JP2020081902A - Sieving device - Google Patents

Abstract

To provide a sieving device that can promote vibration of a first rod-like member without placing large burdens on a vibration device.SOLUTION: The sieving device comprises a sieving main body that is vibrated by a vibration device, where the sieving main body has an inclined first sieving member 17. The first sieving member 17 has a plurality of first rod-like members 28 arranged parallel at predetermined intervals. The device sieves an object 2 while moving the object on the first rod-like members 28 toward terminal end sides by supplying the object 2 to the sieving main body. The sieving main body has a fixing member 36 and a receiving member 43. The first sieving member 17 is attached to the fixing member 36, at starting end part sides of the first rod-like members 28. The terminal end parts of the first rod-like members 28 are received by the receiving member 43 from below, in an unconstraint state where the parts are not constrained by the receiving member 43 and can freely vibrate, and the terminal end parts of the first rod-like members 28 vibrate with the starting end parts as supporting points, when vibrating the sieving main body.SELECTED DRAWING: Figure 12

Description

The present invention relates to a sieving device for sieving an object containing at least one of earth and sand and gravel.

Conventionally, as this type of sieving device, as shown in, for example, FIGS. 14 to 17, there is a sieving device having a sieving body 101 and a vibrating device 102 that applies vibration to the sieving body 101. The sieving body 101 has a frame 103, a plurality of upstream bar sieves 104 arranged in parallel at a predetermined interval, and a plurality of downstream bar sieves 105 arranged in parallel at a predetermined interval. ing.

The upstream bar screen 104 and the downstream bar screen 105 are provided in the frame body 103. The frame 103 has a pair of side plates 106 and a front plate 107.

An upstream slit 109 having a predetermined interval is formed between the upstream bar screens 104, and a downstream slit 110 having a predetermined interval is formed between the downstream bar screens 105.

The upstream bar sieve 104 is inclined so that the starting end side in the longitudinal direction C is higher than the ending end side. The front position and the rear position of the lower end portion of the upstream bar sieve 104 are connected and fixed to a pair of front and rear cross members 113 and 114 via a plurality of bolts 119, respectively. Both ends of each of the cross members 113 and 114 are fixed to the side plate 106 of the frame body 103.

Similarly, the downstream bar screen 105 is also connected and fixed to the pair of front and rear cross members 115 and 116 via a plurality of bolts 119, and both ends of each of the cross members 115 and 116 are fixed to the side plate 106 of the frame 103. There is.

According to this, the object 118 containing at least one of earth and sand and gravel is supplied onto the upstream bar screen 104, and the vibration is applied to the screen body 101 by the vibrating device 102, so that the object 118 is transferred onto the upstream bar screen 104. Is transferred to the downstream bar sieve 105 and sieved.

At this time, the front position and the rear position of the upstream bar screen 104 are evenly fixed in the longitudinal direction to the frame 103 via the cross members 113 and 114, respectively, and the upstream bar screen 104 vibrates integrally with the frame 103. To do. Similarly, the front position and the rear position of the downstream bar sieve 105 are evenly fixed in the longitudinal direction to the frame 103 via the cross members 115 and 116, respectively, and the downstream bar sieve 105 also vibrates integrally with the frame 103. To do.

The sieving apparatus 100 as described above is described in, for example, Patent Document 1 below.

JP 2000-325885 A

In the above conventional method, if the target 118 is clogged in the upstream slit 109 or the downstream slit 110, the target 118 may not be able to be efficiently screened. In order to prevent such clogging of the object 118, it is conceivable to promote vibration of the upstream bar sieve 104 and the downstream bar sieve 105. However, in order to promote the vibration of the upstream bar sieve 104 and the downstream bar sieve 105, it is necessary to promote the vibration of the frame body 103 as a whole, which causes an excessive load on the vibration device 102. In addition, there is a problem that the vibrating device 102 becomes large due to the necessity of the powerful vibrating device 102.

An object of the present invention is to provide a sieving device that can promote vibration of the first rod-shaped member without applying a large load to the vibration device.

