JPH09256305A - Sieving vehicle of crushed stone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover only large size of crushed stones and reuse it, by sieving soil in excavated crushed stones by a vibration screen in a sieving vehicle and crushing and rejecting fragile crushed stones from the oversize crushed stones by a trommel screen. SOLUTION: A vibrating screen 6 for primary screening is equipped at either front part or rear part of a working vehicle. Excavated crushed stones are fed in a cylindrical 23 rotary screen 21. Large but fragile crushed stones are crushed by the revolution to classify crushed stones which can be reused as ballast and sand and small crushed stones are discharged from fine openings 22 of the cylindrical body 23 and rejected by the first discharge conveyor 40. Only the rest large crushed stones are raked up by raking-up members 32 protruded into the discharge opening 26 of the cylindrical body 23. Then the second discharge conveyor is driven to discharge and reuse it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushed stone sieving work vehicle used when exchanging crushed stones on a roadbed on which rails on which trains run are laid.

[0002]

2. Description of the Related Art Rails absorb shocks acting on the rails during train travel and improve drainage on the track.
It is usually laid on a roadbed made of crushed stone.

For this reason, the crushed stone is regularly replaced to maintain its function. For example, we excavate the crushed stones of the roadbed and replace the crushed stones by backfilling with new crushed stones.However, some of the crushed stones that have been dug up can be reused significantly, so the crushed stones that have been dug up can be used to make large crushed stones. And crushed it into smaller crushed stones, and backfilled the larger crushed stones for reuse.

Various types of work vehicles have been proposed as a work vehicle for sieving the above-mentioned excavated crushed stone. For example, attach a rotary sieve to the car body running on the rail,
A crushed stone sieving work vehicle has been proposed in which crushed stones dug up into this rotary type sieve are put into a crushed stone into large crushed stones.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The above-mentioned rotary sieving machine for crushed stone sieving work vehicles drops small crushed stones in the crushed stones that are thrown in by rotating a cylindrical body having a large number of small holes by a net or the like. A large crushed stone is discharged from the outlet. On the other hand, among the crushed stones dug up the roadbed, earth and sand, small crushed stones, large crushed stones, large fragile crushed stones,
A crushed lump of crushed stone is mixed.

Because of this, when the excavated crushed stones are put into a rotary sieve and sieved, the earth and sand may close the small holes and the small crushed stones may not drop smoothly from the small holes.

Further, since the crushed stone thrown in by the rotation of the tubular body rolls and an impact force acts on it, large but fragile crushed stones are crushed and crushed lumps are loosened. Since the earth and sand in the excavated crushed stone that has been put into the field has a cushioning function, the impact force acting on the crushed stone is small and large, but it is not possible to sufficiently loosen the fragile crushed stone or crushed lumps.

For this reason, large crushed stones that cannot be reused as a roadbed are discharged together with large crushed stones that can be reused as a roadbed.

Therefore, an object of the present invention is to provide a crushed stone sieving work vehicle capable of solving the above-mentioned problems.

[0010]

A first invention is a rail 3
A vibrating sieving machine 6 for the primary sieving was attached to one side in the front-rear direction of the vehicle body 1 traveling on the upper side, and a rotary sieving 21 for the secondary sieving was attached to the other side of the vehicle body 1 in the front-rear direction. Sieve the soil in the crushed stone with a vibrating sieving machine 6,
This is a crushed stone sieving work vehicle in which crushed stones other than the earth and sand are put into a rotary sieve 21 to screen small crushed stones and discharge only large crushed stones.

According to the first aspect of the present invention, the earth and sand in the excavated crushed stone is sieved by the vibrating type sieving machine 6, and the crushed stone containing no earth and sand is put into the rotary sieve 21 for sieving. Therefore, the rotary sieve 21 Can reliably screen small crushed stones without clogging with earth and sand, and can apply a large impact force to the crushed stones to reliably crush and sift large fragile crushed stones, and also reliably loosen a plurality of crushed stones. Can be used as one crushed stone, and only large crushed stone that can be reused as a roadbed can be sorted out.

The second aspect of the present invention is the earth and sand and the rotary type sieve 21 which are sieved by the vibrating type sieving machine 6 of the first aspect.
The first discharge conveyor for transporting small crushed stones and the like, which have been sifted with, and the second discharge conveyor for transporting large crushed stones discharged by the rotary sieve 21, are attached to the vehicle body 1, respectively, and the discharge side of the first discharge conveyor is attached. This is a crushed stone sieving work vehicle in which the section and the second discharge conveyor can swing in the horizontal direction.

According to the second aspect of the invention, the sorted sand, small crushed stones, etc. can be conveyed by the first discharge conveyor, and the discharge portion of the first discharge conveyor is swung to freely move the vehicle body 1 in the left-right direction. In addition, large crushed stones can be conveyed by the second discharge conveyor, and by swinging the second discharge conveyor, the crushed stones can be discharged to any place in the left-right direction of the vehicle body 1.

