JP2001040693A - Blade construction for excavating work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a blade capable of removing sediment stayed at the rear portion of the blade in a lateral direction at the time of moving back in the grading work by providing a sloped surface on the back surface of the blade front face plate thereby forming a reinforcing member as a sediment lateral guide section. SOLUTION: A rear end portion of a pushing arm 5 is supported by journal in a freely rotatable manner for the lower traveling body of an excavating work machine, and a blade 6 is installed to the other end. The blade front face plate 6 constituting the blade is made to a curved shape and, on the back face, a reinforcing member 9 swelled to an angle shape at the center part is attached by welding or other means and, on the back face 91, a flange 8 for attaching a blade cylinder is jointed. A reinforcing member sloped from one end to other end can be attached to the blade front face plate 6. Also, the plate-shaped member can be bent to a dogleg shape in a plan view thereby forming a triangle pole shape, and a slit for projecting a flange 8 and a pushing arm 5 can be provided. In this way, the sediment can be definitely guided and discharged to the lateral side of the blade during moving back and grading work thereby improving the work efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator having a shovel front attachment and a blade, and more particularly to a blade mounted on a relatively small excavator such as a mini excavator. The present invention relates to a blade configured to remove soil and sand accumulated on the rear surface of the blade to the side of the blade during leveling work during retreat.

[0002]

2. Description of the Related Art In a work site where a relatively small-scale civil engineering work is performed, for example, a road surface excavation or a ditch excavation, it is necessary to reduce labor and efficiency of the work to shorten the construction period. For this reason, further mechanization of these operations is being promoted. Conventionally, as a single-function excavator in this small-scale workplace, for example, hydraulic mini-excavator for excavation of trenches or gutters, and for backfilling and leveling of earth and sand in excavated trenches or gutters A plurality of types of working machines such as bulldozers have been introduced for work, and these working machines are congested with each other in a narrow work place.

[0003] For this reason, in order to use one excavator as a multi-functional excavator, a relatively small excavator such as a mini excavator having a so-called front attachment bucket is mounted. One end of a push arm is attached to the front or rear of the lower traveling body so as to be able to swing up and down, and a blade for backfilling of soil and leveling work is attached to the other end of this arm, and the bucket and the Alternatively, to excavate the gutters and backfill the excavated earth and sand in the excavated trenches, push the earth and sand with blades while moving this small excavator forward, and perform leveling work while moving forward. In addition, the ground excavated while retreating is leveled with blades.

[0004]

However, in a relatively small excavator represented by the above-mentioned conventionally known mini excavator, the excavated earth and sand excavated while moving forward and the leveling operation are performed in a relatively small excavator. Since the blade 6 attached to the lower traveling body has a curved front surface as shown in FIGS. 2 and 3, in leveling work at the time of forward movement, the earth and sand displaced by the curved shape of the blade are: As shown by the solid line in FIG. 3, the blade is steadily entangled in front of the blade, so that it hardly occurs that earth and sand climb over the upper end of the blade and spill on the ground leveled, that is, behind the blade.

However, in leveling work by pulling the blade while retreating, the blade mounted on this relatively small excavator has a high height in relation to other operating structures as shown in FIG. Not too high, and blade 6
Is reinforced by a reinforcing member 7 provided on the rear surface thereof to obtain rigidity. However, since the rear surface of the reinforcing member 7 is flat, the sediment pulled while retreating with the blade is removed from the side of the blade. 3 and gradually rises up in front of the rear surface of the blade, that is, in front of the rear surface of the reinforcing member 7, so that there is no escape place. Finally, as shown by the two-dot chain line in FIG. In some cases, piled-up earth and sand piled up from the rear surface of the blade, climbed over the upper end of the blade, and spilled onto the leveled ground. Therefore, it is necessary to perform the leveling operation again, and extra time is required for the leveling operation.

