CN112278909A

CN112278909A - Even unloading system of building stones

Info

Publication number: CN112278909A
Application number: CN202011232516.0A
Authority: CN
Inventors: 李庆宗; 谢志杰; 魏环永
Original assignee: Guangzhou Yinxiang Stone Co ltd
Current assignee: Guangzhou Yinxiang Stone Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-01-29
Anticipated expiration: 2040-11-06
Also published as: CN112278909B

Abstract

The application relates to a stone uniform blanking system, which comprises a rack, a blanking mechanism arranged above the rack, a conveying device arranged on the rack and positioned below the blanking mechanism, and a flow guide piece positioned above the conveying mechanism; the discharging mechanism is positioned at the feeding end of the conveying device, the flow guide assembly is abutted against the upper surface of the conveying device, a feeding hole for stone to enter is formed in one side, facing the feeding end of the conveying device, of the flow guide piece, discharging holes for discharging the stone are formed in two sides of the flow guide piece respectively, and the feeding hole is communicated with the two discharging holes; the two discharge ports are respectively provided with a diversion trench; the frame is provided with a driving piece which drives the diversion piece to reciprocate along the conveying direction of the conveying device. This application has the effect of being convenient for the even vanning of building stones.

Description

Even unloading system of building stones

Technical Field

The application relates to the technical field of stone mining equipment, in particular to an even stone blanking system.

Background

The stone is an essential important material in the building decoration industry, and in the production process of the stone, the stone mined in a quarry is crushed by a crusher to generate small stones which are directly loaded into a container of a gravel transport vehicle through a blanking device.

Among the correlation technique, after the stone is broken, gravel transport vehicle drives the below to unloader's feed opening, because gravel transport vehicle's container length is longer, the building stones that fall on the container form the stone heap easily, consequently, in order to make the building stones fill up whole container, the driver observes the building stones condition of packing into at the building stones vanning in-process, when building stones pile up high piece and reach container upper end opening, through starting gravel transport vehicle, make gravel transport vehicle move a segment distance, make the building stones fall in the spacious position of container, when the building stones were about to fill up, continue to move a segment distance, move to the rear of a vehicle department until the stone heap, thereby accomplish whole stone vanning work.

With respect to the related art in the above, the inventors consider that: in the stone boxing process, a driver is required to continuously move the sand and stone transport vehicle, the condition that stone is accumulated needs to be paid attention to all the time, when the driver dozes off or is distracted, the condition that the stone overflows due to untimely movement of the sand and stone transport vehicle is easy to occur, and therefore inconvenience is brought to stone boxing work, and an improvement space is still left.

Disclosure of Invention

In order to facilitate the stone vanning, the application provides an even unloading system of stone.

The application provides a even unloading system of building stones adopts following technical scheme:

a stone uniform blanking system comprises a rack, a blanking mechanism arranged above the rack, a conveying device arranged on the rack and positioned below the blanking mechanism, and a flow guide piece positioned above the conveying mechanism; the discharging mechanism is positioned at the feeding end of the conveying device, the flow guide assembly is abutted against the upper surface of the conveying device, a feeding hole for stone to enter is formed in one side, facing the feeding end of the conveying device, of the flow guide piece, discharging holes for discharging the stone are formed in two sides of the flow guide piece respectively, and the feeding hole is communicated with the two discharging holes; the two discharge ports are respectively provided with a diversion trench; the frame is provided with a driving piece which drives the diversion piece to reciprocate along the conveying direction of the conveying device.

