阅读说明：本技术 一种ps板材生产用挤出成型设备 (Extrusion moulding equipment is used in production of PS panel ) 是由 胡东 温广明 于 2021-03-02 设计创作，主要内容包括：本发明涉及一种挤出成型设备,尤其涉及一种PS板材生产用挤出成型设备。本发明提供一种安全系数较高、实现自动运动颗粒原料和自动挤压成型的PS板材生产用挤出成型设备。一种PS板材生产用挤出成型设备,包括：第一支撑架,两个第一支撑架之间连接有两个第一连接架；驱动机构,第一支撑架与第一连接架之间设有驱动机构；托板,驱动机构上滑动式设有托板；下压机构,两个第一支撑架之间设有下压机构；压块,下压机构上滑动式设有压块。本发明通过电机输出轴带动丝杆转动,丝杆带动托板向前运动,托板对颗粒原料进行运送,实现托板运送颗粒原料效果。(The invention relates to extrusion molding equipment, in particular to extrusion molding equipment for producing a PS plate. The invention provides extrusion molding equipment for producing a PS plate, which has higher safety coefficient and realizes automatic movement of particle raw materials and automatic extrusion molding. An extrusion molding apparatus for producing a PS sheet, comprising: the two first supporting frames are connected with two first connecting frames; the driving mechanism is arranged between the first support frame and the first connecting frame; the supporting plate is arranged on the driving mechanism in a sliding manner; the pressing mechanism is arranged between the two first support frames; the pressing block is arranged on the downward pressing mechanism in a sliding mode. According to the invention, the screw rod is driven to rotate by the motor output shaft, the screw rod drives the supporting plate to move forwards, and the supporting plate conveys granular raw materials, so that the effect of conveying the granular raw materials by the supporting plate is realized.)

1. An extrusion molding equipment is used in production of PS panel, characterized by includes:

the device comprises first support frames (1), wherein two first connecting frames (2) are connected between the two first support frames (1);

the driving mechanism (5) is arranged between the first support frame (1) and the first connecting frame (2);

the supporting plate (3) is arranged on the driving mechanism (5) in a sliding manner;

the pressing mechanism (6) is arranged between the two first supporting frames (1);

the pressing block (4) is arranged on the pressing mechanism (6) in a sliding mode.

2. The extrusion molding apparatus for PS sheet production according to claim 1, wherein the driving mechanism (5) comprises:

the first connecting frame (2) is provided with a first supporting frame (51);

the motor (52) is mounted at the top of the second support frame (51);

the upper parts of the two first supporting frames (1) are respectively provided with a first sliding rail (53), and the first sliding rails (53) are connected with the supporting plate (3) in a sliding manner;

the output shaft of the motor (52) is connected with the screw rod (54), the screw rod (54) is connected with the first connecting frame (2) in a rotating mode, and the screw rod (54) is in threaded connection with the supporting plate (3).

3. The extrusion molding apparatus for PS sheet production according to claim 2, wherein the pressing mechanism (6) comprises:

the middle parts of the outer sides of the two first supporting frames (1) are respectively provided with a third supporting frame (61);

the upper parts of the two third supporting frames (61) are respectively provided with two second sliding rails (62);

the lower pressing frame (63) is connected among the four second sliding rails (62) in a sliding manner;

the four second sliding rails (62) are respectively wound with the first springs (64), and two ends of each first spring (64) are respectively connected with the second sliding rails (62) and the lower pressing frame (63);

the top of the lower pressing frame (63) is provided with a fourth supporting frame (65), and the fourth supporting frame (65) is connected with the pressing block (4) in a sliding manner;

the middle part of the pressing block (4) is provided with a second connecting frame (66);

the middle part of the lower side of the lower pressing frame (63) is provided with a third connecting frame (67);

the air cylinder (68) is mounted on the third connecting frame (67), and the telescopic rod of the air cylinder (68) is connected with the second connecting frame (66);

the two sides of the pressing block (4) are wound with the second springs (69), and two ends of each second spring (69) are connected with the pressing block (4) and the fourth supporting frame (65) respectively.

