JP2004000987A - Self-propelled crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-propelled crusher which allows an operator to go in and out of the inside of a hopper safely and easily without causing cost increase. <P>SOLUTION: The self-propelled crusher is provided with a frame 10, a lower traveler 9 disposed on the frame 10, a hopper 2 which is disposed on the frame 10 and receives material to be crushed, a roll crusher 3 which is disposed on the frame 10 and crushes the material to be crushed, a conveyer 4 which conveys crushed material crushed by the roll crusher 3 to the outside of the crusher and a protective net 16 which prevents the scattering of the material to be crushed charged into the hopper 2 and is rotatable around a rotation shaft. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a self-propelled crusher for crushing waste such as rocks and construction waste materials, and more particularly to a self-propelled crusher provided with a hopper into which crushed materials are charged.

Self-propelled crushers are used to transport large and small rocks, construction waste, and general waste such as refrigerators and plastics from households (hereinafter appropriately referred to as “gara”) generated at construction sites before transporting them. By crushing to a predetermined size, the construction is facilitated and the cost is reduced.

That is, the waste put into the hopper provided above the self-propelled crusher by a hydraulic shovel or the like is guided to the crushing device below the hopper and crushed to a predetermined size. The crushed gala falls from the crushing device onto the lower conveyor, and is conveyed. Finally, the crushed material is carried out from the front of the self-propelled crusher as a crushed material having a substantially uniform size.

During the crushing operation, for example, if the amount of waste put into the hopper is too large or if the crushing device is not able to crush well, the waste may be clogged between the blades of the crushing device or in the vicinity of the hopper. is there. In such a case, it is general that the operation of the crushing device is stopped, and an operator enters the hopper and performs a work of removing jammed clogs manually. Also, during a normal inspection work, a worker enters the hopper to perform maintenance.
In order to make it easy for such a worker to enter the hopper, a structure in which an openable and closable door is provided on a sloped side wall of the hopper has been conventionally proposed (for example, Patent Document 1).
This self-propelled crusher has an opening formed in the rear side (cab side) of the side wall of the hopper, and a door which can be opened and closed via a hinge is provided in the opening to allow a worker to enter and exit the hopper. Is to make it easier.

JP-A-7-178346 (FIGS. 2 to 4, paragraph 0010)

従 来 The above-mentioned prior art has the following problems.

破 In this type of crusher, a protective net may be provided on the upper part of the rear side wall of the hopper to protect workers in the cab from scattering of waste. In the case where the protection net is provided in the above-mentioned conventional technology, when entering and exiting the hopper from the opening / closing door, the worker is forced to bend down to bend under the protection net. In order to avoid this, a structure in which the opening / closing door is provided on the left or right side wall of the hopper may be considered, but in this case, it is necessary to separately provide a passage from the cab to the opening / closing door beside the hopper. , Which leads to an increase in cost.

目的 An object of the present invention is to provide a crusher that allows an operator to safely and easily enter and exit the hopper without increasing costs.

(1) In order to achieve the above object, a self-propelled crusher of the present invention includes a main body frame, a traveling means provided on the main body frame, a hopper provided on the main body frame for receiving a crushed object, A crushing device provided on the main body frame for crushing the crushed object, a discharge conveyor for conveying the crushed material crushed by the crushing device to the outside of the machine, and preventing scattering of the crushed material input to the hopper. A protective net rotatable about a rotation axis.

As a result, when workers enter and exit the hopper, they can easily get over the protective net in a comfortable posture by rotating the protective net around the rotation axis and reducing its height dimension. it can. In particular, when the protective net is configured to be rotated and folded to provide a step for entering and exiting the worker, the effect is large. At this time, the cost can be reduced as compared with a case where a passage is separately provided beside the hopper.
(2) In the above (1), preferably, detecting means for detecting that the movable part of the protective net is not at the fixed position, and when the detecting means detects that the movable part is not at the fixed position, A controller for stopping the hydraulic motor.

Thereby, when it is detected that the movable part is not at the fixed position, the driving of the crushing device is stopped, and the safety of the worker can be ensured.
(3) In the above (1), preferably, the protective net is a step for allowing a worker to enter and exit the hopper by rotating and folding.

