JP4093464B2 - Jaw crusher and self-propelled crusher equipped with the jaw crusher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a jaw crusher and a self-propelled crusher equipped with the jaw crusher, and more particularly, to a protection mechanism that is provided below a discharge port of the jaw crusher and prevents direct fall of an object to be crushed onto a conveying device.
[0002]
[Prior art]
Conventionally, a conveying device such as a belt conveyor is provided below the discharge port of the crusher. And in order to prevent that a belt conveyor is damaged by the to-be-crushed object discharged | emitted from a discharge port, there exist some which provided the protection mechanism between the discharge port and the belt conveyor. As an example, Patent Document 1 describes a belt protection mechanism of a belt core of an impact crusher, and FIG. 4 is a cross-sectional view of a main part of the belt protection mechanism described in the same document.
[0003]
In FIG. 4, two discharge shatter prevention plates 52, 52 and a belt protection plate 53 are attached to the upper portion of the discharge chute 51 of the impact crusher 50. Thereby, the crushed pieces blown by the rotation of the rotor 54 bounce off as indicated by arrows a, b, and c and do not scatter around. Further, since the shredded pieces that are directed downward collide with the belt protection plate 53 and bounce off as indicated by an arrow d, the belt 21 of the discharge belt conveyor 20 provided below the discharge chute 51 is protected from damage. It is supposed to be protected by the plate 53.
[0004]
However, in this configuration, since the belt protection plate 53 is mounted horizontally, if this conventional technology is applied to the jaw crusher and the belt protection plate 53 is provided below the discharge port of the jaw crusher, the object to be crushed May clog between the jaw crusher discharge port and the belt protection plate 53, or the reinforced concrete rebars may become entangled, thereby hindering the discharge of objects to be crushed, which may hinder the work. Since no patent document information can be found regarding the protection mechanism for the jaw crusher, the following is a description of the prior art that has already been implemented.
[0005]
FIG. 5 is a partial cross-sectional side view of the self-propelled crusher 1 equipped with a jaw crusher provided with a protection mechanism. In FIG. 5, a crawler type traveling body 2 is equipped with a jaw crusher 10, a hopper 3 having a vibration supply device 4 for supplying a material to be crushed to the jaw crusher 10, and a power device 7. The jaw crusher 10 includes a fixed tooth portion 12 attached to a case 11, an eccentric drive shaft 13 rotatably attached to the case 11, and a swing in which the eccentric drive shaft 13 is rotatably attached to a base end portion. Arm 14. The lower back portion of the tip of the swing arm 14 and the gap adjusting mechanism 5 provided in the case 11 are connected via a toggle plate 6. A fixed tooth 15 is attached to the fixed tooth portion 12, and a moving tooth 16 is attached to a portion of the swing arm 14 that faces the fixed tooth 15. Below the discharge port 17 of the jaw crusher 10 is provided a belt conveyor 20 for carrying out a product (object to be crushed with a predetermined particle size), and the belt 21 conveys the product to the swing arm 14 side (arrow direction in the figure). It is supposed to be. Below the discharge port 17 between the discharge port 17 and the belt conveyor 20, a protection device 40 is provided to prevent the object to be crushed from dropping directly onto the belt conveyor 20 and damaging the belt 21. ing.
[0006]
In FIG. 5, the total height H of the self-propelled crusher 1 needs to be equal to or lower than a predetermined height due to, for example, a transport regulation value and a loading property at the time of transportation by a trailer vehicle or the like. On the other hand, a clearance S necessary for work is provided between the discharge port 17 of the jaw crusher 10 and the upper surface of the belt conveyor 20. This state is referred to as a working posture. However, in that case, the height E of the lower surface of the belt conveyor 20 from the ground is lowered, which hinders traveling on rough terrain. Therefore, when the vehicle travels, the rear part (crusher side) of the bell conveyor 20 is lifted by a predetermined height F so as to secure the minimum ground height G necessary for travel by setting the position to the broken line in the figure. This state is called a running posture.
[0007]
FIG. 6 is a detailed view of the protection device 40. Here, the same members as those in FIG. 5 are denoted by the same reference numerals, description thereof is omitted, and only different portions will be described. In FIG. 6, a protection device 40 is attached to the lower surface portion of the fixed tooth portion 12 below the discharge port 17 of the jaw crusher 10, and the surface 41 of the protection device 40 is in the conveying direction (not shown) of the belt 21 of the belt conveyor 20. It is inclined downward toward the white arrow.
