CN210029629U

CN210029629U - Safety fixing device of coiled material winding and unwinding frame

Info

Publication number: CN210029629U
Application number: CN201920789498.2U
Authority: CN
Inventors: 张慧; 章琛; 章恒
Original assignee: Anhui Rongyou New Material Technology Co Ltd
Current assignee: Anhui Rongyou New Material Technology Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-07
Anticipated expiration: 2029-05-28

Abstract

The utility model relates to the field of coiled material winding and unwinding frames, in particular to a safe fixing device of a coiled material winding and unwinding frame, which comprises a base, a first adjusting mechanism and a second adjusting mechanism, wherein the base is provided with a frame which is fixedly arranged on the base, a baffle plate is arranged at the center of the inner part of the frame, lifting plates are arranged at the two sides of the baffle plate, the first adjusting mechanism and the second adjusting mechanism are respectively arranged at the two sides of the baffle plate, the first adjusting mechanism and the second adjusting mechanism have the same structure, the first adjusting mechanism and the second adjusting mechanism respectively comprise a longitudinal adjusting component and two lifting components, the two lifting components are symmetrically arranged at the two sides of the frame, the longitudinal adjusting component is arranged at the top of the lifting plates, a mounting plate for fixing the winding and unwinding frame is arranged above the longitudinal adjusting component, the bottom of the mounting plate is fixedly connected with the working end of the longitudinal adjusting component, and the height and the longitudinal direction can be adjusted, and the stability of the coiled material collecting and releasing frame when the coiled material is collected and released is improved.

Description

Safety fixing device of coiled material winding and unwinding frame

Technical Field

The utility model relates to a coiled material receive and releases frame field, concretely relates to coiled material receive and releases safe fixing device of frame.

Background

The labels are various in types, along with the development of economy, the demand for the labels is more and more, the manufacturing process for manufacturing the labels is relatively more, in the manufacturing process, the labels need to be received and discharged aiming at label substrates, a common receiving and discharging frame is composed of a receiving frame and a discharging frame, the receiving frame and the discharging frame are fixed and cannot be adjusted during installation, when the receiving and discharging frame receives and discharges the labels, the arrangement positions of the receiving frame and the discharging frame need to be adjusted consistently, the heights of the receiving frame and the discharging frame need to reach standard heights respectively, after long-time processing, the existing coiled material receiving and discharging frame inevitably shifts, the arrangement positions of the receiving frame and the discharging frame are inconsistent, when the receiving and discharging are carried out, the coiled materials deviate during receiving and discharging, and the coiled materials are seriously damaged, therefore, a safe fixing device for the coiled material receiving and discharging frame is provided, in order to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coiled material receive and releases safe fixing device of frame, this equipment can be fixed with receiving and releasing the frame to can height-adjusting and longitudinal direction, improve the coiled material receive and release the stability of frame when receiving and releasing the coiled material.

To achieve the purpose, the utility model adopts the following technical proposal:

provides a safe fixing device of a coiled material collecting and releasing frame, which comprises a base, a first adjusting mechanism and a second adjusting mechanism, the base is provided with a frame, the frame is fixedly arranged on the base, a partition plate is arranged at the center of the interior of the frame, lifting plates are arranged on two sides of the partition plate, a first adjusting mechanism and a second adjusting mechanism are respectively arranged on two sides of the partition plate, the first adjusting mechanism and the second adjusting mechanism are identical in structure and respectively comprise a longitudinal adjusting assembly and two lifting assemblies, the two lifting assemblies are symmetrically arranged on two sides of the frame, and the working ends of the two lifting components are respectively fixedly connected with the two sides of the lifting plate, the longitudinal adjusting component is positioned at the top of the lifting plate, a mounting plate for fixing the retractable frame is arranged above the longitudinal adjusting component, and the bottom of the mounting plate is fixedly connected with the working ends of the longitudinal adjusting component.

