CN217971079U - Bar-shaped material layer-changing conveying device - Google Patents
Bar-shaped material layer-changing conveying device Download PDFInfo
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- CN217971079U CN217971079U CN202221081215.7U CN202221081215U CN217971079U CN 217971079 U CN217971079 U CN 217971079U CN 202221081215 U CN202221081215 U CN 202221081215U CN 217971079 U CN217971079 U CN 217971079U
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Abstract
The utility model provides a bar-shaped material trades layer conveyor, include: the upper layer conveying ring and the lower layer conveying ring are arranged on the rear side of the back plate, and the upper layer conveying ring and the lower layer conveying ring are characterized in that a steering channel is arranged on the front side of the back plate, the inlet end of the steering channel is connected with the output end of the upper layer conveyor, the outlet end of the steering channel is connected with the input end of the lower layer conveyor, and the input end of the upper layer conveyor and the output end of the lower layer conveyor are respectively connected with the upper layer conveying ring and the lower layer conveying ring through corresponding tensioning and deviation adjusting mechanisms. The material from the upper conveying ring can be conveniently connected onto the upper conveyor, enters the steering channel through the output end of the upper conveying ring, changes the conveying direction and then enters the lower conveyor, and then enters the lower conveying ring through the output end of the lower conveying ring to finish the steering conveying of the upper layer and the lower layer, so that the continuous layer changing of the rod-shaped materials among the multi-layer storage conveying rings is realized, and the rod-shaped materials can be ensured to be kept in a flat and stable state at the transition positions of climbing, descending, layer changing and the like.
Description
Technical Field
The utility model relates to a rod material conveyor, especially a cigarette or filter rod device of carrying of trading a layer belongs to cigarette and trades a layer and carries design and manufacturing technical field.
Background
In the production and conveying process of rod-shaped materials such as cigarettes or filter rods, the rod-shaped materials produced by an upstream machine are conveyed in a mode of climbing, descending, continuously changing layers among multiple layers of storage conveying rings and the like besides the fluctuation of the rod-shaped materials produced by the upstream machine due to various factors, the rod-shaped materials on the upper layer can be in a state of fluctuating in addition to the phenomenon that the rod-shaped materials roll on a conveying channel due to the factors, particularly after the rod-shaped materials turn to enter a connecting channel, the rod-shaped materials roll due to the speed difference between the inside and the outside of the channel to generate rod disorder, the material quality is influenced, and equipment operation faults are caused due to the blockage easily. In view of such circumstances, it is necessary to design a rod-shaped material layer-changing conveying device to solve the above problems.
Disclosure of Invention
The utility model aims at providing a bar-shaped material trades layer conveyor realizes bar-shaped material and carries the layer change in succession between the ring in multilayer storage to ensure bar-shaped material can keep level and smooth, stable state at transition positions such as climbing, downhill path, layer change.
The utility model discloses a following technical scheme realizes: a rod-like material layer-changing conveying device, comprising: the material feeding device comprises a back plate arranged on a barrel, an upper layer conveying ring and a lower layer conveying ring which are arranged on the back side of the back plate, and is characterized in that a steering channel is arranged on the front side of the back plate, the inlet end of the steering channel is connected with the output end of an upper layer conveyor, the outlet end of the steering channel is connected with the input end of a lower layer conveyor, the input end of the upper layer conveyor and the output end of the lower layer conveyor are respectively connected with the upper layer conveying ring and the lower layer conveying ring through corresponding tensioning and deviation adjusting mechanisms, so that materials from the upper layer conveying ring can be connected onto the upper layer conveyor, the conveying direction is changed through the output end of the upper layer conveyor and the steering channel, the materials are fed onto the lower layer conveyor, and then the lower layer conveying rings are fed through the output end of the lower layer conveyor, so that the steering conveying of the upper layer conveying rings and the lower layer conveying rings is completed.
The upper layer conveying ring and the lower layer conveying ring are provided with a plurality of groups of bosses and annular grooves, and the bosses and the annular grooves are used for increasing friction force while conveying materials, so that the materials are relatively stable in the conveying process.