By adopting the technical scheme, the blanking device is arranged above the feeding end of the conveyer, so that stone of the crusher can fall into the feeding end of the conveyer after passing through the blanking mechanism, meanwhile, the upper end of the conveying device is provided with a flow guide piece, a feed inlet of the flow guide piece faces to the feed end of the conveying device, a discharge outlet of the flow guide piece is arranged at two sides of the conveying device, so that the containers of two gravel transport vehicles can be respectively stopped below the discharge ends of the diversion trenches on the two sides of the conveying device, the direction of the vehicle head is consistent with the conveying direction of the conveying device, when the conveying device conveys the stone materials, the stone materials are blocked by the flow guide piece and enter the feeding hole of the flow guide piece, the feeding hole is communicated with the discharging holes at two sides, so that stone entering the interior of the flow guide piece is guided to two sides of the flow guide piece, and the stone falls into the container through the flow guide groove, thereby realizing the stone boxing function of the blanking system; when the regional fast full building stones that is close to locomotive department of container, the accessible driving piece orders about water conservancy diversion spare and removes one end distance toward conveyer's feed end, make the guiding gutter of water conservancy diversion spare discharge gate department follow the water conservancy diversion spare and remove to the spacious position department of container, be convenient for evenly spread whole container with building stones with this operation, thereby need not to move grit transport vechicle repeatedly, because discharge mechanism's ejection of compact speed is fixed, consequently, can order about the water conservancy diversion spare at one section fixed time driving piece of every interval and remove, thereby the reducible driver concerns the number of times of building stones vanning circumstances, only need to pay attention to the time when water conservancy diversion spare removes the rear of a vehicle, thereby alleviate driver's work burden, be favorable to reducing the probability that the building stones spilled.

Preferably, the rack comprises a base and two groups of brackets which are fixed on the upper end surface of the base and are opposite to each other; the conveying device comprises a driving roller, a driven roller, a driving motor and a conveying belt, wherein the driving roller and the driven roller are rotatably connected between the two groups of supports, the driving motor drives the driving roller to rotate, the conveying belt is sleeved between the driving roller and the driven roller, and the peripheral surface of the driving roller and the peripheral surface of the driven roller are in meshing transmission with the inner side of the conveying belt.

Through adopting above-mentioned technical scheme to order about the drive roll through driving motor and rotate, under the meshing transmission of driven voller, driven voller and conveyer belt, the conveyer belt upper surface is transported building stones toward conveyer's discharge end, is favorable to building stones to move steadily at the uniform velocity, and then is convenient for calculate the interval time that the water conservancy diversion spare removed.

Preferably, two sets of the support up end all is provided with the backplate, two sets of the backplate extends along conveyer direction of transfer, and is two sets of the backplate supports respectively in the upper surface setting of conveyer belt both sides and protrusion conveyer belt.

Through adopting above-mentioned technical scheme, the backplate has limiting displacement to the building stones on the conveyer belt, when the water conservancy diversion piece was touch to building stones data send process, there was the part to fail the building stones that in time got into the water conservancy diversion piece feed inlet can spread toward both sides, and being provided with of backplate does benefit to the probability that reduces building stones and drop from the both sides of conveyer belt.

Preferably, the blanking mechanism comprises a blanking hopper and a support frame for supporting the blanking hopper, an opening of the blanking hopper is gradually narrowed towards the conveying device, and the support frame is fixedly connected with the support.

Through adopting above-mentioned technical scheme for advance on the building stones of breaker breakage fall down the inside wall of hopper earlier, and the building stones is concentrated down the hopper middle part under the water conservancy diversion effect of the inside wall of hopper down, and the lower hopper inside wall has played the cushioning effect, is favorable to reducing the condition that conveyer is pounded bad by the building stones.

Preferably, the support is provided with the mounting panel that is located conveyer discharge end department, the driving piece including fix on the mounting panel driving motor and with driving motor output shaft coaxial coupling's lead screw, the lead screw runs through along conveyer belt extending direction screw thread the water conservancy diversion piece, water conservancy diversion piece both sides respectively the butt in one side that two protecting plates are close to each other.

Through adopting above-mentioned technical scheme for two backplate play spacing guide's effect to the water conservancy diversion piece, thereby avoid driving motor to order about the lead screw when rotating the water conservancy diversion piece also to rotate in the lump along with the lead screw, when making the lead screw pivoted, also order about the water conservancy diversion piece with lead screw threaded connection and remove towards lead screw length direction, are favorable to the steady removal of water conservancy diversion piece.

Preferably, one end of the diversion trench, which faces the diversion piece, is rotatably connected to the discharge port, and the rotation axis of the diversion trench is parallel to the conveying direction of the conveyor belt; the two brackets are respectively provided with an inclined support seat for supporting the adjacent diversion trenches, and the two groups of inclined support seats extend along the conveying direction of the conveying belt; when the outer bottom wall of the diversion trench is abutted to the inclined strut seat, the diversion trench is inclined and arranged downwards.

