CN111265367A

CN111265367A - Stretcher convenient to slope transport

Info

Publication number: CN111265367A
Application number: CN202010229606.8A
Authority: CN
Inventors: 朱林详
Original assignee: Chunan Huancheng Medical Devices Co Ltd
Current assignee: Chunan Huancheng Medical Devices Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-06-12

Abstract

The invention discloses a stretcher convenient for slope transportation, which comprises a first supporting block, wherein the front end and the rear end of the upper end surface of the first supporting block are symmetrically and fixedly provided with supporting rods, canvas is fixedly arranged between the front supporting rod and the rear supporting rod, the left side and the right side of the first supporting block are provided with state switching devices, the first supporting block is internally provided with a switching control device, and the supporting rods are provided with protection devices. The turnover rod can provide a supporting function for the stretcher, does not influence wounded persons, and is slightly influenced by ground factors.

Description

Stretcher convenient to slope transport

Technical Field

The invention relates to the technical field of medical rescue instruments, in particular to a stretcher convenient for slope transportation.

Background

The stretcher is a tool for transferring sick and wounded by rescue workers, most of the existing stretchers only have simple moving or protecting functions, and if the stretchers meet slope road sections such as a slope or a floor or the height difference of the people lifting the stretcher is too large in the using process, the stability of the wounded and the stretcher cannot be kept, so that the people lifting the stretcher are more strenuous, the wounded can slide off the stretcher in the transferring process to cause secondary injury, and the pain of the wounded is increased. The present invention sets forth a device that solves the above problems.

Disclosure of Invention

The technical problem is as follows:

if present stretcher meets slope highway sections such as ramp or building bottom in the use, or the personnel height gap of lifting the stretcher is too big, can't keep wounded and stretcher steady, more hard to the people who lifts the stretcher, still can the wounded from the stretcher landing cause secondary injury.

In order to solve the above problems, the present embodiment provides a stretcher convenient for slope transportation, which includes a first supporting block, wherein the front end and the rear end of the upper end surface of the first supporting block are symmetrically and fixedly provided with supporting rods, canvas is fixedly provided between the front supporting rod and the rear supporting rod, the left side and the right side of the first supporting block are provided with a state switching device, the state switching device includes a second supporting block fixedly provided between the front supporting rod and the rear supporting rod and symmetrically provided at the left end and the right end of the lower end surface of the supporting rod, a third supporting block is fixedly provided between the lower end surfaces of the front supporting rod and the rear supporting rod and at one side of the second supporting block close to the first supporting block, a fixing shaft is fixedly provided between the second supporting block and the third supporting block at the same side, the fixing shaft is rotatably provided with a lifting rod, one side end surface of the lifting rod far away from the first supporting block is fixedly provided with a handle at one end far, be equipped with switching control device in the first supporting block, switching control device is including locating coiling chamber in the first supporting block, the fixed motor that is equipped with in left and right symmetrical position in the coiling chamber upper wall, motor lower extreme power is connected with the winding bobbin, and when the slope highway section the motor provides power for the conversion of stretcher state, be equipped with protection device on the vaulting pole, protection device includes that front and back symmetry and fixed locate the vaulting pole is kept away from the fixed block of a side end face mutually, be equipped with the second upset groove on the fixed block, can the pivoted be equipped with the second upset pole between the wall about the second upset groove, the fixed guardrail that is equipped with of second upset pole lower extreme, when needing the second upset pole can upwards overturn and ensure wounded's safety. Preferably, the switching control device comprises a first turnover groove arranged at the bilateral symmetry position of the lower end face of the support rod, a first turnover rod is arranged in the first turnover groove in a rotating mode, a first spring is fixedly connected between the upper wall of the first turnover groove, two sets of first slider cavities are arranged in the front wall and the rear wall of the winding cavity in a bilateral symmetry mode, a first slider is arranged in the first slider cavity in a front-back sliding mode, a tooth rod cavity is arranged in the first slider cavity in a front-back sliding mode, a tooth rod is arranged in the tooth rod cavity in a vertical sliding mode and provided with a tooth-shaped rod, the tooth rod is fixedly connected with a second spring between the inner walls of the tooth rod cavity, the tooth rod is meshed with the first slider and prevents the first slider from sliding when the tooth rod is located at the lower limit position, the winding drum is close to the first slider, a first pull line is fixedly connected between the side end faces of the winding cavity, the first slider is far away from a side end face of the winding cavity and a first turnover rod One end of one side of the block is fixedly connected with a second pull wire.

