CN108478355B

CN108478355B - mother-infant bed for obstetrics and gynecology department

Info

Publication number: CN108478355B
Application number: CN201810352811.6A
Authority: CN
Inventors: 刚香平; 潘金祥
Original assignee: Individual
Current assignee: Liangshan County People's Hospital
Priority date: 2018-04-19
Filing date: 2018-04-19
Publication date: 2020-01-31
Anticipated expiration: 2038-04-19
Also published as: CN108478355A

Abstract

The invention relates to beds for obstetrics and gynecology, in particular to maternal and infant beds for obstetrics and gynecology, which aims to provide maternal and infant beds for obstetrics and gynecology, which can combine a sickbed of a lying-in woman with a crib, can facilitate the lying-in woman to take care of a baby, save time and labor and can reduce the burden of the lying-in woman.

Description

mother-infant bed for obstetrics and gynecology department

Technical Field

The invention relates to obstetric and gynecologic beds, in particular to maternal and infant beds for obstetrics and gynecology.

Background

The obstetrics and gynecology department is which is four main subjects of clinical medicine, mainly researches etiology, pathology, diagnosis and prevention of female reproductive organ diseases, physiological and pathological changes of pregnancy and childbirth, prevention and treatment of high-risk pregnancy and dystocia, female reproductive endocrine, family planning, female health care and the like, deeply researches on medical basic theories such as modern molecular biology, oncology, genetics, reproductive endocrinology, immunology and the like and advances of clinical diagnosis and treatment detection technology, widens and deepens the development of the obstetrics science, plays an important role in guaranteeing the health and reproductive health of women and preventing and treating various diseases of the obstetrics, the obstetrics science is closely related to the clinical science such as surgery, internal medicine, gynecology and the like, needs modern diagnosis and treatment technologies such as endoscope morbidity technology, imaging and radiology intervention, clinical pharmacology, embryology, anatomy, epidemiology and the like, has characteristics and needs comprehensive clinical and basic subjects of obstetrics, the maternal and the pregnant women are mainly pregnant women and the group, the health group is a special group of pregnant women, and the people of the pregnant women are high-age group of the intensive nursing and the high-risk group of the infant, and the hospital.

Present lying-in woman's sick bed and crib are the phase separation, lead to the lying-in woman to be difficult to convenient to look after the baby, waste time and energy, have aggravated lying-in woman's burden, are unfavorable for lying-in woman's recovery, consequently need urgently to need to research and develop kinds can combine together lying-in woman's sick bed and crib, can make things convenient for the lying-in woman to look after the baby, labour saving and time saving, can alleviate the maternal and infant bed that is used for gynaecology and obstetrics of lying-.

Disclosure of Invention

In order to overcome the defects that the existing sickbed and the existing crib of a lying-in woman are separated, so that the lying-in woman is difficult to conveniently care for a baby, time and labor are wasted, the burden of the lying-in woman is increased, and the lying-in woman is not easy to recover, the invention aims to provide maternal and infant beds for the obstetrics and gynecology department, which can combine the sickbed and the crib of the lying-in woman, can conveniently care for the baby by the lying-in woman, save time and labor, and can reduce the burden of the lying-in woman.

a mother and infant bed for obstetrics and gynecology department, including the base, the backup pad, the th bed board, the side guard board, the big concave plate, the slide plate, the th bearing, the th rotation axis, the small bed board, the left baffle, the back baffle, the right baffle, the front baffle, the second bed board, the second backup pad, the big fixed plate, the electronic reel, the stay wire and the connecting rod, the backup pad is located above the base, the bottom of the th backup pad is connected with the top of the base, the th bed board is located above the th backup pad, the bottom of the second bed board is connected with the top of the th backup pad, the side guard board is located behind the th bed board, the lower part of the side guard board front side wall is connected with the back side wall of the th bed board, the upper part of the side guard board is provided with the long chute, the big concave plate is located in the long chute, the slide plate is located above the long chute, the slide plate is located above the side guard board, the slide plate is located above the side guard board, the bottom of the slide plate, the slide plate is connected with the big concave plate, the top of the big concave plate, the bottom of the side guard board, the bottom of the bottom.

