JP6934458B2 - Construction machinery - Google Patents

Description

The present invention relates to a construction machine such as a hydraulic excavator equipped with a log grapple capable of gripping wood used in a field such as forestry.

In general, a hydraulic excavator as a typical example of a construction machine includes a self-propelled lower traveling body, an upper rotating body rotatably mounted on the lower traveling body, and a front provided on the front side of the upper rotating body. It is composed of a device. In this case, the lower traveling body and the upper turning body constitute the vehicle body of the hydraulic excavator. The upper swivel body covers a swivel frame forming a support structure, a driver's seat provided on the left side of the swivel frame with the front device interposed therebetween, and an on-board device such as an engine mounted on the swivel frame. It is equipped with a building cover provided on the swivel frame. The front device is provided with a bucket, and the bucket is used for excavation work such as earth and sand.

By the way, the hydraulic excavator is also used in the forestry field by attaching forestry attachments such as a full swing grapple and a processor instead of the bucket of the front device. At this forestry site, long trees are grabbed with forestry attachments and loaded onto transport vehicles (trucks, etc.) and pruned. In this case, if the attachment for forestry is swiveled while grasping a long tree, there is a risk that the tree will come into contact with the hydraulic excavator. Therefore, the operator needs to work carefully so as not to bring the trees into contact with the hydraulic excavator, which may cause tiredness. Therefore, the hydraulic excavator used in the field such as forestry is additionally equipped with a guard member (protective member) on the upper swivel body (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-227742

By the way, the guard member described in Patent Document 1 described above can protect the vehicle body (upper swing body) of the hydraulic excavator. However, the contact between the wood and the guard member may damage the wood as a product.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a construction machine capable of protecting an upper swivel body from wood and also protecting wood.

The construction machine of the present invention comprises a self-propelled lower traveling body, an upper rotating body rotatably mounted on the lower traveling body, and a front device provided on the front side of the upper rotating body. The upper swivel body covers a swivel frame forming a support structure, a driver's seat provided on one side of the swivel frame in the left and right directions with the front device interposed therebetween, and an on-board device mounted on the swivel frame. A building cover provided on the swivel frame is provided, and the front device is rotatably connected to a boom whose base end side is rotatably connected to the swivel frame and to the tip end side of the boom. An arm and a work tool having a grip portion that is rotatably and rotatablely connected to the tip end side of the arm and can grip wood are provided, and the swivel frame includes a center frame extending in the front and rear directions and the center. It has left and right side frames that are arranged on both the left and right sides of the frame and extend in the front and rear directions.

A feature of the present invention is that, of the left and right side frames, the front end side of the side frame on the other side located on the side opposite to the driver's seat is located outside the building cover in the turning direction. A protective member that rises upward and is provided with a polymer material is provided.

According to the present invention, even if the wood comes into contact with the protective member provided on the upper swing body, it is possible to reduce the damage to the wood.

It is a front view which shows the hydraulic excavator provided with the protection member by 1st Embodiment of this invention. It is a top view which shows the state which the wood held by the log grapple is in contact with a protective member. It is a front view which shows the height relationship between the upper surface of the upper swing body and a protective member in an enlarged manner. It is sectional drawing which saw the protection member from the direction of arrow IV-IV in FIG. It is an exploded view which shows the state which the cover member of the protection member was removed from the attachment part provided in the right side frame. It is a perspective view of the hydraulic excavator seen from diagonally above right. It is a front view which shows the protection member by 2nd Embodiment of this invention in an enlarged manner. It is an exploded view which shows the state which the cover member of the protection member was removed from the attachment part provided in the right side frame. FIG. 5 is a cross-sectional view of the protective member as viewed from the direction of arrow IX-IX in FIG. It is the same perspective view as FIG. 6 which shows the protection member by the modification of this invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where the embodiment of the present invention is applied to a hydraulic excavator as a typical example of a construction machine.

1 to 6 show a first embodiment of the present invention. In FIG. 1, the hydraulic excavator 1 is a medium-sized forestry machine used in a forestry field, for example, for forest road construction work, lumber collection work, and the like. This hydraulic excavator 1 enables a self-propelled crawler type lower traveling body 2, an upper rotating body 3 mounted on the lower traveling body 2 so as to be swivel, and an up-and-down operation on the front side of the upper swivel body 3. It is composed of a front device 4 provided. In this case, the lower traveling body 2 and the upper turning body 3 constitute the vehicle body of the hydraulic excavator 1.

