CN115434337A - Mine restoration is with dog carry device of hanging net - Google Patents

Abstract

The invention discloses a stop block mounting device of a hanging net for mine restoration, wherein the hanging net comprises a net body and a stop block hung on the net body; after the net body is paved on the surface of a mine to be repaired, the stop block is hung on the net body through the hanging device; the mounting device comprises a stopper pushing system and a stopper storage system; the stopper storage system is stacked and loaded with a plurality of stoppers which are abutted to each other, the stoppers can be conveyed to the stopper pushing system one by one, and more stoppers are carried in a stacking mode, so that the working efficiency is improved.

Description

Mine restoration is with dog carry device of hanging net

Technical Field

The invention relates to the technical field of mine restoration, in particular to a stop block mounting device of a hanging net for mine restoration.

Background

The exploration and development of mineral resources must comply with the laws and regulations of the state and province on environmental protection, land and the like, and insist on who develops and who protects; who destroyed, who compensated; who pollutes and who governs. In addition to the mines needing to be subsequently treated due to the development and the like, at present, a plurality of abandoned mines which are missed in history in China are in urgent need of repair treatment so as to avoid further water and soil loss and form large-area deserts, the area of the mines to be repaired is extremely large, hundreds of mines need to be repaired only in Qilian mountains, and the repair and treatment work is heavy and far.

The method comprises the steps of covering foreign soil on the surface of a mountain to be repaired in various forms or proportions, breeding, watering and maintaining, and improving the soil structure of the surface of a mine through plants after the plants germinate and grow to finally achieve the aim of restoring the green of the mine, wherein before covering the foreign soil, a hanging net is generally paved on the surface of the mine, so that the friction between the foreign soil and the mine is increased, and the risk of falling of the foreign soil due to water flow scouring is reduced.

The problems can be effectively solved by firstly paving the net body and then installing the stop blocks, particularly when the stop block hanging operation is carried out through a vehicle-type mechanism capable of automatically sliding down from a hillside, the installation efficiency is greatly improved, but due to the particularity of the shape of the stop blocks, the number of the stop blocks capable of being carried in the vehicle-type mechanism is limited, the vehicle-type mechanism is often deficient in mines with overlarge slope surface length, and the vehicle-type mechanism is required to repeatedly run on the same track; in addition, the running stability of the stop block in the mechanism of the type of the vehicle is also a key factor directly restricting the whole running efficiency, and in the existing mechanism of the type of the vehicle, the stop block may be blocked in running, the stop block is blocked, and the fault rate is high in long-term running.

Disclosure of Invention

In order to overcome the problems, the inventor of the present invention has conducted intensive research to design a stopper mounting device for a hanging net for mine restoration, wherein the hanging net comprises a net body and stoppers hung on the net body; the hanging device is used for hanging the stop block on the net body after the net body is paved on the surface of the mine to be repaired; the mounting device comprises a stopper pushing system and a stopper storage system; the stopper storage system is stacked and loaded with a plurality of stoppers which are abutted to each other, the stoppers can be conveyed into the stopper pushing system one by one, and more stoppers are carried in a stacking mode, so that the working efficiency is improved, and the invention is completed.

Specifically, the invention aims to provide a stopper mounting device for a mounting net for mine restoration,

the net comprises a net body 1 and a stop block 2 hung on the net body 1;

after the net body 1 is paved on the surface of a mine to be repaired, the stop block 2 is hung on the net body 1 through the hanging device 3;

the mounting device 3 comprises a stop block pushing system 4, a stop block storage system 5 and a pressing roller system 6;

wherein a plurality of blocks 2 abutting against each other are stacked and carried in the block storage system 5, and the blocks 2 can be conveyed to the block pushing system 4 one by one.

The stopper pushing system 4 and the stopper storage system 5 are both installed in a frame of the mounting device 3, and a traveling mechanism is arranged below the frame.

When the mounting device 3 moves a set distance, one stopper 2 is lowered through the stopper pushing system 4, and the stopper 2 is mounted on the net body 1.

Wherein the stopper storage system 5 comprises a mounting platform 51 and a storage box 52,

two sets of stopper fixing frames 511 are arranged on the mounting platform 51, and the two sets of stopper fixing frames 511 bear the stopper 2 together and can drive the stopper 2 to move in a reciprocating manner.

Wherein the storage box 52 is arranged right above the installation platform 51,

preferably, the storage box 52 includes a box body 521;

preferably, in the box 521, between two adjacent blocks, the edge of the block above passes through the mounting plate of the block below.

The bottom of the box 521 is provided with a turnover baffle 522, and the turnover baffle 522 can rotate in a reciprocating manner within an angle range of 90 to 100 degrees.

An avoidance driving member 523 and a locking mechanism 524 are further mounted on the box 521, wherein when the box 521 moves to the lowermost end, the avoidance driving member 523 controls the turnover baffle 522 to switch from the supporting state to the avoidance state;

the avoidance driving member 523 is controlled by the locking mechanism 524, so that the avoidance driving member 523 can release the control of the turning flap 522, and the turning flap 522 is automatically returned to the supporting state.

Wherein, the avoidance driving member 523 comprises a push plate 5231, a pressure bearing plate 5232 and a tail rod 5233 which are fixedly connected with each other into a whole,

the roll-over flapper 522 is pushed from below by the push plate 5231,

a first spring 5234 is provided between the pressure bearing plate 5232 and the case 521,

the bottom end of the tail rod 5233 extends out of the lower part of the box body 521, and a notch 5235 is formed in the tail rod 5233.

The locking mechanism 524 includes a base 5241 fixedly mounted on the box 521, a plug 5242 capable of sliding back and forth is provided on the base 5241, and the plug 5242 can be inserted into the notch 5235;

a second spring 5243 connected to a latch 5242 is further provided on the base 5241.

The compression roller system 6 is used for pressing the stopper 2 after the stopper 2 is hung on the net body 1, so that the hanging firmness of the stopper 2 is improved.

