JP2019060209A - Earth removal device of construction machine - Google Patents

Abstract

To provide an earth removal device of a construction machine which can easily grasp a distance between a curbstone at the sides of a road and a blade, and enhances a working efficiency.SOLUTION: A blade position detection device 30 includes: an arm mounting bracket 31 fixed to a rear face of a blade 24; a rotation arm 33 of which a base end is rotatably mounted onto the arm mounting bracket 31 through a support pin 32 in front and rear directions and a tip extends to a left side end 24L of the blade 24; a spring member 35 which always biases the rotation arm 33 to a direction approaching the rear face of the blade 24; a rotation member 36 formed of a circular roller which is rotatably provided on the tip of the rotation arm 33 around a support shaft 37 extending to upper and lower directions; and a pole 38 which extends upward from the rotation member 36 and rotates together with the rotation member.SELECTED DRAWING: Figure 3

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a soil removing device of a construction machine suitably used to carry out soil removing work such as soil.

  In general, a hydraulic shovel as a construction machine is a self-propelled lower traveling body, an upper revolving body which is rotatably mounted on the lower traveling body and constitutes a vehicle body together with the lower traveling body, and an upper revolving body It is roughly configured by a working device provided so as to be able to raise and lower in the upper and lower directions at the front. Among hydraulic excavators, there is known a truck frame that constitutes a lower traveling body and provided with a soil removing device for soil removal work such as earth and sand. In addition, there is also known a working machine that performs a snow removal operation using a blade (earth removal board) (see, for example, Patent Document 1).

JP 2004-238915 A

  By the way, in the earth removal apparatus by the prior art mentioned above, the pole was fixed and provided in the edge part of the braid | blade (earth removal board), and the operator confirmed the width | variety of the braid | blade by visually recognizing a pole position. However, it is difficult to grasp the distance between the roadside curb and the blade, for example, in the middle of snow removal work or soil removal work only by providing such a pole, and in some cases, the blade may be brought into contact with the curb There is a risk of damaging the curb. In order to prevent this, it has been necessary to place a mark on the curb or in advance. Alternatively, it is necessary to avoid contact by increasing the distance between the curb and the blade in advance.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is, for example, a soil removing device for a construction machine in which the distance between a curb on a roadside and a blade can be easily grasped. It is to provide.

  In order to solve the problems described above, the present invention comprises a blade for soil removal work which is formed of a plate-like body extending left and right and is provided on a vehicle body of a construction machine, and a left end and a right end of the blade. A blade position detecting device provided at at least one of the side ends and detecting whether or not one side end of the blade approaches an obstacle located on the side of the blade; In the soil removing device of a construction machine, the blade position detecting device has a base end pivotally mounted forward and backward with a rear surface side of the blade as a fulcrum, and a tip end is attached to one side end of the blade. A pivoting arm extending toward the end, a spring member biasing the pivoting arm toward the rear surface of the blade, and a pivotable support shaft extending upward and downward from the tip of the pivoting arm Provided, the pivoting arm being the spring portion It is characterized in that it is constituted by a circular rotary member protruding outwardly left and right direction than the position of one side end portion of the blade closest position to the rear surface of the blade by.

  According to the present invention, for example, when the blade is brought close to the curb along the road in the middle of the snow removing operation or the soil removing operation, the rotating member of the blade position detecting device rotates in contact with the curb. This allows the construction machine operator to know that the blade is approaching the curb by looking at the rotating member, and can easily grasp the distance between the curb and the blade.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the hydraulic shovel provided with the earth removal apparatus by embodiment of this invention. It is a top view which expands and shows the lower traveling body and earth removal apparatus in FIG. It is a fragmentary top view which expands and shows the arrow III part in FIG. It is the partial perspective view which saw the blade position detection apparatus provided in the braid | blade of the earth removal apparatus from diagonally back. It is a perspective view which expands and shows a blade position detection apparatus in the state which removed the pole in FIG. It is a perspective view which shows the state which attached the pole to the blade position detection apparatus of FIG.

