CN209272636U - A kind of automatic aluminium profile saw cutting device - Google Patents

Abstract

The utility model discloses a kind of automatic aluminium profile saw cutting devices, including conveying rack, liftable feeding mechanism, the material fetching mechanism on rear side of conveying rack, the saw cutting device on the right side of conveying rack on front side of conveying rack；Material fetching mechanism is equipped with the material fetching mechanism being located above feeding mechanism, for changing the displacement mechanism of material fetching mechanism position；Conveying rack is equipped with the feeding mandril positioned at upper layer, positioned at lower layer and evenly distributed conveying drum assembly；In actual use, the straight aluminum profile stacking of generation processing can be placed on feeding mechanism, single or more straight aluminum profile is grabbed from straight aluminum profile stacking by material fetching mechanism again to be placed on conveying drum assembly, and single or more straight aluminum profile is pushed to by feeding mandril and carries out sawing on saw cutting device；This kind of mode avoids manually placing straight aluminum profile, improves production and processing efficiency, reduces production cost, improves the automation when sawing of straight aluminum profile.

Description

A kind of automatic aluminium profile saw cutting device

Technical field

The utility model relates to automatic manufacture fields, more particularly, to a kind of automatic aluminium profile saw cutting device.

Background technique

In existing straight aluminum profile production and processing, need by the way that manually straight aluminum profile is placed on saw cutting device, This kind of mode inefficiency, influences production and processing progress, and the automatic machining device being lack of pertinence at present, affects production effect Rate and production cost.

Utility model content

For overcome the deficiencies in the prior art, the utility model provides a kind of automatic aluminium profile saw cutting device.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of automatic aluminium profile saw cutting device, including conveying rack, be located at liftable feeding mechanism on front side of conveying rack, Material fetching mechanism on rear side of conveying rack, the saw cutting device on the right side of conveying rack；The material fetching mechanism is located at feeder Change feeding position above structure and by displacement mechanism；Under the conveying rack is equipped with the feeding mandril positioned at upper layer, is located at Layer and evenly distributed conveying drum assembly, the feeding mandril will be grabbed and be placed on conveying drum assembly by material fetching mechanism Straight aluminum profile push to and carry out sawing on saw cutting device.

As a preference, the feeding mechanism includes upper and lower two pieces of lifter plates, the X-shaped liter between two-layer lift plate Bar drops；It is opposite on upper and lower two pieces of lifter plates to be equipped with the left fixing leg being located at left broadside, be located at right side and along level side Right fixing leg is housed on the fold line rail of setting, with the folding sliding block of fold line rail cooperation；The X-shaped elevating lever is left The end of right two sides is rotatablely connected with left fixing leg, right fixing leg respectively.

As a preference, the X-shaped elevating lever uses two groups, passes through company between the intersection point of X-shaped elevating lever described in two groups Extension bar series winding, the connecting rod middle part are set with the rolling bearing bar driven by lifting cylinder, the lifting cylinder tail end dress There is rotating shaft base.

As a preference, the conveying drum assembly includes the L shape rolling stand for being loaded on conveying rack lower layer, is used for L shape rolling stand lifting bracket lifting cylinder, the telescopic cylinder loaded on the long section of L shape rolling stand, by telescopic cylinder it is overhanging Outer side edges roller, push up loaded on flat rollers of end side surface outside L shape rolling stand short section, loaded on L shape rolling stand short section inner end The inner side edge roller in face.

As a preference, the feeding mandril right end is equipped with upper flitch, and the upper flitch side is equipped with fixed column, another Side is equipped with L shape upper flitch, and the fixed plate positioned at fixed column opposite side is housed in the L shape upper flitch, and the mounting plate passes through solid Determine cylinder promotion.

As a preference, feeding mandril left end is fixed on L shape feeding top plate by fixing clamp, the L shape Feeding top plate is horizontally slipped by bottom plate on conveying rack upper layer, on the bottom plate be equipped with sliding motor, the sliding motor with Sliding spur rack positioned at conveying rack upper layer is ratcheting, equipped with sliding block, the sliding block and loaded in conveying rack on the bottom plate Line of slide rail cooperation.

