CN111743313A

CN111743313A - Library uses books show shelf

Info

Publication number: CN111743313A
Application number: CN202010657775.1A
Authority: CN
Inventors: 蔡洪齐
Original assignee: Guangzhou Railway Polytechnic
Current assignee: Guangzhou Railway Polytechnic
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2020-10-09

Abstract

The invention relates to a book display rack for a library, which comprises a frame, a plurality of book placing structures, a height adjusting mechanism and a riding carrier, wherein the frame is a cuboid frame body vertically arranged along the left-right direction, the lower end of the frame is provided with a base extending left and right, the front side of the base is provided with a containing groove for containing and placing the riding carrier, the book placing structures are respectively arranged between the left side plate and the right side plate of the frame along the left-right direction and are distributed at intervals up and down, the left side plate and the right side plate of the frame are respectively provided with the height adjusting mechanism which is connected with the two ends of each book placing structure in a one-to-one correspondence manner, and the height adjusting mechanism is. The advantages are that: structural design is simple, reasonable, conveniently adjusts the height that two adjacent books placed the structure according to books size to books are placed smoothly, simultaneously, take the carrier and be convenient for the look up personnel to take, and accomodate the convenience, do not occupy additional space volume.

Description

Library uses books show shelf

Technical Field

The invention relates to a library appliance, in particular to a book display rack for a library.

Background

Library, be the collection, the arrangement, collect books data for the people read, the mechanism of reference, in order to make more knowledge of the better study of student and mr at school, library can be established usually, in library, look for books in order to make the user more convenient, consequently, can use the show shelf to demonstrate books, putting the in-process, because two distances of carrying between the thing board are fixed from top to bottom, when books size is great, can not place on carrying the thing board, there is certain limitation, some teachers and students take the book back from the show shelf in addition, like directly sitting on the ground and watch, or stand for a long time and look up, the comfort level when leading to looking up reduces.

Disclosure of Invention

The invention aims to provide a book showing stand for a library, which effectively overcomes the defects of the prior art.

The technical scheme for solving the technical problems is as follows:

the utility model provides a structure is placed to a plurality of books for library, which comprises a frame, height adjusting mechanism and the carrier of taking, above-mentioned frame is the rectangular size framework of the vertical setting of direction about along, the base that extends about its lower extreme is equipped with, above-mentioned base front side is equipped with and is used for accomodating the holding tank of placing the carrier of the aforesaid, a plurality of above-mentioned books are placed the structure and are set up between the left and right sides curb plate of above-mentioned frame along direction about respectively, and upper and lower interval distribution, be equipped with the above-mentioned height adjusting mechanism who is connected with every above-mentioned books placement structure both ends one-to-one on the curb plate of the left and right sides of above-mentioned frame respectively, above-mentioned height.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, above-mentioned books place the structure including carrying thing board and a plurality of baffle, above-mentioned year thing board is along left right direction level setting, its both ends are connected with above-mentioned height adjustment mechanism who corresponds respectively, a plurality of above-mentioned baffles are all along the vertical setting of fore-and-aft direction, and control the spaced upper end that is fixed in above-mentioned year thing board, a plurality of baffles of fixedly connected with between the rear end of the both sides curb plate about the frame, a plurality of above-mentioned baffles all set up along left right direction, and interval distribution from top to bottom, and set up with a plurality of above-mentioned year thing board one-to-ones, every above-mentioned baffle is located the rear side of the baffle on the above.

Further, the height adjusting mechanism comprises a mounting rack, an upper screw and a lower screw, movable hole sites corresponding to two ends of each book placing structure are vertically arranged on the left side plate and the right side plate of the frame respectively, the two ends of the book placing structure are respectively and horizontally provided with a movable plate, the movable plates respectively pass through the corresponding movable hole positions, the mounting frames are respectively arranged on the outer sides of the side plates on the corresponding sides of the frame, and corresponding to the position of the movable hole, the upper end and the lower end of the mounting rack are respectively provided with a threaded hole matched with the upper screw rod and the lower screw rod in a penetrating way, the upper screw rod and the lower screw rod are respectively vertically arranged and are in threaded connection with the corresponding threaded holes, and the two ends close to each other are respectively provided with a clamping plate, and the movable plate passes through the movable hole position, and the movable plate is detachably clamped between the two corresponding clamping plates.