The invention has the advantages that:

(1) According to the stop block mounting device of the hanging net for mine restoration, provided by the invention, the shape characteristics of the stop blocks can be fully utilized, so that the stop blocks are embedded and mounted with each other, the space utilization rate of the storage of the stop blocks is improved to the maximum extent, and more stop blocks can be carried;

(2) According to the stop block mounting device for the hanging net for mine restoration, provided by the invention, the stop block can be fed into the transmission mechanism for the transmission mechanism to grasp and place, specifically, the stop block to be fed is fixed by arranging the stop block fixing frame, and only one stop block is fed at a time, so that the stable and smooth stop block grasping process is ensured;

(3) According to the stop block mounting device for the hanging net for mine restoration, which is provided by the invention, the conveying mode of the stop block is optimized, so that the energy loss caused by friction in the conveying process of the stop block can be reduced, and the risk of conveying blockage caused by the blockage of the stop block can also be reduced;

(4) According to the stop block mounting device for the hanging net for mine restoration, the stop blocks and the net body on the hanging net are stored, transported and laid respectively, so that the laying efficiency of the net body can be greatly improved, and the problem that the laying efficiency is reduced due to the fact that the stop blocks and the net body are entangled in the transporting and laying processes is solved;

(5) According to the stop block mounting device for the hanging net for mine restoration, the rapid mounting work of the stop block on the lowering path can be realized by lowering the mounting device from the top of the slope body, the working process is simple, and the operation is convenient;

(6) According to the block mounting device of the hanging net for mine restoration, provided by the invention, the cross section of the block is in a triangle-like shape, the structural stability is strong, the block is provided with the soil retaining plate, the floor pasting plate and the mounting plate, and the convenience of mounting and hanging, the stability after hanging and the supporting effect on the foreign soil are considered under the condition of enabling the structure to be simplest;

(7) According to the stopper mounting device for the hanging net for mine restoration, provided by the invention, the mounting pieces are arranged near the top ends of the stoppers and are controlled to move on the surface of the net body along the mine slope surface through the mounting devices, so that the mounting pieces are mounted on the cotton rope of the net body, the fixed mounting of the stoppers is realized, the mounting pieces can be bent and deformed, the firmness of the hanging pieces after the hanging pieces are mounted on the cotton rope can be ensured, the mounting efficiency can be fully improved due to the multiple rows of the mounting pieces, and the mounting task can be completed only by controlling the movement of the mounting pieces to a smaller distance;

(8) According to the block mounting device for the hanging net for mine restoration, the cam is used for controlling the transmission mechanism, the cam is arranged in a special profile shape, the cam rolls for one circle to control the transmission mechanism to complete complex continuous actions, the block is controlled to extend to a preset position, the block is driven to move to be hung on a net body, the transmission mechanism is retracted to grab a new block, and the transmission mechanism is retracted to facilitate the feeding system to return to the initial position and push the block to extend to the preset position;

(9) According to the stopper mounting device for the hanging net for mine restoration, the transmission shaft of the cam is connected with the roller, so that the cam can be driven only by the gravity action of the mounting device without arranging a power system such as a motor or a motor, the rotating speed of the cam is directly related to the actual moving speed of the mounting device, and the distance between the mounted stoppers can be kept constant even if the moving speed of the mounting device is adjusted in real time;

(10) According to the stop block mounting device for the hanging net for mine restoration, which is provided by the invention, the press roller system is arranged on the mounting device, and the stop block is pressed by the press roller system, so that the firmness of the stop block mounting is ensured, the stop block is prevented from being subsequently washed and moved, and the stability of the foreign soil sprayed by the spraying is further improved.

Drawings

Fig. 1 is a schematic view showing the overall structure of a wire net in a stopper mounting device for a wire net for mine restoration according to a preferred embodiment of the present invention;

fig. 2 is a schematic view showing the structure of a stopper of the stopper mounting device for a hanging net for mine restoration according to a preferred embodiment of the present invention;

fig. 3 is a side view of a stopper of the stopper mounting device for a suspended net for mine restoration according to a preferred embodiment of the present invention when the stopper is not mounted on the net body;

fig. 4 is a side view of a stopper of the stopper mounting device for a suspended net for mine restoration according to a preferred embodiment of the present invention, when mounted on a net body;

fig. 5 is a schematic view showing a stopper mounted on a stopper mounting device of a hanging net for mine restoration by a mounting device according to a preferred embodiment of the present invention;

fig. 6 is a schematic view showing the structure inside the stopper mounting device frame of the stopper mounting device for a mounting net for mine restoration according to a preferred embodiment of the present invention;

fig. 7 is a schematic structural view showing another angle in a stopper mounting device frame of the stopper mounting device for a mounting net for mine restoration according to a preferred embodiment of the present invention;

fig. 8 is a schematic structural view of a transmission mechanism of a stopper mounting device for a hanging net for mine restoration according to a preferred embodiment of the present invention with a housing removed;

fig. 9 is a schematic structural view showing a stopper pushing system in the stopper mounting device for a wire netting for mine restoration according to a preferred embodiment of the present invention;

fig. 10 is a schematic configuration view showing a stopper pushing system in the stopper mounting device for a wire rope for mine rehabilitation in preparation for gripping a stopper according to a preferred embodiment of the present invention;

fig. 11 is a schematic structural view showing a power mechanism in the stopper mounting device for a mounting net for mine restoration according to a preferred embodiment of the present invention;

fig. 12 is a schematic structural view showing a box body of a stopper mounting device for a hanging net for mine restoration according to a preferred embodiment of the present invention;

fig. 13 is a schematic configuration view showing a configuration in which a turn-over fence is in a retreated state in a storage box of a stopper mounting device for a hanging net for mine restoration according to a preferred embodiment of the present invention;

FIG. 14 is an enlarged view of a portion of FIG. 13, showing the inversion flap in an retracted position;

fig. 15 is a schematic structural view showing a structure of a retainer mounting device for a screen for mine restoration according to a preferred embodiment of the present invention, in which an inversion fence is supported on a storage box;

fig. 16 is a schematic structural view showing a dodging drive member on a storage box of a stopper mounting device for a suspended net for mine restoration according to a preferred embodiment of the present invention;

fig. 17 is a schematic structural view showing an on-bin locking mechanism of a stopper mounting device for a hanging net for mine restoration according to a preferred embodiment of the present invention;

fig. 18 is a schematic structural view showing a state where a storage box is separated from an installation platform in the stopper mounting device for a suspended net for mine restoration according to a preferred embodiment of the present invention;

fig. 19 is a schematic configuration diagram of a press roll unit in the stopper mounting device for a hanging net for mine restoration according to a preferred embodiment of the present invention.

