JP2885421B2 - Work vehicle attachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to an attachment device that can be used for a work vehicle in a narrow overflow area such as a cargo handling operation on a ship.

[Prior art]

Conventionally, for cargo handling work in a ship, for example, scraping and pushing of a processed material in a hold, and bottom dring work, etc.
A work vehicle is used in which a work blade is slidably mounted on a front end loader as disclosed in Japanese Patent No. 148933 via a quick coupler so as to be slidable laterally with respect to a support. This work vehicle is effective in handling a large amount of processed material at a time in a place where there is no obstacle around it, and its blades slide in the horizontal direction, but it is effective, but the vehicle is tilted on irregular terrain such as inside a ship When working with, the blades cannot be moved along the wall of the frame, and the frame and the blade may interfere and damage the frame of the hold,
Also, it was not possible to adjust the cutting edge so as to be parallel to the inclined surface at the corner. There is also known a structure in which an earthwork plate is tilted right and left by using a hydraulic cylinder. However, since the cylinder needs to be arranged in a horizontal direction, the earthwork plate has a width sufficient to take a predetermined cylinder stroke in the left-right direction. Had to be there.

[Problems to be solved by the invention]

The present invention has been made in view of the above circumstances, and its main problem is that the front support plate can be tilted to the left and right even if the fluid pressure cylinder is vertically oriented and the width of the rear support plate is short. At the same time, work tools such as blades supported by the arm
It is an object of the present invention to provide an attachment device for a work vehicle which can be tilted right and left to easily perform work on irregular terrain such as in a ship or in a narrow overflow area.

[Means for solving the problems]

According to the first aspect of the present invention, a substantially semicircular front support plate smaller than the rear support plate is rotatable left and right on the front surface of the substantially rectangular rear support plate held by the work vehicle. Pivot,
One end of the rear support plate is pivotally mounted above one of the left and right sides which does not overlap with the front support plate, and the other end is pivoted below the same side of the front support plate to a deviated position offset from the rotation center point. The front support plate is tilted to the right and left within a predetermined angle range by the expansion and contraction movement, and the arm with the base end fixed to the front surface of the front support plate is provided. At the tip of the arm, a working tool such as a two-way blade is rotatably supported back and forth, and a fluid pressure cylinder having a base end fixed to the front surface of the upper front support plate and a tip pivotally attached to the working tool is provided. A technical means is employed in which the working tool is tilted back and forth within a predetermined angle range by the expansion and contraction. In the invention of claim 2, in addition to the above configuration, a receiving portion such as a hook is formed on the back surface of the rear support plate held by the work vehicle, and the receiving portion is connected to the tip end side of the attachment holding mechanism of the work vehicle. Technical measures are taken to be detachably connected to the quick coupler. According to the third aspect of the present invention, a guide groove formed on a front wall of the rear support plate is formed on a protruding wall that is fitted and slid on a peripheral edge of the front support plate when the front support plate is tilted left and right. Have taken strategic steps. In the invention of claim 4, the working implement is a two-way blade, the tip of the arm is pivotally attached to a bracket provided at the upper rear, and the tip of the hydraulic cylinder for tilting forward and backward is attached to the bracket extending upward at the center. It has taken the technical measures of being pivoted.

[Action]

According to the invention of claim 1, on the front surface of the rear support plate held by the work vehicle, the front support plate is moved within the range of a predetermined angle by the expansion and contraction of the fluid pressure cylinder vertically arranged for tilting left and right. When tilted left and right, the arm and a working tool such as a two-way blade pivotally attached to the tip of the arm are tilted left and right at a desired angle in conjunction with the front support plate. In addition, a working tool such as a two-way blade can be tilted back and forth within a predetermined angle range by extension and contraction of a hydraulic cylinder for tilting back and forth while being supported by the arm. According to the second aspect of the present invention, since the receiving portion of the quick coupler is formed on the base, it can be detachably connected to the quick coupler provided in the work vehicle. According to the third aspect of the present invention, the support plate is guided by the guide groove, so that the support plate can be stably tilted in the left-right direction. Can be received.