Preferably, each lifting component comprises a lifting frame, a first threaded rod, a first handle and a first locking nut, the lifting frame is vertically and fixedly installed on the side wall of the frame, the top and the bottom of the lifting frame are respectively provided with a first bearing, the first threaded rod is vertically arranged inside the lifting frame, the first threaded rod is provided with a lifting guide block, the lifting guide block is provided with a first threaded hole for the threaded connection of the first threaded rod, one end of the lifting guide block is fixedly connected with the side wall of the lifting plate, the frame is provided with a rectangular notch for avoiding the movement of the lifting guide block, the top end and the bottom end of the first threaded rod are respectively rotatably inserted into the inner ring of the first bearing, the bottom end of the first threaded rod can rotatably penetrate through one of the first bearings and extend downwards, the first locking nut is positioned at the extending end of the first threaded rod, the first handle is horizontally arranged at the extending end of the first threaded rod, the first handle is fixedly connected with the extending end of the first threaded rod.

Preferably, every the both sides of lift guide block are equipped with first slider respectively, are equipped with respectively on the lift frame to be used for supplying the gliding first spout of every first slider, and the both sides of first threaded rod are equipped with first guide bar respectively, and every first guide bar all is vertical setting, the both ends of every first guide bar respectively with the inner wall fixed connection of lift frame, be equipped with the first direction mouth that is used for dodging every first guide bar on the lift guide block respectively.

Preferably, each longitudinal adjusting mechanism comprises a longitudinal moving frame and a second threaded rod, second handle and second lock nut, the longitudinal movement frame is horizontal fixed mounting at the top of lifter plate, the both sides of longitudinal movement frame are equipped with the second bearing, the second threaded rod is the level and sets up the inside at the longitudinal movement frame, the both ends of second threaded rod can the pivoted insert the inner circle of locating every second bearing respectively, be equipped with vertical guide block on the second threaded rod, be equipped with on the vertical guide block and be used for supplying second threaded rod threaded connection second screw hole, the top of vertical guide block and the bottom fixed connection of mounting panel, the one end of second threaded rod can the pivoted pass the outer extension of the inner circle of one of them second bearing, second lock nut is located the extension end of second threaded rod, the second handle is the extension end of vertical setting at the second threaded rod, the extension end fixed connection of second handle and second threaded rod.

Preferably, each of the two sides of the longitudinal guide block is provided with a second slider respectively, the longitudinal moving frame is provided with a second sliding chute for allowing each second slider to slide, the two sides of the second threaded rod are provided with second guide rods respectively, each second guide rod is horizontally arranged, the two ends of each second guide rod are fixedly connected with the inner wall of the longitudinal moving frame respectively, and the longitudinal guide block is provided with a second guide port for avoiding each second guide rod respectively.

Preferably, every the top corner of mounting panel is equipped with the installation piece that is used for the installation to receive and release the frame respectively, every installation piece respectively with the top fixed connection of mounting panel, the both sides of mounting panel are equipped with respectively and are the vertical extension board that sets up downwards, the top of lifter plate be equipped with every extension board one-to-one's gib block, the bottom of every gib block respectively with the top fixed connection of lifter plate, the bottom of every extension board is equipped with respectively and is used for supplying the gliding guide way of every gib block.

