CN210228428U

CN210228428U - Orthopedic nursing traction frame

Info

Publication number: CN210228428U
Application number: CN201920722384.6U
Authority: CN
Inventors: Xiaofang Song; 宋小方; Kefu Sun; 孙克富; Xiaohong Wang; 王晓红
Original assignee: Lianyungang Oriental Hospital
Current assignee: Lianyungang Oriental Hospital
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-04-03
Anticipated expiration: 2029-05-20

Abstract

The utility model relates to an orthopedic nursing traction frame, belonging to the technical field of medical equipment; a frame is fixed on the upper side of the base, a front cover plate is arranged on the front side of the frame, a neck traction mechanism is fixed on the inner side wall of the front cover plate, a rear cover plate is arranged on the rear side of the neck traction mechanism, the rear cover plate is fixed on the rear side wall of the frame, a leg traction mechanism is arranged on the inner side wall of the lower side of the frame, a support rod is suspended on the upper side of the front end of the leg traction mechanism, the support rod is inserted in the front end of the limit rod and is screwed through threads, the rear end of the limit rod is inserted in the sleeve, the upper surface of the sleeve is fixed on the inner side wall of the upper side of the frame, a neck traction mechanism and a leg traction mechanism are arranged in the frame, when in use, the front cover plate can be lifted for traction treatment, and when not in use, the front cover plate is closed, thereby being convenient for carrying, thereby can supply the patient to use along with carving at any time, the utility model has the advantages of reasonable arrangement, low manufacturing cost and the like.

Description

Orthopedic nursing traction frame

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to orthopedic nursing traction frame.

Background

The traction frame is a novel instrument which adopts mechanical transmission to carry out traction, applies the characteristics of scientific combination of human physiology and mechanical physics mechanics, is widely applied to lumbar disc herniation, lumbocrural pain, radioactive leg and foot numbness, leg and foot muscular atrophy caused by walking physics, traumatic cervical vertebra fracture, dislocation and other symptoms caused by various acute and chronic injuries, and can also be applied to cervical spondylosis, cervical vertebra dizziness, headache and tinnitus, abnormal blood pressure and other clinical symptoms, however, the traction frame in the prior art is not convenient to carry, thereby being incapable of ensuring that a patient can carry out traction and treatment at any moment and at any moment, and urgent need to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a reasonable in design, convenient to use's orthopedics nursing traction frame, be equipped with neck drive mechanism and shank drive mechanism in the frame, it can lift the back with the front shroud when needing to use, pulls the treatment, when not using, then closes the front shroud, conveniently carries to can supply the patient to follow the use carved at any time.

In order to achieve the above object, the utility model adopts the following technical scheme: the upper side of the base is fixed with the frame, the front side of the frame is provided with a front cover plate, the upper end of the front cover plate is screwed with the upper surface of the frame through a hinge, the lower end of the front cover plate is fixedly connected with the front side wall of the base through a hinge lock, the inner side wall of the front cover plate is fixed with a neck traction mechanism, the rear side of the neck traction mechanism is provided with a rear cover plate, the rear cover plate is fixed on the rear side wall of the frame, the inner side wall of the lower side of the frame is provided with a leg traction mechanism, the upper side of the front end of the leg traction mechanism is suspended with a support rod, the support rod is inserted into the front end of a limit rod and is screwed through a thread, the rear end of the limit rod is inserted into a sleeve, and the upper surface of the sleeve is fixed on the inner side wall of;

the neck traction mechanism comprises a first fixing plate, a first motor, a first lead screw, a control switch, a fixing rod, a connecting rope and a neck fixing ring, wherein the first fixing plate is fixed on the inner side wall of the left side of the frame, the lower surface of the first fixing plate is fixed with the first motor, the lower end of the first motor is arranged in a manner of abutting against the inner side wall of the lower side of the frame, the first motor is connected with the control switch, the control switch is arranged on the inner side wall of the lower side of the frame, an output shaft of the first motor penetrates through the fixing plate and is fixedly connected with the lower end of the first lead screw, the connecting rope is fixed on a screw nut on the first lead screw, the other end of the connecting rope sequentially penetrates through a pulley and a circular ring at the upper end of the neck fixing ring and is fixed on the fixing rod, the fixing rod is fixed on the inner side wall on the right side of, the left side of the first screw rod is provided with a guide rod, the lower end of the guide rod is fixed on the upper surface of the first fixing plate, and a linear bearing of the guide rod is fixedly connected with a nut on the first screw rod through a connecting rod;