Because of this, large crushed stone that can be reused as a roadbed can be discharged to the side of the rail 3 or between a pair of rails 3, and earth and sand that cannot be reused as a roadbed, small crushed stones, etc. can be discharged to the side of the rail 3. It can be loaded on a truck that runs or a truck that runs on rails 3.

A third aspect of the invention comprises the rotary sieve 21 of the second aspect of the invention, which has an inlet 25 and an outlet 26, a large number of small holes 22 near the inlet 25, and an inner surface near the outlet 26. A cylindrical body 23 having a scraping member 32 and a motor 24 for rotating the cylindrical body 23 are provided, and the cylindrical member 23 protrudes into an outlet 26 of the cylindrical member 23 and is scraped up by the scraping member 32. It is a crushed stone sieving work vehicle provided with a discharge shooter 33 for guiding and guiding large crushed stones to a second discharge conveyor.

According to the third invention, only large crushed stones can be conveyed to the second discharge conveyor by the scraping member 32 and the discharge shooter 33.

A fourth aspect of the invention is a crushed stone sieving work vehicle in which a large number of small holes 22 are continuously formed from the inlet 25 to the outlet 26 of the cylindrical body 23 in the third aspect.

According to the fourth aspect of the present invention, since the crushed stones smaller than the small holes 22 fall while the crushed stones are moved from the inlet 25 to the outlet 26 of the tubular body 23, the small crushed stones are surely provided. It is not screened, lifted by the scraping member 32, and sent to the discharge shooter 33.

Therefore, only large crushed stone that can be reused as a roadbed can be reliably sieved.

A fifth aspect of the present invention is to squeeze the blade 71 on the inner surface of the cylindrical body 23 of the third or fourth aspect of the invention near the inlet 25.
It is a crushed stone sieving work vehicle equipped with.

According to the fifth aspect of the present invention, the crushed stones thrown into the tubular body 23 are swirled up and carried by the blades 71 and fall, so that a large impact force acts on the crushed stones to ensure a large but fragile crushed stone. It can be crushed, and it can surely loosen multiple crushed stones.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS.
Iron wheels 2 are attached to the front, rear, left and right of the rail 3
It is as a car body that runs along. Towing hooks 4 are attached to the front and rear of the vehicle body 1, respectively, so that the vehicle can be towed by an unillustrated track vehicle. Note that the iron wheel 2 may be driven by a drive source so as to be self-propelled.

A pedestal 5 is attached to one side of the vehicle body 1 in the front-rear direction, and a vibrating sieving machine 6 for the primary sieving is attached to the pedestal 5. In this vibrating type sieving machine 6, a hopper 7 is attached to a pedestal 5 via a cushioning material 8 such as a spring,
A vibration exciter 9 is attached to the hopper 7.

The bottom wall 7a of the hopper 7 is substantially horizontal, the rear side of the bottom wall 7a has a downward funnel shape and has a discharge port 10, and a screen 11 is provided above the discharge port 10. A discharge shooter 12 is provided continuously with the screen 11 toward the other side in the front-rear direction.

A frame 20 is attached to the other side portion of the vehicle body 1 in the front-rear direction. A rotary sieve 21 for a secondary sieve is attached to the frame 20. In this rotary type sieve 21, a tubular body 23 having a large number of small holes 22 is rotatably attached to the frame 20, and a drive motor 24 for rotating the tubular body 23 is attached to the frame 20. The cylindrical body 23 has a taper portion 23a and a perfect circle portion 23b, and a small diameter portion of the taper 23a is a charging port 25 and a perfect circle portion 23b.
Is an outlet 26. In the cylindrical body 23, the small diameter portion of the tapered portion 23a is rotatably attached to a pair of left and right vertical members 20a near the front portion of the frame 20 about a horizontal axis.
The input port 25 faces the vibrating type sieving machine 6, and the discharge shooter 12 projects into the input port 25.

Specifically, as shown in FIG. 3, the frame 2
A plate 27 is fixed to a pair of vertical members 20a and horizontal members 20b of 0, and a movable ring 29 is rotatably supported by a fixed ring 28 fixed to the plate 27.
The small diameter portion of the tubular body 23 is connected to the ring 30 fixed to the. The pinion 31 rotated by the drive motor 24 is meshed with the ring-shaped tooth portion 29 a of the movable ring 29.

A small hole 22 is formed in the tapered portion 23a of the cylindrical body 23, but no small hole is formed in the perfect circular portion 23b. A plurality of scraping members 32 are provided at intervals in the rotation direction on the inner peripheral surface of the perfect circle portion 23b. The scraping member 32 scrapes up large crushed stones in the perfect circle portion 23b and discharges the shooter. 33.