Optionally, the sliding type side protection plate comprises a small concave plate, a nut, a sliding block, a sliding rail, a screw rod, a right bearing seat, a left bearing seat and an -th rotating wheel, wherein the small concave plate is located below the large concave plate, the large concave plate is slidably located in the small concave plate, the nut is located below the small concave plate, the nut is connected with the small concave plate, the sliding block is located below the nut, the sliding block is connected with the nut, the sliding rail is located behind the side protection plate, the sliding rail is connected with the rear side wall of the side protection plate, the sliding block is slidably located on the sliding rail, the nut is sleeved on the screw rod, the screw rod is in threaded connection with the nut, the right bearing seat is located on the right side of the nut, the right bearing seat is connected with the rear side wall of the side protection plate, the right end of the screw rod is in interference connection with a bearing in the right bearing seat, the left bearing seat is located on the left side wall of the nut, the left end of the left bearing seat is.

Optionally, the rotating plate further comprises a small fixing plate, a second bearing, a long connecting shaft, a second rotating wheel, a third bearing, a long connecting plate, a fourth bearing, a second rotating shaft, a rotating disk, a hanging ring, a th belt pulley, a second belt pulley and a th circulating belt, wherein the small fixing plate is located on the right side of the large fixing plate, the left side wall of the small fixing plate is connected with the right side wall of the large fixing plate, the second bearing is embedded in the small fixing plate, the lower end of the long connecting shaft is arranged in interference connection with the second bearing, the second rotating wheel is located below the small fixing plate, the second rotating wheel is connected with the lower end of the long connecting shaft, the third bearing is located above the second bearing, the third bearing is arranged in interference connection with the upper end of the long connecting shaft, the third bearing is embedded in the left side of the long connecting plate, the long connecting plate is located above the second bearing, the left side wall of the long connecting plate is connected with the right side wall of the large fixing plate, the fourth bearing is embedded in the right portion of the long connecting plate, the second rotating shaft is arranged in interference connection with the fourth bearing, the rotating disk is located below the fourth bearing, the top of the rotating disk is connected with the lower end of the second rotating disk, the rotating disk is evenly connected with the bottom of the second rotating disk.

Optionally, the spinning device further comprises a third belt pulley, a fourth belt pulley and a second circulating belt, wherein the third belt pulley is arranged on the th rotating shaft, the third belt pulley is connected with the th rotating shaft, the fourth belt pulley is located on the left side of the third belt pulley, the fourth belt pulley is arranged on the long connecting shaft, the fourth belt pulley is connected with the long connecting shaft, the fourth belt pulley is located between the second bearing and the second rotating wheel, and the fourth belt pulley and the third belt pulley are connected through the second circulating belt.

Optionally, the clamp comprises a universal wheel, a roller, a pressing plate, a long screw and a fixed block, the universal wheel and the roller are connected to the bottom of the base, the roller is located on the right side of the universal wheel, the universal wheel and the roller are symmetrically arranged front and back, the pressing plate is located on the left side of the roller, the long screw is located on the left side of the pressing plate, the right end of the long screw is connected with the pressing plate, the fixed block is located below the base, the top of the fixed block is connected with the bottom of the base, and the long screw and the fixed block are in.

Because the baby nursing bed comprises a base, a supporting plate, a bed board, side protecting plates, a large concave plate, a sliding plate, a bearing, a rotating shaft, a small bed board, a left baffle plate, a rear baffle plate, a right baffle plate, a front baffle plate, a second bed board, a second supporting plate, a large fixing plate, an electric reel, a stay wire and a connecting rod, when a baby needs to be watched by a puerpera, the electric reel can start to operate, the electric reel can wind the stay wire, so that the stay wire drives the second bed board to move upwards through the connecting rod, the arc-shaped groove provides guiding assistance for the upward movement of the connecting rod, so that the puerpera can lean upwards, so that the puerpera can lean against the second bed board which is moved completely, because the large concave plate can slide in the long sliding groove and then pull the large concave plate leftwards, the large concave plate can drive the sliding plate to move leftwards, the sliding plate drives the small bed board to move leftwards through the rotating shaft, so that the small bed board can move leftwards, the small baffle plate, the rear baffle plate, the baby can be moved upwards, the baby can be moved out conveniently through the sliding chute, the front baffle plate can be moved upwards, the baby can be used for the baby, the baby can be moved out conveniently, the baby can be moved out, the baby can be used for the baby, the baby on the baby, the baby can be conveniently moved out, the baby can be conveniently.