  Hereinafter, a soil removing device of a hydraulic shovel will be described as an example of a soil removing device of a construction machine according to an embodiment of the present invention, which will be described in detail with reference to FIGS. 1 to 6 of the accompanying drawings.

  In FIG. 1, a hydraulic shovel 1 as a construction machine is a canopy specification shovel. The hydraulic shovel 1 is mounted on a self-propelled crawler lower traveling body 2 and the lower traveling body 2 so as to be able to turn via the turning device 3, and the upper turning which constitutes the vehicle body together with the lower traveling body 2. It is roughly constituted by the body 4, the working device 5 provided swingably and movably on the front side of the upper revolving superstructure 4, and an earth removing device 21 described later provided on the front side of the lower traveling body 2 There is. The lower traveling body 2 and the upper revolving superstructure 4 constitute a vehicle body of a construction machine (hydraulic shovel 1).

  Here, as shown in FIG. 2, the lower traveling body 2 is, for example, a center frame 6A located in the center and formed in a flat box shape, and located on the left and right sides of the center frame 6A in the front and rear directions. The left and right side frames 6B (only the left side is shown in FIG. 1), and the track frame 6 comprising the left and right legs 6C connecting the center frame 6A and the side frames 6B. . In the lower traveling body 2, idle wheels 7 are provided on one end side of each side frame 6 </ b> B, and driving wheels 8 are provided on the other end side. The left and right crawler belts 9 are wound between the idle wheels 7 and the drive wheels 8 respectively.

  Further, a pivoting device 3 is provided on the upper surface side of the center frame 6A of the track frame 6, and a center joint 10 is disposed at the pivoting center. Furthermore, on the front side of the center frame 6A, there is a cylinder bracket 6D located at the center and on which the lifting cylinder 25 of the soil removing device 21 described later is attached and the base end of the arm 22 located on both left and right sides described later. An arm bracket 6E to be attached is provided.

  Further, as shown in FIG. 1, the upper swing body 4 is mounted on the track frame 6 via a swing device 3 and a swing frame 11 mounted on the left side of the swing frame 11 and a driver's seat 12 on which an operator sits. A counterweight 13 mounted on the rear end of the swing frame 11 to balance the weight with the work device 5, and a four-pillar canopy 14 etc. covering the upper part of the driver's seat 12 and the like.

  Next, the earth unloading device 21 of the hydraulic shovel 1 provided on one side in the front and rear directions of the lower traveling body 2 will be described. The soil removing device 21 performs, for example, a soil removing operation, a snow removing operation, and the like while driving and driving the lower traveling body 2. The earth unloading device 21 is configured to include an arm 22, a blade 24, an elevating cylinder 25, an angle cylinder 26, a tilt cylinder 27, and a blade position detection device 30, which will be described later.

  The arm 22 of the earth unloading device 21 is provided to extend in the front and rear directions of the lower traveling body 2. The arms 22 are, as shown in FIG. 2, left and right arm portions 22A and 22B formed as substantially V-shaped frames so as to approach each other toward the front end (tip end), and the respective arms A vertical plate-shaped front plate 22C fixedly provided at the tip of the portions 22A and 22B, and an elevation cylinder bracket 22D provided at an intermediate position of the arms 22A and 22B and to which an elevation cylinder 25 described later is attached An angle cylinder bracket 22E provided on the left side base end of the left arm portion 22A and to which an angle cylinder 26 described later is attached and a front cylinder 22C projecting upward on the upper side of the front plate 22C 27 is roughly configured by a tilt cylinder bracket 22F to which the reference numeral 27 is attached.

  The arm 22 is rotatably connected (pin-connected) to the arm brackets 6E of the lower traveling body 2 (track frame 6) via the pins 23 at the base end sides of the left and right arm portions 22A, 22B. . As a result, the arms 22 of the earth unloading device 21 are moved up and down together with blades 24 and the like described later, centering on the pins 23 of the arm brackets 6E.