the leg traction mechanism comprises a slide rail, an insert rod, an L-shaped plate, a second lead screw, a support plate, a second fixing plate, a positive and negative motor and a positive and negative switch, wherein the left end and the right end of the L-shaped plate are respectively screwed with a first connecting piece through bolts, the lower end of the first connecting piece slides on the slide rail through a slide block, the slide rail is respectively fixed on the inner side wall of the lower side of the frame, the insert rod is inserted in the front of the slide rail and fixed through bolts, the second connecting piece is fixed at the front end of the insert rod, the support plate is screwed with the upper end of the second connecting piece through bolts, the upper end of the support plate is screwed with the upper end of the L-shaped plate through a hinge, the second fixing plate is arranged on the right side of the right slide rail, the lower end of the second fixing plate is respectively fixed on the front side and the back side of the inner side wall of the lower side of, with the front end fixed connection of No. two lead screws, the rear end of No. two lead screws connects soon through the preceding lateral wall of bearing and No. two fixed plates of rear side, and the screw on No. two lead screws passes through connecting rod and the slider fixed connection on the slide rail of right side, and positive and negative motor is connected with positive and negative switch, and this positive and negative switch is put and is established on the inside wall of frame downside.

Furthermore, the upper end of the first screw rod is screwed with a limiting plate through a bearing, and the left end of the limiting plate is fixed on the inner side wall of the left end of the frame.

Furthermore, a handle is arranged on the outer side wall of the upper end of the frame, and the left end and the right end of the handle are fixedly connected with the upper side wall of the frame respectively.

Further, the base be hollow structure, the inside left end of base is equipped with No. two motors, the output shaft of this No. two motors and the axis of rotation fixed connection of action wheel lower extreme, the action wheel passes through the conveyer belt and is connected with from the driving wheel, set up in the inside right-hand member of base from the driving wheel, action wheel and all be fixed with the lead screw No. three from the axis of rotation of driving wheel upper end, the upper end of this lead screw No. three passes behind the last lateral wall of base, insert in the lateral wall of establishing both ends about the frame, the screw on the lead screw No. three inlays to be established in the lateral wall of the frame left and right sides, and.

Furthermore, a plurality of grooves are equidistantly distributed on the outer side walls of the left side and the right side of the frame, the positioning pins penetrate through the support posts and are inserted into the grooves, and the lower ends of the support posts are respectively fixed on the left end and the right end of the upper side wall of the base.

After the structure is adopted, the utility model discloses beneficial effect does: an orthopedic nursing traction frame, be equipped with neck drive mechanism and shank drive mechanism in the frame, it can lift the back with the front shroud when needing to use, pulls the treatment, when not using, then closes the front shroud, conveniently carries to can supply the patient to follow the use carved at any time, the utility model has the advantages of it is reasonable to set up, the cost of manufacture is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

Fig. 2 is a front sectional view of the present invention.

Fig. 3 is a side sectional view of the present invention.

Fig. 4 is a side cross-sectional view of the mid-neck traction mechanism of the present invention in use.

Fig. 5 is a top view of the middle leg traction mechanism of the present invention.

Description of reference numerals:

the device comprises a base 1, a frame 2, a front cover plate 3, a rear cover plate 4, a neck traction mechanism 5, a first fixing plate 5-1, a first motor 5-2, a first screw rod 5-3, a control switch 5-4, a fixing rod 5-5, a connecting rope 5-6, a neck fixing ring 5-7, a pulley 5-8, a guide rod 5-9, a leg traction mechanism 6, a slide rail 6-1, an inserted link 6-2, an L-shaped plate 6-3, a second screw rod 6-4, a supporting plate 6-5, a second fixing plate 6-6, a positive and negative motor 6-7, a positive and negative switch 6-8, a first connecting piece 6-9, a second connecting piece 6-10, a supporting rod 7, a limiting rod 8, a sleeve 9, a second motor 10, a driving wheel 11, a driven wheel 12, a third screw rod 13, a limiting plate 14, a first, Handle 15, recess 16, pillar 17, locating pin 18.

