Hollow glass air tightness detection device

Abstract

The invention discloses an air tightness detection device for hollow glass, which belongs to the technical field of glass detection and comprises a detection box, a feeding conveying belt and a discharging conveying belt arranged at the feeding end and the discharging end of the detection box, a soaking box arranged on one side of the detection box and a tray device used for loading the hollow glass. A plurality of conveying rollers are arranged at the bottom of the detection box, a transfer device used for transferring the tray device is arranged between the detection box and the soaking box, a three-axis movement module and a flushing assembly are arranged at the top of the detection box, and the three-axis movement module is provided with a detection assembly; after being soaked in the soaking box filled with colored liquid, the hollow glass is clamped by the detection assembly and moves up and down along with the three-axis movement module, and the air tightness of the hollow glass is detected through color comparison in the movement process. The air tightness of the hollow glass is detected through color comparison, and compared with an existing detection mode, the detection efficiency is higher, the detection result is more accurate, and misjudgment caused by manual observation can be eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of glass detection, and particularly relates to an airtightness detection device for insulating glass. Background Art

[0002] Insulating glass is a glass product in which two or more pieces of glass are evenly separated by effective supports and peripherally bonded and sealed to form a dry gas space between the glass layers, and has functions such as heat insulation, heat preservation, and sound insulation. The airtightness of insulating glass refers to the ability of insulating glass to resist the penetration of external gases in a sealed state, which directly affects the heat insulation and heat preservation performance of insulating glass. Therefore, during the production process of insulating glass, it is necessary to detect the airtightness of insulating glass.

[0003] Chinese Patent with publication number CN213658175U discloses an airtightness detector for insulating glass. The device includes an airtightness detection box filled with clean water, and lifting cylinders are symmetrically arranged on both sides of the airtightness detection box. The device judges whether the airtightness of the insulating glass is good by immersing the insulating glass in water and then observing whether there is water in the hollow cavity of the insulating glass. Although the above-mentioned prior art can realize the detection of the airtightness of glass, it can only detect one piece of glass at a time during application, cannot perform batch detection, has low detection efficiency, and at the same time, the method of manual observation is very cumbersome, and water itself is transparent and colorless, so manual observation is prone to misjudgment. Summary of the Invention

[0004] The purpose of the present invention is to provide an airtightness detection device for insulating glass to solve the problems of low detection efficiency and easy misjudgment in the existing airtightness detection of insulating glass.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] An airtightness detection device for insulating glass includes: a detection box, a feeding conveyor belt and a discharging conveyor belt arranged at the feeding end and the discharging end of the detection box, a soaking box arranged on one side of the detection box, and a tray device for loading insulating glass;

[0007] A plurality of conveying rollers are provided at the bottom of the detection box, a transfer device for transferring the tray device is provided between the detection box and the soaking box, a three-axis motion module and a flushing component are provided at the top of the detection box, and a detection component is provided on the three-axis motion module;

[0008] After the insulating glass is soaked in the soaking box filled with colored liquid, it is clamped by the detection component and moves up and down with the three-axis motion module, and the airtightness of the insulating glass is detected by color comparison during the movement.

[0009] Further, the above-mentioned detection component includes a mounting plate vertically arranged and connected to the three-axis motion module, a clamping component arranged on one side of the mounting plate, and a background plate and a color sensor arranged on the three-axis motion module and located on the corresponding two sides of the mounting plate respectively;

[0010] After the insulating glass is clamped by the clamping component, it moves up and down with the mounting plate under the drive of the three-axis motion module. The color sensor continuously acquires the color of the insulating glass and compares it with the reference color. When the acquired color is within the error range of the reference color, the airtightness is low; when the acquired color is outside the error range of the reference color, the airtightness is high.

[0011] Further, the above-mentioned clamping component includes a first clamping plate and a second clamping plate arranged oppositely; the first clamping plate and the second clamping plate are respectively connected with a first telescopic driver, and the first telescopic driver is arranged on the mounting plate; anti-slip layers are arranged on the opposite sides of the first clamping plate and the second clamping plate.

[0012] Further, wiper components are respectively arranged on both sides of the above-mentioned mounting plate; the wiper component includes a second telescopic driver vertically arranged on the mounting plate and a wiper blade arranged at the bottom telescopic end of the second telescopic driver; both ends of the wiper blade respectively extend to the first clamping plate and the second clamping plate.