Furthermore, the handle rocker for driving the upper screw rod and the lower screw rod is respectively installed at one end, far away from each other, of the upper screw rod and the lower screw rod.

Furthermore, a guide rod is vertically fixed in the movable hole site, and the guide rod penetrates through the corresponding movable plate in the movable hole site and can move up and down relatively.

Further, the riding carrier comprises a seat body, a lifting mechanism and a bearing plate, wherein a groove is formed in the upper end of the seat body, the lifting mechanism is installed on the bottom of the groove, the bearing plate is horizontally installed at the upper end of the lifting mechanism and is in transmission connection with the lifting mechanism, and the lifting mechanism is used for driving the bearing plate to move up and down, extend above the groove or retract into the groove.

Further, the lifting mechanism comprises a pipe seat with an internal thread and a supporting screw rod, the pipe seat is vertically fixed in the middle of the bottom of the groove, the supporting screw rod is vertically arranged, the lower end of the supporting screw rod extends into the pipe seat from top to bottom and is connected with the pipe seat in a screwing mode, and the upper end of the supporting screw rod is fixedly connected with the middle of the lower end of the bearing plate.

Further, an assembly groove is formed in the bottom of the accommodating groove, a front rail and a rear rail are arranged in the assembly groove, a sliding block which is in sliding fit with the rails is arranged at the rear end of the lower end of the seat body, a cover plate is arranged at the front end of the seat body, a plurality of traveling wheel sets which are supported on the ground are arranged at the lower end of the cover plate, and the seat body and the cover plate can move backwards along the rails under the action of external force until the cover plate covers the front end opening of the accommodating groove or move forwards until the bearing plate completely exposes out of the front of the base.

The locking structure is arranged at the position, corresponding to the cover plate, of the front end of the base and used for being locked and fixed with the cover plate when the cover plate moves backwards to the position, which covers the opening of the front end of the accommodating groove, of the cover plate.

Further, the locking structure comprises a pressing tongue, a pressing rod piece and an elastic piece, wherein an assembly hole is formed in the front end of the base corresponding to the middle area of the upper portion of the cover plate, the pressing tongue is arranged in the assembly hole in the front-back direction, a hole position communicated with the assembly hole is vertically formed in the upper end of the base corresponding to the assembly hole, the pressing rod piece vertically penetrates through the hole position, the lower end of the pressing rod piece is fixedly connected with the pressing tongue, the elastic piece is connected between the pressing tongue and the top wall of the assembly hole, a locking hook protruding out of the front end of the assembly hole is arranged at the front end of the pressing tongue, the upper portion of the locking hook is an inclined surface extending obliquely upwards towards the rear side, a locking hole is formed in the middle area of the rear side of the upper portion of the cover plate corresponding to the position of the locking hook, a locking groove is formed in the front side of the top of the pressing, the upper edge of the lock hole slides over the upper inclined surface of the lock hook, the lock hook and the rod pressing piece are downwards extruded, the elastic piece stretches, and after the lock hook completely stretches into the rear side of the lock hole, the elastic piece restores to the original state and upwards drives the pressing tongue, the rod pressing piece and the lock hook to return, so that the lock hook upwards stretches into the lock groove.

The invention has the beneficial effects that: structural design is simple, reasonable, conveniently adjusts the height that two adjacent books placed the structure according to books size to books are placed smoothly, simultaneously, take the carrier and be convenient for the look up personnel to take, and accomodate the convenience, do not occupy additional space volume.