According to the first aspect of the invention, when the worker enters and exits the hopper, the worker can easily get over the protective net in a comfortable posture. Further, the cost can be reduced as compared with the case where a passage is provided beside the hopper.
According to the invention described in claim 2, it is possible to ensure the safety of the worker.

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

FIG. 1 is a side view showing the entire structure of the self-propelled crusher according to the present embodiment, FIG. 2 is a front view seen from the direction A in FIG. 1, and FIG. FIG.

In FIGS. 1 to 3, a self-propelled crusher 1 is a hopper into which waste (rock, not shown) such as rock or construction waste material to be crushed is charged by a working tool such as a bucket of a hydraulic shovel. 2. A rotary crusher (roll crusher) 3 for crushing the input waste into a predetermined size, a conveyor 4 for transporting the waste crushed and reduced by the roll crusher 3 to the front of the crusher 1, and this conveyor 4, a crusher main body 6 provided with a magnetic separator 5 for magnetically attracting and removing magnetic substances contained in the garbage being transported on the conveyor 4 and a left and right crusher provided below the crusher main body 6. And a lower traveling body 9 having right crawler tracks 8L and 8R.

The roll crusher 3 is installed on a frame 10 provided in the crusher main body 6 as a connection portion with the lower traveling body 9, and as shown in FIG. The bodies 11a and 11b are rotated in directions opposite to each other by a driving force generated by a hydraulic motor (not shown) in the drive device 12, and crushing is performed by sandwiching a rattle between the rotating bodies 11a and 11b.
The conveyor 4 drives the belt 4 a by the hydraulic motor 7, thereby transporting the waste falling from the roll crusher 3 onto the belt 4 a to the front side.

The magnetic separator 5 drives the belt 5a, which is disposed above the belt 4a of the conveyor 4 so as to be substantially orthogonal to the belt 4a, around a magnetic force generating means (not shown) by a hydraulic motor 17, thereby providing a magnetic force generating means. The magnetic force is applied to the belt 5a to cause the magnetic substance to be attracted to the belt 5a, and then conveyed in a direction substantially perpendicular to the belt 4a of the conveyor 4 and dropped laterally via the magnetic separator chute 21.

The crawler belts 8L and 8R are respectively stretched between a driving wheel 13 provided on the lower traveling body 9 and an idler 14, and are provided with a driving left / right hydraulic motor (not shown) provided on the driving wheel 13 side. The crusher 1 is caused to travel by the driving force given by the crusher 1).
An operator's cab 15 is provided above the driving device 12, and a protection net 16 for protecting the operator in the cab 15 from scattering of rags is provided in front of the operator's seat 15. Have been. As shown in FIG. 2, the protection net 16 includes three nets, a left net 16a, a center net 16b, and a right net 16c in the traveling direction.

In the above configuration, the hydraulic motors 7, 17 and the like for driving the roll crusher 3, the conveyor 4, and the magnetic separator 5, respectively, are provided with an engine (not shown) in the same manner as a known hydraulic drive for a crusher. It is operated by pressure oil discharged from a hydraulic pump (the same) driven by the. These engine and hydraulic pump are arranged in an engine room 18 at the rear of the frame 10.

During the crushing operation, the waste put into the hopper 2 by a hydraulic shovel or the like is guided to the roll crusher 3 below the hopper 2 and crushed to a predetermined size by the roll-shaped rotating bodies 11a and 11b. It is dropped from the space below the crusher 3 onto the conveyor 4 and transported. Then, during the transportation, the magnetic material (for example, rebar pieces mixed into the concrete waste) mixed in the waste by the magnetic separator 5 is removed. 1 from the front.

要 A main part of the present invention lies in the structure of the hopper 2 and the protective net 16. Hereinafter, the details will be described.

4 (a) shows a top view of the hopper 2, and FIG. 4 (b) shows a cross-sectional view taken along the line IV-IV in FIG. 4 (a). As shown in FIGS. 4A and 4B, the hopper 2 has an upwardly expanding shape including four slopes 2a, 2b, 2c, and 2d, and is located on the inner peripheral side of the rear slope 2c. Are formed with two steps 2c1 and 2c2 for raising and lowering the worker.

