JP2013040496A - Earth removal device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth removal device for a construction machine that includes an auxiliary blade device easily replaceable depending on the content of work, capable of adjusting the position of an auxiliary earth removal plate relative to an earth removal plate, and prevents the run-over of sediment to the rear side of the earth removal plate.SOLUTION: On the upper face of an earth removal plate 9, female screw holes 35 are provided. An auxiliary blade device 30 includes an auxiliary earth removal plate 32, and a fixing member 33 as a part for the auxiliary earth removal plate 32 to be mounted on the earth removal plate 9. The fixing member 33 has two long holes 38 at positions corresponding to the female screw holes 35 for allowing the auxiliary earth removal plate 32 to be mounted after moved in at least longitudinal direction. Bolts are inserted through the long holes 38 of the fixing member 33 and fastened to the female screw holes 35, and then the auxiliary earth removal plate 32 is mounted on the upper face of the earth removal plate 9.

Description

  The present invention relates to a soil removal device for a construction machine that can prevent earth and sand from entering behind a soil discharge plate (blade).

  A construction machine, for example, a wheel-type hydraulic excavator includes a lower traveling body and an upper swinging body provided on the upper part thereof so as to be capable of swinging. A driver's seat and a work attachment are provided in the front part of the upper swing body, and the work attachment has a bucket at its tip. On the other hand, a fuel tank, a hydraulic oil tank, an engine, and the like are mounted on the rear part of the upper swing body.

  Generally, at least one of the front part and the rear part of the lower traveling body is attached with a soil removal device used for leveling work or the like. The earth removing device includes an earth removing plate (blade) extending in the width direction of the lower traveling body, a rotatable parallel link connecting the earth discharging plate and the lower traveling body, and a lower traveling body and the parallel link. It consists of a hydraulic cylinder that connects and rotates the parallel link up and down.

  When working with such a soil removal device, it is necessary to increase the amount of soil removal and to reduce spillage of soil behind the soil discharge plate due to rewinding of the soil to protect devices such as hydraulic cylinders. There is.

  In the invention described in Patent Document 1, an auxiliary blade device is installed at the upper end portion of the earth discharging plate to prevent spillage of earth and sand on the rear surface side of the earth discharging plate. Further, when the auxiliary blade device is not required, the visibility of the foot is secured by storing the auxiliary blade device on the back side of the earth discharging plate with a hydraulic cylinder and a link mechanism.

JP-A-8-13536

  The auxiliary blade device according to the prior art as described in Patent Document 1 has the following problems. That is, the auxiliary blade device is connected to the earth discharging plate by a bracket, a hydraulic cylinder, and a pin, and it is not easy to remove the auxiliary blade device alone. For this reason, a larger auxiliary blade device can be used to secure a large amount of soil during work with a large amount of soil removed, or an auxiliary soil discharge plate for the auxiliary blade device can be used during large work such as transporting glass. It is difficult to exchange the auxiliary blade device such as securing a field of view by using a mesh or punching metal.

  Further, in this auxiliary blade device, since the auxiliary earth removing plate is stored behind the earth removing plate, a step is generated between the earth removing plate and the auxiliary earth removing plate at the time of protrusion. For this reason, earth and sand accumulate in the level difference portion, and there are problems such as ingress of earth and sand from the gap, deterioration of cleanability due to accumulation of earth and sand, and breakage of the auxiliary blade device due to the weight of accumulated earth.

  The problem of the present invention is that it can be easily replaced according to the work content, can adjust the position of the auxiliary soil discharge plate with respect to the soil discharge plate, and has an auxiliary blade device that prevents spillage of earth and sand behind the soil discharge plate, It is to provide a soil removal device for construction machinery.

  In order to achieve the above-described object, a soil removal apparatus for a construction machine according to claim 1 is an upper part of a soil removal plate provided so as to be movable up and down at either the front end portion or the rear end portion of the lower traveling body of the construction machine. In the soil removal apparatus for a construction machine provided with an auxiliary blade device for preventing the earth discharged by the soil discharge board from entering the back surface of the soil discharge board, a female screw hole is formed on the upper surface of the soil discharge board. The auxiliary blade device includes an auxiliary earth removing plate and a fixing member serving as an attachment portion of the auxiliary earth discharging plate to the earth discharging plate, and the fixing member corresponds to the female screw hole. The position is provided with a hole that can be attached at least by moving it in the front-rear direction, and a bolt is inserted into the hole of the fixing member and fastened to the female screw hole, whereby the auxiliary earthing plate is attached to the earthing plate. It is characterized in that it is attached to the upper surface.