  The blade 24 constitutes an earth removing board used for earth removing work. The blade 24 is pivotally attached to the tip of the arm 22 via a universal pin (not shown). The blade 24 is pivoted upward and downward by the arm 22 and can be moved up and down, and can be angled and tilted by the universal pin. The blade 24 is a high strength plate-like body extending in the left and right directions by welding a plurality of steel plates or the like by welding, and has a left end 24L and a right end 24R. Below the front of the blade 24, a cutting edge 24A is provided which has a lower end edge for scraping the ground G flat.

  As shown in FIG. 2, on the rear (rear) side of the blade 24, there is a central bracket 24B located lower in the center and pin-connected to the pin hole (not shown) of the universal pin, A left bracket 24C is provided, to which the angle cylinder 26 is pin-connected, and a right bracket 24D is provided on the upper right and is pin-connected to the tilt cylinder 27.

  The lift cylinder 25 is provided between the track frame 6 of the lower traveling unit 2 and the arm 22. The elevating cylinder 25 is an actuator (cylinder device) that raises and lowers the blade 24 up and down via the arm 22. A protective cover 25A is attached to the elevating cylinder 25 so as to cover the upper side thereof. The elevating cylinder 25 is rotatably mounted between the cylinder bracket 6D of the track frame 6 and the elevating cylinder bracket 22D of the arm 22. The elevating cylinder 25 is connected to a control valve (not shown) on the side of the track frame 6 via a hydraulic hose. The elevating cylinder 25 is reduced and extended by the supply and discharge of pressure oil, and moves the blade 24 up and down together with the arm 22.

  The angle cylinder 26 is provided between the arm 22 and the blade 24. The angle cylinder 26 is an actuator (cylinder device) that makes the blade 24 move in an angle. Further, a protective cover 26A is attached to the angle cylinder 26 so as to cover the upper side. The angle cylinder 26 is disposed on the left side of the free pin as viewed from the operator seated on the driver's seat 12 of the upper swing body 4. The driver's seat 12 is provided on the left side of the upper swing body 4.

  Thereby, the angle cylinder 26 can be easily visually observed from the operator seated at the driver's seat 12. Therefore, it is possible to prevent, for example, a situation where the angle cylinder 26 collides with an obstacle and is damaged at the time of earth removal work. The angle cylinder 26 is connected to the control valve on the track frame 6 side via a hydraulic hose, similarly to the lift cylinder 25. The angle cylinder 26 is expanded and contracted by the supply and discharge of pressure oil, and causes the blade 24 to angle move forward and backward (directions of arrows A and B) about the free pin (the position of the central bracket 24B) It is.

  The tilt cylinder 27 is provided between the arm 22 and the blade 24. The tilt cylinder 27 is an actuator (cylinder device) that tilts the blade 24. The tilt cylinder 27 is also expanded and contracted by supplying and discharging the pressure oil, and tilts the left and right sides of the blade 24 upward and downward. The tilt cylinder 27 is disposed on the right side of the angle cylinder 26 and the free pin, that is, on the right side as viewed from the operator seated on the driver's seat 12. The tilt cylinder 27 is covered by a protective cover 28 attached to the blade 24 on the upper side.

  Thus, by disposing the heavy weight angle cylinder 26 and the tilt cylinder 27 separately to the left and right, it is possible to bring the center of gravity of the earth unloading device 21 closer to the center in the left and right directions. The device 21 can balance the weight in the left and right directions. In addition, the tilt cylinder 27 is located on the opposite side (right side) to the driver's seat 12 on the left side, but is arranged at a higher position than the universal pin. 27 can be easily viewed from above.

  The left end 24L of the blade 24 detects whether the left end 24L of the blade 24 approaches an obstacle 29 (indicated by a two-dot chain line in FIG. 2) located on the left side of the blade 24 A blade position detection device 30 is provided. The blade position detecting device 30 includes an arm mounting bracket 31 fixedly provided on the rear surface of the blade 24, and a rotating arm 33 rotatably mounted on the arm mounting bracket 31 via a fulcrum pin 32. A spring mounting bracket 34, a spring member 35, a disk-shaped rotating member 36 and a pole 38 are included.

