TWI738154B - Bellows structure of withering equipment - Google Patents

Abstract

A bellows structure of withering equipment, is included : at least one bellows, tied to the inside with a circulation space, there are multiple air outlet on the upper end. And the bellows set at least one inlet port. A convey structure have a conveyer to tied around the bellows. And the conveyer have multiple stoma. And two guide wheel is connected to the conveyer. An actuation unit is connected to one of the guide wheels For transmitting power to rotate the guide wheel and drive the conveyer. At least one airflow device set at each inlet port, supply air flows in through each inlet port and flows out through each air outlet. Hereby, about the bellows structure of withering equipment, especially ventilation structure for a conveyor belt, drive airflow through the lower end of the conveyor belt, and achieve the function of improving ventilation.

Description

Bellows structure of withering equipment

The present invention is related to a bellows structure of a withering equipment, especially a type used for conveying With the ventilation structure, the lower end of the conveyor belt drives the airflow to achieve the function of enhancing the ventilation effect.

By the way, drinking tea is a long-standing habit in Asia, and tea needs to be made into brewable The finished product needs to go through a complicated process, which is that the harvested tea greens go through the processes of sunlight withering, indoor withering, stirring, standing, killing the greens, rolling, rolling, deblocking, and drying to complete the final tea products; First of all, the fresh tea leaves must be spread out and exposed to sunlight to moderately evaporate the water content to reduce the water content, and then transferred to the room to continue the fermentation caused by sunlight, and stir to make it uniform. To help the remaining water vapor out of the water by turning, and make it rub against each other to destroy the leaf margin cells, so that the air enters the leaf flesh, further promotes the fermentation effect, until the fragrance is produced, and after standing for a period of time, it produces a fruity fragrance, and The tea leaves can be removed to kill the cyan, and the temperature is controlled to make the tea cyanines fried thoroughly; then the tea leaves are pressed and kneaded by kneading to bring the internal juice out and adhere to the surface, so that subsequent consumers can dissolve in hot water during brewing. Then spread it out and let it cool; Afterwards, the tea leaves are gradually curled into a hemispherical or spherical shape through kneading, deblocking, and re-frying, and the original activity is maintained. The high temperature of the dryer is used to inhibit the residual enzyme activity during fermentation, and the moisture content is reduced to fix the tea. Quality, to complete the tea that can be brewed; At this point, the traditional withering requires spreading heat and reducing the water content in the tea greens with the sun before it is transferred indoors for continuous withering, so as to continue the fermentation effect produced by the tea, and the tea is stirred by stirring. , To help water and make the tea leaves rub against each other, so that air enters the mesophyll cells to promote fermentation, and after a period of standing, the aroma will be produced, and the follow-up operations such as killing cyanine can be carried out; Therefore, more companies place it in the room and use a fan to blow away the evaporated water vapor to wither, thereby simplifying the tea making steps, so that the control of the tea production process tends to be stable, and the quality of the production is stabilized. Rollers are used. Rotation increases the withering process of tea leaves and uses the indoor space by flattening and stacking the shelves.

However, according to the above, we know that in the traditional tea making method, the sun wilt in the first part When withered, during the process of spreading and sun exposure, harmful substances and dust may be attached to the outdoor air. In particular, it needs to be exposed to sunlight and cannot be covered with cloth to prevent dust, or even contact with birds, beasts, insects, etc. during the exposure process, resulting in The quality is flawed. Moreover, the temperature and time of the sun are not easy to control, and the weather is difficult to predict, which causes the quality of the finished tea to fluctuate. When the roller is used in the indoor withering, although the efficiency of bringing out water vapor can be improved by continuous flipping, However, it is easy to damage the complete structure of the tea leaves during the long-time turning process, and after taking it out, it still needs to be laid and placed calmly. It is also difficult to effectively dissipate the moisture inside due to the stacking of the tea leaves, which is really troublesome and inconvenient. , And urgently need to be improved.

In view of this, and based on years of relevant experience in this field, the inventor carefully Observation and research, combined with theoretical application, and then propose a reasonable and effective invention to improve the above-mentioned shortcomings.

The main purpose of the present invention is to relate to the bellows structure of a withering equipment, Especially it refers to a kind of ventilation structure used in conveyor belt, which can achieve the function of enhancing the ventilation effect by driving the airflow at the lower end of the conveyor belt.

