CN108373000B

CN108373000B - Categorised storage formula multilayer commodity circulation warehouse

Info

Publication number: CN108373000B
Application number: CN201810086026.0A
Authority: CN
Inventors: 谭莉莉
Original assignee: Shenzhen Xinning Modern Logistics Co ltd
Current assignee: SHENZHEN XINNING MODERN LOGISTICS Co.,Ltd.
Priority date: 2018-01-29
Filing date: 2018-01-29
Publication date: 2020-06-30
Anticipated expiration: 2038-01-29
Also published as: CN108373000A

Abstract

The invention discloses a classified storage type multilayer logistics warehouse, which comprises a fixed plate, a rotary transmission mechanism, a support base, an access passage, a placing plate and a warehouse housing, wherein the upper surface of the fixed plate is welded with the inner surface of the warehouse housing, the rotary transmission mechanism is connected with the placing plates at two ends, the bottom end of the fixed plate is welded with the support base, the rotary transmission mechanism comprises a chain transmission device, a connecting and supporting mechanism, a braking device and a conveying device, the chain transmission device is connected with the connecting and supporting mechanisms at two ends, the conveying device is embedded and arranged in the placing plates, and the braking device is meshed with the chain transmission device through a braking rotary gear. The placing speed is improved and the damage in the working process is reduced.

Description

Categorised storage formula multilayer commodity circulation warehouse

Technical Field

The invention relates to a classified storage type multilayer logistics warehouse, and belongs to the technical field of logistics warehouses.

Background

The logistics warehouse is also called logistics warehouse, namely, a self-built or leased warehouse and field are utilized to store, keep, load, unload, transport and deliver goods, the traditional warehouse definition is given from the perspective of material storage, and the modern warehouse is not the traditional warehouse and the warehouse management but the warehouse under the background of integrating the economic globalization and the supply chain.

When placing goods, the prior art needs to place higher goods shelves through mechanical handling tools such as manual control fork truck, and the dynamics of placing is not controlled well to this in-process can cause the damage to goods and placing goods shelves, wastes too much time and places the goods, causes the inconvenient and reduction of operating speed of work.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a classified storage type multilayer logistics warehouse to solve the problems that in the prior art, when goods are placed, mechanical carrying tools such as a forklift and the like need to be manually controlled to place the goods on a higher goods shelf, the goods and the goods shelf are damaged due to poor control of placing force in the process, too much time is wasted for placing the goods, inconvenience in work is caused, and the working speed is reduced.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a categorised storage formula multilayer logistics warehouse, its structure includes fixed plate, rotary transmission mechanism, support base, access way, places board, warehouse housing, the upper surface of fixed plate and the internal surface of warehouse housing weld mutually, rotary transmission mechanism is connected with the board of placing at both ends, the bottom of fixed plate welds with the support base mutually, support pedestal mounting in the inside of warehouse housing, the access way embedding is installed on the warehouse housing, rotary transmission mechanism includes chain drive, connection supporting mechanism, arresting gear, conveyer, chain drive is connected with the connection supporting mechanism at both ends, conveyer embedding is installed in the inside of placing the board, arresting gear meshes with chain drive mutually through braking rotary gear, chain drive includes protection housing, outer chain plate, chain drive is including the protection housing, outer chain plate, The roller pin shaft is embedded in and installed on the outer chain plate, the roller pin shaft is arranged on the inner chain plate, the outer chain plate is connected with the inner chain plate through the roller pin shaft, the outer surface of the first fixing shaft is attached to the inner surface of the sliding gear, the sliding gear is meshed with a middle section gap of the inner chain plate through the gear, the roller pin shaft is arranged inside the protective housing, two ends of the first fixing shaft on two sides of the top are installed on the housing of the warehouse, and the rear end of the first fixing shaft on the middle of the top is connected with the fixing plate.

Furthermore, the connection support mechanism comprises a first connection cylinder, a support shaft, a support bracket, a second connection column and a mounting plate.