4. The extrusion molding apparatus for producing PS board according to claim 3, further comprising an auxiliary mechanism (7), wherein the auxiliary mechanism (7) comprises:

the two first support frames (1) are respectively provided with two fifth support frames (71);

a third slide rail (72) is connected between the upper parts of the two fifth support frames (71) on the same side;

the fourth connecting frames (73), the two third sliding rails (72) are both provided with the fourth connecting frames (73) in a sliding way;

the upper parts of the two fourth connecting frames (73) are respectively provided with a first wedge block (74);

the fifth connecting frames (75) are arranged on the two sides of the lower pressing frame (63);

and the second wedge blocks (76) are arranged on the two fifth connecting frames (75), and the second wedge blocks (76) are matched with the first wedge blocks (74).

5. The extrusion molding apparatus for producing PS board according to claim 4, wherein the feeding mechanism (8) comprises:

the first sliding block (81) is connected between the two first sliding rails (53) in a sliding manner;

the two first sliding rails (53) are respectively wound with the third spring (82), and two ends of the third spring (82) are respectively connected with the first sliding rails (53) and the first sliding block (81);

and the sixth connecting frame (83), the sixth connecting frame (83) is arranged on both sides of the lower part of the first sliding block (81), and the sixth connecting frame (83) is connected with the fourth connecting frame (73).

6. The extrusion molding equipment for producing the PS plate according to claim 5, further comprising a self-locking mechanism (9), wherein the self-locking mechanism (9) comprises:

the first limiting blocks (91) are arranged on two sides of the bottom of the first sliding block (81);

the two first support frames (1) are respectively provided with two fourth sliding rails (92);

a second limiting block (93) is connected between the two fourth sliding rails (92) on the same side in a sliding manner, and the second limiting block (93) is matched with the first limiting block (91);

the fourth springs (94) are wound on the four fourth sliding rails (92), and two ends of each fourth spring (94) are connected with the first support frame (1) and the second limiting block (93) respectively.

7. The extrusion molding equipment for producing the PS plate according to claim 6, further comprising a linkage mechanism (10), wherein the linkage mechanism (10) comprises:

the third wedge blocks (101) are arranged on two sides of the bottom of the supporting plate (3);

a seventh support frame (102), wherein the seventh support frame (102) is connected between the two second limit blocks (93);

and the third limiting blocks (103) are arranged on the two sides of the seventh supporting frame (102), and the third limiting blocks (103) are matched with the third wedge blocks (101).

8. The extrusion molding equipment for producing the PS plate according to claim 1, wherein the material of the pressing block (4) is alloy steel.

Technical Field

The invention relates to extrusion molding equipment, in particular to extrusion molding equipment for producing a PS plate.

Background

The PS plate is made of polystyrene as main raw material through extrusion, can be freely colored, is odorless, tasteless and nontoxic, cannot cause fungus growth, has the advantages of good rigidity, insulation and printability and the like, and is mainly used in the industries of packaging, container equipment, daily decoration, common electrical appliances, buildings and the like.

Patent application CN210679533U, it is 20200605 to disclose a production PS board's extrusion moulding device, which comprises a base, the extruder, the feeder hopper, the hot plate, including a motor, an end cap, a controller, and a cover plate, the motor, the work box, extrusion tooling and extrusion nozzle etc, pour the granule into in the feeder hopper, the granule drops in the work box through the feeder hopper, the user opens the hot plate, the hot plate heats the granule, make the granule turn into solution, solution flows into extrusion tooling again, starter motor afterwards, the motor drives the operation of extrusion nozzle, extrusion nozzle extrudees the granule solution on the extrusion tooling, make solution condense into the board type, however this equipment is when extrudeing granule solution, no object carries out the check to granule solution, make granule solution splash easily on one's body to the user.

Therefore, the extrusion molding equipment for producing the PS plate is designed, which has higher safety coefficient and can realize automatic movement of particle raw materials and automatic extrusion molding.

Disclosure of Invention

In order to overcome the defects that the traditional extrusion equipment is low in safety factor and cannot realize automatic movement of particle raw materials and automatic extrusion forming, the invention provides the extrusion forming equipment for producing the PS plate, which is high in safety factor and can realize automatic movement of the particle raw materials and automatic extrusion forming.

The invention is realized in this way, an extrusion molding device for producing PS plates comprises:

the two first supporting frames are connected with two first connecting frames;

the driving mechanism is arranged between the first support frame and the first connecting frame;

the supporting plate is arranged on the driving mechanism in a sliding manner;

the pressing mechanism is arranged between the two first support frames;

the pressing block is arranged on the downward pressing mechanism in a sliding mode.

