CN219859068U - Cable conveying device - Google Patents

Abstract

The utility model provides a cable conveying device, comprising: the movable base is provided with a lap joint surface formed on the top surface, a first end and a second end which are oppositely arranged along the extending direction, and the lap joint surface is used for lap joint of the cable lap joint surface; the driving assembly is arranged on the movable base and comprises a driving wheel which is positioned above the lap joint surface and rotates relative to the lap joint surface; the clamping assembly comprises a connecting part, an elastic part and a clamping part which are sequentially arranged, wherein the connecting part is arranged on the movable base, the clamping part is arranged above the lap joint surface, the clamping part and the driving wheel are distributed at intervals along the height direction, the distance between the clamping part and the driving wheel is adjustable, the clamping part is matched with the driving wheel to clamp and drive the cable to move to the second end along the first end of the lap joint surface, and the elastic part is used for providing acting force close to or far away from the driving wheel for the clamping part. The technical scheme provided by the utility model can solve the problems of high labor consumption and high labor intensity when the cable is pulled manually in the prior art and the pulling distance is long.

Description

Cable conveying device

Technical Field

The utility model relates to the technical field of conveying equipment, in particular to a cable conveying device.

Background

The rubber sleeve cable is a flexible and movable cable variety which takes a plurality of strands of fine copper wires as conductors and is covered with rubber insulation and a rubber sheath, is used for underground mining working surfaces of coal mines, and has the advantages of fire prevention, flame retardance, insulation and environmental protection. However, the tensile strength of the rubber sheath cable is low, and the cable cannot be pulled by mechanical equipment such as a winch. When the cable collar is used, a plurality of personnel are needed to cooperate, in the prior art, the cable is usually pulled out of the cable warehouse manually and is bent to be transported to the mine car by a disc, but when the pulling distance is long, the labor is wasted, and the labor intensity is high.

Disclosure of Invention

The utility model provides a cable conveying device, which aims to solve the problems of high labor consumption and high labor intensity when a cable is manually pulled and conveyed for a long distance in the prior art.

The present utility model provides a cable conveying device, comprising: the cable splicing device comprises a movable base, a cable splicing device and a cable splicing device, wherein the top surface of the movable base forms a splicing surface, the splicing surface is provided with a first end and a second end which are oppositely arranged along the extending direction, and the splicing surface is used for splicing the cable; the driving assembly is arranged on the movable base and comprises a driving wheel, the driving wheel is positioned above the lap joint surface, and the driving wheel can rotate relative to the lap joint surface; the clamping assembly comprises a connecting part, an elastic part and a clamping part which are sequentially arranged, wherein the connecting part is arranged on the movable base, the clamping part is arranged above the lap joint surface, the clamping part and the driving wheel are distributed at intervals along the height direction, the distance between the clamping part and the driving wheel is adjustable, the clamping part is matched with the driving wheel to clamp and drive the cable to move to the second end of the lap joint surface along the first end of the lap joint surface, and the elastic part is used for providing acting force close to or far away from the driving wheel for the clamping part.

Further, the connecting portion includes: a fixed part arranged on the movable base; and the extending direction of the adjusting part is the same as the moving direction of the clamping part, the adjusting part is in threaded connection with the fixing part, and one end, far away from the clamping part, of the elastic part is connected with the adjusting part.

Further, the clamping part is detachably connected with the elastic part.

Further, the clamping part comprises a first section, a second section and a third section which are sequentially arranged along the extending direction, the diameter of the second section is larger than that of the first section, the diameter of the second section is larger than that of the third section, one end, far away from the second section, of the first section is used for being matched with the driving wheel to clamp a cable, and the first end of the elastic part is sleeved on the third section and is in butt joint with the end face, far away from the first section, of the second section.

Further, the end face of one end, far away from the second section, of the first section is an arc face, the axial direction of the arc face is the same as the extending direction of the lap joint face, and the arc face is matched with the peripheral face of the cable.

Further, the driving assembly and the clamping assembly are matched to form a conveying assembly, and a plurality of groups of conveying assemblies are arranged at intervals along the extending direction of the movable base.

Further, the height of the second end of the faying surface is adjustable.

Further, the mobile base includes: the bottom of the bottom plate is provided with universal wheels; the bottom end of the conveying frame is hinged with the bottom plate, the top surface of the conveying frame forms a lap joint surface, and the height of the top end of the lap joint surface is adjustable; the bottom of telescopic portion and the bottom of carriage are along the length direction interval distribution of bottom plate, and the bottom of telescopic portion is articulated to be set up with the bottom plate, and the top of telescopic portion is articulated to be set up with the top of carriage, and the length of telescopic portion is adjustable in order to adjust the height on the top of overlap joint face.

