JPH0141802Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a working part mounting device for a lifting work device, and an object of the present invention is to enable the working part to be mounted easily and in a short time.

For example, in a bucket-type elevating work device that is attached to the rear of a tractor, the guide frame is equipped with an elevating platform that is driven up and down, and a pair of left and right mounting bodies protrude forward from the elevating platform. By attaching the provided pair of left and right attachment bodies, the bucket is attached to the attachment body.

By the way, conventionally, the upper part of the attached body is simply removably engaged with a horizontal support pin provided on the upper part of the attached body from the lower side, so that the bucket on the upper part of the attached body is lifted by the attached body. At times, it is supported so that it can rotate downward around the support pin due to its own weight,
The bucket belt was attached to the mounting body by inserting a fixing pin laterally into the lower part of the mounting body and the lower part of the mounting body to prevent rotation of the working part around the support pin.

For this reason, conventionally, when installing a bucket, the support pin of the bucket that is placed on the ground etc. is scooped up with the upper part of the attached body, the bucket is lifted by the attached body, and its own weight causes the downward side to move around the support pin. The problem is that the fixing pin must be inserted by rotating the fixing pin hole in the lower part of both the mounting body and the mounting body in a corresponding manner, which makes it difficult to install the bucket easily and in a short time. It was hot.

The present invention has solved the above problem, and its characteristics are that the guide frame is equipped with an elevating platform that is driven up and down, and the working part can be freely attached and detached to a mounting body that protrudes forward from the elevating platform. In an elevating work device installed in The fixing device is supported so that it can rotate relative to the lower side around the support pin due to its own weight when it is up, and is inserted laterally into the lower part of the attached body and the working part to releasably prevent the working part from rotating around the support pin. For fixing pins, the pin is provided so as to be freely changeable in position by lateral movement between a fixed position inserted in both of the above and a fixed release position separated from at least one of the above, and biases the fixed pin toward the fixed position. A bullet is provided, and a fixing pin holder is provided so that the position can be changed freely between a holding position where the fixing pin is held in the fixing release position and a holding release position, and the holding body is provided with a holding body that holds the fixing pin in the fixing release position and a holding release position. It is equipped with a response part that changes the position of the holding body from the holding position to the holding release position by rotating into contact with the working part side, and is provided with a holding body bullet that urges the holding body toward the holding position side. It is in.

Hereinafter, the first embodiment of the present invention will be described based on the drawings of FIGS. 1 to 7. In FIG.
is a traveling work vehicle, exemplified by an agricultural tractor, which can be driven in both forward and backward directions. The vehicle 1 has a vehicle body 4 including an engine 2, a transmission case 3, etc., and a seat 5 and a steering device 6 that are movable between a forward driving position and a rearward driving position. 7 is a hydraulic system for lifting and lowering the work machine mounted on the rear part of the transmission case 3.
It has a pair of left and right lift arms 8. 9 is a head guard, and 10 is a rear wheel.

Reference numeral 13 denotes a lifting device which is mounted at the rear of the vehicle 1 via a three-point link mechanism 14 so as to be able to move up and down.
As shown in FIG. 2, the working device 13 has a pair of vertically installed left and right fixed guide frames 15, and both fixed guide frames 15 are connected to the three-point link mechanism 14. Both fixed guide frames 15 are provided with a pair of left and right movable guide frames 16 that are connected and integrated and can be moved up and down. Reference numeral 17 denotes an elevating platform, which can be raised and lowered from the movable guide frame 16 via a pair of upper and lower guide rollers 18 on the left and right. For 15,
It is driven up and down by a lift cylinder and a lift chain (not shown). Note that the lift cylinder can be controlled on the vehicle 1 side. Lifting platform 17
, a pair of upper and lower finger bars 19 installed horizontally on the front side of the guide frames 15 and 16, and both finger bars 1 are provided.
A pair of left and right connecting members 20 connecting the left and right sides of 9.
It is equipped with

Reference numeral 21 denotes a pair of left and right supports, which are U-shaped with a front opening in plan view.
It is attached in a forward-protruding manner on both the left and right sides so that it can be moved and adjusted in the lateral direction.

