CN115818393A - Elevator guide rail installation auxiliary frame - Google Patents

Abstract

The invention relates to the field of elevator guide rail auxiliary installation equipment, and discloses an elevator guide rail installation auxiliary frame. Two sliding arms, one end of the sliding arm is slidably connected with the support rod; a limiting component for limiting the sliding displacement of one end of the sliding arm along the supporting rod; and a clamping component corresponding to the sliding arm, the clamping component and the sliding The other end of the arm is fixedly connected, and the clamping assembly is used to clamp the guide rail. The invention reduces the construction process in the prior art, and can realize the one-time installation and positioning problem of the guide rail, thereby improving the installation efficiency of the elevator guide rail.

Description

Elevator guide rail installation auxiliary frame

technical field

The invention relates to the field of elevator guide rail auxiliary installation equipment, in particular to an elevator guide rail installation auxiliary frame.

Background technique

The guide rails of an elevator are generally installed in sections. The size and position of the guide rails need to be constructed in strict accordance with the drawings, and the guide rails must be kept parallel. The overall error requirements are very strict, otherwise it will affect the normal operation of the elevator and the life of the elevator. And it may bring security risks.

The common method that existing elevator guide rail is installed is, at first utilizes expansion bolt to install guide rail bracket in elevator well, then guide rail is installed on guide rail bracket, and guide rail utilizes calibration guide ruler to correct. The elevator guide rail calibration guide is a tool used to correct the elevator guide rail. In the traditional elevator installation process, it is often necessary to use the elevator guide rail calibration guide to correct the verticality, track distance and skew of the elevator guide rail. During use Scaffolding needs to be set up first, and the scaffolding should be used as an installation platform to install and correct the guide rails. However, the method of calibrating the guide rails by using the elevator guide rails to correct the guide rails cannot realize the one-time installation and positioning of the guide rails. It is necessary to repeatedly tap the guide rail brackets with tools such as hammers to adjust the guide rails. location, the construction process is very cumbersome and the installation efficiency is low.

In view of the above, how to solve the problems of cumbersome construction process in the prior art, the inability to realize one-time installation and positioning of the guide rail, and low installation efficiency have become technical problems urgently needed to be solved by those skilled in the art.

Contents of the invention

In order to overcome the above disadvantages, the present invention aims to provide an auxiliary frame for elevator guide rail installation, so as to reduce the construction process in the prior art and realize the one-time installation and positioning of the guide rail, thereby improving the installation efficiency of the elevator guide rail.

In order to achieve the above object, the technical solution of the present invention is: the elevator guide rail installation auxiliary frame, comprising:

A support frame arranged on the upper surface of the car roof, the support frame includes support rods arranged along the front and rear directions;

Two sliding arms respectively arranged on the front and rear sides of the guide rail, one end of the sliding arms is slidingly connected to the support rod;

a limiting assembly for limiting the sliding displacement of one end of the sliding arm along the supporting rod;

And a clamping assembly corresponding to the sliding arm one by one, the clamping assembly is fixedly connected with the other end of the sliding arm, and the clamping assembly is used to clamp the guide rail.

Further, the clamping assembly includes:

A clamping frame with a "匚"-shaped section, the clamping frame includes a clamping plate, a middle side plate and a fixing plate fixedly connected in sequence, the clamping plate and the fixing plate are arranged oppositely, and the middle side plate and the fixing plate are arranged oppositely. The other end of the sliding arm is fixedly connected;

And a movable plate arranged between the clamping plate and the fixed plate, the movable plate cooperates with the clamping plate to clamp the adjustment surface of the guide rail.

Further, balls are arranged on the opposite surfaces of the clamping plate and the movable plate, and when the clamping plate and the movable plate cooperate to clamp the adjustment surface of the guide rail, the opposite surfaces of the clamping plate and the movable plate The balls on the guide rail are slidingly connected with the adjustment surface of the guide rail.

Further, the side of the fixed plate close to the guide rail is provided with the ball

Further, the ball is penetrated by a needle roller, the ball and the needle are rotatably connected, and the needle is arranged through the center of the ball in the horizontal direction, the clamping plate, the movable plate and the fixed plate are all The two ends of the needle rollers are embedded and installed, and the balls protrude from the clamping plate, the movable plate and the fixed plate.