In order to achieve the above object, the first aspect of the present invention includes a screen main body and a vibration device that vibrates the screen main body.
The sieving body has an inclined first sieving member,
The first sieving member has a plurality of first rod-shaped members arranged in parallel at first predetermined intervals,
A first slit is formed between the first rod-shaped members,
The first rod-shaped member is inclined so that the starting end side in the longitudinal direction is higher than the terminal end side,
A sieving apparatus in which an object containing at least one of earth and sand and gravel is supplied to a sieving main body so that the object is sieved while moving toward the terminal end on the first rod-shaped member,
The sieving body has a fixing member and a receiving member,
The first sieving member is attached to the fixing member on the starting end side of the first rod-shaped member,
The terminal end portion of the first rod-shaped member is received by the receiving member from below in a vibrating non-restrained state that is not constrained by the receiving member,
When the sieve body is vibrated, the first rod-shaped member vibrates at the terminal end with the starting end as a fulcrum.

According to this, the object is supplied onto the first sieving member of the sieving body, and the oscillating device vibrates the sieving body, whereby the object is sieving while moving toward the terminal end side on the first rod-shaped member. At this time, an object smaller than the width of the first slit passes through the first slit and falls below the first sieving member, and an object larger than the width of the first slit does not pass through the first slit. After moving to the end on the first rod-shaped member, it is discharged downward from the end of the first rod-shaped member.

When the sieve body is vibrating by the vibrating device, the end portion of the first rod-shaped member is in an unrestrained state, and the end portion of the first rod-shaped member freely vibrates with the start end as a fulcrum. The vibration of the first rod-shaped member can be promoted without applying a load. As a result, it is possible to prevent the object from clogging the first slit, and it is possible to efficiently screen the object.

In addition, when the object supplied on the first sieving member is heavy, the end portion of the first rod-shaped member is received from below by the receiving member, so that the end portion of the first rod-shaped member bends downward and is damaged. Can be prevented.

In the sieving apparatus according to the second aspect of the present invention, the first sieving member is fixed to the fixing member on the starting end side of the first rod-shaped member.

In the sieving apparatus according to the third aspect of the present invention, the width of the first rod-shaped member is reduced toward the terminal end,
The width of the first slit is such that it extends toward the terminal end.

According to this, the object is sieved while moving to the terminal end side on the first rod-shaped member, whereas the width of the first slit is expanded toward the terminal end, so that the object is the first slit. It is less likely to be clogged, and clogging of the object is further prevented.

In the sieving device according to the fourth aspect of the present invention, the receiving member has a cushioning member between the receiving member and the end portion of the first rod-shaped member.

According to this, since the shock generated by the vibration of the end portion of the first rod-shaped member is mitigated by the cushioning member, damage to the end portion of the first rod-shaped member can be prevented.

In the sieving apparatus according to the fifth aspect of the present invention, the sieving body has a second sieving member provided below the first sieving member and inclined in the same direction as the first sieving member,
The second sieving member has a plurality of second rod-shaped members arranged in parallel at a second predetermined interval,
A second slit is formed between the second rod-shaped members,
The second rod-shaped member is provided with the longitudinal direction intersecting the longitudinal direction of the first rod-shaped member,
The first rod-shaped member and the second rod-shaped member are separated from each other in the vertical direction.

According to this, the object is supplied onto the first sieving member of the sieving body, and the oscillating device vibrates the sieving body, whereby the object is sieving while moving toward the terminal end side on the first rod-shaped member. At this time, an object smaller than the width of the first slit passes through the first slit and falls below the first sieving member, and an object larger than the width of the first slit does not pass through the first slit. After moving to the end on the first rod-shaped member, it is discharged downward from the end of the first rod-shaped member.

The object that has passed through the first slit and dropped below the first sieving member as described above is received by the second sieving member, and is sifted while moving on the second sieving member toward the terminal end side. At this time, the object smaller than the width of the second slit passes through the second slit and falls below the second sieving member. An object larger than the width of the second slit does not pass through the second slit, moves on the second rod-shaped member to the end of the second sieving member, and is then discharged downward from the end of the second sieving member. It

Accordingly, a thin and slender object having a width smaller than the width of the first slit and a total length longer than the width of the second slit can be discharged downward from the end of the second sieving member and sieved. ..