22 is a bucket exemplified as a working part;
As shown in FIGS. 7 to 7, a pair of mounting bodies 23 are provided to protrude rearward from both left and right sides of the rear surface. The mounting body 23 has a U-shape that opens rearward in plan view, and consists of a base plate 23a fixed to the rear surface of the bucket 22, and a pair of left and right side plates 23b. A support pin 24 is provided across the side plate portions 23b to protrude outward from the both side plate portions 23b, and a pin hole 25 is formed laterally through the lower portion.

Reference numeral 26 denotes a pair of left and right attachment bodies for attaching the bucket bag 22 to the support body 21, and these attachment bodies project forward from inside the support body 21. The mounting body 26 includes a pair of left and right side plate portions 26a and a cylindrical portion 26b connecting the center portions of the side plate portions 26a.
The pivot pin 2 is inserted into the cylindrical portion 26b.
7 is pivotally supported on the front end portion of the support body 21. The front portions of the side plate portions 26a are disposed outside the corresponding side plate portions 23b of the mounting body 23, and an engaging portion 28 opening diagonally upward and backward is formed in the upper portion thereof. Since the joint portion 28 is removably engaged with each end of the support pin 24 from below,
A bucket bag 22 is supported on the upper part of the mounting body 26 so as to be rotatable relative to the lower side around the support pin 24 by its own weight when lifted by the mounting body 26.

Reference numeral 29 denotes a pair of left and right cylindrical bodies with bottoms, which protrude outward from the lower part of the front end of the side plate part 26a on the outer side of each mounting body 26. Each cylinder body 29 has a fixed pin 30. is movable laterally.

The fixing pin 30 is the support pin 24 of the bucket 22.
It releasably blocks the rotation of the mounting body 26 as shown in FIG.
The pin hole 31 at the lower end of the front end of both side plate parts 26a and the pin hole 25 at the lower end of both side plate parts 23b of the mounting body 23
As shown in FIG. and a fixing release position located approximately in the center between the side plate portions 26a and 26b on the outer side of the mounting body 23, and a removal position slightly shifted further outward from the fixing release position as shown in FIG. It is said that the position can be changed freely.

The outer end of the fixing pin 30 is bent, and a disc-shaped receiving plate 32 is fitted and fixed inside the cylindrical body 29 of the fixing pin 30, so that the outer end of the receiving plate 32 and the cylindrical body 29 of the fixing pin 30 are fixed. A fixing pin bullet 33 is elastically wound around the fixing pin 30 between the end and the bottom, thereby urging the fixing pin 30 toward the fixing position.

Reference numeral 34 denotes a guide groove, which is formed on the outer peripheral part of the cylinder body 29, with a first groove part 34a formed outward in the axial direction from the inner end of the cylinder body 29, and a guide groove formed in the circumferential direction from the outer end of the first groove part 34a. A protrusion 35 that protrudes in the radial direction from the receiving plate 32 closes the first groove 34a when the fixing pin 30 moves between the fixed position and the unlocked position. By moving and locking the protrusion 35 in the second groove 34b, the fixing pin 30 is held at the removal position.

Reference numeral 36 denotes a pair of left and right holders, which releasably hold the fixing pin 30 in the fixing release position, and are rotatably mounted on the lower side of the inner surface of the side plate portion 26a on the outer side of the mounting body 26 by means of a support shaft 37. supported by the fourth
As shown in FIGS. 3 and 6, there is a holding position in which the fixing pin 30 is held in the unlocked position by contacting the inner end of the fixing pin 30, and as shown in FIGS. 3 and 5,
The pin hole 38 formed in the holder 36 is connected to the fixing pin 3
The position can be freely changed between 0 and a corresponding holding release position. The front part of the holding body 36 is provided with a triangular responsive part 36a that protrudes forward. The responsive portion 36a comes into contact with the rear surface of the bucket 22, and the holder 36 is rotated to the rearward holding release position.