Drawings

FIG. 1 is a front view of a book shelf for a library according to the present invention;

FIG. 2 is a schematic side view of a book shelf for a library according to the present invention;

FIG. 3 is a schematic structural view of a height adjustment mechanism in a book shelf for a library according to the present invention;

FIG. 4 is a schematic structural view of a seat of the book shelf for a library of the present invention after being received in the receiving groove and locked;

fig. 5 is an enlarged view of a portion a of fig. 4.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the book shelf comprises a frame, 2, a baffle, 3, a book placing structure, 4, a height adjusting mechanism, 5, a riding carrier, 11, a base, 12, a movable hole position, 31, a carrying plate, 32, a partition plate, 33, a movable plate, 41, a mounting frame, 42, an upper screw rod, 43, a lower screw rod, 44, a clamping plate, 45, a handle rocker, 51, a seat body, 52, a lifting mechanism, 53, a bearing plate, 54, a cover plate, 55, a travelling wheel group, 61, a pressing tongue, 62, a pressing rod piece, 63, an elastic piece, 121, a guide rod, 511, a sliding block, 521, a pipe seat, 522, a supporting screw rod, 531, a holding rod, 532, a cushion, 541, a pull ring, 542 and a lock hole.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example (b): as shown in fig. 1 and 2, the library book display shelf of the present embodiment includes a frame 1, a plurality of book placement structures 3, a height adjustment mechanism 4, and a carrier 5, wherein the frame 1 is a rectangular frame vertically disposed along a left-right direction, a base 11 extending left and right is disposed at a lower end of the frame, a receiving groove for receiving the carrier 5 is disposed at a front side of the base 11, the book placement structures 3 are respectively disposed between left and right side plates of the frame 1 along the left-right direction and are vertically spaced apart from each other, the height adjustment mechanism 4 connected to two ends of each book placement structure 3 in a one-to-one correspondence is disposed on each of the left and right side plates of the frame 1, and the height adjustment mechanism 4 is used for adjusting an up-down height of the corresponding book placement structure 3.

In the use, put books in every books placement structure 3, the height adjustment mechanism 4 through every books placement structure 3 both ends adjusts books placement structure 3's height (also be exactly adjust two adjacent books placement structure 3's relative distance), thereby ensure that books can be smooth put in every books placement structure 3, and simultaneously, the in-process is looked up to teachers and students, can pull out from the holding tank of base 11 with taking carrier 5, sit and look up on it, improve the travelling comfort, when not needing to use and take carrier 5, take carrier 5 and accomodate into the holding tank, can not occupy extra space volume.

Above-mentioned holding tank can set up a plurality ofly to locate 11 front ends of base along left right direction interval, carrier 5 is taken to one of equal adaptation in corresponding every holding tank, can satisfy many people and take the demand of looking up.

As a preferred embodiment, the book placing structure 3 includes an object carrying plate 31 and a plurality of partition plates 32, the object carrying plate 31 is horizontally disposed along a left-right direction, two ends of the object carrying plate 31 are respectively connected to the corresponding height adjusting mechanisms 4, the plurality of partition plates 32 are vertically disposed along a front-back direction and are fixed to an upper end of the object carrying plate 31 at left-right intervals, a plurality of baffle plates 2 are fixedly connected between rear ends of left-right side plates of the frame 1, the plurality of baffle plates 2 are disposed along a left-right direction and are vertically spaced and are disposed in one-to-one correspondence with the plurality of object carrying plates 31, and each baffle plate 2 is respectively located at a rear side of the partition plate 32 on the corresponding object carrying plate 31.

In the embodiment, the book placing structure 3 is simple in design, books are placed left and right against the partition plates 32, the rear of each book is limited through the baffle 2, the books are prevented from falling from the rear, and the books can be conveniently and quickly placed and taken through the whole structure design.

Preferably, the number of the baffle plates 2 and the number of the carrying plates 3 are three, and the number of the baffle plates 2 can be selected according to the size of the actual display shelf and the size of the books.