Preferably, be equipped with the second slider chamber in the handle, the second slider intracavity can the horizontal slip be equipped with the second slider, the second slider with apart from nearest fixedly connected with third stay wire between the profile of tooth pole up end, second slider chamber upper wall intercommunication is equipped with the ascending first connecting groove of opening, the horizontal slip be equipped with the upper end in first connecting groove and extend to outer slide switch, slide switch lower extreme fixed connection in the second slider.

Preferably, be equipped with first spacing chamber in the new thick stick, the slidable first stopper that is equipped with in first spacing chamber, first spacing chamber is close to first supporting block one side inner wall intercommunication is equipped with the second spread groove that the opening is relative, the gliding connecting rod that is equipped with in the second spread groove, connecting rod one end fixed connection in first stopper, the connecting rod other end extends to outside and is equipped with the third spread groove, first upset pole is kept away from link up around the one end of first supporting block one side is equipped with the spacing groove, both ends fixed connection in the gag lever post of wall around the third spread groove around being equipped with of spacing inslot ability.

Preferably, the protection device comprises a torsion spring fixedly arranged between the front and rear end faces of the second turnover rod and the inner wall of the second turnover groove, an elastic rope is fixedly connected between one side end face of the second turnover rod away from the stay bar and the upper end face of the first turnover rod, a first clamping groove is arranged on one side end face of the second turnover rod away from the stay bar, a second clamping groove is communicated with the lower wall of the first clamping groove, a first clamping block cavity is communicated with the inner wall of the second turnover groove away from the stay bar, a first clamping block is arranged in the first clamping block cavity in a front-back sliding manner, a third spring is fixedly connected between the first clamping block and the first clamping block cavity, a second clamping block cavity with an upward opening is arranged on the upper end face of the first clamping block, a second clamping block is arranged in the second clamping block cavity in a vertical sliding manner, and a fourth spring is fixedly connected between the second clamping block and the inner wall of the fourth spring, and a fourth pull wire is fixedly connected between the lower end of the second fixture block and the left and right second slide blocks on the same side, when the second turnover rod is turned upwards to be vertical, one end of the first fixture block can extend into the first clamping groove, and one end of the second fixture block can extend into the second clamping groove.

Preferably, the upper wall of the first fixture block cavity is communicated with a push block cavity, the upper end of the second fixture block can extend into the push block cavity, a push block is arranged in the push block cavity in a manner of sliding up and down, a second limit cavity is communicated with the inner wall of the push block cavity, a second limiting block fixedly connected with the push block is arranged in the second limiting cavity in a manner of sliding up and down, a supporting rod cavity is communicated between the upper wall of the pushing block cavity and the fixed block, a supporting rod with one end capable of extending into the second turnover groove is arranged in the supporting rod cavity in a front-back sliding manner, a fifth spring is fixedly connected between the abutting rod and the inner wall of the abutting rod cavity, an abutting groove with a downward opening is arranged on the lower end surface of the abutting rod, the upper end of the push block can extend into the abutting groove, when the second turnover rod is turned upwards to be in a vertical state, the abutting rod is pushed back to the fifth spring, and the pushing block is pushed to slide downwards and push the second clamping block out of the pushing block cavity.

The invention has the beneficial effects that: the invention can adjust the positions of the handles at the left side and the right side as required when passing through a slope section, so that a horizontal height difference is formed between the handles at the left side and the right side, the horizontal state of the stretcher can be maintained without lifting the hand by a person lifting the stretcher, more strength is saved for the person lifting the stretcher while the wounded and the stretcher are ensured to move stably, and the guard bar can be automatically turned over to open or retract when the state is switched.

Drawings

For ease of illustration, the invention is described in detail by the following specific examples and figures.

Fig. 1 is a schematic view of the overall structure of a stretcher convenient for slope transportation according to the invention;

FIG. 2 is a sectional view taken in the direction "A-A" of FIG. 1;

FIG. 3 is a sectional view taken in the direction "B-B" of FIG. 1;

FIG. 4 is a cross-sectional view taken in the direction "C-C" of FIG. 2;

FIG. 5 is a cross-sectional view taken in the direction "D-D" of FIG. 2;

FIG. 6 is an enlarged schematic view of "E" of FIG. 3;

FIG. 7 is a sectional view taken in the direction "F-F" of FIG. 6

Fig. 8 is an enlarged schematic view of "G" of fig. 6.

