JP7385451B2 - Sieve structure of sieve bucket - Google Patents

Description

The present invention relates to an improvement in a sieve structure in which only a sieve provided in a sieve bucket is oscillated.

A sieving bucket (skeleton bucket) has conventionally been used, for example, the bucket with a sieving function disclosed in Japanese Patent Application Laid-open No. 9-78624, which is attached to the tip of the operating arm of a civil engineering machine and is equipped with a vibration mechanism to collect scooped concrete waste, earth and sand. , a configuration is known in which a sieve net for sieving out gravel and the like is provided and the vibration mechanism is linked to the sieve net.
Furthermore, the bucket for a hydraulic excavator disclosed in Japanese Patent Application Laid-open No. 2005-16230 (Patent No. 3964831) covers an opening formed in almost the entire bottom plate of the bucket and is swingably supported at the center of the opening. A sieve member in which a large number of voids of different sizes are formed, and a rotary drive member connected via an eccentric member to a shaft support provided at one end of the sieve member. A configuration is known in which a rotating eccentric member causes the sieve member to reciprocate at an angle corresponding to the eccentricity of the sieve member to vibrate the collected items in the bucket, thereby making it possible to sieve out collected items with a size smaller than the above-mentioned gap. It is being
In the former sieve structure, the sieve net is divided into three parts, and the left and right sieve nets are swung through a pair of swinging connecting pieces by the rotation of an eccentric wheel, but each sieve net is separated from the same surface. Since the same movement is performed as the sieve, it takes time to sieve and is not effective.
The latter sieve structure has the same drawbacks, since the sieve body moves in the same way as the surface during rocking.

On the other hand, in the sieve structure of Unexamined Japanese Patent Publication No. 2018-3551, the present applicant has proposed that the sieve structure provided on the bottom of the sieve bucket extends from the bucket opening side to the back side of the bucket, and has a large number of vertical sieve structures arranged in parallel in the width direction of the bucket. Consisting of a frame portion and horizontal frame pieces that are integrally formed on the left and right sides of each vertical frame portion and extend in the horizontal direction,
The first horizontal frame piece of one adjacent first vertical frame part and the second horizontal frame piece of the other adjacent second vertical frame part are the same as those of the first vertical frame part and the second vertical frame part. They are arranged offset from each other without being aligned along the longitudinal direction, creating the mesh of a sieve.
The base end portions of the first vertical frame portion and the second vertical frame portion are provided with pivot portions that are pivotally connected on the same axis on the opening side of the bucket,
The sieve is characterized in that the tips of the first vertical frame part and the second vertical frame part are connected to a vertical movement drive part that pivots synchronously so that the vertical movement is reversed. We are proposing a structure.
Although the above configuration has achieved reasonable results, as a result of intensive training, the applicant has further researched a configuration that allows smooth movement of the first vertical frame portion and the second vertical frame portion, This led to the completion of the present invention.

Japanese Patent Application Publication No. 9-78624 Japanese Patent Application Publication No. 2005-16230 Unexamined Japanese Patent Publication No. 2018-3551

This invention was devised in view of the above circumstances, and is characterized in that the first vertical frame portion and the second vertical frame portion of the sieve structure provided on the bottom of the bucket are alternately moved up and down to vibrate efficiently. The purpose is to provide a sieve structure with a high quality.

In order to solve the above problems, the present invention has the following features:
A sieve structure provided on the bottom of the sieve bucket extends from the opening side of the bucket along the back side of the bucket, and is formed integrally with a number of vertical frames arranged in parallel in the width direction of the bucket, and on the left and right sides of each vertical frame. It consists of horizontal frame pieces that intersect at approximately right angles and extend in the horizontal direction, the vertical frame part and the horizontal frame piece form a sieve pattern, and the base ends of the vertical frame parts are on the same axis on the opening side of the bucket. The sieve structure of the sieve bucket is pivotally connected to the vertical frame portion by a pivot joint portion, and the tip of the vertical frame portion is connected to a vertical movement drive portion that alternately moves the vertical frame portion up and down. In,
The sieve structure consists of a combination of a front grill and a rear grill having a vertical frame portion and a horizontal frame piece,
The tip of the vertical frame of the front grill and the tip of the vertical frame of the rear grill are each made of one rod, and a link member is pivotally attached to the tip via a bracket. A link operating piece is provided in the center of the member,
The vertical movement drive unit has a swinging lever that is provided with an eccentric drive shaft at its base end and rotates eccentrically, and the tip of the swinging lever is pivotally connected to the link operating piece to connect the front grille and the rear grille. The sieve structure of the sieve bucket is characterized by the ability to alternately swing up and down.