By adopting the technical scheme, the diversion trench swings by taking the conveying direction of the conveying belt as an axis, the head part of the gravel transport vehicle is higher, the diversion trench can prevent the gravel transport vehicle from running to the two sides of the conveying device, the diversion trench swings frequently, so that the influence of the diversion trench on the running of the gravel transport vehicle is favorably reduced, the length design of the diversion trench does not influence the stone boxing operation of the gravel transport vehicle, the lower end of the diversion trench extends to the opening at the upper end of the container as much as possible by prolonging the length of the diversion trench, the distance between the lower end of the diversion trench and the inner bottom wall of the gravel transport vehicle is reduced, the kinetic energy when stones fall to the inner bottom wall of the container is favorably reduced, and the condition that the inner bottom wall of the gravel transport vehicle container is damaged by stones is reduced; the inclined support seat plays a supporting role for the diversion trench, so that the diversion trench is kept in an inclined downward state when stones fall, and the stability of the diversion trench during discharging is improved.

Preferably, the two sides of the diversion part are respectively provided with a fixing plate, the fixing plates are fixed with a working motor, an output shaft of the working motor is coaxially connected with a rotating shaft, the axis of the rotating shaft is parallel to the conveying direction of the conveying belt, the length direction of the conveying belt is parallel, and the rotating shaft is fixedly connected with one end of the diversion groove, which faces the diversion part.

Through adopting above-mentioned technical scheme to accessible work motor drive pivot rotates, and the pivot drives the guiding gutter swing, has improved this unloading system's degree of automation, and then improves the efficiency when the grit vanning, is favorable to alleviateing staff's working strength.

Preferably, two the discharge gate is provided with the spread groove, the spread groove both ends communicate with discharge gate and guiding gutter respectively, work as when the guiding gutter swings to vertical state, the guiding gutter was kept away from the one end opening of water conservancy diversion spare to the spread groove inner bottom wall closed.

Through adopting above-mentioned technical scheme, with the spread groove with discharge gate and guiding gutter intercommunication to can swing the guiding gutter to vertical state and seal the spread groove opening, thereby reach the purpose of indirect closure water conservancy diversion spare discharge gate, be favorable to realizing the purpose that this water conservancy diversion spare unilateral was arranged.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the diversion piece is abutted against the upper surface of the conveying device, a feeding hole is formed in one side, facing the conveying device, of the diversion piece, discharge holes are formed in two sides of the diversion piece, stone is separated towards two sides of the diversion piece, and meanwhile the diversion piece is driven to move through the driving piece, so that the discharge holes are moved, the stone can be paved in a container without moving a sand transport vehicle, and the aim of facilitating stone boxing is fulfilled;

2. the diversion trench is connected with the discharge hole of the diversion piece in a rotating mode, so that stones can be conveniently guided into the container, and the situation that the diversion trench obstructs the gravel transport vehicle to reach the boxing position of the discharging system is favorably reduced.

Drawings

Fig. 1 is a schematic view of an overall structure of a uniform blanking system according to an embodiment of the present application.

Fig. 2 is a vertical sectional view of the conveyor belt in the embodiment of the present application.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Description of reference numerals: 1. a frame; 11. a base; 12. a support; 121. a support bar; 122. a strip plate; 2. a blanking mechanism; 21. a support frame; 22. feeding a hopper; 3. a conveying device; 31. an active motor; 32. a drive roll; 33. a conveyor belt; 34. a driven roller; 4. a drive member; 41. a drive motor; 42. a screw rod; 5. a flow guide member; 51. a feed inlet; 52. a discharge port; 53. a diversion trench; 54. connecting grooves; 55. a fixing plate; 56. a working motor; 57. a rotating shaft; 6. a diagonal bracing seat; 61. a diagonal brace; a sloping plate; 7. a guard plate; 8. and (7) mounting the plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses even unloading system of building stones. Referring to fig. 1 and 2, a uniform stone blanking system includes a frame 1, a blanking mechanism 2 installed above the frame 1, a conveyor 3 installed on the frame 1 and located below the blanking mechanism 2, and a deflector 5 located above the conveyor 3. The guide elements 5 are used to force the rock material out of both sides of the conveyor 3. The frame 1 is equipped with a drive 4 for driving the deflector 5 to reciprocate in the conveying direction of the conveyor 3. The diversion piece 5 is driven to move in the conveying direction of the conveying device 3 through the driving piece 4, so that stones are uniformly paved in containers of the gravel transport vehicles on the two sides of the conveying device 3, and the stone boxing work is facilitated.

