JPS60235676A - Device for removing clogging of grizzly - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for easily removing large chunks of rock or the like stuck between the bars of a grizzly.

Traditionally, the sieves of large lumps contained in the raw material (river gravel and one-shot crushed raw rock) have been used to produce aggregate for concrete at construction sites such as dams, and the sifted portion of the large lumps contained in the raw material (river gravel and one-shot rough stone) are used to transport soil for landfill using belt conveyors. Grizzly equipment is used to coarsely sieve aggregate raw materials, such as sieving large lumps that cannot be transported.

The basic structure of a grizzly device is an inclined grizzly surface with multiple long bars arranged side by side. Large and small rocks are directly dropped onto this grizzly surface from a dump truck, etc., and the aggregate material is roughened between the long bars. Perform sieving. For this reason, large chunks of rock often get stuck between the bars that make up the grizzly surface, causing a clogging condition.If this clogging condition is left unattended and rocks are dropped one after another from a dump truck, etc., clogging will occur. The clogged waves further spread from the spot to the surrounding area.

The sieves possessed by grizzlies significantly reduce their functionality. Moreover, once the clogging has spread into lumps, it takes a lot of time and effort to remove it, so the amount of sieving caused a significant delay in the overall work.

Currently, the method of removing this blockage is to directly remove the large blockage with a crowbar, etc.

Alternatively, direct methods are used, such as knocking it down with a hammer, crushing it with a special blaster or blasting, or even tying wires around the large lump and hoisting it up with a crane or the like. These methods have disadvantages in that the work is mainly done on an inclined grizzly surface, which poses many dangers to the workers, and the removal work takes a lot of time.

On the other hand, there are mechanical methods that involve tilting the entire grizzly surface with a winch, etc., or using hydraulic pressure from a rock remover or backhoe, but these methods require equipment such as a winch, rock remover, and dedicated backhoe, and an operator. Therefore, the main body of the device and the spare equipment were large-scale, which caused problems in terms of cost.

The present invention has been devised in view of the above problems, and the grizzly surface is composed of a fixed bar and a movable bar, and by moving the movable bar, the grizzly eyes are enlarged and clogging of the grizzly is caused. The purpose of the present invention is to provide a device that removes large lumps by letting them fall naturally or slide down, and the coarse sieving capacity of the grizzly device is always maintained constant.

In order to achieve this object, the present invention comprises an upper pedestal and a lower pedestal, and a fixed bar and a movable bar are arranged alternately in parallel between the bookshelves to form a grizzled surface, and the movable bar is rotated by a pair of jacks. The outline of this is to:

DESCRIPTION OF THE PREFERRED EMBODIMENTS The grizzly clog removal device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an overall perspective view of the grizzly device.

The grizzly device has an inclined grizzly surface 3 between an upper pedestal 1 and a lower pedestal 2.

The upper frame 1 is integrally provided in a stepped manner under the roadway of a dump truck for transporting raw materials by pouring concrete or the like.

Further, the lower pedestal 2 has a distance from the upper pedestal 1 approximately equal to the length of the grizzly surface 3, and is formed in the same manner as the upper pedestal 1 at a lower position.

On the upper surface 11 of the upper pedestal 1 and the upper surface 21 of the lower pedestal 2, fixed bars 31, 31... and movable bars 32 are arranged in a comb pattern.
．． 32... are arranged in parallel alternately to form a grizzled surface 3 having grizzled eyes 33. Fixed bar 31.31
. . . and the movable bars 32, 32 . . . are each made of, for example, a prismatic long member. Movable bar 32.3
2... are longer members than the fixed bars 31, 31... and extend outward from the lower frame 2 by the length thereof. A movable support beam 4 is arranged on the lower surface of the extended portion of the movable bars 32, 32, . . . in a direction perpendicular to the movable bars 32, 32, .

The movable support beam 4 has a pair of jacks 5.5 pivotally attached to both ends, and when the jacks 5.5 are driven by the control device 6, the rods 51, 51 are expanded and contracted to push up or pull down the movable bar 32.32. It has become.

The jacks 5, 5 may be of any driving type, such as an electric screw, a mechanical type, a hydraulic type, or a pneumatic type.

Incidentally, a shockproof plate 13 is provided near the upper frame 1 of the grizzly surface 3, and rocks from a dump truck are directly dropped onto this shockproof plate 13 to prevent large lumps from becoming firmly jammed between the bars. It is also provided to disperse the dropped rocks in a flat manner. Moreover, the tip of the impact plate 13 is brought into contact with the reinforcing plate 14 14 fixed to the upper surface of each bar, so that the impact plate 1
The structure is such that the thrust caused by the bar 31, 32 is transmitted to the thrust receiving plate 15 provided near the tip of the bar 31, 32. In addition, a cover 18 is provided to protect the jack 5.5 as necessary.
．． 18 is installed.

FIG. 2 is a side sectional view showing how the fixing bar 31 is installed.

The fixing bars 31, 31... are connected to the lower frame 2 near their tips.
It is placed on a pillow stand 7 provided on the upper surface 21 of the. On the other hand, the rear end is fixed to a mounting bracket 8 mounted on the upper surface 11 of the upper frame 1.

FIG. 3 is a side sectional view illustrating the arrangement and rotating state of the movable bar 32.

The movable bar 32 is also arranged in the same direction as the fixed bar 31, and the vicinity of its tip is connected to the pillow base 7 provided on the upper surface 21 of the lower frame 2.
It is placed on. A pivot bracket 9 mounted on the upper surface ll of the upper frame 1 and a pivot bracket 10 fixed to the rear end of the movable bar 32 are pivotally connected by a pivot P.