The lower traveling body 2 is, for example, a crawler belt 2A formed by attaching a plurality of shoes to a track link formed in an endless shape, and a left and right traveling hydraulic motors for traveling a hydraulic excavator 1 by orbiting the crawler belt 2A. It is equipped with an endless track type traveling device including (not shown).

The front device 4, which is also called a working device, is provided on the front side of the upper swing body 3. The front device 4 rotates and rotates on the boom 4A whose base end side is rotatably connected to the swivel frame 5, the arm 4B rotatably connected to the tip side of the boom 4A, and the tip side of the arm 4B. It is configured to include a log grapple (log fork) 4C as a work tool that is possibly connected, a boom cylinder 4D, an arm cylinder 4E, and a work tool cylinder 4F that drive them.

The log grapple 4C includes a rotating portion 4C1 rotatably pin-coupled to the tip end side of the arm 4B, and a rotating portion 4C2 rotatably attached to the rotating portion 4C1 by a hydraulic actuator (not shown). , A pair of forks 4C3 that can be opened and closed by a hydraulic actuator (not shown) are included. The fork 4C3 constitutes a grip portion capable of gripping the wood W or the like, and the wood or the like can be gripped or opened by opening and closing the forks 4C3.

The upper swivel body 3 is provided on the left side (one side) of the swivel frame 5 in the left and right directions with the front device 4 sandwiched between the swivel frame 5 forming the support structure, and has a driver's seat 6A in which the operator is seated. The cab 6 to be held, the counter weight 7 provided on the rear side of the swivel frame 5 to balance the weight with the front device 4, and the right side (other side) of the swivel frame 5 in the left and right directions across the front device 4. ), A hydraulic oil tank 8 for storing hydraulic oil supplied to a hydraulic actuator such as a boom cylinder 4D, and a fuel tank 9 provided adjacent to the right side of the hydraulic oil tank 8 for storing fuel, etc. It has.

On the front side of the counter weight 7, mounting devices such as an engine, a hydraulic pump, a heat exchanger, and a control valve device (not shown) are mounted on the swivel frame 5. The mounted equipment mounted on the swivel frame 5 is covered with a building cover 10 provided on the swivel frame 5.

The swivel frame 5 has a center frame 5A extending in the front and rear directions, and a left side frame 5B and a right side frame 5C arranged on both the left and right sides of the center frame 5A and extending in the front and rear directions. ..

The left side frame 5B is located below the cab 6 and constitutes a side frame on one side extending in the front and rear directions toward the counterweight 7. On the other hand, the right side frame 5C constitutes a side frame on the other side of the left and right side frames 5B and 5C, which is located on the opposite side in the left and right directions from the cab 6 (driver's seat 6A).

As shown in FIGS. 2 and 6, the right side frame 5C constitutes the front portion of the right side frame 5C and is inclined rearward from the right end of the horizontal frame portion 5C1 extending in the left and right directions and the horizontal frame portion 5C1. It is composed of an inclined frame portion 5C2 extending from the rear end of the inclined frame portion 5C2 and a vertical frame portion 5C3 extending rearward from the rear end of the inclined frame portion 5C2 toward the counterweight 7. The inclined frame portion 5C2 constitutes the front end side of the right side frame 5C, and the inclined frame portion 5C2 is provided with a protective member 12 described later.

A driver's seat 6A in which the operator is seated is provided in the cab 6. A traveling lever / pedal operating device and a working lever operating device (neither of which are shown) for operating the hydraulic excavator 1 are provided around the driver's seat 6A. By operating the traveling lever / pedal operating device and the working lever operating device, the operator operates the traveling operation by the lower traveling body 2, the turning operation of the upper turning body 3, and the gripping operation and rotation of the wood W by the front device 4. It is possible to perform operations and the like.