[0013] Further, the above-mentioned three-axis motion module includes two groups of X-axis motion modules arranged oppositely on the top of the detection box, a Y-axis motion module arranged on the X-axis motion module, and a Z-axis motion module arranged on the Y-axis motion module; the mounting plate is connected with the moving part of the Z-axis motion module, and the background plate and the color sensor are connected with the fixed part of the Z-axis motion module.

[0014] Further, the above-mentioned transfer device includes a connecting plate arranged between the detection box and the soaking box, a robotic arm arranged on the connecting plate, and a gripper arranged on the robotic arm;

[0015] The tray device includes a base, a plurality of limiting components arranged on the base, and a suspension rod arranged at the middle position of the top of the base; a lifting hole matching the gripper is arranged at the top of the suspension rod.

[0016] Further, the above-mentioned limiting components include a plurality of limiting rods, and all the limiting rods surround to form a limiting cavity for limiting the insulating glass; the height of the lifting hole is higher than the center of gravity height of the insulating glass.

[0017] Further, sealing plates are respectively connected to both ends of the above-mentioned detection box through flipping mechanisms.

[0018] Further, the above-mentioned flushing assembly includes a spray pipe horizontally arranged on the top of the detection box, several spray heads communicated with the spray pipe, and a translation mechanism arranged on the detection box and connected to the spray pipe, and the translation mechanism drives the spray pipe to move longitudinally along the detection box.

[0019] Further, all the above-mentioned conveying rollers are arranged in parallel and are respectively rotatably matched with both sides of the detection box at both ends; one ends of all the conveying rollers are connected through a linkage structure; the linkage structure includes a rotating shaft rotatably arranged on the detection box, several first bevel gears arranged on the rotating shaft, and a driving member connected to the rotating shaft, and a second bevel gear meshing with the corresponding first bevel gear is arranged at one end of the conveying roller.

[0020] The present invention has the following beneficial effects:

[0021] (1) The present invention loads multiple pieces of insulating glass through the tray device. First, the insulating glass is placed in an immersion tank filled with a colored liquid for immersion, and then flushed in the detection box. When the airtightness is not good, the colored solution will enter the interior of the insulating glass, and then it is detected by the detection component. During the detection, the airtightness of the insulating glass is detected by color comparison. Compared with the existing detection methods, the detection efficiency is higher, the detection result is more accurate, and the misjudgment caused by manual observation can be eliminated.

[0022] (2) When the insulating glass airtightness detection device of the present invention is detecting, the insulating glass continuously moves upward. During the movement, the color sensor continuously acquires the color data of the insulating glass, and the airtightness of the insulating glass is detected by comparing the acquired color with the reference color. At the same time, a background board is arranged in the color capture direction of the color sensor, which is beneficial to reducing the interference of external colors and ensuring the accuracy of the detection result.

[0023] (3) The tray device of the present invention can load multiple pieces of insulating glass at one time, reducing the number of transfers. Moreover, the height of the lifting hole of the tray device is higher than the center of gravity height of the insulating glass, ensuring the stability of the insulating glass during the transfer process. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the insulating glass airtightness detection device of the present invention;

[0025] Figure 2 is a schematic structural diagram of the tray device of the present invention;

[0026] Figure 3 is a schematic structural diagram of the transfer device of the present invention;

[0027] Figure 4 is a schematic external structural diagram of the detection box of the present invention;

[0028] Figure 5Schematic structural diagram of the detection box of the present invention after removing the sealing plate;

[0029] Figure 6 Schematic structural diagram of the three-axis motion module and the detection component of the present invention;

[0030] Figure 7 Schematic installation structure diagram of the clamping component and the wiper component of the present invention.