The bellows structure of a withering equipment of the present invention includes: At least one wind box has a circulation space on the inner side, and a plurality of airflow openings are arranged on the upper end; and the wind collecting box is further provided with at least one inlet. In a state of communication, for air flow; A conveying structure is provided with a conveyor belt, which is arranged around the upper and lower ends of the air collecting box; and the conveyor belt is provided with a plurality of air holes, so that the air holes of the conveyor belt are displaced to the air outlets of the air collecting box The upper end is used to guide the air flow to the upper end of the conveyor belt; two guide wheels are arranged at the front and rear ends of the wind box and are pivotally connected to the conveyor belt, and the actuating unit is pivotally connected to one of the guide wheels, For transmission of power to rotate the guide wheel and drive the conveyor belt; At least one air flow device is arranged at each inlet in accordance with the number of inlets of the wind box, and is used to drive the airflow to flow in from the inlets of the wind box and flow out from the air outlets at the upper end of the wind box . The air collecting box is presented in a plurality of front and rear arrays, and the conveyor belt of the conveying structure is arranged around the arranged air collecting boxes; Among them, the conveyor belt of the conveying structure is provided with two guide rails on both sides of each wind box in a corresponding state, and a guide groove is provided on the inner side, and the side end of the conveyor belt is provided with a guide groove corresponding to the guide groove. The protruding part makes the conveyor belt extend along the guide grooves of the guide rails and drive; Wherein, the conveyor belt is arranged and connected by a plurality of supporting plate parts, and each supporting plate part is presented in a long sheet shape, and the front and rear sides of each supporting plate part are provided with a plurality of connecting parts to be buckled with each other to form an endless belt; The two sides of each guide wheel are provided with a plurality of pivoting parts; and the two sides of each supporting plate member are matched with the width between the pivotal parts on both sides of each guide wheel, and there are a plurality of linkage parts for each guide wheel. Each pivoting piece is pivotally connected to drive; Each airflow device is provided with a driving part, a blast part and an air inlet pipe: the driving part is connected to the blast part; and the blast part is provided with a fan body so that the driving part can drive the fan The body; the air inlet pipe is connected to the blast part to connect to the inlet of the wind box; Wherein, the two sides of the conveyor belt of the conveying structure are further provided with a baffle plate, which is extended upward to be blocked at the upper end of the conveyor belt; There is a pressure stabilizing part on the inner side of each air collecting box, which is arranged at each inlet, and is in a recessed shape downwards for the stabilizing part to drive the air flow downward; The wind box is also provided with at least one adjustment door for internal cleaning; The upper end of the conveying structure is further provided with a height-limiting structure, which is a reserved height with the conveying structure, and is provided with an adjuster and a shifter for the adjuster to move the shifter to limit the height.

The effect of the present invention is that, with at least one wind box, there is a circulation space on the inside. In the meantime, the upper end of the air collecting box is provided with a plurality of airflow openings; and the air collecting box is further provided with at least one inlet. The inlets of the box are in a connected state for air flow; and the conveying structure is provided at the outer end of the air collecting box, and a conveyor belt is arranged around the upper and lower ends of the air collecting box; and the conveying structure The conveyor belt is provided with a plurality of air holes, so that the air holes of the conveyor belt of the conveying structure are displaced to the upper end of the airflow openings of the air collecting box for guiding the air flow to the upper end of the conveying belt of the conveying structure; two guide wheels, tied Located at the front and rear ends of the air collecting box, and pivotally connected to the conveyor belt of the conveying structure, the actuating unit is pivotally connected to one of the guide wheels of the conveying structure to transmit power to rotate the guide wheel of the conveying structure And drive the conveyor belt of the conveying structure; and by at least one airflow device, it is set at each inlet of the air collecting box according to the number of inlets of the air collecting box for driving The air flow flows in from the inlets of the air collecting box and flows out from the air outlets at the upper end of the air collecting box; thereby, it is related to the wind box structure of a withering equipment, especially a ventilation structure used in a conveyor belt. The airflow is driven by the lower end of the conveyor belt to achieve the function of enhancing the ventilation effect.