Furthermore, the one end embedding of back shaft is installed in the inside of first connection cylinder, the surface of back shaft and the internal surface of support holder mutual zonulae occludens, the one end embedding of second spliced pole is installed on the support holder, the rear surface of support holder and the laminating of first connection cylinder's positive surface mutually, the one end embedding of first connection cylinder is installed on the mounting panel, the one end embedding of back shaft is installed in the inside of mounting panel.

Furthermore, the braking device comprises a control panel, a control button, a wire, a rotating shaft wheel, a fixed base, a motor junction box, a motor housing and a motor rotating shaft.

Furthermore, the control button is embedded and installed on a control panel, the right side surface of the control panel is connected with the left side surface of the warehouse housing, one end of the wire is embedded in the control panel, the control button is connected with the wire through the control panel, one end of the wire is embedded in the motor junction box, the motor junction box is arranged on the outer surface of the motor, the left end of the motor housing is connected with the right end of the motor, the lower surface of the motor housing is welded with the upper surface of the fixed base, the wire is connected with the motor through the motor junction box, the right end of the rotating shaft wheel is embedded and arranged in the motor, the lead is embedded and arranged inside the warehouse housing, the fixed base is arranged on the fixed plate, one end of the motor rotating shaft is embedded in the motor, and the rotating shaft wheel is connected with the motor rotating shaft.

Furthermore, the rotating shaft wheel comprises a brake gear, a brake gear connecting frame and a connecting shaft, wherein the inner surface of the brake gear is welded with one end of the brake gear connecting frame, one end of the connecting shaft is connected with one end of a motor rotating shaft, the brake gear is meshed with the middle section gap of the inner chain plate through a gear, and one end of the brake gear connecting frame is connected with the outer surface of the connecting shaft.

Further, conveyer includes crashproof backplate, places baffle, backup pad, conveyer, rotatory ring axle, tubular motor, conveyer belt housing.

The anti-collision protection plate comprises a support plate, a baffle, a conveying belt housing, a tubular motor, a rotating circular ring shaft, a conveying belt embedded and installed on the conveying belt housing, a conveying belt, a rectangular parallelepiped structure and a rectangular parallelepiped structure.

Advantageous effects

The invention relates to a classified storage type multilayer logistics warehouse, when goods need to be placed, the goods only need to be placed into a placing plate through an inlet and outlet channel, a tubular motor is provided with a power supply and a forward and reverse rotation device, a rotary circular shaft drives a conveying belt under the rotation action of the tubular motor, after the goods are pushed into the placing plate, the goods move backwards under the action of the conveying belt until the goods touch an anti-collision protection plate, when the placing plate is full of the goods, the tubular motor stops working, a second connecting column is directly connected with an outer chain plate in a nested manner, the placing plate is integrally arranged on a chain transmission device under the fixation of a supporting bracket and a supporting shaft, the whole connection is more compact and firm under the first connecting cylinder, the motor rotating shaft starts to operate under the operation rotation of a motor junction box and the motor under the matching action of a control button and a control panel, and a rotating shaft wheel connected with the motor rotating shaft also starts to operate, the brake gear connecting frame on the rotating shaft wheel and the brake gear start to rotate, a gap between the inner chain plate and the outer chain plate is just meshed with the brake gear, the whole chain transmission device is driven to start to operate under the contact of the brake gear and the roller pin shaft, the first fixed shaft plays a role in fixing the transmission direction of the chain transmission device in the process, the gear of the sliding gear and the gap between the inner chain plate and the outer chain plate are meshed and connected, so that the whole connecting and supporting mechanism is driven, the lifting of the placed plate is realized, and the operation is stopped when the access channel is level with the control of the placed plate every time; according to the invention, the goods can be placed easily until the warehouse is full by the modes of conveying and chain braking without mechanical carrying tools such as a forklift and the like for placing the goods, and the goods can be simply pushed into the placing plate, so that the placing speed is improved, and the damage in the working process is reduced.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of a classified storage type multi-story logistics warehouse in accordance with the present invention;

FIG. 2 is a schematic structural diagram of a rotary transmission mechanism according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic side view of a static state of a rotary transmission mechanism according to the present invention;

fig. 5 is a schematic side view of a rotation transmission mechanism according to the present invention in a working state.

