43). A control panel (47) is provided on one side of the outer wall of the support frame (1). The first drive motor (11) and the squeezing component (31) are electrically connected to the control panel (47).

2. The konjac flour dehydration device for processing konjac flour according to claim 1, characterized in that: The rotating assembly (13) includes a hollow fixed shell (14), a plurality of rollers (15) rotatably connected to the inner wall of the fixed shell (14) at equal intervals, a rotating shaft (16) rotatably connected to the fixed shell (14) and extending out of its outer wall at both ends, and a rotating roller (17) inside the fixed shell (14) and disposed on the outer wall of the rotating shaft (16).

3. The konjac flour dehydration device for processing konjac flour according to claim 1, characterized in that: The limiting component (28) includes a limiting ring (29) and a plurality of limiting wheels (3) rotatably connected to the inner wall of the limiting ring (29) and distributed at equal intervals.

4. The konjac flour dehydration device for processing konjac flour according to claim 1, characterized in that: The upper end of the inner wall of the dehydration cylinder (21) is provided with several equally spaced sliding grooves (26) along its length direction. The outer wall of the bottom plate (22) is provided with several limiting protrusions (27) that correspond one-to-one with the sliding grooves (26) and are slidably connected to them.

5. The konjac flour dehydration device for processing konjac flour according to claim 1, characterized in that: The dehydration cylinder (21) is detachably connected to the fixing ring (2). A positioning ring (45) is provided on the outer wall of the dehydration cylinder (21) near its upper end. The opening end of the fixing cylinder (19) is detachably connected to a fixing seat (38) that cooperates with it. A through hole (41) is provided at the upper end of the outer wall of the fixing seat (38). The fixing cover (43) is located in the through hole (41) and is detachably connected to it.

6. The konjac flour dehydration device for processing konjac flour according to claim 5, characterized in that: The lower end of the outer wall of the fixed card holder (38) is provided with several second rollers (46) that contact the upper end of the outer wall of the positioning ring (45).

7. The konjac flour dehydration device for processing konjac flour according to claim 5, characterized in that: The upper end of the outer wall of the fixed cylinder (19) is provided with a first external thread (39), the inner wall of the fixed bracket (38) is provided with a first internal thread (4) that is threadedly connected to the first external thread (39), the inner wall of the through hole (41) is provided with a second internal thread (42), and the outer wall of the fixed cover (43) is provided with a second external thread (44) that is threadedly connected to the second internal thread (42).

8. The konjac flour dehydration device for processing konjac flour according to claim 1, characterized in that: The left and right sides of the outer wall of the connecting frame (12) are rotatably connected to the bottom of the support frame (1) with a second electric push rod (37) that is set at an inclination.

9. The konjac flour dehydration device for processing konjac flour according to claim 1, characterized in that: Multiple positioning rods (35) that are equally spaced and retractable are provided between the bottom of the support plate (33) and the connecting frame (12).

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