CN211338701U - High-efficient adsorption paper feeding device of printed matter - Google Patents

Abstract

The utility model belongs to the technical field of the printed matter processing technique and specifically relates to a high-efficient adsorption paper feeding device of printed matter is related to, which comprises a carriage body, the support frame of setting on the automobile body and the pushing hands of setting on the support frame, be provided with the rack on the automobile body, the rack is used for placing the paper, be provided with on the rack and be used for carrying out the clamping device of centre gripping to the paper, clamping device includes the centre gripping subassembly and is used for driving the drive assembly that the centre gripping subassembly carries out the centre gripping to the paper, centre gripping subassembly and drive assembly all set up on the rack, the fixed adsorption paper feeding device that is used for carrying out the paper to the paper that is provided with on the support frame, adsorption paper feeding device is including being used for carrying out the promotion subassembly that promotes to. Through being provided with clamping device on the rack, carry out the centre gripping to the paper, can avoid the paper transportation in-process, take place the crooked condition or empty, great promotion the paper carry, go up the efficiency of paper.

Description

High-efficient adsorption paper feeding device of printed matter

Technical Field

The utility model belongs to the technical field of the printed matter processing technique and specifically relates to a high-efficient adsorption paper feeding device of printed matter is related to.

Background

At present, printed matters refer to various printed products such as books, newspapers and pictures, and are a general term for various finished products produced by using a printing technology. In daily life, newspapers, books and magazines, maps, posters, advertisements, envelopes, letter papers, file bags, trademarks, labels, business cards, invitation cards, bank notes, greeting cards, desk calendars, wall calendars, picture albums, various certificate cards, packing boxes, gift boxes, circuit boards and the like which people contact are in the category of printed matters. The presswork needs to be carried the shaping cutting device department through the adsorption paper feeding device and carries out cutting process at the printed matter in the course of working.

The prior Chinese patent with publication number CN207699141U discloses a high-efficiency paper feeding device of a printing machine, which comprises a paper pushing vehicle for carrying paper and a paper material hoister for hoisting the paper on the paper pushing vehicle to a workbench of the printing equipment, wherein the paper material hoister is arranged at the side of the workbench of the printing equipment and comprises a frame, a hoisting mechanism and a paper carrying table connected with the hoisting mechanism, the hoisting mechanism comprises a driving mechanism and a transmission mechanism, the driving mechanism is a speed reducer, the transmission mechanism comprises a rotating shaft and a transmission chain wheel which are connected with the speed reducer, one end of the transmission chain wheel is in winding connection with the rotating shaft, the other end of the transmission chain wheel is fixedly connected with the paper carrying table, the frame comprises a fixed frame for fixing the hoisting mechanism and the paper carrying table and a sliding guide frame for positioning the paper pushing vehicle, when feeding paper, the paper can be transported from a raw material storage place to the paper carrying table by the paper pushing vehicle and then hoisted to the workbench of the printing, realize the machine and promote, practiced thrift the manpower.

The above prior art solutions have the following drawbacks: this paper device on high-efficient printing machine can carry out effectual going up paper to the paper, but at the in-process of going up paper, transports the paper from raw materials storage ground to the paper carrying bench through the shallow, can not carry on spacingly to the paper, leads to in the transportation, and the paper takes place the situation that is crooked or topples over easily to great influence paper is carried, is gone up the efficiency of paper, consequently, needs improve it.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a high-efficient adsorption paper feeding device of printed matter, it is through being provided with clamping device on the rack, and drive assembly drive clamping component carries out fixed centre gripping to the paper, then transports, can avoid the automobile body to the paper transportation in-process, the condition that the paper takes place crooked or topples over easily to great promotion the paper carry, the efficiency of going up paper.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a high-efficient adsorption paper feeding device of printed matter, includes the automobile body, sets up support frame and the pushing hands of setting on the support frame on the automobile body, be provided with the rack on the automobile body, the rack is used for placing the paper, be provided with the clamping device who is used for carrying out the centre gripping to the paper on the rack, clamping device includes the centre gripping subassembly and is used for driving the drive assembly that the centre gripping subassembly carries out the centre gripping to the paper, centre gripping subassembly and drive assembly all set up on the rack, the fixed adsorption paper feeding device that is used for carrying out the paper to the paper that is provided with on the support frame, adsorption paper feeding device is including being used for carrying out the promotion subassembly that promotes and being used for carrying out the propelling movement subassembly to the paper to the.