On the other hand, a large-scale dedicated leveling machine such as a bulldozer or a grader, etc., combines a curved blade for advance and a curved blade for retreat back to back to cope with both forward and backward operations. Although there is a type that made it possible to combine two blades of the same kind in this way, if it is a large and dedicated work machine, the work frequency is high and it is acceptable in terms of cost, but miniature With a relatively small excavator typified by a shovel, leveling work while retreating is not performed so frequently, and in making a curved blade, plate bending work or bending R ( It is very difficult to weld other parts to the place where the (curved surface) is attached, and it is difficult to adopt R (curved surface) as much as possible because it is difficult to add R (curved surface). Arbitrariness.

In view of the above, the present invention has been made in view of the above-mentioned problems, and in a blade mounted on a relatively small excavator, such as a mini excavator, a blade reinforcing member provided on the rear surface of the blade is provided. Formed as earth and sand lateral guide with an inclined surface to discharge earth and sand staying on the back surface of the blade to the side of the blade, or
Attach an earth and sand lateral guide member having an inclined surface capable of discharging soil to the side of the blade by welding directly to the rear surface of the existing blade, or sediment having an inclined surface to the reinforcing member on the rear surface of the existing blade An attachment member for the side guide member is attached, and a sediment side guide member having an inclined surface capable of discharging the soil to the side of the blade is attached to the attachment member. During the leveling work by pulling the blade while retracting due to the inclined surface of the blade, the earth and sand that stays on the back surface of the blade during the leveling work climbs over the upper end of the blade from the back surface of the blade and does not spill on the ground with level ground, The purpose of the present invention is to provide a blade of an excavator which prevents earth and sand accumulated on the rear surface from being discharged to the side of the blade and accumulated on a lower traveling body such as a crawler. It is an.

[0008]

Means for Solving the Problems In order to achieve the above object, the present invention according to claims 1 to 3 of the present invention relates to an excavator equipped with a shovel type front attachment and a blade, wherein the blade is A curved blade front plate, a reinforcing member having a blade lifting hydraulic cylinder mounting flange on the rear surface of the blade front plate and a push arm pivotally supporting the rear end of the traveling body of the excavator, This reinforcing member is characterized in that it forms an earth and sand lateral guide having an inclined surface for discharging earth and sand to the side of the blade.

According to another aspect of the present invention, there is provided an excavating machine having a shovel-based front attachment and a blade, wherein the blade has a curved shape. A blade front plate, a reinforcing member having a hydraulic cylinder mounting flange for lifting and lowering the blade on the rear surface of the blade front plate, and a push arm that pivotally supports the rear end of the traveling body of the excavator, and includes a reinforcing member. An earth and sand lateral guide member having an inclined surface for discharging earth and sand having a slit for projecting a hydraulic cylinder mounting flange for raising and lowering the blade provided on the rear surface of the blade and a pushing arm to the side of the blade. It is characterized by being attached.

In order to achieve the above object, the invention according to claims 7 to 9 of the present invention relates to an excavator equipped with a shovel type front attachment and a blade, wherein the blade has a curved shape. A blade front plate, a hydraulic cylinder mounting flange for lifting and lowering the blade on the rear surface of the blade front plate, and a reinforcing member having a push arm that supports the rear end of the excavator traveling vehicle body, the reinforcing member comprising: A soil / side guide member having a slit for projecting a hydraulic cylinder mounting flange for raising and lowering a blade provided on a rear surface of the blade and a pushing arm, and having an inclined surface for discharging soil to the side of the blade. The mounting member is attached, and the earth and sand lateral guide member is mounted on the mounting member.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of a mini shovel having a shovel-based front attachment and a blade, FIG. 2 is a conventional blade, FIG. 3 is a flow chart of sediment when the conventional blade advances and retreats, and FIG. FIG. 5 is an oblique rear view of the blade according to the first embodiment of the present invention in which the reinforcing member of the blade is a lateral guide portion for earth and sand, FIG. 5 is a plan view of the first embodiment of the present invention, and FIG. It is a flow chart of the earth and sand of the earth and sand side guidance part of a 1st embodiment of the above. FIG. 7 is a flow chart of the sediment of the first deformed sediment lateral guide portion according to the first embodiment of the present invention, and FIG. 8 is a second flow chart of the second embodiment of the first embodiment of the present invention.
FIG. 9 is a flow chart of the sediment of the deformed sediment lateral guide part according to the first embodiment of the present invention.

