CN113034807A

CN113034807A - A access arrangement for commodity circulation transportation

Info

Publication number: CN113034807A
Application number: CN202110225403.6A
Authority: CN
Inventors: 张云霞
Original assignee: Individual
Current assignee: Y2T Technology Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-06-25
Anticipated expiration: 2041-03-01
Also published as: CN113034807B

Abstract

The invention belongs to the technical field of logistics access, and particularly relates to an access device for logistics transportation, which comprises a logistics container body, wherein a plurality of goods grids with different sizes are arranged on the logistics container body, each goods grid is provided with a goods door matched with the goods grid, a pull box body is arranged in each goods grid, a push-pull mechanism is arranged on the side wall of the pull box body, the push-pull mechanisms are fixedly connected with the inner wall of each goods grid, the upper end and the lower end of the pull box body are respectively provided with a goods taking opening, a first opening and closing mechanism is arranged in each goods taking opening, a goods inlet is formed in the side wall of the front end of the pull box body, and a second opening and closing. Has the advantages that: the invention can carry out friendly object taking and placing operation on the logistics container, so that the delivery is more convenient, the taking is also convenient, and in addition, the invention is more suitable for the old and part of disabled people, so that the goods can be more quickly and stably received and sent.

Description

A access arrangement for commodity circulation transportation

Technical Field

The invention belongs to the technical field of logistics access, and particularly relates to an access device for logistics transportation.

Background

The intelligent express cabinet is the new thing along with the continuous development of express industry, along with the expansion of intelligent express cabinet operation enterprise self scale, because the upper reaches enterprise technical barrier is weak, the firm is numerous, enterprise's bargaining ability will be strengthened, reduce the operation cost of enterprise, further strengthen self advantage, the development significance lies in that the express cabinet is as the access opening of community ecological circle, in case form closed loop ecological circle in the district, connect various value-added service back, user's viscidity will be strengthened, the future person will hardly break the barrier and cut into.

As the terminal part of commodity circulation link, can open the commodity circulation packing cupboard again and take out the goods through the mode of cell-phone verification after delivering now usually, but above-mentioned part has following problem when practical application:

in the actual putting process, the logistics container is usually fully paved with the container for the most space utilization, the logistics delivery personnel are not easy to place the goods in the positions of the topmost layer and the bottommost layer and place the goods in a great-force putting mode, the goods usually slide to the deepest part of the container through inertia, the goods on the topmost layer and the bottommost layer are not easy to take out when the goods are taken, and the logistics container is not easy for old people or people with defects in height and various disabled people.

To this end, we propose an access device for logistics transportation to solve the above problems.

Disclosure of Invention

The invention aims to solve the problems and provides a storing and taking device for logistics transportation, which can conveniently and quickly deliver and take goods.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a storage device for commodity circulation transportation, includes the commodity circulation packing cupboard box, be equipped with the different goods check of a plurality of sizes on the commodity circulation packing cupboard box, and every goods check all is equipped with assorted goods door with it, be equipped with the pull box in the goods check, be equipped with push-and-pull mechanism on the lateral wall of pull box, push-and-pull mechanism and the inner wall fixed connection of goods check, both ends all are equipped with the mouth of getting goods about the pull box, get and be equipped with first mechanism that opens and shuts in the mouth of getting goods, be equipped with into goods mouth on the front end lateral wall of pull box, be equipped with the second mechanism that opens and shuts in the mouth of getting.

In the above storing and taking device for logistics transportation, the push-pull mechanism comprises a cavity arranged in the side wall of the pull box body, a pull plate is connected in the cavity in a sliding manner, an embedded groove is formed in the side wall of the pull plate, a hinged telescopic arm is fixedly connected in the embedded groove, and one end of the hinged telescopic arm penetrates through a notch of the embedded groove and is fixedly connected with the inner wall of the cavity.

In the above access device for logistics transportation, a plurality of first springs are fixedly connected between the hinged telescopic arms.