As a preference, institute's displacement mechanism include chassis, by L shape connecting bottom board loaded on chassis column, Loaded on column and stretching to the cantilever arm of feeding mechanism；The chassis top surface, lateral surface are respectively arranged with X-axis line rail, the L shape connection Bottom plate medial surface is equipped with the X-axis slide block cooperated with X-axis line rail；Chassis top surface outer side edges are equipped with displacement spur rack, institute's rheme It moves spur rack and the displacement motor on L shape connecting bottom board is ratcheting；The stretching facies lateralis brachii is equipped with Y-axis sliding block, and the Y-axis is sliding Y-axis line rail gantry is slidably connected on block, and rotary screw rod, the rotary screw rod and cantilever arm outside are housed in the Y-axis line rail gantry Feed screw nut's cooperation on face, the material fetching mechanism are loaded on Y-axis line rail gantry front end.

As a preference, the material fetching mechanism includes the Y-axis bottom plate connecting with Y-axis line rail gantry front end and Y-axis bottom plate Line rail bracket connected vertically, the word bracket loaded on mounting plate bottom end, is loaded on a word at the mounting plate loaded on line rail bracket back side The sucker of bracket both ends bottom；Small slide block with line rail support assorted is housed on the Y-axis bottom plate, is equipped with and rises on the mounting plate Drop screw rod, the elevating screw and loaded between small slide block elevating screw nut cooperate.

As a preference, the saw cutting device includes loaded on the board in frames, cutting loaded on board top surface Cut working plate, the turntable bearing loaded on machine bottom, on the cutting working platform plate equipped with by saw blade motor driving and with The vertical sawing saw blade of cutting working platform plate；Rotary cloumn is housed, the Rotary cloumn passes through rotation on the board inner bottom surface Driving device pushes and then board is made to rotate, and the rotation drive device tail end, which is equipped with to be fixed in frames, to be rotated Seat.

As a preference, the saw blade motor back side is connected with the L shape connecting plate across board backboard window, described Lifting slider towards board backboard is housed on L shape connecting plate, is equipped on the board backboard lateral surface and lifting slider cooperates Advance decline line rail, the L shape connecting plate by be located at board backboard medial surface on lifting cylinder promotion gone up and down.

The beneficial effects of the utility model are: this automatic aluminium profile saw cutting device includes conveying rack, is located at conveying rack The liftable feeding mechanism in front side, the material fetching mechanism on rear side of conveying rack, the saw cutting device on the right side of conveying rack；It takes Expect that mechanism is equipped with the material fetching mechanism being located above feeding mechanism, for changing the displacement mechanism of material fetching mechanism position；Conveyer Frame is equipped with the feeding mandril positioned at upper layer, positioned at lower layer and evenly distributed conveying drum assembly；In actual use, it can incite somebody to action The generation straight aluminum profile stacking of processing is placed on feeding mechanism, then list is grabbed from straight aluminum profile stacking by material fetching mechanism Root or more straight aluminum profiles are placed on conveying drum assembly, are pushed single or more straight aluminum profile by feeding mandril Sawing is carried out on to saw cutting device；This kind of mode avoids manually placing straight aluminum profile, improves production and processing efficiency, reduces production Cost improves the automation when sawing of straight aluminum profile.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the stereoscopic schematic diagram of the utility model；

Fig. 2 is the material fetching mechanism stereoscopic schematic diagram one of the utility model；

Fig. 3 is the material fetching mechanism stereoscopic schematic diagram two of the utility model；

Fig. 4 is the saw cutting device diagrammatic cross-section one of the utility model；

Fig. 5 is the saw cutting device diagrammatic cross-section two of the utility model；

Fig. 6 is the saw cutting device partial enlargement diagram one of the utility model；

Fig. 7 is the saw cutting device partial enlargement diagram two of the utility model；

Fig. 8 is the feeding mandril schematic diagram of the utility model；

Fig. 9 is the conveying drum assembly schematic diagram of the utility model；

Figure 10 is the feeding mechanism schematic diagram of the utility model；

Figure 11 is the feeding mechanism diagrammatic cross-section of the utility model.