FIG. 10 is an oblique rear view of a blade according to a second embodiment of the present invention in which a separate earth and sand lateral guide member is attached to the rear surface of the blade by welding, and FIG. 11 is a second embodiment of the present invention. FIG. 12 is a plan view of a third embodiment of the present invention, in which a sediment lateral guide member is mounted by another attachment member of the blade, and FIG. 13 is a partial side cross section of FIG. FIG. 14 and FIG. 14 are oblique rear views of the blade according to the third embodiment of the present invention before a separate earth and sand lateral guide member is attached to the rear surface of the blade by an attachment member, and FIG. 16 is an oblique rear view of the direction guide member, FIG. 16 is a flow diagram of the earth and sand when the first deformed earth and side guide member according to the third embodiment of the present invention is mounted, and FIG. FIG. 18 is a flow chart of earth and sand when the second deformed earth and sand lateral guide member according to the embodiment of the present invention is mounted. It is a flow diagram of sediment when wearing the third third deformed sediment side guide member aspects of the practice of the present invention.

Next, the blade structure of the excavator according to the present invention will be described with reference to FIG. 1 and FIGS. First, a relatively small excavator represented by a mini-excavator having a shovel-based front attachment and a blade will be briefly described with reference to FIG. The lower traveling body of the shovel is an upper revolving body 2 rotatably mounted on the lower traveling body 1. The upper revolving structure 2 includes various powers for operation and operation control devices together with a seat. However, one end of an arm 4 is mounted so as to be swingable in the vertical direction, and a tip of the arm 4 is provided with a bucket 3 for excavation, which is a shovel-based front attachment. A rear end portion of the push arm 5 is rotatably supported by the lower traveling body 1 of the excavator, and is rotatably supported.
At the other end of the push arm 5, a blade 6 for backfilling of soil and leveling work is mounted.

A road surface, a groove or a gutter is excavated by a bucket 3 which is a front attachment mounted on the multifunctional excavator, and then the excavated earth and sand is backfilled in the excavated gutter. The excavated ground is leveled by the blade 6 while moving forward or backward with the blade 6 attached to the lower traveling body 1 of the same excavator.

(1-1) Here, the structure of the blade which is the first embodiment of the excavator according to the present invention will be described with reference to FIGS. 4 to 6. Reference numeral 6 denotes a blade front plate constituting the blade. The front surface has a curved shape like a conventional blade. A reinforcing member 9 whose central rear portion bulges rearward in a mountain shape is attached to the rear surface thereof by means such as welding. A flange 8 for attaching a blade cylinder is joined to a rear surface 91 of the reinforcing member 9 whose central rear portion bulges rearward in a mountain shape.

A bolt hole 81 is formed in the flange 8 for attaching the blade lifting member to a blade lifting member (not shown). The rear surface 91 of the reinforcing member 9 whose central rear portion bulges rearward in a chevron shape has a double open shape in an inverted C-shape slightly forward from the central rear portion toward both ends of the blade in a plan view. ing.

When the excavator is moved forward by the blade configured as described above, the excavated earth and sand is buried in the gutter or the trench excavated by the bucket 3, or when the road surface is leveled, the excavator is moved forward. Since the earth and sand displaced by the curved shape of the blade front plate 6 are entangled more and more in front of the blade, the earth and sand climbs over the upper end of the blade and is leveled on the ground, that is, spills to the rear of the blade. There is no.

Next, in a leveling operation using a blade in which a reinforcing member 9 whose central rear portion bulges rearward in a chevron shape is attached to a push arm 5 of an excavating machine, the blade is pulled while retracting. As described above, the rear surface 91 of the reinforcing member 9 has a double-opened shape in the shape of an inverted C in a slightly forward direction from its central rear portion just in a plan view, as described above. Is pushed to the rear surface 91 of the reinforcing member 9 bulging out. The extruded earth and sand is pushed out to the side along the inclined portion of the rear surface 91 of the reinforcing member 9 bulging in a mountain shape as shown in FIG. Therefore, unlike the conventionally known blades, sediment accumulates on the rear surface of the blade, and the accumulated sediment does not run over the upper end of the blade from the rear surface of the blade and spill on the leveled ground. In addition, since the earth and sand remaining on the rear surface of the blade is guided and discharged to the side of the blade, it does not accumulate between the rear of the blade and a lower traveling body such as a crawler.

