JP2006214160A - Wheel-mounted construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide wheel-mounted construction machinery which can easily switch between an operating attitude and a traveling attitude, and which can reduce the amount of overhang of an attachment during movement. <P>SOLUTION: This wheel-mounted construction machinery has the attachment which is equipped with a boom elongated in the forward direction of an operator's cab and wherein an arm is attached to the boom. In the wheel-mounted construction machinery, the boom or the arm is split into a bottom side and a top side in an intermediate position; the top-side boom or the top-side arm is attached in such a manner as to be turnable at an angle of approximate 180° in a horizontal and lateral direction with respect the bottom-side boom or the bottom-side arm; and the top-side boom or the top-side arm is folded with respect to the bottom-side boom or the bottom-side arm. Thus, the wheel-mounted construction machinery can travel on a general public road. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wheel-type construction machine, and more particularly to a wheel-type construction machine having a boom that extends toward the front of a driver's cab, and having an attachment with an arm attached to the boom.

  5 and 6 show an example of a conventional wheel-type construction machine. The wheel type construction machine shown in FIGS. 5 and 6 is a wheel type material handling machine. The wheel type material handling machine 11 includes a lower traveling body 13 having driving wheels 12 and 12 and an upper revolving body 15 that is mounted on the lower traveling body 13 via a turning mechanism 14 so as to be rotatable. .

  The upper swing body 15 is provided with a driver's cab 16 on the front side near the left side, and an attachment 17 that can swing up and down on the front side near the right side of the upper swing body 15.

  The attachment 17 includes a boom 18 and an arm 19, and a polyp bucket 23, a riff mug, and the like are attached to the distal end side of the arm 19. Further, the boom 18 is pivoted in the vertical direction with respect to the upper swing body 15 by the boom cylinder 21, and the arm 19 is pivoted in the vertical direction with respect to the boom 18 by the arm cylinder 22.

  In general, the wheel type material handling machine 11 configured as described above moves on a trailer or the like when moving a long distance from the site to the site, for example. In movement, the vehicle may travel by itself using the drive wheels 12 and 12 or may travel on a general public road.

  Therefore, when the material handling machine 11 moves, as shown in FIG. 5, the arm 19 is greatly extended in front of the boom 18, as shown in FIG. The arm 19 is folded to the lower side, and the boom 18 is rotated and lowered together with the arm 19 to switch to a movement mode in which the height of the entire attachment 17 is lowered.

  Such a folding structure does not cause a legal problem in the movement of the premises in the field, but the total weight, width, length, axle load, etc. of the vehicle are limited by the vehicle restriction ordinance when traveling on general public roads. Therefore, it is impossible to travel on a general public road in the posture shown in FIG. 6, and when the amount of attachment 17 protruding beyond the vehicle body dimension toward the front of the cab 16, that is, the amount of overhang is large, the weight balance The running stability is poor, and it is a hindrance to driving visibility.

As a means for solving such a problem, a construction machine having a structure in which an attachment is folded inside a vehicle body during movement is known (see, for example, Patent Document 1 and Patent Document 2).
Japanese Patent Application Laid-Open No. 3-21193. JP-A-8-218412.

  As described above, in the construction machine structure shown in FIGS. 5 and 6, the attachment has a large overhang amount that protrudes from the vehicle body dimension toward the front of the cab, so that the running stability is poor in terms of weight balance and protrudes greatly. There is a problem that the attachment obstructs the field of view for driving. On the other hand, in the construction machine structures described in Patent Document 1 and Patent Document 2, the amount of overhang is small, but the attachment is folded inside the vehicle body. Therefore, there is a problem that the lateral width (vehicle width) of the vehicle body itself becomes large, and there is a problem that the structure becomes complicated and the cost becomes high.

  In addition, wheel-type construction machines have different excavating or lifting capabilities depending on the model, and the total weight, width, length, axle load, etc. of the vehicle are different. It is desirable to shorten the setup time by efficiently changing from the posture to the running posture and from the running posture to the working posture. Specifically, large wheel-type construction machines can run on public roads by removing all or part of attachments and counterweights, while small and medium-sized wheel-type construction machines can If attachments such as booms and arms are allowed to run on general public roads within the range permitted by the vehicle restriction ordinance, the attachment and detachment of attachments can be performed in changing work postures and running postures. Therefore, the setup time can be shortened.