The reference numbers illustrate:

1-net body

2-stop block

21-earth-retaining plate, 211-earth-retaining groove

22-sticking floor, 221-hanging piece, 222-bayonet

23-mounting plate

3-mounting device

31-roller

4-stop pushing system

41-straight rod

42-connecting shaft

43-connecting plate

44-magnetic block

46-cam, 461-first arc segment, 462-first upper transition, 463-second arc segment, 464-second upper transition, 465-first lower transition, 466-third upper transition, 467-second lower transition, 468-third arc segment, 469-third lower transition

47-drive shaft

48-ring groove

5-dog storage system

51-mounting platform, 511-block fixing frame, 512-sliding block

52-storage box, 521-tank, 522-roll-over flap,

523-avoidance driving piece, 5231-push plate, 5232-bearing plate, 5233-tail rod, 5234-spring I and 5235-notch groove

524-locking mechanism, 5241-base, 5242-latch, 5243 spring II, 5244 oscillating piece, 5245 pull rope

6-compression roller system

61-Upper Pin shaft

62-connecting rod

63-pinch roller

71-Limit baffle

72-detection switch

73-chute

74-hook port

Detailed Description

The invention is explained in more detail below with reference to the figures and examples. The features and advantages of the present invention will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

According to the stop block mounting device for the hanging net for mine restoration, the stop block 2 on the hanging net can be mounted on the net body 1, and the hanging net is shown in fig. 1 and comprises the net body 1 and the stop block 2 mounted on the net body 1; the net body 1 is woven by a thread rope, the thread rope can be made of metal wires such as iron wires and the like, can also be made of nonmetal materials such as nylon and the like, or is formed by weaving metal wires and nonmetal wires in a mixed mode, the thread rope can be selected according to specific construction conditions and cost budget, and the whole net body is of a soft structure, namely can be bent into a coil, so that the net body can be stored and transported in a coil shape.

When laying this string net, will become rolled dictyosome transport to domatic top, roll down the roll dictyosome from domatic top, if domatic when comparatively leveling, can put it freely and roll down, if domatic not enough levels, when having great rubble or sunken, can adjust the direction of rolling through auxiliary equipment such as rope and stock, so that every roll of dictyosome can both roll down to the slope end smoothly, thereby accomplished and laid a dictyosome at domatic operation, the mode of putting the dictyosome under the dress of lap like this can enough improve the efficiency of construction, can also reduce the destruction of the process of laying to the dictyosome, the transportation degree of difficulty of the dictyosome has also greatly been reduced.

After the stop block 2 is mounted on the net body 1, if the net body is wound into a roll shape, the situations of scratching, winding and the like inevitably exist between the stop block and the stop block or between the stop block and the net body, so the hanging net can not roll off and spread from a high place in the roll shape, and the hanging net can only be transported and spread in other modes, thereby greatly increasing the construction difficulty. Therefore, in the application, the net body is firstly paved on the surface of the mine to be repaired, the paving process can roll from the top of the slope to the bottom of the slope in a roll-shaped mode, and the paving process is simple and convenient and has high efficiency. After the net body 1 is paved, the stop block 2 is hung on the net body 1, so that the problem that the net body is difficult to pave after carrying the stop block is solved.

Preferably, after the rolling and laying work of the net body 1 is completed, the top of the net body 1 needs to be firmly fixed on the mine slope by means of pins and the like, so that the net body 1 cannot slide downwards along with the removed soil.

Preferably, the shape of the grid on the net body 1 can be various, such as rectangular, diamond, triangular and the like, and the shape of the grid on the net body 1 is preferably set to be diamond in this application, as shown in fig. 1, the diamond-shaped mesh can improve the mounting efficiency between the grid and the stopper, i.e. the stopper 2 can be more easily mounted on the net body 1.

In a preferred embodiment, as shown in fig. 2, 3 and 4, the block 2 is composed of at least three necessary plate materials, respectively, a soil guard plate 21, a flooring 22 and a mounting plate 23. Preferably, the retaining plate 21, the flooring plate 22 and the mounting plate 23 are connected in sequence, so that the overall cross section of the block is triangular.

The retaining plate 21 is a baffle plate which is hung on the net body 1 and forms a preset angle with the mine surface, namely the slope where the net is hung, and the preset angle is an angle close to 90 degrees, such as 75-105 degrees; the soil retaining plate 21 directly contacts with the foreign soil subsequently sprayed on the hanging net, so that the foreign soil is supported and supported, and the foreign soil is prevented from sliding downwards along the slope.

Preferably, a plurality of soil retaining grooves 211 are formed on the soil retaining plate 21 at a side supporting the foreign soil, so that a friction force between the soil retaining plate 21 and the foreign soil is increased, and stability of the foreign soil is further improved.

The floor 22 is a plate which is hung on the net body 1, is basically parallel to the surface of the mine and is directly adhered to the net body 1 for fixing. The bottom surface of the floor attaching plate 22 is attached to the net body 1, the bottom surface is further provided with a hanging piece 221 and a bayonet 222, the hanging piece 221 is strip-shaped or rod-shaped and is made of metal materials with certain elasticity and plasticity, such as iron sheets and the like. Preferably, the thickness of the hanging piece 221 is 2-3mm, so that the subsequent pressure applied on the hanging piece 221 can cause the hanging piece 221 to deform, thereby enabling the hanging piece 221 to be fastened on the string; the width of the hanging piece is small and is controlled to be less than 20mm, so that the hanging piece can easily penetrate through meshes.

The root of the hanging piece 221 is fixedly connected with the floor 22, and the fixedly connecting mode can be welding; when the stop block 2 is not hung on the net body 1, the hanging piece 221 is integrally bent, a certain gap is reserved between the top end of the hanging piece 221 and the floor 22, the gap can allow a rope on the net body 1 to pass through, so that when the top end of the hanging piece 221 slides on the net body 1, the top end can extend into the lower part of the rope, the hanging piece 221 is hung on the net body 1, and the stop block 2 is hung on the net body 1.

After the top end can extend into the lower part of the rope, the laminate flooring 22 continues to slide along with the stop blocks, the hanging pieces 221 and the rope continue to move relatively until the rope is in contact with the root parts of the hanging pieces 221, the rope and the hanging net are fixed, the hanging pieces 221 deform under the action of the stop blocks, the gap between the top ends of the hanging pieces 221 and the laminate flooring 22 is reduced until the hanging pieces 221 basically cling to the slope surface or the net body 1, and the stop blocks stop moving under the action of the rope, namely the hanging operation of the stop blocks is completed.