Because still including little notch plate, the nut, the slider, a slide rail, the lead screw, right side bearing frame, left side bearing frame and swiveling wheel, so when the lying-in woman needs to look after the baby, big notch plate has inserted in little notch plate this moment, the lying-in woman can lie and rotate swiveling wheel, swiveling wheel drives the nut through the lead screw and moves left, the nut drives big notch plate through little notch plate and moves left, thereby big notch plate can drive little bed board and move left, the slider provides the slip guide for the slip of nut and assists, the operation is simple and convenient more, when need not to remove the baby, can move big notch plate forward, then with big notch plate from the interior roll-off of little notch plate can, and big notch plate also can slide backward, be convenient for vacate the activity space for the leg of lying-in woman, the function is various.

Because still including little fixed plate, the second bearing, long connecting axle, the second swiveling wheel, the third bearing, long connecting plate, the fourth bearing, the second rotation axis, the rotary disk, the link, belt pulley, second belt pulley and circulation belt, so when needing to look after the baby, hang various toy on the link, then rotate second swiveling wheel, the second swiveling wheel drives long connecting axle and rotates, long connecting axle can drive the second belt pulley and rotate, the second belt pulley drives belt pulley through circulation belt and rotates, belt pulley drives the rotary disk through the second rotation axis and rotates, thereby the rotary disk can drive link and various toy play and rotate, attract the attention of baby, thereby prevent crying of baby.

Because still including the third belt pulley, fourth belt pulley and second circulation belt, so after sliding location with big concave plate left, can overlap second circulation belt on fourth belt pulley and third belt pulley, then rotate the second swiveling wheel, the second swiveling wheel can drive the fourth belt pulley and rotate, the fourth belt pulley drives the third belt pulley through second circulation belt and rotates, the third belt pulley can drive the rotation axis and rotate, the second swiveling wheel can drive long connecting axle and rotate simultaneously, thereby can play baby and toy and carry out slow rotation, thereby better attraction baby's attention.

The medical nursing bed is characterized in that the bed body comprises a bed body, a bed cover, a bed.

The maternal and infant beds for obstetrics and gynecology department provided by the invention can combine the hospital bed of the puerpera with the crib, can facilitate the puerpera to take care of the baby, is time-saving and labor-saving, can reduce the burden of the puerpera, has simple and flexible structure, is convenient to adjust, is beneficial to the rest of the puerpera and the baby, is easy to produce and manufacture, is easy to maintain and has safe and reliable performance.

Drawings

Fig. 1 is a schematic front view structure of the present invention.

FIG. 2 is a right side view schematic of the large concave plate of the present invention.

Fig. 3 is a schematic top view of a tailgate of the present invention.

Fig. 4 is a rear view structural diagram of the screw rod of the present invention.

Fig. 5 is a front view structural schematic diagram of the long connecting shaft of the present invention.

Fig. 6 is a front view structural schematic diagram of a second endless belt of the present invention.

Fig. 7 is a front view structural diagram of the fixing block of the present invention.

The belt conveyor comprises a base, a second supporting plate, a third bed plate, a side guard plate, a large concave plate, a sliding plate, a second bearing, a second rotating shaft, a second bed plate, a left baffle plate, a rear baffle plate, a right baffle plate, a front baffle plate, a sliding plate, a second bed plate, a second supporting plate, a second rotating wheel, a third rotating wheel, a long connecting plate, a second bearing, a long connecting shaft, a second rotating wheel, a third bearing, a long connecting plate, a fourth bearing, a second rotating shaft, a rotating disc, a hanging ring, a pulley, a belt wheel, a pulley, a.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