Referring to fig. 1, the frame 1 includes a base 11 for parking the gravel transportation vehicle and two sets of brackets 12 fixed in the middle of the upper end surface of the base 11 and facing each other. The bracket 12 includes two vertically disposed support rods 121 and a bar plate 122 for fixing the upper ends of the two support rods 121. The support bars 121 are located at both ends of the strip plate 122 in the length direction.

Referring to fig. 2, the conveying device 3 includes a driving roller 32 and a driven roller 34 horizontally rotatably connected between two strip plates 122, the driving roller 32 and the driven roller 34 are parallel to each other and are respectively disposed at two ends of the strip plates 122 in the length direction, the two ends of the driving roller 32 are connected with the two strip plates 122 through bearings to realize a rotation function, and similarly, the two ends of the driven roller 34 are connected with the two strip plates 122 through bearings to realize a rotation function. The conveying device 3 further comprises a driving motor 31 driving the driving roller 32 to rotate and a conveying belt 33 sleeved between the driving roller 32 and the driven roller 34, the peripheral surfaces of the driving roller 32 and the driven roller 34 are meshed with the inner side of the conveying belt 33, and the output shaft of the driving motor 31 is coaxially connected with the driving roller 32. The drive roller 32 is located at the feed end of the conveyor 3 and the driven roller 34 is located at the discharge end of the conveyor 3. The drive roll 32 is driven by the drive motor 31 to rotate, and the drive roll 32 drives the movable conveyor belt 33 to rotate, so that the function of the conveyor 3 for conveying stone is realized.

Referring to fig. 1 and 2, the upper end surfaces of the two strips 122 are fixed with the guard plates 7, and the guard plates 7 extend along the length direction of the strips 122. The two guard plates 7 of the guard plate 7 are respectively abutted against two sides of the conveyor belt 33 and are arranged to protrude out of the upper surface of the conveyor belt 33. The presence of the shield 7 is advantageous in reducing the probability of rock material falling from both sides of the conveyor belt 33.

Referring to fig. 1 and 2, the blanking mechanism 2 includes a support frame 21 and a blanking hopper 22 above the driving roller 32, and the support frame 21 is fixed on the upper end surfaces of the two long slats 122. The lower end opening of the lower hopper 22 is gradually narrowed toward the conveyor belt 33. The upper end of the support frame 21 is fixed to the outer periphery of the lower hopper 22. The inner side wall of the lower hopper 22 plays a role of buffering, which is beneficial to reducing the probability of damage of the conveyor belt 33.

Referring to fig. 2 and 3, the flow guiding member 5 is in a triangular prism shape, one rectangular sidewall of the flow guiding member 5 abuts against the upper surface of the conveyor belt 33, and two triangular sidewalls of the flow guiding member 5 face to two sides of the conveyor 3 respectively. One side of the flow guide part 5 facing the lower hopper 22 is provided with a feed inlet 51, the lower side edge of the opening of the feed hopper is attached to the upper surface of the conveyor belt 33, the lower side wall of the feed inlet 51 is arranged upwards in an inclined mode, and the inclined upper end of the feed hopper is higher than the upper end surface of the protective plate 7. Two triangular side walls of the flow guide part 5 are horizontally provided with a discharge hole 52 communicated with the feed hole 51, and the lower side of the discharge hole 52 is higher than the upper end surface of the guard plate 7. The diversion function of the diversion part 5 is realized through the opening of the feed inlet 51 and the discharge outlet 52.