The hydraulic oil tank 8 is located on the front side of the counterweight 7 and is provided on the swivel frame 5. That is, the hydraulic oil tank 8 is located on the swivel frame 5 on the right side, which is the other side in the left and right directions with the front device 4 in between. The hydraulic oil tank 8 includes hydraulic actuators (driving hydraulic motor, swivel hydraulic motor, boom cylinder 4D, arm cylinder 4E, work tool cylinder 4F, etc.) provided in the lower traveling body 2, the upper swivel body 3, and the front device 4. ) Is stored to drive the hydraulic oil.

The fuel tank 9 is provided on the swivel frame 5 so as to be adjacent to the outer side in the left and right directions of the upper swivel body 3 with respect to the hydraulic oil tank 8. That is, like the hydraulic oil tank 8, the fuel tank 9 is located on the swivel frame 5 on the right side, which is the other side in the left and right directions with the front device 4 in between. The fuel tank 9 stores fuel to be supplied to the engine.

The building cover 10 includes a side plate 10A that rises upward from the vertical frame portion 5C3 of the right side frame 5C, an upper surface plate 10B that covers the upper end of the side plate 10A, and an inclined frame portion of the right side frame 5C from the front end of the upper surface plate 10B. It has a front plate 10C extending toward 5C2. The front end of the side plate 10A is formed by being curved in a convex shape. The front plate 10C is formed by being curved in a convex shape along the front end of the side plate 10A.

Then, as shown in FIGS. 2 and 6, there is a step 11 between the front plate 10C and the boom 4A of the front device 4 between the horizontal frame portion 5C1 of the right side frame 5C and the top plate 10B. Is provided. This step 11 is for the operator to move up and down on the upper swing body 3.

Next, the protective member 12 provided on the right side frame 5C will be described.

The protective member 12 is provided on the inclined frame portion 5C2 which is the front end side of the right side frame 5C located on the opposite side of the left and right side frames 5B and 5C from the cab 6 (driver's seat 6A). By being provided on the inclined frame portion 5C2, the protective member 12 is located outside the side plate 10A of the building cover 10 in the turning direction and rises upward from the inclined frame portion 5C2. That is, the protective member 12 projects from the right side frame 5C toward the outer side in the radial direction of the swivel circle due to the swivel locus of the upper swivel body 3. The protective member 12 includes a cover member 18 made of a polymer material that reduces damage to the wood W when it comes into contact with the wood W. The protective member 12 includes a mounting portion 13, a rod-shaped body 17, and a cover member 18.

The attachment portion 13 of the protective member 12 is provided with an inclined frame portion 5C2 of the right side frame 5C. As shown in FIGS. 3 to 5, the mounting portion 13 includes, for example, a screw seat 14 formed of a metal material and fixed to the inclined frame portion 5C2 by welding or the like, a one-side clamp 15 mounted on the screw seat 14, and the like. It is composed of a side clamp 16. On the front surface of the screw seat 14, four screw holes 14A into which bolts 19 for attaching the one-side clamp 15 and the other-side clamp 16 are screwed are formed.

The one-side clamp 15 and the other-side clamp 16 are formed symmetrically on the left and right sides, and when they are combined, they are formed as a bottomed cylindrical body. That is, the one-side clamp 15 and the other-side clamp 16 are each formed as a half-split member of a bottomed cylindrical body. The one-side clamp 15 and the other-side clamp 16 are attached to the screw seat 14 with the rod-shaped body 17 and the cover member 18 sandwiched therein.

The one-side clamp 15 is made of, for example, a metal material and is attached to the screw seat 14. Of the one-side clamp 15, the support surface 15B located on the side opposite to the contact surface 15A that abuts on the screw seat 14 is formed with a semicircular hole 15C having a semicircular cross section extending upward and downward. There is. The semicircular hole 15C is recessed from the support surface 15B toward the contact surface 15A, the upper end side is opened, and the bottom portion 15C1 is formed on the lower end side. The semicircular hole 15C is formed corresponding to the outer peripheral shape of the cover member 18 described later. Further, the one-side clamp 15 is formed with through holes 15D penetrating from the support surface 15B toward the contact surface 15A at four locations on the outer peripheral side of the semicircular hole 15C. These through holes 15D are formed at positions corresponding to the screw holes 14A of the screw seat 14.