Detailed Description

The invention will now be described in detail with reference to fig. 1-8, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a stretcher convenient for slope transportation, which is mainly applied to stably transferring wounded persons under the conditions of complex inclined terrains such as slope stairs and the like, and the invention is further explained by combining the attached drawings of the invention:

the stretcher convenient for slope transportation comprises a first supporting block 11, wherein the front end face and the rear end face of the upper end face of the first supporting block 11 are symmetrically and fixedly provided with supporting rods 12, canvas 66 is fixedly arranged between the front supporting rod 12 and the rear supporting rod 12, the left side and the right side of the first supporting block 11 are provided with state switching devices 101, each state switching device 101 comprises a second supporting block 13 which is fixedly arranged between the front supporting rod 12 and the rear supporting rod 12 and symmetrically arranged at the left end and the right end of the lower end face of the supporting rod 12, a third supporting block 14 is fixedly arranged between the lower end faces of the front supporting rod 12 and the rear supporting rod 12 and at one side of the second supporting block 13 close to the first supporting block 11, a fixed shaft 15 is fixedly arranged between the second supporting block 13 and the third supporting block 14 at the same side, a lifting lever 16 is rotatably arranged on the fixed shaft 15, the lifting lever 16 is far away from one side end face of the first supporting block 11, and a handle 17 is fixedly, be equipped with switching control device 102 in the first supporting block 11, switching control device 102 is including locating coiling chamber 21 in the first supporting block 11, the fixed motor 22 that is equipped with in bilateral symmetry position in coiling chamber 21 upper wall, motor 22 lower extreme power is connected with winding reel 23, and when the slope highway section motor 22 provides power for the conversion of stretcher state, be equipped with protection device 103 on the vaulting pole 12, protection device 103 includes that front and back symmetry and fixed locate vaulting pole 12 keeps away from a side end face's fixed block 43 mutually, be equipped with second upset groove 44 on fixed block 43, can the pivoted be equipped with second upset pole 45 between the wall about second upset groove 44, the fixed guardrail 46 that is equipped with of second upset pole 45 lower extreme, when needs second upset pole 45 can upwards overturn and ensure wounded's safety.

Beneficially, as detailed description is given below on the switching control device 102, the switching control device 102 includes a first turning groove 18 disposed at a left-right symmetric position on the lower end surface of the stay 12, a first turning rod 19 is rotatably disposed in the first turning groove 18, a first spring 20 is fixedly connected between the first turning rod 19 and the upper wall of the first turning groove 18, two sets of first slider cavities 24 are symmetrically disposed in the front and rear walls of the winding cavity 21, a first slider 25 is slidably disposed in the first slider cavity 24 in the front and rear directions, a rack cavity 26 is communicated with the upper wall of the first slider 25, a rack 27 is slidably disposed in the rack cavity 26 in the up-down direction, a second spring 28 is fixedly connected between the rack 27 and the inner wall of the rack cavity 26, and when the rack 27 is at the lower limit position, the rack is engaged with the first slider 25 and prevents the first slider 25 from sliding, the winding drum 23 and the first sliding block 25 are close to a first pull wire 29 fixedly connected between end faces of one side of the winding cavity 21, the first sliding block 25 is far away from the end face of one side of the winding cavity 21, and the first turnover rod 19 is far away from one end of one side of the first supporting block 11 and is fixedly connected with a second pull wire 30.

Beneficially, a second sliding block cavity 31 is arranged in the handle 17, a second sliding block 32 is arranged in the second sliding block cavity 31 and can slide left and right, a third pull wire 33 is fixedly connected between the second sliding block 32 and the upper end face of the tooth-shaped rod 27 closest to the second sliding block cavity, a first connecting groove 34 with an upward opening is arranged on the upper wall of the second sliding block cavity 31 in a communicating manner, a sliding switch 35 with an upper end extending outwards is arranged in the first connecting groove 34 and can slide left and right, and the lower end of the sliding switch 35 is fixedly connected to the second sliding block 32.