As a preferred embodiment, as shown in fig. 3, the height adjusting mechanism 4 includes a mounting frame 41, an upper screw 42 and a lower screw 43, wherein the left and right side plates of the frame 1 are respectively vertically provided with a movable hole 12 corresponding to two ends of each book placing structure 3, two ends of each book placing structure 3 are respectively horizontally provided with a movable plate 33, the movable plates 33 respectively penetrate through the corresponding movable hole 12, the mounting frame 41 is respectively mounted at the outer side of the side plate of the corresponding side of the frame 1 and corresponds to the position of the movable hole 12, the upper and lower ends of the mounting frame 41 are respectively provided with a threaded hole matching with the upper screw 42 and the lower screw 43, the upper screw 42 and the lower screw 43 are respectively vertically provided and threadedly connected to the corresponding threaded hole, and the adjacent ends of the upper screw 42 and the lower screw 43 are respectively provided with a clamping plate 44, one end of the movable plate 33 passing through the movable hole 12 is detachably clamped between two corresponding clamping plates 44.

In this embodiment, in the adjustment process, if the height of the book placing structure 3 needs to be adjusted upwards, the upper screw 42 is screwed to move the whole body upwards, the lower screw 43 is screwed to move the whole body upwards, and the upper screw 42 and the lower screw 43 are finely adjusted and screwed until the book placing structure 3 is adjusted to a proper height, so that the movable plate 33 is clamped and fixed by the frame plates 44 of the two screws, that is, the book placing structure 3 is clamped and fixed, so that the current position of the book placing structure 3 is kept.

As a preferred embodiment, the ends of the upper screw rod 42 and the lower screw rod 43, which are far away from each other, are respectively provided with a handle rocker 45 for driving the same, and the screwing of the upper screw rod 42 and the lower screw rod 43 is only required to apply external force through the corresponding handle rockers 45, so that the operation is very convenient.

In a preferred embodiment, a guide rod 121 is vertically fixed in the movable hole 12, and the guide rod 121 penetrates through the movable plate 33 in the corresponding movable hole 12 and can move up and down relatively.

In this embodiment, the design of the guide rod 121 can avoid the bad phenomenon that the movable handle 33 tilts and rocks when adjusting the height up and down, ensure that the book placing structure 3 stably ascends and descends, avoid the situation of tilting and tipping, and ensure that the books placed therein do not fall down in the adjusting process.

As a preferred embodiment, as shown in fig. 4, the riding carrier 5 comprises a base body 51, a lifting mechanism 52 and a bearing plate 53, wherein a recess is formed at an upper end of the base body 51, the lifting mechanism 52 is installed on a bottom of the recess, the bearing plate 53 is horizontally installed at an upper end of the lifting mechanism 52 and is in transmission connection with the lifting mechanism 52, and the lifting mechanism 52 is used for driving the bearing plate 53 to move up and down, extend above the recess, or retract into the recess.

In this embodiment, when the user needs to sit and look up, the whole carrier 5 is pulled out of the corresponding accommodating groove, the bearing plate 53 is completely exposed out of the front of the accommodating groove, and then the lifting mechanism 52 adjusts the level of the bearing plate 53 to be raised to be higher than the upper end of the seat body 51 or to be flush with the upper end of the seat body 51, so that the user can sit on the bearing plate 53 for looking up books without worry.

The upper surface of the bearing plate 53 is provided with a cushion 532, and the cushion 532 is made of soft cloth or a spongy cushion, so that the riding comfort is improved.

In a preferred embodiment, the lifting mechanism 52 includes a socket 521 having an internal thread and a support screw 522, the socket 521 is vertically fixed at the middle of the bottom of the recess, the support screw 522 is vertically disposed, the lower end of the support screw extends into the socket 521 from the top to the bottom, and the two are screwed together, and the upper end of the support screw 522 is fixedly connected to the middle of the lower end of the bearing plate 53.

Specifically, when the height of the bearing plate 53 is adjusted, the external force rotates the bearing plate 53 and drives the supporting screw 522 to rotate simultaneously, and in the rotating process, the supporting screw 522 is displaced upwards or downwards, so that the height of the bearing plate 53 is changed, and the whole operation process is simple and convenient.