Preferably, at least two hanging pieces 221 are symmetrically arranged at two ends of the floor 22, so that the floor 22 and the net body 1 are stressed uniformly; further, as shown in fig. 2, 3 and 4, the hanging pieces 221 are provided in 4 numbers, that is, two rows, and the heights of the top ends of the two rows of hanging pieces 221 are different, so that when the distance between the stopper and the net body 1 is uncertain, the possibility that the rope is hung by the hanging pieces can be increased by the two rows of hanging pieces 221, and the hanging efficiency of the stopper can be increased. The top height refers to the distance between the top of the hanging piece 221 and the net body or the slope. Because the in-process of hanging the dog on the dictyosome, lacing film 221 may warp because of touching the stone, can not stretch into the cotton rope below according to the prediction, through setting up two rows of lacing films, can further improve the efficiency that the dog was hung to put through the lacing film mount cotton rope above when one row of lacing film became invalid next.

Preferably, the hanging piece 221 is disposed at the front end of the subfloor 22, i.e. at the side adjacent to the retaining plate, and the bayonet 222 is disposed at the other end of the subfloor 22, i.e. at the side adjacent to the mounting plate; the bayonet 222 is made of a metal material and has a sharp tip, and can be inserted into a stone gap under the action of external force, so that firmness between the stopper and a slope body is improved, and the stability of the stopper is improved.

Preferably, through holes can be optionally formed in the laminate floor 22, so that the quality of the block can be reduced, materials can be saved, the coverage area of the block on the ground surface can be reduced, and more space is provided for plant growth.

The mounting plate 23 is used for being connected with a mechanism for mounting the stopper, the stopper is moved by grabbing the mounting plate 23, the stopper is placed at a proper position, and the stopper is moved, so that the hanging piece 221 extends into the lower part of the thread rope and is finally hung on the net body 1.

Preferably, in the process of hanging the stop block, the mounting plate 23 is grabbed, the top end of the stop block is controlled to move towards the net body 1 and the surface direction of the slope body, namely downwards moving, and when the top end is close to or propped against the net body 1 to a certain extent, the downwards moving is stopped; during the downward movement and after stopping the downward movement, the stopper is moved from a high position to a low position along the slope direction of the slope body and the net body 1, i.e. moved forward.

The top end of the block is the edge generated by the contact of the soil retaining plate 21 and the floor 22; during the downward movement, the height of the edge is basically consistent with the height of the top end of the hanging piece 21, namely the distance between the edge and the net body 1.

Preferably, as the block moves forward, if the hanging piece 21 passes through the lower part of the rope, the root part of the hanging piece 21 will finally contact with the rope, at this time, the rope and the net body provide tension to limit the hanging piece 21 to move forward continuously, the mounting plate 23 and the mechanism for grabbing the mounting plate 23 slide relatively, under the action of the grabbing mechanism and the self gravity of the block, the block inclines towards the lower part of the slope body, namely, rotates for a certain angle around the top end, so that the floor 22 gradually adheres to the net body 1 and the slope body, the hanging piece 21 is pressed to deform, and the block is locked on the net body 1, namely, the block is changed from the state in fig. 3 to the state in fig. 4; while pressing the bayonet 222 to progressively insert it up the slope of the mine surface into the soil or rock seams. When the hanging piece 21 is deformed and the floor 22 is completely attached to the net body 1, the mounting plate 23 and the mechanism for grabbing the mounting plate 23 are separated from each other, and the stop block 2 is hung on the net body 1.

Preferably, the mechanism for gripping the mounting plate 23 comprises a magnet, the mounting plate 23 comprises an iron sheet, and the mounting plate 23 is gripped by the attraction of the magnet; more preferably, the mounting plate 23 includes two parallel iron sheets, and a large gap is left between the two iron sheets, so that not only can the material be saved, the production cost be reduced, and the space utilization rate when the stopper is stored be improved, but also the relative sliding between the magnet and the mounting plate 23 can be facilitated, thereby realizing the hanging operation of the stopper 2.

In a preferred embodiment, as shown in fig. 5, the stopper 2 is mounted on the net body 1 by a mounting device 3; the mounting device 3 comprises a stopper pushing system 4, a stopper storage system 5 and a compression roller system 6, the stopper pushing system 4 and the stopper storage system 5 are both installed in a frame of the mounting device 3, as shown in fig. 6 and 7, a travelling mechanism is arranged below the frame and comprises a roller 31, and the compression roller system 6 is hung behind the frame and moves together with the frame.

Preferably, the four rollers 31 are distributed around the frame, the mounting device 3 is lowered from the top of the mine covered with the net body 1, the mounting device 3 can move to the bottom of the mine by itself under the action of gravity, one stop block is lowered at preset intervals along the way, and the stop block is hung on the net body 1. Preferably, a rope is connected behind the mounting device 3, and the operator controls the downward speed of the mounting device by pulling the rope.

In a preferred embodiment, the block pushing system 4 is used to lower one block 2 after each set distance of movement of the mounting device 3 and to mount the block 2 on the net body 1.

Preferably, the stopper pushing system 4 comprises a power mechanism and a transmission mechanism, wherein the power mechanism is used for providing power for the transmission mechanism to drive the transmission mechanism to move according to a preset track; one end of the transmission mechanism is connected with the power mechanism, and the other end of the transmission mechanism can grab and release the check block 2, so that the check block is grabbed under the driving of the power mechanism, and the check block is placed at a preset position, so that the mounting operation of the check block is executed.

Preferably, the transmission mechanism is as shown in fig. 8, 9 and 10, and the transmission mechanism comprises a straight rod 41, and the straight rod 41 is an elongated dowel bar with sufficient strength; a connecting shaft 42 capable of being inserted into a power mechanism is arranged at the top end of the straight rod 41, the connecting shaft 42 is perpendicular to the straight rod 41, the section of the connecting shaft 42 is cylindrical, and the connecting shaft 42 can reciprocate along the length direction of the straight rod 41 under the action of the power mechanism, so that the straight rod 41 is driven to reciprocate together; preferably, a sleeve capable of rotating relatively is sleeved outside the connecting shaft 42, so as to improve the service life of the connecting shaft 42.