is used for mother and infant beds of obstetrics and gynecology department, as shown in fig. 1-7, the bed comprises a base 1, a support plate 2, a 0 bed plate 3, a side guard plate 4, a large concave plate 5, a sliding plate 6, a 1 bearing 7, a rotation shaft 8, a small bed plate 9, a left guard plate 10, a rear guard plate 11, a right guard plate 12, a front guard plate 13, a second bed plate 14, a second support plate 15, a large fixed plate 16, an electric reel 17, a stay wire 18 and a connecting rod 19, a support plate 2 is positioned above the base 1, a support plate 2 is positioned above the base 1, a bed plate 3 is positioned above a support plate 2, a bottom of a bed plate 3 is connected with the top of a support plate 2, a side guard plate 4 is positioned behind a 9, a bottom of the front side guard plate 4 is connected with a back side wall of a , a side guard plate 401 is positioned above a bottom of a small bed plate 7, a bottom of a sliding type rear guard plate 7, a bottom of a sliding type bed plate 7, a bottom of a sliding type rear guard plate 7 is positioned above a sliding type rear guard plate 7, a bottom of a sliding type rear guard plate 7, a bottom of a sliding type rear guard plate 7 is positioned above a sliding type rear guard plate 7, a bottom of a sliding type rear guard plate 7, a bottom of a sliding type rear guard plate 7 is positioned above a sliding type rear guard plate 7, a bottom of a sliding type rear baffle plate 7, a sliding type rear baffle plate 466, a sliding type rear baffle plate 7 is positioned above a sliding type baffle plate of a sliding type baffle plate 466, a sliding type baffle plate 7 is positioned above a sliding type baffle plate of a sliding type baffle plate 7, a sliding type baffle plate of a sliding type baffle plate 466, a sliding type baffle plate 7 is positioned above a sliding type baffle plate of a sliding type baffle plate 7, a sliding type baffle plate of a sliding type baffle plate 466, a sliding type baffle plate 7 is positioned above a sliding type baffle plate of a sliding type baffle plate 7 is positioned above a sliding type baffle plate 466, a sliding type baffle plate 7 is positioned above a sliding type baffle plate of a sliding type baffle plate 7, a sliding type baffle plate of a sliding type baffle plate 466, a sliding type baffle plate of a sliding type baffle plate 7, a sliding type baffle plate 466, a sliding type baffle plate 7 is positioned above a sliding type baffle plate 7, a sliding.

Example 2

The novel side protection plate structure comprises a small concave plate 21, a nut 22, a sliding block 23, a sliding rail 24, a screw rod 25, a right bearing seat 26, a left bearing seat 27 and a rotating wheel 28, wherein the small concave plate 21 is located below a large concave plate 5, the large concave plate 5 is located in the small concave plate 21 in a sliding mode, the nut 22 is located below the small concave plate 21, the nut 22 is connected with the small concave plate 21, the sliding block 23 is located below the nut 22, the sliding block 23 is connected with the nut 22, the sliding rail 24 is located behind a side protection plate 4, the sliding rail 24 is connected with the rear side wall of the side protection plate 4, the sliding block 23 is located on the sliding rail 24 in a sliding mode, the nut 22 is sleeved on the screw rod 25, the screw rod 25 is in threaded connection with the nut 22, the right bearing seat 26 is located on the right side of the nut 22, the right bearing seat 26 is connected with the rear side wall of the side protection plate 4, the right end of the screw rod 25 is in interference connection with the left end of the rotating wheel 28, and the left end of the rotating wheel is connected with the left side end of the rotating wheel 28.

Example 3

The belt conveyor further comprises a small fixed plate 31, a second bearing 32, a long connecting shaft 33, a second rotating wheel 34, a third bearing 35, a long connecting plate 36, a fourth bearing 37, a second rotating shaft 38, a rotating disc 39, a hanging ring 40, a th belt pulley 41, a second belt pulley 42 and a th circulating belt 43, wherein the small fixed plate 31 is positioned on the right side of the large fixed plate 16, the left side wall of the small fixed plate 31 is connected with the right side wall of the large fixed plate 16, the second bearing 32 is embedded in the small fixed plate 31, the lower end of the long connecting shaft 33 is in interference connection with the second bearing 32, the second rotating wheel 34 is positioned below the small fixed plate 31, the second rotating wheel 34 is connected with the lower end of the long connecting shaft 33, the third bearing 35 is positioned above the second bearing 32, the third bearing 35 is arranged in interference connection with the upper end of the long connecting shaft 33, the third bearing 35 is embedded in the left side of the long connecting plate 36, the long connecting plate 36 is positioned above the second bearing 32, the left side wall of the long connecting plate 36 is connected with the right side wall of the large fixed plate 16, the fourth bearing 37 is arranged in interference connection with the right side of the long connecting plate 36, the second bearing 37, the second rotating shaft 37 is arranged above the rotating disc 41, the second bearing 35 is connected with the rotating disc 34, the rotating disc 37, the rotating disc is connected with the rotating disc 41, the rotating disc 39 is connected with the rotating disc 19.