[0008]
Next, the operation will be described. In FIG. 5, the object to be crushed put into the hopper 3 is put into the jaw crusher 10 by the vibration supply device 4. The object to be crushed is crushed by the fixed teeth 15 and the moving teeth 16 of the swing arm 14 that is oscillated by the eccentric drive shaft 13 that is rotationally driven, and falls onto the belt 21 of the belt conveyor 20 from the discharge port 17. At that time, as shown in FIG. 6, the fallen object collides with the inclined surface 41 of the protection device 40, changes direction in the direction of the arrow, and falls on the belt 21. Therefore, the object to be crushed falls in the direction of conveyance of the belt 21 (white arrow) and is smoothly conveyed. Further, when it falls, it collides with the protective device 40 and changes its direction, so that the impact is mitigated and the belt 21 is not damaged. Further, the direction of the fall of the reinforced concrete reinforcing bars and the like is changed by the protective device 40, and there is no possibility that the belt 21 pierces the belt 21 perpendicularly together with the conveying direction of the belt 21 (white arrow).
[0009]
[Patent Document 1]
JP-A-9-141123 (page 3, FIG. 1)
[0010]
[Problems to be solved by the invention]
However, the above configuration has the following problems. FIG. 7 is a CC arrow view of FIG. In FIG. 7, the right side of the center line XX shows the case where the belt conveyor 20 is in the working posture and the left side is in the traveling posture. Guide plates 22 for preventing spillage of the conveyed material on the belt 21 are provided on both outer sides in the width direction (left and right in the drawing) of the belt conveyor 20, and a rubber guide belt 23 is attached to the guide plate 22. The lower end portion thereof is in contact with the belt 21. Rubber plates 24 are attached to the left and right lower portions of the case 11, and the tip portions thereof are in contact with the guide belt 23 to prevent the object to be crushed discharged from the discharge port 17 from scattering outside the conveyor. . As shown on the left side of the figure, when the belt conveyor 20 is raised to the running posture, the width N of the protection device 40 is set to the discharge port in order to avoid interference between the rubber plate 24 pushed up by the guide plate 22 and the protection device 40. It is much smaller than the width W of 17.
[0011]
FIG. 8 is a view taken in the direction of arrow D in FIG. As described above, the width N of the protection device 40 is significantly smaller than the width W of the discharge port 17. Therefore, in FIG. 8, the both ends of the discharge port 17 are large and penetrate in the vertical direction surrounded by the inner surface of the case 11, the fixed teeth 15, the moving teeth 16, and the left and right outer surfaces of the protection device 40. The gaps 42 and 42 (the hatched portions shown in the figure) are formed. For this reason, for example, crushed reinforced concrete reinforcing bars or the like may fall directly onto the upper surface of the belt 21 from the gaps 42 and 42, and the belt 21 may be damaged.
[0012]
The present invention has been made paying attention to the above-mentioned problems, and can reliably prevent the object to be crushed from falling directly on the conveying device, and can raise the conveying device to the vicinity of the lower surface of the fixed tooth portion. It is an object of the present invention to provide a jaw crusher having a protection mechanism and a self-propelled crusher equipped with the jaw crusher.
[0013]
[Means, actions and effects for solving the problems]
In order to achieve the above object, in the first invention, a jaw crusher includes a case, a fixed tooth portion provided with a fixed tooth, and an eccentric drive shaft that is rotatably supported by the case. A moving tooth portion that is driven to swing through a swing arm to which an eccentric drive shaft is rotatably attached, a discharge port provided between the fixed tooth and the lower end portion of the moving tooth, and below the discharge port And a belt conveyor that can move up and down, and a protective mechanism that collides with the object to be crushed when falling is provided below the fixed tooth portion so as to freely move up and down, so that the protective mechanism moves up and down as the belt conveyor moves up and down. The configuration is as follows.
[0014]
According to the first aspect of the present invention, a protection mechanism is provided that moves up and down as the belt conveyor moves up and down. Therefore, it can prevent that a to-be-crushed object falls directly on conveyance apparatuses, such as a belt conveyor , and can prevent damage to a conveyance apparatus. In addition, when a protective mechanism is fixed as in the prior art, the protection mechanism is used to prevent interference between both ends of the protective mechanism and the conveyor device such as the belt conveyor when the conveyor device such as the belt conveyor is raised. It is necessary to make the width of the mechanism narrower than the width of the outlet. However, in the present invention, since the protection mechanism can swing in the vertical direction, it is not necessary to narrow the width of the protection mechanism, and the protection mechanism can be provided over the entire width of the discharge port of the jaw crusher. For this reason, for example, crushed reinforced concrete reinforcing bars or the like do not fall directly onto the conveying device from both ends of the discharge port, and damage to the conveying device can be prevented .
[0015]
According to a second invention, in the first invention, the width of the protection mechanism is the same as the width of the discharge port .