Preferably, the transmission mechanism is further provided with a limit baffle 71, a through hole is formed in the limit baffle 71, the cross-sectional shape of the through hole is substantially consistent with that of the straight rod 41, and the cross-sectional size of the through hole is slightly larger than that of the straight rod 41, so that the straight rod 41 can just pass through the through hole, and after passing through the through hole, the straight rod 41 can basically reciprocate only along the length direction of the straight rod, but cannot move and swing towards other directions, so that the straight rod 41 is accurately limited by the limit baffle 71 and the through hole.

The bottom of the straight rod 42 is provided with a connecting plate 43, the straight rod 42 is vertically fixed at the middle position of the connecting plate 43, two ends of the connecting plate 43 are provided with magnetic blocks 44, the magnetic blocks 44 can adsorb the mounting plate 23 on the stopper, so that when the stopper needs to be grabbed, the stopper is moved to the lower part of the connecting plate 43 and the magnetic blocks 44, the magnetic block adsorbs the grabbed stopper, the stopper 2 is further driven to move, and finally the stopper 2 is hung on the net body 1. The magnetic block can be a permanent magnet or an electromagnet, preferably, in the process that a new stop block is pushed to the position below the magnetic block by controlling the feeding time of the stop block storage system, the magnetic block moves upwards for a sufficient distance, the magnetic force of the magnetic block cannot bring negative influence to the pushing work of the stop block, and therefore the permanent magnet can be selected as the magnetic block.

Preferably, since the stopper has a certain length, in order to ensure stable and reliable grasping of the stopper, the transmission mechanism includes at least two straight rods 41 arranged parallel to each other, and when the two straight rods 41 are arranged, the two straight rods 41 are symmetrically arranged.

Preferably, as shown in fig. 9, 10 and 11, the power mechanism includes a cam 46, the cam 46 is fixedly mounted on a transmission shaft 47, the transmission shaft 47 drives the cam 46 to rotate, an annular groove 48 is formed on one surface of the cam, the connecting shaft 42 is inserted into the annular groove 48, the width of the annular groove 48 is substantially equal to or slightly greater than the outer diameter of the connecting shaft 42, and the connecting shaft 42 continuously slides in the annular groove 48 during the rotation of the cam around the transmission shaft 47 around 26, so as to drive the straight rod 41 to reciprocate along the length direction of the straight rod 41.

Preferably, the movement rule and the movement distance of the straight rod 41 are controlled by setting the distance between the edge of the cam and the rotation center, namely the distance between each position of the annular groove and the rotation center, so that the magnetic block is controlled to carry the stopper, the stopper is hung on the net body 1, the magnetic block is controlled to move, a new stopper reserving operation space is provided for the stopper storage system 5, the new stopper is grabbed by the magnetic block, an operation space is reserved for the stopper storage system 5 to return to the initial position, and finally the stopper is hung on the net body 1, so that the stopper hanging circulation operation is completed. More preferably, each time the cam rotates once, the transmission mechanism is controlled to perform one round of the above operation, and then one stop block is placed.

Preferably, the transmission shaft 47 can be driven by a motor or an internal combustion engine to rotate, and then the rotating speed of the motor or the internal combustion engine is adjusted according to the preset traveling speed of the mounting device, so that the stop pushing system 4 can be used for hanging one stop 2 every time the mounting device travels a preset distance.

The transmission shaft can be connected with a shaft on the roller 31 through a gear, a transmission rod and other mechanisms, a rotating speed ratio between the roller 31 and the transmission shaft 47 is configured according to the distance between two adjacent blocks on a preset net body and the outer diameter size of the roller, so that the blocks can be arranged according to a preset distance no matter whether the traveling speed of the hanging device is changed, the driving mode of the transmission shaft 47 is set, the traveling speed of the hanging device can be adjusted in real time according to the specific condition of the surface of a mine in the actual working process, and the actual working effect is better.

Preferably, a detection switch 72 is further disposed on the mounting device 3, and is used for detecting whether the connecting plate 43 passes through a predetermined height position in real time, so as to determine whether to provide a control instruction to the stopper storage system 5, where the control instruction includes a feeding instruction and a return initial position instruction; when the detection switch 7 detects that the connecting plate 43 moves from bottom to top and passes through the set height position, it can be known that enough space is left below the connecting plate 43, and the dog storage system 5 can be allowed to perform feeding or return to the initial position, so as to send a control instruction to the dog storage system 5, wherein when the control instruction is a feeding instruction, one dog 2 is conveyed to the position below the connecting plate 43 by the dog storage system 5, so that the magnetic block on the connecting plate 43 can perform grabbing operation on the dog; when the control instruction is a return to initial position instruction, the stopper storage system 5 returns to the initial position, so that the stopper storage system 5 is prevented from interfering with subsequent hanging operation of the stopper pushing system 4.

Preferably, the detection switch 72 may be an infrared sensor, that is, includes a plurality of sets of infrared emitting devices and a plurality of sets of infrared receiving devices, the infrared emitting devices emit infrared rays in a direction perpendicular to the moving direction of the connecting plate 43, the infrared receiving devices receive reflected infrared signals, and it can be determined whether the connecting plate 43 is located in a position area where the infrared rays pass through, and then the infrared receiving devices at different positions find the sequence of the connecting plate 43, so as to know the moving direction of the connecting plate 43, and determine whether to give a feeding instruction or return to an initial position instruction by combining with the history record of the instruction sent by the detection switch 72.

Preferably, as shown in fig. 11, the profile of the cam 46 comprises a circular arc segment and a plurality of gradual changes, the circle center of the circular arc segment is on the rotation center of the cam and the transmission shaft, and when the connecting shaft 42 passes through the circular arc segment, the straight rod 41 and the connecting plate 43 thereon are kept still; when the connecting shaft 42 passes through the transition, the straight rod 41 and the connecting plate 43 thereon move upward or downward.

Further, the side of the cam with the annular groove is set as a front side, and the cam rotates counterclockwise, as shown in fig. 11, the profile of the cam 46 sequentially includes a first arc section 461, a first upper gradual change section 462, a second arc section 463, a second upper gradual change section 464, a first lower gradual change section 465, a third upper gradual change section 466, a second lower gradual change section 467, a third arc section 468, and a third lower gradual change section 469; when the connecting shaft 42 passes through the upper transition section, the straight rod 41 and the connecting plate 43 thereon move upwards, and when the connecting shaft 42 passes through the lower transition section, the straight rod 41 and the connecting plate 43 thereon move downwards.