FIG. 5 shows a structure near the protective net 16 as viewed from a cross section corresponding to the VV cross section in FIG. 2, FIG. 6 (a) shows an enlarged view of a portion C in FIG. 1, and FIG. FIG. 6A is a top view seen from the direction D in FIG. As shown in FIGS. 5, 6 (a) and 6 (b), the central net portion 16b of the protection net 16 is provided on the lower side, and is fixed to the left net portion 16a and the right net portion 16c on both sides. And a movable portion 16bU provided above the fixed portion 16bL.

As shown in FIG. 5, the movable portion 16bU is connected to the fixed portion 16bL via the hinge 19, and is formed so as to be rotatable around the axis 19a of the hinge 19 and foldable (see a two-dot chain line in FIG. 5). Thereby, at the time of folding, the dimension of the central net portion 16b in the height direction can be reduced. Further, on the hopper 2 side of the movable part 16bU (on the side opposite to the hopper 2 when folded), two steps 20a and 20b for raising and lowering the worker are attached.

Further, as shown in FIGS. 6A and 6B, the frame 16a2 provided on the outer periphery of the net 16a1 of the left net portion 16a prevents the movable portion 16bU from falling down to the hopper 2 side. A stopper 22 and a knob 23 that can be manually fastened and loosened are provided. Corresponding to the knob 23, a locking member 24 is provided on a frame 16bU2 provided on the outer periphery of the net 16bU1 of the movable portion 16bU. The locking fitting 24 is rotatably mounted around the rotating shaft 24 so as to be freely rotatable 360 °, and engages with the shaft 23a of the knob 23 when the movable portion 16bU is at the fixed position, thereby moving the movable portion 16bU. It can be fixed to the left net 16a.

In the present embodiment configured as described above, when the worker enters and exits the hopper 2, the worker manually rotates and folds the movable portion 16bU of the central net portion 16b of the protection net 16, so that the worker can From the floor surface 15a of the cab 15, it is possible to ascend using the steps 20a and 20b of the movable portion 16bU, get over the fixed portion 16bL, and further descend into the hopper 2 using steps 2c1 and 2c2 of the hopper 2. it can. Further, when leaving the hopper 2, it is only necessary to return to the cab 15 by a reverse route and finally return the movable portion 16bU to the fixed position where the movable portion 16bU was rotated.

Thereby, it is possible to easily get over the protection net 16 in a comfortable posture and to enter and exit the hopper 2 safely and easily without slipping the foot inside the hopper 2. The movable portion 16bU is composed of the net 16bU1 and the frame 16bU2, and can be operated manually because it can be made relatively lightweight. Therefore, safety is high because there is no operation of the heavy open / close door as in the prior art, and a damper for opening / closing is not required, so that the cost can be reduced. Further, the cost can be reduced as compared with a case where a passage is separately provided beside the hopper 2.

In the above embodiment, the height of the central net portion 16b is reduced by rotating and folding the movable portion 16bU via the hinge 19, but the invention is not limited to this. For example, the movable portion 16bU may be fixed by sliding the movable portion 16bU downward. The central net portion 16b may be configured to be retractable in the height direction as a structure that can be stored in the portion 16bL. In this case, a similar effect is obtained.

Further, in the above-described embodiment, a buffer means for buffering the operation when the movable portion 16bU is manually folded is not particularly provided. However, as shown in FIG. 7, one is provided on the movable portion 16bU and the other is provided on the right side net. A damper 25 connected to the portion 16c may be provided. In this case, when the worker folds the movable portion 16bU, the sudden movement of the movable portion 16bU due to its own weight is suppressed, so that the physical load on the worker is reduced and the operation can be more easily performed.

In addition, in the above-described embodiment, the detection means for detecting that the movable portion 16bU is not at the fixed position is not particularly provided. However, as shown in FIG. 8, a switch 26 may be provided as this detection means. That is, the switch 26 detects whether or not the locking fitting 24 is engaged with the shaft 23a of the knob 23, and outputs a corresponding signal to a controller (not shown) of the hydraulic drive device of the crusher. It has become. For example, when the latch 24 is engaged, the movable portion 16bU is regarded as being at a fixed position fixed to the fixed portion 16bL, and an OFF signal is output, and when the latch 24 is not engaged. Assuming that the movable portion 16bU is not in the fixed position (that is, in the folded state), it outputs an ON signal. Thus, when the switch 26 outputs the ON signal, the controller stops the hydraulic motor that drives the roll crusher 3, thereby ensuring the safety of the worker.