More specifically, the groove is a circular groove, the bearing plate 53 is a circular plate coaxially disposed with the groove, a grip bar 531 for rotating the bearing plate by external force is disposed on the outer circumference of the bearing plate, and in the adjusting process, the bearing plate 53 is driven to rotate by external force exerted by the grip bar 531, which is convenient to operate.

The two grip bars 531 may be disposed and distributed on opposite sides of the outer circumference of the bearing plate 53, and may be operated and rotated by being held by both hands.

Of course, the lifting mechanism 52 may be an electrically controlled lifting mechanism (e.g., a screw pair) with a power storage and a switch to realize one-touch operation, but the cost is higher than that of a mechanical structure.

As a preferred embodiment, as shown in fig. 4, an assembly groove is opened on the bottom of the receiving groove, a rail is arranged in the assembly groove, the rail is arranged in front of and behind the assembly groove, a sliding block 511 which is in sliding fit with the rail is arranged at the rear end of the lower end of the base body 51, a cover plate 54 is arranged at the front end of the base body 51, a plurality of traveling wheel sets 55 supported on the ground are arranged at the lower end of the cover plate 54, and the base body 51 and the cover plate 54 can move backwards along the rail under the action of external force until the cover plate 54 covers the front end opening of the receiving groove or move forwards until the bearing plate 53 is completely exposed out of the front of the base 11.

In this embodiment, can not break away from the holding tank completely when whole carrier 5 of taking uses, it is accomodate and use more convenient, avoids taking its whole teachers and students not accomodate back to the holding tank that corresponds according to the regulation in, and the arrangement is accomodate to whole design convenience logistics management personnel, can not appear taking carrier 5 and use the situation of piling up in disorder and disturbing logistics management after using.

In a preferred embodiment, a pull ring 541 for pulling the cover plate 54 to move forward and backward is provided on the front side of the cover plate.

In this embodiment, the user can pull or push the pull ring 541 by hand to act on the seating carrier 5 through the cover plate 54, so that the seating carrier is pushed/pulled out of the housing groove for use or storage, which is convenient for operation.

As a preferable embodiment, as shown in fig. 4, the base further comprises a locking structure, which is arranged at a position corresponding to the cover plate 54 at the front end of the base 1, and is used for locking and fixing with the cover plate 54 when the cover plate 54 moves backwards to cover the front end opening of the accommodating groove.

In this embodiment, when the riding carrier 5 is not used, it can be pushed into the corresponding receiving slot completely and locked by the cover plate 54 and the locking structure, so that it will not occupy extra space volume in the waiting state and keep a stable receiving state.

As a preferred embodiment, as shown in fig. 5, the locking structure includes a tongue 61, a rod 62 and an elastic member 63, a mounting hole is formed at a position corresponding to a middle area of an upper portion of the cover plate 54 at a front end of the base 1, the tongue 61 is disposed in the mounting hole in a front-rear direction, a hole communicated with the mounting hole is vertically formed at a position corresponding to the mounting hole at an upper end of the base 1, the rod 62 vertically penetrates through the hole and is fixedly connected to the tongue 61 at a lower end thereof, the elastic member 63 is connected between the tongue 61 and a top wall of the mounting hole, a locking hook protruding forward of the mounting hole is disposed at a front end of the tongue 61, an upper portion of the locking hook is an inclined surface extending obliquely upward toward a rear side, a locking hole 542 is formed at a middle area of a rear side of an upper portion of the cover plate 54 corresponding to a position of the locking hook, a front side of a top portion of the locking hole 542 is recessed, when the cover plate 54 moves backward to cover the front opening of the accommodating groove, the upper edge of the locking hole 542 slides over the upper inclined surface of the locking hook and presses the locking hook and the pressing rod member 62 downward, the elastic member 63 stretches, and when the locking hook completely extends into the rear side of the locking hole 542, the elastic member 63 returns to the original state and drives the pressing tongue 61, the pressing rod member 62 and the locking hook to return, so that the locking hook extends upward into the locking groove.