Further, a slider is provided at one end of the movable plate close to the middle side plate, and a chute arranged along the left and right direction is arranged on the surface of the middle side plate close to the movable plate, and the slider is slidably connected with the chute, A first bolt is threaded on the fixed plate, and the first bolt is extended toward the movable plate.

Further, the sliding arm includes a first sliding arm and a second sliding arm, the first sliding arm is arranged along the left-right direction, one end of the first sliding arm is slidably connected to the support rod, and the first sliding arm The other end of the arm is fixedly connected with one end of the second sliding arm, the second sliding arm is arranged along the front-rear direction, and the other end of the second sliding arm is fixedly connected with the surface of the middle side plate away from the movable plate.

Further, the limit assembly includes:

Two limit blocks arranged between the two first sliding arms, the two limit blocks are sleeved on the peripheral side of the support rod and slidably connected with the support rod;

A second bolt that is threadedly connected to the limiting block one by one, and the second bolt can pass through the limiting block and abut against the support rod;

And a third bolt and a nut, the third bolt runs through the two first sliding arms and is threadedly connected with the nut.

Further, the support frame also includes:

Two vertical rods, the upper ends of the two vertical rods are respectively fixedly connected to the two ends of the support rod;

And two cross bars corresponding to the two vertical bars one by one, one end of the cross bar is fixedly connected to the lower end of the vertical bar, and the other end of the cross bar is detachable from the upper surface of the car roof. connect.

Further, the guide rail is arranged between the two cross bars, and the support rod is arranged on the side of the guide rail away from the car, and a plurality of the guide rails are symmetrically arranged on the left and right sides of the car , and a plurality of guide rails are slidingly connected with the car.

Compared with the prior art, the present invention has at least the following advantages:

When in use, complete the installation process of the first guide rail according to the traditional installation method, and install the car on the first guide rail, and connect it with the pulley of the machine room through a steel wire rope, and then install the elevator guide rail installation auxiliary frame of the present invention above the car , under the premise of ensuring that the car slides on the installed guide rail, lift the car, cooperate with the use of the limit component and use the clamping component to clamp the upper guide rail to be installed, and realize the fixing process of the guide rail installation position. The one-time positioning process of the guide rail can be realized without repeated adjustment of the guide rail. At this time, the fixing work between the guide rail bracket and the guide rail can be carried out. The installation process of the guide rail can be realized by repeating the above operation. The whole process does not need to build a hand frame. The staff can realize the installation process of the guide rail on the top of the car, reducing the construction steps, and the whole process does not need to repeatedly correct the position of the guide rail, which can realize one-time positioning and improve the construction efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is the effect diagram of the use state of the elevator guide rail installation auxiliary frame of the present invention;

Fig. 2 is the partially enlarged view of A region in Fig. 1 of the present invention;

Fig. 3 is a schematic diagram of the overall structure of the elevator guide rail installation auxiliary frame of the present invention;

Fig. 4 is a schematic structural view of the clamping assembly of the present invention;

Fig. 5 is a structural schematic diagram of another direction of the clamping assembly of the present invention.

Reference signs: 1. Support rod; 2. Vertical rod; 3. Cross bar; 4. First sliding arm; 5. Second sliding arm; 6. Clamping plate; 7. Middle side plate; 8. Fixed plate; 9. movable plate; 10. ball; 11. needle roller; 12. slider; 13. chute; 14. first bolt; 15. limit block; 16. second bolt; 17. third bolt; 18. The fourth bolt; 19, guide rail; 20, car; 21, pulley; 22, driving motor.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figures 1-3, the present invention provides an elevator guide rail installation auxiliary frame, which is applied to the auxiliary installation of the T-shaped guide rail 19 of the elevator. The guide rail 19 includes an adjustment surface arranged along the front and rear directions, and the adjustment surface is used for fixing between the guide rail bracket. The guide rail 19 is also provided with a clamping surface extending in the left-right direction, and the clamping surface is used for sliding connection with the car 20 .