Referring to fig. 2 and 3, fixing plates 55 are respectively fixed to two triangular side walls of the deflector 5, working motors 56 are respectively fixed to the two fixing plates 55, and output shafts of the working motors 56 penetrate the fixing plates 55 and are rotatably connected with rotating shafts 57 parallel to the length direction of the strip plates 122. The guide grooves 53 are fixed on the outer peripheral surfaces of the two rotating shafts 57, the extending direction of the guide grooves 53 is vertical to the axial direction of the rotating shafts 57, and the rotating shafts 57 are positioned at one ends of the guide grooves 53 facing the feed port 51. The two triangular side walls of the flow guiding member 5 are both fixed with a connecting groove 54 communicated with the discharge port 52, one end of the connecting groove 54 far away from the discharge port 52 is opened and is communicated with one end of the flow guiding groove 53 facing the flow guiding member 5, and when the flow guiding groove 53 swings to be in a vertical state, the bottom wall of the flow guiding groove 53 closes one end opening of the connecting groove 54 far away from the flow guiding member 5. Through the rotation connection of the diversion trench 53 and the connection of the connection trench 54, the free switching of the single-side drainage function and the double-side drainage function of the diversion piece 5 is realized, and the stone boxing work is convenient to complete.

Referring to fig. 2 and 3, the inclined strut seats 6 are fixed on the sides of the two strip plates 122, which are away from each other, each inclined strut seat 6 includes a plurality of inclined struts 61 distributed at equal intervals along the length direction of the strip plate 122 and an inclined plate 62 fixedly connected with one end of each inclined strut 61 far away from the strip plate 122, and the inclined plate 62 extends along the length direction of the strip plate 122 and is inclined and arranged downwards toward the direction far away from the guard plate 7. When the lower end surface of the guiding groove 53 abuts against one side of the inclined plate 62 far away from the inclined stay 61, the guiding groove 53 extends downwards in an inclined manner in a direction far away from the guiding member 5. The inclined supporting seat 6 supports the diversion trench 53, and is favorable for improving the stability of the diversion trench 53 during discharging.

Referring to fig. 2 and 3, a mounting plate 8 at the discharge end of the conveyor 3 is commonly secured to the upper end surfaces of the two elongated slats 122. The driving member 4 comprises a driving motor 41 fixed on one side of the mounting plate 8 departing from the discharging hopper 22 and a screw rod 42 coaxially connected with an output shaft of the driving motor 41, the screw rod 42 is positioned above the conveyor belt 33, the screw rod 42 penetrates through the upper end of the diversion member 5 along a thread in a direction parallel to the length of the strip plate 122, and two sides of the diversion member 5 are respectively abutted to one side of the two guard plates 7 which are close to each other. One end of the screw rod 42 far away from the driving motor 41 is rotatably connected to one side of the support frame 21 facing the mounting plate 8 through a bearing. Therefore, under the driving action of the screw rod 42 and the limiting and guiding action of the two guard plates 7 on the flow guide piece 5, the flow guide piece 5 can stably move along the conveying direction of the conveying belt 33, and the purpose that the driving piece 4 drives the flow guide piece 5 to move is achieved.

The implementation principle of the even unloading system of building stones of this application embodiment does:

when stones are required to be loaded into the container of the gravel transport vehicle, the diversion piece 5 is positioned at the discharge end of the conveying device 3, and the diversion groove 53 is in a state of closing the opening at the end part of the connecting groove 54, firstly, a driver drives the gravel transport vehicle to one side of the conveying device 3, and simultaneously, the direction of the vehicle head is consistent with the conveying direction of the conveying belt 33, then the working motor 56 is started, the working motor 56 drives the rotating shaft 57 to rotate, the rotating shaft 57 drives the diversion groove 53 to swing downwards to the opening of the container, at the same time, the lower end of the diversion groove 53 faces the position close to the vehicle head of the opening of the container, then the stones crushed by the crusher are discharged to the upper surface of the conveying belt 33 through the blanking hopper 22 and are conveyed to the feed inlet 51 of the diversion piece 5 by the conveying belt 33, the stones are squeezed into the feed inlet 51 and discharged from the discharge outlet 52, and the stones sequentially, because the blanking speed of the blanking hopper 22 and the conveying speed of the conveyor belt 33 are fixed, the aim of uniformly paving the stone can be fulfilled by moving the diversion part 5 towards one end of the feeding hole 51 of the conveyor belt 33 for multiple times within an equal time interval, and the driving mode of the driving part 4 is as follows: the driving motor 41 works and drives the screw rod 42 to rotate, and the diversion piece 5 stably moves towards the direction of the lower hopper 22 under the limiting and guiding effects of the protective plate 7 and the driving of the screw rod 42.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a even unloading system of building stones which characterized in that: the automatic feeding device comprises a rack (1), a blanking mechanism (2) arranged above the rack (1), a conveying device (3) arranged on the rack (1) and positioned below the blanking mechanism (2), and a flow guide piece (5) positioned above the conveying mechanism; the blanking mechanism (2) is positioned at the feeding end of the conveying device (3), the flow guide assembly is abutted against the upper surface of the conveying device (3), one side, facing the feeding end of the conveying device (3), of the flow guide piece (5) is provided with a feeding hole (51) for stone to enter, two sides of the flow guide piece (5) are respectively provided with a discharging hole (52) for the stone to discharge, and the feeding hole (51) is communicated with the two discharging holes (52); the two discharge ports (52) are respectively provided with a flow guide groove (53); the machine frame (1) is provided with a driving piece (4) which drives the flow guide piece (5) to reciprocate along the conveying direction of the conveying device (3).