In order to enable your reviewer to have a further understanding of the purpose, features and effects of the present invention For understanding and understanding, please cooperate with the following (a brief description of the diagram) as detailed below: Please refer to Figures 1 to 7, which is the "wind box structure of withering equipment" of the present invention, which includes: at least one wind box 1, a conveying structure 2 and at least one air flow device 3, of which: The air collecting box 1 has a circulation space 10 on the inner side, and a plurality of airflow openings 11 are arranged at the upper end; and the air collecting box 1 is further provided with at least one inlet 12, so far, the circulation space 10 and each airflow opening 11 is in communication with each inlet 12 for air flow; The conveying structure 2 is provided with a conveying belt 21, which is wound around the upper and lower ends of the air collecting box 1. In addition, the conveying belt 21 is provided with a plurality of air holes 211, so that the air holes 211 of the conveying belt 21 are displaced to the The upper end of each airflow port 11 of the air collecting box 1 is used to guide the air flow to the upper end of the conveyor belt 21; two guide wheels 22 are arranged at the front and rear ends of the air collecting box 1, and are pivotally connected to the conveyor belt 21. The driving unit 23 is pivotally connected to one of the guide wheels 22 for transmitting power to rotate the guide wheel 22 and drive the conveyor belt 21; At least one airflow device 3 is arranged at each inlet 12 in accordance with the number of inlets 12 of the air collecting box 1, for driving airflow into the air collecting box 1 from the inlets 12, and from the air collecting box 1 Flow out from each airflow port 11 at the upper end; With the above structure, it is further explained as follows: The aforementioned air collecting box 1 is presented in a plurality of front-to-rear arrays, and the conveyor belt 21 of the conveying structure 2 is arranged around each air collecting box 1 in the arrangement; The aforementioned conveyor structure 2 has two guide rails 24 on both sides of the conveyor belt 21, which are arranged on both sides of each wind box 1 in a corresponding state, and a guide groove 241 is provided on the inner side, and the side end of the conveyor belt 21 is attached There is a protruding part 212 that matches the guide groove 241, so that the conveyor belt 21 extends along the guide groove 241 of each guide rail 24 to move and drive; The conveyor belt 21 is arranged and assembled with a plurality of bearing plate members 213, and each bearing plate member 213 is presented in the form of a long sheet. The front and rear sides of each bearing plate member 213 are provided with a plurality of connecting pieces 2131 to form a mutual buckle. Ring type A plurality of pivotal members 221 are provided on both sides of the aforementioned guide wheels 22; and the two ends of each supporting plate member 213 are matched with the width between the pivotal members 221 on both sides of the guide wheels 22, and a plurality of linkage members 2132 are provided. , For each pivoting member 221 of each guide wheel 22 to be pivotally driven; The aforementioned airflow devices 3 are provided with a driving part 31, a blast part 32 and an air inlet pipe 33; the driving part 31 is connected to the blast part 32; and the blast part 32 is provided with a fan body 321, So that the driving part 31 drives the fan body 321; the air inlet pipe 33 is connected to the blast part 32 to connect to the inlet 12 of the wind box 1; The two sides of the conveyor belt 21 of the aforementioned conveyor structure 2 are further provided with a baffle plate 25 on each pivot, which extends upwards for blocking the upper end of the conveyor belt 21; There is a pressure stabilizing part 13 on the inner side of each of the aforementioned air collecting boxes 1, which is arranged at each inlet 12 and is in the shape of a recess downward, for the pressure stabilizing part 13 to drive the airflow downward; The aforementioned wind box 1 is further provided with at least one adjustment door 14 for internal cleaning; The above-mentioned conveying structure 2 is further provided with a height-limiting structure 4 at the upper end, which is a reserved height with the conveying structure 2, and is provided with an adjuster 41 and a shifter 42 for the adjuster 41 to move the shifter. The actuator 42 limits the height; Based on the above, the preferred embodiment of the "wind box structure of withering equipment" of the present invention is described in detail as follows: First of all, the present invention is used in the withering process of tea leaves after harvesting. The circulation space 10 of the air collecting box 1, the airflow openings 11 of the air collecting box 1, and the inlet openings 12 of the air collecting box 1 In a connected state; and the conveyor belt 21 