Specifically, as shown in FIGS. 4, 5 and 6, the scraping member 32 has a first vertical piece 3 which faces in a radial direction.
V-shaped protrusion 32c formed by 2a and the second vertical piece 32b
And a plate 32d that closes the front side of the protrusion 32c
It has. The protruding portion 32c is fixed to the perfect circular portion 23b of the cylindrical body 23 and the plate 23c.

The discharge shooter 33 includes a receiving portion 34 and a pair of discharging portions 35. The receiving portion 34 has a V-shaped cross section and a bottom surface 34a is inclined with respect to the horizontal. Discharge unit 3
Reference numeral 5 has a U-shaped cross section and is fixed to the receiving portion 34 in the left-right direction, and the bottom surface 35a thereof is inclined with respect to the horizontal.

The receiving portion 34 is attached to the rear transverse member 20c of the frame 20 by the bracket 36, and the pair of discharging portions 3
5 is attached to the rear cross member 20c by a bracket 37.
As a result, the receiving portion 34 projects into the true circular portion 23b from the discharge port 26 of the tubular portion 23, and the pair of discharge portions 35 form the tubular body 23.
It projects further outward and faces in the left-right direction.

Because of this, as shown in FIG. 6, by rotating the cylindrical body 23 in the direction of the arrow, the large crushed stone a in the perfect circle portion 23b is moved upward by the first vertical piece 32a of the scraping member 32. When it is conveyed and moves above the center of rotation, it falls into the receiving portion 34. Large crushed stone a dropped on the receiving part 34
Slips on the pair of discharge parts 35, and slides along the discharge parts 35 in the left-right direction.

A first discharge conveyor 40 is attached to the vehicle body 1. The first discharge conveyor 40 is provided from the lower portion of the discharge port 10 of the vibrating sieving machine 6 to the cylindrical body 2 of the rotary sieving 21.
And a horizontal part 40a continuous to the lower part of
It has an oblique portion 40b which is continuous with a and faces obliquely upward.

The first discharge conveyor 40 is formed by winding a belt 43 around rollers 42 provided on a support frame 41, and a pair of guides 44 are attached to the frame 41 as shown in FIG. A guide plate 45 composed of a pair of rubber plates is attached to the lower part of the. As a result, crushed stones smaller than the small holes 22 of the tapered portion 23a of the tubular body 23 smoothly drop onto the belt 43.

The first discharge conveyor 40 in the vehicle body 1
A second discharge conveyor 50 is attached to the lower part of the oblique portion 40b so as to be vertically swingable and horizontally swingable. The second discharge conveyor 50 is provided on the support frame 53 by attaching a pair of left and right support frames 53 to the body 52, which is attached to the vehicle body 1 by means of vertical pins 51 so that the support frames 53 can be vertically pivoted. A belt 56 is wound around the roller 55.
The support frame 53 is connected to the upper cross member 20d of the frame 20 by a chain 57.

A third discharge conveyor 60 is attached to the lower portion of the pair of discharge portions 35 of the vehicle body 1 so as to be swingable vertically and horizontally. The third discharge conveyor 60 is the vehicle body 1
A pair of left and right support frames 63 is vertically swingably attached to a mounting body 62 that is swingably attached to the left and right by a vertical pin 61, and a belt 66 is wound around a roller 65 provided on the support frame 63. It is a thing. This support frame 6
3 is connected to the upper cross member 20d of the frame 20 by a chain 67.

Next, the operation of sieving the crushed stones excavated will be described. An old roadbed is dug up with a track-type power shovel that travels along the rails 3, and the excavated roadbed is put into the hopper 7 of the vibration sieving machine 6. The crushed stones put into the hopper 7 are sent to the rear side by the vibration of the vibration exciter 9, and when passing through the screen 10, the earth and sand and extremely small crushed stones fall, and the large crushed stones are rotated by the discharge shooter 12. It is put into the cylindrical body 23 of the sieve 21.

The crushed stone put into the tubular body 23 is the tubular body 2.
The rotation of 3 crushes large crushed fragile stones even if it receives an impact force, and loosens large crushed stones. Then, the small crushed stones and the crushed crushed stone pieces fall from the small holes 22, and the large crushed stones are sent to the perfect circular portion 23b of the tubular body 23.

The earth and sand dropped from the vibrating type sieving machine 6,
The small crushed stones and the crushed crushed stones that have dropped from the small holes 22 of the tubular body 23 fall on the first discharge conveyor 40 and are discharged from the second discharge conveyor 50. This second discharge conveyor 5
Since 0 can swing in the left-right direction, the small crushed stones and the crushed crushed stones described above can be discharged to a truck that is connected to the rear portion of the vehicle body 1, a truck that runs on the side of the rail 2, or the like.