Specifically, when the connecting shaft 42 passes through the first arc 461, the connecting plate 43 is at the lowest position, as shown in fig. 9, the mounting device extends the top end of the stopper 2 and the hanging piece 221 into the hanging net 1, and as the connecting shaft 42 continuously slides in the first arc 461, the distance between the connecting plate 43 and the hanging net 1 and the mine slope surface is kept unchanged, and only as the mounting device 3 moves towards the lower part of the slope surface, the hanging piece 221 can pass through the lower part of the rope, and the stopper is hung on the net body 1. Preferably, the length of the first circular arc 461 is long enough to allow the distance of movement of the top end and the hanging piece 221 along the slope to be at least 3 mesh lengths or more, i.e. the top end and the hanging piece 221 pass at least three cords, and each hanging piece 221 has at least three chances to pass under the cords.

When the connecting shaft 42 slides out of the first circular arc section 461 and enters the first upper transition section 462, the connecting plate 43 starts to move upwards along the length direction of the straight rod 41.

When the connecting shaft 42 passes through the second arc 463, the mounting device enters an unloading adjustment state, the position of the connecting plate 43 is unchanged, the judgment system judges whether the stop block carried on the connecting plate 43 is still, if the stop block is determined to be not, the subsequent operation can be normally promoted, if the stop block is determined to be still, the feeding operation of the stop block storage system 5 is skipped, and the judgment is performed again when the connecting shaft 42 passes through the second arc 463 next time. Preferably, the judging system may include a device substantially corresponding to the detection switch, that is, the presence or absence of the object and the shape of the object under the connecting plate 43 are detected by infrared rays.

When the connecting shaft 42 passes through the second upper transition 464, the connecting plate 43 continuously moves upwards along the length direction of the straight rod 41, and during the moving process, the connecting plate 43 passes through the set height position, that is, the position where the detection switch 71 can give a control instruction, and preferably, when the connecting plate 43 is at the set height position, the connecting shaft 42 is located near the junction position of the second upper transition 464 and the first lower transition 465.

When the connecting shaft 42 passes through the first lower gradually-changing section 465, the connecting plate 43 continuously moves downwards along the length direction of the straight rod 41, so that the connecting plate 43 gradually approaches the stop 2 newly provided by the stop storage system 5, and when the connecting shaft 42 reaches the joint position of the first lower gradually-changing section 465 and the third upper gradually-changing section 466, the magnetic block 44 on the connecting plate 43 completes the adsorption and grabbing operation on the stop 2.

When the connecting shaft 42 passes through the third upper transition section 466, the connecting plate 43 moves upwards along the length direction of the straight rod 41, so that the stoppers 2 carried on the connecting plate 43 and the stopper storage system 5 are separated from each other, and a working space is reserved for returning the stopper storage system 5 to the initial position. When the connecting shaft 42 reaches the junction position of the third upper transition 466 and the second lower transition 467, the stop storage system 5 starts or is returning to the initial position.

When the connecting shaft 42 passes through the second lower gradually-changing section 467, the connecting plate 43 moves downward along the length direction of the straight rod 41.

When the connecting shaft 42 passes through the third arc 468, the mounting device enters a mounting adjustment state, the position of the connecting plate 43 is unchanged, and the judgment system judges and confirms whether the connecting plate 43 carries a stopper or not, and the subsequent operation is normally promoted no matter what the judgment result is, namely, whether the connecting plate carries or does not carry the stopper, but the storage record is carried out according to the condition that the stopper is not carried.

When the connecting shaft 42 passes through the third lower transition 469, the connecting plate 43 continuously moves downward along the length direction of the straight rod 41 until the connecting plate 43 reaches the lowest position, that is, the connecting shaft 42 enters the first circular arc section 461 again.

In a preferred embodiment, the dog storage system 5 stores a plurality of dogs, and after the dog pusher system 4 completes the operation of placing one dog 2, a new dog 2 can be conveyed to the dog pusher system 4.

Preferably, as shown in fig. 12, 13, 14, 15 and 18, the stopper storage system 5 includes a mounting platform 51 and a storage box 52, two sets of stopper holders 511 are disposed on the mounting platform 51, and the two sets of stopper holders 511 jointly support the stoppers 2 and can drive the stoppers 2 to reciprocate. Preferably, a limiting mechanism is further disposed on the mounting platform 51 to prevent the stopper 2 from moving on the fixing frame 511.

The bottom of the mounting platform 51 is provided with a sliding block 512, the sliding block 512 is embedded into the sliding groove 73 matched with the sliding block, and the stability of the reciprocating sliding of the mounting platform 51 is ensured through the matching between the sliding block 512 and the sliding groove 73.

The mounting platform 51 can drive the stop block fixing frame 511 and the stop block 2 on the mounting platform to move to the lower part of the transmission mechanism when receiving a feeding instruction, so that the stop block 2 is grabbed by the transmission mechanism; and when receiving the command of returning to the initial position, the mounting platform 51 can drive the stopper fixing frame 511 thereon to return to the initial position, and is separated from the transmission mechanism.

Further preferably, a rack is further disposed at the bottom of the mounting platform 51, the reciprocating sliding of the mounting platform 51 is controlled by a gear matched with the rack, the rotational power of the gear can be provided by a motor, and the motor can be locked when the motor stops rotating, and can also be switched between forward rotation and reverse rotation, so that the mounting platform 51 stably stays on the mounting device 3 when no control instruction is received, and when different control instructions are received, a corresponding execution mode can be selected through forward rotation and reverse rotation.

In a preferred embodiment, the storage box 52 is disposed directly above the installation platform 51, and preferably, the storage box 52 is located directly above the installation platform 51 when the installation platform 51 is in the initial position. The storage box 52 comprises a box body 521, a plurality of blocks 2 are stacked and carried in the box body 521 along the length direction of the box body, the plurality of blocks 2 are abutted with each other, and preferably, between two adjacent blocks, the edge of the block at the upper part penetrates through the mounting plate 23 of the block at the lower part and enters into the inner part of the block at the lower part, so that the space is saved on the whole, and more blocks can be stored in the storage box 52. Preferably, a pressing plate with a spring is provided inside the case 521 to press the stoppers downward from above so that the respective stoppers are in close contact with each other.