of the conveyor structure 2 is wound around the upper and lower ends of the air collecting box 1, and the conveyor belt 21 is provided with a plurality of air holes 211, so that the air holes 211 of the conveyor belt 21 are driven to the When the upper end of the air collecting box 1 is corresponding to the airflow openings 11 at the upper end of the air collecting box 1, the air flow can be guided to the upper end of the conveyor belt 21, and set at the front and rear ends of the air collecting box 1 via two guide wheels 22 And pivotally connected to the conveyor belt 21 of the conveying structure 2, so that the guide wheels 22 of the conveying structure 2 can support the conveyor belt 21 of the conveying structure 2, and are pivotally connected to the conveying structure 2 via the actuating unit 23 At one of the guide wheels 22, the guide wheel 22 is rotated by transmission power to drive the conveyor belt 21 to run; and through the airflow device 3, it is set at each inlet in accordance with the number of inlets 12 of the air collecting box 1. Twelve locations are used to drive the external air to generate air flow and flow in from the inlets 12 of the air collecting box 1, and flow out from the air openings 11 at the upper end of the air collecting box 1, so that the air flows from the air collecting boxes located in the air collecting box 1. The air hole 211 of the conveyor belt 21 of the conveying structure 2 at the upper end of the airflow port 11 flows out; So far, in the present invention, the harvested tea leaves are placed at the upper end of the conveyor belt 21 of the conveying structure 2. The conveyor belt 21 of the conveying structure 2 can be arranged and assembled by a plurality of plate members 213. The conveyor belt Each bearing plate 213 of 21 is presented in the shape of a long strip. The front and rear sides of each bearing plate 213 of the conveyor belt 21 are provided with a plurality of connecting pieces 2131 which are interlocked to form a ring shape, so that the tea can be stably placed. At the upper end of each bearing plate 213 and on both sides of the conveyor belt 21 passing through the conveying structure 2, there are further guide rails 24, which are arranged on both sides of each wind box 1 in a corresponding state, and the guide grooves are provided on the inner side. 241, and the side end of the conveyor belt 21 is provided with a protruding part 212 that matches the guide groove 241 , So that the conveyor belt 21 extends along the guide groove 241 of each guide rail 24 to move and drive, so that it is more stable when being driven. Among them, the two sides of each guide wheel 22 are provided with a plurality of pivotal members 221; and the ends of each supporting plate member 213 are According to the width between the pivotal members 221 on both sides of each guide wheel 22, a plurality of linkage members 2132 are provided for the pivotal members 221 of each guide wheel 22 to be pivotally driven, so that the actuating unit 23 drives each guide Wheel 22, and the connecting member 2132 of the supporting plate member 213 of the conveyor belt 21 is pulled by the pivot member 221 of each guide wheel 22, so that it can displace the placed tea leaves; Furthermore, the harvested tea leaves can be stacked and displaced so that they are evenly distributed on the upper end of the conveyor belt 21 of the conveying structure 2 for withering, and each airflow device 3 is provided with the driving part 31 and the blowing part 32 and the air inlet pipe 33 are connected to the blasting part 32 by the driving part 31; and the blasting part 32 is provided with the fan 321, so that the driving part 31 drives the fan 321 to rotate The air flows from the blast portion 32 to the inlet pipe 33; and the inlet pipe 33 is connected to the blast portion 32 and connected to the inlets 12 of the wind box 1, and the airflow The driving part 31 of the air flow device 3 drives the blowing part 32 to generate air flow, which is led out by the air inlet pipe 33 and flows into the air inlets 12 of the air collecting box 1, so that the air flow is led out from the air outlets 11 , And lead to the air holes 211 of the conveyor belt 21, so that the tea stacked on the upper end can be led out from the air below and circulate through the gap, making the withering effect more stable; Thereby, the air collecting box 1 can be arranged in a plurality of front and back rows, so that the conveyor belt 21 of the conveying structure 2 is arranged around each air collecting box 1 in the arrangement, so each air collecting box 1 can be set by different The air volume is used to achieve the required construction method and effect when withering; in addition, a stabilizing part 13 can be provided on the inner side of each air collecting box 1, which is located at each inlet 12 and is in a recessed shape downwards. When in use When air flows in from each inlet 12 at the side end of the wind box 1, prevent the wind pressure