  Therefore, there is a technical problem to be solved in order to easily change the working posture and the running posture and to reduce the amount of overhang of the attachment during movement. The purpose is to solve the problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a wheel type having a boom extending toward the front of the cab and having an attachment with an arm attached to the boom. In a construction machine, the boom is divided into a bottom boom and a top boom at an intermediate position, and the top boom is attached to the bottom boom so that the boom can be rotated by about 180 degrees horizontally and horizontally. Provided is a wheel-type construction machine capable of traveling on a general public road by removing the arm and folding the top side boom to the side surface of the bottom side boom.

  According to this configuration, when changing from the working posture to the traveling posture, after the arm is removed, the boom that protrudes forward from the operator's cab by rotating and folding the top-side boom to the side surface of the bottom-side boom. The amount of protrusion, that is, the amount of overhang can be reduced, and the total weight, length, and axle weight of the vehicle can be kept within the allowable values specified by the vehicle limit ordinance by adjusting the counterweight as necessary. It becomes possible.

  The invention according to claim 2 is the invention according to claim 1, wherein the arm is divided into a bottom arm and a top arm at an intermediate position without removing the arm, and the top arm is converted into a bottom arm. On the other hand, a wheel-type construction machine is provided that is mounted so as to be able to rotate approximately 180 degrees in the horizontal and horizontal directions, and that the top side arm is folded to the side surface of the bottom side arm during traveling to enable traveling on a general public road.

  According to this configuration, when changing from the working posture to the traveling posture, the top side arm is turned and folded to the side surface of the bottom side arm, and the top side boom is turned and folded to the side surface of the bottom side boom. Thus, the amount of boom protruding forward from the cab, that is, the amount of overhang, can be reduced, and the total weight, length and axle weight of the vehicle can be adjusted by attaching and detaching the counterweight as necessary. It becomes possible to keep within the allowable value specified by the vehicle restriction ordinance.

  The invention according to claim 1 can reduce the protrusion amount of the boom protruding forward from the cab during traveling, that is, the amount of overhang, so that the balance of the main body weight is improved and the visibility is also improved. Driving is possible. In addition, it is possible to shorten the setup time required for the folding operation to the retracted state of the boom, the unfolding operation from the retracted state, and the change between the working posture and the traveling posture.

  According to the second aspect of the present invention, the amount of protrusion of the boom and arm protruding forward from the cab during traveling, that is, the amount of overhang can be reduced, so that the weight balance of the main body is improved and safe traveling is possible. . In addition, the folding operation of the boom and the arm to the retracted state and the unfolding operation from the retracted state can be easily performed.Furthermore, since the boom and the arm are always attached, It is only necessary to attach and detach an end attachment such as a bucket, and attach and detach and adjust the counterweight as necessary, so that the setup time can be shortened.

  In order to achieve the purpose of making it possible to easily change the working posture and the traveling posture and to reduce the amount of overhang of the attachment during movement, a boom extending toward the front of the cab is provided, In a wheel-type construction machine having an attachment in which an arm is attached to a boom, the boom or arm is divided into a bottom side and a top side at an intermediate position, and the top side boom or top side arm is divided into a bottom side boom or bottom side. A wheel that is mounted so as to be able to rotate approximately 180 degrees horizontally and horizontally with respect to the arm, and the top side boom or the top side arm is folded to the side surface of the bottom side boom or the bottom side arm, thereby enabling traveling on a general public road. Provide construction machinery.

  Hereinafter, the wheel type construction machine according to the present invention will be described with reference to preferred embodiments. 1 and 2 are side views of a wheel type material handling machine shown as an example of a wheel type construction machine. In FIGS. 1 and 2, members corresponding to those shown in FIGS. 5 and 6 will be described with the same reference numerals. The wheel type material handling machine 11 includes a lower traveling body 13 having drive wheels 12 and 12. And an upper swing body 15 that is mounted on the lower traveling body 13 via a swing mechanism 14 so as to be rotatable.