Beneficially, be equipped with first spacing chamber 36 in the lifting lever 16, slidable is equipped with first stopper 37 in the first spacing chamber 36, first spacing chamber 36 is close to first supporting block 11 one side inner wall intercommunication is equipped with the relative second spread groove 38 of opening, the gliding connecting rod 39 that is equipped with in second spread groove 38, connecting rod 39 one end fixed connection in first stopper 37, the connecting rod 39 other end extends to outside and is equipped with third spread groove 40, first upset pole 19 is kept away from the one end of first supporting block 11 one side is link up around being equipped with spacing groove 41, both ends fixed connection in the spacing pole 42 of wall around being equipped with of spacing groove 41 slidable around being equipped with before third spread groove 40.

Advantageously, as will be described in detail below, the protection device 103 includes a torsion spring 47 fixedly disposed between the front and rear end surfaces of the second flipping bar 45 and the inner wall of the second flipping bar 44, an elastic cord 48 is fixedly connected between the end surface of the second flipping bar 45 away from the brace 12 and the upper end surface of the first flipping bar 19, a first engaging groove 49 is disposed on the end surface of the second flipping bar 45 away from the brace 12, a second engaging groove 50 is disposed in communication with the lower wall of the first engaging groove 49, a first engaging block cavity 51 is disposed in communication with the inner wall of the second flipping bar 44 away from the brace 12, a first engaging block 52 is slidably disposed in the first engaging block cavity 51, a third spring 53 is fixedly connected between the first engaging block 52 and the first engaging block cavity 51, a second engaging block cavity 54 with an upward opening is disposed on the upper end surface of the first engaging block 52, a second clamping block 55 is arranged in the second clamping block cavity 54 in a vertically sliding manner, a fourth spring 56 is fixedly connected between the second clamping block 55 and the inner wall of the fourth spring 56, a fourth pull wire 65 is fixedly connected between the lower end of the second clamping block 55 and the left and right second sliding blocks 32 on the same side, when the second turning rod 45 is turned upwards to be vertical, one end of the first clamping block 52 can extend into the first clamping groove 49, and one end of the second clamping block 55 can extend into the second clamping groove 50.

Beneficially, the upper wall of the first fixture block cavity 51 is provided with a push block cavity 57 in a communicating manner, the upper end of the second fixture block 55 can extend into the push block cavity 57, a push block 58 can slide up and down in the push block cavity 57, the inner wall of the push block cavity 57 is provided with a second limit cavity 59 in a communicating manner, the second limit cavity 59 can slide up and down in a second limit block 60 fixedly connected to the push block 58, a support rod cavity 61 is provided between the upper wall of the push block cavity 57 and the fixed block 43 in a communicating manner, the support rod cavity 61 is provided with a support rod 62, one end of which can extend into the second turnover groove 44 in a forward and backward sliding manner, a fifth spring 63 is fixedly connected between the inner wall of the support rod cavity 61 and the support rod 62, the lower end surface of the support rod 62 is provided with a support groove 64 with a downward opening, the upper end of the push block 58 can extend into the support groove 64, when the second turnover rod 45 is turned upwards to a vertical state, when the pressing rod 62 is pushed back to the fifth spring 63, the pushing block 58 is pushed to slide down and push the second latch 55 out of the pushing block cavity 57.

The following detailed description of the usage steps of the stretcher for facilitating slope transportation according to the present invention is provided with reference to fig. 1 to 8:

at the beginning, the end of the lifting lever 16 far from the fixed shaft 15 is located at the upper limit position and abuts against the support rod 12, the first overturning rod 19 is located at the upper limit position, the first spring 20 is in a stretched state, the first slider 25 is located at the limit position on the side far from the winding cavity 21, the toothed rod 27 is located at the lower limit position, the second spring 28 is located at the stretched state, the elastic rope 48 is in a loose state, the first clamping block 52 is received in the first clamping block cavity 51, the third spring 53 is in a compressed state, the upper end of the second clamping block 55 extends into the pushing block cavity 57, the pushing block 58 is located at the upper limit position, the upper end of the pushing block extends into the abutting groove 64, and one end of the abutting rod 62 extends into the second overturning groove 44.