Further, the telescoping portion includes: the bottom end of the first pipe body is hinged with the bottom plate; the bottom end of the second pipe body is penetrated in the opening at the top end of the first pipe body and is in sliding fit with the first pipe body, and the top end of the second pipe body is hinged with the conveying frame; the locking piece, first body and second body pass through the locking piece and connect.

Further, the carrier includes: the bottom end of the rectangular frame is hinged with the bottom plate, and the top end of the rectangular frame is hinged with the top end of the telescopic part; the length direction of the conveying rollers is perpendicular to the length direction of the rectangular frame, the conveying rollers are distributed at intervals along the extending direction of the rectangular frame, the conveying rollers are rotatably arranged on the rectangular frame, and the peripheral surfaces of the conveying rollers form a lap joint surface.

By adopting the technical scheme of the utility model, the cable can be conveniently moved by arranging the driving component and the clamping component which are matched with each other on the movable base, so that the situation that the cable is manually pulled by a worker in the traditional technical scheme is avoided. Specifically, when the cable is required to be coiled to the mine car or the appointed position, the movable base is moved to a proper position, one end part of the cable is placed on the lapping surface and is positioned between the driving wheel and the clamping part, the distance between the clamping part and the driving wheel is adjusted, the clamping part and the driving wheel clamp the cable together, the driving assembly is started, the driving wheel rotates relative to the lapping surface, the driving wheel rotates to drive the cable to move along the first end of the lapping surface to the second end under the action of friction force between the clamping part and the driving wheel, the movable base is moved to the mine car or the appointed position while the driving assembly works according to the actual working condition of the site, and the cable positioned at the second end of the lapping surface is gradually coiled to the mine car or the appointed position. In the traditional technical scheme, the cable is conveyed only through the mode that a plurality of staff pull the cable together, and when the pull distance is longer, the labor is consumed and the labor intensity is high. Compared with the traditional mode of pulling the cable by a person, the cable conveying device is arranged, and the cable is conveyed mainly through the cooperation of the movable base and the driving assembly arranged on the movable base and the clamping assembly, so that the labor intensity of workers is greatly reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic structural diagram of a cable conveying device provided by the utility model;

fig. 2 shows a schematic structural view of a clamping assembly provided by the utility model.

Wherein the above figures include the following reference numerals:

10. a driving wheel;

20. a clamping assembly; 21. a connection part; 211. a fixing part; 212. an adjusting section; 22. an elastic part; 23. a clamping part;

1. a bottom plate; 2. a carriage; 3. and a telescopic part.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a cable transport device including a moving base, a driving assembly, and a clamping assembly 20. The top surface of the movable base forms a lap joint surface, the lap joint surface is provided with a first end and a second end which are oppositely arranged along the extending direction, and the lap joint surface is used for lap joint of the cable; the driving assembly is arranged on the movable base and comprises a driving wheel 10, the driving wheel 10 is positioned above the lap joint surface, and the driving wheel 10 can rotate relative to the lap joint surface; the clamping assembly 20 comprises a connecting portion 21, an elastic portion 22 and a clamping portion 23 which are sequentially arranged, the connecting portion 21 is arranged on the movable base, the clamping portion 23 is located above the lap joint surface, the clamping portion 23 and the driving wheel 10 are distributed at intervals in the height direction, the distance between the clamping portion 23 and the driving wheel 10 is adjustable, the clamping portion 23 is matched with the driving wheel 10 to clamp and drive a cable to move to the second end of the lap joint surface along the first end of the lap joint surface, and the elastic portion 22 is used for providing acting force close to or far away from the driving wheel 10 for the clamping portion 23.