Preferably, the storage box 52 is capable of reciprocating along the longitudinal direction of the box body, a rack and a stopper groove may be provided outside the box body, the reciprocating movement of the storage box 52 is controlled by driving the rack with a gear, and stoppers inside the storage box 52 are mounted one by one on the stopper fixing frame 511 by the reciprocating movement of the storage box 52.

Preferably, as shown in fig. 14 and 15, a turn-over damper 522 is provided at the bottom of the case 521, i.e., at an end close to the mounting platform 51, the turn-over damper 522 is rotatable about a fixed shaft, and a stopper is provided near the turn-over damper 522 to limit a rotation angle of the turn-over damper 522, and preferably, the stopper is provided to allow the turn-over damper 522 to be reciprocally rotated only within a range of 90 to 100 degrees. The limiting block is fixedly connected with the box body 521. The flip flap 522 can be flipped towards the inside of the box 521 and finally stays in a direction substantially perpendicular to the side wall of the flip flap, which is called a holding state, i.e. the state in fig. 15; the roll-over flapper 522 is also capable of rotating in a direction substantially parallel to the side wall in which it is positioned, referred to as the retracted state, which is the state of FIG. 14.

The turning flap 522 is provided with a torsion spring, so that when the turning flap 522 is not acted by an external force, the turning flap 522 can automatically rotate to the inner side of the box 521 and is substantially perpendicular to the side wall where the turning flap is located, that is, in a supporting state, in this state, when the turning flap 522 moves along the height direction of the storage box 52 towards the direction away from the mounting platform 51, the stop 2 can be dragged from the lower direction, so that the stop above the turning flap can be driven to move upwards together, and the stop below the turning flap 522 is retained on the stop retaining frame 511. The torsion spring is sleeved on the fixed shaft, one end of the torsion spring is fixedly connected with the turning baffle 522, the other end of the torsion spring is fixedly connected with the fixed shaft or the limiting block, and the elastic force of the torsion spring pushes the turning baffle 522 to be in a bearing state.

Preferably, when the box 521 is moved toward the mounting platform 51, referred to as downward movement, the roll-over flapper 522 holds a stop in the box 521; when the box 521 moves down to the lowest position, the lowest stopper is just placed on the stopper fixing frame 511, the turnover baffle 522 is automatically controlled to turn over at the moment, the avoiding state is entered, the turnover baffle 522 moves upwards along with the box 521 until the height position of the turnover baffle 522 is higher than the lowest stopper, the turnover baffle 522 returns to the supporting state and supports the stopper above the turnover baffle 522 to move upwards together, the stopper below the turnover baffle 522 is kept at the moment and is separated from the stopper above the turnover baffle 522, and the turnover baffle 522 finally stays on the stopper fixing frame 511 and is fed to the lower part of the stopper pushing system along with the mounting platform 51.

In a preferred embodiment, as shown in fig. 14, 15, 16 and 17, an avoidance driving member 523 and a locking mechanism 524 are further mounted on the box 521, wherein the avoidance driving member 523 is used for controlling the turning flap 522 to be switched from the supporting state to the avoiding state when the box 521 moves to the bottommost end, and the locking mechanism 524 is used for controlling the avoidance driving member 523, so that the avoidance driving member 523 releases the control on the turning flap 522 to automatically return to the supporting state when necessary.

Preferably, as shown in fig. 16, the bypass driving member 523 includes a push plate 5231, a pressure bearing plate 5232 and a tail rod 5233 fixedly connected to each other as a whole; the avoidance driving member 523 can reciprocate on the box 521 within a certain distance along the length direction of the box 521, so that the push plate 5231 can push the flip barrier 522 from below, the flip barrier 522 is changed from the support state to the avoidance state, and the return to the support state is continuously prevented.

Preferably, a spring 5234 is disposed between the pressure bearing plate 5232 and the box 521, and is a spring in a compressed state, which can continuously push the pressure bearing plate 5232 and the push plate 5231 and the tail rod 5233 connected thereto to move downwards, thereby urging the push plate 5231 out of contact with the roll-over fence 522.

Preferably, the bottom end of the tail 5233 extends out of the bottom of the box 521, and when the box 521 is not moved to the lowest position during the downward movement of the box 521, the bottom of the tail 5233 can abut against the mounting platform 51, so as to push the tail 5233 to move upward relative to the box 521 against the elastic force of the first spring 5234 until the flip-flop 522 is changed from the supporting state to the avoiding state.

Preferably, the tail lever 5233 is provided with a notch 5235, and the notch 5235 is engaged with the locking mechanism 524 to lock the tail lever 5233 when the tail lever 5233 is moved upward to the limit state with respect to the case 521, and to temporarily stop the upward and downward movement thereof, thereby holding the tumble gate 522 in the retracted state.

Preferably, as shown in fig. 17, the locking mechanism 524 includes a base 5241 fixedly mounted on the box 521, a plug 5242 capable of sliding back and forth is arranged on the base 5241, a second spring 5243 connected with the plug 5242 is further arranged on the base 5241, and the front end of the plug 5242 is extended outwards from the base 5241 under the action of the second spring 5243 and can be inserted into the notch 5235 when the tail 5233 moves upwards to the limit state, as shown in fig. 14. When the tail 5233 is not moved upward to the limit, the latch 5242 abuts the tail 5233 as shown in fig. 15.

Preferably, the locking mechanism 524 further comprises a swinging member 5244 arranged on the box 521, the swinging member comprises a hinged end and a poking end, the hinged end is rotatably hinged on the hinged shaft of the box 521, the poking end extends into the box 521 and can be contacted with the stop 2 inside the box 521, so that the swinging member 5244 can swing around the hinged shaft under the action of the stop 2; a pull rope 5245 is arranged on the swinging piece 5244, one end of the pull rope 5245 is fixedly connected to the hinged end of the swinging piece, the other end of the pull rope 5245 penetrates through a through hole in the tail part of the base 5241 and is connected with a bolt 5242, and when the swinging piece 5244 swings downwards in the box 521, the pull rope 5245 can be tensioned; if the latch 5242 is located in the notch 5235, the latch 5242 can be pulled back against the action of the second spring 5243 to pull the latch 5242 out of the notch 5235, thereby eliminating the interaction between the locking mechanism 524 and the bypass driver 523, moving the bypass driver 523 under the action of the first spring 5234, disengaging the push plate 5231 from the roll-over flapper 522, and finally returning the roll-over flapper 522 to the resting state.