Through adopting above-mentioned technical scheme, place the paper on the rack, start drive assembly, drive the motion of centre gripping subassembly, carry out the centre gripping to the paper, can avoid in the paper transportation process, the paper takes place the condition crooked or empty easily, thereby great promotion the paper is carried, the efficiency of going up paper, accomplish the back with the paper centre gripping through clamping device, the user is through promoting the pushing hands, remove the automobile body to tailor platform department, then loosen the paper through clamping device, start adsorption paper feeding device and carry out the operation of form advancing with the paper, the simple operation.

The present invention may be further configured in a preferred embodiment as: the drive assembly comprises a storage battery, a drive device and a rotating rod, wherein the storage battery and the drive device are fixedly arranged on the placing frame, the storage battery and the drive device are electrically connected, the rotating rod is coaxially fixed on an output shaft of the drive device, a threaded part is arranged on the rotating rod, the threaded part of the rotating rod at the two ends in the length direction is a reverse thread, the clamping assembly is arranged on the threaded part, and the clamping assembly is in threaded connection with the threaded part.

Through adopting above-mentioned technical scheme, provide the power for drive arrangement through storage battery, start drive arrangement, drive the dwang and rotate, drive screw thread portion and rotate, when screw thread portion rotated, can drive the motion of centre gripping subassembly to can realize that the centre gripping subassembly carries out the centre gripping to the paper.

The present invention may be further configured in a preferred embodiment as: the clamping assembly comprises a sliding block and a clamping plate, the sliding block is sleeved on the threaded portion, the sliding block is in threaded connection with the threaded portion, the sliding block is in sliding fit with the rotating rod, and the clamping plate is fixedly arranged on the sliding block.

Through adopting above-mentioned technical scheme, when screw thread portion rotated, can drive the slider and slide along the dwang, the motion that is close to each other is done to two adjacent sliders, drives the grip block and fixes the centre gripping to the side of paper, and the back is accomplished in the centre gripping, closes drive arrangement, and the simple operation can avoid in the paper transportation process, the condition that the paper takes place crooked or emptys easily.

The present invention may be further configured in a preferred embodiment as: the mounting groove has been seted up on the rack, dwang and slider all set up in the mounting groove, and slider and mounting groove sliding fit.

Through adopting above-mentioned technical scheme, seted up the mounting groove on the rack, dwang and slider all set up in the mounting groove, make the slider can realize when screw thread portion rotates, slide in the mounting groove simultaneously to, more stable when making the slider slide.

The present invention may be further configured in a preferred embodiment as: the lifting assembly comprises a driving motor, a rotary rod and a rotating gear, the driving motor is fixedly arranged on the support frame, an output shaft of the driving motor penetrates through the support frame, the output shaft of the driving motor is in running fit with the support frame, the rotary rod is coaxially fixed on the output shaft of the driving motor, the rotating gear is sleeved on the rotary rod, a toothed chain is sleeved on the rotating gear, one end of the toothed chain is fixedly connected with the placing frame, and a balancing weight is fixedly arranged at the other end of the toothed chain.

Through adopting above-mentioned technical scheme, provide the power for driving motor through storage battery, start driving motor, drive the rotary rod and rotate, drive the running gear rotation, then running gear drives the toothed chain rotation, drives the rack and is the motion that rises, and the toothed chain drives the balancing weight and is the motion that descends simultaneously to can drive the rack and promote the simple operation.

The present invention may be further configured in a preferred embodiment as: the support frame is provided with a chute, the placing frame and the balancing weight are embedded in the chute, and the placing frame and the balancing weight are in sliding fit with the chute.

Through adopting above-mentioned technical scheme, seted up the spout on the support frame, rack and balancing weight all inlay in the spout, through the setting of spout, make the chain of teeth can drive rack and balancing weight and slide in the spout, because under the effect of the gravity of rack and paper self, make the rack can keep the level setting, avoid promoting the in-process to the rack, the rack takes place the slope.