In foretell access arrangement for commodity circulation transportation, the gomphosis has the battery in the pull box for the inner wall of inlet, still be equipped with a plurality of recesses on the lateral wall of pull box, it is a plurality of partly link up the setting between the recess, it is a plurality of the recess is located the upper and lower both sides of cavity branch, be equipped with the friction roller in the recess, the bottom and the recess bottom of friction roller rotate to be connected, the upper end fixedly connected with gear post of friction roller, it is a plurality of connect through gear belt transmission between the gear post, the one end of gear belt still meshes the microgenerator, microgenerator and battery electric connection, the gomphosis has a plurality of LED lamp strips on the inner wall of pull box, LED lamp strip and battery electric connection.

In foretell access arrangement for commodity circulation transportation, first mechanism that opens and shuts is including rotating the first fixture block of connecting in the getting goods mouth both sides of pull box, be equipped with first draw-in groove on the first fixture block, horizontal first kelly of fixedly connected with in the first draw-in groove, get the goods mouth and coat and have the goods sideboard of two first fixture blocks of cooperation, be equipped with a plurality of breachs on the goods sideboard, still be equipped with the third mechanism that opens and shuts in the breach, the both ends of goods sideboard all are equipped with the perforation, it is equipped with the hooked pole to alternate in the perforation, the hooked pole passes through torsion spring and is connected with the rotation of perforation inner wall, the upper end of hooked pole runs through the perforation setting, the lower extreme of hooked pole is crotch form and just with first kelly swing joint.

In foretell access arrangement for commodity circulation transportation, third opening and closing mechanism is including rotating the second fixture block of connecting on the both ends inner wall about the breach, be equipped with buckle mechanism on the second fixture block, be provided with the sheltering from the frame in the breach, fixedly connected with block in the sheltering from the frame, the both sides of sheltering from the frame all are equipped with interior notch, fixedly connected with second kelly in the interior notch, second kelly and buckle mechanism swing joint.

In foretell access arrangement for commodity circulation transportation, buckle mechanism is including setting up the second draw-in groove on the second fixture block, be equipped with on the lateral wall of second draw-in groove and accomodate the groove, accomodate fixedly connected with telescopic link on the inslot wall, the cover is equipped with the second spring on the telescopic link, the one end fixedly connected with wedge of telescopic link, the upper end fixedly connected with of wedge dials the piece, dial the piece and extend to the outside of accomodating the groove, wedge and second kelly swing joint.

In foretell access arrangement for commodity circulation transportation, the second mechanism that opens and shuts includes the metal arc piece of fixed connection on the lateral wall of inlet both ends, two the metal arc piece subtend is bloated, the bottom of inlet rotates and is connected with the opening plate, all be equipped with the wedge groove that is used for cooperating the metal arc piece on the both sides lateral wall of opening plate.

In the above access device for logistics transportation, the operation principle of the access device for logistics transportation is as follows:

1) the logistics delivery person can open the goods door of the goods grid in a conventional mode, then, after the limitation of the goods door is removed, the telescopic arm is unfolded in a small range under the action of the first spring, so that the drawing box body is partially ejected, and then, the logistics delivery person can feed goods into the drawing box body through the opening plate, or put the goods into the drawing box body from the upper part or the lower part in a mode of opening the goods fence plate or the shielding frame;

2) the side wall of the cargo railing panel can be separated from one of the first clamping blocks by shifting the hook rod, and then the cargo railing panel can axially rotate with the other first clamping block, so that the cargo railing panel can be completely opened from the upper part or the lower part of the drawing box body, or the drawing box body can be partially opened by opening and closing the shielding frame at any side to throw in the cargo;

3) the personage that has the inconvenience of health can open the back with the goods door through the conventional mode that opens and shuts, the mode through the pull box is taken it out completely from the goods check, the mode through arbitrary selection or opening and shutting goods sideboard and sheltering from the frame comes the pull box to open afterwards, thereby the goods with the deeper department of goods check smoothly is taken out, thereby need not other people's help, thereby it moves to drive a plurality of friction rollers through the reciprocal activity of pull box simultaneously, thereby bring through the gear and order about micro generator and supply power to the battery, thereby personage for having the needs provides certain illuminating effect through LED lamp strip, thereby make things convenient for the use of disabled personage more, after finishing using, can push into the pull box to the goods check and close the goods door.