The adjacent first vertical frame part and second vertical frame part are synchronously pivoted in the vertically opposite direction, and at the same time, the horizontal frame pieces integrally provided on each vertical frame part are also interlocked and pivoted in the vertically reversed direction. Since the sieve surface itself is displaced up and down for each vertical frame, it is possible to apply vertical vibrations at fine pitches to the sieved object scooped into the bucket, but the shape is appropriate for this purpose. By limiting the size and swing structure, efficient sieving work can be achieved.

It is a perspective view of a sieve bucket. FIG. 3 is a plan view showing a part of the sieve structure. It is a side view which shows the side view which shows one adjacent 1st vertical frame part. It is a side view which shows the other adjacent 2nd vertical frame part. FIG. 3 is a plan view showing the front grill. It is a top view which shows a rear grill. FIG. 7 is a side view with the front grille displaced upwards than the rear grille. FIG. 3 is a side view of the front and rear grilles in a state in which they are displaced to neutral positions. FIG. 7 is a side view of a state in which the rear grille is displaced above the front grille. FIG. 8 is a side view including the drive device displaced to the position of FIG. 7; FIG. 7 is a side view showing the drive device displaced to the position of FIG. 6;

The sieving structure on the bottom of the bucket can be adjusted by pivoting the first vertical frame on one side and the second vertical frame on the other side, which are adjacent to each other in the width direction of the bucket, in a relatively upside-down direction. It was possible to apply fine vibrations to the material, achieving efficient sieving.
Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a vibrating sieve bucket B whose bottom surface is formed into a sieve, and FIG. 2 is a plan view showing how the sieve structure 1 is attached to the proximal end side.
The sieve structure 1 is composed of a combination of a front grill G1 and a rear grill G2 (FIGS. 4 and 5).
The grilles G1 and G2 have vertical frame parts 11 and 12 and horizontal frame pieces 21 and 22 fixed to the vertical frame parts, and the vertical frame parts 11 and 12 are arranged alternately in the horizontal direction. It has a shape with many sieve openings.

The vertical frame portions 11 and 12 are a large number of vertical frame portions that extend in a substantially arc shape from the bucket opening side to the back side of the bucket, are plate-shaped with a substantially rectangular cross section, and are arranged in parallel in the width direction of the bucket. A large number of pairs of adjacent first vertical frame portions 11 and adjacent second vertical frame portions 12 are lined up as a set (see FIGS. 3(a) and 3(b)).

The first vertical frame portion 11 has a plurality of first horizontal frame pieces 21 integrally protruding outward from both left and right sides thereof and arranged at regular intervals along the longitudinal direction, and a plurality of second horizontal frame pieces 21. It consists of a large number of second horizontal frame pieces 22 that integrally protrude outward from both left and right side surfaces of the vertical frame portion 12 and are arranged at regular intervals along the longitudinal direction.

The first horizontal frame piece 21 and the second horizontal frame piece 22 are arranged offset from each other along the longitudinal direction of the first vertical frame part 11 and the second vertical frame part 12 without being aligned in the left-right direction. The first vertical frame portion 11 and the second vertical frame portion 12 form a sieve mesh E at regular intervals as a whole.

Therefore, the tip of the first horizontal frame piece 21 of the first vertical frame section 11 is separated from the side surface of the second vertical frame section 12 by a slight gap in the width direction without contacting the side surface of the second vertical frame section 12. The tip end of the second horizontal frame piece 22 is arranged with a slight gap between it and the side surface of the first vertical frame part 11 in the width direction without coming into contact with the side surface of the first vertical frame part 11.
The gap is set to a small size that prevents the objects to be sieved from falling.

Here, in addition to the respective first horizontal frame piece 21 or second horizontal frame piece 22, the side surface of the first vertical frame part 11 or the second vertical frame part 12 that is in contact with the side plate of the bucket B is Then, auxiliary horizontal frame pieces 23 and 24 are formed in the width direction to align with the second horizontal frame piece 22 or the first horizontal frame piece 21 formed on the adjacent vertical frame part, and the space between the bucket B and the side plate S is formed. (See Figure 1).

The first vertical frame portion 11 and the second vertical frame portion 12 each extend along the bottom surface of the bucket B and rise upward from the main body pieces 11A and 12A and the main body pieces 11A and 12A, respectively. It consists of tip parts 15 and 16.
The upper ends of the distal ends 15 and 16 of the plurality of first vertical frame parts 11 and second vertical frame parts 12 are integrally connected by one rod material 15a and 16a, respectively. A pair of brackets 17 and 18 are erected and connected to a vertical movement drive section 30.