In the figure: a fixed plate-1, a rotary transmission mechanism-2, a supporting base-3, an access passage-4, a placing plate-5, a warehouse housing-6, a chain transmission device-201, a connecting and supporting mechanism-202, a braking device-203, a transmission device-204, a protective housing-2011, an outer chain plate-2012, a roller pin shaft-2013, an inner chain plate-2014, a first fixed shaft-2015, a sliding gear-2016, a first connecting cylinder-2021, a supporting shaft-2022, a supporting bracket-2023, a second connecting column-2024, a mounting plate-2025, a control panel-2031, a control button-2032, a lead-2033, a rotary shaft wheel-2034, a fixed base-2035, a motor-2036, a motor junction box-2037, a motor housing-2038, a control panel-2031, a, The device comprises a motor rotating shaft-2039, a brake gear-20341, a brake gear connecting frame-20342, a connecting shaft-20343, a collision-prevention guard plate-2041, a placing baffle-2042, a supporting plate-2043, a conveying belt-2044, a rotating circular ring shaft-2045, a tubular motor-2046 and a conveying belt housing-2047.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1 to 5, the present invention provides a classified storage type multi-layer logistics warehouse: the structure of the warehouse system comprises a fixing plate 1, a rotary transmission mechanism 2, a supporting base 3, an access passage 4, a placing plate 5 and a warehouse housing 6, wherein the upper surface of the fixing plate 1 is welded with the inner surface of the warehouse housing 6, the rotary transmission mechanism 2 is connected with the placing plates 5 at two ends, the bottom end of the fixing plate 1 is welded with the supporting base 3, the supporting base 3 is installed inside the warehouse housing 6, the access passage 4 is embedded and installed on the warehouse housing 6, the rotary transmission mechanism 2 comprises a chain transmission device 201, a connecting and supporting mechanism 202, a braking device 203 and a transmission device 204, the chain transmission device 201 is connected with the connecting and supporting mechanism 202 at two ends, the transmission device 204 is embedded and installed inside the placing plate 5, the braking device 203 is meshed with the chain transmission device 201 through a braking rotary gear 20341, and the chain transmission device 201 comprises a protective housing 2011, Outer link plate 2012, roller pin shaft 2013, interior link plate 2014, first fixed axle 2015, sliding gear 2016, the inside of protection housing 2011 is equipped with outer link plate 2012, the inside of protection housing 2011 that interior link plate 2014 installed, the rear surface of outer link plate 2012 is laminated with the positive surface of interior link plate 2014, roller pin shaft 2013 embedding is installed on outer link plate 2012, be equipped with roller pin shaft 2013 on interior link plate 2014, outer link plate 2012 is connected with interior link plate 2014 through roller pin shaft 2013, the surface of first fixed axle 2015 is laminated with sliding gear 2016's internal surface mutually, sliding gear 2016 meshes through gear and interior link plate 2014 middle space mutually, the inside of protection housing 2011 is equipped with roller pin shaft 2013, the both ends of the first fixed axle 2015 in top both sides are installed on warehouse housing 2015 6, the rear end of the first fixed axle 2015 placed in the middle of top is connected with fixed plate 1, the connection supporting mechanism 202 includes a first connection cylinder 2021, a supporting shaft 2022, a supporting bracket 2023, a second connection cylinder 2024, and a mounting plate 2025, one end of the supporting shaft 2022 is embedded inside the first connection cylinder 2021, an outer surface of the supporting shaft 2022 is tightly connected to an inner surface of the supporting bracket 2023, one end of the second connection cylinder 2024 is embedded on the supporting bracket 2023, a rear surface of the supporting bracket 2023 is attached to a front surface of the first connection cylinder 2021, one end of the first connection cylinder 2021 is embedded on the mounting plate 2025, one end of the supporting shaft 2022 is embedded inside the mounting plate 2025, the braking device 203 includes a control panel 2031, a control button 2032, a wire 2033, a rotating shaft wheel 2034, a fixed base 2035, a motor 2036, a motor junction box 2037, a motor housing 2038, and a motor shaft 2039, the control button 2032 is embedded on the control panel 2031, the right side surface of the control panel 2031 is connected to the left side surface of the warehouse casing 6, one end of the wire 2033 is embedded in the control panel 2031, the control button 2032 is connected to the wire 2033 through the control panel 2031, one end of the wire 2033 is embedded in the motor terminal box 2037, the motor terminal box 2037 is installed on the outer surface of the motor 2036, the left end of the motor casing 2038 is connected to the right end of the motor 2036, the lower surface of the motor casing 2038 is welded to the upper surface of the stationary base 2035, the wire 2033 is connected to the motor 2036 through the motor terminal box 2037, the right end of the rotary shaft wheel 2034 is embedded in the motor 2036, the wire 2033 is embedded in the warehouse casing 6, the stationary base 2035 is installed on the stationary plate 1, and one end of the motor shaft 2039 is embedded in the motor 2036, the rotating shaft wheel 2034 is connected with the motor rotating shaft 2039, the rotating shaft wheel 2034 comprises a brake gear 20341, a brake gear connecting frame 20342 and a connecting shaft 20343, the inner surface of the brake gear 20341 is welded with one end of a brake gear connecting frame 20342, one end of the connecting shaft 20343 is connected with one end of the motor rotating shaft 2039, the brake gear 20341 is engaged with the middle section gap of the inner link plate 2014 through a gear, one end of the brake gear connecting frame 20342 is connected with the outer surface of the connecting shaft 20343, the transmission device 204 comprises an anti-collision guard plate 2041, a placing baffle plate 2042, a support plate 2043, a transmission belt 2044, a rotating circular ring shaft 2045, a tubular motor 2046 and a transmission belt 204case 7, the left side surface of the anti-collision guard plate 2041 is bonded with the right side surface of the support plate 2043, the right side surface of the anti-collision guard plate 2041 is connected with the left end of the placing baffle plate 2042, the placing baffle plate 204, the lower surface of anticollision backplate 2041 is connected with the upper surface of conveyer belt housing 2047, the inside in conveyer belt housing 2047 is installed in the embedding of tubular motor 2046, the surface of tubular motor 2046 is connected with the internal surface of rotatory ring axle 2045, the inside of conveyer belt housing 2047 is equipped with rotatory ring axle 2045, conveyer belt 2044 embedding is installed on conveyer belt housing 2047, the internal surface of conveyer belt 2044 closely laminates with the surface of rotatory ring axle 2045, the right flank of backup pad 2043 is connected with the left end of conveyer belt housing 2047, backup pad 2043 is the cuboid structure.