of each air outlet 11 far away from each inlet 12 from being reduced, so that the average wind pressure can stabilize the withering effect; So far, the present invention can be provided with baffles 25 on both sides of the conveyor belt 21 of the conveying structure 2, which are extended upward to block the upper end of the conveyor belt 21, so as to increase the stacking volume of tea leaves and increase the air flow from the lower end. The efficiency of withering when the airflow flows through the mouth 11; and when stacking, the height-limiting structure 4 can be provided at the upper end of the conveying structure 2, which is a reserved height with the conveying structure 2 to limit the height of the tea stack. It has the adjuster 41, which can adjust the height required by the shifter 42 provided at the adjuster 41, and then the shifter 42 breaks up the tea leaves that exceed the stack height, so it can be driven by the conveyor belt 21 At the same time, the shifter 42 is used to limit the stacking height of tea leaves and spread them evenly. ； In addition, the present invention is further provided with at least one adjustment door 14 at the air collecting box 1, which can clean the inside of the air collecting box 1 after use, to prevent tea leaves, dust and dirt from falling into the interior, thereby affecting the airflow Cleanliness Finally, in particular, the present invention is used in the withering process after tea harvesting. According to the tea technology used, the present invention can be installed in a room with constant temperature control, and compared to general withering, the present invention can be used more effectively. The structure is stacked up and down to be used in order to accommodate more tea leaves in a certain space for withering, without causing the problem of poor airflow and too dense to prevent the water vapor from dissipating, and the present invention can even more in a stacked state, Multiple conveyor belts are connected to the upper and lower ends of the conveying structure 2 of the present invention, so that it can place the freshly picked fresh tea leaves on the multiple conveyor belts and transport it to the uppermost conveying structure 2, which can be in the upper conveying structure Accumulate a certain amount of accumulation at 2 locations and then displace each conveyor belt 21, so that each height-limiting structure 4 can be moved to an appropriate thickness by the shifter 42, and can move to the next layer of conveying structure 2 gradually when stacked Reduce the thickness and evenly disperse it, and by controlling the air flow of each of the air collecting boxes 1, it is possible to adjust the withering effect caused by different air flow when the tea leaves of different thickness are stacked, without excessive stacking. The tea leaves cannot circulate airflow; Based on the above description, the effect of the bellows structure of the withering equipment of the present invention is that at least one wind box 1 is provided with a circulation space 10 inside, and the upper end of the wind box 1 is provided with a plurality of airflow ports 11; and The air collecting box 1 is further provided with at least one inlet 12, so far, the circulation space 10 of the air collecting box 1, the airflow openings 11 of the air collecting box 1 and the inlets 12 of the air collecting box 1 are in communication State, air flow is provided; and the conveying structure 2 is provided at the outer end of the air collecting box 1, and a conveyor belt 21 is arranged around the upper and lower ends of the air collecting box 1; and the conveying belt of the conveying structure 2 21 is provided with a plurality of air holes 211, so that the air holes 211 of the conveyor belt 21 of the conveying structure 2 are displaced to the upper end of each air outlet 11 of the air collecting box 1 for guiding air flow to the upper end of the conveying belt 21 of the conveying structure 2 ; Two guide wheels 22 are located at the front and rear ends of the air collecting box 1, and are pivotally connected to the conveyor belt 21 of the conveying structure 2, and the actuating unit 23 is pivotally connected to one of the guide wheels of the conveying structure 2 At 22 places, the guide wheels 22 of the conveying structure 2 are used for transmission power to drive the conveying belt 21 of the conveying structure 2; and at least one airflow device 3 is arranged to match the number of the inlets 12 of the wind box 1 At each inlet 12 of the air collecting box 1, it is provided for driving the air flow to flow in from the air inlets 12 of the air collecting box 1, and to flow out from the air outlets 11 at the upper end of the air collecting box 1; The bellows structure of the withering equipment is related, especially a ventilation structure used in the conveyor belt, which drives the airflow at the lower end of the conveyor belt to achieve the function of enhancing the ventilation effect.