The main body pieces 11A and 12A have the same shape, and the midway portion corresponding to the back corner of the bucket B is curved within a range of 90 degrees or more and 130 degrees or less.
Further, in this embodiment, the first horizontal frame piece 21 is formed on the main body piece part 11A of the first vertical frame part 11, and the second horizontal frame piece 22 is formed on the main body piece part 12A of the second vertical frame part 12. It is formed.

On the other hand, the tip portions 15 and 16 of the first vertical frame portion 11 and the second vertical frame portion 12 that exceed the respective main body pieces 11A and 12A are bent by 20 degrees or more with respect to either one to open the bucket. It is formed to protrude to the side.
In this embodiment, the tip 15 is set at an angle of 110° to 130°, and the tip 16 is set to an angle of 130° to 160°; conversely, the tip 16 is set to an angle of 110° to 130°. The angle may be set as follows, and the tip portion 15 may be set at an angle of 130° or more and 160° or less.

Further, the proximal end portions 13 and 14 of the main body pieces 11A and 12A of the first vertical frame portion 11 and the second vertical frame portion 12 are pivotally connected on the same axis on the opening side of the bucket B. It can be attached to 5.
In this embodiment, the opening side of the bucket B has a recess 2 into which the proximal ends 13 and 14 of the first vertical frame 11 and the second vertical frame 12 are inserted, and a recess 2 arranged on both sides of the recess 2 to provide a pivot point. A pivot portion 5 consisting of a bearing portion 3 for bearing the shaft is fixed.

Therefore, the proximal ends 13 and 14 of all the first vertical frame parts 11 and second vertical frame parts 12 to be attached to the bucket B are inserted into the recesses 2 of the respective pivot parts 5, and are spaced at equal intervals in the width direction. Position.
A hole through which a pivot shaft passes is formed in the proximal end portions 13 and 14 of the first vertical frame portion 11 and the second vertical frame portion 12, and the hole is aligned with a hole in the bearing portion 3.
Next, by inserting one pivot 4 through the holes of the bearing part 3 and the base end parts 13 and 14, the first vertical frame part 11 and the second vertical frame part 12 can freely pivot on the same axis line. It is pivoted to.

The distal end portions 15 and 16 of the first vertical frame portion 11 and the second vertical frame portion 12 are each integrally attached to one connecting rod, and from the base end portions 13 and 14 to the front of the distal end portions 15 and 16. They have substantially the same shape, and are formed so that the distal end portions 15 and 16 are shifted back and forth when the base end portions 13 and 14 are at the same position.

That is, in this embodiment, the tip 15 of the first vertical frame 11 extends to the rear of the bucket to form a rear grill, and the tip 16 of the second vertical frame 12 extends to the rear of the bucket. The front grille is bent so as not to overlap with the portion 15, and is provided with brackets 17 and 18 for pivoting with links described later (see FIGS. 3(a) and 3(b)).

The vertical movement drive section 30 is placed on the top of the bucket B (see FIGS. 9 and 10).
In this embodiment, the vertical drive unit 30 includes an eccentric drive shaft 31 rotated by a hydraulic motor (not shown), and a swing lever 32 to which the eccentric drive shaft 31 is attached at the base end.

On the other hand, the distal end 15 of the first vertical frame section 11 and the distal end section 16 of the second vertical frame section 12 are connected to brackets provided on the rod material 15a of the distal end section 15, as shown in FIGS. 4 and 5. 17 and the tip of the bracket 18 provided on the rod 16a of the tip portion 16, a link member 33 is spanned, and both ends of the link member 33 are pivotally connected to the upper portions of the brackets 17 and 18, respectively. ing.
A link operating piece 34 projects from approximately the center of the link member 33, and the tip of the swing lever 32 is pivotally attached to the link operating piece 34.

As a result, the eccentric movement of the eccentric drive shaft 31 causes the link operating piece 34 to swing via the swing lever 32, and the front grille G1 and the rear grille G2 to alternately swing up and down via the link member 33.
That is, when the first vertical frame part 11 side is displaced upward by the swinging of the link member 33, the second vertical frame part 12 side is displaced downward, and when the first vertical frame part 11 side is displaced downward, the second vertical frame part 12 side is displaced downwardly. The sides can be displaced upward and can be displaced up and down like a seesaw.

In this embodiment, the position where the main body pieces 11A and 12A of the first vertical frame part 11 and the second vertical frame part 12 overlap when viewed from the side is defined as a neutral position (see FIG. 7), and the second vertical frame part 12 is displaced upward from the neutral position, and at the same time, the first vertical frame portion 11 is displaced downward from the neutral position, allowing the mesh of the sieve to swing up and down (see FIG. 8).
Similarly, the second vertical frame part 12 side can swing downward from the vertically spaced swinging position, and at the same time, the first vertical frame part 11 side can pivot upward and be displaced to the swinging position shown in FIG.