  Further, the upper swing body 15 is provided with a cab 16 on the front side near the left side, and an attachment 17 that can swing up and down on the front side near the right side of the upper swing body 15.

  The attachment 17 includes a boom 30 and an arm 19, and a polyp bucket, a riff mug, or the like is attached to the distal end side of the arm 19. The boom 30 is pivoted in the vertical direction with respect to the upper swing body 15 by the boom cylinder 21, and the arm 19 is pivoted in the vertical direction with respect to the boom 30 by the arm cylinder 22.

  The boom 30 is divided into a bottom boom 31 and a top boom 32 at an intermediate position. The base end of the bottom boom 31 is attached to the upper swing body 15, and the base of the top boom 32 is connected to the distal end side of the bottom boom 31 via a hinge 33, lock pieces 34 </ b> A and 35 </ b> A (described later), and fixing pins 36. The end is attached. The boom 30 is configured such that the top side boom 32 is rotatable about 180 degrees horizontally and horizontally with respect to the bottom side boom 31 around a support shaft 33a extending in the vertical direction of the hinge 33.

  That is, as shown in FIG. 3 (a), the top boom 32 is in a use position where the top boom 32 is straightened forward from the tip of the bottom boom 31 and FIG. 3 (b). As shown in FIG. 4, the position can be switched to a folding position that is rotated 180 degrees clockwise around the support shaft 33a and is in close contact with the side surface of the bottom boom 31. It has become.

  As shown in FIG. 3, in the use position, the locking piece 35 </ b> A provided at the locking hole 34 a of the locking piece 34 </ b> A provided at the distal end portion of the bottom-side boom 31 and the base portion of the top-side boom 32. The locking holes 35a overlap each other. When the fixing pin 36 is inserted and engaged in common with the locking hole 34a and the locking hole 35a at the use position, the top boom 32 can be locked at the use position. When the fixing pin 36 is pulled out, the lock is released and the structure can be rotated again around the support shaft 33a toward the folding position.

  On the other hand, in the folded position, the locking hole 38 of the locking piece 34B provided on the side surface of the bottom boom 31 and the locking hole 39 of the locking piece 35B provided at the tip of the top boom 32 overlap. It has become. When the fixing pin 37 is inserted and engaged in common with both the locking holes 38 and 39 at the folding position, the top boom 32 can be locked at the folding position. On the contrary, when the fixing pin 37 is pulled out, the lock is released and the structure can be rotated again around the support shaft 33a toward the use position.

  As shown in FIG. 4, not only the boom 30 but also the arm 19 is divided into a bottom side arm 41 and a top side arm 42 at an intermediate position to divide the arm 40 (hereinafter, “arm 19” is an integrated arm, “arm 40 ”indicates a split-type arm), and similarly to the boom 30, the top-side arm 42 is rotated by about 180 degrees horizontally with respect to the bottom-side arm 41, and the top-side arm 42 is moved to the bottom-side arm 41. By folding it on the side surface, it is possible to mount the boom 30 and the arm 40 and travel on a general public road. In addition, since the structure which folds the top side arm 42 to the side surface of the bottom side arm 41 and stores it is the same as that of the boom 30, detailed description is omitted.

  In the material handling machine 11 configured as described above, the attachment 17 can be switched to the following modes 1 to 3 as necessary when traveling on a premises or traveling on a public road.

(First aspect: see FIG. 1)
In the first mode, as shown in FIG. 1, the top boom 32 extends straight forward from the tip of the bottom boom 31 while the top boom 32 is not folded with respect to the bottom boom 31 and is set in the use position. This is a mode in which it is held in a state. Further, in this first mode, the arm 19 (or the arm 40) is folded to the lower side of the boom 30, and the boom 30 is rotated downward together with the arm 19 (or the arm 40) to lower the entire attachment 17. Keep the height low. Therefore, this first aspect is suitable when the material handling machine 11 is moved on the premises.