The invention specifically includes a support frame, a sliding arm, a limiting component and a clamping component. Wherein, the support frame is arranged on the top surface of the car 20 roof, the support frame includes a support rod 1, two vertical rods 2 and two cross bars 3, the support rod 1 is arranged along the front and rear direction, and the two ends of the support rod 1 are respectively connected to the two The upper end of the vertical rod 2 is fixedly connected, and the two horizontal rods 3 are arranged in correspondence with the two vertical rods 2 one by one. Surface detachable connection. Specifically, the other end of the cross bar 3 is provided with a mounting hole, and a fourth bolt 18 is installed in the mounting hole. The fourth bolt 18 penetrates the mounting hole and is detachably connected to the top plate of the car 20. The size of the mounting hole is larger than that of the fourth bolt 18. The diameter of the screw rod can be adjusted by adjusting the contact position of the mounting hole and the fourth bolt 18 along the left and right directions of the two cross bars 3 .

Two sliding arms are respectively arranged on the front and rear sides of the guide rail 19 , one end of the sliding arm is slidably connected to the support rod 1 , and the other end of the sliding arm is fixedly connected to the clamping assembly. Specifically, the sliding arm includes a first sliding arm 4 and a second sliding arm 5 arranged in one-to-one correspondence, the first sliding arm 4 is arranged along the left-right direction, the second sliding arm 5 is arranged along the front-back direction, and one end of the first sliding arm 4 It is slidably connected with the support rod 1, the other end of the first sliding arm 4 is fixedly connected with one end of the second sliding arm 5, and the other end of the second sliding arm 5 is fixedly connected with the clamping assembly.

The limit assembly is used to limit the sliding displacement of one end of the first sliding arm 4 along the support rod 1 . Specifically, the limiting assembly includes a limiting block 15, a second bolt 16 and a third bolt 17, the number of limiting blocks 15 is two, and the two limiting blocks 15 are arranged between the two first sliding arms 4, Two limit blocks 15 are sleeved on the side of the support rod 1 and are slidably connected with the support rod 1. Second bolts 16 are installed on the limit blocks 15 in one-to-one correspondence. The second bolts 16 can pass through the limit block 15 and connect with the support Rod 1 is abutted, and the second bolt 16 is rotated in the direction close to the support rod 1 so that the second bolt 16 is in contact with the support rod 1. At this time, the corresponding limit block 15 will not be able to move along the extension direction of the support rod 1, that is, the limit The block 15 and the support rod 1 maintain a relatively static positional relationship, the third bolt 17 is arranged through the two first sliding arms 4 , and the third bolt 17 is threaded through the two first sliding arms 4 to be connected with nuts. During use, by rotating the second bolt 16 in a direction close to the support rod 1, the two stoppers 15 remain relatively stationary with the support rod 1, and the two first sliding arms 4 are moved close to each other by adjusting the position of the nut, and move to the same position as the support rod 1. The abutment of the limit block 15 can realize that the first sliding arm 4 is in a static state relative to the car 20 , thereby realizing the process of fixing the position of the first sliding arm 4 . On the contrary, releasing the locking of the nut, or rotating the second bolt 16 in a direction away from the support rod 1 can realize the position adjustment of the first sliding arm 4 .

Referring to FIGS. 4-5 , the clamping assembly is fixedly connected to the other end of the second sliding arm 5 , and the clamping assembly is used to clamp the guide rail 19 . Specifically, the clamping assembly includes a clamping frame and a movable plate 9 . The cross-section of the clamping frame is "匚" shape, and the clamping frame includes a clamping plate 6, a middle side plate 7 and a fixed plate 8 fixedly connected in sequence, the clamping plate 6 and the fixed plate 8 are arranged oppositely, and the middle side plate 7 and the fixed plate 8 are arranged oppositely. The other end of the second sliding arm 5 is fixedly connected, and the movable plate 9 is arranged between the clamping plate 6 and the fixed plate 8, and the movable plate 9 and the clamping plate 6 cooperate with each other to clamp the adjustment surface of the guide rail 19, along the front and rear direction The two fixing plates 8 arranged oppositely are used for clamping the clamping surface of the guide rail 19 .