As described above, the swinging of the swinging lever 32 in this embodiment is such that the length (vertical in the vertical direction) of the first horizontal frame piece 21 and the second horizontal frame piece 22 is the same as that of the first vertical frame part 11. When vertically pivoting the second vertical frame part 12, the length and swing angle do not exceed the vertical width (vertical length in the vertical direction) of the adjacent first vertical frame part 11 or second vertical frame part 12. is set to .
Thereby, even if the first vertical frame part 11 and the second vertical frame part 12 pivot up and down, the meshes of the sieve do not open, so that the sieving work can be performed accurately.

Although the above-mentioned vertical movement drive unit uses the hydraulic pressure of a hydraulic motor provided in the hydraulic excavator as a driving source, a separate hydraulic motor may be used.
Further, although eccentric drive is used in this embodiment, a known rotary drive structure may be used as long as the front grille G1 and the rear grille G2 can be vertically swung alternately.
Further, in this embodiment, the sieve structure 1 shows an example in which one first vertical frame part 11 and one second vertical frame part 12 are arranged alternately, but a plurality of one or both of them may be arranged in a row. Good too.

In addition, a part of the sieve structure, for example, the sieve openings in the center part, is fixed without vertically vibrating, and the first vertical frame part 11 and the second vertical frame part 12, which serve as the left and right sieve openings, are fixed. It may also have a structure that vibrates up and down.
It goes without saying that various other design changes can be made without changing the gist of the invention.

1 Sieve structure 2 Recessed part 3 Bearing part 1s
4 Pivot 5 Pivot attachment portion 11 First vertical frame portion 12 Second vertical frame portion 13 Base end portion 14 Base end portion 15 Tip portion 15a Rod material 16 Tip portion 16a Rod material 17, 18 Bracket 21 First horizontal frame piece 22 2 horizontal frame piece 23 Auxiliary horizontal frame piece 24 Auxiliary horizontal frame piece 26 First connection shaft 27 Second connection shaft 30 Vertical movement drive section 31 Eccentric drive shaft 32 Swing lever 33 Link member 34 Link operation piece
B Bucket S side plate

Claims (3)

A sieve structure provided on the bottom of the sieve bucket extends from the opening side of the bucket along the back side of the bucket, and is formed integrally with a number of vertical frames arranged in parallel in the width direction of the bucket, and on the left and right sides of each vertical frame. It consists of horizontal frame pieces that intersect at approximately right angles and extend in the horizontal direction, the vertical frame part and the horizontal frame piece form a sieve pattern, and the base ends of the vertical frame parts are on the same axis on the opening side of the bucket. The sieve structure of the sieve bucket is pivotally connected to the vertical frame portion by a pivot joint portion, and the tip of the vertical frame portion is connected to a vertical movement drive portion that alternately moves the vertical frame portion up and down. In,
The sieve structure includes a combination of a front grill and a rear grill having a vertical frame portion and a horizontal frame piece,
The tip of the vertical frame of the front grill and the tip of the vertical frame of the rear grill are each made of one rod, and a link member is pivotally attached to the tip via a bracket. A link operating piece is provided in the center of the member,
The vertical movement drive unit has a swinging lever that is provided with an eccentric drive shaft at its base end and rotates eccentrically, and the tip of the swinging lever is pivotally connected to the link operating piece to connect the front grille and the rear grille. The sieve structure of the sieve bucket is characterized by the ability to alternately swing up and down . The vertical frame includes a main body piece that extends along the bottom of the bucket and stands up at an angle on the rear side, and a pair of levers that rise upward from the main body piece and are provided at the front and rear of the vertical movement drive unit and extend in the front and back direction. It consists of a bracket that is connected to the
The main body piece has a middle portion curved in a range of 90° or more and 130° or less, and a horizontal frame piece is formed;
The tip of the vertical frame part is bent at least 20 degrees toward the bucket opening side with respect to one of the vertical frame parts, and is pivoted to a bracket arranged in front of the vertical movement drive part, and the other part is arranged in the rear part. The sieve structure of a sieve bucket according to claim 1, wherein the sieve bucket is pivotally attached to a bracket . Either the first vertical frame portion or the second vertical frame portion is bent in a range of 110° or more and 130° or less with respect to the main body piece, and the other is bent in a range of 130° or more and 160° or less. The sieve structure of the sieve bucket according to claim 1 or 2, wherein the sieve bucket has a sieve structure.

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