JPH07839A - Gravel crushing and gravel crusher - Google Patents

Abstract

PURPOSE:To enhance the crushing efficiency of gravel by installing axially a small diameter roller of a crushing mechanism at a higher position than a large diameter roller through a vibration means. CONSTITUTION:A large diameter roller 13 of paired rollers 13, 15, each having a different diameter from the other, with teeth 11 carved at right angles with an axial center, is axially attached to a drive shaft 19 on a base 17. In addition, a small diameter roller 15 is axially attached at a higher position than the large diameter roller 13 through a vibration means 23. A crushing mechanism 29 comprises the teeth 11, both rollers 13, 15, whose crests 25 and valleys 27 are engaged with each other with an appropriate space left in between. Further, gravel is fed into a clearance between both rollers 13, 15 from a gravel hopper 43. Then, the gravel is crushed by a pressing force generated by engagement between both rollers 13, 15 of the crushing mechanism 29, a pressing force generated by vibration of the small diameter roller 15, a pressing force generated by the self-weight of the small diameter roller 15 and a rubbing force generated by the peripheral velocity difference between both rollers 13, 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for crushing billy gravel and crushing billy gravel, which can be crushed to obtain sand (grain size 5 mm or less) by crushing billi gravel (grain size 5 mm to 10 mm), which can only be used for garden stones. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, river gravel and sand have been mainly used as aggregates (sand, gravel) used for concrete, but the river gravel collection regulation began around 1965,
Since then, the regulations for collecting gravel from rivers have become stricter, and now the collection of gravel from rivers is prohibited.

On the other hand, in the construction industry, the demand for sand and gravel is increasing more and more, and as a result, representative gravel other than river gravel and the source of sand are mountain gravel, mountain sand, sea sand, and crushed stones of mountains. Etc. began to be collected.

[0004] Here, gravel and sand are classified into rough gravel sieving, and sand having a grain size of 5 mm or less, sand having a grain size of 5 mm to 10 mm, gravel having a grain size of 10 mm to 25 mm, and others.

Of these, sand and gravel having a grain size of 10 to 25 mm are used as aggregates for concrete.

Therefore, in many gravel plant factories, a large amount of billi gravel having a grain size of 5 mm to 10 mm is left in a pile.

As a device for crushing the billy gravel, a device provided with a mechanism for crushing with a crusher, and a device for crushing by using a centrifugal force against a side wall are known.

[0008]

Conventionally, as described above,
Since the billi gravel itself has a small own weight, it has been a problem that it cannot be crushed by an impact such as a crusher or centrifugal force.

In view of such drawbacks, it is an object of the present invention to provide a billi gravel crushing method and billi gravel crushing apparatus capable of reliably crushing billi gravel into sand.

[0010]

The method of the present invention is a method of crushing gravel by a pair of rollers arranged in parallel, in which a large number of teeth having different diameters are engraved at right angles to the axis. The large diameter roller of the pair of rollers is attached to the drive shaft, the small diameter roller is attached to the position higher than the large diameter roller through the vibrating means so as to be free to move, and the ridges and valleys of the teeth of both rollers are mutually attached. Between the two rollers of the crushing mechanism, which are held at an appropriate interval and are meshed with each other, billy gravel is supplied from the billi gravel hopper, and the pressing force due to the meshing of both rollers of the crushing mechanism, the pressing force due to the vibration of the small diameter roller, the small diameter roller It is characterized in that the gravel gravel is crushed by the pressing force due to its own weight and the rubbing and rubbing force due to the difference in peripheral speed between both rollers.

In the apparatus of the present invention, a large-diameter roller of a pair of rollers having different diameters formed by engraving a large number of teeth at right angles to the shaft center is attached to a drive shaft, and the small-diameter roller is larger than the large-diameter roller. A billi hopper was provided above a crushing mechanism that is rotatably attached to a high position through a vibrating means, and the ridges and valleys of the teeth of both rollers are meshed with each other while keeping an appropriate gap therebetween. It is characterized by that.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A billi gravel crushing apparatus according to the present invention will be described with reference to FIGS.

A large-diameter roller 13 of a pair of rollers 13 and 15 having different diameters formed by engraving a large number of teeth 11 at right angles to the shaft center is mounted on a drive shaft 19 on a base 17. In this embodiment, the drive shaft 19 is an electric motor and is attached to the large diameter roller 13 via a belt 21.

The small-diameter roller 15 is movably attached to a position higher than the large-diameter roller 13 through the vibrating means 23, and the peaks 25 and the valleys 2 of the teeth 11 of both rollers 13 and 15 are provided.
A crushing mechanism 29 is provided which meshes 7 and 7 with each other at an appropriate interval.

In the present embodiment, the small diameter roller 15 is
It is pivotally attached to a support arm 31 having a vibrating means 23. An upper end of the support arm 31 is pivotally attached to a column 33 installed on the base 17, and a lower end of the support arm 31 is biased toward the base 17 by an elastic body 35 installed on the base 17. There is.