Further, in the above-described embodiment, the protection net 16 is not attached to the hopper 2 and is provided at the end of the cab 15 on the hopper 2 side. However, the present invention is not limited to this, and as described in JP-A-7-178346. Alternatively, a protective net 16 may be provided at the rear end of the hopper 2. Also in this case, the same effect can be obtained by providing the movable portion 16bU in the central net portion 16b and folding it.

Furthermore, in the above embodiment, the movable portion 16bU is provided only in the central net portion 16b among the left net portion 16a, the central net portion 16b, and the right net portion 16c forming the protective net 6, but the left net portion 16a A movable portion may also be provided on the right side net portion 16c, and these may be configured to be foldable. In this case, the following effects are obtained.

That is, as shown in FIG. 1, the protective net 16 protrudes most upward in the entire crusher 1, and is removed to prevent interference with buildings around the road when transported to the work site. It is often installed after arriving at the site. At this time, since the protective net 16 is relatively large, it must be lifted by a crane or the like, and the mounting work at a high place is not easy.

On the other hand, if the movable portions are provided in all of the central net portion 16b, the left net portion 16a, and the right net portion 16c, all the height dimensions can be reduced. Thus, the protective net 16 can be attached in advance, and the above-mentioned inconvenience can be solved.

In the above embodiment, the steps 20a and 20b and the steps 2c1 and 2c2 provided on the movable section 16bU and the hopper 2 are all two steps. However, the present invention is not limited to this. Accordingly, three or more stages may be used, or only one stage may be used. In this case, a similar effect is obtained.

In the above embodiment, the crusher provided with the roll crusher 3 is described as an example of the crusher, but the crusher is not limited to this. That is, other crushing devices, for example, provided with a cutter on a shaft arranged in parallel, a crushing device (so-called shredder) that shears the object to be crushed by rotating in opposite directions, or moving teeth in front and back with respect to fixed teeth The present invention is also applicable to a crusher provided with a crushing device (a so-called jaw crusher) for crushing looseness by swinging. In this case, a similar effect is obtained.

It is a side view showing the whole structure of the self-propelled crusher by one embodiment of the present invention. FIG. 2 is a front view as viewed from a direction A in FIG. 1. FIG. 2 is a top view as viewed from a direction B in FIG. 1. FIG. 4 is a top view of the hopper shown in FIG. 1 and a cross-sectional view taken along a line IV-IV thereof. FIG. 5 is a cross-sectional view illustrating a structure in the vicinity of a protective net as viewed from a cross section corresponding to a VV cross section in FIG. 2. FIG. 2 is an enlarged view of a portion C in FIG. 1 and a top view of the structure as viewed from a direction D. It is a figure which shows the modification which provided the damper as a buffer means. FIG. 14 is a diagram illustrating a modification in which a switch is provided as a detection unit.

Explanation of reference numerals

1 Self-propelled crusher 2 Hopper 2a-d Slope 2c1, 2 steps (scaffold)
3 Roll crusher (crushing device)
16 Protective net 16b Central net part 16bU Movable part (movable part)
19 Hinge 19a Axis (rotary axis)
20a, b steps (scaffold)
25 Damper (buffer means)
26 switch (detection means)

Claims (3)

A main body frame; a traveling means provided on the main body frame; a hopper provided on the main body frame for receiving the crushed object; a crushing device provided on the main body frame for crushing the crushed object; A discharge conveyor that transports the crushed crushed material outside the machine,
A self-propelled crusher, comprising: a protection net rotatable around a rotation axis for preventing the crushed material to be thrown into the hopper from scattering. The self-propelled crusher according to claim 1,
Detecting means for detecting that the movable part of the protective net is not at a fixed position,
A self-propelled crusher, comprising: a controller that stops the hydraulic motor when the movable portion is not at the fixed position by the detection means. The self-propelled crusher according to claim 1,
The self-propelled crusher according to claim 1, wherein the protective net is a step for allowing a worker to enter and exit the hopper by rotating and folding.

Images