In the sieving apparatus according to the sixth aspect of the present invention, a plurality of first sieving members are arranged in the longitudinal direction of the first rod-shaped member,
The object can be transferred from the terminal end of the upstream first sieving member adjacent in the longitudinal direction of the first rod-shaped member to the starting end of the downstream first sieving member.

According to this, by supplying the target object on the upstream first sieving member and vibrating the sieving body by the vibrating device, the target object is sieving while moving on the upstream first sieving member toward the terminal side. After that, the first sieving member is transferred to the starting end of the downstream first sieving member from the terminal end of the first sieving member, and is screened while moving to the terminal end on the downstream first sieving member.

In the sieving apparatus according to the seventh aspect of the present invention, the first rod-shaped member of the upstream first sieving member and the first slit of the downstream first sieving member which are adjacent to each other in the longitudinal direction of the first rod-shaped member are continuous at the same position. It is what you are doing.

According to this, when the object moving on the first rod-shaped member of the upstream first sieving member to the terminal side moves to the downstream side when moving from the upstream first sieving member to the downstream first sieving member. It moves onto the first slit of the first sieving member. This makes it possible to reliably screen the object.

In the sieving apparatus according to the eighth aspect of the present invention, the starting end portion of the first sieving member on the downstream side adjacent in the longitudinal direction of the first rod-shaped member also serves as the receiving member,
The end portion of the first sieving member on the upstream side is received by the start end portion of the first sieving member from below in a vibrating unconstrained state in which it is not restrained by the start end portion of the first sieving member on the downstream side. is there.

According to this, by feeding the target object onto the first sieving member on the upstream side of the sieving body and vibrating the sieving body by the vibrating device, the sieving is performed while the target object moves on the first rod-shaped member toward the terminal side. Be done.

When the object supplied onto the upstream first sieving member is heavy, the end portion of the first rod-shaped member of the upstream first sieving member is received from below by the starting end portion of the downstream first sieving member. It is possible to prevent the terminal end portion of the first rod-shaped member of the upstream first sieving member from bending downward and being damaged.

Moreover, since the starting end of the downstream first sieving member is also used as the receiving member, the number of receiving members can be reduced, and the weight and cost can be reduced.

In the sieving apparatus according to the ninth aspect of the present invention, the sieving main body has a movable base that is reciprocally movable in the front-rear direction along the longitudinal direction of the first rod-shaped member,
The movable base is supported on the support member via a plurality of wheels,
The vibrating device has a rotating body, a drive device for rotating the rotating body, and a connecting rod connected between the rotating body and the movable base,
The rotating body and the drive device are provided on the support member.

According to this, when the vibrating device rotates the rotating body, the rotational movement of the rotating body is converted into the reciprocating movement of the movable table through the connecting rod. At this time, since the wheels rotate as the movable table reciprocates in the front-rear direction, the movable table can be smoothly reciprocated and noise can be reduced.

Moreover, since the sieving main body can be vibrated by using a general-purpose motor as a driving device instead of a vibration motor, noise can be further reduced.

The tenth invention is a sieving device for sieving an object containing at least one of earth and sand and gravel,
It has a sieve body and a vibrating device for vibrating the sieve body,
The sieving body has an inclined first sieving member and a second sieving member provided below the first sieving member and inclined in the same direction as the first sieving member,
The first sieving member has a plurality of first rod-shaped members arranged in parallel at first predetermined intervals,
A first slit is formed between the first rod-shaped members,
The first rod-shaped member is inclined so that the starting end side in the longitudinal direction is higher than the terminal end side,
The second sieving member has a plurality of second rod-shaped members arranged in parallel at a second predetermined interval,
A second slit is formed between the second rod-shaped members,
The second rod-shaped member is provided with the longitudinal direction intersecting the longitudinal direction of the first rod-shaped member,
The first rod-shaped member and the second rod-shaped member are separated from each other in the vertical direction.

According to this, the object is supplied onto the first sieving member of the sieving body, and the oscillating device vibrates the sieving body, whereby the object is sieving while moving toward the terminal end side on the first rod-shaped member. At this time, an object smaller than the width of the first slit passes through the first slit and falls below the first sieving member, and an object larger than the width of the first slit does not pass through the first slit. After moving to the end on the first rod-shaped member, it is discharged downward from the end of the first rod-shaped member.