The present invention may be further configured in a preferred embodiment as: the supporting rod is fixedly arranged on the vehicle body, a movable groove is formed in the supporting rod, a movable block is fixedly arranged on the placing frame and embedded in the movable groove, and the movable block is in sliding fit with the movable groove.

Through adopting above-mentioned technical scheme, when the rack promoted, can drive the movable block and slide in the activity inslot of bracing piece to support the rack through the bracing piece, avoid because under the effect of the gravity of rack and paper self, make the rack can not keep the level setting, the rack promotes the in-process, and the rack takes place the slope.

The present invention may be further configured in a preferred embodiment as: the propelling movement subassembly includes cylinder and push plate, the cylinder is fixed to be set up on the support frame, the flexible end of cylinder wears to locate in the support frame, and flexible end and support frame sliding fit, push plate is fixed to be set up in flexible serving.

Through adopting above-mentioned technical scheme, promote rack and paper and accomplish the back, the lower surface of push plate and the upper surface parallel and level of rack, then start the cylinder, make the flexible end of cylinder drive the push plate motion to promote the paper to the direction upward motion of being close to the cutting table, realize the propelling movement to the paper, simple structure, the simple operation.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the clamping device is arranged on the placing frame, the driving assembly drives the clamping assembly to fixedly clamp the paper and then transport the paper, so that the situation that the paper is prone to being skewed or toppled in the process of conveying the paper by the vehicle body can be avoided, and the paper conveying and feeding efficiency is greatly improved;

2. the lifting assembly is arranged on the support frame, the storage battery is used for providing power for the driving motor, the driving motor is started to drive the rotating rod to rotate, the rotating gear is driven to rotate, then the rotating gear drives the toothed chain to rotate, the placing frame is driven to move upwards, and meanwhile the toothed chain drives the balancing weight to move downwards, so that the placing frame can be driven to lift, and the operation is convenient and fast;

3. through the fixed bracing piece that is provided with on the automobile body, when the rack promoted, can drive the movable block and slide in the activity inslot of bracing piece to support the rack through the bracing piece, avoid because under the effect of the gravity of rack and paper self, make the rack can not keep the level setting, the rack promotes the in-process, and the rack takes place the slope.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic view showing a connection structure of the rack and the sheet feeding device.

Reference numerals: 1. a vehicle body; 2. a support frame; 21. a chute; 3. a pushing handle; 4. placing a rack; 41. mounting grooves; 42. a movable block; 43. a conveying roller; 5. paper; 6. a clamping device; 61. a clamping assembly; 611. a slider; 612. a clamping plate; 62. a drive assembly; 621. a battery pack; 622. a drive device; 623. rotating the rod; 624. a threaded portion; 7. a paper feeding device; 71. a lifting assembly; 711. a drive motor; 712. rotating the rod; 713. a rotating gear; 714. a toothed chain; 715. a balancing weight; 72. a push assembly; 721. a cylinder; 722. a push plate; 8. a support bar; 9. and (5) a cutting table.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a high-efficient adsorption paper feeding device of printed matter, including automobile body 1, the support frame 2 of setting on automobile body 1 and the pushing hands 3 of setting on support frame 2, be provided with rack 4 on the automobile body 1, rack 4 is used for placing paper 5, is provided with on the rack 4 to be used for carrying out the clamping device 6 of centre gripping to paper 5, and the fixed adsorption paper feeding device 7 that is used for carrying out paper 5 on support frame 2, and one side of automobile body 1 is provided with tailoring table 9. When paper 5 needs to be fed, the paper 5 is placed on the placing frame 4, the clamping device 6 is started to fixedly clamp the paper 5, the situation that the paper 5 is inclined or toppled over easily in the conveying process of the paper 5 can be avoided, and therefore the conveying efficiency and the paper feeding efficiency of the paper 5 are greatly improved. After the paper 5 is clamped by the clamping device 6, a user moves the vehicle body 1 to the cutting table 9 by pushing the push handle 3, then loosens the paper 5 through the clamping device 6, and starts the paper feeding device 7 to convey the paper 5 to the cutting table 9 for next cutting operation.