By adopting the technical scheme of the utility model, the cable can be conveniently moved by arranging the driving component and the clamping component 20 which are matched with each other on the movable base, and the situation that the cable is manually pulled by a worker in the traditional technical scheme is avoided. Specifically, when the cable is required to be wound to the mine car or the designated position, the movable base is moved to a proper position, one end of the cable is placed on the lap surface and is positioned between the driving wheel 10 and the clamping part 23, the distance between the clamping part 23 and the driving wheel 10 is adjusted, the clamping part 23 and the driving wheel 10 clamp the cable together, the driving assembly is started, the driving wheel 10 rotates relative to the lap surface, the driving wheel 10 rotates to drive the cable to move along the first end to the second end of the lap surface under the action of friction force between the clamping part 23 and the driving wheel 10, the movable base is moved to the mine car or the designated position while the driving assembly works according to the actual working condition of the site, and the cable positioned at the second end of the lap surface is gradually wound to the mine car or the designated position. In the traditional technical scheme, the cable is conveyed only through the mode that a plurality of staff pull the cable together, and when the pull distance is longer, the labor is consumed and the labor intensity is high. Compared with the traditional mode of pulling the cable by a person, the device provided by the utility model has the advantages that the cable is conveyed mainly through the cooperation of the movable base and the driving component arranged on the movable base and the clamping component 20, so that the labor intensity of workers is greatly reduced.

Specifically, the elastic portion 22 is a spring assembly, and other elastic materials that provide a force to the clamping portion 23 toward or away from the driving wheel 10 may be used as long as the force to the clamping portion 23 toward or away from the driving wheel 10 can be provided.

The driving wheel 10 may be disposed above the clamping portion 23, or the driving wheel 10 may be disposed below the clamping portion 23, and in this embodiment, the driving wheel 10 is disposed above the clamping portion 23. Specifically, the cable conveying device further comprises a mounting plate, the mounting plate is arranged on the movable base, the driving assembly further comprises a motor, the motor is arranged on the mounting plate, the motor is in driving connection with the driving wheel to enable the driving wheel to rotate, the axial direction of the driving wheel 10 is the same as the width direction of the lap joint surface, and the driving wheel 10 is located above the clamping part 23.

As shown in fig. 2, in the present utility model, the connection part 21 includes a fixing part 211 and an adjusting part 212, wherein the fixing part 211 is disposed on the moving base, the extending direction of the adjusting part 212 is the same as the moving direction of the clamping part 23, that is, the extending direction of the adjusting part 212 is the vertical direction, the adjusting part 212 is screwed with the fixing part 211, and one end of the elastic part 22 away from the clamping part 23 is connected with the adjusting part 212. Through above-mentioned design, fixed part 211 sets up on removing the base, and adjustment part 212 can cooperate with fixed part 211 in order to adjust the distance of elastic part 22 and clamping part 23 for drive wheel 10, so can provide the centre gripping effect to the cable of different diameters to realize the transportation to the cable of different diameters, promoted the adaptability of this device.

In this embodiment, the telescopic direction of the elastic portion is the vertical direction, the fixing portion 211 is provided with a vertical threaded through hole, the adjusting portion 212 includes an adjusting screw and a stop portion sequentially arranged along the axial direction, the diameter of the stop portion is larger than that of the adjusting screw, the adjusting screw is threaded in the threaded through hole and is in threaded connection with the threaded through hole, the stop portion is located at one end of the fixing portion 211, which is close to the elastic portion 22, and one end, far away from the clamping portion 23, of the elastic portion 22 is connected with the end face, far away from one end of the adjusting screw, of the stop portion. So arranged, it is simple in structure and convenient to adjust the spacing between the elastic portion 22 and the clamping portion 23 and the driving wheel 10 by the adjusting portion 212.

Further, one end threaded connection that keeps away from the backstop portion of adjusting screw has the backstop piece, and backstop piece and adjusting screw threaded connection set up so, can be convenient for assemble fixed part 211 and adjusting part 212 to, above-mentioned setting makes backstop portion and backstop piece respectively with the up end and the lower terminal surface backstop cooperation of fixed part 211, in order to restrict adjusting screw's removal stroke, prevents that adjusting screw and fixed part 211 from taking place the condition of breaking away from each other.

Further, the clamping portion 23 is detachably connected to the elastic portion 22. Through setting up clamping part 23 and elastic part 22 to detachable the connection, can make things convenient for the dismantlement of clamping part 23 and change not unidimensional clamping assembly, adapt to the cable transportation of different diameters, provide the centre gripping for not unidimensional cable.

Specifically, the clamping portion 23 includes a first section, a second section and a third section that set gradually along the extending direction, the diameter of the second section is larger than that of the first section, the diameter of the second section is larger than that of the third section, one end of the first section away from the second section is used for being matched with the driving wheel 10 to clamp the cable, and the first end of the elastic portion 22 is sleeved on the third section and is in butt fit with the end face of the second section away from the first section. In this embodiment, the elastic portion 22 is a spring, the first end of the spring is sleeved on the third section and is in abutting fit with the end face of the second section, which is far away from the section, and the second end of the spring is connected with the adjusting portion 212. And the third section can play the effect of direction to the spring, reduces the condition that the spring stretches out and draws back the in-process and takes place the slope, guarantees the stability of spring stretch out and draw back the in-process.