(1-2) Modifications of the reinforcing member attached to the back surface of the curved blade front plate 6 will be described with reference to FIGS. In FIG. 7, on the rear surface of the blade front plate 6 having a curved shape, the central rear portion of the reinforcing member 9 is a mountain-shaped rear bulging portion, and the inclined portion of the mountain-shaped rear bulging portion is extended halfway to both ends of the blade. Reinforcing member 9 on the rear side
To form the earth and sand lateral guide portion 92 (see FIG. 7). In the leveling operation by pulling the blade configured as described above while retreating, the pushed-in earth and sand is inclined by the inclined earth and sand lateral guide portion 9 of the rear bulging portion of the reinforcing member 9.
As the soil is ejected to the side of the blade while being pushed out to the side along 2, the earth and sand accumulate on the back surface of the blade, climb over the upper end of the blade from the back surface of the blade, and spill on the leveled ground. Never.

Further, in FIG. 8, a reinforcing member 9 having an inclined surface extending from one end to the other end of the blade is attached to the rear surface of the blade front plate 6 having a curved shape, and the earth and sand lateral guide portion 93 is provided.
Is formed (see FIG. 8). Then, in the leveling operation by pulling the blade configured as described above while retreating, the pushed-in earth and sand is pushed out to the side along the inclined earth and sand side guide portion 93 of the reinforcing member 9. While the blade is guided toward one side of the blade, the earth and sand are not accumulated on the rear surface of the blade, do not climb over the upper end of the blade from the rear surface of the blade, and spill on the leveled ground.

Further, in FIG. 9, the rear surface of the blade front plate 6 having a curved shape has an inclined surface extending from one end of the blade toward the center of the rear surface of the blade. Then, the reinforcing member 9 having a flat surface portion is attached to form the earth and sand lateral guide portion 94 (see FIG. 9). Then, in the leveling operation by pulling the blade configured as described above while retreating, the pushed-in earth and sand is formed along the slope of the earth and sand side guide portion 94 of the reinforcing member 9.
From one side end of the blade, it flows substantially toward the center of the rear surface of the blade, and this flow is directed toward the other end of the blade while being pushed to the side along a flat portion from there toward the other end of the blade. , The earth and sand are not accumulated on the rear surface of the blade, do not climb over the upper end of the blade from the rear surface of the blade, and spill on the leveled ground.

(2-1) Next, FIG. 10 to FIG. 11 show a second embodiment of the excavator according to the present invention, in which a separate earth and sand lateral guide member is attached to an existing blade by welding. explain. FIG. 10 is an oblique rear view of the blade according to the second embodiment of the present invention in which a sediment lateral guide member separate from the blade is attached to the rear surface of the existing blade by welding. The four sides of the triangular prism-shaped earth and sand lateral guide member 10 composed of an upper piece and a lower piece which are bent over the bent upper and lower ends of the two pieces are formed by the existing blade. It is attached to the rear surface by welding or other means. And this triangular prism-shaped earth and sand side guide member 10
The bent two pieces have a flange 8 for mounting a blade cylinder mounted on the rear surface of the reinforcing member of the blade 7 and slits 18, 19, 2 for the push arm to protrude.
A flange 8 for attaching the blade cylinder and a push arm protrude from the slits 18, 19, and 20, so that the flange 8 can be connected to the blade cylinder and the lower traveling body 1 (not shown).

The triangular prism-shaped earth and sand lateral guide member 10 attached to the rear surface of the existing blade by welding is inverted in a slightly forward direction from the center rear portion to the both end portions of the blade in a plan view. The mold has a double-ended shape.
The triangular prism-shaped earth and sand lateral guide member 10 is attached to the rear surface of the existing blade by welding, and the excavating work machine is moved forward by the blade to which the excavated earth and sand are buried in the gutter or the gutter excavated by the bucket 3, or When performing the leveling operation on the road surface, the earth and sand displaced by the curved shape of the blade front plate 6 due to the advancement are gradually caught in front of the blade, so that the earth and sand climb over the upper end of the blade and level the ground. It does not spill on the ground, ie behind the blades.