Detailed Description

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

Referring to fig. 1 to 5, the technical solution adopted by the present embodiment is: the novel leg traction device comprises a base 1, a frame 2, a front cover plate 3, a rear cover plate 4, a neck traction mechanism 5 and a leg traction mechanism 6, wherein the frame 2 is fixed on the upper side of the base 1 through bolts, the front cover plate 3 is arranged on the front side of the frame 2, the upper end of the front cover plate 3 is screwed with the upper surface of the frame 2 through a hinge, one end of the hinge is fixed on the upper surface of the frame 2 through bolts, the other end of the hinge is fixed on the upper end of the front cover plate 3 through bolts, the lower end of the front cover plate 3 is fixedly connected with the front side wall of the base 1 through a hinge lock, the fixed edge of the hinge lock is fixed on the front side wall of the lower end of the front cover plate 3 through bolts, the movable edge of the hinge lock is sleeved on a circular ring, the circular ring is fixed on the front side wall of the base 1 through bolts, the neck traction mechanism 5 is arranged on the inner side wall of the front cover plate 3, a leg traction mechanism 6 is arranged on the inner side wall of the lower side of the frame 2, a support rod 7 is suspended on the upper side of the front end of the leg traction mechanism 6, the support rod 7 is inserted into the front end of a limit rod 8 and is screwed through threads, the rear end of the limit rod 8 is inserted into a sleeve 9, and the upper surface of the sleeve 9 is welded and fixed on the inner side wall of the upper side of the frame 2;

the neck traction mechanism 5 comprises a first fixing plate 5-1, a first motor 5-2, a first screw rod 5-3, a control switch 5-4, a fixing rod 5-5, a connecting rope 5-6 and a neck fixing ring 5-7, wherein the first fixing plate 5-1 is fixedly welded on the inner side wall on the left side of the frame 2, the first motor 5-2 is fixedly arranged on the lower surface of the first fixing plate 5-1 through bolts, the lower end of the first motor 5-2 is abutted against the inner side wall on the lower side of the frame 2, the first motor 5-2 is connected with the control switch 5-4 through a lead wire, the control switch 5-4 is arranged on the inner side wall on the lower side of the frame 2, and an output shaft of the first motor 5-2 is fixedly welded with the lower end of the first screw rod 5-3 after passing through the first fixing plate 5-1, a connecting rope 5-6 is wound and fixed on a nut on the first screw rod 5-3, the other end of the connecting rope 5-6 sequentially passes through pulleys 5-8 and a circular ring at the upper end of a neck fixing ring 5-7 and then is wound and fixed on a fixed rod 5-5, the fixed rod 5-5 is welded and fixed on the inner side wall at the right side of the frame 2, the pulleys 5-8 are fixed on the rear side wall of the front cover plate 3 through bolts, the neck fixing ring 5-7 is suspended below the connecting rope 5-6, a guide rod 5-9 is arranged at the left side of the first screw rod 5-3, the lower end of the guide rod 5-9 is welded and fixed on the upper surface of the first fixed plate 5-1, a linear bearing on the guide rod is fixedly connected with the nut on the first screw rod 5-3 through a connecting rod, one end of the connecting rod is welded and fixed on a linear bearing on the guide rod 5-9, the other end of the screw rod is welded and fixed on a screw nut on the first screw rod 5-3;