The outside of the turning channel is provided with an arc plate protruding outwards, and the inside of the turning channel is provided with a flexible stopper, wherein:
the outer side of the upper end of the arc-shaped plate is fixed on the back plate through a mounting seat, and the lower end of the arc-shaped plate is connected with the input end of the lower-layer conveyor;
the upper end of the flexible stopper is hinged to two sides of the output end of the upper-layer conveyor through a hinge shaft, the lower end of the flexible stopper is suspended in the air to be in a free state, a plurality of cylinders or round rollers are connected with each other through fixed chains or fixed ropes at two ends of the flexible stopper to form a follow-up and variable chain type component, and conveyed rod-shaped materials are pressed through the follow-up and variable characteristics of the flexible stopper, so that the rod-shaped materials are smoothly steered and conveyed to the lower-layer conveyor to be stably conveyed.
The flexible blocking part is a flexible plate or a chain plate hinged with each other, and the follow-up and variable flexible plate or the chain plate hinged with each other is used for pressing the conveyed rod-shaped materials, so that the rod-shaped materials are smoothly conveyed in the process of being smoothly turned and conveyed to the lower-layer conveyor.
The outside of arc inwards squints, makes the bottom of arc form the low outside high slope end in, and the material is in the trend of leanin when turning to passageway 4 through this, can not fall and drop outwards.
The arc-shaped plate comprises an arc-shaped plate at the upper end and a vertical plate at the lower part.
Be equipped with the photoelectric switch who detects that putty used and controller electrical connection on the mount pad, when the material takes place to block up to the settlement height, block up signal transmission to controller through photoelectric switch, control its stall through the controller.
The upper and lower layer conveyer all includes that the main part is dull and stereotyped, and the dull and stereotyped one end of this main part is equipped with initiative band roller, and the other end is connected with the driven band roller through tensioning tuningout mechanism, and the cover has the hold-in range on initiative, the driven band roller, and the initiative band roller links to each other with power unit to make initiative band roller, driven band roller rotate under power unit drives, and then drive the hold-in range and remove, accomplish the material and carry.
The tensioning and deviation-adjusting mechanism comprises a groove arranged on a main body flat plate of the upper or lower layer conveying mechanism, the groove is communicated with a horizontal through groove at the end part of the main body flat plate, a vertical through hole communicated with the horizontal through groove is arranged at the top of the horizontal through groove, the inner end of a telescopic plate penetrates through the horizontal through groove and extends into the groove, a sliding groove is arranged on the telescopic plate at the inner end and is matched with a guide pin arranged in the vertical through hole, the inner end of the telescopic plate extending into the groove is fixed on the main body flat plate through the guide pin, adjusting screws with nuts are respectively arranged on two sides of the sliding groove at the inner end of the telescopic plate, two sides of the outer end of the telescopic plate are respectively connected with a roller shaft of a driven belt roller through the inner side of a flange bearing in a rotating mode, the outer side of the flange bearing is connected with a shaft hole corresponding to the inner end of a transition plate in a rotating mode, a plurality of teeth are arranged at the outer end of the transition plate and are overlapped in an annular groove of the upper layer conveying ring, so that the adjusting screws, the transition plate are driven to extend out or retract after the nuts are operated to drive the adjusting screws, the transition plate to extend or retract, tensioning and deviation-adjusting mechanism, and rod-shaped materials are transferred from the upper layer conveying mechanism through a steering channel, and then transferred into the upper layer conveying mechanism.
The outer sides of the upper and lower layer conveyors are respectively provided with a material arranging mechanism which is a vertical hollow cylinder with an inner cavity and an outer smooth cylinder, a cover plate at the upper end of the cylinder is connected with a bearing seat through a vertical rod, the bearing seat is fixed on a lower end plate of the cylinder, the middle part of the bearing seat is provided with a bearing, the inner circle of the bearing is sleeved on a hollow shaft sleeve, the lower end of the hollow shaft sleeve is connected with the vertical end of an L-shaped supporting seat through a connecting pin, the horizontal end of the L-shaped supporting seat is fixed on a main body flat plate, so that rod-shaped materials which are faked outwards are arranged and returned through follow-up and smooth cylinders in an arranging mode in the conveying process.