In the ground leveling operation using the blade configured as described above while retreating, the rear surface of the triangular prism-shaped side guide member 10 is, as described above, just in a plan view. Since it has a two-sided shape in the shape of an inverted C in a slightly forward direction from the center rear part, the earth and sand is pushed in at the bulge-shaped portion at the center rear part, and as shown by the two-dot chain line in FIG. The soil is guided toward the side of the blade while being pushed out to the side along the inclined surface of the soil and lateral guide member 10, so that the soil accumulates on the rear surface of the blade, as in a conventionally known blade. The accumulated sediment does not spill over the top of the blade from the back of the blade and onto the leveled ground. In addition, the earth and sand remaining on the blade rear surface is guided and discharged to the side of the blade,
There is no accumulation between the rear of the blade and the lower traveling body such as the crawler.

(2-2) Next, referring to FIGS. 12 to 18, a separate earth and sand lateral guide member is detachably attached to an existing blade which is a third embodiment of the excavator according to the present invention. The case will be described. In the above (2-1), the example in which the separate earth and sand lateral guide member 10 is attached to the rear surface of the existing blade by welding has been described. However,
Depending on the frequency of leveling work while the excavator is retracted, there is no need to always attach a separate earth and sand side guide member to the rear surface of the blade, and separate earth and sand side guide members as necessary. In some cases, it is better to attach and detach 21. Therefore, as a mounting member for mounting a separate earth and sand lateral guide member 21 on the rear surface of the existing blade, FIG.
As shown by 2 and 13, a required number of nuts and the like are previously mounted on the screw seat 26 on the upper and lower portions of the rear surface of the blade.

On the other hand, a separate earth and sand lateral guide member 21 attached to the rear surface of the blade with a bolt or a pin
Similar to the earth and sand lateral guide member described in 1), the plate-like member is bent into a V-shape in a plan view, and has a C-shape in a plan view, and has an upper side and a lower side. At a position matching the mounting position of the screw seat 26, a mounting flange 27 having a screw hole,
27 are formed. The earth and sand lateral guide member 2
The two bent pieces 1 are provided with slits 18 for mounting a blade cylinder mounted on the rear surface of the reinforcing member of the blade 7, and slits 18, 1, for projecting the flange 8 and the push arm 5.
9, 20 are provided, and the slits 18, 19,
A mounting flange 8 and a push arm protrude from the blade cylinder 20 and can be connected to the blade cylinder and the lower traveling body 1 (not shown).

In order to attach the earth and sand lateral guide member 21 to the back surface of the blade 6, a separate earth and sand lateral guide member 21 is mounted on a screw seat 26 which is previously attached to the upper and lower portions of the rear surface of the blade. The upper side and the lower side are aligned with the screw holes provided on the mounting flanges 27, 27 provided at appropriate places,
The bolts 28 are inserted and fastened to this, and the earth and sand lateral guide member 21 is mounted on the back surface of the blade 6.

In the ground leveling operation using the blade configured as described above while retreating, the rear surface of the side guide member 21 is, as described above, just in a plan view.
Since it has a two-sided shape with an inverted U shape slightly forward from the center rear, the sediment is pushed out at the bulge-shaped portion at the center rear, and the same as shown in FIG. As the soil is guided toward the side of the blade while being pushed out to the side along the inclined surface of the earth and sand lateral guide member 21, the soil accumulates on the rear surface of the blade like a conventionally known blade, and The accumulated sediment does not spill over the top of the blade from the back of the blade and onto the leveled ground. In addition, since the earth and sand remaining on the rear surface of the blade is guided and discharged to the side of the blade, it does not accumulate between the rear of the blade and a lower traveling body such as a crawler.