Reference numeral 39 denotes a holding body elastic device, which is elastically interposed between the holding body 36 and the side plate portion 26a on the outer side of the mounting body 26, and urges the holding body 36 toward the holding position; The holding body 36 is in the holding position, and the side plate portion 26a is
It is in contact with a stopper 40 that protrudes inwardly from the top.

41 is a hydraulic cylinder that rotates the bucket 22 around the pivot pin 27, and is interposed between the upper end of the rear part of the support body 21 and the lower end of the rear end of the mounting body 26;
It is included in the support body 21.

According to the embodiment configured as described above, when attaching the bucket belt 22, as shown in FIGS. 4 and 6, the fixing pin 30 is held in the fixed release position by the holder 36, The rotating position of the mounting body 26 is set so that the joining part 28 is opened upward, and the lifting table 17 is set at the lowest position.

Then, the bucket 22 is placed on the ground, etc., the vehicle 1 is moved backward, and the attached body 26 is brought close to the bucket 22, as shown in FIG.
The engaging portion 28 of 6 is engaged with the support pin 24 by scooping it up from below, and in this state, the lifting platform 1
7, the rear side of the bucket 22 is lifted and rotated relatively downward around the support pin 24 due to its own weight. As a result, Bucket 22
The rear surface rotates the holding body 36 rearward via the responsive portion 36a to bring it to the holding release position. Then, the fixing pin 30 moves to the fixed position as shown in FIG. When installing, there is no need to perform troublesome pin hole alignment, etc., as in the conventional method.
The bucket 22 can be attached easily and in a short time.

Next, when removing the bucket 22, the bucket 22 is grounded and the fixing pin 30 is pulled out to the removal position, and the fixing pin 30 is rotated to lock the protrusion 35 in the second groove 34b. This holds the fixing pin 30 in the removed position. Then, by rotating the holding body 36 by the cylinder 41 and moving the vehicle 1 forward, the lower part of the front part of the mounting body 36 is pulled out from inside the mounting body 23, and the holding body 36 is returned to the holding position by the bullet 39. let In this state,
After lowering the lifting platform 17 and disengaging the engaging portion 28 from the support pin 24 downward, the vehicle 1 is moved forward and the mounting body 26 is pulled out from between the mounting bodies 23.
The work of removing the bucket 22 is completed.

8 to 10 show a second embodiment of the present invention, in which a mounting body 26 is inserted between both side plate portions 23b of the mounting body 23, and a mounting body 26 is inserted between the side plate portions 23b on the outer side of the mounting body 23. A cylindrical body 29, a fixing pin 30, etc. are provided on the holder. Further, the holding body 36 is pivotally supported at its upper end on the lower inner surface of the side plate portion 23b on the outer side, and its upper end projecting rearward is an inclined responsive portion 36a. , Bucket 2
2, when attaching the side plate 2 on the outer side of the mounting body 26.
It is operated by an actuating body 42 protruding forward from the outer surface of 6a. The holding body ammunition 39 includes a holding body 36 and a side plate portion 23 on the outer side of the mounting body 23.
The stopper 40 is elastically interposed with the side plate 23b, and the stopper 40 projects from the side plate 23b.