A space adjusting member 37 is provided at the lower end of the support arm 31 on the base 17 side. By adjusting the protrusion amount of the space adjusting member 37 with respect to the support arm 31, the meshing space between the rollers 13 and 15 is adjusted.

Above the crushing mechanism 29, a billy gravel hopper 43 having a billy gravel inlet 39 in the upper part and a billy gravel carry-out port 41 in the lower part is provided.

In the present embodiment, the billi gravel hopper 43
In order to control the amount of the billi gravel 53 discharged from the billi gravel outlet 41, the adjusting tool 45 faces the billi gravel hopper 43 on the billi gravel outlet 41 side of the billi gravel hopper 43 and the billi gravel hopper 43. Are arranged so that the height of the

The billy gravel hopper 43 and the crushing mechanism 29
A chute 51 provided with an adjusting tool 47 and a vibrating means 49 is disposed between and.

More specifically, the chute 51 can be tilted downward from the horizontal direction (arrow R) and has an opening at the top, and has a width equal to the length of both rollers 13 and 15 of the crushing mechanism 29. The adjusting plate 4 is provided on one side of the chute 51 (the right side in FIG. 2, the crushing mechanism 29 side).
7 is arranged so as to face the inside of the chute 51 and cover the height of the chute 51 by 4/5 or more (leaving a gap of one row of the billy gravel 53 to be carried out), and is controlled by the adjusting plate 45. Further, the amount of the billi gravel 53 is further reduced, and the billi gravel 53 is aligned in almost one line and is carried out to the crushing mechanism 29. At this time, since the chute 51 is vibrated by the vibrating means 49,
The billet gravel 53 arranged in a line by the adjusting plate 47 is uniformly carried out to the crushing mechanism 29.

Therefore, since the adjusting plate 45 and the adjusting plate 47 control the carry-out amount of the billy gravel 53 from the billi gravel hopper 43 to the crushing mechanism 29 in two steps, the billy gravel 53 is uniformly distributed to the crushing mechanism 29. Can be supplied.

Also, the billi gravel 5 in one step instead of two
3 for controlling the carry-out amount, the adjusting plate 4 of the chute 51
However, as a result of this, the gravel 53 is unevenly supplied between the rollers 13 and 15 of the crushing mechanism 29, resulting in uneven wear of the rollers 13 and 15, and There is a drawback that the replacement time of 15 becomes early.

A process of crushing billi gravel using the billi gravel crushing apparatus according to the present invention will be described with reference to FIGS.

First, the meshing interval between the rollers 13 and 15 of the crushing mechanism 29 and the projection amount of the interval adjusting member 37 of the supporting arm 31 with respect to the supporting arm 31 are adjusted according to the particle size of the sand to be crushed. By doing, it adjusts appropriately.

Next, a predetermined amount of billy gravel 53 is charged into the billy gravel hopper 43 through the billy gravel inlet 39.

Next, the vibrating means 49 of the chute 51, the drive shaft 19 of the large diameter roller 13 of the crushing mechanism 29, and the support arm 31 on which the small diameter roller 15 of the crushing mechanism 29 is mounted.
The respective vibrating means 23 are driven.

As each of the above elements is driven, the billi gravel 53 is carried out from the billi gravel carry-out port 41 of the billi gravel hopper 43 to one side of the chute 51 (left side in FIG. 2) via the adjusting plate 45, and then adjusted. Shoot 5 through board 47
Billi gravel 53 is carried out to the other side of 1 (right side in FIG. 2, crushing mechanism 29 side). At this time, the amount of the billy gravel 53 is controlled in two stages via the adjusting plate 45 and the adjusting plate 47, and is uniformly supplied to the crushing mechanism 29 in a substantially one-row state via the vibrating means 49 provided in the chute 51. To be done.

By adjusting the tilt angle (arrow R) of the chute 51 with respect to the horizontal direction, the gravel 53
Can be adjusted appropriately.

Next, both rollers 13, 1 of the crushing mechanism 29
Billi gravel 53, which was evenly supplied to the space between the 5
It is crushed by the pressing force due to the meshing of 3,15.

At this time, since the small-diameter roller 15 is axially mounted at a position higher than the large-diameter roller 13, the small-diameter roller 15 is placed on the large-diameter roller 13, and the weight of the small-diameter roller 15 is pressed by the pressing force. Acting as
Since the meshing position of the billy gravel 53 between the rollers 13 and 15 is obliquely from above, and the crushing of the billy gravel 53 starts from this position, the crushing force is greater than that when the shafts of the rollers 13 and 15 are at the same height. Will increase.

Since the small-diameter roller 15 is rotatably mounted via the vibrating means 23, the vibration of the vibrating means 23 is transmitted to the billy gravel 53 via the small-diameter roller 15, and this vibrating action causes the vibration. The crushing power increases.