Optionally, the drive mechanism comprises:

the first connecting frame is provided with a first supporting frame;

the motor is mounted at the top of the second support frame;

the upper parts of the two first supporting frames are respectively provided with a first sliding rail, and the first sliding rails are connected with the supporting plate in a sliding manner;

the screw rod is connected with the motor output shaft, the screw rod is connected with the first connecting frame in a rotating mode, and the screw rod is connected with the supporting plate in a threaded mode.

Optionally, the pressing mechanism comprises:

the middle parts of the outer sides of the two first supporting frames are respectively provided with a third supporting frame;

the upper parts of the two third supporting frames are respectively provided with two second sliding rails;

the four second sliding rails are connected with the lower pressing frame in a sliding manner;

the four second sliding rails are respectively wound with a first spring, and two ends of the first spring are respectively connected with the second sliding rails and the lower pressing frame;

the top of the lower pressing frame is provided with a fourth support frame which is connected with the pressing block in a sliding manner;

the middle part of the pressing block is provided with a second connecting frame;

the middle part of the lower side of the lower pressing frame is provided with a third connecting frame;

the cylinder is arranged on the third connecting frame, and the telescopic rod of the cylinder is connected with the second connecting frame;

and the two sides of the pressing block are wound with the second springs, and the two ends of each second spring are respectively connected with the pressing block and the fourth supporting frame.

As a preferable aspect of the present invention, the assist mechanism includes:

the two first supporting frames are provided with two fifth supporting frames;

the upper parts of the two fifth supporting frames on the same side are connected with a third sliding rail;

the two third sliding rails are provided with a third connecting frame in a sliding manner;

the upper parts of the two fourth connecting frames are provided with first wedge blocks;

the fifth connecting frames are arranged on the two sides of the lower pressing frame;

and the second wedge blocks are arranged on the two fifth connecting frames and matched with the first wedge blocks.

As a preferable technical solution of the present invention, the feeding mechanism includes:

the first sliding block is connected between the two first sliding rails in a sliding manner;

the two first sliding rails are wound with the first springs, and two ends of each first spring are connected with the first sliding rail and the first sliding block respectively;

and the sixth connecting frames are arranged on two sides of the lower part of the first sliding block and are connected with the fourth connecting frame.

As a preferable technical solution of the present invention, the self-locking mechanism includes:

the first limiting blocks are arranged on two sides of the bottom of the first sliding block;

two fourth sliding rails are arranged on the two first supporting frames;

a second limiting block is connected between the two fourth sliding rails on the same side in a sliding manner and matched with the first limiting block;

and the four fourth sliding rails are wound with fourth springs, and two ends of each fourth spring are connected with the first support frame and the second limiting block respectively.

As a preferable aspect of the present invention, the link mechanism includes:

the two sides of the bottom of the supporting plate are provided with third wedge blocks;

the seventh supporting frame is connected between the two second limiting blocks;

and the third limiting blocks are arranged on two sides of the seventh supporting frame and matched with the third wedge blocks.

As a preferred technical scheme of the invention, the briquetting material is alloy steel.

The invention provides extrusion molding equipment for producing a PS plate. The method has the following beneficial effects:

1. according to the invention, the screw rod is driven to rotate by the motor output shaft, the screw rod drives the supporting plate to move forward, and the supporting plate conveys granular raw materials, so that the effect of conveying the granular raw materials by the supporting plate is realized;

2. the pressing block is driven to move downwards through the second connecting frame, the second spring is stretched, and the pressing block extrudes the granular raw materials on the supporting plate, so that the granular raw materials are extruded into a plate shape, and the effect of extruding the granular raw materials into the plate shape by the pressing block is realized;

3. the first limiting block is prevented from moving forwards by the second limiting block, so that the second limiting block clamps the first limiting block, and the effect that the second limiting block prevents the first limiting block from moving is achieved;

4. according to the invention, the fourth spring is compressed, so that the second limiting block is separated from the first limiting block, the clamping of the second limiting block on the first limiting block is released, and the effect of the seventh supporting frame assisting the second limiting block in releasing the clamping of the first limiting block is realized.

Drawings

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

Fig. 2 is a schematic perspective view of the driving mechanism of the present invention.

Fig. 3 is a schematic perspective view of the pressing mechanism according to the present invention.

Fig. 4 is a schematic perspective view of the auxiliary mechanism of the present invention.

Fig. 5 is a schematic perspective view of the feeding mechanism of the present invention.

Fig. 6 is a schematic perspective view of the self-locking mechanism of the present invention.

