JPH0214483Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a traction device in a lifting work device mounted on a tractor.

<Prior art> In order to easily load soil, compost, etc. onto a trailer or mania spreader using a tractor, an elevating device is attached to the rear of the tractor via a three-point linkage mechanism, and the elevating device is attached to the elevating device. There is a type that is equipped with a pair of vertically installed fixed guide frames on the left and right, a lifting platform that is mounted on the fixed guide frame and driven up and down by a lifting drive device, and a working part such as a fork or bucket that is attached to the lifting platform. .

By the way, in the above-mentioned conventional device, the lifting device is not equipped with a hitch, and after loading soil or compost onto a trailer or manure spreader, a tractor is required to tow the trailer or manure spreader. I had to remove the lifting device from the truck and use the hitch at the rear of the tractor to pull it.

<Problems to be solved by the invention> For this reason, when carrying out a series of tasks such as loading soil, compost, etc. onto trailers, manufacturers, etc., and towing these materials, it is necessary to take the trouble of attaching and detaching the lifting device. Therefore, it was not possible to easily perform the above series of operations efficiently and in a short period of time.

<Means for solving the problem> The present invention is an elevating work device that can efficiently and easily carry out a series of tasks such as loading soil, compost, etc. onto trailers, manure spreaders, etc., and towing these tasks in a short time. The purpose is to provide a traction device.

Therefore, in order to achieve this object, the present invention is characterized in that a hit is provided in the center between the lower portions of both fixed guide frames.

<Embodiment> Hereinafter, the first embodiment of the present invention will be explained based on the drawings of FIGS. 1 to 3. In FIG. It is possible to drive. The tractor 1 has a vehicle body 4 consisting of an engine, a transmission case 3, etc., and a seat and a steering device are movable between a forward driving position and a rearward driving position. 7
is a hydraulic device for lifting and lowering the working machine mounted on the rear part of the transmission case 3, and has a pair of left and right lift arms 8. 10 is the rear wheel, 11 is the fender, 12 is the
It is a PTO shaft and protrudes rearward from the transmission case 3.

Reference numeral 13 denotes a lifting device which is mounted at the rear of the tractor 1 via a three-point link mechanism 16 consisting of a top link 14 and a pair of left and right lower links 15 so that it can be moved up and down. As shown in FIGS. 2 and 3, the working device 13 has a pair of vertically installed left and right fixed guide frames 18, and the upper parts of both fixed guide frames 18 are connected to an upper connecting member 19 at a midway point in the vertical direction. is connected to the middle part connecting member 20, and the lower part is connected to the lower upper and lower connecting members 21, 2.
2 are connected and integrated. These connecting members 19 to 22 have a U-shape that opens forward in plan view, and are externally fitted and fixed to both fixed guide frames 18 from the rear side. The middle connecting member 20 has a top link 14, and the lower upper and lower connecting members 21, 22.
A lower link 15 is connected to each.

Reference numeral 24 denotes a pair of vertically installed movable guide frames on the left and right, which are provided on each fixed guide frame 18 so as to be movable up and down.
The upper ends thereof are connected and integrated by a connecting member 25 or the like.

Reference numeral 26 denotes a lifting platform that can be raised and lowered with respect to the movable guide frame 24, and a pair of left and right support brackets 27 are provided.
, a guide roller 28 provided in each support bracket 27 and fitted in the movable guide frame 24 , and a pair of upper and lower finger bars 29 horizontally arranged by connecting the upper and lower ends of both support brackets 27 , respectively. It is equipped with The finger bar 29 is provided with a detachable working part. As the working part, a pair of L-shaped forks on the left and right, a bucket, etc. are used. In the case of forks, the finger bar 29 has a part that can be moved and adjusted in the lateral direction. In the case of a bucket bag, it is installed on the finger bar 29 via a mounting device.