The motor is indicated by letter M in the circuit, its main function is to generate driving torque as power source of electric appliance or various machines, the generator is indicated by letter G in the circuit, its main function is to convert electric energy into mechanical energy.

When goods need to be placed, the goods only need to be placed into the placing plate 5 through the access passage 4, the tubular motor 2046 is provided with a power supply and a forward and reverse rotation device, under the rotation action of the tubular motor 2046, the rotating circular ring shaft 2045 drives the conveying belt 2044, after the goods are pushed into the placing plate 5, the goods move backwards under the action of the conveying belt 2044 until the goods touch the anti-collision protection plate 2041, when the placing plate 5 is full of the goods, the tubular motor 2046 stops working, the second connecting column 2024 is directly connected with the outer chain plate 2012 in a nested manner, under the fixing of the supporting bracket 2023 and the supporting shaft 2022, the placing plate 5 is wholly installed on the chain transmission device 201, the whole connection is more compact and firm through the first connecting column 2021, under the matching action of the control button 2 and the control panel 2031, the motor rotating shaft 2039 starts to operate through the operation rotation of the motor junction box 2037 and the motor 6, and the rotating shaft wheel 4 connected with the motor rotating shaft 2039 also starts to operate, the brake gear connecting frame 20342 on the rotating shaft wheel 2034 and the brake gear 20341 start to rotate, the gap between the inner chain plate 2014 and the outer chain plate 2012 is just meshed with the brake gear 20341, the whole chain transmission device 201 is driven to start to operate under the contact of the brake gear 20341 and the roller pin shaft 2013, in the process, the first fixing shaft 2015 plays a role in fixing the transmission direction of the chain transmission device 201, the gear of the sliding gear 2016 and the gap between the inner chain plate 2014 and the outer chain plate 2012 are meshed and connected, so that the whole connecting and supporting mechanism 202 is driven, the lifting of the placing plate 5 is realized, and the operation stop is realized only when the access passage 4 and the placing plate 5 are controlled to be level each time.