FIG. 11 shows a mounting device for a lifting work device that is different from the present invention, and is attached to a tractor 45 via a three-point linkage mechanism 48 consisting of a top link 46 in the center and a pair of lower links 47 on the left and right. , a guide frame 50 of an elevating device 49 is mounted so as to be movable up and down. The top link 46 is pivotally supported on a mounting base 51 at the rear end of the tractor 45, and the lower link 47 is attached to a lift rod 5 on a lift arm of a hydraulic system for lifting and lowering a working machine.
They are connected via 2. A mounting portion 53 that opens upward is formed in a cutout at the tip of the lower link 47 . A mounting bracket 54 is protruded forward from the lower part of the guide frame 50.
Attachment portion 5 is attached to attachment pin 55 protruding inwardly from
3 is removably engaged from the lower side. Reference numeral 56 denotes a rectangular plate-shaped retaining member, which is attached to the mounting portion 5 of the mounting pin 55.
3, and is pivotally supported by a horizontal shaft 57 on the inner surface of the lower link 47 on the base side of the mounting portion 53.
The opening at the upper end is opened and closed from above, and is interlocked and connected to the mounting base 51 via an interlocking rod 58. Then, by the operation of the interlocking rod 58, the first
As shown by the imaginary line in FIG. 1, when the mounting portion 53 is below the mounting pin 55, the retaining member 56 is in the open position, and as shown by the 11th solid line, the mounting portion 53 is positioned below the mounting pin 55. When engaged, the retaining member 56
is in the closed position.

FIG. 12 shows an example in which the shape of the retaining member 56 is different from that in FIG. 11, and the retaining member 56 is
It has a U-shape that opens rearward, and its lower bent portion is pivoted to the lower link 47 by a horizontal shaft 57, and its upper side opens and closes the upper end opening of the mounting portion 53, and is interlocked with the tip of the lower side. A rod 58 is connected.

As described in detail above, according to the present invention, when installing the working part, there is no need to perform troublesome pin hole alignment, etc., as in the conventional art, and the working part can be installed easily and in a short time. The present invention has the above advantages and is of great practical benefit.

[Brief explanation of drawings]

1 to 7 show a first embodiment of the present invention, FIG. 1 is an overall side view, and FIG. 2 is an A--
A sectional view taken from line A, Figure 3 is an enlarged view of the main parts of Figure 1,
Fig. 4 is a side view of main parts showing an operating state different from Fig. 3, Fig. 5 is a sectional view taken along the line B-B in Fig. 3, and Figs. 6 and 7 are different from Fig. 5. 8 to 11 are rear sectional views showing the operating state, and FIGS. 8 to 11 are rear sectional views showing the second embodiment of the present invention, and FIGS. The figure is number 8
11 is a side view showing a mounting device for a lifting work device different from the present invention; FIG.
FIG. 2 is a side view of the main parts of another example of the mounting device. 1... Work vehicle, 13... Lifting work device, 14
... Three-point linkage mechanism, 15, 16 ... Fixed/movable guide frame, 17 ... Lifting platform, 21 ... Support body, 22
... Bucket (working part), 23 ... Mounting body, 24
... Support pin, 26 ... Mounting body, 30 ... Fixed pin, 33 ... Fixed pin bullet, 36 ... Holding body,
36a...Response part, 39...Holding body ammunition.

Claims (1)

[Scope of utility model registration request] The guide frame is equipped with a lifting platform that is driven up and down,
In an elevating work device in which a working part is removably attached to a mounting body protruding forward from a lifting platform, the upper part of the mounting body is removably engaged with the working part from below via a lateral support pin. By doing so, the working part is supported by the upper part of the fitted body so that it can rotate relatively downwardly around the support pin by its own weight when lifted by the fitted body, and is inserted laterally into the lower part of the fitted body and the working part. A fixing pin that releasably blocks the rotation of the working part around the support pin can be changed in position by lateral movement between a fixed position where it is inserted into both of the above and a fixed release position where it is removed from at least one of the above. A fixing pin spring is provided which urges the fixing pin toward the fixing position, and the fixing pin holder can be freely changed between a holding position in which the fixing pin is held in the fixing release position and a holding release position. The holding body is provided with a responsive part that changes the position of the holding body from the holding position to the holding release position by coming into contact with the working part side when the working part rotates downward, and the holding body is held. A working part mounting device for a lifting work device, characterized in that it is equipped with a holder bullet that biases it toward the position side.