Referring to fig. 1 and 2, the clamping device 6 includes a clamping assembly 61 and a driving assembly 62 for driving the clamping assembly 61 to clamp the paper 5, and both the clamping assembly 61 and the driving assembly 62 are disposed on the placing frame 4. When needing to carry out the centre gripping to paper 5 through clamping device 6, start drive assembly 62, drive the motion of centre gripping subassembly 61 motion, carry out the centre gripping and loosen the motion to paper 5 to avoid in the paper 5 transportation process, the condition that paper 5 takes place to be crooked or empty easily, thereby great promotion paper 5 carry, go up the efficiency of paper.

Referring to fig. 1 and 2, the driving assembly 62 includes a battery 621, a driving device 622, and a rotating rod 623, the battery 621 and the driving device 622 are both fixedly disposed on the rack 4, the battery 621 is electrically connected to the driving device 622, and the driving device 622 can be directly formed by a motor. Referring to fig. 3, the rotating rod 623 is coaxially fixed to the output shaft of the driving device 622, the rotating rod 623 is provided with a threaded portion 624, the threaded portions 624 at both ends of the rotating rod 623 in the length direction thereof are reverse threads, the clamping member 61 is provided on the threaded portion 624, and the clamping member 61 is threadedly coupled to the threaded portion 624. When needing to carry out the centre gripping to paper 5, provide the power for drive arrangement 622 through storage battery 621, start drive arrangement 622, drive dwang 623 and rotate, drive screw portion 624 rotates, and screw portion 624 rotates, can drive the motion of centre gripping subassembly 61 to carry out the centre gripping to paper 5.

Referring to fig. 1 and 2, the clamping assembly 61 includes a sliding block 611 and a clamping plate 612, the sliding block 611 is sleeved on the threaded portion 624, the sliding block 611 is in threaded connection with the threaded portion 624, the sliding block 611 is in sliding fit with the rotating rod 623, and the clamping plate 612 is fixedly disposed on the sliding block 611. With reference to fig. 3, a mounting groove 41 is formed on the placement frame 4, the rotating rod 623 and the sliding block 611 are both disposed in the mounting groove 41, and the sliding block 611 is in sliding fit with the mounting groove 41. When the thread portion 624 rotates, the sliding blocks 611 can be driven to slide along the rotating rod 623 in the mounting groove 41, two adjacent sliding blocks 611 move close to each other, the clamping plate 612 is driven to fixedly clamp the side surface of the paper 5, and after clamping is completed, the driving device 622 is closed.

Referring to fig. 1 and 3, after the paper 5 is clamped, the user pushes the pushing handle 3 to move the cart body 1 to the cutting table 9, and then starts the driving device 622 to drive the clamping plates 612 to move away from each other in the mounting groove 41, so as to loosen the paper 5, and then the paper 5 is fed by the feeding device 7. The paper feeding device 7 comprises a lifting component 71 for lifting the placing frame 4 and a pushing component 72 for pushing the paper 5, and the lifting component 71 and the pushing component 72 are both arranged on the supporting frame 2. The lifting assembly 71 is started, the lower surface of the placing frame 4 is lifted to the height level with the upper surface of the cutting table 9, then the pushing assembly 72 is started, the paper 5 is pushed to move towards the cutting table 9, the paper 5 is pushed onto the cutting table 9, and paper feeding operation of the paper 5 is completed.

Referring to fig. 1 and 3, the lifting assembly 71 includes a driving motor 711, a rotating rod 712 and a rotating gear 713, the driving motor 711 is fixedly disposed on the supporting frame 2, an output shaft of the driving motor 711 penetrates through the supporting frame 2, the output shaft of the driving motor 711 is in running fit with the supporting frame 2, the rotating rod 712 is coaxially fixed on the output shaft of the driving motor 711, the rotating gear 713 is sleeved on the rotating rod 712, a toothed chain 714 is sleeved on the rotating gear 713, one end of the toothed chain 714 is fixedly connected with the rack 4, and a balancing weight 715 is fixedly disposed at the other end. The battery pack 621 is electrically connected to the driving motor 711, and the battery pack 621 supplies power to the driving motor 711, so as to start the driving motor 711, drive the rotating rod 712 to rotate, drive the rotating gear 713 to rotate, and then drive the toothed chain 714 to rotate by the rotating gear 713. Combine fig. 2, seted up spout 21 on the support frame 2, rack 4 and balancing weight 715 all inlay in spout 21, and rack 4 and balancing weight 715 and spout 21 sliding fit. When the toothed chain 714 rotates, the rack 4 is driven to move upwards in the sliding groove 21, and meanwhile the toothed chain 714 drives the balancing weight 715 to move downwards in the sliding groove 21, so that the rack 4 can be driven to lift, the upper surface of the rack 4 is lifted to a height which is parallel to and level with the upper surface of the cutting table 9, the driving motor 711 is closed, and lifting of the paper 5 is completed.