[0031] In the figure: 10 - detection box; 11 - conveying roller; 12 - flipping mechanism; 13 - sealing plate; 14 - linkage structure; 15 - second bevel gear; 20 - feeding conveyor belt; 30 - discharging conveyor belt; 40 - soaking tank; 50 - tray device; 51 - base; 52 - limiting component; 53 - suspension rod; 54 - lifting hole; 55 - limiting rod; 60 - transfer device; 61 - connecting plate; 62 - robotic arm; 63 - jaw; 70 - three-axis motion module; 71 - X-axis motion module; 72 - Y-axis motion module; 73 - Z-axis motion module; 80 - detection component; 81 - mounting plate; 82 - clamping component; 83 - background plate; 84 - color sensor; 85 - wiper component; 90 - flushing component; 91 - spray pipe; 92 - nozzle; 93 - translation mechanism; 141 - rotating shaft; 142 - first bevel gear; 143 - driving part; 821 - first clamping plate; 822 - second clamping plate; 823 - first telescopic driver; 851 - second telescopic driver; 852 - wiper blade. Specific embodiments

[0032] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0033] Please refer to Figures 1 to 7 , this embodiment provides a hollow glass airtightness detection device for detecting the airtightness of hollow glass by color comparison. It includes: a detection box 10, a feeding conveyor belt 20 and a discharging conveyor belt 30 arranged at the feeding end and the discharging end of the detection box 10, a soaking tank 40 arranged on one side of the detection box 10, and a tray device 50 for loading hollow glass. A plurality of conveying rollers 11 are provided at the bottom of the detection box 10, and the conveying rollers 11 are arranged in sequence from the feeding end to the discharging end. A transfer device 60 is provided between the detection box 10 and the soaking tank 40. A three-axis motion module 70 and a flushing component 90 are provided at the top of the detection box 10, and a detection component 80 is provided on the three-axis motion module 70.

[0034] When detecting insulating glass: First, a number of insulating glasses are loaded into the tray device 50. The tray device 50 enters the interior of the detection box 10 under the conveying action of the feeding conveyor belt 20, and the tray device 50 is transferred to a set position by the conveying roller 11. Then, the transfer device 60 transfers the tray device 50 to the soaking box 40. The soaking box 40 is filled with a colored liquid, preferably red in color. The insulating glasses on the tray device 50 are completely immersed in the colored liquid. Under the action of water pressure, the colored liquid will penetrate into the interior of the insulating glass at the places with poor sealing. Then, the transfer device 60 transfers the tray device 50 into the detection box 10, and the rinsing assembly 90 rinses the insulating glass and the tray device 50. The rinsed water flows away from the gap between adjacent conveying rollers 11, reducing the reflection and refraction caused by the accumulation of the red liquid and avoiding affecting subsequent detection. Then, driven by the three-axis motion module 70, the detection assembly 80 clamps and moves the insulating glass, and detects the airtightness of the insulating glass by color comparison during the movement until all the insulating glasses in the tray device 50 are detected. Finally, the tray device 50 is transferred to the discharging conveyor belt 30 by the conveying roller 11.

[0035] In this embodiment, for the detection of insulating glasses with different airtightness requirements, the water pressure on the insulating glass can be changed by changing the immersion height of the insulating glass in the colored liquid, or it can be achieved by increasing the soaking time.

[0036] When the airtightness detection device of the insulating glass in this embodiment is detecting, first, the insulating glass is soaked with a colored liquid, and then the airtightness of the insulating glass is detected by color comparison. Compared with the existing detection methods, the detection efficiency is higher, the detection result is more accurate, and the misjudgment caused by human observation can be eliminated.

[0037] Please refer to Figure 2 , the tray device 50 includes a base 51, a limiting assembly 52, and a suspension rod 53. The base 51 is provided with a number of drain holes to avoid the accumulation of colored liquid or rinsing water. The limiting assembly 52 is provided in several groups and is fixedly arranged on the base 51 in a rectangular array manner for restricting the insulating glass in the vertical direction. The suspension rod 53 is arranged in the middle of the base 51. The limiting assembly 52 is arranged on both sides of the suspension rod 53, and a lifting hole 54 is arranged on the suspension rod 53. In this embodiment, the limiting assembly 52 includes a number of limiting rods 55 vertically arranged on the base 51. The number of limiting rods 55 encloses a limiting cavity. The insulating glass is vertically placed in the limiting cavity and is restricted in the vertical direction. To facilitate the placement of the insulating glass, the top of the limiting rod 55 is inclined, so that the top of the limiting cavity is in a horn shape.