(Second embodiment: see FIGS. 2 and 3)
As shown in FIGS. 2 and 3, in the second mode, when the working posture is changed to the traveling posture, the arm 19 (or the arm 40) is removed, and then the top boom 32 is folded to the side surface of the bottom boom 31. Thus, it is stored in the folding position. In the second mode, the top boom 32 is folded by rotating about 180 degrees horizontally and horizontally with respect to the bottom boom 31, so that the projection amount of the boom 30 protruding forward from the cab 16, that is, the overhang amount. The weight balance of the main body is improved, the visibility is improved, and safe driving is possible. Further, the folding operation for retracting the top boom 32 on the side surface of the bottom boom 31 and the unfolding operation from the retracted state are simple using the rotation of the hinge 33 by the swinging of the bottom boom 31 due to the expansion and contraction of the boom cylinder 21. This is suitable for a medium-sized wheel-type construction machine in which the arm 19 (or the arm 40) is removed and the total weight of the vehicle to which only the boom 30 is attached falls within the allowable value of the vehicle limit decree.

(Third aspect: see FIG. 4)
As shown in FIG. 4, in the third mode, when the working posture is changed to the traveling posture, the arm 40 is rotated to the lower side of the boom 30, and the top arm 42 is moved to the bottom with the arm 40 being substantially horizontal. Rotate and fold to the side surface of the side arm 41, and then swing and fold the top side boom 32 to the side surface of the bottom side boom 31 while swinging the boom 30 and making the boom 30 substantially horizontal. Thus, the protrusion amount of the boom 30 protruding forward from the cab 16, that is, the overhang amount can be reduced, the balance of the main body weight is improved, and safe traveling is enabled. Further, the folding operation for retracting the top side boom 32 and the top side arm 42 to the side surfaces of the bottom side boom 31 and the bottom side arm 41 and the unfolding operation from the retracted state are performed by the expansion and contraction of the boom cylinder 21 and the arm cylinder 22. In addition, since the boom 30 and the arm 40 are always mounted, the working posture and the running posture can be changed by attaching and detaching an end attachment such as a bucket, It is only necessary to attach and detach and adjust the counterweight as necessary, so that the setup time can be shortened, and the small wheel type construction in which the total weight of the vehicle equipped with the boom 30 and the arm 40 falls within the allowable value of the vehicle limit command. Suitable for machine.

  Therefore, in the structure of the material handling machine 11 configured as described above, the entire attachment is not moved to the inside of the vehicle body and is not folded. The problem that the structure is complicated can be solved, the amount of overhang can be reduced with a simple structure, and the weight balance of the main body can be improved.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The side view of the material handling machine to which this invention is applied. The movement posture figure of the material handling machine of the state which folded the boom. In the top view of the boom which concerns on this invention, (a) shows the state which set the top side boom part in the use position, (b) shows the state which stored the top side boom part in the folding position. The movement posture figure of the material handling machine of the state which folded the arm and the boom. The side view of the conventional material handling machine which shows the state which uses the attachment. The side view of the conventional material handling machine which shows the state which has stored the attachment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Wheel type material handling machine 12 Drive wheel 13 Lower traveling body 14 Turning mechanism 15 Upper turning body 16 Driver's cab 17 Attachment 30 Boom 31 Bottom side boom 32 Top side boom 33 Hinge 33a Support shaft 34A Locking piece 34a Locking hole 34B Locking piece 34b Locking hole 35A Lock piece 35B Lock piece 36 Fixing pin 40 Arm 41 Bottom arm 42 Top arm

Claims (2)

In a wheel-type construction machine having a boom that extends toward the front of the operator's cab and having an attachment with an arm attached to the boom,
The boom is divided into a bottom boom and a top boom at an intermediate position, and the top boom is attached to the bottom boom so that the boom can be rotated by about 180 degrees in a horizontal and horizontal direction, and the arm is removed during traveling. In addition, a wheel-type construction machine characterized in that traveling on a general public road is enabled by folding the top boom to the side of the bottom boom.   The arm is divided into a bottom side arm and a top side arm at an intermediate position without removing the arm, and the top side arm is attached to the bottom side arm so as to be able to rotate approximately 180 degrees horizontally and horizontally. The wheel-type construction machine according to claim 1, wherein traveling on a general public road is enabled by folding the top side arm to the side surface of the bottom side arm during travel.

Images