The invention solves the problems that in the prior art, when goods are placed, mechanical carrying tools such as a forklift are required to be manually controlled to place the goods on a higher goods shelf, the goods and the goods shelf are damaged due to poor control of placing force in the process, too much time is wasted for placing the goods, inconvenience in work is caused, and the working speed is reduced.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a categorised storage formula multilayer logistics warehouse, its structure includes fixed plate (1), rotary transmission mechanism (2), supports base (3), access way (4), places board (5), warehouse housing (6), the upper surface of fixed plate (1) welds with the internal surface of warehouse housing (6), rotary transmission mechanism (2) are connected with placing board (5) at both ends, the bottom and the support base (3) of fixed plate (1) weld mutually, support base (3) and install in the inside of warehouse housing (6), access way (4) embedding is installed on warehouse housing (6), its characterized in that:

the rotary transmission mechanism (2) comprises a chain transmission device (201), a connecting and supporting mechanism (202), a braking device (203) and a conveying device (204), wherein the chain transmission device (201) is connected with the connecting and supporting mechanisms (202) at two ends, the conveying device (204) is embedded in the placing plate (5), and the braking device (203) is meshed with the chain transmission device (201) through a braking rotary gear (20341);

chain drive (201) is including protection housing (2011), outer link joint (2012), roller pin axle (2013), interior link joint (2014), first fixed axle (2015), sliding gear (2016), the inside of protection housing (2011) is equipped with outer link joint (2012), the inside of protection housing (2011) that interior link joint (2014) installed, the rear surface of outer link joint (2012) and the positive surface of inner link joint (2014) are laminated mutually, roller pin axle (2013) embedding is installed on outer link joint (2012), be equipped with roller pin axle (2013) on interior link joint (2014), outer link joint (2012) are connected with interior link joint (2014) through roller pin axle (2013), the surface of first fixed axle (2015) is laminated mutually with the internal surface of sliding gear (2016), sliding gear (2016) mesh mutually through gear and interior link joint (2014) mid-section space, a roller pin shaft (2013) is arranged in the protective housing (2011), two ends of first fixing shafts (2015) on two sides of the top are installed on the warehouse housing (6), and the rear end of the first fixing shaft (2015) in the middle of the top is connected with the fixing plate (1);

the connection supporting mechanism (202) comprises a first connecting cylinder (2021), a supporting shaft (2022), a supporting bracket (2023), a second connecting column (2024) and a mounting plate (2025);

one end of the support shaft (2022) is embedded and mounted inside the first connecting cylinder (2021), the outer surface of the support shaft (2022) is tightly connected with the inner surface of the support bracket (2023), one end of the second connecting cylinder (2024) is embedded and mounted on the support bracket (2023), the rear surface of the support bracket (2023) is attached to the front surface of the first connecting cylinder (2021), one end of the first connecting cylinder (2021) is embedded and mounted on the mounting plate (2025), and one end of the support shaft (2022) is embedded and mounted inside the mounting plate (2025);

the braking device (203) comprises a control panel (2031), a control button (2032), a wire (2033), a rotating shaft wheel (2034), a fixed base (2035), a motor (2036), a motor junction box (2037), a motor housing (2038) and a motor rotating shaft (2039);