The object that has passed through the first slit and dropped below the first sieving member as described above is received by the second sieving member, and is sifted while moving on the second sieving member toward the terminal end side. At this time, the object smaller than the width of the second slit passes through the second slit and falls below the second sieving member. Further, an object larger than the width of the second slit does not pass through the second slit, moves on the second rod-shaped member to the end of the second sieving member, and is then discharged downward from the end of the second sieving member. It

Accordingly, a thin and slender object having a width smaller than the width of the first slit and a total length longer than the width of the second slit can be discharged downward from the end of the second sieving member and sieved. ..

As described above, according to the present invention, since it is possible to promote the vibration of the first rod-shaped member without applying an excessive load to the vibration device, it is possible to prevent the object from clogging the first slit, It is possible to efficiently screen an object.

In addition, when the object supplied on the first sieving member is heavy, the end portion of the first rod-shaped member is received from below by the receiving member, so that the end portion of the first rod-shaped member bends downward and is damaged. Can be prevented.

It is a partially notched side view of the sieving apparatus in the embodiment of the present invention. FIG. 3 is a plan view of the same sieving apparatus. FIG. 3 is a sectional view of a sieving body of the sieving device. It is a XX arrow line view in FIG. FIG. 3 is a plan view of the body frame of the sieving body of the sieving apparatus. FIG. 3 is a plan view of the first sieving member on the upstream side of the sieving device. It is a XX arrow line view in FIG. FIG. 3 is a partially enlarged plan view of the first sieving member on the upstream side of the sieving device. It is a XX arrow line view in FIG. FIG. 3 is a plan view of the first sieving member on the downstream side of the sieving device. It is a XX arrow line view in FIG. FIG. 3 is an enlarged cross-sectional view showing the mounting structure of the first sieving members on the upstream side and the downstream side of the sieving apparatus. FIG. 3 is a plan view of a second sieving member of the sieving device. It is a front view of the conventional sieving apparatus. FIG. 3 is a plan view of the same sieving apparatus. FIG. 3 is a side view of the sieving device. FIG. 3 is a sectional view showing the inside of the sieving body of the sieving device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIGS. 1 and 2, 1 is a sieving device for sieving an object 2 containing at least one of earth and sand and gravel. The sieving device 1 includes a movable support frame 4 (an example of a support member), a sieving body 5 provided on the support frame 4, and a vibrating device 6 that vibrates the sieving body 5.

The support frame 4 includes a quadrangular upper frame frame 9, four front, rear, left and right leg frames 10 suspended from the four corners of the upper frame frame 9, and wheels 11 for movement provided at the lower ends of the leg frames 10. have. A space 12 is secured below the upper frame 9 so that a loading platform 66 of a transportation vehicle 65 such as a truck can move in and out.

The sieving main body 5 includes a movable base 14 that is reciprocally movable in the front-rear direction A, a main body frame 15 provided on the movable base 14, and a plurality of inclined first sieving members 16 and 17 and a second sieving member 18. Have

The movable table 14 has a rectangular frame body 19 which is opened in the vertical direction, and wheels 20 provided on the front, rear, left and right sides of the frame body 19. The plurality of wheels 20 are supported and guided by a pair of left and right rails 21 provided on the upper frame 9.

As shown in FIGS. 4 and 5, the main body frame 15 is U-shaped in a plan view and has a front wall portion 24 and a pair of left and right side wall portions 25.

As shown in FIGS. 6 to 9, the upstream-side first sieving member 16 includes a plurality of first rod-shaped members 28 arranged in parallel at a first predetermined interval B and each first rod-shaped member 28. Is a comb tooth-shaped member having a flat plate portion 29 integrally connected to the front end portion (starting end portion) thereof. Further, a first slit 34 having a first predetermined interval B is formed between the first rod-shaped members 28. The first rod-shaped member 28 has an elongated top plate 31 and ribs 32 provided on the back side of the top plate 31. As shown in FIG. 3, the first rod-shaped member 28 is inclined so that the front end side (start end side) in the longitudinal direction C is higher than the rear end side (terminal end side).

In addition, as shown in FIG. 8, the width Wb of the first rod-shaped member 28 is reduced toward the rear end portion (terminal portion), and the width Ws of the first slit 34 (that is, the first predetermined interval B) is equal to the rear end portion ( The end is enlarged.