Compared with the prior art, this an access arrangement for commodity circulation transportation's advantage lies in:

1. according to the invention, through the matching of the arranged drawing box body, the telescopic arm and the first spring, the effect that the drawing box body is slightly popped out of the goods lattice when a goods taker opens the goods door is achieved by utilizing the telescopic arm and the first spring, so that the goods taker can integrally pull out the drawing box body from the goods lattice, and can peel off the goods at the deepest position to the outside of the box body of the logistics container, and then take the goods, thereby facilitating the old and partial disabled persons to take the goods better to a certain extent, and simultaneously facilitating the logistics personnel to store the goods.

2. The goods barrier plate and the shielding frame are matched with the friction roller and the micro generator, so that goods can be obtained in various modes by utilizing the goods barrier plate and the shielding frame, the goods can be better matched with different goods taking requirements, meanwhile, the friction roller which runs synchronously is used for carrying out daily charging operation through the micro generator, so that light source supplement is carried out on needed personnel, and the disabled people can be better served.

Drawings

Fig. 1 is an external structure schematic diagram of an access device for logistics transportation provided by the invention;

FIG. 2 is a schematic diagram of an application structure of an access device for logistics transportation according to the present invention;

FIG. 3 is an exploded view of the drawer of FIG. 2;

FIG. 4 is an open and closed schematic view of the balustrade panel of FIG. 3;

FIG. 5 is a schematic diagram of the engagement of the bezel of FIG. 3;

FIG. 6 is a cross-sectional perspective view of the wedge block of FIG. 5;

FIG. 7 is a schematic view of the combination of the rubbing rolls of FIG. 3;

FIG. 8 is a schematic view of the engagement of the balustrade panel of FIG. 3;

fig. 9 is a partially enlarged view of a portion a in fig. 3.

In the figure, 1 logistics container body, 2 cargo grids, 3 cargo doors, 4 drawing boxes, 5 push-pull mechanisms, 6 first opening-closing mechanisms, 7 second opening-closing mechanisms, 8 drawing plates, 9 telescopic arms, 10 first springs, 11 friction rollers, 12 gear columns, 13 gear belts, 14 micro-generators, 15 LED light bars, 16 first clamping blocks, 17 first clamping grooves, 18 first clamping rods, 19 cargo barrier plates, 20 third opening-closing mechanisms, 21 hook rods, 22 second clamping blocks, 23 buckling mechanisms, 24 shielding frames, 25 blocking nets, 26 second clamping rods, 27 second clamping grooves, 28 telescopic rods, 29 second springs, 30 wedge-shaped blocks, 31 shifting blocks, 32 metal arc sheets and 33 opening plates.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

As shown in fig. 1-9, a storing and taking device for logistics transportation comprises a logistics container body 1, a plurality of goods grids 2 with different sizes are arranged on the logistics container body 1, each goods grid 3 is provided with a goods door 3 matched with the goods grid, the goods doors 3 are opened by the logistics container body 1 in a traditional mode that a mobile phone is matched with a two-dimensional code, a drawing box body 4 is arranged in each goods grid 2, the goods grids 2 have different sizes and can be matched with the goods grids for use through different sizes, a push-pull mechanism 5 is arranged on the side wall of the drawing box body 4, and the push-pull mechanism 5 is fixedly connected with the inner wall of each goods grid 2.

Push-and-pull mechanism 5 is including setting up the cavity in 4 lateral walls of pull box, sliding connection has pull board 8 in the cavity,

pull board

8 and 2 inner wall fixed connection of goods check, be equipped with the caulking groove on pull board 8's the lateral wall, the articulated flexible arm 9 of fixedly connected with in the caulking groove, the flexible mode of articulated flexible arm 9 accessible comes pull box 4 to remove and takes out, the one end of articulated flexible arm 9 run through the notch of caulking groove and with the inner wall fixed connection of cavity, go back many first springs 10 of fixedly connected with between the articulated flexible arm 9, first spring 10 initial state keeps certain fixed length, make articulated flexible arm 9 can strut by a small margin after removing the restriction.