  As shown in FIG. 5, the arm mounting bracket 31 of the blade position detecting device 30 is constituted by two rectangular bracket plates 31A and 31B separated in the upper and lower directions. The proximal end sides of the bracket plates 31A and 31B are fixed to the rear surface of the blade 24 by welding, adhesion or the like, and the distal end side protrudes toward the rear of the blade 24. A fulcrum pin 32 configured to include, for example, a bolt 32A and a nut 32B is provided on the protruding end (rear end) side of each bracket plate 31A, 31B, and this fulcrum pin 32 is an upper portion between the bracket plates 31A, 31B. , Is disposed downward.

  The pivoting arm 33 is, for example, a pivoting arm formed by bending a long plate material into a U-shape. As shown in FIG. 3, the pivoting arm 33 is disposed to extend leftward and rightward along the rear surface of the blade 24 along the rear surface. The pivoting arm 33 is rotatably attached, for example, between the bracket plates 31A and 31B of the arm mounting bracket 31 via the fulcrum pin 32 at the end (proximal end) side of the right side. As a result, the pivoting arm 33 is attached so as to be pivotable forward and backward with the rear end side of the blade 24 as a fulcrum. The tip of the U-shaped pivoting arm 33 is a free end and extends toward the left end 24 L of the blade 24.

  The spring mounting bracket 34 is fixed to the rear surface of the blade 24 by welding or bonding at a position closer to the left end 24 L of the blade 24 than the arm mounting bracket 31. The spring mounting bracket 34 constitutes a stopper whose projecting end side which projects rearward of the blade 24 abuts on an intermediate portion in the length direction (left and right direction) of the pivoting arm 33. That is, the pivoting arm 33 pivoting with the fulcrum pin 32 as a fulcrum is at the projecting end (stopper) of the spring mounting bracket 34 at a pivoting position (position closest to the rear surface of the blade 24) shown by solid lines in FIG. It abuts and is positioned.

  The spring mounting bracket 34 has a spring hooking projection 34A projecting upward and downward, and a spring hooking projection 33A similar to this is also provided at the lengthwise intermediate portion of the pivoting arm 33. Between these spring hooks 33A and 34A, both end sides of a spring member 35 made of, for example, a tension spring are provided so as to be hooked. The spring member 35 always biases the pivoting arm 33 toward the rear surface of the blade 24 (ie, the spring hooking protrusion 34A of the spring mounting bracket 34), whereby the pivoting arm 33 is a solid line in FIG. As shown in FIG. 5, the spring mounting bracket 34 is pivoted to a position abutted against the projecting end of the spring mounting bracket 34.

  At the free end side of the U-shaped rotary arm 33, a support shaft 37 for rotatably supporting the rotary member 36 is provided. The support shaft 37 extends upward and downward from the free end (tip end) side of the rotating arm 33, and includes a bolt 37A and a nut 37B. A rotating member 36 is provided rotatably on the support shaft 37 on the upper surface side of the rotating arm 33. The rotating member 36 is configured by a circular roller. Between the rotating member 36 and the support shaft 37, a bearing (not shown) or the like for smoothing the rotation of the rotating member 36 is provided.

  When the pivoting arm 33 is pivoted to the pivoting position shown in solid lines in FIG. 3 (the position closest to the rear surface of the blade 24), the rotating member 36 comprising a roller is one end of the blade 24 It protrudes outward in the left and right directions from the position of the portion (ie, the left end 24L). For this reason, the outer peripheral surface of the rotation member 36 contacts an obstacle 29 (for example, an obstacle 29 such as a curb stone indicated by a two-dot chain line in FIG. 3) located on the left side of the blade 24. Thereby, the pivoting arm 33 is pivoted in the direction of arrow C against the spring member 35 to the position shown by the two-dot chain line in FIG. 3, and the pivoting member 36 is rotated by contact with the obstacle 29. Be done.