In summary, it should be understood that the present invention can indeed be widely used by related industries and is extremely advanced. In addition, the invention has not been disclosed before the application, and it has complied with the provisions of the Patent Law. I filed an application for a patent for invention in accordance with the law. However, the above is only one of the preferred embodiments of the present invention, and should not be used to limit the present invention. Explain the scope of implementation; that is, all equal changes and modifications made in accordance with the scope of the patent application of the present invention should still fall within the scope of the patent of the present invention.

〔this invention〕 1: Collecting bellows 10: Circulation space 11: Airflow port 12: Inlet 13: Voltage stabilizing department 14: Adjust the door 2: Conveying structure 21: Conveyor belt 211: Stoma 212: Protruding part 213: bearing plate 2131: connector 2132: Linkage 22: guide wheel 221: Pivot 23: Actuation unit 24: Rail 241: guide slot 25: bezel 3: Airflow device 31: Drive 32: Blower 321: Fan Body 33: Inlet pipe 4: Height limit structure 41: adjuster 42: dial

Figure 1 is a perspective view of the present invention. Figure 2 is a three-dimensional partial exploded schematic view of the present invention. Figure 3 is a three-dimensional schematic diagram of the bearing plate of the present invention. Figure 4 is a schematic partial cross-sectional view of the present invention. Figure 5 is a schematic diagram of the assembling of the complex number bellows of the present invention. Figure 6 is a schematic cross-sectional view of the wind box of the preferred embodiment of the present invention. Figure 7 is a diagram of the use state of the preferred embodiment of the present invention.

1: Collecting bellows

2: Conveying structure

21: Conveyor belt

22: guide wheel

23: Actuation unit

24: Rail

3: Airflow device

31: Drive

32: Blower

33: Inlet pipe

Claims (10)

A bellows structure of withering equipment, including: At least one wind box has a circulation space on the inner side, and a plurality of airflow openings are arranged on the upper end; and the wind collecting box is further provided with at least one inlet. In a state of communication, for air flow; A conveying structure is provided with a conveyor belt, which is arranged around the upper and lower ends of the air collecting box; and the conveyor belt is provided with a plurality of air holes, so that the air holes of the conveyor belt are displaced to the air outlets of the air collecting box The upper end is used to guide the air flow to the upper end of the conveyor belt; two guide wheels are arranged at the front and rear ends of the wind box and are pivotally connected to the conveyor belt, and the actuating unit is pivotally connected to one of the guide wheels, For transmission of power to rotate the guide wheel and drive the conveyor belt; At least one air flow device is arranged at each inlet in accordance with the number of inlets of the wind box, and is used to drive the airflow to flow in from the inlets of the wind box and flow out from the air outlets at the upper end of the wind box . The bellows structure of the withering equipment according to claim 1, wherein the bellows are arranged in a plurality of front and back rows, and the conveyor belt of the conveying structure is arranged around the arranged bellows. The bellows structure of the withering equipment described in claim 1, wherein two guide rails are provided on both sides of the conveyor belt of the conveying structure, which are arranged on both sides of each bellows in a corresponding state, and a guide groove is provided on the inner side, and The side end of the conveyor belt is provided with a protruding part matching the guide groove, so that the conveyor belt is driven by the displacement of the guide grooves of the guide rails. The bellows structure of the withering equipment as described in claim 1, wherein the conveyor belt is arranged and assembled by a plurality of bearing plate members, and each bearing plate member is presented in a strip shape, and each bearing plate member is provided with plural numbers on the front and rear sides. The connecting pieces are buckled with each other to form an endless belt type. For the bellows structure of the withering equipment described in claim 4, a plurality of pivotal members are arranged on both sides of each guide wheel; and the two sides of each supporting plate member are matched with the width between the pivotal members on both sides of each guide wheel, A plurality of linkage members are provided for pivoting and driving of each pivoting member of each guide wheel. According to claim 1, the wind box structure of the withering equipment, wherein each air flow device is provided with a driving part, a blowing part and an air inlet pipe: the driving part is connected to the blowing part; and the blowing part A fan body is provided to enable the drive part to drive the fan body; the air inlet pipe is connected to the blast part to be connected to the inlet of the wind box. The bellows structure of the withering equipment according to claim 1, wherein a baffle plate is pivoted on both sides of the conveyor belt of the conveying structure, which extends upward to block the upper end of the conveyor belt. The bellows structure of the withering equipment as described in claim 1, in which a stabilizing part is provided on the inner side of each collecting bellows, which is arranged at each inlet, and is in the shape of a notch downward for the stabilizing part to make air flow The flow is driven downwards. According to claim 1, the wind box structure of the withering equipment, wherein the wind box is further provided with at least one adjustment door for internal cleaning. The bellows structure of the withering equipment described in claim 1, wherein the upper end of the conveying structure is further provided with a height-limiting structure, which is a reserved height with the conveying structure, and is provided with an adjuster and a shifter. Allow the adjuster to move the dial to limit the height.

Images