The utility model has the advantages that: a safety fixing device for a coiled material winding and unwinding frame is generally divided into a winding frame and an unwinding frame, wherein the winding frame and the unwinding frame are respectively arranged on a mounting plate and are respectively fixedly mounted with a mounting block, the mounting plate is more stable in moving due to the arranged guide strip and guide groove, when the winding and unwinding frame is respectively arranged on a hidden rotating plate, if the height of one of the two sides needs to be adjusted, a first handle is manually rotated to rotate a first threaded rod, the first threaded rod drives a lifting guide block to move, the lifting guide block simultaneously drives a lifting plate to move until the other side is adjusted to a required position and stopped, at the moment, a first locking nut is manually screwed to abut against and lock the side wall of a lifting frame, and the arranged first sliding block, the first sliding groove, the first guide rod and the first guide port play a role in guiding and limiting, when the winding and unwinding frame is respectively arranged on the mounting plate, if one of them needs longitudinal adjustment, at this moment, the second handle is rotated manually, make the second threaded rod rotatory, the second threaded rod drives longitudinal direction guide block and removes, longitudinal direction guide block drives mounting panel longitudinal movement simultaneously, stop until adjusting one of them to required position, at this moment, manually twist and move second locking nut, contradict second locking nut and the lateral wall of longitudinal movement frame and lock, the second slider that sets up, the second spout, second guide bar and second guide way play the spacing effect of direction, this equipment can be fixed with the frame of receiving and releasing, and can height-adjusting and longitudinal direction, improve the stability of coiled material receiving and releasing frame when receiving and releasing the coiled material.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic perspective view of a first embodiment of the present invention;

fig. 2 is a side view of an embodiment of the present invention;

fig. 3 is a schematic partial perspective view according to an embodiment of the present invention;

fig. 4 is a schematic partial perspective view of a lifting assembly according to an embodiment of the present invention;

fig. 5 is a partially exploded view of a longitudinal adjustment assembly according to an embodiment of the present invention;

in the figure: the lifting device comprises a base 1, a first adjusting mechanism 2, a second adjusting mechanism 3, a frame 4, a partition plate 5, a lifting plate 6, a mounting plate 7, a lifting frame 8, a first threaded rod 9, a first handle 10, a first locking nut 11, a lifting guide block 12, a rectangular notch 13, a first slider 14, a first sliding groove 15, a first guide rod 16, a longitudinal moving frame 17, a second threaded rod 18, a second handle 19, a second locking nut 20, a longitudinal guide block 21, a second slider 22, a second sliding groove 23, a second guide rod 24, a mounting block 25, an extending plate 26, a guide strip 27 and a guide groove 28.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the safe fixing device for the coiled material winding and unwinding frame comprises a base 1, a first adjusting mechanism 2 and a second adjusting mechanism 3, wherein a frame 4 is arranged on the base 1, the frame 4 is fixedly arranged on the base 1, a partition plate 5 is arranged at the center of the interior of the frame 4, lifting plates 6 are arranged on two sides of the partition plate 5, the first adjusting mechanism 2 and the second adjusting mechanism 3 are respectively arranged on two sides of the partition plate 5, the first adjusting mechanism 2 and the second adjusting mechanism 3 have the same structure, the first adjusting mechanism 2 and the second adjusting mechanism 3 both comprise a longitudinal adjusting assembly and two lifting assemblies, the two lifting assemblies are symmetrically arranged on two sides of the frame 4, working ends of the two lifting assemblies are respectively and fixedly connected with two sides of the lifting plates 6, the longitudinal adjusting assembly is arranged on the top of the lifting plates 6, a mounting plate 7 for fixing the winding and unwinding frame is arranged above the longitudinal adjusting assembly, the bottom of the mounting plate 7 is fixedly connected with the working end of the longitudinal adjusting assembly.