the control button (2032) is embedded in the control panel (2031), the right side of the control panel (2031) is connected with the left side of the warehouse housing (6), one end of the wire (2033) is embedded in the control panel (2031), the control button (2032) is connected with the wire (2033) through the control panel (2031), one end of the wire (2033) is embedded in the motor junction box (2037), the outer surface of the motor (2036) is provided with the motor junction box (2037), the left end of the motor housing (2038) is connected with the right end of the motor (2036), the lower surface of the motor housing (2038) is welded with the upper surface of the fixed base (2035), the wire (2033) is connected with the motor (2036) through the motor junction box (2037), the right end of the rotating shaft wheel (2034) is embedded in the motor (2036), the wire (2033) is embedded in the warehouse housing (6), the fixed base (2035) is arranged on the fixed plate (1), one end of the motor rotating shaft (2039) is embedded in the motor (2036), and the rotating shaft wheel (2034) is connected with the motor rotating shaft (2039);

the rotating shaft wheel (2034) comprises a brake gear (20341), a brake gear connecting frame (20342) and a connecting shaft (20343), wherein the inner surface of the brake gear (20341) is welded with one end of the brake gear connecting frame (20342), one end of the connecting shaft (20343) is connected with one end of a motor rotating shaft (2039), the brake gear (20341) is meshed with a middle section gap of an inner chain plate (2014) through a gear, and one end of the brake gear connecting frame (20342) is connected with the outer surface of the connecting shaft (20343);

the conveying device (204) comprises an anti-collision guard plate (2041), a placing baffle plate (2042), a supporting plate (2043), a conveying belt (2044), a rotating circular ring shaft (2045), a tubular motor (2046) and a conveying belt housing (2047);

the left side surface of the anti-collision protection plate (2041) is bonded with the right side surface of the support plate (2043), the right side surface of the anti-collision protection plate (2041) is connected with the left end of the placement baffle (2042), the placement baffle (2042) is installed on the upper surface of the conveyor belt housing (2047), the lower surface of the anti-collision protection plate (2041) is connected with the upper surface of the conveyor belt housing (2047), the tubular motor (2046) is embedded in the conveyor belt housing (2047), the outer surface of the tubular motor (2046) is connected with the inner surface of the rotating circular ring shaft (2045), the rotating circular ring shaft (2045) is arranged in the conveyor belt housing (2047), the conveyor belt (2044) is embedded in the conveyor belt housing (2047), the inner surface of the conveyor belt (2044) is tightly attached to the outer surface of the rotating circular ring shaft (2045), and the right side surface of the support plate (2043) is connected with the left end of the conveyor belt housing (2047), the supporting plate (2043) is of a cuboid structure;

when goods need to be placed, the goods only need to be placed into the placing plate (5) through the access channel (4), the tubular motor (2046) is provided with a power supply and a forward and reverse rotation device, the rotating circular ring shaft (2045) drives the conveying belt (2044) under the rotating action of the tubular motor (2046), after the goods are pushed into the placing plate (5), the goods move backwards under the action of the conveying belt (2044) until the goods touch the anti-collision protection plate (2041), when the placing plate (5) is full of the goods, the tubular motor (2046) stops working, the second connecting column (2024) is directly connected with the outer chain plate (2022012) in a nested manner, the placing plate (5) is integrally installed on the chain transmission device (201) under the fixing of the supporting bracket (2023) and the supporting shaft (2022), the whole connection is more tightly and firmly realized through the first connecting cylinder (2021), and the control button (2032) is matched with the control panel (1), the operation rotation of a motor junction box (2037) and a motor (2036) enables a motor rotating shaft (2039) to start to operate, a rotating shaft wheel (2034) connected with the motor rotating shaft (2039) also starts to operate, a brake gear connecting frame (20342) on the rotating shaft wheel (2034) and a brake gear (20341) start to rotate, a gap between an inner chain plate (2014) and an outer chain plate (2012) is just meshed with the brake gear (20341), the whole chain transmission device (201) is driven to start to operate under the contact of the brake gear (20341) and a roller pin shaft (2013), in the process, a first fixed shaft (2015) plays a role in fixing the transmission direction of the chain transmission device (201), a gear of a sliding gear (2016) is meshed with the gap between the inner chain plate (2014) and the outer chain plate (2012) so as to drive the whole connecting and supporting mechanism (202) to realize the lifting of a placing plate (5), the operation is stopped each time the access passage (4) is controlled to be level with the placing plate (5).