Specific embodiment

Referring to Fig.1, a kind of automatic aluminium profile saw cutting device, including conveying rack 1, be located at 1 front side liftable of conveying rack Feeding mechanism 2, the material fetching mechanism 3 positioned at the rear side of conveying rack 1, the saw cutting device 4 positioned at 1 right side of conveying rack；Reclaimer Structure 3, which is equipped with, is located at the material fetching mechanism 3 of 2 top of feeding mechanism, for changing the displacement mechanism 5 of 3 position of material fetching mechanism；Conveyer Frame 1 is equipped with the feeding mandril 6 positioned at upper layer, positioned at lower layer and evenly distributed conveying drum assembly 7, and feeding mandril 6 will be by Material fetching mechanism 3 grabs and the straight aluminum profile that is placed on conveying drum assembly 7 pushes to and carries out sawing on saw cutting device 4, In actual use, the straight aluminum profile stacking of generation processing can be placed on feeding mechanism 2, feeding mechanism 2 can be according to straight aluminium The length of profile selects quantity, and feeding mechanism 2 selects two and is individually positioned in straight aluminum profile stacking in the present embodiment Both ends；Single or more straight aluminum profile is grabbed from straight aluminum profile stacking by material fetching mechanism 3 again and is placed on conveying roller On component 7, conveying drum assembly 7 facilitates the rolling of straight aluminum profile to convey；Pass through feeding mandril 6 again for single or more straight Aluminum profile, which pushes to, carries out sawing on saw cutting device 4；This kind of mode avoids manually placing straight aluminum profile, improves production and processing effect Rate reduces production cost, improves the automation when sawing of straight aluminum profile.

Referring to Fig.1 0, shown in Figure 11, feeding mechanism 2 includes upper and lower two pieces of lifter plates 21, the X between two-layer lift plate 21 Shape elevating lever 22；It is opposite on upper and lower two pieces of lifter plates 21 to be equipped with the left fixing leg 23 being located at left broadside, be located at right side and edge Right fixing leg 25 is housed on horizontally arranged fold line rail 24, with the folding sliding block 30 of the cooperation of fold line rail 24；X-shaped liter The end for dropping 22 left and right sides of bar is rotatablely connected with left fixing leg 23, right fixing leg 25 respectively；X-shaped elevating lever 22 works When, 22 right end of X-shaped elevating lever rotates in right fixing leg 25, and Foldable sliding block 30 on fold line rail 24 to the left Slideslip, while 22 left end of X-shaped elevating lever rotates in left fixing leg 23, so that X-shaped elevating lever 22 is unfolded upwards, Form a lifting upward to straight aluminum profile stacking；Complete lifting after, fold sliding block 30 on fold line rail 24 to the right Sliding is folded down X-shaped elevating lever 22.

To increase stabilization when lifting, X-shaped elevating lever 22 uses two groups, passes through company between the intersection point of two groups of X-shaped elevating levers 22 Extension bar 26 is contacted, and is set with the rolling bearing bar 28 driven by lifting cylinder 27,27 tail end of lifting cylinder in the middle part of connecting rod 26 Equipped with rotating shaft base 29；When lifting cylinder 27 works, under the common auxiliary of rolling bearing bar 28, lifting cylinder 27 is with rotation axis Seat 29 rotates upwards for axle center, while pushing connecting rod 26, moves up 26 position of connecting rod, to make X-shaped elevating lever 22 Expansion, it is when X-shaped elevating lever 22 folds, then on the contrary；So that feeding mechanism 2 is steadily moved up, facilitates material fetching mechanism 3 to straight aluminium profiles Material is grabbed, and the stabilization of straight aluminum profile stacking is kept during moving up.

Referring to shown in Fig. 9, conveying drum assembly 7 includes the L shape rolling stand 71 for being loaded on 1 lower layer of conveying rack, for L shape The bracket lifting cylinder 72 of the lifting of rolling stand 71, passes through telescopic cylinder at the telescopic cylinder 73 loaded on the long section of L shape rolling stand 71 73 overhanging outer side edges rollers 74, loaded on flat rollers 75 of end side surface outside 71 short section of L shape rolling stand, be loaded on L shape roller branch The inner side edge roller 76 of 71 short section inner end top surface of frame；Specification in actual production process is different, to conveniently adapt to difference The straight aluminum profile of specification, by telescopic cylinder 73 control outer side edges roller 74 between inner side edge roller 76 at a distance from, Lai Shiying The width of straight aluminum profile, while L shape rolling stand 71 is lifted to control straight aluminum profile water by bracket lifting cylinder 72 The position of plane, the push movement of Lai Peihe feeding mandril 6.