[0038] Please refer to Figure 3, the transfer device 60 includes a connecting plate 61, a robotic arm 62, and a gripper 63. The connecting plate 61 is located between the detection box 10 and the soaking box 40. The connecting plate 61 can be supported by a separate bracket, or fixedly connected to the outside of the detection box 10, or fixedly connected to the outside of the soaking box 40, so as to facilitate the transfer of the tray device 50. The robotic arm 62 uses an existing industrial robotic arm or industrial manipulator, etc., and the gripper 63 is installed on the robotic arm 62. The robotic arm 62 can enable the gripper 63 to move in space, such as using a three-axis moving robotic arm, a robotic arm with a horizontal rotation degree of freedom and a vertical movement degree of freedom, etc. Its specific structure belongs to the prior art and will not be elaborated here.

[0039] In this embodiment, the gripper 63 cooperates with the lifting hole 54; the height of the lifting hole 54 is higher than the center of gravity height of the insulating glass, that is, the lifting connection position is higher than the center of gravity of the entire tray device 50, thereby improving the lifting stability.

[0040] Please refer to Figures 4 to 7 , sealing plates 13 are respectively provided at the feeding end and the discharging end of the detection box 10. The top of the sealing plate 13 is connected to the detection box 10 through a turning shaft. The turning shaft is connected with a turning mechanism 12. By driving the turning of the turning shaft by the turning mechanism 12, the turning of the sealing plate 13 is driven, so as to open and close the feeding end and the discharging end, and avoid the splashing of the flushing water. The turning mechanism 12 can adopt existing mechanisms such as a motor-reducer mechanism, a motor-gear mechanism, or a hydraulic rod-lever mechanism (as Figure 4 shown), etc., as long as it can drive the turning shaft to rotate reciprocally. In order to avoid the accumulation of flushing water, in this embodiment, a plurality of drain holes are provided on the bottom wall of the detection box 10.

[0041] All the conveying rollers 11 are arranged in parallel and are respectively rotationally matched with the two opposite sides of the detection box 10. One ends of all the conveying rollers 11 extend out of the detection box 10 and are connected through a linkage structure 14. The linkage structure 14 includes a rotating shaft 141 rotatably arranged on the detection box 10, a plurality of first bevel gears 142 arranged on the rotating shaft 141, and a driving member 143 connected to the rotating shaft 141. One end of the conveying roller 11 is provided with a second bevel gear 15 meshing with the corresponding first bevel gear 142. The driving member 143 uses a motor and is fixedly installed on the detection box 10.

[0042] The flushing assembly 90 includes a spray pipe 91 horizontally arranged on the top of the detection box 10, several spray heads 92 communicated with the spray pipe 91, and a translation mechanism 93 arranged on the detection box 10 and connected to the spray pipe 91. A strip-shaped hole is arranged on one side of the detection box 10 along its extending direction. One end of the spray pipe 91 passes through the strip-shaped hole and is connected to the translation mechanism 93. The translation mechanism 93 drives the spray pipe 91 to move along the strip-shaped hole to flush the internal space of the detection box 10 and remove the colored liquid. In this embodiment, the translation mechanism 93 can adopt any mechanism that can drive the spray pipe 91 to move linearly, such as a lead screw mechanism, a piston mechanism, etc. Its specific structure belongs to the prior art and will not be elaborated here.

[0043] In this embodiment, the three-axis motion module 70 is based on the ability to achieve three-axis motion and adopts an existing three-axis motion mechanism. In this embodiment, it includes an X-axis motion module 71, a Y-axis motion module 72 arranged on the X-axis motion module 71, and a Z-axis motion module 73 arranged on the Y-axis motion module 72.

[0044] The detection component 80 includes a mounting plate 81, a clamping component 82, a background plate 83, and a color sensor 84. The mounting plate 81 is vertically arranged and connected to the moving part of the Z-axis motion module 73, that is, the mounting plate 81 can perform spatial movement through the X-axis motion module 71, the Y-axis motion module 72, and the Z-axis motion module 73. The clamping component 82 is arranged on one side of the mounting plate 81. The background plate 83 and the color sensor 84 are both connected to the fixed part of the Z-axis motion module 73 and are respectively located on both sides corresponding to the mounting plate 81. Among them, the clamping component 82 and the color sensor 84 are located on the same side of the mounting plate 81.