On the other hand, the other side clamp 16 is formed symmetrically to the left and right with the one side clamp 15, sandwiches a rod-shaped body 17 and a cover member 18 described later between the one side clamp 15, and is screwed via the one side clamp 15. It is attached to the seat 14. In the other side clamp 16, a semicircular hole 16A is formed at a position corresponding to the semicircular hole 15C of the one side clamp 15, and a through hole 16B is formed at a position corresponding to the through hole 15D. A bolt 19 for attaching the one-side clamp 15 and the other-side clamp 16 to the screw seat 14 penetrates through the through hole 15D and the through hole 16B.

The rod-shaped body 17 extends upward from the one-side clamp 15 and the other-side clamp 16 of the mounting portion 13. The rod-shaped body 17 is made of, for example, a single round steel made of metal (iron), and serves as a core pillar for reinforcing the cover member 18 described later. The rod-shaped body 17 prevents the wood W from coming into contact with the building cover 10 of the upper swivel body 3.

The cover member 18 covers the outer peripheral side of the rod-shaped body 17. The cover member 18 is formed into an elastic cylindrical shape by, for example, a rubber material as a polymer material. The cover member 18 is fitted into the semicircular hole 15C of the one-side clamp 15 and the semicircular hole 16A of the other-side clamp 16, and the one-side clamp 15 and the other-side clamp 16 are attached to the screw seat 14 by bolts 19. By attaching it, it extends upward from the inclined frame portion 5C2 of the swivel frame 5.

As shown in FIG. 3, the cover member 18 projects upward by ΔH from the upper surface plate 10B of the building cover 10. As a result, for example, as shown in FIG. 2, when the log grapple 4C holding the long wood W is rotated, the wood W is prevented from crossing the cover member 18 and colliding with the building cover 10. be able to.

Even if the wood W collides (contacts) with the cover member 18, the collision force is absorbed by the elastic force of the cover member 18, so that it is possible to reduce the damage to the wood W. Further, a metal rod-shaped body 17 is inserted through the inner peripheral side of the cover member 18. As a result, even when the wood W collides with the cover member 18 with a strong force, the rod-shaped body 17 can suppress the wood W and prevent the wood W from colliding with the building cover 10.

A phosphorescent sticker 18A having issueability is attached to the outer periphery of the cover member 18 on the upper end side. The operator can confirm the position of the cover member 18 from the driver's seat 6A by the phosphorescent sticker 18A even at night when the cover member 18 is difficult to see, for example. As a result, it is possible to reduce the collision of the wood W with the cover member 18 when the log grapple 4C holding the long wood W is rotated during night work. Further, when the upper swing body 3 is swiveled, it is possible to prevent the cover member 18 from coming into contact with an obstacle such as a tree.

The hydraulic excavator 1 according to the first embodiment has the above-described configuration, and its operation will be described next.

The operator seated in the driver's seat 6A in the cab 6 operates the traveling lever / pedal operating device and the working lever operating device to perform the traveling operation by the lower traveling body 2, the turning operation of the upper turning body 3, and the front device. It is possible to perform the operation of accumulating the wood W according to No. 4.

In this case, in the above-mentioned conventional technique, a protective member is provided on the upper swing body in order to prevent wood or the like from coming into contact with the vehicle body (upper swing body) of the hydraulic excavator. Therefore, the vehicle body of the hydraulic excavator is protected by a protective member. However, in this case, there is a risk that the product, such as wood, will be scratched when it collides with the protective cover.

Therefore, in the present embodiment, the protective member 12 is provided on the inclined frame portion 5C2 on the front end side of the right side frame 5C, which is difficult for the operator seated in the driver's seat 6A to check. As shown in FIG. 2, when the rotating portion 4C2 is rotated while the fork 4C3 of the log grapple 4C is holding the long timber W, the timber W approaches the building cover 10. In this case, the operator seated in the driver's seat 6A in the cab 6 must visually recognize the right front side of the upper swivel body 3 through the boom 4A, so that a sense of distance between the wood W and the building cover 10 can be grasped. It is difficult, and there is a risk that the wood W will come into contact with the building cover 10.