Referring to shown in Fig. 8,6 right end of feeding mandril is equipped with upper flitch 61,61 side of upper flitch is equipped with fixed column 62, the other side Equipped with L shape upper flitch 63, equipped with the fixed plate 64 positioned at 62 opposite side of fixed column in L shape upper flitch 63, fixed plate 64 passes through solid Determine the promotion of cylinder 65, the spacing between fixed plate 64 and fixed column 62 is adjusted by fixed cylinder 65, Lai Shiying different size Straight aluminum profile makes straight aluminum profile keep stablizing when feeding mandril 6 pushes, avoids the occurrence of displacement, appearance when leading to sawing Deviation.

To keep feeding mandril 6 mobile to saw cutting device 4, L shape is fixed on by fixing clamp 11 in displacement 6 left end of feeding mandril On feeding top plate 12, L shape feeding top plate 12 is horizontally slipped by bottom plate 13 on 1 upper layer of conveying rack, equipped with sliding on bottom plate 13 Motor 14, sliding motor 14 and the sliding spur rack 15 for being located at 1 upper layer of conveying rack are ratcheting, can edge when sliding motor 14 rotates The direction of sliding spur rack to saw cutting device 4 is mobile and drives bottom plate 13, so that so that feeding mandril 6 is generated top send movement, for The sliding of bottom plate 13 is closed, sliding block 16 is housed on base 13, sliding block 16 is matched with the line of slide rail 17 loaded on 1 upper layer of conveying rack It closes.

Referring to shown in Fig. 2, Fig. 3, because the specification of different straight aluminum profiles is different, need to change feeding by displacement mechanism 5 The position of mechanism 3, upper displacement mechanism 5 include chassis 51, the column 53 being loaded on chassis 51 by L shape connecting bottom board 52, fill In on column 53 and stretching to the cantilever arm 54 of feeding mechanism 2；For the position for controlling material fetching mechanism 3 or so, in 51 top surface of chassis, outer Side is respectively arranged with X-axis line rail 55, and 52 medial surface of L shape connecting bottom board is set to the X-axis slide block 5616 cooperated with X-axis line rail 55, makes L shape Connecting bottom board 52 can horizontally slip on chassis 51；For the displacement for controlling L shape connecting bottom board 52, set in 51 top surface outer side edges of chassis There is displacement spur rack 57, the displacement motor 58 being displaced on spur rack 57 and L shape connecting bottom board 52 is ratcheting, passes through 58 turns of displacement motor The change of position drives the position change of bottom plate 13 on displacement spur rack 57 after dynamic；For the position of 3 front and back of control material fetching mechanism It sets, Y-axis line rail gantry 59 is equipped on 54 lateral surface of cantilever arm, rotary screw rod 502, rotary screw rod 502 are housed in Y-axis line rail gantry 59 Cooperate with the feed screw nut 503 on 54 lateral surface of cantilever arm, by the operating of rotary screw rod 502, make Y-axis line rail gantry 59 occur to Preceding or displacement backward, it is smooth steady to be displaced Y-axis line rail gantry 59, it is equipped on cantilever arm 54 and Y-axis line rail gantry 59 cooperates Y-axis sliding block 501 to make the front-rear position of material fetching mechanism 3 loaded on 59 front end of Y-axis line rail gantry change.

For convenience of straight aluminum profile stacking is removed from feeding mechanism 2, material fetching mechanism 3 include with before Y-axis line rail gantry 59 Hold the Y-axis bottom plate 31 and the line rail bracket 32 connected vertically of Y-axis bottom plate 31, the mounting plate loaded on 32 back side of line rail bracket of connection 33, the word bracket (37) loaded on 33 bottom end of mounting plate, the sucker (38) loaded on word bracket (37) both ends bottom, pass through sucker (38) straight aluminum profile is subjected to absorption fixation；Equipped with the small slide block 36 cooperated with line rail bracket 32, installation on Y-axis bottom plate 31 Plate 33 is vertically moved on small slide block 36 by line rail bracket 32, is vertically moved for further control accurate Property, on mounting plate 33 install elevating screw 34, elevating screw 34 and loaded between small slide block 36 elevating screw nut 35 cooperate.