Even if the billet gravel 53 is caught between the rollers 13 and 15, the small-diameter roller 15
Is elastically avoided from the large-diameter roller 13 via the elastic body 35, so that both rollers 13 and 15 do not bite and the small-diameter roller 15 elastically gives an impact to the large-diameter roller 13, The crushing efficiency of billy gravel 53 is good.

Further, at the moment when the billy gravel 53 is crushed due to a difference in peripheral speed due to the difference in diameter between the rollers 13 and 15, one side of the billy gravel 53 is provided by the large diameter roller 13 axially attached to the drive shaft 19. Since the rollers are forcibly brought into contact with each other at a high speed, the rollers 13 and 15 are drawn into each other at a high speed, and the gravel 5
Since the other side of 3 comes into contact with the small-diameter roller 15 at a low speed, it is drawn between both rollers 13 and 15 at a low speed, and as a result, the rubble gravel 53 has a rubbing action and the crushing force increases.

In this embodiment, both rollers 1
Although the planar shape of 3, 15 is uneven as shown in FIG. 3, it may be corrugated as shown in FIG.

Further, by driving the small-diameter roller 15, both rollers 13, 15 are driven, and the billy gravel 53 can be crushed more efficiently.

Even if the rollers 13 and 15 have the same diameter, the rubbing and rubbing action due to the difference in peripheral speed between the rollers 13 and 15 is reduced. As a result, the crushing force is slightly inferior, but the effect of the present invention is sufficiently obtained.

Further, in this embodiment, the small diameter roller 1 is used.
5 is free to move through the vibrating means 23, but by vibrating the base 17 together with the large diameter roller 13 through the large vibrating means (not shown), the small diameter roller 15
It is possible to omit the vibrating means 23 of the both rollers 13, 1
It is possible to vibrate 5 at a time.

Further, the billi gravel crushing device used in the billi gravel crushing method of the present invention does not have to be the same as that of the present embodiment, and a pair of rollers having different sizes, which are tooth-carved, are attached to the shaft mounting position. A crushing device including a crushing mechanism which has a height difference, a large diameter roller is driven, a small diameter roller is allowed to move freely, and teeth of both rollers are meshed with each other and a billi gravel hopper may be used.

Further, although the present embodiment is a method for crushing billi gravel, it is obvious that it can be used for other fields such as crushing of plastic, food (milling) and the like.

[0040]

According to the method for crushing billy gravel and the device for crushing gravel according to the present invention, the small-diameter roller of the crushing mechanism is movably attached to the position higher than the large-diameter roller through the vibrating means. In crushing the billi gravel between both rollers, in addition to the pressing force due to the meshing of both rollers, the pressing force due to the vibration of the small diameter roller, the pressing force due to the weight of the small diameter roller, the rubbing and rubbing force of the billi gravel due to the peripheral speed difference of both rollers, Since each of them works, the crushing efficiency of billi gravel is good.

[Brief description of drawings]

FIG. 1 is a front view of a billi gravel crushing device according to the present invention.

FIG. 2 is an enlarged front view of main parts of a billi gravel hopper and a chute.

FIG. 3 is a plan view of the main parts of both rollers of the crushing mechanism.

FIG. 4 is a plan view of a main part of another embodiment of both rollers of the crushing mechanism.

[Explanation of symbols]

 11 teeth 13 large diameter roller 15 small diameter roller 19 drive shaft 23 vibrating means 25 crests 27 valleys 29 crushing mechanism 43 billy gravel hopper 53 billy gravel

Claims (2)

[Claims] 1. A method for crushing gravel by a pair of rollers arranged in parallel, wherein a tooth (1
1) A pair of rollers with different sizes
The large diameter roller (13) of (13) and (15) is attached to the drive shaft (19), and the small diameter roller (15) is moved to a position higher than the large diameter roller (13) through the vibration means (23). While freely pivoting,
Both rollers (13), (of a crushing mechanism (29) in which the crests (25) and the valleys (27) of the teeth (11) of both rollers (13), (15) are meshed with each other with a proper gap therebetween. During the period (15), the billi gravel (53) is fed from the billi gravel hopper (43), and both rollers (1) of the crushing mechanism (29) are fed.
3), (15) meshing force, small diameter roller (15) vibration, small diameter roller (15) own weight,
A method for crushing billi gravel, characterized by crushing billi gravel by a rubbing and rubbing force due to a difference in circumferential speed between both rollers (13), (15). 2. A large-diameter roller (13) of a pair of rollers (13), (15) having different diameters formed by engraving a large number of teeth (11) at right angles to the axis and driving shaft (19). A small diameter roller
(15) is rotatably attached to a position higher than the large diameter roller (13) through a vibrating means (23), and both rollers (13),
A billi gravel hopper (43) was provided above the crushing mechanism (29) in which the ridges (25) and the valleys (27) of the teeth (11) of (15) are meshed with each other while keeping an appropriate interval. Billi gravel crushing device characterized by that.