Fig. 7 is a schematic perspective view of the linkage mechanism of the present invention.

The parts are labeled as follows: 1_ first support frame, 2_ first connecting frame, 3_ pallet, 4_ press block, 5_ driving mechanism, 51_ second support frame, 52_ motor, 53_ first slide rail, 54_ screw rod, 6_ press mechanism, 61_ third support frame, 62_ second slide rail, 63_ press frame, 64_ first spring, 65_ fourth support frame, 66_ second connecting frame, 67_ third connecting frame, 68_ cylinder, 69_ second spring, 7_ auxiliary mechanism, 71_ fifth support frame, 72_ third slide rail, 73_ fourth connecting frame, 74_ first wedge block, 75_ fifth connecting frame, 76_ second wedge block, 8_ feeding mechanism, 81_ first slide block, 82_ third spring, 83_ sixth connecting frame, 9_ self-locking mechanism, 91_ first limit block, 92_ fourth slide rail, 93_ second limit block, 94_ fourth spring, 10_ first limit block, 101_ third wedge block, 102_ seventh supporting frame, 103_ third limiting block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a PS panel production is with extrusion moulding equipment, including first support frame 1, first link 2, layer board 3, briquetting 4, actuating mechanism 5 and pushing down mechanism 6, be connected with two first links 2 between two first support frames 1, be equipped with actuating mechanism 5 between first support frame 1 and the first link 2, the gliding style is equipped with layer board 3 on the actuating mechanism 5, be equipped with pushing down mechanism 6 between two first support frames 1, the gliding style is equipped with briquetting 4 on pushing down mechanism 6.

The driving mechanism 5 comprises a second support frame 51, a motor 52, first sliding rails 53 and a screw rod 54, the second support frame 51 is arranged on the front wall of the first connecting frame 2 on the front side, the motor 52 is installed at the top of the second support frame 51, the first sliding rails 53 are arranged on the upper portions of the two first support frames 1, the first sliding rails 53 are connected with the supporting plate 3 in a sliding manner, the screw rod 54 is connected with an output shaft of the motor 52, the screw rod 54 is connected with the first connecting frame 2 in a rotating manner, and the screw rod 54 is connected with the supporting plate 3 in a threaded manner.

The pressing mechanism 6 comprises a third support frame 61, a second slide rail 62, a pressing frame 63, a first spring 64, a fourth support frame 65, a second connecting frame 66, a third connecting frame 67, a cylinder 68 and a second spring 69, the third support frame 61 is arranged in the middle of the outer side of each of the two first support frames 1, the two second slide rails 62 are arranged on the upper portions of the two third support frames 61, the pressing frame 63 is connected between the four second slide rails 62 in a sliding manner, the first spring 64 is wound on each of the four second slide rails 62, the two ends of each first spring 64 are respectively connected with the second slide rails 62 and the pressing frame 63, the fourth support frame 65 is arranged on the top of the pressing frame 63, the fourth support frame 65 is connected with the pressing block 4 in a sliding manner, the second connecting frame 66 is arranged in the middle of the front side of the pressing block 4, the third connecting frame 67 is arranged in the middle of the lower side of the front wall 63 of the pressing frame, the cylinder 68 is arranged on the third connecting frame 67, the left side and the right side of the press block 4 are wound with second springs 69, and two ends of each second spring 69 are respectively connected with the press block 4 and the fourth supporting frame 65.

Still including auxiliary mechanism 7, auxiliary mechanism 7 is including fifth support frame 71, third slide rail 72, fourth link 73, first wedge 74, fifth link 75 and second wedge 76, all be equipped with two fifth support frames 71 on two first support frames 1, be connected with third slide rail 72 between two fifth support frame 71 upper portions of homonymy, all slidingtype is equipped with fourth link 73 on two third slide rails 72, two fourth link 73 upper portions all are equipped with first wedge 74, it all is equipped with fifth link 75 to push down the frame 63 left and right sides, all be equipped with second wedge 76 on two fifth link 75, second wedge 76 and the cooperation of first wedge 74.

The feeding mechanism 8 comprises a first sliding block 81, a third spring 82 and a sixth connecting frame 83, the first sliding block 81 is connected between the two first sliding rails 53 in a sliding manner, the third spring 82 is wound on the two first sliding rails 53, two ends of the third spring 82 are respectively connected with the first sliding rails 53 and the first sliding block 81, the sixth connecting frame 83 is arranged on the left side and the right side of the lower portion of the first sliding block 81, and the sixth connecting frame 83 is connected with the fourth connecting frame 73.