Referring to shown in Fig. 4-Fig. 7, saw cutting device 4 includes the board 42 being loaded in frames 41, loaded on 42 top surface of board Cutting working platform plate 43, the turntable bearing 44 loaded on 42 bottom of board, equipped with passing through saw blade motor on cutting working platform plate 43 45 driving and the sawing saw blade 46 vertical with cutting working platform plate 43 needed according to the difference of process requirements to straight aluminum profile The cutting of different angle is carried out, board 42 is rotated by turntable bearing 44, makes the saw blade position on cutting working platform plate 43 It changes, so as to which straight aluminum profile is cut into different angle；To enable board 42 to rotate, on 42 inner bottom surface of board Equipped with Rotary cloumn 47, Rotary cloumn 47 makes board 42 rotate by the promotion of rotation drive device 48, rotation driving Device 48 uses cylinder in the present embodiment, and 48 tail end of rotation drive device, which is equipped with, is fixed on rotating seat 49 in frames 41； Cooperate when rotation drive device 48 works with limiting device, Rotary cloumn 47 will be pushed circumferentially rotated, to make machine Platform 42 rotates, 45 ° of Lai Shixian, 90 °, 135 ° of quantitative angle, and electric cylinder, rotation horse can also be used in rotation drive device 48 It reaches, 45 ° of -135 ° of Arbitrary Rotations of Lai Shixian board 42.

Above-mentioned 45 back side of saw blade motor is connected with the L shape connecting plate 401 across 42 backboard window of board, L shape connecting plate 401 Lifting slider 402 towards 42 backboard of board is above housed, the liter cooperated with lifting slider 402 is housed on 42 backboard lateral surface of board Line rail 403 drops, and L shape connecting plate 401 is gone up and down by the promotion of lifting cylinder 404 being located on 42 backboard medial surface of board, from And change the height that sawing saw blade 46 stretches out cutting working platform plate 43, thus to adapt to the straight aluminum profile of different size.

According to above-mentioned principle, the utility model can also be made appropriate changes and modifications to the above embodiments.Therefore, The utility model is not limited to specific embodiment disclosed and described above, to some modifications and changes of the utility model It should also be as falling into the protection scope of the claims of the present utility model.

Claims (10)

1. a kind of automatic aluminium profile saw cutting device, which is characterized in that including conveying rack (1), be located at conveying rack (1) on front side of can The feeding mechanism (2) of lifting, the material fetching mechanism (3) being located on rear side of conveying rack (1), the sawing being located on the right side of conveying rack (1) Device (4)；The material fetching mechanism (3) is located above feeding mechanism (2) and changes feeding position by displacement mechanism (5)；It is described Conveying rack (1) is equipped with the feeding mandril (6) positioned at upper layer, positioned at lower layer and evenly distributed conveying drum assembly (7), institute State that feeding mandril (6) will be grabbed by material fetching mechanism (3) and the straight aluminum profile that is placed on conveying drum assembly (7) pushes to saw Cutting apparatus carries out sawing on (4).

2. a kind of automatic aluminium profile saw cutting device according to claim 1, which is characterized in that feeding mechanism (2) packet Include two pieces of lifter plates (21), the X-shaped elevating lever (22) being set between two-layer lift plate (21) up and down；Upper and lower two pieces of lifter plates (21) opposite on to be equipped with the left fixing leg (23) being located at left broadside, positioned at right side and horizontally disposed fold line rail (24), right fixing leg (25) are housed on the folding sliding block (30) of the fold line rail (24) cooperation；The X-shaped elevating lever (22) end at left and right sides of is rotatablely connected with left fixing leg (23), right fixing leg (25) respectively.

3. a kind of automatic aluminium profile saw cutting device according to claim 2, which is characterized in that the X-shaped elevating lever (22) Using two groups, contacted between the intersection point of X-shaped elevating lever (22) described in two groups by connecting rod (26), set in the middle part of the connecting rod (26) Equipped with the rolling bearing bar (28) driven by lifting cylinder (27), lifting cylinder (27) tail end is equipped with rotating shaft base (29)。

4. a kind of automatic aluminium profile saw cutting device according to claim 1, which is characterized in that the conveying drum assembly It (7) include the L shape rolling stand (71) loaded on conveying rack (1) lower layer, the bracket lifting for L shape rolling stand (71) lifting Cylinder (72), passes through telescopic cylinder (73) overhanging outer side edges rolling at the telescopic cylinder (73) loaded on L shape rolling stand (71) long section Cylinder (74), is loaded on L shape rolling stand (71) short section at the flat rollers (75) loaded on the outer end side surface of L shape rolling stand (71) short section The inner side edge roller (76) of inner end top surface.