the leg traction mechanism 6 comprises a slide rail 6-1, an insert rod 6-2, an L-shaped plate 6-3, a second screw rod 6-4, a support plate 6-5, a second fixing plate 6-6, a positive and negative motor 6-7 and a positive and negative switch 6-8, wherein the left end and the right end of the L-shaped plate 6-3 are respectively screwed with a first connecting piece 6-9 through bolts, the lower end of the first connecting piece 6-9 slides on the slide rail 6-1 through a slide block, the slide block is welded and fixed with the lower end of the first connecting piece 6-9, the slide block is arranged on the slide rail 6-1 in a sliding manner, the slide rail 6-1 is respectively welded and fixed on the inner side wall at the lower side of the frame 2, the insert rod 6-2 is inserted in the front side of the slide rail 6-1 and fixed through bolts, the second connecting piece 6-10 is welded and fixed at the front, the upper end of the second connecting piece 6-10 is screwed with a support plate 6-5 through a bolt, the upper end of the support plate 6-5 is screwed with the upper end of an L-shaped plate 6-3 through a hinge, one end of the hinge is fixed on the lower surface of the support plate 6-5 through a bolt, the other end of the hinge is fixed on the L-shaped plate 6-3 through a bolt, a second fixing plate 6-6 is arranged on the right side of a right side slide rail 6-1, the lower ends of the second fixing plates 6-6 are respectively welded and fixed on the front side and the rear side of the inner side wall of the lower side of the frame 2, a positive and negative motor 6-7 is fixed on the front side of the second fixing plate 6-6 through a bolt, an output shaft of the positive and negative motor 6-7 passes through the second fixing plate 6-6 on the front side and is welded and fixed with the front end of a second screw rod 6-4, the rear end of the second screw, the bearing is embedded in the side wall of a second fixing plate 6-6 at the rear side, the outer ring of the bearing is welded and fixed with the inner side wall of the second fixing plate 6-6, the inner ring of the bearing is welded and fixed with a second lead screw 6-4, a screw nut on the second lead screw 6-4 is fixedly connected with a slide block on a right slide rail 6-1 through a connecting rod, one end of the connecting rod is welded and fixed on the screw nut on the second lead screw 6-4, the other end of the connecting rod is welded and fixed on the slide block on the slide rail 6-1, a positive and negative motor 6-7 is connected with a positive and negative switch 6-8 through a lead, and the positive and negative switch 6-8 is arranged on the.

Furthermore, the upper end of the first screw rod 5-3 is screwed with a limit plate 14 through a bearing, the bearing is embedded in the limit plate 14, the outer ring of the bearing is welded and fixed with the inner side wall of the limit plate 14, the inner ring of the bearing is welded and fixed with the upper end of the first screw rod 5-3, the left end of the limit plate 14 is welded and fixed on the inner side wall of the left end of the frame 2, and the stability of the first screw rod 5-3 can be improved.

Furthermore, a handle 15 is arranged on the outer side wall of the upper end of the frame 2, and the left end and the right end of the handle 15 are respectively fixedly connected with the upper side wall of the frame 2 through bolts, so that the carrying is convenient.

Further, base 1 be hollow structure, the inside left end of base 1 is fixed with No. two motors 10 through the bolt, the output shaft of this No. two motors 10 and the axis of rotation welded fastening of action wheel 11 lower extreme, action wheel 11 passes through the conveyer belt and is connected with from driving wheel 12, set up in the inside right-hand member of base 1 from driving wheel 12, all welded fastening has No. three lead screw 13 in the axis of rotation of action wheel 11 and from the driving wheel 12 upper end, the upper end of this No. three lead screw 13 passes behind the last lateral wall of base 1, insert in the lateral wall at frame 2 left and right sides, the screw on No. three lead screw 13 inlays to be established in the lateral wall at frame 2 left and right sides, and with the inside wall welded fastening of frame 2, the height of.

Furthermore, a plurality of grooves 16 are equidistantly distributed on the outer side walls of the left side and the right side of the frame 2, the positioning pins 18 penetrate through the support posts 17 and are inserted into the grooves 16, the lower ends of the support posts 17 are respectively welded and fixed on the left end and the right end of the upper side wall of the base 1, and the stability of the frame 2 can be improved.