  Further, in the soil removal apparatus for a construction machine according to claim 2, at least two of the female screw holes are provided on the upper surface of the soil removal board with a predetermined interval in the front-rear direction, and the fixing member is a base plate. And ribs erected on both left and right ends of the base plate, and the base plate is provided with at least two holes at positions corresponding to the female screw holes.

  According to a third aspect of the present invention, the hole provided in the fixing member is a long hole extending in the front-rear direction.

  According to a fourth aspect of the present invention, the holes provided in the fixing member are arranged in the front-rear and left-right directions with the same interval in the front-rear direction adjacent to the interval between the two female screw holes. A plurality of through holes are provided.

  According to the soil removal device for a construction machine according to the first aspect of the present invention, the auxiliary blade device can be attached to and detached from the soil discharge plate with a bolt, so that the size and shape of the auxiliary soil discharge plate can be easily set according to the work contents. It becomes possible to change to. In addition, the auxiliary earthing plate of the auxiliary blade device can be attached to the upper surface of the earthing plate so that it can move at least in the front-rear direction, so the mounting position of the auxiliary earthing plate with respect to the earthing plate is adjusted according to the soil quality and work. Workability is improved.

  According to a second aspect of the construction machine earth removal device of the present invention, in addition to the first aspect, the two female screw holes provided on the upper surface of the earth removal plate are provided at predetermined intervals in the front-rear direction, and the auxiliary earth removal A fixing member serving as a mounting portion on the upper surface of the earth discharging plate of the plate is provided with a base plate and ribs erected on both left and right ends of the base plate, and the base plate corresponds to the female screw hole. By providing at least two holes in the position, it is possible to prevent the auxiliary earth removing plate from being pushed and rotated by the earth and sand to prevent the earth and sand from entering the gap or the auxiliary earth removing plate from being damaged.

  According to the construction machine earth removal device according to claims 3 and 4, since the hole of the fixing member is constituted by a long hole or a plurality of through holes, the position of the auxiliary earth removal plate can be adjusted with a simple structure. Is possible.

1 is a side view of a wheeled hydraulic excavator as a construction machine according to the present invention. It is a principal part side view of the earth removal apparatus by this invention. It is a perspective view of the earth discharging board of FIG. FIG. 4 is an enlarged plan view in which a part of the top surface of the earth discharging plate in FIG. 3 is enlarged. It is an enlarged plan view corresponding to Drawing 4 in other embodiments.

  A first embodiment of a soil removal apparatus for a construction machine according to the present invention will be described with reference to FIGS. 1 is an overall view of a wheel-type hydraulic excavator provided with a soil removal device according to the present invention, FIG. 2 is a side view of a main part showing the soil removal device, and FIG. 3 is a perspective view showing only a soil removal plate in FIG. FIG. 4 is an enlarged plan view in which a part of the upper surface of the earth discharging plate in FIG. 3 is enlarged. As shown in FIG. 1, a wheel-type hydraulic excavator includes a lower traveling body 1 to which wheels 2 are attached, and an upper revolving body 3 provided on the lower traveling body 1 via a swirling wheel. A driver's cab 4 and a work device 5 are provided in the front, and a machine room 6 and a counterweight 7 are provided in the rear. At the front of the lower traveling body 1, a soil removal device 8 that is operated by an operation lever (not shown) in the cab 4 is provided.

  The earth removal device 8 includes an earth removal plate 9, which has a width approximately the same as the width of the lower traveling body 1 and has a shape recessed toward the front of the lower traveling body 1. The earth removal board 9 and the lower traveling body 1 are connected to each other by a pair of left and right parallel link mechanisms 10. Specifically, each parallel link mechanism 10 includes an upper link 11 and a lower link 12, and connection holes (not shown) are formed at both ends of the links 11 and 12, respectively. Further, an auxiliary blade device 30 to be described later is provided on the top of the earth discharging plate 9.

  On the other hand, a pair of left and right brackets 13 that form a pair with each parallel link mechanism 10 is provided on the front end surface of the lower traveling body 1. Each bracket 13 includes an outer bracket 14 and an inner bracket 15, and the outer bracket 14 and the inner bracket 15 protrude from the front end surface of the lower traveling body 1 toward the earth discharge plate 9. The inner bracket 15 has a plate shape extending in the vertical direction, whereas the outer bracket 14 has a substantially triangular plate shape positioned at the center of the inner bracket 15, and a predetermined interval is provided between the brackets 14 and 15. Is secured.