Example 4

The belt conveyor further comprises a third belt pulley 51, a fourth belt pulley 52 and a second circulating belt 53, wherein the third belt pulley 51 is arranged on the -th rotating shaft 8, the third belt pulley 51 is connected with the -th rotating shaft 8, the fourth belt pulley 52 is positioned on the left side of the third belt pulley 51, the fourth belt pulley 52 is arranged on the long connecting shaft 33, the fourth belt pulley 52 is connected with the long connecting shaft 33, the fourth belt pulley 52 is positioned between the second bearing 32 and the second rotating wheel 34, and the fourth belt pulley 52 is connected with the third belt pulley 51 through the second circulating belt 53.

Still including universal wheel 61, gyro wheel 62, the clamp plate 63, long screw 64 and fixed block 65, base 1's bottom is connected with universal wheel 61 and gyro wheel 62, gyro wheel 62 is located universal wheel 61's right side, universal wheel 61 and gyro wheel 62 are the setting of symmetry formula around, clamp plate 63 is located gyro wheel 62's left side, long screw 64 is located clamp plate 63's left side, long screw 64's right-hand member is connected with clamp plate 63, fixed block 65 is located base 1's below, the top of fixed block 65 is connected with base 1's bottom, long screw 64 sets up to threaded connection with fixed block 65.

Because the present invention includes the base 1, the supporting plate 2, the bed board 3, the side guard 4, the large concave plate 5, the sliding plate 6, the bearing 7, the rotating shaft 8, the small bed board 9, the left baffle 10, the rear baffle 11, the right baffle 12, the front baffle 13, the second bed board 14, the second supporting plate 15, the large fixing plate 16, the electric reel 17, the stay wire 18 and the connecting rod 19, when the puerpera needs to look after the baby, the electric reel 17 can be started to operate, the electric reel 17 can wind the stay wire 18, so the stay wire 18 drives the second bed board 14 to move upwards through the connecting rod 19, the arc-shaped groove 161 provides guiding assistance for the upward movement of the connecting rod 19, so that the puerpera can lean against the moved second bed board 14, because the large concave plate 5 can slide in the long sliding groove 401, then the large concave plate 5 is pulled leftwards, the large concave plate 5 can drive the sliding plate 6 to move leftwards, the sliding plate 6 can move leftwards through the , the sliding plate 6 can drive the small bed board 10 to move leftwards, the baby front baffle 13 and the baby front baffle 13, the baby can be moved leftwards, the baby front baffle 13 can be moved conveniently, the baby bed board 5913 can be moved upwards by the baby sliding groove 131, the baby sliding groove 13, the baby rear baffle 13, the baby sliding groove can be moved leftwards, the baby sliding groove 13, the baby sliding groove 599, the baby rear baffle 13 can be easily, the baby sliding groove 13 can be conveniently, the baby sliding groove 13, the baby bed board when the baby bed board can be moved leftwards, the baby bed board when the baby bed board can be conveniently, the baby bed board when the baby bed board can be moved conveniently, the baby bed board 599 and the baby bed board 599.

Because still including little notch plate 21, the nut 22, the slider 23, slide rail 24, the lead screw 25, right bearing frame 26, left bearing frame 27 and swiveling wheel 28, so when lying-in woman needs to look after the baby, big notch plate 5 has inserted in little notch plate 21 this moment, lying-in woman can lie and rotate swiveling wheel 28, swiveling wheel 28 drives nut 22 through lead screw 25 and moves left, nut 22 drives big notch plate 5 through little notch plate 21 and moves left, thereby big notch plate 5 can drive little notch plate 9 and move left, slider 23 provides the slip direction supplementary for the slip of nut 22, it is more simple and convenient to operate, when need not to remove the baby, can move big notch plate 5 forward, then with big notch plate 5 from little notch plate 21 in can, and big notch plate 5 also can slide backward, be convenient to vacate the activity space for the leg of lying-in woman, the function is various.