  The pole 38 is formed, for example, as an elongated rod extending upward and downward. The lower end side of the pole 38 is fixed to the upper surface side of the rotating member 36 by means of, for example, welding, adhesion, screwing or fitting, and the upper end of the pole 38 exceeds the upper end (height dimension) of the blade 24. It is a free end that extends upward. For example, a pattern 38A such as vertical stripes is applied to the outer peripheral surface of the pole 38, and the pole 38 is rotated integrally with the rotating member 36. The pole 38 does not necessarily have to be provided with the pattern 38A or the like. For example, by providing the pole 38 eccentrically with respect to the rotating member 36, the operator may visually recognize whether the pole 38 is rotating. Also, the pole 38 is formed as a rod-like body made of metal or resin material.

  The earth unloading device 21 of the hydraulic shovel 1 according to the present embodiment has the above-described configuration, and its operation will be described next.

  First, when carrying out a digging operation of earth and sand at the work site, the operator sits on the driver's seat 12 of the upper revolving superstructure 4 and operates various levers, etc. to carry out a traveling operation at the work site, or work The equipment 5 can be raised and lowered to perform earth and sand digging work (including side ditch digging work).

  In addition, when soil removal work or the like is performed using the soil removing device 21, the blade 24 is lowered (rocked) downward via the arm 22 while the elevating cylinder 25 is extended, and the cutting edge 24 A is ground G Ground it. By causing the lower traveling body 2 to travel in this state, soil and the like in the traveling direction can be pushed out by the blade 24, and leveling work at the work site, backfilling work and the like can be performed.

  Furthermore, the earth unloading device 21 performs the angle operation of the blade 24 by the angle cylinder 26 in addition to the earth unloading operation described above, thereby tilting it in the forward and backward directions (directions of arrows A and B in FIG. 2) The soil and the like scraped off by the blade 24 can be discharged to the side of the lower traveling body 2 and can also be used for snow removal work. Further, by tilting the blade 24 by the tilt cylinder 27 and tilting it to the left and right, leveling can be performed at an arbitrary angle regardless of the inclination of the ground G.

  By the way, when carrying out earth removal work (especially, snow removal work) using the earth removal apparatus 21, it is difficult to grasp the distance between the curb on the roadside and the blade 24 while buried in snow, for example, In some cases, the blade 24 may come into contact with the curb to break the curb. In the prior art described in Patent Document 1 described above, the pole is fixedly provided at the end of the blade, and the operator confirms the width of the blade by visually recognizing the pole position. However, providing such a pole is not a sufficient solution, and a new solution has been desired.

  Therefore, in the present embodiment, the blade position detection device 30 is provided at the left end 24L of the blade 24, and the left end 24L of the blade 24 approaches the obstacle 29 located on the left side of the blade 24 or not. Is configured to detect the The blade position detecting device 30 has an arm mounting bracket 31 fixedly provided on the rear surface of the blade 24 and a proximal end thereof mounted on the arm mounting bracket 31 rotatably forward and backward via the fulcrum pin 32. The rotating arm 33 whose tip extends toward the left end 24 L of the blade 24, the spring member 35 which always biases the rotating arm 33 in the direction approaching the rear surface of the blade 24, and the tip of the rotating arm 33 The rotary member 36 is constituted by a circular roller rotatably provided around a support shaft 37 extending upward and downward.

  The rotating member 36 is positioned at one side end (i.e., the left end 24L) of the blade 24 with the pivoting arm 33 biased to a position closest to the rear surface of the blade 24 by the spring member 35. It projects outward more to the left and right. For this reason, the outer peripheral surface of the rotation member 36 contacts an obstacle 29 (for example, an obstacle 29 such as a curb stone indicated by a two-dot chain line in FIG. 3) located on the left side of the blade 24. Thus, the pivoting arm 33 is pivoted in the direction of arrow C against the spring member 35 to the position shown by the two-dot chain line in FIG. 3, and the pivoting member 36 is rotated by contact with the obstacle 29. Be done.