  In addition, a pair of brackets 16 that form a pair with each parallel link mechanism 10 is also provided on the back surface of the earth discharge plate 9, and these brackets 16 have a plate shape extending in the vertical direction like the inner bracket 15, and the earth discharge The plate 9 protrudes rearward from the back surface.

  Through holes corresponding to the connection holes at the base ends of the upper and lower links 11 and 12 are formed in the center of the outer bracket 14 and the lower end of the inner bracket 15, respectively. Through-holes corresponding to the connection holes at the tip end 12 are formed. Therefore, by aligning the connection holes of the links corresponding to the respective through holes, and inserting the pins 17 into these through holes and the connection holes, the earth removal plate 9 is connected to the lower traveling body via the upper and lower links 11 and 12. 1 is rotatably connected.

  Further, hydraulic cylinders 18 that form a pair with each parallel link mechanism 10 are arranged between the lower traveling body 1 and the earth discharging plate 9. Each hydraulic cylinder 18 is rotatably attached to the upper part of the inner bracket 15 on the side corresponding to the base end of the cylinder outer cylinder via a pin 19. On the other hand, the other end, that is, the tip of the piston rod is rotatably attached to the inner surface of the lower link 12 on the corresponding side via a pin 20.

  Next, the auxiliary blade device 30 will be described. FIG. 4 is an enlarged plan view showing one of fixing members 33 described later in FIG. 3 in an enlarged manner. As shown in FIGS. 3 and 4, the auxiliary blade device 30 described above is formed such that a soil discharge surface portion 31 shaped to be continuous with the front surface of the soil discharge plate 9 extends in the width direction of the soil discharge plate 9. The auxiliary earth removing plate 32 and a plurality of fixing members 33 for fixing the auxiliary earth removing plate 32 to the upper surface of the earth removing plate 9. The auxiliary earth removing plate 32 has a width that is smaller than the entire width of the earth removing plate 9, the earth removing surface portion 31 is inclined at the same angle as the upper end portion of the earth removing plate 9, and is closer to the center of the earth removing plate 9. And the maximum portion is formed to be about 100 mm to 150 mm. A plurality of plate-like screw seats 34 for fixing the fixing member 33 with bolts are provided on the upper surface portion of the earth discharging plate 9 at predetermined intervals in the width direction of the earth discharging plate 9. Are provided with two female screw holes 35 having a predetermined interval in a direction (front-rear direction) orthogonal to the extending direction of the auxiliary earth removing plate 32. FIG. 4 shows a state where the bolt is removed for convenience of explanation. A plurality of fixing members 33 are provided at predetermined intervals in the extending direction of the auxiliary earth removing plate 32 corresponding to the screw seats 34. In FIG. 3, five fixing members 33 are shown. As shown in FIG. 4, the fixing member 33 includes a plate-like base plate 36 that is fixed to the screw seat 34 with bolts, and ribs 37 that are erected on both left and right ends of the base plate 36. One end side of the base plate 36 is fixed to the back surface portion of the auxiliary earth removing plate 32. Further, one end side of the rib 37 is also fixed to the back surface portion of the auxiliary earth removing plate 32. Thereby, the auxiliary earth removal board 32 and the fixing member 33 are firmly fixed. The base plate 36 is provided with long holes 38 extending in the front-rear direction at positions corresponding to the female screw holes 35 of the screw seat 34. Thus, when the fixing member 33 is fixed to the screw seat 34 with a bolt, the fixing member 33 can be moved in the front-rear direction by the length of the long hole 38.

  Since the auxiliary blade device 30 is configured as described above, the auxiliary blade device 30 can be attached to and detached from the earth discharging plate 9 with bolts, and the size and shape of the auxiliary earth discharging plate 32 can be easily changed according to the work content. become. Further, when the auxiliary earth removing plate 32 is attached to the screw seat 34 on the upper surface of the earth removing plate 9, the attachment position can be freely adjusted with respect to the soil quality, use conditions, and manufacturing errors. As a result, the auxiliary blade device 30 can be provided at an appropriate position with respect to the earth discharging plate 9, and the spilling of earth and sand beyond the upper portion of the earth discharging plate 9 can be reduced.