Therefore, the protective member 12 is located outside in the turning direction with respect to the side plate 10A rising upward from the right side frame 5C, and extends upward from the inclined frame portion 5C2 with respect to the upper surface plate 10B of the building cover 10. There is. As a result, the wood W comes into contact with the cover member 18 of the protective member 12 before it comes into contact with the building cover 10, so that the collision between the wood W and the building cover 10 can be suppressed.

Further, in the protective member 12, the cover member 18 in contact with the wood W is made of a rubber material as a polymer material. As a result, when the wood W collides with the cover member 18, the collision force is absorbed by the elastic force of the cover member 18. Therefore, the protective member 12 can protect the vehicle body (upper swivel body 3) from the wood W, and can also protect the wood W which is a product.

A phosphorescent seal 18A is provided on the outer periphery of the cover member 18 on the upper end side. As a result, the operator can confirm the position of the cover member 18 even during work such as at night. Further, since the position of the right front end of the upper swing body 3 can be confirmed, it is possible to suppress contact with obstacles around the hydraulic excavator 1 during the swing operation of the upper swing body 3 and the movement of the hydraulic excavator 1. can.

Further, the cover member 18 is attached so as to be sandwiched between the one-side clamp 15 and the other-side clamp 16. Therefore, when the cover member 18 is damaged due to the collision between the wood W and the cover member 18, the cover member 18 is clamped on one side and the other side so that the damaged surface is located on the building cover 10 side. Rotate relative to 16. As a result, the wood W can be protected by easily turning the undamaged surface to the outside (the side with which the wood W comes into contact), so that the life of the cover member 18 can be improved.

Next, FIGS. 7 to 9 show the protective member 21 according to the second embodiment of the present invention. The feature according to the second embodiment is that the cover member 26 of the protective member 21 is made of transparent polycarbonate. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The protective member 21 is provided on the inclined frame portion 5C2 which is the front end side of the right side frame 5C located on the opposite side of the left and right side frames 5B and 5C from the cab 6 (driver's seat 6A). By being provided on the inclined frame portion 5C2, the protective member 21 is located outside the side plate 10A of the building cover 10 in the turning direction and rises upward from the inclined frame portion 5C2. That is, the protective member 21 projects from the right side frame 5C toward the outer side in the radial direction of the swivel circle due to the swivel locus of the upper swivel body 3. The protective member 21 includes a polymer material (cover member 26) that reduces damage to the wood W when it comes into contact with the wood W. The protective member 21 includes a mounting portion 22 and a cover member 26.

The attachment portion 22 of the protective member 21 is provided on the inclined frame portion 5C2 of the right side frame 5C. The mounting portion 22 is formed by the screw seat 14, the one-side clamp 23 and the other-side clamp 24 that are mounted on the screw seat 14, and the rubber clamp 25 that fits on the inner peripheral side of the one-side clamp 23 and the other-side clamp 24. It is configured.

The one-side clamp 23 and the other-side clamp 24 are formed symmetrically on the left and right sides, and are formed as a cylindrical body when both are combined. That is, the one-side clamp 23 and the other-side clamp 24 are each formed as a half-split member of a cylindrical body. The one-side clamp 23 and the other-side clamp 24 are attached to the screw seat 14 with the cover member 26 sandwiched between the rubber clamps 25.

Of the one-side clamp 23, a semicircular hole 23C having a semicircular cross section extending upward and downward is formed on the support surface 23B located on the side opposite to the contact surface 23A that abuts on the screw seat 14. There is. The semicircular hole 23C is recessed from the support surface 23B toward the contact surface 23A, and the upper end side and the lower end side are open. Further, the one-side clamp 23 is formed with through holes 23D penetrating from the support surface 23B toward the contact surface 23A at four locations on the outer peripheral side of the semicircular hole 23C. These through holes 23D are formed at positions corresponding to the screw holes 14A of the screw seat 14.

On the other hand, the other side clamp 24 is formed symmetrically to the left and right with the one side clamp 23, sandwiches the cover member 26 between the one side clamp 23 via the rubber clamp 25, and the screw seat via the one side clamp 23. It is attached to 14. In the other side clamp 24, a semicircular hole 24A is formed at a position corresponding to the semicircular hole 23C of the one side clamp 23, and a through hole 24B is formed at a position corresponding to the through hole 23D. A bolt 19 for attaching the one-side clamp 23 and the other-side clamp 24 to the screw seat 14 penetrates through the through hole 23D and the through hole 24B.