5. a kind of automatic aluminium profile saw cutting device according to claim 1, which is characterized in that the feeding mandril (6) is right End is equipped with upper flitch (61), and upper flitch (61) side is equipped with L shape upper flitch (63), institute equipped with fixed column (62), the other side It states equipped with the fixed plate (64) positioned at fixed column (62) opposite side in L shape upper flitch (63), the fixed plate (64) passes through fixed gas Cylinder (65) pushes.

6. a kind of automatic aluminium profile saw cutting device according to claim 5, which is characterized in that the feeding mandril (6) is left End is fixed on L shape feeding top plate (12) by fixing clamp (11), and the L shape feeding top plate (12) is by bottom plate (13) in conveying Rack (1) upper layer horizontally slips, equipped with sliding motor (14), the sliding motor (14) and positioned at conveying on the bottom plate (13) The sliding spur rack (15) on rack (1) upper layer is ratcheting, on the bottom plate (13) be equipped with sliding block (16), the sliding block (16) be loaded on Line of slide rail (17) cooperation in conveying rack (1).

7. a kind of automatic aluminium profile saw cutting device according to claim 1, which is characterized in that institute's displacement mechanism (5) packet Chassis (51), the column (53) being loaded on chassis (51) by L shape connecting bottom board (52) are included, is loaded on column (53) and stretches to and send Expect the cantilever arm (54) of mechanism (2)；Chassis (51) top surface, lateral surface are respectively arranged with X-axis line rail (55), and the L shape connects bottom Plate (52) medial surface is equipped with the X-axis slide block (56) cooperated with X-axis line rail (55)；Chassis (51) the top surface outer side edges are equipped with displacement Spur rack (57), displacement spur rack (57) and the displacement motor (58) on L shape connecting bottom board (52) are ratcheting；The cantilever arm (54) lateral surface is equipped with Y-axis sliding block (501), slidably connects Y-axis line rail gantry (59), the Y on the Y-axis sliding block (501) Rotary screw rod (502) are housed in axis rail gantry (59), the screw rod spiral shell on the rotary screw rod (502) and cantilever arm (54) lateral surface Female (503) cooperation, the material fetching mechanism (3) are loaded on Y-axis line rail gantry (59) front end.

8. a kind of automatic aluminium profile saw cutting device according to claim 7, which is characterized in that material fetching mechanism (3) packet Include the Y-axis bottom plate (31) connecting with Y-axis line rail gantry (59) front end and Y-axis bottom plate (31) line rail bracket (32) connected vertically, dress Mounting plate (33) in line rail bracket (32) back side, is loaded on a word bracket at the word bracket (37) loaded on mounting plate (33) bottom end (37) sucker (38) of both ends bottom；Equipped with the small slide block (36) cooperated with line rail bracket (32), institute on the Y-axis bottom plate (31) It states on mounting plate (33) equipped with elevating screw (34), the elevating screw (34) and loaded on the elevating screw spiral shell between small slide block (36) Female (35) cooperation.

9. a kind of automatic aluminium profile saw cutting device according to claim 1, which is characterized in that saw cutting device (4) packet It includes loaded on the board (42) in frames (41), the cutting working platform plate (43) loaded on board (42) top surface, loaded on board (42) the turntable bearing (44) of bottom, on the cutting working platform plate (43) equipped with driven by saw blade motor (45) and with cutting The vertical sawing saw blade (46) of working plate (43)；Rotary cloumn (47) are housed on board (42) inner bottom surface, the rotation Column (47) is pushed by rotation drive device (48) makes board (42) rotate, rotation drive device (48) tail End, which is equipped with, is fixed on rotating seat (49) on frames (41).

10. a kind of automatic aluminium profile saw cutting device according to claim 9, which is characterized in that the saw blade motor (45) Back side is connected with the L shape connecting plate (401) across board (42) backboard window, is equipped on the L shape connecting plate (401) towards machine The lifting slider (402) of platform (42) backboard, equipped with the liter cooperated with lifting slider (402) on board (42) the backboard lateral surface It drops line rail (403), the L shape connecting plate (401) is pushed by the lifting cylinder (404) being located on board (42) backboard medial surface It is gone up and down.