[0045] The clamping component 82 includes a first clamping plate 821 and a second clamping plate 822 arranged oppositely. The first clamping plate 821 and the second clamping plate 822 are respectively connected with a first telescopic driver 823. The first telescopic driver 823 is arranged on the mounting plate 81. The moving directions of the two first telescopic drivers 823 are opposite, so that the first clamping plate 821 and the second clamping plate 822 can clamp the insulating glass. Anti-slip layers are arranged on the opposite sides of the first clamping plate 821 and the second clamping plate 822 to increase the clamping friction force on the insulating glass and prevent the insulating glass from falling during the detection process.

[0046] On both sides of the mounting plate 81, there are also wiper assemblies 85 respectively, which scrape off the moisture on the surface of the insulating glass. The wiper assembly 85 includes a second telescopic driver 851 vertically arranged on the mounting plate 81 and a wiper blade 852 arranged at the bottom telescopic end of the second telescopic driver 851. Both ends of the wiper blade 852 extend to the first clamping plate 821 and the second clamping plate 822 respectively. At the same time, the height of the wiper blade 852 is lower than that of the color sensor 84, so that the insulating glass is detected after the surface moisture is scraped off, avoiding the influence of the presence of moisture on the detection result.

[0047] The detection process of the insulating glass airtightness detection device in this embodiment is as follows:

[0048] S1: Place a number of insulating glasses on the tray device 50;

[0049] S2: Place the tray device 50 on the feeding conveyor belt 20;

[0050] S3: The flipping mechanism 12 flips the sealing plate 13 at the feeding end upward, the feeding conveyor belt 20 conveys the tray device 50 into the detection box 10, and closes the corresponding sealing plate 13. At the same time, the conveying rollers 11 work to convey the tray device 50 to the set position;

[0051] S4: The transfer device 60 transfers the tray device 50 into the soaking box 40, so that the insulating glass is completely soaked in the colored solution in the soaking box 40 for a period of time, and the immersion height is determined according to the airtightness detection requirements;

[0052] S5: The transfer device 60 transfers the tray device 50 into the detection box 10, and the rinsing assembly 90 rinses the colored liquid on the surface of the tray device 50, the surface of the insulating glass, and the surfaces of other structures in the detection box 10;

[0053] S6: The three-axis motion module 70 moves the clamping assembly 82 above one of the insulating glasses, and the first clamping plate 821 and the second clamping plate 822 clamp the corresponding two side surfaces of the insulating glass through the Z-axis motion module 73 and the first telescopic driver 823;

[0054] S7: The Z-axis motion module 73 drives the clamped insulating glass to move upward. During the movement, the two wiper blades 852 respectively scrape off the moisture on the surface of the insulating glass. At the same time, the color sensor 84 obtains the color of the insulating glass from the position where the moisture is scraped off and compares it with the set reference color. When the obtained color is within the error range of the reference color, the airtightness is low. When the obtained color is outside the error range of the reference color, the airtightness is high.

[0055] S8: Put the detected insulating glass back to its original position;

[0056] S9: Repeat steps S6 to S9 until all insulating glass is detected;

[0057] S10: The flipping mechanism 12 flips the sealing plate 13 at the feeding end upward, the conveying roller 11 operates to convey the tray device 50 onto the discharging conveyor belt 30, and closes the corresponding sealing plate 13.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An airtightness detection device for insulating glass, characterized in that, Including: A detection box (10), a feeding conveyor belt (20) and a discharging conveyor belt (30) arranged at the feeding end and the discharging end of the detection box (10), a soaking box (40) arranged on one side of the detection box (10), and a tray device (50) for loading insulating glass; A plurality of conveying rollers (11) are arranged at the bottom of the detection box (10), a transfer device (60) for transferring the tray device (50) is arranged between the detection box (10) and the soaking box (40), a three-axis motion module (70) and a flushing assembly (90) are arranged at the top of the detection box (10), and a detection assembly (80) is arranged on the three-axis motion module (70); After the insulating glass is soaked in the soaking box (40) filled with colored liquid, it is clamped by the detection assembly (80) and moves up and down with the three-axis motion module (70). During the movement, the airtightness of the insulating glass is detected by color comparison.