Further, as shown in FIGS. 10 and 11, the downstream first sieving member 17 also has the same configuration as the upstream first sieving member 16. A channel-shaped locking member 42 is provided on the lower surface of the front end (starting end) of the downstream first sieving member 17. The lower part of the locking member 42 is open.

As shown in FIG. 4, the first rod-shaped member 28 of the upstream first sieving member 16 and the first slit 34 of the downstream first sieving member 17 are the same in the longitudinal direction C of the first rod-shaped member 28. It is continuous in position.

As shown in FIG. 3 and FIG. 5, an upstream fixed frame 35 (an example of a fixed member) is provided on the front wall portion 24 of the main body frame 15, and a downstream fixed frame 36 is provided between both side wall portions 25. (An example of a fixing member) and a receiving member 43 are provided. The side wall portion 25 is provided with a pair of left and right upstream support frames 37 and a downstream support frame 38.

As shown in FIGS. 3 to 5 and 12, the upstream first sieving member 16 is located at the front end side of the first rod-shaped member 28 (that is, the flat plate portion 29 that is the starting end side of the first rod-shaped member 28). , Is fixedly connected to the upstream fixed frame 35 via a plurality of bolts and nuts 40. The left and right ends of the upstream first sieving member 16 are supported by a pair of upstream support frames 37.

In addition, by fitting the locking member 42 of the downstream first sieving member 17 onto the downstream fixed frame 36 from above, the downstream first sieving member 17 is attached to the front end side of the first rod-shaped member 28 ( That is, the flat plate portion 29) which is the starting end portion side of the first rod-shaped member 28 is attached to the downstream fixed frame 36. Further, the left and right ends of the downstream first sieving member 17 are supported by a pair of downstream support frames 38.

The rear end portion (end portion) of the first rod-shaped member 28 of the downstream first sieving member 17 is received by the receiving member 43 from below in a vibrating non-restrained state in which the first rod-shaped member 28 is not restrained by the receiving member 43.

The receiving member 43 has a cushioning member 44 between the receiving member 43 and the rear end portion of the first rod-shaped member 28.
The rear end portion (end portion) of the first rod-shaped member 28 of the upstream first sieving member 16 is in a vibrating unrestrained state in which it is not restrained by the flat plate portion 29 (starting end portion) of the downstream first sieving member 17. It is received from below by the flat plate portion 29 of the first sieving member 17 on the downstream side. The flat plate portion 29 of the downstream first sieving member 17 has a buffer member 45 between the flat plate portion 29 and the rear end portion of the first rod-shaped member 28 of the upstream first sieving member 16. That is, the flat plate portion 29 of the downstream first sieving member 17 also serves as the receiving member. A rubber plate or the like is used for the cushioning members 44 and 45.

The object 2 can be transferred from the terminal end of the upstream first sieving member 16 adjacent in the longitudinal direction C of the first rod-shaped member 28 to the starting end of the downstream first sieving member 17.

As shown in FIGS. 3 and 13, the second sieving member 18 is provided inside the main body frame 15, is located below both the first sieving members 16 and 17, and is also the first sieving members 16 and It is inclined in the same direction as 17. The second sieving member 18 has a plurality of second rod-shaped members 50 arranged in parallel at a second predetermined interval S and a discharge plate 52 provided at the rear end portion. A second slit 51 having a second predetermined spacing S is formed between the second rod-shaped members 50.

The second rod-shaped member 50 is a member having an L-shaped cross section, and is provided such that its longitudinal direction D is orthogonal (an example of intersection) to the longitudinal direction C of the first rod-shaped member 28. The first rod-shaped member 28 and the second rod-shaped member 50 are separated from each other in the vertical direction.

As shown in FIGS. 1 and 2, the vibrating device 6 includes a disc-shaped rotating body 55, a driving device 56 for rotating the rotating body 55, and a connecting member connected between the rotating body 55 and the movable base 14. And a rod 57. The drive device 56 includes a rotating shaft 58, a motor 59, an endless belt 60 that transmits the rotation of the motor 59 to the rotating shaft 58, and pulleys 61 and 62.