As a method of mounting the earth and sand lateral guide member 21 on the back surface of the blade 6, in addition to the method of previously mounting the screw seat 26 on the upper and lower portions of the rear surface of the blade as shown in FIG. As shown, a flange 8 for attaching a blade cylinder and a push arm 5 are attached to the rear surface of an existing blade, and a separate earth and sand lateral guide member 21 is provided.
Upper mounting flange 11 and lower mounting flange 1 provided with screw holes 12 as mounting members for mounting
3 are attached. Note that a nut may be fixed to the upper mounting flange 11 instead of the screw hole 12. The lower mounting flange 13 has a pin hole 1.
4 may be formed.

On the other hand, as shown in FIG. 15, the earth and sand lateral guide member 21 attached to the back surface of the blade 6 has a C-shape in a plan view in which a plate-like member is bent in a plan view. The bolt holes 1 of the upper and lower flanges 11 and 13 provided on the back of the blade 6
Bolt holes 15, 15 for bolting to 2 are formed.

The pin 1 engaged with the pin hole 14 formed in the lower mounting flange 13 on the back surface of the blade 6 instead of the bolt hole 12 in the lower piece of the earth and sand lateral guide member 21.
7 may be provided. Then, the two bent pieces of the earth and sand lateral guide member 21 include:
Slits 18, 19, and 20 are provided for the push arm 5 to protrude from the flange 8 for mounting the blade cylinder attached to the rear surface of the reinforcing member of the blade.
A flange 8 for attaching the blade cylinder and a push arm protrude from the slits 18, 19, and 20, so that the flange 8 can be coupled to the blade cylinder (not shown) and the lower traveling body 1.

The earth and sand lateral guide member 21 is attached to the blade by bolt holes 15 and 15 formed in upper and lower pieces of the earth and sand lateral guide member 21 and upper and lower flanges 11 and 13 provided on the back surface of the blade 6. After aligning the positions of the bolt holes with the bolt holes 12, bolts (not shown) are inserted into both holes, and the two are fastened and mounted.

Further, instead of the bolt hole 15 formed in the lower piece of the earth and sand lateral guide member 21, a pin mounting member 16 having a pin 17 provided inside and below the earth and sand lateral guide member 21 is provided.
In this case, the pin 17 mounted on the pin mounting member 16 is engaged with the pin hole 14 of the lower mounting flange 13 mounted on the lower portion of the rear surface of the blade, and the upper portion mounted on the upper surface of the rear surface of the blade. Mounting flange 1
The first screw hole 12 and the bolt hole 15 formed in the upper piece of the earth and sand lateral guide member 21 may be aligned and fastened to both holes by bolts (not shown).

And, as described above, the earth and sand side guide member 21
In the leveling operation while retreating using the blade with the attached, the rear surface of the earth and sand lateral guide member 21 is slightly inverted from the central rear portion slightly forward from the central rear portion as described above. Due to the shape of the double door, the sediment is pushed out at the bulge of this central rear, and FIG.
In the same manner as shown in FIG. 1, the soil is guided toward the side of the blade while being pushed to the side along the inclined surface of the earth and sand side guide member 21, so that, as in a conventionally known blade, Sediment accumulates on the rear surface of the blade, and the accumulated sediment does not run over the upper end of the blade from the rear surface of the blade and spill on the leveled ground. In addition, since the earth and sand remaining on the rear surface of the blade is guided and discharged to the side of the blade, it is not accumulated between the rear of the blade and a lower traveling body such as a crawler.

Further, a modification of the separate earth and sand lateral guide member attached to the rear surface of the existing blade is shown in FIGS.
8 will be described. FIG. 16 shows a modified example in which a separate earth and sand lateral guide member 22 is attached to the center of the rear surface of the existing blade by welding or an attachment member, and FIG. It shows a modified example in which a separate earth and sand lateral guide member 23 having an inclined surface from one end of the blade toward the other end is attached to the rear surface thereof,
FIG. 18 shows a modified example in which a separate earth and sand lateral guide member 24 having an inclined surface extending from one end of the blade toward the center of the rear surface of the blade is attached to the rear surface of the existing blade. is there. Further, in each case, the separate earth and sand lateral guide member has been described as an integral type, but the separate earth and sand lateral guide member may be a split type.