[0016]
According to the second invention, the protection mechanism is provided over the entire width of the outlet of the jaw crusher. For this reason, for example, crushed reinforced concrete reinforcing bars or the like do not fall directly onto the conveying device from both ends of the discharge port, and damage to the conveying device can be prevented.
[0017]
A third invention is a self-propelled crusher, in a vehicle, a case, a fixed tooth portion provided on the case, to which fixed teeth are attached, an eccentric drive shaft rotatably supported by the case, and an eccentric drive shaft A jaw crusher having a moving tooth portion that is driven to swing through a swing arm that is rotatably mounted, and a discharge port provided between a fixed tooth and a lower end portion of the moving tooth, and a belt conveyor vertically movable below the outlet, below the fixed teeth, a protective mechanism which the crushed collides when dropped, provided vertically movable, the protection mechanism, the upper and lower belt conveyors It is configured to move up and down as it moves .
[0018]
According to the third aspect of the invention, the protection mechanism is configured to move up and down as the belt conveyor moves up and down , below the fixed tooth portion of the jaw crusher mounted on the vehicle, that is, below the discharge port between the fixed tooth and the moving tooth. Is provided. Therefore, it is not necessary to narrow the width of the protection mechanism in order to prevent interference between the both ends of the protection mechanism and the conveyance device when the conveyance device is raised, and the protection mechanism is provided over the entire width of the jaw crusher discharge port. be able to. Therefore, for example, a crushed reinforced concrete rebar or the like does not fall directly on a conveyor such as a belt conveyor from both ends of the discharge port, and a self-propelled crusher that can prevent the conveyor from being damaged can be obtained. Furthermore, since the conveying device can be raised to the vicinity of the jaw crusher, the ground height is increased, the rough terrain traveling property is improved, and the overall vehicle height can be lowered, so that the transportability and the loading property are improved.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a jaw crusher according to the present invention and a self-propelled crusher equipped with the jaw crusher will be described in detail with reference to the drawings.
[0020]
FIG. 1 is a side view of the protection mechanism 30. The configuration of the jaw crusher 10 is the same as the conventional one described in FIG. In FIG. 1, a fixed tooth 15 is attached to the fixed tooth portion 12 of the jaw crusher 10, and a moving tooth 16 is attached to a swing arm 14 that is provided so as to be swingable facing the fixed tooth 15. A discharge port 17 is formed at the lower end between the fixed tooth 15 and the moving tooth 16, and a protection mechanism 30 is provided below the discharge port 17. The protection mechanism 30 includes a bracket 31 that is fastened to the lower surface of the fixed tooth portion 12 with a bolt 32, and a protection plate 34 that is swingably attached to the bracket 31 with a pin 33. That is, the protection plate 34 can swing as indicated by a two-dot chain line. The protection plate 34 is inclined downward toward the transport direction (white arrow) of the belt 21 of the belt conveyor 20 at the lowest position (indicated by a solid line). Buffer members 35 are provided at both left and right ends of the lower surface of the protection plate 34. The buffer member 35 is constituted by a plastic roller in this example. A belt 21 shown by a solid line in FIG. 1 shows a working posture of the belt conveyor 20, and a two-dot chain line shows a running posture.
[0021]
FIG. 2 is an AA arrow view of FIG. In FIG. 2, the right side of the center line XX shows the case where the belt conveyor 20 is in the working posture and the left side is in the traveling posture. Guide plates 22 for preventing spillage of the conveyed material on the belt 21 are provided on the left and right outer portions of the belt conveyor 20, and a rubber guide belt 23 is attached to the tip of the guide plate 22. Is in contact with Rubber plates 24 are attached to the left and right lower portions of the case 11, and their tip portions are in contact with the guide belt 23 to prevent the object to be crushed discharged from the discharge port 17 from being scattered outside. As shown on the left side of the figure, when the belt conveyor 20 is raised to the running position, the rubber plate 24 pushed up by the guide plate 22 abuts against the buffer member 35 and the protection plate 34 is moved upward with the pin 33 as the center. Rock.
[0022]
3 is a view taken in the direction of arrow B in FIG. When the belt conveyor 20 is raised as described above, the protective plate 34 swings upward, so that it is not necessary to make the width of the protective plate 34 smaller than the width W of the discharge port as in the prior art. That is, in FIG. 3, since the width M of the protection plate 34 is substantially the same as the width W of the discharge port 17, the inner surface of the case 11, the fixed teeth 15, the moving teeth 16, and the left and right outer surfaces of the protection plate 34. The gaps 36 and 36 (hatched portions shown in the figure) penetrating in the vertical direction surrounded by can be made extremely small.