Referring to fig. 1 and 2, a support rod 8 is fixedly arranged on the vehicle body 1, a movable groove is formed in the support rod 8, a movable block 42 is fixedly arranged on the placing frame 4, the movable block 42 is embedded in the movable groove, and the movable block 42 is in sliding fit with the movable groove. When the placing frame 4 is lifted, the movable block 42 can be driven to slide in the movable groove of the supporting rod 8, so that the placing frame 4 is supported through the supporting rod 8, the situation that the placing frame 4 cannot be horizontally arranged due to the gravity of the placing frame 4 and the paper 5 is avoided, and the placing frame 4 is lifted in the process of inclining. After lifting the upper surface of the rack 4 to a level with the upper surface of the cutting table 9, the drive motor 711 is turned off.

Referring to fig. 1 and 3, the pushing assembly 72 includes an air cylinder 721 and a pushing plate 722, the air cylinder 721 is fixedly disposed on the supporting frame 2, and an air compressor can be directly and fixedly disposed on the supporting frame 2 to provide an air source for the air cylinder 721. The telescopic end of the cylinder 721 penetrates through the support frame 2, the telescopic end is in sliding fit with the support frame 2, and the pushing plate 722 is fixedly arranged on the telescopic end. After the placing frame 4 and the paper 5 are lifted, the lower surface of the pushing plate 722 is flush with the upper surface of the placing frame 4, and then the air cylinder 721 is started, so that the telescopic end of the air cylinder 721 drives the pushing plate 722 to move, and the paper 5 is pushed to move in the direction close to the cutting table 9. The placing frame 4 is provided with a plurality of conveying rollers 43, so that the pushing plate 722 can push the paper 5 to move towards the cutting table 9 more efficiently. When the pushing plate 722 pushes the paper 5 to the cutting table 9, the air cylinder 721 is turned off, and the paper feeding operation for the paper 5 is completed. Then, the cylinder 721 is activated to drive the pushing plate 722 to reset, and at the same time, the driving motor 722 is activated to drive the placing frame 4 to reset for the next paper feeding operation.

The implementation principle of the embodiment is as follows: when paper 5 needs to be fed, the paper 5 is placed on the placing frame 4, the driving device 622 is started, the rotating rod 623 is driven to rotate, the threaded portion 624 is driven to rotate, the sliding blocks 611 can be driven to slide along the rotating rod 623 in the mounting groove 41 when the threaded portion 624 rotates, the two adjacent sliding blocks 611 move close to each other, the clamping plates 612 are driven to fixedly clamp the side surfaces of the paper 5, and the driving device 622 is closed after clamping is completed. The user is through promoting pushing hands 3, remove automobile body 1 to cutting table 9 department, then start drive arrangement 622, drive grip block 612 and do the motion of keeping away from each other in mounting groove 41, make grip block 612 loosen paper 5, start driving motor 711, drive rotary rod 712 rotates, drive rotating gear 713 rotates, then rotating gear 713 drives toothed chain 714 and rotates, drive rack 4 is the motion that rises in spout 21, toothed chain 714 drives balancing weight 715 and is the motion that descends in spout 21 simultaneously, after the upper surface lift of rack 4 to the height with the upper surface parallel and level of cutting table 9, close driving motor 711. Then, the air cylinder 721 is started, the telescopic end of the air cylinder 721 drives the pushing plate 722 to move, so that the paper 5 is pushed to move in a direction close to the cutting table 9, and after the pushing plate 722 pushes the paper 5 onto the cutting table 9, the air cylinder 721 is closed, and the paper feeding operation for the paper 5 is completed.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a high-efficient adsorption paper feeding device of printed matter, includes automobile body (1), sets up support frame (2) on automobile body (1) and sets up pushing hands (3) on support frame (2), a serial communication port, be provided with rack (4) on automobile body (1), rack (4) are used for placing paper (5), be provided with on rack (4) and be used for carrying out clamping device (6) of centre gripping to paper (5), clamping device (6) include centre gripping subassembly (61) and be used for driving drive assembly (62) that centre gripping subassembly (61) carry out the centre gripping to paper (5), centre gripping subassembly (61) and drive assembly (62) all set up on rack (4), fixed adsorption paper feeding device (7) that are used for carrying out paper (5) on support frame (2) are provided with, adsorption paper feeding device (7) are including being used for carrying out promotion subassembly (71) that promote to rack (4) and being used for carrying out the propelling movement to paper (5) The lifting component (71) and the pushing component (72) are arranged on the supporting frame (2).