Each lifting component respectively comprises a lifting frame 8, a first threaded rod 9, a first handle 10 and a first locking nut 11, the lifting frame 8 is vertically and fixedly installed on the side wall of the frame 4, the top and the bottom of the lifting frame 8 are respectively provided with a first bearing, the first threaded rod 9 is vertically arranged inside the lifting frame 8, the first threaded rod 9 is provided with a lifting guide block 12, the lifting guide block 12 is provided with a first threaded hole for the threaded connection of the first threaded rod 9, one end of the lifting guide block 12 is fixedly connected with the side wall of the lifting plate 6, the frame 4 is provided with a rectangular notch 13 for avoiding the movement of the lifting guide block 12, the top end and the bottom end of the first threaded rod 9 are respectively inserted into the inner ring of the first bearing in a rotating manner, the bottom end of the first threaded rod 9 can rotatably penetrate through the inner ring of one of the first bearings to extend downwards, the first locking nut 11 is positioned at the extending end of the first threaded rod 9, the first handle 10 is horizontally arranged at the extending end of the first threaded rod 9, the first handle 10 is fixedly connected with the extending end of the first threaded rod 9, when the retractable rack is respectively arranged on the mounting plate, if the height of one of the two sides needs to be adjusted, at the moment, the first handle 10 is manually rotated, the first threaded rod 9 is rotated, the first threaded rod 9 drives the lifting guide block 12 to move, the lifting guide block 12 simultaneously drives the lifting plate 6 to move until the other side is adjusted to a needed position to stop, at the moment, the first locking nut 11 is manually screwed, and the first locking nut 11 is abutted against the side wall of the lifting frame 8 and is locked.

Every the both sides of lift guide block 12 are equipped with first slider 14 respectively, be equipped with respectively on the lift frame 8 and be used for supplying the gliding first spout 15 of every first slider 14, the both sides of first threaded rod 9 are equipped with first guide bar 16 respectively, every first guide bar 16 all is vertical setting, the both ends of every first guide bar 16 respectively with the inner wall fixed connection of lift frame 8, be equipped with respectively on the lift guide block 12 and be used for dodging the first guide way of every first guide bar 16, the first slider 14 of setting, first spout 15, first guide bar 16 and first guide way play the spacing effect of direction.

Each longitudinal adjusting mechanism comprises a longitudinal moving frame 17, a second threaded rod 18, a second handle 19 and a second locking nut 20, the longitudinal moving frame 17 is horizontally and fixedly installed at the top of the lifting plate 6, second bearings are arranged on two sides of the longitudinal moving frame 17, the second threaded rod 18 is horizontally arranged inside the longitudinal moving frame 17, two ends of the second threaded rod 18 can be respectively inserted into the inner ring of each second bearing in a rotating mode, a longitudinal guide block 21 is arranged on the second threaded rod 18, a second threaded hole for the second threaded rod 18 to be in threaded connection is formed in the longitudinal guide block 21, the top of the longitudinal guide block 21 is fixedly connected with the bottom of the mounting plate 7, one end of the second threaded rod 18 can rotatably penetrate through the inner ring of one of the second bearings to extend outwards, the second locking nut 20 is located at the extending end of the second threaded rod 18, the second handle 19 is vertically arranged at the extending end of the second threaded rod 18, the second handle 19 is fixedly connected with the extending end of the second threaded rod 18, when the retractable frame is respectively arranged on the mounting plate 7, if one of the two is required to be longitudinally adjusted, the second handle 19 is manually rotated to enable the second threaded rod 18 to rotate, the second threaded rod 18 drives the longitudinal guide block 21 to move, the longitudinal guide block 21 simultaneously drives the mounting plate 7 to longitudinally move until the other one is adjusted to a required position to stop, and at the moment, the second locking nut 20 is manually screwed to enable the second locking nut 20 to be abutted against the side wall of the longitudinally moving frame 17 and to be locked.

Every the both sides of vertical guide block 21 are equipped with second slider 22 respectively, be equipped with respectively on the longitudinal movement frame 17 and be used for supplying the gliding second spout 23 of every second slider 22, the both sides of second threaded rod 18 are equipped with second guide bar 24 respectively, every second guide bar 24 all is the level setting, the both ends of every second guide bar 24 respectively with the inner wall fixed connection of longitudinal movement frame 17, be equipped with the second guide way that is used for dodging every second guide bar 24 on the longitudinal movement block 21 respectively, the second slider 22 that sets up, second spout 23, second guide bar 24 and second guide way play the spacing effect of direction.