The rotating body 55 is attached to one end of the rotating shaft 58. Further, the pulley 61 is attached to the other end of the rotary shaft 58, the pulley 62 is attached to the output shaft of the motor 59, and the belt 60 is wound between the pulleys 61 and 62. The rotating body 55 and the driving device 56 are provided on the upper frame 9 of the support frame 4.

The operation of the above configuration will be described below.

When sieving the object 2 using the sieving device 1, the loading platform 66 of the transport vehicle 65 is inserted below the upper frame 9 of the support frame 4 as shown by phantom lines in FIGS. 1 and 2. ..

By driving the motor 59 of the vibrating device 6, the rotation of the motor 59 is transmitted to the rotating body 55 via the pulleys 61 and 62, the belt 60, and the rotating shaft 58, and the rotating body 55 rotates, so that the rotating body 55 rotates. The motion is converted into a reciprocating motion of the movable base 14 (reciprocating motion in a straight line) through the connecting rod 57. As a result, the sieve body 5 vibrates.

At this time, since the wheels 20 rotate as the movable base 14 reciprocates in the front-rear direction A, the movable base 14 can be smoothly reciprocated and noise can be reduced.

Further, as the driving device 56, a general-purpose motor 59 can be used instead of the vibration motor to vibrate the sieving main body 5, so that the noise can be further reduced.

By supplying the target object 2 onto the upstream first sieving member 16 while the sieving body 5 is vibrating, the target object 2 moves from the starting end side to the terminating side on the upstream first sieving member 16. Further, the first sieving member 16 on the upstream side is transferred to the first sieving member 17 on the downstream side, and the sieving is performed while moving on the first sieving member 17 on the downstream side from the start end side to the end side.

At this time, as shown in FIG. 8, the object 2 that is smaller than the width Ws (that is, the first predetermined interval B) of the first slits 34 of the first sieving members 16 and 17 passes through the first slits 34 and then moves to the first slit 34. The object 2 falling below the first sieving members 16 and 17 and having a width Ws larger than the width Ws of the first slit 34 does not pass through the first slit 34 but moves on the first sieving members 16 and 17, and then downstream. Is discharged from the rear end of the first rod-shaped member 28 of the first sieving member 17 and drops onto the discharge plate 52 of the second sieving member 18 and is discharged downward from the discharge plate 52 to the rear of the transport vehicle 65. It is collected in the installed container 68.

Further, the object 2 that has passed through the first slit 34 and dropped below the first sieving members 16 and 17 as described above is received by the second sieving member 18 and moves on the second sieving member 18 toward the rear end side. Is screened while moving to. At this time, as shown in FIG. 13, the object 2 smaller than the width of the second slit 51 (that is, the second predetermined interval S) passes through the second slit 51 and falls below the second sieving member 18. Then, it passes through the frame 19 of the movable platform 14 from above to below, and is received by the loading platform 66 of the transport vehicle 65.

Further, the object 2 having a width larger than the width of the second slit 51 (that is, the second predetermined interval S) does not pass through the second slit 51, and goes over the second rod member 50 to the rear end of the second sieving member 18. After moving, it is discharged downward from the discharge plate 52 and collected in the container 68.

As a result, the width is smaller than the width Ws of the first slit 34 (that is, the first predetermined distance B) and the total length is longer than the width of the second slit 51 (that is, the second predetermined distance S). The elongated object 2 (see the phantom line in FIGS. 8 and 13) can be discharged downward from the rear end of the second sieving member 18 and sieved.

When the sieving body 5 is vibrating by the vibrating device 6 as described above, the rear end portions of the first rod-shaped members 28 of the first sieving members 16 and 17 are in an unrestrained state, as shown by the phantom line in FIG. In addition, the rear end portions of the first rod-shaped members 28 of the first sieving members 16 and 17 freely vibrate with the front end portion (starting end portion) as a fulcrum. Therefore, the vibration of the first rod-shaped member 28 can be promoted without applying an excessive load to the vibration device 6. Thereby, the target 2 can be prevented from being clogged in the first slit 34, and the target 2 can be efficiently sieved.

Moreover, when the target object 2 supplied on the upstream first sieving member 16 is heavy, the rear end portion of the first rod-shaped member 28 of the upstream first sieving member 16 is from the lower side to the downstream first sieving member. Since it is received by the flat plate portion 29 of 17, the rear end portion of the first rod-shaped member 28 of the upstream first sieving member 16 can be prevented from being bent and damaged downward.