The working principle of the specific embodiment is as follows: when the cervical vertebra tractor is used, the base 1 is placed on a proper position, if the base 1 can only be placed on the ground, the second motor 10 is started, the second motor 10 drives the driving wheel 11 to rotate, the driving wheel 11 drives the driven wheel 12 to rotate through the conveyor belt, the driving wheel 11 and the driven wheel 12 simultaneously drive the third lead screw 13 to rotate, the third lead screw 13 drives the frame 2 to move upwards through a screw nut on the third lead screw 13 until the required position is reached, then the positioning pin 18 passes through the support post 17 and is inserted into the grooves 16 on the two sides of the frame 2, the front cover plate 3 is opened to 90 degrees, the limiting rod 8 is pulled out towards the front side, the support rod 7 is rotated until the upper end of the support rod 7 is abutted against the front cover plate 3, when the cervical vertebra tractor needs to be pulled, the control switch 5-4 is taken on the hand, then the head of a patient is placed in the neck fixing ring 5-7, then the first motor 5-2, the first motor 5-2 drives the first screw rod 5-3 to rotate, the first screw rod 5-3 drives the connecting rope 5-6 to move through a nut on the first screw rod, the connecting rope 5-6 drives the neck fixing ring 5-7 to move upwards until the first screw rod moves to a proper position, so that the neck can be pulled, when the leg needs to be pulled, the leg is placed in the frame 2, the foot is placed on a short plate of the L-shaped plate 6-3, the positive and negative motor 6-7 is started through the positive and negative switch 6-8, and the leg is driven to move through the positive rotation and the negative rotation of the positive and negative motor 6-7, so that the traction effect can be achieved.

After adopting above-mentioned structure, this embodiment beneficial effect does:

1. a neck traction mechanism 5 and a leg traction mechanism 6 are arranged in the frame 2, when the device is needed, the front cover plate 3 can be lifted for traction treatment, when the device is not used, the front cover plate 3 is closed, and the device is convenient to carry, so that the device can be used by a patient at any time;

2. a second motor 10 is arranged in the base 1, a driving wheel 11 can be driven to rotate by the second motor 10, after a driven wheel 12 is driven to rotate by the driving wheel 11, a third screw rod 13 can be driven to rotate together with the driven wheel 12, and the third screw rod 13 can drive the frame 2 to move upwards by a nut on the third screw rod 13, so that the function of adjusting the height of the frame 2 can be achieved;

3. the left side and the right side of the frame 2 are provided with support posts 17, positioning pins 18 are inserted on the support posts 17, and the positioning pins 18 are inserted in the grooves 16 on the two sides of the frame 2 after penetrating through the support posts 17, so that the support of the frame 2 can be enhanced.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides an orthopedics nursing traction frame which characterized in that: the leg traction mechanism comprises a base (1), a frame (2), a front cover plate (3), a rear cover plate (4), a neck traction mechanism (5) and a leg traction mechanism (6), wherein the frame (2) is fixed on the upper side of the base (1), the front cover plate (3) is arranged on the front side of the frame (2), the upper end of the front cover plate (3) is connected with the upper surface of the frame (2) in a screwing mode through a hinge, the lower end of the front cover plate is fixedly connected with the front side wall of the base (1) through a hinge lock, the neck traction mechanism (5) is fixed on the inner side wall of the front cover plate (3), the rear cover plate (4) is arranged on the rear side of the neck traction mechanism (5), the rear cover plate (4) is fixed on the rear side wall of the frame (2), the leg traction mechanism (6) is arranged on the inner side wall of the lower side of the frame (2), a support rod (7) is suspended on the upper side of, the rear end of the limiting rod (8) is inserted into a sleeve (9) through screw thread screwing, and the upper surface of the sleeve (9) is fixed on the inner side wall of the upper side of the frame (2);

the neck traction mechanism (5) is composed of a first fixing plate (5-1), a first motor (5-2), a first screw rod (5-3), a control switch (5-4), a fixing rod (5-5), a connecting rope (5-6) and a neck fixing ring (5-7), wherein the first fixing plate (5-1) is fixed on the inner side wall on the left side of the frame (2), the first motor (5-2) is fixed on the lower surface of the first fixing plate (5-1), the lower end of the first motor (5-2) is in abutting arrangement with the lower side of the inner side wall of the frame (2), the first motor (5-2) is connected with the control switch (5-4), the control switch (5-4) is arranged on the inner side wall on the lower side of the frame (2), and the output shaft of the first motor (5-2) passes through the first fixing plate (5-1), is fixedly connected with the lower end of a first screw rod (5-3), a connecting rope (5-6) is fixed on a nut on the first screw rod (5-3), the other end of the connecting rope (5-6) passes through the pulley (5-8) and the circular ring at the upper end of the neck fixing ring (5-7) in sequence and then is fixed on the fixing rod (5-5), the fixed rod (5-5) is fixed on the inner side wall on the right side of the frame (2), the pulley (5-8) is fixed on the rear side wall of the front cover plate (3), the neck fixing ring (5-7) is suspended below the connecting rope (5-6), the guide rod (5-9) is arranged on the left side of the first screw rod (5-3), the lower end of the guide rod (5-9) is fixed on the upper surface of the first fixed plate (5-1), and the linear bearing is fixedly connected with a nut on the first screw rod (5-3) through a connecting rod;