The upper and lower layer conveyors are provided with a plurality of groups in the height direction and are used for being matched and connected with the upper and lower layer conveying rings which are arranged in a multilayer manner from top to bottom so as to meet the requirements of multilayer storage and multilayer steering conveying.
The utility model has the following advantages and effects; by adopting the scheme, the material from the upper conveying ring can be conveniently connected onto the upper conveyor, enters the steering channel through the output end of the upper conveying ring, changes the conveying direction and then enters the lower conveyor, and then enters the lower conveying ring through the output end of the lower conveying ring, so that the upper and lower steering conveying are completed, the continuous layer changing of the rod-shaped material among the multi-layer storage conveying rings is realized, and the rod-shaped material can be ensured to be kept in a flat and stable state at the transition positions of climbing, descending, layer changing and the like.
Drawings
FIG. 1 is a schematic view of a partial structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a view of the guide pin of FIG. 3;
FIG. 5 is a diagram of upper and lower conveyor drive mechanisms;
FIG. 6 is a schematic view of a material sorting mechanism;
FIG. 7 is a partial block diagram of the upper and lower layer transport rings;
FIG. 8 is a cross-sectional structural view of FIG. 7;
FIG. 9 is a schematic view of the operation of the flexible barrier;
FIG. 10 is a schematic view of another flexible barrier in operation.
Detailed Description
The utility model provides a bar-shaped material trades layer conveyor for realize bar-shaped material can be smooth, trade the layer in succession between the multilayer storage transport ring, can arrange in the left side or the right side of storage section of thick bamboo, it includes:
the device comprises a back plate 1 arranged on a cylinder body, an upper-layer conveying ring 6 and a lower-layer conveying ring 7 arranged on the rear side of the back plate 1, and a steering channel 4 arranged on the front side of the back plate 1, wherein the inlet end of the steering channel 4 is connected with the output end of an upper-layer conveyor 2, the outlet end of the steering channel 4 is connected with the input end of a lower-layer conveyor 3, the input end of the upper-layer conveyor 2 and the output end of the lower-layer conveyor 3 are respectively connected with the upper-layer conveying ring 6 and the lower-layer conveying ring 7 in a tower mode through corresponding tensioning and deviation adjusting mechanisms 24, as shown in the figures 1 and 2, so that materials from the upper-layer conveying ring 6 are connected onto the upper-layer conveyor 2, the conveying directions are changed through the output end of the upper-layer conveyor 2 and the steering channel 4, the materials are sent onto the lower-layer conveyor 3, and then are sent into the lower-layer conveying ring 7 through the output end of the lower-layer conveyor 3, and the steering conveying rings 6 and 7 are completed;
the upper and lower conveying rings 6 and 7 are conventional devices, and are provided with a plurality of groups of annular bosses 61 and annular grooves 62, and rod-shaped materials are transversely (vertically) stacked on the conveying rings, as shown in fig. 7 and 8, so that the friction force of the materials on the conveying rings is increased while the materials are conveyed, and the materials are kept stable in the conveying process;
an outward convex arc-shaped plate 42 is arranged on the outer side of the steering channel 4, and a flexible stopper 5 is arranged on the inner side of the steering channel, wherein: the outer side of the upper end of the arc-shaped plate 42 is fixed on the back plate 1 through a conventional mounting seat 41, and the lower end of the arc-shaped plate is connected with the input end of the lower layer conveyor 3;
the outer side of the arc-shaped plate 42 is inclined inwards, so that the bottom end of the arc-shaped plate 42 forms an inclined end with a low inner part and a high outer part, and materials are in an inwards inclined trend when passing through the turning channel 4 and cannot fall off due to outward falling;
the upper end of the flexible stopper 5 is hinged to two sides of the output end of the upper-layer conveyor 2 through a hinge shaft, the lower end of the flexible stopper is suspended in the air to be in a free state, a plurality of cylinders or round rollers are connected with each other through fixed chains or fixed ropes at two ends of the flexible stopper to form a follow-up and variable chain type component, and conveyed rod-shaped materials are pressed through the follow-up and variable characteristics of the flexible stopper 5, so that the rod-shaped materials are smoothly conveyed in the process of being smoothly turned and conveyed to the lower-layer conveyor 3;
obviously, the flexible stop 5 can also be provided as a flexible plate or as a hinged link plate;
the mounting base 41 is provided with a photoelectric switch which is used for detecting material blockage and is electrically connected with the controller, when the materials are blocked and accumulated to a set height, a blocking signal is sent to the controller through the photoelectric switch, and the controller is used for controlling the material to stop running;