Because the baby nursing device further comprises the small fixing plate 31, the second bearing 32, the long connecting shaft 33, the second rotating wheel 34, the third bearing 35, the long connecting plate 36, the fourth bearing 37, the second rotating shaft 38, the rotating disc 39, the hanging ring 40, the th belt pulley 41, the second belt pulley 42 and the th circulating belt 43, when a baby needs to be watched, various small toys are hung on the hanging ring 40, then the second rotating wheel 34 is rotated, the second rotating wheel 34 drives the long connecting shaft 33 to rotate, the long connecting shaft 33 can drive the second belt pulley 42 to rotate, the second belt pulley 42 drives the th belt pulley 41 to rotate through the th circulating belt 43, the th belt pulley 41 drives the rotating disc 39 to rotate through the second rotating shaft 38, and the rotating disc 39 can drive the hanging ring 40 and various small toys to rotate, so that the attention of the baby is attracted, and the baby is prevented from crying.

Because the baby stroller further comprises a third belt pulley 51, a fourth belt pulley 52 and a second circulating belt 53, after the large concave plate 5 is slid to , the second circulating belt 53 can be sleeved on the fourth belt pulley 52 and the third belt pulley 51, and then the second rotating wheel 34 is rotated, the second rotating wheel 34 can drive the fourth belt pulley 52 to rotate, the fourth belt pulley 52 drives the third belt pulley 51 to rotate through the second circulating belt 53, the third belt pulley 51 can drive the rotating shaft 8 to rotate, and meanwhile, the second rotating wheel 34 can drive the long connecting shaft 33 to rotate, so that the baby stroller and the toy can be slowly rotated, and the attention of the baby can be better attracted.

Because the medical nursing bed further comprises the universal wheel 61, the roller 62, the pressing plate 63, the long screw 64 and the fixing block 65, the medical nursing personnel can move the medical nursing bed through the universal wheel 61 and the roller 62, the universal wheel 61 can flexibly turn, the movement is more convenient, when the medical nursing bed is moved to a required position, the medical nursing personnel rotates the long screw 64, the long screw 64 drives the pressing plate 63 to move rightwards, the pressing plate 63 is in contact with the roller 62, the rotation of the roller 62 can be prevented, and therefore the medical nursing bed is fixed and prevented from shaking leftwards and rightwards.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

The utility model discloses a bed for gynaecology and obstetrics, its characterized in that, including base (1), the backup plate (2) of the No. 7, 0 bed board (3), side backplate (4), big concave board (5), slide plate (6), second 1 bearing (7), second 2 rotation axis (8) of the No. 7, the rotation axis (34) of the No. 7 is located, the rotation axis (34) of the No. 7 is located the rotation axis (7) of the No. 7, the bottom of the No. 4 backup plate (2) of the No. 4, the No. 4) of the No. 7 is located the bottom of the backup plate (2) of the No. 6, the No. 7, the bottom of the backup plate (2) of the No. 7, the rotating shaft 7, the rotating bed plate is located the rotating shaft 7, the rotating shaft is connected with the rotating shaft 20, the rotating shaft of the rotating shaft 20, the rotating shaft of the rotating shaft is located the rotating shaft 20, the rotating shaft of the rotating shaft is connected with the rotating shaft of the rotating shaft of rotating shaft of rotating shaft of rotating shaft of rotating shaft of.
2. maternal and infant bed for gynaecology and obstetrics according to claim 1, further comprising a third belt pulley (51), a fourth belt pulley (52) and a second endless belt (53), the third belt pulley (51) is arranged on the rotation axis (8), the third belt pulley (51) is connected with the rotation axis (8), the fourth belt pulley (52) is located on the left side of the third belt pulley (51), the fourth belt pulley (52) is arranged on the long connection axis (33), the fourth belt pulley (52) is connected with the long connection axis (33), the fourth belt pulley (52) is located between the second bearing (32) and the second rotation wheel (34), the fourth belt pulley (52) is connected with the third belt pulley (51) through the second endless belt (53).
3. The maternal and infant bed for gynaecology and obstetrics according to claim 2, further comprising a universal wheel (61), a roller (62), a pressing plate (63), a long screw (64) and a fixed block (65), the bottom of base (1) is connected with universal wheel (61) and roller (62), roller (62) is located on the right side of universal wheel (61), universal wheel (61) and roller (62) are both arranged in a front-back symmetrical manner, pressing plate (63) is located on the left side of roller (62), long screw (64) is located on the left side of pressing plate (63), the right end of long screw (64) is connected with pressing plate (63), fixed block (65) is located below base (1), the top of fixed block (65) is connected with the bottom of base (1), and long screw (64) and fixed block (65) are arranged in threaded connection.