Every the top corner of mounting panel 7 is equipped with the installation piece 25 that is used for the installation to receive and release the frame respectively, every installation piece 25 respectively with the top fixed connection of mounting panel 7, the both sides of mounting panel 7 are equipped with respectively and are vertical extension board 26 that sets up downwards, the top of lifter plate 6 is equipped with the gib block 27 with every extension board 26 one-to-one, the bottom of every gib block 27 respectively with the top fixed connection of lifter plate 6, the bottom of every extension board 26 is equipped with respectively and is used for supplying the gliding guide way 28 of every gib block 27, receive and release the frame and all divide into and receive work or material rest and blowing frame usually, set up respectively on mounting panel 7 with receiving work or material rest and blowing frame, and respectively with mounting block 25 fixed mounting, the gib block 27 and the guide way 28 that set up make mounting panel 7 more stable when.

The working principle is as follows: the collecting and releasing frames are generally divided into a collecting frame and a releasing frame, the collecting frame and the releasing frame are respectively arranged on the mounting plate 7 and are respectively fixedly mounted with the mounting block 25, the arranged guide strip 27 and the arranged guide groove 28 enable the mounting plate 7 to be more stable during movement, when the collecting and releasing frames are respectively arranged on the mounting plate, if the height of one of the two sides needs to be adjusted, at this time, the first handle 10 is manually rotated, the first threaded rod 9 is rotated, the first threaded rod 9 drives the lifting guide block 12 to move, the lifting guide block 12 simultaneously drives the lifting plate 6 to move until the required position of the other side is adjusted and stopped, at this time, the first locking nut 11 is manually screwed, the first locking nut 11 is abutted against and locked with the side wall of the lifting frame 8, the arranged first sliding block 14, the first sliding groove 15, the first guide rod 16 and the first guide port play a role in guiding and limiting, when the collecting and releasing frames are respectively arranged on the mounting plate 7, if one of the two sides needs to be adjusted longitudinally, the second handle 19 is manually rotated to enable the second threaded rod 18 to rotate, the second threaded rod 18 drives the longitudinal guide block 21 to move, the longitudinal guide block 21 simultaneously drives the mounting plate 7 to move longitudinally until the other side needs to be adjusted to the required position, at the moment, the second locking nut 20 is manually screwed to enable the second locking nut 20 to be abutted against the side wall of the longitudinal moving frame 17 and to be locked, and the arranged second sliding block 22, the second sliding groove 23, the second guide rod 24 and the second guide opening play a role in guiding and limiting.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. The utility model provides a safe fixing device of coiled material winding and unwinding frame which characterized in that: comprises a base (1), a first adjusting mechanism (2) and a second adjusting mechanism (3), wherein a frame (4) is arranged on the base (1), the frame (4) is fixedly arranged on the base (1), a partition plate (5) is arranged at the center of the interior of the frame (4), lifting plates (6) are arranged on two sides of the partition plate (5), the first adjusting mechanism (2) and the second adjusting mechanism (3) are respectively positioned on two sides of the partition plate (5), the first adjusting mechanism (2) and the second adjusting mechanism (3) have the same structure, the first adjusting mechanism (2) and the second adjusting mechanism (3) respectively comprise a longitudinal adjusting component and two lifting components, the two lifting components are symmetrically arranged on two sides of the frame (4), working ends of the two lifting components are respectively fixedly connected with two sides of the lifting plates (6), the longitudinal adjusting component is positioned at the top of the lifting plates (6), the upper part of the longitudinal adjusting component is provided with a mounting plate (7) for fixing the retractable frame, and the bottom of the mounting plate (7) is fixedly connected with the working end of the longitudinal adjusting component.