2. The airtightness detection device for insulating glass according to claim 1, characterized in that, The detection assembly (80) includes a mounting plate (81) vertically arranged and connected to the three-axis motion module (70), a clamping assembly (82) arranged on one side of the mounting plate (81), and a background plate (83) and a color sensor (84) arranged on the three-axis motion module (70) and located on the two opposite sides of the mounting plate (81) respectively; After the insulating glass is clamped by the clamping assembly (82), it moves up and down with the mounting plate (81) driven by the three-axis motion module (70). The color sensor (84) continuously acquires the color of the insulating glass and compares it with the reference color. When the acquired color is within the error range of the reference color, the airtightness is low. When the acquired color is outside the error range of the reference color, the airtightness is high.

3. The airtightness detection device for insulating glass according to claim 2, characterized in that, The clamping assembly (82) includes a first clamping plate (821) and a second clamping plate (822) arranged oppositely; the first clamping plate (821) and the second clamping plate (822) are respectively connected with a first telescopic driver (823), and the first telescopic driver (823) is arranged on the mounting plate (81); anti-slip layers are arranged on the opposite sides of the first clamping plate (821) and the second clamping plate (822).

4. The airtightness detection device for insulating glass according to claim 3, characterized in that, Scraping assemblies (85) are arranged on both sides of the mounting plate (81); each scraping assembly (85) includes a second telescopic driver (851) vertically arranged on the mounting plate (81) and a scraping blade (852) arranged at the bottom telescopic end of the second telescopic driver (851); both ends of the scraping blade (852) extend to the first clamping plate (821) and the second clamping plate (822) respectively.

5. The airtightness detection device for insulating glass according to claim 2, characterized in that, The three-axis motion module (70) includes two sets of X-axis motion modules (71) oppositely arranged on the top of the detection box (10), a Y-axis motion module (72) arranged on the X-axis motion module (71), and a Z-axis motion module (73) arranged on the Y-axis motion module (72); the mounting plate (81) is connected to the moving part of the Z-axis motion module (73), and the background plate (83) and the color sensor (84) are connected to the fixed part of the Z-axis motion module (73).

6. The airtightness detection device for insulating glass according to claim 1, characterized in that, The transfer device (60) includes a connecting plate (61) arranged between the detection box (10) and the soaking box (40), a robotic arm (62) arranged on the connecting plate (61), and a gripper (63) arranged on the robotic arm (62); The tray device (50) includes a base (51), a plurality of limiting components (52) arranged on the base (51), and a suspension rod (53) arranged at the middle position of the top of the base (51); a lifting hole (54) matching the gripper (63) is arranged at the top of the suspension rod (53).

7. The airtightness detection device for insulating glass according to claim 6, characterized in that, The limiting component (52) includes a plurality of limiting rods (55), and all the limiting rods (55) surround to form a limiting cavity for limiting the insulating glass; the height of the lifting hole (54) is higher than the center of gravity height of the insulating glass.

8. The airtightness detection device for insulating glass according to any one of claims 1 to 7, characterized in that, Sealing plates (13) are respectively connected to both ends of the detection box (10) through a flipping mechanism (12).

9. The airtightness detection device for insulating glass according to claim 8, characterized in that, The flushing component (90) includes a spray pipe (91) horizontally arranged on the top of the detection box (10), a plurality of spray heads (92) communicated with the spray pipe (91), and a translation mechanism (93) arranged on the detection box (10) and connected to the spray pipe (91), and the translation mechanism (93) drives the spray pipe (91) to move longitudinally along the detection box (10).

10. The airtightness detection device for insulating glass according to claim 8, characterized in that, All the conveying rollers (11) are arranged in parallel and are respectively rotationally matched with both sides of the detection box (10) at both ends, and one ends of all the conveying rollers (11) are connected through a linkage structure (14); the linkage structure (14) includes a rotating shaft (141) rotatably arranged on the detection box (10), a plurality of first bevel gears (142) arranged on the rotating shaft (141), and a driving part (143) connected to the rotating shaft (141), and a second bevel gear (15) meshing with the corresponding first bevel gear (142) is arranged at one end of the conveying roller (11).

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