2. The efficient paper feeding device for the printed matters as claimed in claim 1, wherein the driving assembly (62) comprises a storage battery (621), a driving device (622) and a rotating rod (623), the storage battery (621) and the driving device (622) are both fixedly arranged on the placing frame (4), the storage battery (621) is electrically connected with the driving device (622), the rotating rod (623) is coaxially fixed on an output shaft of the driving device (622), a threaded portion (624) is arranged on the rotating rod (623), the threaded portion (624) at two ends of the rotating rod (623) in the length direction is reverse threads, the clamping assembly (61) is arranged on the threaded portion (624), and the clamping assembly (61) is in threaded connection with the threaded portion (624).

3. The efficient paper feeding device for the printed matters as claimed in claim 2, wherein the clamping assembly (61) comprises a sliding block (611) and a clamping plate (612), the sliding block (611) is sleeved on the threaded portion (624), the sliding block (611) is in threaded connection with the threaded portion (624), the sliding block (611) is in sliding fit with the rotating rod (623), and the clamping plate (612) is fixedly arranged on the sliding block (611).

4. The efficient paper feeding device for the printed matters as claimed in claim 3, wherein a mounting groove (41) is formed in the placing frame (4), the rotating rod (623) and the sliding block (611) are both arranged in the mounting groove (41), and the sliding block (611) is in sliding fit with the mounting groove (41).

5. The efficient paper feeding device for the printed matters as claimed in claim 4, wherein the lifting assembly (71) comprises a driving motor (711), a rotating rod (712) and a rotating gear (713), the driving motor (711) is fixedly arranged on the support frame (2), an output shaft of the driving motor (711) penetrates through the support frame (2), the output shaft of the driving motor (711) is in running fit with the support frame (2), the rotating rod (712) is coaxially fixed on the output shaft of the driving motor (711), the rotating gear (713) is sleeved on the rotating rod (712), a toothed chain (714) is sleeved on the rotating gear (713), one end of the toothed chain (714) is fixedly connected with the placing frame (4), and a balancing weight (715) is fixedly arranged at the other end of the toothed chain (714).

6. The efficient paper feeding device for the printed matters as claimed in claim 5, wherein a sliding groove (21) is formed in the supporting frame (2), the placing frame (4) and the balancing weight (715) are embedded in the sliding groove (21), and the placing frame (4) and the balancing weight (715) are in sliding fit with the sliding groove (21).

7. The efficient printed matter paper feeding device as claimed in claim 6, wherein a support rod (8) is fixedly arranged on the vehicle body (1), a movable groove is formed in the support rod (8), a movable block (42) is fixedly arranged on the placing rack (4), the movable block (42) is embedded in the movable groove, and the movable block (42) is in sliding fit with the movable groove.

8. The efficient paper feeding device for the printed matters as claimed in claim 7, wherein the pushing assembly (72) comprises an air cylinder (721) and a pushing plate (722), the air cylinder (721) is fixedly arranged on the supporting frame (2), the telescopic end of the air cylinder (721) penetrates through the supporting frame (2) and is in sliding fit with the supporting frame (2), and the pushing plate (722) is fixedly arranged on the telescopic end.

Images