【Example】

Hereinafter, a preferred embodiment of an attachment device for a work vehicle according to the present invention will be described with reference to the drawings. A work vehicle attachment device 1 shown in FIGS. 1 and 2 is a truck type loader 2 which is an example of a work vehicle.
It is detachably attached to the attachment holding mechanism 2A. Here, in the case of the present embodiment, the attachment holding mechanism 2A is configured to lift the lift arm 21 pivotally attached to the vehicle by a lift cylinder.
The tilt arm 23 is tiltably supported by a tilt cylinder 24.The tip of the lift arm 21 and the tip of a rod 25 pivotally attached to the tip of the tilt arm 23. It has a known configuration in which a quick coupler 3A is pivotally mounted. On the other hand, the attachment device 1 of the work vehicle supports the front support plate 7 on the rear support plate 4 serving as a base. That is, as shown in FIG. 1, the front support plate 7 has a pair of brackets protruding from the rear surface thereof, a hook 31 protruding above the bracket, and a pair of lock pin insertion holes 32 provided below the front support plate 7. A receiving portion 3B detachably connected to 3A is formed. Further, as shown in FIG. 3 when the attachment device is viewed from the front, a pivot pin 6 protruding forward is provided at the lower center of the front surface of the rear support plate 4. As shown in FIG. 7, the pivot pin 6 has a base end fixed to the rear support plate 4 and a front support plate 7 rotatably supported via a boss 62 at the front end via a bearing 61. ing. In the drawing, 63 is a retainer screwed to the pivot pin 6,
64 is grease fitting. In this manner, the semi-circular front support plate 7 is pivotally supported by the pivot pin 6, and the front support plate 7 can be tilted to the left and right with the pivot pin 6 as a rotation center point P1. Further, in this embodiment, a projecting wall 8 ′ formed with a guide groove 8 for fitting the outer peripheral edge of the front support plate 7 and slidably guiding the front support plate 7 is formed on the front surface of the rear support plate 4. In this embodiment, the protruding wall 8 'is formed in a channel shape as shown in FIG. 9 on a protruding wall having a rectangular cross section which extends in an arc shape and an arc-shaped plate which covers the upper surface of the protruding wall and extends inwardly is bolted. , Which are provided in the guide grooves 8. Then, on the front support plate 7, the pivot pin 6
The center protruding wall 8A 'having a central guide groove 8A at an upper central position at equal intervals around the center, and left and right protruding walls 8B' and 8C 'having left and right guide grooves 8B and 8C are provided at left and right positions. Further, the outer periphery of the front support plate 7 forms an arc-shaped central protruding portion 7A protruding at a large diameter at a central portion thereof.
7B and 7C are provided. A part of the central protruding edge 7A is always inserted into the central guide groove 8A, and a part of the left and right outer edges 7B, 7C is also always inserted into the left and right guide grooves 8B, 8C, so that the guide is always guided. At the same time, the protruding wall 8 ′ forming the guide groove 8 restrains the forward and backward movement by receiving a forward load applied to the outer peripheral edge of the front support plate 7. Next, in this embodiment, the first hydraulic cylinder 9 is used for tilting the front support plate 7 to the left and right, and the first hydraulic cylinder 9 is attached to the rear support plate 4 and the front support plate 7 by brackets. B1, B2
Mounted in parallel via That is, the first hydraulic cylinder 9 is connected to the hydraulic system of the truck type loader 2 and can be operated by an operation lever in the cab. One end (head end in the illustrated example) of the first hydraulic cylinder 9 is pivotally connected to an upper position (upper left position in the figure) of the rear support plate 4 via a bracket B1, and the other end (rod end in the illustrated example). Is the front support plate 7
It is pivotally connected via a bracket B2 to a position (lower left position in the figure) eccentric from the pivot pin 6 which is the center of rotation of. Here, as shown in FIG. 8, the head end of the first hydraulic cylinder 9 is held by a bracket B1 and is pivotally attached to a pin 91 which is detachably attached to the rear support plate 4, and is connected to the rod end side. Is also pivotally attached to bracket B2. Therefore, the front support plate 7 can be tilted left and right within the range of the predetermined rotation angle while being guided by the guide groove 8 on the rear support plate 4 by the expansion and contraction movement of the rod of the first hydraulic cylinder 9. The rotation angle here is set to be tiltable by an angle equal to the left and right about the center position. In the above embodiment, the linear motion exemplified by the hydraulic cylinder is used for the rotation of the front support plate 7, but a rotational motion such as rotating the front support plate 7 by the rotation of a power transmission device of a gear or other rotation shafts is used. You may. Next, the arm 11 is connected to the front surface of the front support plate 7 via a bracket B3 protruding forward from the front surface, as is clear from FIGS. In this embodiment, the arm 11 is set to a predetermined length corresponding to the depth of the obstacle in the hold. At the end of the arm 11, a blade 12 is provided.
It is pivotally mounted via a bracket B4 projecting from the upper rear of the twelve, and can be tilted back and forth about a pivot P2. A second tilt is used for tilting the small blade 12 back and forth.
A hydraulic cylinder 13 is pivotally connected at one end to a bracket B5 rising on the small blade 12, and is pivotally connected at the other end to a bracket B6 provided on the front support plate 7. The second hydraulic cylinder 13 is also connected to the hydraulic system of the truck type loader 2 and can be controlled in the cab. Further, in the case of the present embodiment, the blade body 2A uses a substantially wedge-shaped two-way blade having curved surfaces on both front and rear in order to adapt both the pushing operation and the pulling operation as shown in FIG. The small blade 12 is moved forward and backward by the operation of a second hydraulic cylinder 13 interposed between the small blade 12 and the front support plate 7. By moving the rod of the first hydraulic cylinder 9 in and out, the front support plate 7 moves right and left on the rear support plate 4 about the rotation center point P1 as shown in FIGS. The blade 12 is tilted right and left via an arm 9 attached to the front support plate 7 in conjunction with the rotation. Therefore, the attachment device 1 can tilt and hold the blade 10 in accordance with the target object by the rotation of the front support plate 7 even when the vehicle is inclined, for example, during a cargo handling operation. There is no interference with the ship wall. In the present invention, a bucket, a fork, or another working tool may be used as the working tool attached to the front support plate 7. In this embodiment, the attachment device is detachably attached to the work vehicle via the quick coupler. However, in the present invention, the base may be fixed to the work vehicle. In other words, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