Optionally, balls 10 are arranged on the opposite surfaces of the clamping plate 6 and the movable plate 9, the number of the balls 10 is multiple, and multiple balls are distributed in a rectangular array on the opposite surfaces of the clamping plate 6 and the movable plate 9. The ball 10 is slidably connected with the adjustment surface of the guide rail 19 when the clamping plate 6 and the movable plate 9 cooperate to clamp the adjustment surface of the guide rail 19 .

In addition, balls 10 are also arranged on the side of the fixing plate 8 close to the guide rail 19 , and a row of balls 10 is arranged on the fixing plate 8 . When the two fixing plates 8 oppositely arranged along the front and rear directions clamp the clamping surface of the guide rail 19 , the balls 10 on the fixing plates 8 are slidably connected with the clamping surface of the guide rail.

Optionally, a needle roller 11 is provided through the ball 10, the ball 10 is connected to the needle roller 11 in rotation, the needle roller 11 is arranged through the center of the ball 10 in the horizontal direction, and the clamping plate 6, the movable plate 9 and the fixed plate 8 are all embedded The two ends of the needle roller 11 are installed, and the balls 10 protrude from the clamping plate 6, the movable plate 9 and the fixed plate 8. Such a design can ensure that when the clamping plate 6 and the movable plate 9 jointly clamp the adjustment surface of the guide rail 19, the clamping plate 6 and the movable plate 9 can and only slide relative to the adjustment surface of the guide rail 19 in the vertical direction; When the two fixing plates 8 oppositely arranged in the front and rear directions clamp the clamping surface of the guide rail 19 , the balls 10 on the fixing plates 8 and the clamping surface of the guide rail can slide relative to each other.

Preferably, the movable plate 9 is provided with a slide block 12 near one end of the middle side plate 7, and the surface of the middle side plate 7 near the movable plate 9 is provided with a chute 13 arranged along the left and right direction, and the slide block 12 is slidably connected with the chute 13, The threaded connection on the fixed plate 8 is provided by first bolts 14 , and the first bolts 14 extend toward the movable plate 9 . The number of the first bolts 14 is multiple, and the multiple first bolts 14 are threadedly connected with the fixing plate 8 in a rectangular array. Rotate the first bolt 14 in a direction close to the clamping plate 6 , and the first bolt 14 will push the movable plate 9 to move toward the clamping plate 6 .

In the present invention, the guide rails 19 are arranged on the left and right sides of the car 20 , and the guide rails 19 are slidably connected with the car 20 . And the guide rail 19 is arranged between the two cross bars 3 , and the support rod 1 is arranged on the side of the guide rail 19 away from the car 20 .

The use process of the elevator guide rail installation auxiliary frame of the present invention:

First, the first guide rails 19 on the left and right sides of the car 20 are installed respectively according to the construction method of traditional guide rails 19 installation, that is, the installation process of the two first guide rails 19 at the lowest position is completed. After the first guide rails 19 are installed Car 20 is installed on the first guide rail 19. After car 20 is installed, it is connected with the pulley 21 of the machine room by a wire rope (not shown in the figure), and the pulley 21 is connected with the drive motor 22 of the machine room.

Secondly, the elevator guide rail installation auxiliary frame of the present invention is initially assembled, and the elevator guide rail installation auxiliary frame of the present invention is installed on the top of the car 20. By adjusting the height of the car 20, it is ensured that the support rod 1 is located at the corresponding position of the first guide rail 19. On the top of all guide rail brackets, when installing the cross bar 3, it should be ensured that the adjustment surface of the guide rail 19 is located between the movable plate 9 and the clamping plate 6, and the ball 10 on the clamping plate 6 is connected to the adjustment surface of the first guide rail 19. offset. By adjusting the position of the first sliding arm 4, the ball 10 on the fixed plate 8 abuts against the clamping surface of the first guide rail 19. At this time, the second bolt 16 is rotated in the direction close to the support rod 1 to realize the limit block 15 The position of the first sliding arm 4 is adjusted by adjusting the position of the nut so that the two first sliding arms 4 are close to each other.