In the utility model, the end face of one end of the first section far away from the second section is an arc surface, the axial direction of the arc surface is the same as the extending direction of the lap joint surface, and the arc surface is matched with the peripheral surface of the cable. Through above-mentioned design, can increase the area of contact of clamping part 23 and cable, play the effect of compressing tightly the cable to above-mentioned setting can prevent that the outward flange of clamping part 23 from causing wearing and tearing to the cable in the cable transportation, reduces cable life.

In one embodiment of the present utility model, the drive assembly and the clamp assembly 20 cooperate to form a transport assembly having a plurality of sets spaced apart along the extension of the mobile base. Through above-mentioned design, multiunit conveying component drives the cable jointly and removes, can guarantee the stability of conveying cable. Meanwhile, the plurality of groups of conveying components are arranged, so that the single conveying component can be prevented from malfunctioning, the cable conveying device cannot work continuously, and the conveying stability is ensured.

By the technical scheme of the utility model, the height of the second end of the lap surface is adjustable. Through setting the height of the second end of the overlap joint face to an adjustable form, the cable conveying device can adapt to the requirements of different transportation conditions, and in actual production work, the height of the mine car is different, and the height position change of the second end of the overlap joint face is adjusted to meet the requirements of the mine car with different heights.

As shown in fig. 1, in the present utility model, the moving base includes a base plate 1, a carriage 2, and a telescopic portion 3. Wherein, the bottom of bottom plate 1 is provided with the universal wheel, and the bottom plate 1 of carriage 2 are articulated, and the top surface of carriage 2 forms the overlap joint face, and the height-adjustable on the top of overlap joint face, the bottom of telescopic portion 3 and the bottom of carriage 2 follow the length direction interval distribution of bottom plate 1, and the bottom of telescopic portion 3 is articulated to be set up with bottom plate 1, and the top of telescopic portion 3 is articulated to be set up with the top of carriage 2, and the height on the top of overlap joint face is adjusted to the length-adjustable of telescopic portion 3. Through the arrangement, the base plate 1 can realize the movement of the movable base through the universal wheels arranged at the bottom, so that the movable base can adapt to complex transportation working conditions, and the angle between the conveying frame 2 and the base plate 1 can be adjusted through the telescopic part 3, so that the height of the second end of the lap joint surface can be adjusted to meet the requirements of mine cars with different heights.

Specifically, the telescoping portion 3 includes a first tube, a second tube, and a locking member. Wherein, the bottom of first body is articulated with bottom plate 1 setting, and the bottom of second body wears to establish in the opening on the top of first body, and with first body sliding fit, the top of second body is articulated with carriage 2, and first body and second body pass through the retaining member and are connected. Through the design, the first pipe body and the second pipe body relatively slide to adjust the whole length of the telescopic part 3, and the height of the top end of the conveying frame 2 can be adjusted through the arrangement. And retaining member, first body and second body complex mode, its simple structure, and the convenience of operation is stronger. In this embodiment, be provided with a plurality of screw holes on the global of second body, a plurality of screw holes are along the axis direction interval distribution of second body, and the retaining member is the lock bolt, and the lock bolt passes first body and with screw hole threaded connection in order to realize the fixed to first body and second body.

In other embodiments of the present utility model, the telescopic portion 3 may include a plurality of tubes, and the plurality of tubes simultaneously cooperate with adjusting the angle adjustment in the height direction of the carriage 2. Or the telescopic part 3 can be set as a hydraulic cylinder, when the telescopic part 3 is the hydraulic cylinder, the base of the hydraulic cylinder is arranged on the bottom plate 1, and the top of the telescopic rod of the hydraulic cylinder is hinged with the top end of the conveying frame 2.

In the present utility model, the carriage 2 includes a rectangular frame and a plurality of conveying rollers. Wherein, rectangular frame's bottom is articulated with bottom plate 1, rectangular frame's top is articulated with the top of telescopic portion 3, and the length direction of conveying roller is perpendicular with rectangular frame's length direction, and a plurality of conveying rollers are along rectangular frame's extending direction interval distribution, and conveying roller rotationally sets up on rectangular frame, and the global overlap joint face that forms of a plurality of conveying rollers. Through the design, the cable can drive the conveying roller to move in the transportation process, so that the resistance in the transportation process is reduced.