When the target object 2 supplied on the downstream first sieving member 17 is heavy, the rear end of the first rod-shaped member 28 of the downstream first sieving member 17 is received by the receiving member 43 from below. It is possible to prevent the rear end portion of the first rod-shaped member 28 of the downstream first sieving member 17 from being bent downward and damaged.

As described above, in the upstream first sieving member 16, the flat plate portion 29 of the downstream first sieving member 17 is also used as the receiving member, so that the number of the receiving members 43 can be reduced and the weight is light. And cost reduction can be achieved.

Further, the shock generated by the free vibration of the rear end portion of the first rod-shaped member 28 is mitigated by the cushioning members 44 and 45, so that the rear end portion of the first rod-shaped member 28 is prevented from being damaged. You can

Further, the object 2 is sieved while moving to the rear end side on the first rod-shaped member 28, while the width Ws of the first slit 34 is increased toward the rear end as shown in FIG. Therefore, the object 2 is less likely to be clogged in the first slit 34, and the object 2 is further prevented from being clogged.

In addition, as shown in FIG. 4, the object 2 that moves to the rear end side on the first rod-shaped member 28 of the upstream first sieving member 16 is from the upstream first sieving member 16 to the downstream first sieving member 16. When transferring to the sieving member 17, it moves onto the first slit 34 of the first sieving member 17 on the downstream side. Thereby, the object 2 can be reliably sieved.

The sieving apparatus 1 as described above is used as follows, for example, in a burying method of burying a pipe in the ground.

First, the ground is excavated using an excavator to form a groove on the ground. Next, the generated soil (an example of the object 2) generated by excavation is sieved into small-diameter soil having a predetermined size or less and large-diameter soil having a larger size than the predetermined size by using the sieving device 1. Divide. At this time, the small particle size soil is received from the sieving apparatus 1 on the loading platform 66 of the transport vehicle 65, and the large particle size soil is discharged downward from the discharge plate 52 of the second sieving member 18 and collected in the container 68. To be done.

After that, a tube is arranged in the groove, and the sieved small particle size soil is put into the groove, and the periphery of the tube is backfilled with the small particle size soil. Then, the sieved large-diameter soil is put on the small-diameter soil layer formed in the groove to backfill the groove.

In the above embodiment, the interval between the first rod-shaped members 28 is set to the first predetermined interval B and the interval between the second rod-shaped members 50 is set to the second predetermined interval S. B and the second predetermined interval S may be the same interval or different intervals.

In the above-described embodiment, as shown in FIG. 4, the first rod-shaped member 28 of the upstream first sieving member 16 and the first slit 34 of the downstream first sieving member 17 are formed of the first rod-shaped member 28. In the longitudinal direction C, they are continuous at the same position, but here, the same position is arranged at a position where the center of the first rod-shaped member 28 in the width direction and the center of the first slit 34 in the width direction overlap. However, the present invention is not limited to such an arrangement, and may be arranged at a position where a part of the first rod-shaped member 28 in the width direction and a part of the first slit 34 in the width direction overlap each other. ..

In the above-mentioned embodiment, as shown in FIG. 3, the second sieving member 18 and both the first sieving members 16 and 17 are inclined in the same direction, but if the inclined directions are the same, respectively. May have different inclination angles.

In the above-described embodiment, the longitudinal direction C of the first rod-shaped member 28 and the longitudinal direction D of the second rod-shaped member 50 are orthogonal to each other, but the invention is not limited to the orthogonality, and they intersect at an angle other than 90°. May be.

In the above-described embodiment, as shown in FIG. 3, the sieving main body 5 has two first sieving members 16 and 17 on the upstream side and the downstream side. There may be one or more or only one.