[0036] In either type of modification,
In the ground leveling operation by pulling the blade configured as described above while retreating, the pushed-in earth and sand is separated from the earth and sand lateral guide members 22 and 23 as described with reference to FIGS. ,
As the soil was ejected and guided toward the side of the blade while being pushed out to the side along the inclined surface of 24, earth and sand accumulated on the rear surface of the blade, climbed over the upper end of the blade from the rear surface of the blade, and leveled the ground. Does not spill on the ground.

[0037]

As described above, the blade of the excavator according to the present invention is applied to an excavator equipped with a shovel front attachment and a blade. A relatively small excavation typified by a mini-excavator, in particular, by making the shape of the reinforcing member attached to the rear surface of the equipped blade into a lateral guide portion having a mountain-shaped or single-flow inclined surface in plan view. During leveling work at the time of retreat using the blade mounted on the work machine, the earth and sand that has accumulated on the rear surface of the blade is reliably guided and discharged to the side of the blade by the earth and sand lateral guide portion. Therefore, it can be prevented from spilling over the blade over the ground leveling place, and it is possible to eliminate the troublesome work of ground leveling work when retreating twice as in the conventional work, Work It is possible to improve the efficiency,
It has the effect of

Further, the invention according to claims 4 to 6 of the present invention is directed to a planer-view or single-flow type on the rear surface of an existing blade mounted on an excavator equipped with a shovel-based front attachment and a blade. By mounting the earth and sand lateral guide member having an inclined surface, particularly when leveling work at the time of retreat using a blade mounted on a relatively small excavator represented by a mini excavator, Since the earth and sand staying on the rear surface of the blade is reliably guided and discharged to the side of the blade by the earth and sand lateral guide portion, it is possible to prevent the earth from spilling over the blade and over the leveled ground. As a result, it is possible to omit the troublesome work of leveling work at the time of retreating twice as in the conventional work, so that the working efficiency can be improved.

The present invention according to claims 7 to 9 of the present invention relates to an excavator equipped with a shovel-based front attachment and a blade, wherein a rear surface of an existing blade is provided with a chevron or a single flow in a plan view. The earth and sand side guide member having the inclined surface of the shape can be attached and detached according to the frequency of the leveling operation while the excavator is retracted, so that the excavator is relatively small, especially a mini excavator. During leveling work during retreat using the blade mounted on the excavator, the earth and sand remaining on the rear surface of the blade is reliably guided to the side of the blade by the earth and sand lateral guide. It is possible to prevent spilling over the leveling over the blade, so that it is possible to eliminate the troublesome work of leveling when retreating twice as in the conventional work So work It is possible to improve the efficiency,
In addition, the screw seat for mounting the earth and sand lateral guide member to the rear surface of the blade can be mounted simply by welding a required number of nuts and the like, which is advantageous in that the operation is simple.

[Brief description of the drawings]

FIG. 1 is an overall view of a mini excavator having a shovel-based front attachment and a blade,

FIG. 2 is a blade diagram of a conventional example,

FIG. 3 is a flow chart of sediment when a conventional blade advances and retreats;

FIG. 4 is an oblique rear view of the blade according to the first embodiment of the present invention, in which a reinforcing member of the blade is a lateral guide portion for earth and sand;

FIG. 5 is a plan view of the first embodiment of the present invention,

FIG. 6 is a flow chart of the earth and sand in the earth and sand lateral guide portion according to the first embodiment of the present invention;

FIG. 7 is a sediment flow diagram of a first deformed sediment lateral guide according to the first embodiment of the present invention;

FIG. 8 is a sediment flow diagram of a second deformed sediment lateral guide according to the first embodiment of the present invention;

FIG. 9 is a flow chart of earth and sand in a third modified earth and sand lateral guide according to the first embodiment of the present invention;

FIG. 10 is an oblique rear view of the blade according to the second embodiment of the present invention in which a separate earth and sand lateral guide member is attached to the rear surface of the blade by welding;

FIG. 11 is a plan view of a second embodiment of the present invention,

FIG. 12 is a plan view showing the earth and sand lateral guide member attached by another attachment member of the blade according to the third embodiment of the present invention;

13 is a partial side sectional view of FIG. 12,

FIG. 14 is an oblique rear view of the blade before attaching a separate earth and sand lateral guide;

FIG. 15 is an oblique rear view of a separate earth and sand lateral guide portion,

FIG. 16 is a flow chart of earth and sand when the first deformed earth and sand lateral guide member according to the third embodiment of the present invention is mounted;

FIG. 17 is a flow chart of the earth and sand when the second deformed earth and sand lateral guide member according to the third embodiment of the present invention is mounted;

FIG. 18 is a flow chart of earth and sand when a third deformed earth and sand lateral guide member according to the third embodiment of the present invention is mounted.