The rubber clamp 25 is provided so as to be fitted into the semicircular hole 23C of the one-side clamp 23 and the semicircular hole 24A of the other-side clamp 24, respectively. These rubber clamps 25 are formed as a tubular body when they are put together. A small diameter portion 26A of the cover member 26 penetrates the inner circumference 25A side of each rubber clamp 25.

The cover member 26 is formed in a cylindrical shape by polycarbonate as a polymer material which is colorless and transparent and has excellent strength, impact resistance, and weather resistance. As shown in FIGS. 7 and 8, the cover member 26 extends upward from the small diameter portion 26A held by the one-side clamp 23 and the other-side clamp 24 via the rubber clamp 25 and the small diameter portion 26A. , A large diameter portion 26B having a larger outer diameter than the small diameter portion 26A is included.

The cover member 26 is formed in a stepped shape by the small diameter portion 26A and the large diameter portion 26B, and the stepped shape allows the cover member 26 to move upward and downward with respect to the one-side clamp 23 and the other-side clamp 24. Is regulated. The upper end of the large diameter portion 26B projects upward from the upper surface plate 10B of the building cover 10. Further, an issueable phosphorescent sticker 26C indicating the position of the cover member 26 is attached to the outer periphery of the large diameter portion 26B on the upper end side.

Thus, the protective member 21 according to the second embodiment configured in this way can also obtain the same actions and effects as those of the first embodiment. In particular, the cover member 26 of the protective member 21 according to the second embodiment is made of colorless and transparent polycarbonate. As a result, the operator seated in the driver's seat 6A in the cab 6 can reduce the obstruction of the view by the cover member 26. Further, since the phosphorescent sticker 26C is attached to the upper end side of the cover member 26, the operator can recognize the position of the cover member 26 even if the cover member 26 is transparent.

When the wood W collides with the cover member 26, the collision force is absorbed by the elastic force of the rubber clamp 25 that supports the cover member 26, so that it is possible to reduce the damage to the wood W. .. Further, when the wood W strongly collides with the cover member 26, it is possible to reduce the possibility that the cover member 26 made of polycarbonate is dented and the wood W is damaged.

As the hydraulic excavator based on the embodiment described above, for example, the one described below can be considered.

The construction machine of the first aspect includes a self-propelled lower traveling body 2, an upper rotating body 3 mounted on the lower traveling body 2 so as to be swivel, and a front provided on the front side of the upper swivel body 3. The upper swivel body 3 is composed of a swivel frame 5 forming a support structure, and a driver's seat 6A provided on one side of the swivel frame 5 in the left and right directions with the front device 4 interposed therebetween. A building cover 10 provided on the swivel frame 5 is provided so as to cover the mounted equipment mounted on the swivel frame 5, and the base end side of the front device 4 is rotatably connected to the swivel frame 5. A grip portion (fork 4C3) that is rotatably connected to the tip side of the boom 4A, an arm 4B connected to the tip side of the boom 4A, and rotatably and rotatably connected to the tip side of the arm 4B to grip the wood W. (Log grapple 4C) is provided, and the swivel frame 5 is arranged on both the left and right sides of the center frame 5A extending in the front and rear directions and the center frame 5A in the front and rear directions. It has left and right side frames 5B and 5C that extend.

Then, on the front end side of the other side frame (for example, the right side frame 5C) located on the side opposite to the driver's seat 6A among the left and right side frames 5B and 5C, the building cover 10 is used. It is characterized in that protective members 12, 21, and 31 are provided, which rise upward at a position outside in the turning direction and are provided with a polymer material.

As a second aspect, in the first aspect, the building cover 10 has a side plate 10A that rises upward from the side frame on the other side, and a top plate 10B that covers the upper end of the side plate 10A. The protective members 12, 21, and 31 are characterized in that they are located outside the side plate 10A of the building cover 10 in the turning direction and project upward.