The upper end and the lower end of the drawing box body 4 are provided with a goods taking port, a user can take or put goods through the goods taking port, a storage battery is embedded in the inner wall of the drawing box body 4 corresponding to the goods taking port, the side wall of the drawing box body 4 is also provided with a plurality of grooves, the plurality of grooves are partially arranged in a through mode, the plurality of grooves are respectively arranged on the upper side and the lower side of the cavity, friction rollers 11 are arranged in the grooves, the bottom of each friction roller 11 is rotatably connected with the bottom of each groove, the upper end of each friction roller 11 is fixedly connected with a gear column 12, the plurality of gear columns 12 are in transmission connection through a gear belt 13, the dead end of one end of each gear belt 13 is also meshed with a micro generator 14, the micro generator 14 is electrically connected with the storage battery, the reciprocating motion of the drawing box body 4 drives the plurality of friction rollers 11 to move, so that the micro generator 14 is driven to supply power to, LED lamp strip 15 and battery electric connection to personage through LED lamp strip 15 for having needs provides certain illuminating effect, thereby makes things convenient for disabled personage's use more.

The goods taking port is internally provided with a first opening and closing mechanism 6, the first opening and closing mechanism 6 comprises first clamping blocks 16 which are rotatably connected with two sides of the goods taking port of the drawing box body 4, a first clamping groove 17 is arranged on the first clamping block 16, a first clamping rod 18 is transversely and fixedly connected in the first clamping groove 17, a goods fence 19 which is matched with the two first clamping blocks 16 is covered on the goods taking port, an operator can completely open the goods taking port by opening the whole goods fence 19, a plurality of gaps are arranged on the goods fence 19, each gap is mutually independent, a third opening and closing mechanism 20 is also arranged in each gap, the third opening and closing mechanism 20 comprises second clamping blocks 22 which are rotatably connected with the inner walls of the left end and the right end of each gap, a clamping mechanism 23 is arranged on each second clamping block 22, a shielding frame 24 is arranged in each gap, each shielding frame 24 can independently open each gap, when strips or scattered goods are inconvenient to be obtained, the goods can be sequentially taken out by opening and, blocking nets 25 are fixedly connected in the shielding frame 24 and used for placing goods, inner notches are formed in two sides of the shielding frame 24 and used for clamping the second clamping blocks 22, second clamping rods 26 are fixedly connected in the inner notches, and the second clamping rods 26 are movably connected with the clamping mechanisms 23.

Buckle mechanism 23 is including setting up the second draw-in groove 27 on second fixture block 22, be equipped with on the lateral wall of second draw-in groove 27 and accomodate the groove, accomodate fixedly connected with telescopic link 28 on the inslot wall, the cover is equipped with second spring 29 on the telescopic link 28, the one end fixedly connected with wedge 30 of telescopic link 28, the upper end fixedly connected with of wedge 30 dials piece 31, dial piece 31 and extend to the outside of accomodating the groove, wedge 30 and second kelly 26 swing joint, dial piece 31 and make second kelly 26 open and shut through stirring, the both ends of goods fence board 19 all are equipped with the perforation, it is equipped with hook 21 to alternate in the perforation, hook 21 passes through torque spring and is connected with perforation inner wall rotation, the perforation setting is run through to hook 21's upper end, hook 21's lower extreme is hook-like crook and carries out the hook with first kelly 18 swing joint.

Be equipped with second mechanism 7 that opens and shuts on the front end lateral wall of pull box 4 in the mouth of delivering goods, operating personnel can lead to the mouth of delivering goods and carry out getting of goods and put, second mechanism 7 that opens and shuts includes metal arc piece 32 of fixed connection on the mouth of delivering goods both ends lateral wall, two metal arc piece 32 subtend are bloated, the bottom of mouth of delivering goods rotates and is connected with open-close plate 33, all be equipped with the wedge groove that is used for cooperating metal arc piece 32 on open-close plate 33's the both sides lateral wall, metal arc piece 32 can deform, make its and wedge groove deformation block, thereby reach the effect of open-close plate 33.