[Explanation of symbols]

1 lower traveling structure, 2 upper revolving structure, 3 bucket,
4 boom, 5 push arm, 6 blade front plate,
7 Reinforcement member, 8 Blade cylinder mounting flange, 9 Reinforcement member with rear bulging in a mountain shape, 91 Rear surface of reinforcement member, 10 Sediment lateral guide member, 11 Upper mounting flange, 12 Screw hole, 13 Lower mounting flange, 14 pins Hole, 15 bolt hole, 16 pin mounting member, 17 pin, 18 slit, 19
Slits, 20 slits, 21 detachable earth and sand side guide members that can be attached and detached, 22 earth and sand side guide members provided at the center of the reinforcing member, 23 single-flow type sand and sand side guide members provided over the entire width of the reinforcing member, 24 a half-width one-sided flow type earth and sand lateral guide member of a reinforcing member;
Screw seat, 27 mounting flange, 28 bolt.

Claims (9)

[Claims] An excavator equipped with a shovel-based front attachment and a blade, wherein the blade comprises:
A curved blade front plate, a reinforcing member having a blade lifting hydraulic cylinder mounting flange on the rear surface of the blade front plate, and a push arm that pivotally supports the rear end of the traveling body of the excavator, A blade structure for an excavator, wherein the reinforcing member forms a soil and sand lateral guide having an inclined surface for discharging earth and sand to the side of the blade. 2. The blade structure for an excavator according to claim 1, wherein the earth and sand lateral guide portion having the inclined surface has a mountain shape in plan view. 3. The blade structure for an excavator according to claim 1, wherein the earth and sand lateral guide portion having the inclined surface is of a single-flow type in plan view. 4. An excavator equipped with a shovel-based front attachment and a blade, wherein the blade comprises:
A curved blade front plate, a reinforcing member having a blade lifting hydraulic cylinder mounting flange on the rear surface of the blade front plate, and a push arm that pivotally supports the rear end of the traveling body of the excavator, An earth and sand side plan having an inclined surface for discharging earth to the side of the blade, the reinforcing member having a slit for projecting a hydraulic cylinder mounting flange for raising and lowering the blade provided on the rear surface of the blade and a pressing arm, and projecting to the side of the blade. A blade structure for an excavator, wherein an inner member is attached. 5. The earth and sand lateral guide member having the inclined surface,
The blade structure of an excavator according to claim 4, wherein the blade structure has a mountain shape in plan view. 6. The earth and sand lateral guide member having the inclined surface,
The blade structure of an excavator according to claim 4, wherein the blade structure is of a one-sided flow type in plan view. 7. An excavator equipped with a shovel-based front attachment and a blade, wherein the blade comprises:
It consists of a curved blade front plate, a hydraulic cylinder mounting flange for raising and lowering the blade on the back surface of the blade front plate, and a reinforcing member with a pushing arm mounted on the traveling body of the excavator to support the rear end. The member has a slit for allowing a hydraulic cylinder mounting flange for raising and lowering the blade provided on the rear surface of the blade and a pushing arm to protrude, and an inclined surface for discharging soil to the side of the blade. A blade structure for an excavating machine, wherein a mounting member for a direction guide member is mounted, and a side guide member for earth and sand is mounted on the mounting member. 8. The earth and sand lateral guide member having the inclined surface,
The blade structure of an excavator according to claim 7, wherein the blade structure has a mountain shape in plan view. 9. The earth and sand lateral guide member having the inclined surface,
The blade structure of an excavator according to claim 7, wherein the blade structure is a one-way flow type in plan view.