When a person passing through an inclined road such as a slope or a stair pushes the second slide block 32 to a side far away from the first support block 11 through the slide switch 35, the second slide block 32 pulls the toothed rod 27 to slide upwards through the third pull wire 33, the first slide block 25 is unlocked to be in a slidable state, the motor 22 on the same side is started to drive the winding drum 23 to rotate, the winding drum 23 winds the first pull wire 29 and further pulls the first slide blocks 25 on the front side and the rear side to slide towards a side close to the winding cavity 21, the first slide blocks 25 pull the first turning rod 19 on the same side to turn downwards through the second pull wire 30, the connecting rod 39 and the first limiting block 37 drive one end of the lifting rod 16 far away from the fixed shaft 15 to turn downwards to a proper position when the first turning rod 19 turns downwards, and the slide switch 35 is released after the adjustment is finished, under the action of the second spring 28, the toothed bar 27 slides downwards to clamp the first sliding block 25 again, and then the left handle 17 and the right handle 17 form a horizontal height difference, so that the horizontal state of the stay bar 12 can be kept when the stretcher moves on a slope road section, and further the wounded and the stretcher are kept stable, when the stretcher moves to a flat road again, the toothed bar 27 is pulled by the sliding switch 35 to slide upwards to unlock the first sliding block 25, and then the first turnover bar 19 is turned upwards under the action of the first spring 20 to drive the lifting bar 16 to reset.

When the usage state of the slope is switched, the first overturning rod 19 which overturns strains the elastic rope 48 and pulls the second overturning rod 45 to overturn upwards to the vertical state through the elastic rope 48, when the second overturning rod 45 overturns to the vertical state, the abutting rod 62 is pushed back into the fifth spring 63, the push block 58 is pushed to slide downwards and push the second clamping block 55 out of the push block cavity 57, then the first clamping block 52 extends into the first clamping groove 49 under the action of the third spring 53, the second clamping block 55 extends into the second clamping groove 50 to be clamped under the action of the fourth spring 56, the vertical state of the second overturning rod 45 is locked, the safety of a wounded person on the stretcher is ensured, when the sliding switch 35 is pulled by switching back to the usage state of a flat road surface, the second clamping block 32 firstly pulls the second clamping block 55 back into the second clamping block cavity 54 through the fourth pull wire 65, then pulls the first clamping block 52 back into the first clamping block cavity 51, and at the moment, the first overturning rod 19 returns to the elastic rope 48 upwards, the pressing rod cavity 61 is reset under the action of the pressing rod 62 to push the second turnover rod 45 to turn downwards and reset, and then the second clamping block 55 is reset and clamped in the pushing block cavity 57 under the action of the fourth spring 56.

In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.

Claims

1. The utility model provides a stretcher convenient to slope transport, includes first bracer, both ends symmetry and fixed vaulting pole that is equipped with around the first bracer up end, front and back fixed canvas that is equipped with between the vaulting pole, the first bracer left and right sides is equipped with state auto-change over device, its characterized in that: the state switching device comprises a second supporting block which is fixedly arranged between the supporting rods at the front side and the rear side and symmetrically arranged at the left end and the right end of the lower end surface of the supporting rod, a third supporting block is fixedly arranged between the lower end surfaces of the supporting rods at the front side and the rear side and at one side of the second supporting block close to the first supporting block, a fixed shaft is fixedly arranged between the second supporting block and the third supporting block at the same side, a lifting rod is rotatably arranged on the fixed shaft, a handle is fixedly arranged at one end of the lifting rod, which is far away from the end surface of one side of the first supporting block, and is far away from the fixed shaft, a switching control device is arranged in the first supporting block, the switching control device comprises a winding cavity arranged in the first supporting block, a motor is fixedly arranged at the left-right symmetrical position in the upper wall of the winding cavity, the lower end of the motor is dynamically connected with a winding, be equipped with protection device on the vaulting pole, protection device includes that the front and back symmetry just is fixed locates the vaulting pole keeps away from a side end face's fixed block mutually, be equipped with the second upset groove on the fixed block, can the pivoted be equipped with the second upset pole about the second upset groove between the wall, the fixed guardrail that is equipped with of second upset pole lower extreme, when needing the second upset pole can upwards overturn the guarantee wounded's safety.