1 Screening device 2 Object 4 Support frame (support member)
5 Sieve main body 6 Vibration device 14 Movable stand 16,17 1st sieving member 18 2nd sieving member 20 Wheel 28 1st rod-shaped member 34 1st slit 35,36 Fixed frame (fixed member)
43 receiving members 44, 45 cushioning member 50 second rod-shaped member 51 second slit 55 rotating body 56 driving device 57 connecting rod B first predetermined interval C longitudinal direction of first rod-shaped member D longitudinal direction of second rod-shaped member S 2 Specified interval Wb Width of first rod member Ws Width of first slit

Claims (10)

It has a sieve body and a vibrating device for vibrating the sieve body,
The sieving body has an inclined first sieving member,
The first sieving member has a plurality of first rod-shaped members arranged in parallel at first predetermined intervals,
A first slit is formed between the first rod-shaped members,
The first rod-shaped member is inclined so that the starting end side in the longitudinal direction is higher than the terminal end side,
A sieving apparatus in which an object containing at least one of earth and sand and gravel is supplied to a sieving main body so that the object is sieved while moving toward the terminal end on the first rod-shaped member,
The sieving body has a fixing member and a receiving member,
The first sieving member is attached to the fixing member on the starting end side of the first rod-shaped member,
The terminal end portion of the first rod-shaped member is received by the receiving member from below in a vibrating non-restrained state that is not constrained by the receiving member,
A sieving apparatus, wherein when the sieving body is vibrated, the first rod-shaped member vibrates at the terminal end with the starting end as a fulcrum. The sieving device according to claim 1, wherein the first sieving member is fixed to the fixing member on the starting end side of the first rod-shaped member. The width of the first rod-shaped member decreases toward the end,
The sieving apparatus according to claim 1 or 2, wherein the width of the first slit is increased toward the terminal end. The sieving apparatus according to any one of claims 1 to 3, wherein the receiving member has a cushioning member between the receiving member and the end portion of the first rod-shaped member. The sieving body is provided below the first sieving member and has a second sieving member inclined in the same direction as the first sieving member,
The second sieving member has a plurality of second rod-shaped members arranged in parallel at a second predetermined interval,
A second slit is formed between the second rod-shaped members,
The second rod-shaped member is provided so that the longitudinal direction intersects the longitudinal direction of the first rod-shaped member,
The sieving apparatus according to any one of claims 1 to 4, wherein the first rod-shaped member and the second rod-shaped member are separated from each other in the vertical direction. A plurality of first sieving members are arranged in the longitudinal direction of the first rod-shaped member,
The object can be transferred from the terminal end of the upstream first sieving member adjacent in the longitudinal direction of the first rod-shaped member to the starting end of the downstream first sieving member. The sieving apparatus according to any one of 5 above. The first rod-shaped member of the upstream first sieving member and the first slit of the downstream first sieving member which are adjacent to each other in the longitudinal direction of the first rod-shaped member are continuous at the same position. The sieving apparatus according to item 6. The starting end portion of the downstream first sieve member adjacent in the longitudinal direction of the first rod-shaped member also serves as the receiving member,
That the end portion of the first sieving member on the upstream side is received by the start end portion of the first sieving member from the lower side in a vibrating unrestrained state not constrained by the start end portion of the first sieving member on the downstream side. The sieving device according to claim 6 or 7, characterized in that The sieving body has a movable base that can reciprocate in the front-rear direction along the longitudinal direction of the first rod-shaped member,
The movable base is supported on the support member via a plurality of wheels,
The vibrating device has a rotating body, a drive device for rotating the rotating body, and a connecting rod connected between the rotating body and the movable base,
The sieving device according to any one of claims 1 to 8, wherein the rotating body and the driving device are provided on a supporting member. A sieving device for sieving an object containing at least one of earth and sand and gravel,
It has a sieve body and a vibrating device for vibrating the sieve body,
The sieving body has an inclined first sieving member and a second sieving member provided below the first sieving member and inclined in the same direction as the first sieving member,
The first sieving member has a plurality of first rod-shaped members arranged in parallel at first predetermined intervals,
A first slit is formed between the first rod-shaped members,
The first rod-shaped member is inclined so that the starting end side in the longitudinal direction is higher than the terminal end side,
The second sieving member has a plurality of second rod-shaped members arranged in parallel at a second predetermined interval,
A second slit is formed between the second rod-shaped members,
The second rod-shaped member is provided with the longitudinal direction intersecting the longitudinal direction of the first rod-shaped member,
A sieving device characterized in that the first rod-shaped member and the second rod-shaped member are separated from each other in the vertical direction.

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