The large crushed stone sent to the perfect circular portion 23b of the cylindrical body 23 is sent upward by the scraping member 32 and is put into the receiving portion 35 of the discharge shooter 33. The large crushed stones put into the receiving portion 35 are the pair of discharging portions 3
6 to the pair of third discharge conveyors 60.

Since the third discharge conveyor 60 is swingable in the left-right direction, large crushed stones can be discharged to the side portion of the rail 22.

Further, since the second discharge conveyor 50 and the third discharge conveyor 60 can be stored in the vehicle body 1 as shown by the solid line in FIG. 2, the second discharge conveyor 50 and the third discharge conveyor 60 can be stored along the rail 3 without sieving work. Conveyor 50, third discharge conveyor 6
Zero does not interfere with obstacles near the rail.

7 and 8 show the cylindrical body 2 of the rotary sieve 21.
The second embodiment of No. 3 is shown, and the small hole 22 is formed in the perfect circle portion 23b. By doing so, even if small crushed stones or crushed crushed stones do not fall from the small holes 22 of the taper portion 23a of the tubular body 23, the small crushed stones or crushed crushed stones sent to the perfect circle portion 23b Small hole 22 of perfect circle portion 23b
It does not fall further and they are not sent to the third discharge conveyor 60 from the discharge shooter 33 together with large crushed stones.

FIG. 9 and FIG. 10 show a third embodiment of the cylindrical body 23 of the rotary sieve 21. A plurality of agitating blades 71 are provided on the inner peripheral surface of the taper portion 23a at intervals in the circumferential direction. In this way, the tapered portion 23a of the tubular body 23
Since the crushed stones thrown in are sent by the stirring blades 71 in the circumferential direction and fall, a large impact force acts on the crushed stones.

Therefore, a large but fragile crushed stone can be surely crushed, and a large crushed lump of crushed stone can be surely loosened.

[Brief description of drawings]

FIG. 1 is a front view of a crushed stone sieving work vehicle showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged sectional view taken along line AA of FIG.

FIG. 4 is a vertical cross-sectional view of a rotary sieve.

FIG. 5 is a cross-sectional view of a rotary sieve.

FIG. 6 is a side view of a rotary sieve.

FIG. 7 is a vertical sectional view showing a second embodiment of the tubular body of the rotary sieve.

FIG. 8 is a sectional view taken along the line BB of FIG. 7;

FIG. 9 is a longitudinal sectional view showing a third embodiment of the tubular body of the rotary sieve.

FIG. 10 is a sectional view taken along the line CC in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Car body 2 ... Iron wheel 3 ... Rail 6 ... Vibration type sieving machine 7 ... Hopper 10 ... Discharge port 11 ... Screen 20 ... Frame 21 ... Rotating type sieve 22 ... Small hole 23 ... Cylindrical body 23a ... Tapered part 23b ... True circle part 24 ... Drive motor 25 ... Input port 26 ... Ejection port 32 ... Scraping member 33 ... Ejection shooter 34 ... Receiving part 35 ... Ejection part 40 ... First ejection conveyor 50 ... Second ejection conveyor 60 ... Third ejection conveyor.

Claims (5)

[Claims] 1. A vibrating sieving machine 6 for primary sieving is mounted on one side of the vehicle body 1 traveling on the rail 3 in the front-rear direction, and a rotary sieving for secondary sieving is provided on the other side of the vehicle body 1 in the front-rear direction. 21 is installed, the earth and sand in the excavated crushed stone is sifted by the vibrating sieving machine 6, and the crushed stone other than the earth and sand is put into the rotary sieve 21 to sift small crushed stones and discharge only large crushed stones. A crushed stone sieving work vehicle. 2. A first discharge conveyer for conveying earth and sand screened by the vibrating screener 6 and small crushed stones screened by the rotary screen 21, and the rotary screen 21.
2. A second discharge conveyor for transporting large crushed stones discharged in step 1 is attached to the vehicle body 1, respectively, and the discharge side portion of the first discharge conveyor and the second discharge conveyor are swingable in a horizontal plane direction. Crushed stone sieving work vehicle. 3. A tubular body 23 having a charging port 25 and a discharging port 26, a large number of small holes 22 near the charging port 25, and a scraping member 32 on the inner surface near the discharging port 26, and this cylindrical shape. A discharge shooter that conveys large crushed stones that project into the discharge port 26 of the tubular body 23 and are scraped up by the scraping member 32 to the second discharge conveyor, by using the motor 24 that rotates the body 23 as the rotary sieve 21. The crushed stone sieving work vehicle according to claim 2, wherein 33 is provided. 4. A large number of small holes 22 are continuously formed from an inlet 25 to an outlet 26 of the tubular body 23.
The crushed stone sieving work vehicle described. 5. The crushed stone sieving work vehicle according to claim 3, wherein a stirring blade 71 is attached to an inner surface of the cylindrical body 23 near the charging port 25.