In use, the logistics delivery person can open the goods door 3 of the goods grid 2 in a conventional manner, and then after the limitation of the goods door 3 is released, the telescopic arm 9 is expanded by a small amplitude under the action of the first spring 10, so that the drawing box body 4 is ejected by a part, then the logistics delivery person can feed the goods into the drawing box body 4 through the opening plate 33, or by placing the goods from above or below into the drawer cabinet 4 by opening the cargo barrier 19 or the shutter frame 24, the hook 21 is pulled to disengage the side wall of the cargo barrier 19 from one of the first catches 16, and then the other first catch 16 causes the cargo barrier 19 to rotate axially with it, so as to achieve the effect of opening it completely from above or below the drawer cabinet 4, or the drawing box body 4 is partially opened by opening and closing the shielding frame 24 at any side to throw in the goods;

its specific application does, the personage that has the inconvenience of health can open the back with goods door 3 through the conventional mode that opens and shuts, take it out completely from goods check 2 through the mode of pull box 4, consequently come pull box 4 to open through the mode that arbitrary selection or open and shut goods sideboard 19 and shelter from frame 24, thereby the goods with the deeper department of goods check 2 that is smooth is taken out, thereby need not other people's help, thereby it moves to drive a plurality of friction rollers 11 through the reciprocal activity of pull box 4 simultaneously, thereby order about microgenerator 14 through gear belt 13 and supply power to the battery, thereby personage for having the needs provides certain illuminating effect through LED lamp strip 15, thereby make things convenient for the use of disabled personage more, after finishing using, can push into goods check 2 and close goods door 3 with pull box 4.

Although the terms of the logistics container body 1, the cargo compartment 2, the cargo door 3, the drawing box body 4, the pushing and pulling mechanism 5, the first opening and closing mechanism 6, the second opening and closing mechanism 7, the drawing plate 8, the telescopic arm 9, the first spring 10, the friction roller 11, the gear column 12, the gear belt 13, the micro-generator 14, the LED light bar 15, the first clamping block 16, the first clamping groove 17, the first clamping rod 18, the cargo barrier 19, the third opening and closing mechanism 20, the hook rod 21, the second clamping block 22, the buckling mechanism 23, the shielding frame 24, the blocking net 25, the second clamping rod 26, the second clamping groove 27, the telescopic rod 28, the second spring 29, the wedge block 30, the shifting block 31, the metal arc piece 32, the opening and closing plate 33, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a storage device for commodity circulation transportation, includes commodity circulation packing cupboard box (1), be equipped with a plurality of different sizes goods check (2) on commodity circulation packing cupboard box (1), and every goods check (3) all are equipped with assorted goods door (3) with it, its characterized in that, be equipped with pull box (4) in goods check (2), be equipped with push-and-pull mechanism (5) on the lateral wall of pull box (4), the inner wall fixed connection of push-and-pull mechanism (5) and goods check (2), both ends all are equipped with the mouth of getting goods about pull box (4), it is equipped with first mechanism (6) that opens and shuts to get in the mouth of goods, be equipped with the mouth of getting goods on the front end lateral wall of pull box (4), it is equipped with second mechanism (7) that opens and shuts to get in the mouth of goods.

2. The access device for logistics transportation according to claim 1, wherein the push-pull mechanism (5) comprises a cavity arranged in the side wall of the pull box body (4), a pull plate (8) is slidably connected in the cavity, a caulking groove is arranged on the side wall of the pull plate (8), an articulated telescopic arm (9) is fixedly connected in the caulking groove, and one end of the articulated telescopic arm (9) penetrates through the notch of the caulking groove and is fixedly connected with the inner wall of the cavity.

3. The access device for logistics transportation of claim 2, characterized in that a plurality of first springs (10) are fixedly connected between the hinged telescopic arms (9).

4. The access device for logistics transportation according to claim 2, wherein a storage battery is embedded in the inner wall of the pull box body (4) opposite to the goods inlet, a plurality of grooves are further formed in the side wall of the pull box body (4), a part of the grooves is arranged in a penetrating manner, the grooves are respectively formed in the upper side and the lower side of the cavity, a friction roller (11) is arranged in each groove, the bottom of the friction roller (11) is rotatably connected with the bottom of each groove, a gear column (12) is fixedly connected to the upper end of the friction roller (11), the gear columns (12) are in transmission connection through a gear belt (13), a micro generator (14) is further engaged at the end of one end of the gear belt (13), the micro generator (14) is electrically connected with the storage battery, a plurality of LED light bars (15) are embedded in the inner wall of the pull box body (4), the LED lamp strip (15) is electrically connected with the storage battery.