the leg traction mechanism (6) is composed of a sliding rail (6-1), an inserted link (6-2), an L-shaped plate (6-3), a second screw rod (6-4), a supporting plate (6-5), a second fixing plate (6-6), a positive and negative motor (6-7) and a positive and negative switch (6-8), wherein the left end and the right end of the L-shaped plate (6-3) are respectively screwed with a first connecting piece (6-9) through bolts, the lower end of the first connecting piece (6-9) respectively slides on the sliding rail (6-1) through a sliding block, the sliding rail (6-1) is respectively fixed on the inner side wall of the lower side of the frame (2), the inserted link (6-2) is inserted in the inner part of the front side of the sliding rail (6-1) and fixed through bolts, the second connecting piece (6-10) is fixed at the front end of the inserted link (6-2), the upper end of the second connecting piece (6-10) is screwed with a support plate (6-5) through a bolt, the upper end of the support plate (6-5) is screwed with the upper end of an L-shaped plate (6-3) through a hinge, the right side of a right side slide rail (6-1) is provided with a second fixing plate (6-6), the lower end of the second fixing plate (6-6) is respectively fixed on the front side and the rear side of the inner side wall of the lower side of the frame (2), the front side of the front side second fixing plate (6-6) is fixed with a positive and negative motor (6-7), the output shaft of the positive and negative motor (6-7) passes through the front side second fixing plate (6-6) and then is fixedly connected with the front end of a second lead screw (6-4), the rear end of the second lead screw (6-4) is screwed with the front side wall of the rear side second fixing plate (6, the screw nut on the second screw rod (6-4) is fixedly connected with the slide block on the right slide rail (6-1) through a connecting rod, the positive and negative motor (6-7) is connected with the positive and negative switch (6-8), and the positive and negative switch (6-8) is arranged on the inner side wall of the lower side of the frame (2).

2. The orthopedic care traction frame of claim 1, wherein: the upper end of the first screw rod (5-3) is screwed with a limiting plate (14) through a bearing, and the left end of the limiting plate (14) is fixed on the inner side wall of the left end of the frame (2).

3. The orthopedic care traction frame of claim 1, wherein: the outer side wall of the upper end of the frame (2) is provided with a handle (15), and the left end and the right end of the handle (15) are respectively fixedly connected with the upper side wall of the frame (2).

4. The orthopedic care traction frame of claim 1, wherein: base (1) be hollow structure, the inside left end of base (1) is equipped with No. two motor (10), the output shaft of this No. two motor (10) and the axis of rotation fixed connection of action wheel (11) lower extreme, action wheel (11) pass through the conveyer belt and are connected from driving wheel (12), set up in the inside right-hand member of base (1) from driving wheel (12), all be fixed with No. three lead screw (13) in action wheel (11) and the axis of rotation of following driving wheel (12) upper end, the last side wall back of base (1) is passed to the upper end of this No. three lead screw (13), insert and establish in the lateral wall at both ends about frame (2), the nut on No. three lead screw (13) inlays and establishes in the lateral wall of frame (2) the left and right sides, and the inside wall fixed connection with frame.

5. The orthopedic care traction frame of claim 4, wherein: a plurality of grooves (16) are equidistantly distributed on the outer side walls of the left side and the right side of the frame (2), positioning pins (18) penetrate through the support columns (17) and are inserted into the grooves (16), and the lower ends of the support columns (17) are respectively fixed at the left end and the right end of the upper side wall of the base (1).