2. The coil material winding and unwinding frame safety fixing device according to claim 1, wherein: each lifting component respectively comprises a lifting frame (8), a first threaded rod (9), a first handle (10) and a first locking nut (11), the lifting frame (8) is vertically and fixedly installed on the side wall of the frame (4), first bearings are respectively arranged at the top and the bottom of the lifting frame (8), the first threaded rod (9) is vertically arranged inside the lifting frame (8), a lifting guide block (12) is arranged on the first threaded rod (9), a first threaded hole for the threaded connection of the first threaded rod (9) is formed in the lifting guide block (12), one end of the lifting guide block (12) is fixedly connected with the side wall of the lifting plate (6), a rectangular notch (13) for avoiding the movement of the lifting guide block (12) is formed in the frame (4), and the top end and the bottom end of the first threaded rod (9) are respectively rotatably inserted into an inner ring of the first bearing, the bottom end of the first threaded rod (9) can rotate and penetrate through the inner ring of one of the first bearings to extend downwards, the first locking nut (11) is located at the extending end of the first threaded rod (9), the first handle (10) is horizontally arranged at the extending end of the first threaded rod (9), and the first handle (10) is fixedly connected with the extending end of the first threaded rod (9).

3. The coil material winding and unwinding frame safety fixing device according to claim 2, wherein: every the both sides of lift guide block (12) are equipped with first slider (14) respectively, be equipped with respectively on lift frame (8) and be used for supplying gliding first spout (15) of every first slider (14), the both sides of first threaded rod (9) are equipped with first guide bar (16) respectively, every first guide bar (16) all are vertical setting, the both ends of every first guide bar (16) respectively with the inner wall fixed connection of lift frame (8), be equipped with respectively on lift guide block (12) and be used for dodging the first guide way of every first guide bar (16), first slider (14) of setting, first spout (15), first guide bar (16) and first guide way play the spacing effect of direction.

4. The coil material winding and unwinding frame safety fixing device according to claim 3, wherein: each longitudinal adjusting component comprises a longitudinal moving frame (17), a second threaded rod (18), a second handle (19) and a second locking nut (20), the longitudinal moving frame (17) is horizontally and fixedly installed at the top of the lifting plate (6), second bearings are arranged on two sides of the longitudinal moving frame (17), the second threaded rod (18) is horizontally arranged inside the longitudinal moving frame (17), two ends of the second threaded rod (18) can be respectively inserted into the inner ring of each second bearing in a rotating mode, a longitudinal guide block (21) is arranged on the second threaded rod (18), the longitudinal guide block (21) is provided with a second threaded hole for the second threaded rod (18) to be in threaded connection, the top of the longitudinal guide block (21) is fixedly connected with the bottom of the mounting plate (7), one end of the second threaded rod (18) can rotatably penetrate through the inner ring of one of the second bearings and extend outwards, the second locking nut (20) is located the extension end of second threaded rod (18), and second handle (19) are vertical setting at the extension end of second threaded rod (18), and second handle (19) and the extension end fixed connection of second threaded rod (18).

5. The coil material winding and unwinding frame safety fixing device according to claim 4, wherein: every the both sides of vertical guide block (21) are equipped with second slider (22) respectively, be equipped with respectively on vertical removal frame (17) and be used for supplying gliding second spout (23) of every second slider (22), the both sides of second threaded rod (18) are equipped with second guide bar (24) respectively, every second guide bar (24) all are the level setting, the both ends of every second guide bar (24) respectively with the inner wall fixed connection of vertical removal frame (17), be equipped with the second guide way that is used for dodging every second guide bar (24) on vertical guide block (21) respectively.

6. The coil material winding and unwinding frame safety fixing device according to claim 5, wherein: every the top corner of mounting panel (7) is equipped with installation piece (25) that are used for the installation to receive and release the frame respectively, every installation piece (25) respectively with the top fixed connection of mounting panel (7), the both sides of mounting panel (7) are equipped with extension board (26) that are vertical setting downwards respectively, the top of lifter plate (6) is equipped with guide bar (27) with every extension board (26) one-to-one, the bottom of every guide bar (27) respectively with the top fixed connection of lifter plate (6), the bottom of every extension board (26) is equipped with respectively and is used for supplying gliding guide way (28) of every guide bar (27).