Still including self-locking mechanism 9, self-locking mechanism 9 is including first stopper 91, fourth slide rail 92, second stopper 93 and fourth spring 94, the first slider 81 bottom left and right sides all is equipped with first stopper 91, all be equipped with two fourth slide rails 92 on two first support frames 1, slidingtype connection has second stopper 93 between two fourth slide rails 92 of homonymy, second stopper 93 cooperates with first stopper 91, all around having fourth spring 94 on four fourth slide rails 92, fourth spring 94 both ends are connected with first support frame 1 and second stopper 93 respectively.

Still including link gear 10, link gear 10 is including third wedge 101, seventh support frame 102 and third stopper 103, and the 3 bottom left and right sides of layer board all are equipped with third wedge 101, are connected with seventh support frame 102 between two second stoppers 93, and the seventh support frame 102 left and right sides all is equipped with third stopper 103, and third stopper 103 cooperates with third wedge 101.

The working principle of the invention is that when people want to make PS plates, the extrusion molding equipment for producing PS plates can be used, firstly, a user pours granular raw materials into a supporting plate 3, then a driving mechanism 5 is started, the driving mechanism 5 drives the supporting plate 3 to move forwards, when the supporting plate 3 moves forwards to the position below a pressing block 4, the user pushes a pressing mechanism 6 downwards, the pressing mechanism 6 drives the pressing block 4 to move downwards, after the pressing mechanism 6 moves downwards to be contacted with the supporting plate 3, the user starts the pressing mechanism 6, the pressing mechanism 6 drives the pressing block 4 to move downwards, the pressing block 4 extrudes the granular raw materials on the supporting plate 3, so that the granular raw materials are extruded into a plate shape, after the granular raw materials are extruded, the user controls the pressing mechanism 6 to drive the pressing block 4 to move upwards to a recovery position, the pressing mechanism 6 is released, so that the pressing mechanism 6 moves upwards to the recovery position, the user controls the driving mechanism 5 to rotate reversely, the driving mechanism 5 drives the supporting plate 3 to move backwards, the driving mechanism 5 and the pressing mechanism 6 are closed, and the actions are stopped.

After the user pours the granule raw materials into layer board 3, the user starts motor 52, motor 52 output shaft drives lead screw 54 and rotates, lead screw 54 drives layer board 3 forward motion, layer board 3 transports the granule raw materials, realize that layer board 3 transports the granule raw materials effect, layer board 3 transports the granule raw materials and accomplishes the back, the user controls motor 52 output shaft antiport, motor 52 output shaft drives lead screw 54 antiport, lead screw 54 drives layer board 3 backward motion to the recovery normal position, close motor 52, above action stops.

After the supporting plate 3 conveys the granular raw materials to the lower pressing frame 63, a user pushes the lower pressing frame 63 downwards, the lower pressing frame 63 drives the fourth supporting frame 65 to move downwards, the lower pressing frame 63 drives the third connecting frame 67 to move downwards, the third connecting frame 67 drives the air cylinder 68 to move downwards, the fourth supporting frame 65 drives the pressing block 4 to move downwards, the pressing block 4 drives the second connecting frame 66 to move downwards, the pressing block 4 drives the second spring 69 to move downwards, the first spring 64 is stretched, the lower pressing frame 63 stops moving downwards after the lower pressing frame 63 moves downwards to be contacted with the supporting plate 3, then the user starts the air cylinder 68, the telescopic rod of the air cylinder 68 is shortened downwards, the telescopic rod of the air cylinder 68 drives the second connecting frame 66 to move downwards, the second connecting frame 66 drives the pressing block 4 to move downwards, the second spring 69 is stretched, the pressing block 4 extrudes the granular raw materials on the supporting plate 3 to enable the granular raw materials to be in a plate shape, realize 4 extrusion granule raw materials of briquetting and become board type effect, granule raw materials extrusion accomplishes the back, the user controls the upwards extension of cylinder 68 telescopic link, cylinder 68 telescopic link drives second link 66 and the 4 upward movements of briquetting, second spring 69 resets, then close cylinder 68, the user loosens after that and pushes down frame 63, first spring 64 resets, thereby drive and push down frame 63 upward movement, it drives briquetting 4 to push down frame 63, fourth support frame 65, second link 66, third link 67, cylinder 68 and second spring 69 upward movement resume the normal position.