[0023]
In addition, you may mount the jaw crusher 10 which has the above-mentioned protection mechanism 30 in a self-propelled crusher. The self-propelled crusher in which the jaw crusher 10 is mounted on the vehicle is the same except that the protection device 40 and the protection mechanism 30 are different in FIG.
[0024]
The jaw crusher according to the present invention and the self-propelled crusher equipped with the jaw crusher are configured as described above. For this reason, in FIG. 1, the fallen object collides with the inclined protection plate 34, changes its direction in the direction of the arrow shown, and falls on the belt 21. Accordingly, the object to be crushed falls in the direction of conveyance of the belt 21 (white arrow) and is smoothly conveyed. Further, the impact of the drop is alleviated and the belt 21 is not damaged. Further, the crushed reinforced concrete rebar or the like does not fall directly onto the belt 21 from the gap as in the prior art, and the fallen direction of the belt 21 that has fallen from the discharge port is changed by the protective plate 34, and the traveling direction of the belt 21. In combination with (white arrow), there is no fear of piercing the belt 21. That is, a jaw crusher and a self-propelled crusher equipped with the jaw crusher can be obtained in which the object to be crushed is smoothly conveyed and the belt is not damaged.
[0025]
Further, as the belt conveyor 20 is raised, the protective plate 34 is swingable in the vertical direction, so that the belt conveyor 20 can be raised to the vicinity of the lower portion of the jaw crusher 10 and the ground height in the running posture is increased. Since the height can be increased, the rough terrain traveling performance is improved, and at the same time, the overall height of the vehicle can be lowered while securing a predetermined distance between the jaw crusher 10 and the belt conveyor 20, so that the transportability and the loading performance are improved.
[0026]
In the present invention, the protective plate 34 is configured to be swingable, but may be configured to be retractable, for example, retractable to the fixed tooth portion 12 side, or vertically movable, to be vertically movable. The buffer member 35 is made of a plastic roller. However, the buffer member 35 is not limited to this, and may be a member that can be buffered when the belt conveyor 20 is raised. For example, an elastic member such as rubber may be interposed.
[Brief description of the drawings]
FIG. 1 is a side view of a protection mechanism of the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is a view taken in the direction of arrow B in FIG. 1;
FIG. 4 is a side sectional view showing a configuration of a belt protection mechanism of a conventional impact crusher.
FIG. 5 is a partial cross-sectional side view of a self-propelled crusher equipped with a jaw crusher equipped with a conventional belt protection device.
FIG. 6 is a side view of a conventional belt protection device.
7 is a view taken along the line CC in FIG. 6;
FIG. 8 is a view taken in the direction of arrow D in FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Self-propelled crusher, 10 ... Jaw crusher, 11 ... Case, 12 ... Fixed tooth part, 14 ... Swing arm, 15 ... Fixed tooth, 16 ... Moving tooth, 17 ... Discharge port, 20 ... Belt conveyor, 21 ... Belt, 30 ... protection mechanism, 31 ... bracket, 33 ... pin, 34 ... protection plate, 35 ... buffer member.

Claims (3)

In the jaw crusher
Case (11),
A fixed tooth portion (12) provided with a fixed tooth (15) provided on the case (11);
An eccentric drive shaft (13) rotatably supported by the case (11);
A moving tooth (16) portion driven to swing through a swing arm (14) to which an eccentric drive shaft (13) is rotatably attached;
A discharge port (17) provided between the lower ends of the fixed tooth (15) and the moving tooth ( 16) ;
And a vertically movable belt conveyor (20) below the outlet (17),
Below the fixed teeth (12), a protective mechanism for the crush material collide when dropped (30), provided vertically movable,
A jaw crusher characterized in that the protection mechanism (30) moves up and down as the belt conveyor (20) moves up and down . The jaw crusher according to claim 1, wherein
A jaw crusher characterized in that the width (N ) of the protection mechanism (30) is the same as the width (W) of the discharge port (17) . In self-propelled crusher,
In the vehicle, the case (11),
A fixed tooth portion (12) provided with a fixed tooth (15) provided on the case (11);
An eccentric drive shaft (13) rotatably supported by the case (11);
Equipped with a jaw crusher (10) having a moving tooth (16) portion that is driven to swing through a swing arm (14) to which an eccentric drive shaft (13) is rotatably attached,
A discharge port (17) provided between the lower ends of the fixed tooth (15) and the moving tooth ( 16) ;
And a vertically movable belt conveyor (20) below the outlet (17),
Below the fixed teeth (12), a protective mechanism for the crush material collide when dropped (30), provided vertically movable,
The self-propelled crusher characterized in that the protection mechanism (30) moves up and down as the belt conveyor (20) moves up and down .

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