2. The stretcher convenient for slope handling as claimed in claim 1 wherein: switching control device is including locating the first upset groove of terminal surface bilateral symmetry position under the vaulting pole, the first upset inslot can the pivoted be equipped with first upset pole, first upset pole with the first spring of fixedly connected with between the first upset groove upper wall, the interior bilateral symmetry of coiling chamber front and back wall is equipped with two sets of first slider chambeies, gliding first slider that is equipped with around the first slider intracavity ability, first slider upper wall intercommunication is equipped with the rack chamber, the rack chamber internal energy is gliding from top to bottom is equipped with profile of tooth pole, profile of tooth pole with fixedly connected with second spring between the rack intracavity wall meshes and prevents with first slider when profile of tooth pole is in lower extreme position first slider slides, the winding bobbin with first slider is close to fixedly connected with first stay wire between the coiling chamber lateral surface, first slider is kept away from coiling chamber lateral surface with first upset pole is kept away from one side of first supporting block one side The end is fixedly connected with a second pull wire.

3. The stretcher convenient for slope handling as claimed in claim 1 wherein: be equipped with the second slider chamber in the handle, the second slider intracavity can the horizontal slip be equipped with the second slider, the second slider with apart from nearest fixedly connected with third stay wire between the profile of tooth pole up end, second slider chamber upper wall intercommunication is equipped with the ascending first connecting groove of opening, the horizontal slip be equipped with the upper end in first connecting groove and extend to outer slide switch, slide switch lower extreme fixed connection in the second slider.

4. The stretcher convenient for slope handling as claimed in claim 1 wherein: it is equipped with first spacing chamber to lift in the thick stick, the slidable first stopper that is equipped with in first spacing intracavity, first spacing chamber is close to first supporting block one side inner wall intercommunication is equipped with the second spread groove that the opening is relative, gliding being equipped with the connecting rod in the second spread groove, connecting rod one end fixed connection in first stopper, the connecting rod other end extends to outer and is equipped with the third spread groove, first upset pole is kept away from link up around the one end of first supporting block one side is equipped with the spacing groove, both ends fixed connection around the slidable being equipped with of spacing inslot in the gag lever of wall around the third spread groove.

5. The stretcher convenient for slope handling as claimed in claim 1 wherein: the protection device comprises a torsional spring fixedly arranged between the front end surface and the rear end surface of the second turnover rod and the inner wall of the second turnover groove, an elastic rope is fixedly connected between the end surface of the second turnover rod far away from one side of the support rod and the upper end surface of the first turnover rod, a first clamping groove is arranged on the end surface of the second turnover rod far away from one side of the support rod, a second clamping groove is communicated with the lower wall of the first clamping groove, a first clamping block cavity is communicated with the inner wall of the second turnover groove far away from one side of the support rod, a first clamping block is arranged in the first clamping block cavity in a front-and-rear sliding manner, a third spring is fixedly connected between the first clamping block and the first clamping block cavity, a second clamping block cavity with an upward opening is arranged on the upper end surface of the first clamping block, a second clamping block is arranged in the second clamping block cavity in a vertical sliding manner, and a fourth, and a fourth pull wire is fixedly connected between the lower end of the second fixture block and the left and right second slide blocks on the same side, when the second turnover rod is turned upwards to be vertical, one end of the first fixture block can extend into the first clamping groove, and one end of the second fixture block can extend into the second clamping groove.

6. The stretcher convenient for slope handling as claimed in claim 5 wherein: the upper wall of the first clamping block cavity is communicated with a pushing block cavity, the upper end of the second clamping block can extend into the pushing block cavity, a push block is arranged in the push block cavity in a manner of sliding up and down, a second limit cavity is communicated with the inner wall of the push block cavity, a second limiting block fixedly connected with the push block is arranged in the second limiting cavity in a manner of sliding up and down, a supporting rod cavity is communicated between the upper wall of the pushing block cavity and the fixed block, a supporting rod with one end capable of extending into the second turnover groove is arranged in the supporting rod cavity in a front-back sliding manner, a fifth spring is fixedly connected between the abutting rod and the inner wall of the abutting rod cavity, an abutting groove with a downward opening is arranged on the lower end surface of the abutting rod, the upper end of the push block can extend into the abutting groove, when the second turnover rod is turned upwards to be in a vertical state, the abutting rod is pushed back to the fifth spring, and the pushing block is pushed to slide downwards and push the second clamping block out of the pushing block cavity.