obviously, the arc plate 42 can also be replaced by a baffle plate with an arc plate at the upper end and a vertical plate at the lower part, as shown in fig. 10;
the upper and lower layer conveyors 2, 3 and the tensioning and deviation-adjusting mechanism 24 and the transition plate 25 connected with the upper and lower layer conveyors have the same structure, only the upper layer conveyor 2 is described here, which comprises a main body flat plate 22, one end of the main body flat plate 22 is provided with a driving belt roller 21, the other end is connected with a driven belt roller 27 through the tensioning and deviation-adjusting mechanism 24, the driving and driven belt rollers 21, 27 are sleeved with a synchronous belt 23, the driving belt roller 21 is connected with a power mechanism, so that the driving belt roller 21 and the driven belt roller 27 are driven by the power mechanism to rotate, and the synchronous belt 23 is driven to move, thereby completing material conveying;
the tensioning and deviation-adjusting mechanism 24 comprises a groove 221 arranged on the main body flat plate 22, the groove 221 is communicated with a horizontal through groove at the end part of the main body flat plate 22, a vertical through hole 222 communicated with the horizontal through groove is arranged at the top of the horizontal through groove, the inner end of a telescopic plate 241 penetrates through the horizontal through groove and extends into the groove 221, a sliding groove 243 is arranged on the telescopic plate 241 at the inner end, the sliding groove 243 is matched and connected with a guide pin 246 arranged in the vertical through hole 222, as shown in fig. 4, so that the inner end of the telescopic plate 241 extending into the groove 221 is fixed on the main body flat plate 22 through the guide pin 246, adjusting screws 244 with nuts 245 are respectively arranged at two sides of the sliding groove 243 at the inner end of the telescopic plate 241, two sides of the outer end of the telescopic plate 241 are respectively rotatably connected with a roller shaft 271 of the driven belt roller 27 through the inner side of a flange bearing 242, the outer side of the flange bearing 242 is rotationally connected with a corresponding shaft hole at the inner end of the transition plate 25, the outer end of the transition plate 25 is provided with a plurality of teeth 251, as shown in fig. 3, the plurality of teeth 251 are lapped in the annular groove 62 of the upper-layer conveying ring 6, so that after the control nut 245 rotates, the adjusting screw 244, the expansion plate 241 and the transition plate 25 are driven to extend out or retract, the tensioning and the deviation adjustment of the synchronous belt 23 are realized, the rod-shaped materials are smoothly transited from the upper-layer conveying ring 6 to the upper-layer conveyor 2 and are sent to the lower-layer conveyor 3 through the turning channel 4, and then the rod-shaped materials are sent to the lower-layer conveying ring 7 through the tensioning deviation adjustment mechanism 24 and the transition plate 25 with the same structure, and the turning conveying of the upper-layer conveying ring 6 and the lower-layer conveying ring 7 is realized;
the power mechanism comprises a power machine 211 and a speed regulating box 213 connected with an output shaft of the power machine 211, wherein a driving gear 215 is arranged on the output shaft of the speed regulating box 213, the driving gear 215 is engaged with a driven gear 214 above, an upper belt pulley and a lower belt pulley are respectively arranged on wheel shafts of the driving gear 215 and the driven gear 214, the upper belt pulley and the lower belt pulley are respectively connected with belt pulleys 212 and 217 on driving rollers 21 and 31 of the upper layer and the lower layer of the conveyer 2 and the lower layer of the conveyer 3 through an upper transmission belt 216 and a lower transmission belt 216, so that the driving gears 215 and 214 drive the upper belt pulley and the lower belt pulley to rotate under the driving of the power machine 211 and the speed regulating box 212, and the upper belt pulley and the lower belt pulley are respectively driven to rotate through the upper transmission belt 216 and the lower transmission belt pulley 212 and 217 to synchronously, reversely drive the driving rollers 21 and 31 of the upper layer of the lower layer of the conveyer 2 and the lower layer of the conveyer 3 to finally drive synchronous belts on the upper layer of the lower layer of the conveyer 2 and the lower layer of the conveyer 3 to move, and complete the conveying of the rod-shaped materials;
the outer sides of the upper and lower layer conveyors 2 and 3 are respectively provided with a material arranging mechanism 26, the material arranging mechanism 26 is a vertical cylinder 261 which is hollow inside and smooth outside, a cover plate 262 at the upper end of the cylinder 261 is connected with a bearing seat 269 through a vertical rod 263, the bearing seat 269 is fixed on a lower end plate 267 of the cylinder 261, the middle part of the bearing seat 269 is provided with a bearing 265 which can flexibly rotate, the inner circle of the bearing 265 is sleeved on a hollow shaft sleeve 268, the lower end of the hollow shaft sleeve 268 is connected with a vertical end 266 of an L-shaped supporting seat through a connecting pin, and a horizontal end 264 of the L-shaped supporting seat is fixed on a main body panel 22, so that in the conveying process, rodlike materials which bow outwards are arranged and reset through the following and smooth cylinder 261.