Preferably, a torsion spring is provided at the hinged end of the swinging member 5244, so that the swinging member 5244 is in an upward tilting state when no stopper thrust force acts, i.e., the swinging member 5244 is swung each time a stopper is touched, and the swinging member 5244 can be automatically restored to the original state. The torsion spring is sleeved on a hinge shaft of the box body 521, one end part of the torsion spring is fixedly connected with the hinge shaft, and the other end part of the torsion spring is fixedly connected with the swinging piece 5244; when the swinging member 5244 is in an upward tilt state, the torsional force on the torsion spring is just balanced with the gravity of the swinging member 5244 itself; that is, when the tap end is not in contact with the stopper, the swinging member 5244 is in an upward inclined state by the torsion spring. When the toggle end contacts the stop, the force of the stop is greater than the torsional force of the spring and the stop pushes the oscillating member 5244 to rotate until the stop disengages from the toggle end.

In a preferred embodiment, the press roller system 6 is used for pressing the block 2 after the block 2 is hung on the net body 1, so as to increase the hanging firmness of the block 2; specifically, the compression roller system has the following functions: firstly, the stop block is prompted to be placed in a posture, namely, the floor 22 of the stop block is made to be attached to the net body 1 and the mine slope surface; in addition, the hanging piece 221 is promoted to deform, and the hanging piece is tightly wrapped on the thread rope of the net body 1; thirdly, the bayonet 222 can be fully inserted into the soil and rock seams of the mine slope.

Preferably, the press roller system 6 comprises a plurality of press roller units, each of which can be optionally installed on the mounting device 3 according to actual needs; a hanging port 74 is provided at the tail of the hanging device 3 to facilitate the disassembly and assembly of the press roll unit.

Preferably, the press roller unit includes an upper pin 61 and a connecting rod 62, and both ends of the connecting rod 62 are respectively fixedly connected with the upper pin 61 and the lower pin; the top end of the connecting rod 62 is fixedly arranged in the middle of the upper pin shaft 61, and the bottom end of the connecting rod 62 is fixedly arranged in the middle of the lower pin shaft. Pinch rollers 63 are respectively arranged at two ends of the lower pin shaft, each pinch roller 63 and the lower pin shaft 61 can rotate relatively, the connecting rod 62 can pull the pinch rollers 63 to move through the lower pin shaft, and the pinch rollers 63 rotate around the lower pin shaft due to friction in the moving process.

The hitch port 74 includes a plurality of slots that receive the upper pin 61 and allow the upper pin 61 to rotate therein so that when the puck encounters an obstacle such as a rock or a block, it can roll over the obstacle.

The present invention has been described above in connection with preferred embodiments, which are merely exemplary and illustrative. On the basis of the above, the invention can be subjected to various substitutions and modifications, and the substitutions and the modifications are all within the protection scope of the invention.

Claims (10)

1. A stop block mounting device of a hanging net for mine restoration is characterized in that,

the net comprises a net body (1) and a stop block (2) hung on the net body (1);

after the net body (1) is paved on the surface of a mine to be repaired, the stop block (2) is hung on the net body (1) through the hanging device (3);

the mounting device (3) comprises a stop block pushing system (4), a stop block storage system (5) and a pressing roller system (6);

the stopper storage system (5) is stacked and loaded with a plurality of stoppers (2) abutted to each other, and the stoppers (2) can be conveyed into the stopper pushing system (4) one by one.

2. A stopper mounting device for a hanging net for mine repair according to claim 1,

the stop block pushing system (4) and the stop block storage system (5) are both installed in a frame of the mounting device (3), and a travelling mechanism is arranged below the frame.

3. The block mounting device for a hanging net for mine restoration according to claim 1,

when the mounting device (3) moves for a set distance, a stop block (2) is lowered through the stop block pushing system (4), and the stop block (2) is mounted on the net body (1).

4. A stopper mounting device for a hanging net for mine repair according to claim 1,

the block storage system (5) comprises a mounting platform (51) and a storage box (52),

two groups of block fixing frames (511) are arranged on the mounting platform (51), and the two groups of block fixing frames (511) jointly support the block (2) and can drive the block (2) to move in a reciprocating manner.

5. The block mounting device for a hanging net for mine restoration according to claim 1,

the storage box (52) is arranged right above the mounting platform (51),

preferably, the storage box (52) comprises a box body (521);

preferably, in the box body (521), between two adjacent blocks, the edge of the block positioned above penetrates through the mounting plate of the block positioned below.

6. A stopper mounting device for a hanging net for mine repair according to claim 5,

the bottom of the box body (521) is provided with a turnover baffle (522), and the turnover baffle (522) can rotate in a reciprocating mode within the range of 90-100 degrees.

7. The block mounting device for a hanging net for mine restoration according to claim 6,

an avoidance driving piece (523) and a locking mechanism (524) are further mounted on the box body (521), wherein when the box body (521) moves to the bottommost end, the avoidance driving piece (523) is used for controlling the turnover baffle (522) to be switched from the bearing state to the avoidance state;

the avoidance driving piece (523) is controlled by the locking mechanism (524), so that the avoidance driving piece (523) can release the control on the turnover baffle (522), and the turnover baffle (522) automatically returns to the bearing state.

8. The block mounting device for a hanging net for mine restoration according to claim 7,

the avoidance driving piece (523) comprises a push plate (5231), a pressure bearing plate (5232) and a tail rod (5233) which are fixedly connected into a whole,

pushing the roll-over flapper (522) from below by the push plate (5231),

a first spring (5234) is arranged between the pressure bearing plate (5232) and the box body (521),

the bottom end of the tail rod (5233) extends out of the lower part of the box body (521), and a notch (5235) is formed in the tail rod (5233).

9. A stopper mounting device for a hanging net for mine repair according to claim 7,

the locking mechanism (524) comprises a base (5241) fixedly arranged on a box body (521), a plug pin (5242) capable of sliding back and forth is arranged on the base (5241), and the plug pin (5242) can be inserted into the notch (5235);

a second spring (5243) connected with a bolt (5242) is also arranged on the base (5241).

10. The block mounting device for a hanging net for mine restoration according to claim 1,

after the stop block (2) is hung on the net body (1), the stop block (2) is pressed through the compression roller system (6), and the hanging firmness of the stop block (2) is improved.

Images