In the third aspect, in the first aspect, the protective members 12 and 31 have a mounting portion 13 provided on the side frame on the other side and a metal rod shape extending upward from the mounting portion 13. It is characterized in that it is composed of the bodies 17 and 32 and the cover members 18 and 33 that cover the outer peripheral side of the rod-shaped bodies 17 and 32 and have elasticity.

As a fourth aspect, in the first aspect, when the protective members 12, 21, and 31 rotate the work tool in a state where the grip portion of the work tool grips a long wood W. It is characterized in that the wood W is protected by contacting the protective members 12, 21, and 31 before the wood W comes into contact with the building cover 10.

In the first embodiment described above, the case where the cover member 18 of the protective member 12 is raised upward from the inclined frame portion 5C2 of the right side frame 5C has been described as an example. However, the present invention is not limited to this, and as in the modified example shown in FIG. 10, the protective member 31 extends upward from the inclined frame portion 5C2 of the right side frame 5C and rearward along the vertical frame portion 5C3. It may be formed so as to extend. In this case, the protective member 31 is composed of, for example, a plurality of metal rod-shaped bodies 32 and a cover member 33 formed of a rubber material as a polymer material provided on the outer peripheral side of the rod-shaped body 32. .. In addition, a plurality of rod-shaped bodies 32 may be formed of polycarbonate as a polymer material.

Further, in the first embodiment described above, a case where the cover member 18 of the protective member 12 is formed of a rubber material which is one of the polymer materials will be described as an example, and in the second embodiment, the cover member 26 will be used. The case of being formed of polycarbonate, which is one of the polymer materials, has been described as an example. However, the present invention is not limited to this, and for example, the cover member may be formed of another polymer material having excellent strength and impact resistance. This also applies to the modified example.

Further, in the above-described embodiment, the case where the log grapple 4C is used as the working tool of the front device 4 of the hydraulic excavator 1 has been described as an example. However, the present invention is not limited to this, and for example, a processor (harvester) capable of debranching wood or the like may be used as a working tool.

1 Hydraulic excavator (construction machinery)
2 Lower traveling body 3 Upper swivel body 4 Front device 4A Boom 4B Arm 4C Log grapple (working tool)
4C3 fork (grip part)
5 Swivel frame 5A Center frame 5B Left side frame 5C Right side frame 6 Cab 6A Driver's seat 10 Building cover 10A Side plate 10B Top plate 12, 21, 31 Protective member 13 Mounting part 17, 32 Rod-shaped body 18, 26, 33 Cover member W wood

Claims (4)

It is composed of a self-propellable lower traveling body, an upper swivel body rotatably mounted on the lower traveling body, and a front device provided on the front side of the upper swivel body.
The upper swivel body includes a swivel frame forming a support structure, a driver's seat provided on one side of the swivel frame in the left and right directions with the front device interposed therebetween, and an on-board device mounted on the swivel frame. It is provided with a building cover that covers and is provided on the swivel frame.
The front device has a boom whose base end side is rotatably connected to the swivel frame, an arm rotatably connected to the tip end side of the boom, and a rotatable and rotatable arm to the tip end side of the arm. A work tool having a grip that is connected and capable of gripping wood is provided.
The swivel frame is a construction machine having a center frame extending in the front and rear directions and left and right side frames arranged on both left and right sides of the center frame and extending in the front and rear directions.
Of the left and right side frames, the front end side of the side frame on the other side, which is located on the opposite side of the driver's seat, rises upward at a position outside the building cover in the turning direction, and a polymer material is applied. A construction machine characterized by being provided with a protective member provided. The building cover has a side plate that rises upward from the side frame on the other side and a top plate that covers the upper end of the side plate.
The construction machine according to claim 1, wherein the protective member is located outside the side plate of the building cover in the turning direction and projects upward. The protective member is composed of a mounting portion provided on the side frame on the other side, a metal rod-shaped body extending upward from the mounting portion, and a cover member that covers the outer peripheral side of the rod-shaped body and has elasticity. The construction machine according to claim 1, wherein the construction machine is configured. The protective member comes into contact with the protective member before the wood comes into contact with the building cover when the work tool is rotated while the grip portion of the work tool grips a long piece of wood. The construction machine according to claim 1, wherein the wood is protected by the above-mentioned wood.

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