The material arranging mechanism 26 at the front side of the lower layer conveyor 3 is fixed at a corresponding position through a support rod 32 so as to arrange and return the rod-shaped materials which are headed outwards at the position.
The upper and lower layer conveyors 2, 3 can be provided with a plurality of groups in the height direction according to the requirement, and are used for being matched and connected with the upper and lower layer conveying rings 6, 7 which are arranged in a multilayer manner from top to bottom so as to meet the requirements of multilayer storage and multilayer steering conveying.
Claims (8)
1. A rod-like material layer-changing conveying device, comprising: the device comprises a back plate arranged on a cylinder body, an upper layer conveying ring and a lower layer conveying ring which are arranged on the rear side of the back plate, and is characterized in that a steering channel is arranged on the front side of the back plate, the inlet end of the steering channel is connected with the output end of an upper layer conveyor, the outlet end of the steering channel is connected with the input end of a lower layer conveyor, and the input end of the upper layer conveyor and the output end of the lower layer conveyor are respectively connected with the upper layer conveying ring and the lower layer conveying ring through corresponding tensioning and deviation adjusting mechanisms.
2. The rod-like material layer-changing conveyor according to claim 1, wherein: the outside of the steering channel is provided with an outward convex arc-shaped plate, the inside of the steering channel is provided with a flexible stopper, wherein:
the outer side of the upper end of the arc-shaped plate is fixed on the back plate through a mounting seat, and the lower end of the arc-shaped plate is connected with the input end of the lower-layer conveyor;
the upper end of the flexible stopper is hinged to two sides of the output end of the upper-layer conveyor through a hinge shaft, the lower end of the flexible stopper is suspended in the air to be in a free state, a plurality of cylinders or round rollers are connected with each other through fixed chains or fixed ropes at two ends of the flexible stopper to form a follow-up and variable chain type component, and conveyed rod-shaped materials are pressed through the follow-up and variable characteristics of the flexible stopper, so that the rod-shaped materials are smoothly steered and conveyed to the lower-layer conveyor to be stably conveyed.
3. The layer-changing conveying device for the rod-shaped materials as claimed in claim 2, wherein the flexible stopper is a flexible plate or a chain plate hinged with each other; the outside of arc inwards inclines, makes the bottom of arc form the interior low outside high slope end, and the material is in the trend of leanin when turning to passageway 4 through this, can not fall and drop outwards.
4. The rod-shaped material layer-changing conveying device according to claim 2, wherein the arc-shaped plates comprise an upper end arc-shaped plate and a lower vertical plate.
5. The layer-changing conveying device for the rod-shaped materials according to claim 2, wherein the upper and lower layer conveyors each comprise a main body flat plate, one end of the main body flat plate is provided with a driving belt roller, the other end of the main body flat plate is connected with a driven belt roller through a tensioning and deviation-adjusting mechanism, a synchronous belt is sleeved on the driving belt roller and the driven belt roller, and the driving belt roller is connected with a power mechanism.