After the supporting plate 3 moves to the lower part of the lower pressing frame 63, the user pushes the fourth connecting frame 73 forward, the fourth connecting frame 73 drives the first wedge-shaped block 74 to move, after the first wedge-shaped block 74 moves to contact with the second wedge-shaped block 76, thereby driving the second wedge-shaped block 76 to move downwards, the second wedge-shaped block 76 driving the fifth link 75 to move downwards, the fifth link 75 driving the lower pressing frame 63 to move downwards, the first spring 64 being stretched, so that the lower pressing frame 63 contacts the supporting plate 3, the fifth connecting frame 75 assists the lower pressing frame 63 to contact the supporting plate 3, when the user wants to detach the pressing frame 63 from the supporting plate 3, the user pushes the fourth connecting frame 73 backward, the fourth connecting frame 73 drives the first wedge block 74 to move backward, the first wedge block 74 is detached from the second wedge block 76, the first spring 64 is reset, thereby moving the second wedge block 76, the fifth link 75 and the lower press frame 63 upward to restore the original position.

When the supporting plate 3 moves forwards, the supporting plate 3 is separated from the first sliding block 81, the third spring 82 in a compressed state is reset, so that the first sliding block 81 is driven to move forwards, the first sliding block 81 drives the sixth connecting frame 83 to move forwards, the sixth connecting frame 83 drives the fourth connecting frame 73 and the first wedge-shaped block 74 to move forwards, after the first sliding block 81 moves forwards to be in contact with the supporting plate 3, the third spring 82 stops resetting, if the supporting plate 3 continues to move forwards, the third spring 82 continues to reset, the effect of the sixth connecting frame 83 for assisting the fourth connecting frame 73 to move is achieved, when the supporting plate 3 moves backwards, the supporting plate 3 is in contact fit with the first sliding block 81, so that the first sliding block 81 is driven to move backwards, the first sliding block 81 drives the sixth connecting frame 83, the fourth connecting frame 73 and the first wedge-shaped block 74 to move backwards, and the third spring 82 is compressed.

When the supporting plate 3 moves to the lower part of the lower pressing frame 63, the user pushes the second limiting block 93 downwards, the fourth spring 94 is compressed, the second limiting block 93 is separated from the first limiting block 91, the third spring 82 in the compressed state is reset, so that the first sliding block 81 is driven to move forwards, the first sliding block 81 stops moving forwards after the first sliding block 81 moves forwards to be contacted with the supporting plate 3, then the user releases the second limiting block 93, the fourth spring 94 is reset, so that the second limiting block 93 is driven to move upwards to the recovery position, when the first sliding block 81 moves backwards, the first sliding block 81 drives the first limiting block 91 to move backwards, the first limiting block 91 moves backwards to be contacted with the second limiting block 93, so that the second limiting block 93 is driven to move downwards, the fourth spring 94 is compressed, the first limiting block 91 continues to move backwards to be separated from the second limiting block 93, and the fourth spring 94 is reset, thereby drive second stopper 93 upward movement and resume the normal position, when first stopper 91 forward motion, second stopper 93 blocks first stopper 91 and moves forward for second stopper 93 carries out the screens to first stopper 91, realizes that second stopper 93 blocks first stopper 91 motion effect.

When the supporting plate 3 moves forwards, the supporting plate 3 drives the third wedge 101 to move forwards, the third wedge 101 moves forwards to be matched with the third limiting block 103 in a contact mode, so that the third limiting block 103 is driven to move downwards, the third limiting block 103 drives the seventh supporting frame 102 to move downwards, the seventh supporting frame 102 drives the second limiting block 93 to move downwards, the fourth spring 94 is compressed, the second limiting block 93 is separated from the first limiting block 91, clamping of the second limiting block 93 to the first limiting block 91 is relieved, the seventh supporting frame 102 assists the second limiting block 93 to relieve the clamping effect of the first limiting block 91, when the third wedge 101 moves backwards, the third wedge 101 is separated from the third limiting block 103, the fourth spring 94 resets, and the second limiting block 93, the third limiting block 103 and the seventh supporting frame 102 are driven to move upwards to return to the original position.

The technical principle of the embodiment of the present invention is described above in conjunction with the specific embodiments. The description is only intended to explain the principles of embodiments of the invention and should not be taken in any way as limiting the scope of the embodiments of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.