Further, the first end and the second end of the overlap surface are respectively provided with a group of vertical rollers which are correspondingly arranged, and a channel for the cable to pass through is formed between the group of vertical rollers which are matched with each other so as to restrict the position of the cable in the movement process and prevent the cable from sliding out.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A cable transportation device, characterized in that the cable transportation device comprises:

the cable splicing device comprises a movable base, a cable splicing device and a cable splicing device, wherein the top surface of the movable base forms a splicing surface, the splicing surface is provided with a first end and a second end which are oppositely arranged along the extending direction, and the splicing surface is used for splicing the cable;

the driving assembly is arranged on the movable base and comprises a driving wheel (10), the driving wheel (10) is positioned above the lap joint surface, and the driving wheel (10) can rotate relative to the lap joint surface;

clamping assembly (20), including connecting portion (21), elastic component (22) and clamping part (23) that set gradually, connecting portion (21) set up on the removal base, clamping part (23) are located the top of overlap joint face, just clamping part (23) with drive wheel (10) are along direction of height interval distribution, clamping part (23) with interval between drive wheel (10) is adjustable, clamping part (23) with drive wheel (10) cooperation is in order to centre gripping and drive the cable is followed the first end of overlap joint face removes to the second end of overlap joint face, elastic component (22) are used for clamping part (23) provide be close to or keep away from effort of drive wheel (10).

2. The cable transportation device according to claim 1, wherein the connection portion (21) comprises:

a fixed part (211) arranged on the movable base;

and an adjusting part (212), wherein the extending direction of the adjusting part (212) is the same as the moving direction of the clamping part (23), the adjusting part (212) is in threaded connection with the fixing part (211), and one end, far away from the clamping part (23), of the elastic part (22) is connected with the adjusting part (212).

3. Cable transportation device according to claim 2, wherein the clamping portion (23) is detachably connected to the elastic portion (22).

4. A cable transportation device according to claim 3, characterized in that the clamping part (23) comprises a first section, a second section and a third section arranged in sequence along the extending direction, the diameter of the second section is larger than that of the first section, the diameter of the second section is larger than that of the third section, one end of the first section away from the second section is used for being matched with the driving wheel (10) to clamp the cable, and the first end of the elastic part (22) is sleeved on the third section and is in abutting fit with the end face of the second section away from the first section.

5. The cable transportation device according to claim 4, wherein an end surface of the first section, which is far from the end of the second section, is an arc surface, an axial direction of the arc surface is the same as an extending direction of the joint surface, and the arc surface is adapted to a peripheral surface of the cable.

6. Cable transportation device according to claim 1, wherein the drive assembly and the clamping assembly (20) cooperate to form a transportation assembly, which transportation assembly is provided with a plurality of groups spaced apart along the extension direction of the mobile base.

7. The cable transportation device of claim 1, wherein the height of the second end of the landing surface is adjustable.

8. The cable transportation device of claim 7, wherein the mobile base comprises:

the base plate (1), the bottom of the base plate (1) is provided with universal wheels;

the bottom end of the conveying frame (2) is hinged with the bottom plate (1), the top surface of the conveying frame (2) forms the lap joint surface, and the height of the top end of the lap joint surface is adjustable;

the telescopic part (3), the bottom of telescopic part (3) with the bottom of carriage (2) is followed the length direction interval distribution of bottom plate (1), the bottom of telescopic part (3) with bottom plate (1) articulates the setting, the top of telescopic part (3) with the top of carriage (2) articulates the setting, the length adjustable of telescopic part (3) is with the height of the top of overlap joint face.

9. The cable transportation device according to claim 8, wherein the telescoping part (3) comprises:

the bottom end of the first pipe body is hinged with the bottom plate (1);

the bottom end of the second pipe body is arranged in the opening at the top end of the first pipe body in a penetrating way and is in sliding fit with the first pipe body, and the top end of the second pipe body is hinged with the conveying frame (2);

the locking piece, first body with the second body is through the locking piece connects.

10. Cable transportation device according to claim 8, wherein the carriage (2) comprises:

the bottom end of the rectangular frame is hinged with the bottom plate (1), and the top end of the rectangular frame is hinged with the top end of the telescopic part (3);

the length direction of the conveying rollers is perpendicular to the length direction of the rectangular frame, the conveying rollers are distributed at intervals along the extending direction of the rectangular frame, the conveying rollers are rotatably arranged on the rectangular frame, and the circumferential surfaces of the conveying rollers form the lap joint surface.