6. The rod-like material layer-changing conveyor according to claim 3, wherein:
the tensioning and deviation-adjusting mechanism comprises a groove arranged on a main body flat plate of the upper or lower layer conveying mechanism, the groove is communicated with a horizontal through groove at the end part of the main body flat plate, a vertical through hole communicated with the horizontal through groove is arranged at the top of the horizontal through groove, the inner end of a telescopic plate penetrates through the horizontal through groove and extends into the groove, a sliding groove is arranged on the telescopic plate at the inner end and is matched and connected with a guide pin arranged in the vertical through hole, the inner end of the telescopic plate extending into the groove is fixed on the main body flat plate through the guide pin, adjusting screws with nuts are respectively arranged on two sides of the sliding groove at the inner end of the telescopic plate, two sides of the outer end of the telescopic plate are respectively connected with a roller shaft of a driven belt roller through the inner side of a flange bearing in a rotating mode, the outer side of the flange bearing is connected with a shaft hole corresponding to the inner end of a transition plate in a rotating mode, a plurality of teeth are arranged at the outer end of the transition plate and are overlapped in an annular groove of the upper layer conveying ring, so that the adjusting screw, the telescopic plate and the transition plate are driven to extend or retract after the nuts are operated to rotate, tensioning and deviation-adjusting mechanism is driven to enable rod-shaped materials to be smoothly transferred from the upper layer conveying ring to the upper layer conveying mechanism and the lower layer conveying mechanism through the same structure, and the lower layer conveying mechanism.
7. The rod-like material layer-changing conveyor according to claim 3, wherein: the outer sides of the upper and lower layer conveyors are respectively provided with a material arranging mechanism which is a vertical hollow cylinder with an inner cavity and an outer smooth cylinder, a cover plate at the upper end of the cylinder is connected with a bearing seat through a vertical rod, the bearing seat is fixed on a lower end plate of the cylinder, the middle part of the bearing seat is provided with a bearing, the inner circle of the bearing is sleeved on a hollow shaft sleeve, the lower end of the hollow shaft sleeve is connected with the vertical end of an L-shaped supporting seat through a connecting pin, the horizontal end of the L-shaped supporting seat is fixed on a main body flat plate, so that rod-shaped materials which are faked outwards are arranged and returned through follow-up and smooth cylinders in an arranging mode in the conveying process.
8. The layer-changing conveying device for the rod-shaped materials as claimed in claim 1, wherein the upper and lower layer conveyors are provided with a plurality of groups in the height direction for being matched and connected with the upper and lower layer conveying rings which are arranged in a multilayer manner from top to bottom so as to meet the requirements of multilayer storage and multilayer turning conveying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221081215.7U CN217971079U (en) | 2022-05-08 | 2022-05-08 | Bar-shaped material layer-changing conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221081215.7U CN217971079U (en) | 2022-05-08 | 2022-05-08 | Bar-shaped material layer-changing conveying device |
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| Publication Number | Publication Date |
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| CN217971079U true CN217971079U (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221081215.7U Active CN217971079U (en) | 2022-05-08 | 2022-05-08 | Bar-shaped material layer-changing conveying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159045A (en) * | 2022-05-08 | 2022-10-11 | 昆明鼎承科技有限公司 | Bar-shaped material layer-changing conveying device |
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2022
- 2022-05-08 CN CN202221081215.7U patent/CN217971079U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159045A (en) * | 2022-05-08 | 2022-10-11 | 昆明鼎承科技有限公司 | Bar-shaped material layer-changing conveying device |
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Inventor after: Ding Zhong Inventor after: Yan Yuchen Inventor after: Luo Yue Inventor after: Wang Dengsong Inventor after: Li Guolin Inventor after: Zhang Jixin Inventor after: Zhang Jun Inventor after: Yu Kun Inventor after: Wang Donghui Inventor after: Zhou Jiao Inventor before: Ding Zhong Inventor before: Yan Yuchen Inventor before: Luo Yue Inventor before: Wang Dengsong Inventor before: Li Guolin Inventor before: Zhang Jixin Inventor before: Zhang Jun Inventor before: Yu Kun Inventor before: Wang Donghui Inventor before: Zhou Jiao |