  In addition, on the upper surface side of the rotation member 36, a pole 38 formed as an elongated rod extending upward and downward is provided. The pole 38 is a free end whose upper end extends upward beyond the upper end (height dimension) of the blade 24 and is rotated integrally with the rotating member 36. Moreover, a pattern 38A such as a vertical stripe is applied to the outer peripheral surface of the pole 38, for example, and it is possible to visually recognize from the outside whether the pole 38 is rotated together with the rotating member 36.

  By this configuration, when it is desired to bias the left end 24L of the blade 24 close to an obstacle 29 such as a curb located on the left side of the blade 24, for example, when working with the earth unloading device 21 Are rotated in contact with the curb (obstacle 29) prior to the blade 24. At the same time, the rotary arm 33 on which the rotary member 36 is installed can swing in the direction of the arrow C in FIG. 3 with the fulcrum pin 32 as a fulcrum, so that the curb is not broken.

  In addition, as the rotating member 36 rotates in contact with the obstacle 29, the pole 38 with the pattern 38A is also rotated, so that the operator sitting on the driver's seat 12 can visually recognize the rotation of the pole 38. Whether or not the rotary member 36 contacts the obstacle 29 can be easily visually recognized by the position detection device 30, and earth removal work (especially, snow removal work) can be performed safely without damaging the curbs. .

  Further, the blade position detection device 30 employed in the present embodiment is provided on the rear surface of the blade 24 so as to project rearward and is provided with an arm mounting bracket 31 to which the base end portion of the rotation arm 33 is rotatably attached. And a spring mounting bracket 34 provided to project rearward on the rear surface of the blade 24 at a position closer to one side end (for example, the left end 24L) than the position of the arm mounting bracket 31. . The spring member 35 is constituted by a tension spring provided between the pivot arm 33 and the spring mounting bracket 34.

  As a result, the spring member 35 can be urged to pull the pivoting arm 33 in the direction in which it always approaches the spring mounting bracket 34. The spring mounting bracket 34 uses the spring mounting bracket 34 as a stopper for positioning the pivoting arm 33 at this position, since the pivoting arm 33 abuts on the pivoting arm 33 at a position closest to the rear surface of the blade 24. be able to. Moreover, when the outer peripheral surface of the rotating member 36 (roller) contacts an obstacle 29 such as a curb shown by a two-dot chain line in FIG. 2 and FIG. 3 for example, the rotating arm 33 is rotated in the arrow C direction. Can be permitted by the spring member 35, and the rotary member 36 can be prevented from coming into contact with the obstacle 29 too strongly.

  Therefore, according to the present embodiment, in the hydraulic excavator 1 provided with the blade 24, the position of the blade 24 can be increased by providing the rotatable member 36 and the pole 38 that can rotate and swing at the left end 24 L of the blade 24. It can be easily visually recognized, and the earth removal work can be performed safely without damaging the curbs and the like. Therefore, at the time of earth removing work performed using the earth removing device 21 and snow removing work, the blade position detection device 30 easily grasps the distance between the curb (obstacle 29) beside the road and the left end 24L of the blade 24. Thus, the burden on the operator can be reduced and the work using the blade 24 can be performed efficiently.

  In the above embodiment, the case where the blade position detection device 30 is provided at the left end 24L of the blade 24 has been described as an example. However, the present invention is not limited to this. For example, the blade position detection device may be provided at the right end 24R of the blade 24. Alternatively, the blade position detection device may be provided at both the left end 24L and the right end 24R of the blade 24.

  Further, in the above-described embodiment, the case where the swing arm 33 of the blade position detection device 30 is formed by bending a long plate material into a U-shape is described as an example. However, the present invention is not limited to this. For example, the pivoting arm may be configured as a pivoting arm made of an elongated plate material (one or more plate materials). That is, the pivoting arm may be mounted so that the base end can be pivoted forward and backward with the rear surface side of the blade as a fulcrum, and the tip can extend toward one side end of the blade. .