In this embodiment, when the carrier 5 needs to be used, the pressing rod 62 is pressed downward to drive the pressing tongue 61 to move downward until the locking hook is withdrawn downward from the locking groove into the locking hole 542, in this state, the cover plate 54 is pulled forward to make the locking hook be disengaged from the locking hole 542, so that the carrier 5 is pulled out of the accommodating groove for use, after use, the cover plate 54 is pushed backward to make the carrier 5 move backward along the track, when the cover plate 54 moves to contact the locking hook, the upper edge of the locking hole slides over the upper inclined plane of the locking hook, and forces the locking hook, the pressing tongue 61 and the pressing rod 62 to move downward until the locking hook moves to the position below the corresponding locking groove, the locking hook has no structural compression limitation, the elastic member 63 resumes initial loading and drives the pressing tongue 61 and the locking hook to move upward, the locking hook can hook catch the rear side wall of the locking groove, i.e. the cover plate 54 and the locking rod 11 are locked and matched, and, the unlocking and locking actions can be realized by pressing and pushing and pulling, and the operation is simple and convenient.

Specifically, the elastic member 63 is a spring, which is stable in use, can be provided with a plurality of elastic members, and is uniformly arranged around the pressing bar member 62 at intervals.

The pressing rod piece 62 is a vertical rod body, and the upper end of the pressing rod piece can be provided with a pressing surface with a large area, so that the pressing operation is convenient.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a library uses books show shelf which characterized in that: including frame (1), a plurality of books place structure (3), height control mechanism (4) and take carrier (5), frame (1) is for following the rectangular size framework of the vertical setting of left right direction, and base (11) that extend about its lower extreme is equipped with, base (11) front side is equipped with and is used for accomodating and places take the holding tank of carrier (5), and is a plurality of books place structure (3) respectively along left right direction set up in between the left and right sides curb plate of frame (1), and interval distribution from top to bottom, be equipped with respectively on the left and right sides curb plate of frame (1) with every books place structure (3) both ends one-to-one connection height control mechanism (4), height control mechanism (4) are used for adjusting the correspondence the upper and lower height of books place structure (3).

2. A book display shelf for a library as claimed in claim 1, wherein: book placement structure (3) is including carrying thing board (31) and a plurality of baffle (32), carry thing board (31) and set up along left right direction level, its both ends respectively with correspond altitude mixture control mechanism (4) are connected, and are a plurality of baffle (32) all follow the vertical setting of fore-and-aft direction to control spaced being fixed in carry the upper end of thing board (31), a plurality of baffles (2) of fixedly connected with between the rear end of frame (1) left and right sides curb plate, it is a plurality of baffle (2) all set up along left right direction, and interval distribution from top to bottom, and with a plurality of carry thing board (31) one-to-one setting, every baffle (2) are located the correspondence respectively carry the rear side of baffle (32) on thing board (31).

3. A book display shelf for a library as claimed in claim 1, wherein: the height adjusting mechanism (4) comprises an installation frame (41), an upper screw rod (42) and a lower screw rod (43), movable hole sites (12) corresponding to the two ends of the book placing structure (3) are vertically opened on side plates on the left side and the right side of the frame (1) respectively, movable plates (33) are horizontally arranged at the two ends of the book placing structure (3) respectively, the movable plates (33) respectively penetrate through the corresponding movable hole sites (12), the installation frame (41) is installed on the outer sides of the side plates on the corresponding side of the frame (1) respectively and corresponds to the positions of the movable hole sites (12), threaded holes matched with the upper screw rod (42) and the lower screw rod (43) are respectively arranged at the upper end and the lower end of the installation frame (41) in a penetrating manner, the upper screw rod (42) and the lower screw rod (43) are respectively vertically arranged and are in the corresponding threaded, and one ends of the movable plates (33) which are close to each other are respectively provided with a clamping plate (44), and one ends of the movable plates (33) which penetrate through the movable hole positions (12) are respectively detachably clamped between the two corresponding clamping plates (44).