Again, move the car 20 upwards to ensure that the car 20 is slidably connected to the first guide rail 19, and ensure that the support rod 1 is located above the movable frame of the second guide rail 19, and adjust the position of the nut to release the third bolt 17 against the first sliding arm. 4, the second guide rail 19 is placed directly above the first guide rail 19 by hoisting, and the position limit of the first sliding arm 4 by the third bolt 17 is restored by adjusting the position of the nut again, so that the two fixed The plate 8 is close to the clamping surface of the second guide rail 19 to realize the front and rear direction limit of the second guide rail 19; the movable plate 9 is moved close to the clamping plate 6 by screwing the first bolt 14, and further the movable plate 9 and the clamping plate 6 are moved. The clamping plate 6 jointly clamps the adjustment surface of the second guide rail 19, thereby realizing the limit to the left and right directions of the second guide rail; at this time, the one-time positioning process of the second guide rail 19 is realized, and the second guide rail can be adjusted. 19 is fixed with corresponding lowest place guide rail support, continues to lift car 20, and the regulating surface of ball 10 and second guide rail 19 slides relatively, can realize the fixed work between second guide rail 19 and its corresponding other guide rail supports.

When installing the third guide rail 19, adjust the position of the nut to release the limit of the third bolt 17 to the first sliding arm 4, rotate the first bolt 14 along the direction away from the clamping plate 6 and control the movable plate 9 to move away from the clamping plate 6 , manually move the movable plate 9 away from the clamping plate 6, and hoist the third guide rail 19 above the second guide rail 19, and restore the limit of the third bolt 17 to the first sliding arm 4 by adjusting the position of the nut again , so that the two fixed plates 8 are close to the third guide rail 19 to adjust the clamping surface to realize the front and rear direction limit of the second guide rail 19; the movable plate 9 is moved close to the clamping plate 6 by screwing the first bolt 14, further The movable plate 9 and the clamping plate 6 jointly clamp the adjustment surface of the third guide rail 19, so as to realize the limit of the left and right direction of the third guide rail 19; at this time, the one-time positioning process of the third guide rail 19 is realized , by lifting the car 20, the fixing between the third guide rail 19 and the guide rail support can be realized. Repeat the above operations to complete the installation process of the remaining guide rails 19 .

It should be noted that the length of the vertical pole 2 should be greater than the distance between two adjacent guide rail supports in the vertical direction, and when installing between the guide rail support and the guide rail 19, the guide rail support should be located below the support bar 1, otherwise it will affect The ascent process of car 20.

In the present invention, after the installation of the first guide rail 19 is completed, the staff only need to stand above the car 20 to complete the installation process of other guide rails 19, during which no scaffolding is required, which reduces work steps and improves work efficiency. The middle side plate 7 realizes the clamping of the guide rail 19 in the front and rear direction, and the clamping of the guide rail 19 in the left and right direction is realized by using the movable plate 9 and the clamping plate 6. It is not necessary to adjust the position of the guide rail 19 by knocking, and one-time positioning can be realized process, and there is no need to adjust the positions of the movable plate 9 and the first sliding arm 4 during the installation of the same guide rail 19 and guide rail bracket, which improves the convenience in the construction process and effectively improves the installation efficiency.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It should not be construed as limiting the invention by implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation.

The above-mentioned embodiments are only to describe the preferred mode of the present invention, not to limit the scope of the present invention. Without departing from the design spirit of the present invention, those skilled in the art may make various Variations and improvements should fall within the scope of protection defined by the claims of the present invention.

Claims (10)

1. Elevator guide rail installation auxiliary frame, its characterized in that includes:

the support frame is arranged on the upper surface of a top plate of the lift car (20), and comprises a support rod (1) arranged along the front-back direction;

the two sliding arms are respectively arranged on the front side and the rear side of the guide rail (19), and one end of each sliding arm is connected with the support rod (1) in a sliding manner;

the limiting component is used for limiting one end of the sliding arm to slide and displace along the supporting rod (1);

and the clamping components are arranged in one-to-one correspondence with the sliding arms, the clamping components are fixedly connected with the other ends of the sliding arms, and the clamping components are used for clamping the guide rails (19).