  Moreover, in the said embodiment, the case where the spring member 35 was comprised by the tension spring was mentioned as the example, and was demonstrated. However, the present invention is not limited to this, and for example, the spring member may be configured by a compression spring. In this case, the spring member may be configured to urge the pivoting arm toward the rear surface of the blade, and for example, the spring member may be compressed at a position opposite to the pivoting member (support shaft) across the pivot of the pivoting arm. It is good also as composition which arranges a spring member which consists of springs.

  On the other hand, in the above embodiment, the angle cylinder 26 is disposed on the left side of the soil removing device 21 and the tilt cylinder 27 is disposed on the right side of the soil removing device 21 as viewed from the operator seated on the driver's seat 12. explained. However, the present invention is not limited to this, and the angle cylinder 26 may be disposed on the right side of the soil removing device 21 and the tilt cylinder 27 may be disposed on the left side of the soil unloading device 21.

  Further, in the above-described embodiment, the case where the earth removing device 21 capable of performing the tilt operation and the angle operation in addition to the vertical movement of the blade 24 is provided to the lower traveling body 2 has been described as an example. However, the present invention is not limited to this. For example, the present invention can also be applied to an earth removing apparatus configured to perform only the upper and lower operations of the blade.

  Moreover, in the said embodiment, the case where the earth removal apparatus 21 was provided in the hydraulic shovel 1 provided with the canopy 14 which covers the upper direction of the driver's seat 12 was mentioned as the example, and was demonstrated. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic shovel provided with a cab box that covers the periphery of the driver's seat 12.

  Furthermore, in the embodiment, the crawler type hydraulic shovel 1 provided with the upper swing body 4 on the lower traveling body 2 as the construction machine has been described as an example, but the present invention is not limited thereto. The present invention can be applied to a hydraulic shovel, and can also be applied to a soil removing device provided to another construction machine (for example, a wheel loader, a bulldozer, etc.) that is not equipped with a revolving super structure.

1 Hydraulic excavator (construction machine)
2 Lower body (body)
4 Upper revolving body (car body)
Reference Signs List 6 track frame 12 driver's seat 21 soil removing device 22 arm 24 blade 25 lifting cylinder 29 obstacle 30 blade position detecting device 31 arm mounting bracket 32 fulcrum pin 33 rotating arm 34 spring mounting bracket 35 spring member 36 rotating member 37 supporting shaft 38 Pole

Claims (4)

A blade for earth removal work which is formed of a plate-like body extending in the left and right directions and provided on a vehicle body of a construction machine,
Whether one side end of the blade approaches an obstacle located on at least one of the left end and the right end of the blade and located on the side of the blade In the earth removal device of a construction machine provided with a blade position detection device for detecting
The blade position detection device is
A pivoting arm whose proximal end is pivotally mounted in a forward and backward direction with the rear surface side of the blade as a fulcrum and whose tip extends toward the one side end of the blade;
A spring member biasing the pivot arm toward the rear surface of the blade;
An end of the pivoting arm is rotatably provided about an upwardly and downwardly extending support shaft, the pivoting arm being closest to the rear face of the blade by the spring member on one side of the blade A soil removing device for a construction machine, comprising: a circular rotating member that protrudes outward in the left and right directions with respect to the position of an end portion. The blade position detection device is
An arm mounting bracket provided on a rear surface of the blade, and a proximal end of the rotating arm is rotatably mounted;
A spring mounting bracket provided on a rear surface of the blade at a position closer to one side end of the blade than a position of the arm mounting bracket;
The soil removing device for a construction machine according to claim 1, wherein the spring member is a tension spring attached to the rotating arm and the spring mounting bracket.   The spring mounting bracket of the blade position detecting device is characterized in that it comprises a stopper for positioning the rotary arm in contact with the rotary arm at a position closest to the rear surface of the blade. The earth equipment of the construction machine according to 2.   The soil removing device for a construction machine according to claim 1, wherein the rotating member of the blade position detecting device is provided with a pole extending upward beyond the height dimension of the blade.

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