  Further, by fixing the fixing member 33 by the two female screw holes 35 provided in the front-rear direction of the screw seat 34, the auxiliary earth removing plate 32 is not pushed and rotated by the earth and sand, and the auxiliary earth removing plate 32 is also rotated. Therefore, it is possible to prevent the earth and sand from entering and the auxiliary earth removing plate 32 from being damaged.

  Next, a second embodiment will be described with reference to FIG. This embodiment is different from the first embodiment only in the configuration of the fixing member 33, and the other configurations are the same. FIG. 5 corresponds to FIG.

  As shown in FIG. 5, the fixing member 40 includes a plate-like base plate 41 that is fixed to the screw seat 34, and ribs 42 that are erected on both left and right ends of the base plate 41. One end side of the base plate 41 is fixed to the back surface portion of the auxiliary earth removing plate 32. Further, one end side of the rib 42 is also fixed to the back surface portion of the auxiliary earth removing plate 32. Thereby, the auxiliary earth removal board 32 and the fixing member 40 are firmly fixed. The base plate 41 has a through hole having a size corresponding to the diameter of the female screw hole 35 of the screw seat 34 and an interval in the front-rear direction adjacent to each other corresponding to the interval between the two female screw holes 35 of the screw seat 34. Multiple 43 is provided over the front-back direction and the left-right direction. As a result, when the fixing member 40 is fixed to the screw seat 34 with bolts, the mounting position of the auxiliary earthing plate 32 with respect to the earthing plate 9 is changed in the front-rear and left-right directions by changing the through-hole 43 that matches the female screw hole 35. It becomes possible. As a result, when the auxiliary earth removing plate 32 is attached to the screw seat 34 on the upper surface of the earth removing plate 9, its attachment position can be freely adjusted with respect to soil quality, usage conditions, and manufacturing errors, as in the first embodiment. Thus, the auxiliary blade device 30 can be provided at an appropriate position with respect to the earth discharging plate 9, and the spilling of earth and sand beyond the upper portion of the earth discharging plate 9 can be reduced. In particular, in the present embodiment, the mounting position can be changed also in the left-right direction. Therefore, for example, when an operation is performed in which a large amount of earth and sand is collected on one side in the left-right direction, the auxiliary earth removal plate 32 is shifted in that direction. Spilling the earth and sand to the rear of the earth discharge plate 9 can be reduced efficiently.

  In the present embodiment, the example in which the earth removing device 8 is provided in the front portion of the lower traveling body 1 has been described.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Wheel 3 Upper revolving body 4 Driver's cab 5 Working device 6 Machine room 8 Earth removal device 9 Earth removal plate 10 Link mechanism 11 Upper link 12 Lower link 13, 16 Bracket 14 Outer bracket 15 Inner bracket)
17, 19, 20 Pin 18 Hydraulic cylinder 30 Auxiliary blade device 31 Earth removal surface 32 Auxiliary earth removal plate 33, 40 Fixing member 34 Screw seat 35 Female screw hole 36, 41 Base plate 37, 42 Rib 38 Long hole 43 Through hole

Claims (4)

The earth discharged by the earthing plate is made to enter the rear side of the earthing plate at the upper part of the earthing plate that can be moved up and down at either the front end or the rear end of the lower traveling body of the construction machine. In a soil removal device for a construction machine with an auxiliary blade device for preventing,
A female screw hole is provided on the upper surface of the earth removing plate,
The auxiliary blade device includes an auxiliary earth removing plate, and a fixing member serving as a mounting portion of the auxiliary earth removing plate to the earth removing plate,
The fixing member is provided with a hole that can be moved and attached at least in the front-rear direction at a position corresponding to the female screw hole,
A soil removal device for a construction machine, wherein a bolt is inserted into the hole of the fixing member and fastened to the female screw hole to attach the auxiliary soil removal plate to an upper surface of the soil removal plate. The female screw holes are provided on the upper surface of the earth removing plate at a predetermined interval in the front-rear direction,
The fixing member includes a base plate and ribs erected on both left and right ends of the base plate,
The soil removal device for a construction machine according to claim 1, wherein the base plate is provided with at least two holes at positions corresponding to the female screw holes.   The soil removal apparatus for a construction machine according to claim 2, wherein the hole provided in the fixing member is a long hole extending in the front-rear direction.   The said hole provided in the said fixing member consists of a through-hole with which the space | interval of the front-back direction which adjoins is the same space | interval as the space | interval of the said 2 female screw hole, and two or more are provided in the front-back and the left-right direction. The soil removal equipment for construction machinery as described in 1.

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