5. The access device for logistics transportation according to claim 1, wherein the first opening and closing mechanism (6) comprises a first block (16) rotatably connected to two sides of the goods access opening of the drawing box body (4), a first clamping groove (17) is arranged on the first clamping block (16), a first clamping rod (18) is transversely and fixedly connected in the first clamping groove (17), the goods taking port is covered with a goods hurdle plate (19) matched with the two first clamping blocks (16), a plurality of gaps are arranged on the goods hurdle plate (19), a third opening and closing mechanism (20) is also arranged in the gaps, both ends of the goods hurdle board (19) are provided with through holes, hook rods (21) are inserted into the through holes, the hook rod (21) is rotatably connected with the inner wall of the through hole through a torsion spring, the upper end of the hook rod (21) penetrates through the through hole, the lower end of the hook rod (21) is in a hook shape and is movably connected with the first clamping rod (18).

6. The access device for logistics transportation according to claim 5, wherein the third opening and closing mechanism (20) comprises a second clamping block (22) rotatably connected to the inner walls of the left end and the right end of the gap, a buckling mechanism (23) is arranged on the second clamping block (22), a shielding frame (24) is arranged in the gap, a blocking net (25) is fixedly connected in the shielding frame (24), inner notches are arranged on both sides of the shielding frame (24), a second clamping rod (26) is fixedly connected in each inner notch, and the second clamping rod (26) is movably connected with the buckling mechanism (23).

7. The access device for logistics transportation according to claim 6, wherein the buckle mechanism (23) comprises a second clamping groove (27) arranged on the second clamping block (22), a containing groove is formed in a side wall of the second clamping groove (27), a telescopic rod (28) is fixedly connected to the inner wall of the containing groove, a second spring (29) is sleeved on the telescopic rod (28), a wedge block (30) is fixedly connected to one end of the telescopic rod (28), a poking block (31) is fixedly connected to the upper end of the wedge block (30), the poking block (31) extends to the outside of the containing groove, and the wedge block (30) is movably connected with the second clamping rod (26).

8. The access device for logistics transportation of claim 1, wherein the second opening and closing mechanism (7) comprises metal arc sheets (32) fixedly connected to the side walls of two ends of the cargo inlet, two of the metal arc sheets (32) are oppositely bulged, the bottom of the cargo inlet is rotatably connected with an opening and closing plate (33), and wedge-shaped grooves used for being matched with the metal arc sheets (32) are formed in the side walls of two sides of the opening and closing plate (33).

9. The access device for logistics transportation of claim 1, wherein the operation principle of the access device for logistics transportation is as follows:

1) the logistics delivery person can open the goods door (3) of the goods grid (2) in a conventional mode, then, after the limitation of the goods door (3) is removed, the telescopic arm (9) is unfolded in a small range under the action of the first spring (10) so that the drawing box body (4) pops out a part, and then the logistics delivery person can feed goods into the drawing box body (4) through the opening plate (33) or put the goods into the drawing box body (4) from the upper part or the lower part in a mode of opening the goods fence (19) or the shielding frame (24);

2) the side wall of the cargo barrier plate (19) can be separated from one first clamping block (16) by pulling the hook rod (21), and then the cargo barrier plate (19) can axially rotate with the other first clamping block (16), so that the cargo barrier plate can be completely opened from the upper part or the lower part of the drawing box body (4), or the drawing box body (4) can be partially opened by opening and closing the shielding frame (24) at any side to throw in the cargo;

3) after the cargo door (3) can be opened by a person with physical disability in a conventional opening and closing way, the drawer boxes (4) are completely drawn out of the cargo compartment (2) by drawing the drawer boxes, and then the drawer boxes (4) are opened by arbitrarily selecting or opening and closing the cargo barrier (19) and the shielding frame (24), thereby smoothly taking out the goods at the deeper part of the goods grid (2) without the help of other people, meanwhile, the plurality of friction rollers (11) are driven to move through the reciprocating motion of the drawing box body (4), thereby driving a micro generator (14) to supply power to the storage battery through a gear belt (13), thereby providing certain lighting effect for people in need through the LED lamp strip (15), and being more convenient for the disabled to use, after use, the drawer housing (4) can be pushed into the cargo compartment (2) and the cargo door (3) can be closed.