4. A book display shelf for a library as claimed in claim 3, wherein: and one ends of the upper screw rod (42) and the lower screw rod (43), which are far away from each other, are respectively provided with a handle rocker (45) for driving the upper screw rod and the lower screw rod.

5. A book display shelf for a library as claimed in claim 3, wherein: and guide rods (121) are vertically fixed in the movable hole sites (12), and the guide rods (121) penetrate through the corresponding movable plates (33) in the movable hole sites (12) and can move up and down relatively.

6. A book display shelf for a library according to any one of claims 1 to 5, wherein: the riding carrier (5) comprises a base body (51), a lifting mechanism (52) and a bearing plate (53), a groove is formed in the upper end of the base body (51), the lifting mechanism (52) is installed on the bottom of the groove, the bearing plate (53) is horizontally installed at the upper end of the lifting mechanism (52) and is in transmission connection with the lifting mechanism (52), and the lifting mechanism (52) is used for driving the bearing plate (53) to move up and down, extend to the upper portion of the groove or retract into the groove.

7. A book display shelf for a library as claimed in claim 6, wherein: the lifting mechanism (52) comprises a pipe seat (521) with an internal thread and a supporting screw rod (522), the pipe seat (521) is vertically fixed in the middle of the bottom of the groove, the supporting screw rod (522) is vertically arranged, the lower end of the supporting screw rod extends into the pipe seat (521) from top to bottom, the pipe seat and the supporting screw rod are connected in a screwing mode, and the upper end of the supporting screw rod (522) is fixedly connected with the middle of the lower end of the bearing plate (53).

8. A book display shelf for a library as claimed in claim 6, wherein: open on the tank bottom of holding tank has the assembly groove, the track that sets up around being equipped with in the assembly groove, the rear end of pedestal (51) lower extreme be equipped with track sliding fit's slider (511), the front end of pedestal (51) is equipped with apron (54), the lower extreme of apron (54) is equipped with multiunit and supports walking wheelset (55) in ground, pedestal (51) and apron (54) can follow under the exogenic action the track moves backward extremely apron (54) cover the front end of holding tank is uncovered, or move forward extremely bearing plate (53) expose completely the place ahead of base (11).

9. A book display shelf for a library as claimed in claim 8, wherein: the locking structure is arranged at the position, corresponding to the cover plate (54), of the front end of the base (1) and used for locking and fixing the cover plate (54) when the cover plate (54) moves backwards to the position, covering the front end opening of the accommodating groove, of the base.

10. A book display shelf for a library as claimed in claim 9, wherein: the locking structure comprises a pressing tongue (61), a pressing rod piece (62) and an elastic piece (63), wherein an assembly hole is formed in the position, corresponding to the middle area of the upper portion of the cover plate (54), of the front end of the base (1), the pressing tongue (61) is arranged in the assembly hole in the front-back direction, a hole position communicated with the assembly hole is vertically formed in the position, corresponding to the assembly hole, of the upper end of the base (1), the pressing rod piece (62) vertically penetrates through the hole position, the lower end of the pressing tongue (61) is fixedly connected with the pressing tongue, the elastic piece (63) is connected between the pressing tongue (61) and the top wall of the assembly hole, a locking hook protruding out of the front portion of the assembly hole is arranged at the front end of the pressing tongue (61), the upper portion of the locking hook is an inclined surface extending obliquely towards the upper portion of the rear side, a locking hole (542) is formed in the position, corresponding to the, lockhole (542) top front side is to upwards concavely being equipped with the locked groove, works as apron (54) backward move to cover the open in-process of front end of holding tank, lockhole (542) are gone up along sliding the upper portion inclined plane of latch hook to the downward extrusion latch hook and presser bar piece (62), elastic component (63) are tensile, and after the latch hook stretched into completely lockhole (542) rear side, elastic component (63) resume initial state, and upwards drive presser tongue (61), presser bar piece (62) and latch hook return, thereby make the latch hook upwards stretch into in the locked groove.