2. The elevator guide rail mounting accessory of claim 1,

the clamping assembly comprises:

the clamping frame is in a '21274' shape in section, the clamping frame comprises a clamping plate (6), a middle side plate (7) and a fixing plate (8) which are fixedly connected in sequence, the clamping plate (6) and the fixing plate (8) are oppositely arranged, and the middle side plate (7) is fixedly connected with the other end of the sliding arm;

and the movable plate (9) is arranged between the clamping plate (6) and the fixed plate (8), and the movable plate (9) and the clamping plate (6) are mutually matched for clamping the adjusting surface of the guide rail (19).

3. The elevator guide rail mounting auxiliary frame according to claim 2, wherein the opposite faces of the clamping plate (6) and the movable plate (9) are provided with balls (10), and when the clamping plate (6) and the movable plate (9) are matched to clamp the adjusting face of the guide rail (19), the balls (10) on the opposite faces of the clamping plate (6) and the movable plate (9) are in sliding connection with the adjusting face of the guide rail (19).

4. Elevator guide rail mounting aid according to claim 3, characterized in that the side of the fixing plate (8) near the guide rail (19) is provided with the balls (10).

5. The elevator guide rail mounting auxiliary frame according to claim 4, wherein the balls (10) are provided with roller pins (11) in a penetrating manner, the balls (10) and the roller pins (11) are rotatably connected, the roller pins (11) are arranged in a horizontal direction through the center of the ball (10), the clamping plate (6), the movable plate (9) and the fixed plate (8) are embedded with two ends of the roller pins (11), and the balls (10) are arranged to protrude from the clamping plate (6), the movable plate (9) and the fixed plate (8).

6. The elevator guide rail mounting auxiliary frame according to claim 5, wherein a sliding block (12) is arranged at one end of the movable plate (9) close to the middle side plate (7), a sliding groove (13) arranged along the left-right direction is arranged on the surface of the middle side plate (7) close to the movable plate (9), the sliding block (12) is connected with the sliding groove (13) in a sliding manner, a first bolt (14) is connected to the fixed plate (8) in a threaded manner, and the first bolt (14) extends towards the movable plate (9).

7. The elevator guide rail installation auxiliary frame according to claim 6, wherein the sliding arm comprises a first sliding arm (4) and a second sliding arm (5), the first sliding arm (4) is arranged along the left-right direction, one end of the first sliding arm (4) is connected with the support rod (1) in a sliding manner, the other end of the first sliding arm (4) is fixedly connected with one end of the second sliding arm (5), the second sliding arm (5) is arranged along the front-back direction, and the other end of the second sliding arm (5) is fixedly connected with the surface of the middle side plate (7) far away from the movable plate (9).

8. The elevator guide rail mounting accessory of claim 7,

the spacing subassembly includes:

the two limiting blocks (15) are arranged between the two first sliding arms (4), and the two limiting blocks (15) are sleeved on the periphery of the supporting rod (1) and are in sliding connection with the supporting rod (1);

the second bolts (16) are in one-to-one corresponding threaded connection with the limiting blocks (15), and the second bolts (16) can penetrate through the limiting blocks (15) and abut against the supporting rod (1);

and the third bolt (17) and the nut are connected with the third bolt (17) through the two first sliding arms (4) in a threaded manner.

9. The elevator guide rail mounting accessory of claim 8,

the support frame still includes:

the upper ends of the two upright posts (2) are respectively fixedly connected with the two ends of the supporting rod (1);

and two horizontal poles (3) that pole setting (2) one-to-one set up, the one end of horizontal pole (3) with the lower extreme fixed connection of pole setting (2), the other end of horizontal pole (3) with car (20) roof upper surface can dismantle the connection.

10. The elevator guide rail mounting auxiliary frame according to claim 9, wherein the guide rail (19) is disposed between the two cross bars (3), the support rod (1) is disposed on a side of the guide rail (19) away from the car (20), the plurality of guide rails (19) are symmetrically disposed on left and right sides of the car (20), and the plurality of guide rails (19) are slidably connected with the car (20).

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