【The invention's effect】

According to the present invention, the work implement is disposed at the front position by the arm, and can be tilted back and forth by the hydraulic cylinder that needs to be tilted back and forth, and the support plate connected via the arm is tilted left and right. The working implement can also be tilted to the left and right in conjunction with it. Thereby, even if the lateral width of the rectangular rear support plate is narrow, the front support plate is made substantially semicircular, and one end of a hydraulic cylinder for left and right tilting is pivotally mounted near the left and right corner where they do not overlap, and the other end is formed. Is pivotally attached to the outside of the arm of the front support plate on the same side and is oriented vertically so that the expansion / contraction stroke of the hydraulic cylinder can be taken. In addition, since the working tool such as the blade can be tilted back and forth and left and right as described above, it is possible to easily perform work in a narrow overflow area such as in a ship or on uneven terrain. For example, it is used for scraping work between frames of a hold, scraping of a corner portion, and bottom dredging work in an inboard work, and can contribute to improvement in efficiency. Further, if the rear support plate of the attachment device is held by a lift arm mounted on the work vehicle, the reach becomes longer, which is suitable for scraping work at a high place. Further, if a configuration is adopted in which the attachment device is engaged with the quick coupler so as to be detachable from the work vehicle, it is possible to easily replace the work equipment according to the work content. In addition, even on a rough terrain such as in a ship, even when the vehicle is in an inclined position, the work implement can be maintained in a horizontal posture by tilting the work implement left and right to perform the work.

[Brief description of the drawings]

FIG. 1 is a side view showing an undulating operation of a two-way blade of an embodiment in which an attachment device for a work vehicle according to the present invention is mounted on a truck type loader, FIG. 2 is a side view showing the whole of this embodiment, and FIG. Front view showing a tilt neutral position of the two-way blade device and the front support plate,
4 is a front view showing the right tilt, FIG. 5 is a front view showing the left tilt, FIG. 6 is a plan view of FIG. 3, and FIG. 7 is a view showing a pivot pin mounting structure. VII line sectional view,
FIG. 8 is a sectional view showing the pivot structure of the first hydraulic cylinder, and FIG. 9 is a sectional view taken along line IX-IX of FIG. 3 showing the engagement state of the guide grooves. DESCRIPTION OF SYMBOLS 1 ... Attachment device of work vehicle 2 ... Truck type loader 2A ... Attachment holding mechanism 3A ... Quick coupler 3B ... Receiving part 4 ... Rear support plate 6 ... Pivot pin 7 ... Front support plate 8 ... Guide groove 9 First hydraulic cylinder 11 Arm 12 Small blade 13 Second hydraulic cylinder 20 Small attachment

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Koga 1-3-2 Kitaaoyama, Minato-ku, Tokyo Inside New Caterpillar Mitsubishi Corporation (72) Ryosuke Nakata 1-2-3 Kitaaoyama, Minato-ku, Tokyo New Caterpillar Mitsubishi Corporation (56) References JP-A-63-284326 (JP, A) JP-A-60-148933 (JP, A) Fully open 63-121658 (JP, U) Really open 80835 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) E02F 3/36

Claims (4)

(57) [Claims] 1. A substantially semicircular front support plate smaller than the rear support plate is pivotally supported on the front surface of a substantially rectangular rear support plate held by a work vehicle so as to be rotatable left and right. One end is pivoted above one of the left and right sides which does not overlap with the front support plate, and the other end is pivotally attached to a deviated position offset from the center of rotation below the same side of the front support plate. A fluid pressure cylinder arranged in a predetermined direction, the front support plate is tilted to the right and left within a predetermined angle range by the expansion and contraction thereof, and an arm having a base end fixed to the front surface of the front support plate is protruded. A working pressure tool, such as a two-way blade, is rotatably supported at the front end of the front support plate, and a base end is fixed to the front surface of the front support plate, and the front end is pivotally attached to the working tool. The provided Linda, attachment apparatus for a working vehicle, characterized by comprising is tilted back and forth to work Kigu with its telescopic movement within a predetermined angle. 2. A receiving portion such as a hook is formed on the back surface of a rear support plate held by a work vehicle, and is detachably connected to a quick coupler connected to a tip end of an attachment holding mechanism of the work vehicle. The attachment device for a work vehicle according to claim 1, wherein the attachment device comprises: 3. A front wall of the rear support plate is provided with a guide groove formed in a protruding wall for fitting and sliding a peripheral edge of the front support plate when the front support plate is tilted left and right. The attachment device for a work vehicle according to claim 1 or 2. 4. A work implement is formed of a two-way blade. A tip of an arm is pivotally attached to a bracket provided at an upper rear portion, and a tip of a hydraulic cylinder for tilting forward and backward is pivotally attached to a bracket extending upward at the center. The attachment device for a working vehicle according to claim 1, 2 or 3, wherein the attachment device is provided.