2. The stone uniform blanking system as claimed in claim 1, wherein: the rack (1) comprises a base (11) and two groups of brackets (12) which are fixed on the upper end surface of the base (11) and are opposite to each other; the conveying device (3) comprises a driving roller (32) and a driven roller (34) which are rotatably connected between two groups of brackets (12), a driving motor (31) for driving the driving roller (32) to rotate and a conveying belt (33) sleeved between the driving roller (32) and the driven roller (34), and the peripheral surfaces of the driving roller (32) and the driven roller (34) are in meshing transmission with the inner side of the conveying belt (33).

3. The stone uniform blanking system as claimed in claim 2, wherein: two sets of support (12) up end all is provided with backplate (7), two sets of backplate (7) extend along conveyer (3) direction of transfer, and are two sets of backplate (7) butt respectively in the upper surface setting of conveyer belt (33) both sides and protrusion conveyer belt (33).

4. The stone uniform blanking system as claimed in claim 1, wherein: the blanking mechanism (2) comprises a blanking hopper (22) and a support frame (21) used for supporting the blanking hopper (22), the opening of the blanking hopper (22) is gradually narrowed towards the conveying device (3), and the support frame (21) is fixedly connected with the support (12).

5. The stone uniform blanking system as claimed in claim 3, wherein: support (12) are provided with mounting panel (8) that are located conveyer (3) discharge end department, driving piece (4) including fix driving motor (41) on mounting panel (8) and with driving motor (41) output shaft coaxial coupling's lead screw (42), lead screw (42) are run through along conveyer belt (33) extending direction screw thread water conservancy diversion spare (5), water conservancy diversion spare (5) both sides butt respectively in one side that two backplate (7) are close to each other.

6. The stone uniform blanking system as claimed in claim 2, wherein: the diversion trench (53) is rotatably connected to the discharge hole (52) towards one end of the diversion part (5), and the line of a rotating shaft (57) of the diversion trench (53) is parallel to the conveying direction of the conveyor belt (33); the two supports (12) are respectively provided with an inclined support seat (6) for supporting the adjacent diversion trenches (53), and the two groups of inclined support seats (6) extend along the conveying direction of the conveying belt (33); when the outer bottom wall of the diversion trench (53) is abutted against the inclined support seat (6), the diversion trench (53) is obliquely and downwards arranged.

7. The stone uniform blanking system as claimed in claim 6, wherein: the utility model discloses a conveyor belt, including water conservancy diversion spare (5), water conservancy diversion spare (5) both sides are provided with fixed plate (55) respectively, fixed plate (55) are fixed with work motor (56), work motor (56) output shaft coaxial coupling has pivot (57), pivot (57) axis is parallel with conveyer belt (33) direction of transfer, conveyer belt (33) length direction is parallel, pivot (57) and guiding gutter (53) are towards the one end fixed connection of water conservancy diversion spare (5).

8. The stone uniform blanking system as claimed in claim 7, wherein: two discharge gate (52) are provided with connecting groove (54), connecting groove (54) both ends communicate with discharge gate (52) and guiding gutter (53) respectively, when guiding gutter (53) swing to vertical state, the one end opening that guiding piece (5) was kept away from in guiding gutter (53) bottom wall closed connecting groove (54).