In such a state, the movable support beam 4 is brought into contact with the lower surface of the extended portion of the tip of the movable bar 32, and the movable support beam 4
By driving the movable bar 32, the movable bar 32 is rotated. In other words, if the rods 51 and 51 of the jacks 5 and 5 are expanded and contracted, the movable bar 32 of the grizzly surface 3 is moved through the movable support beam 4.
, 32 . . . as a whole rotate in the vertical direction around the pivots P, P . . . .

Incidentally, in order to rotate the movable bars 32, 32, . . . downward, it is necessary to provide the lower mount 2 and the bed base 7 with a guide in advance.

The rotating state of the movable bar 32 shown by the imaginary line in FIG. 3 shows the state in which the rod 51.51 is extended and rotated upward (in the direction of the arrow) by the drive of the jack 5.5. It is something that Further, if necessary, the connecting beam 12 can be attached to the rear ends of the movable bars 32, 32, .

In the Grizzly clogging removing device having the structure as described above, clogging removal will be specifically explained.

FIG. 4(a) shows a movable bar 32 between fixed bars 31 and 31.
It is a partially omitted perspective view of the grizzly surface 3 on which the grizzly surface 3 is disposed. On this grizzly surface 3, the grizzly eyes 33 formed by the fixed bar 31 and the movable bar 32 are clogged with large chunks G of the thrown rocks.

FIG. 4(b) is a sectional view taken along the line A--A in FIG. 4(a).

In this state where a large chunk of rock G is stuck between the grizzly surfaces 33, the movable bar 32 is rotated nine times as shown in the partially omitted perspective view of FIG. 5(a) as described above. The rod 51 of the jack 5, 5, . Expand and contract 51,
The lower surface of the extended end of the movable bar 32 is pushed up or pulled in by the movable support beam 4. Then the movable bar 3
2.32... rotates around a pivot P provided at the rear end.

FIG. 5(a) shows a state in which the movable bar 32 is rotated upward (in the direction of the arrow shown in FIG. 3).

When the movable bar 32 is rotated in this manner, grizzly eyes 33
The height itself is not increased, but it is expanded toward the lower frame 2. Therefore, the rock mass G is the fifth
As shown in Figure (a) and Figure 5 (b), which is a sectional view taken along line B-B, it falls directly or slides downward along the expanded 8-space. Moreover, the movable bar 32.
By repeating the vertical movement of 32..., even extremely strongly clogged rock blocks G will gradually loosen and can be easily removed.

Incidentally, clogging does not necessarily occur only in the center of the grizzly surface 3, but may occur off-centered. Therefore, the loads applied to the jacks 5 and 5 that move the movable bars 32, 32, etc. are not equal, but uneven. There is a possibility that the pivot portions of the movable bars 32, 32, etc. may be destroyed by this uneven load.

Therefore, a control device 6 is provided that automatically adjusts the expansion and contraction of the rods 51.51 of the jacks 5.5 in accordance with the magnitude of the unbalanced load.

This is the jack that drives the movable bar.

The control device automatically adjusts the rod stroke in response to unbalanced loads, thereby extending the mechanical life of the pivot portion of the movable bar. In addition, due to the presence of the impact plate, there is less concentrated damage to the grizzly surface caused by falling rocks, and the dispersion effect allows the material to be thrown to be dispersed in a flat plane, making it possible to increase the efficiency of rough sieving.

As explained above, the grizzly clogging removal device of the present invention has a grizzly surface formed by alternately arranging fixed bars and movable bars between an upper mount and a lower mount, and a pair of jacks. By rotating the tip of the movable bar with the lever, the movable bar can be rotated around the pivot at the rear end to widen the grizzly eye, allowing large clogs to be removed easily and quickly. be done.

Therefore, compared to conventional manual and mechanical removal means, removal can be performed by remote control, which increases safety and reduces the time required for removal, allowing for efficient rough sieving of raw materials on site.

[Brief explanation of the drawing]

Figure 1g1 is an overall perspective view of the grizzly device, Figure 2 is a side sectional view for explaining the arrangement of the fixed part, and Figure 3 is for explaining the arrangement and rotation of the movable part. 4(a) is a partially omitted perspective view illustrating a clogging state; FIG. 4(b) is a sectional view taken along line A-A in FIG. 4(a); FIG. 5(a) is a partially omitted perspective view showing a state in which the movable 8 is rotated to remove a large clogging lump, and FIG. 5(b) is a
It is a sectional view taken along the line BB in FIG. 5(a). 1... Upper mount, 11... Upper surface of the upper mount. 12... Joint beam, 13... Impact plate. 15... Thrust receiving plate, 2... Lower mount. 21...Top surface of lower mount, 3...Grizzly surface. 31. 31... To fixed -, 32, 32... Movable 8 -
133,33...Grizzly eyes, 4...Movable support beam. 5.5... Jack, 51.51... Rod. 6... Control device, 7... Pillow base. Applicant Kumagai Gumi Co., Ltd. Agent Patent Attorney Kuninori Funahashi Figure 1 Figure 2 4 (0) 2 5 (a) (b) Figure (b)

Claims (1)

[Claims] 1. A grizzly surface is formed by alternately arranging fixed bars and movable bars between the upper frame and the lower frame, and by driving the tip of the movable bar via a pair of jacks, the rear Grizzly's clogging removal device is characterized by rotating a movable bar around a pivot at the end. 2. The grizzly clogging removal device according to claim 1, wherein an impact plate is provided on the upper surface of the grizzly surface on the side of the upper mount. 3. The grizzly clog removal device according to claim 1, wherein the pair of jacks can automatically adjust the stroke in accordance with the uneven load applied to the movable bar.