31 is a lift cylinder, both guide frames 18, 24
A pair of left and right brackets 3 are arranged vertically upward at the central position between the brackets 3, and the lower end of the cylinder tube 32 protrudes from the front surface of the lateral center of the lower lower connecting member 22.
3 and are pivotally connected by lateral mounting pins 34. Further, a pair of left and right brackets 35 are provided below from the lower surface of the lateral center of the connecting member 25, and the upper end of the piston rod 36 is pivotally connected between the lower portions of these brackets 35 by a pin 37. The lift cylinder 31 is controlled by a control device provided in the fender 11 or the like of the tractor 1.

A sprocket 39 is rotatably supported by a support shaft 40 between the upper parts of both brackets 35, and a chain 41 wound around the sprocket 39 has one end connected to the cylinder tube 32 and the other end connected to the lifting table 26. As a result, by the expansion and contraction of the lift cylinder 31, the lifting platform 26 is driven up and down with respect to the movable guide frame 24, and the movable guide frame 24 is driven up and down with respect to the fixed guide frame 18.

Reference numeral 43 designates a hitch that is detachably attached to the lifting device 13, and includes a U-shaped attachment portion 44 in plan view that opens rearward, and a U-shaped connection portion 45 in side view that opens forward and is fixed to the front surface of the attachment portion 44. It consists of a connecting pin 46 that is detachably installed vertically in the connecting part 45. When the hitch 43 is attached to the elevating device 13, the working part is removed from the elevating platform 26, and the elevating platform 26 is brought to the substantially lowest position as shown in FIGS. 1 and 2. In this state, the rear portion of the mounting portion 44 is externally fitted onto the bracket 33 from the front and is detachably pivoted by the mounting pin 34, so that the hitch 43 can freely rotate around the mounting pin 34. and,
The attachment part 44 is passed above the lower finger bar 29, and the connecting part 45 is made to protrude forward. Reference numeral 47 denotes a collar, which is detachably attached to the mounting pin 34.

In addition, reference numeral 49 denotes a hitch mounted on the tractor 1, and a hitch box 50 is fixed to the rear lower surface of the transmission case 3 in a rearwardly protruding manner.
It is equipped with a traction rod 51 etc. provided in a rearwardly protruding shape.

According to the embodiment configured as described above, when loading soil, compost, etc. onto a trailer, manure spreader, etc., the hitch 43 is removed from the lifting device 13, and a fork, bucket, etc. is placed on the lifting platform 26. The work equipment is carried out with the work unit attached, and this makes it easy to load soil, compost, etc. onto a trailer, manure spreader, etc.

After the above-mentioned loading work is completed, when towing a trailer, mania spreader, etc., as shown in FIGS. 1 and 2, the lifting platform 26 is lowered to approximately the lowest position and A working part such as a fork or a bucket is removed from 26, a hitch 43 is attached to the bracket 33 by a mounting pin 34, and a trailer, mania spreader, etc. is connected to the hitch device 43.

This allows the lifting device 13 to be moved from the tractor 1 to the lifting device 13.
The hitch 43 can be used to pull trailers, manure spreaders, etc. without having to remove it and use the hitch 49 on the tractor 1 side. When carrying out a series of operations such as loading and towing, etc., there is no need to take the trouble of attaching and detaching the elevating device 13, and the above-mentioned series of operations can be carried out efficiently and easily in a short time.

4 and 5 show a second embodiment of the present invention, in which support plates 53 are provided inwardly protruding from the lower end surface of each fixed guide frame 18, and the inner parts of these support plates 53 are directed downwardly. The support portion 53a is bent to form a support portion 53a. The lower end of the cylinder tube 32 of the lift cylinder 31 is pivotally attached between these support parts 53a by the mounting pin 34, and the base of the attachment part 44 of the hitch 43 is fitted onto the support part 53a.
The hitch 43 is pivotally connected to the mounting pin 34 so as to be rotatable around the mounting pin 34, and the hitch 43 has a towing posture in which it projects horizontally forward from the support portion 53a as shown by the solid line in FIG. As shown by the imaginary line in FIG. 4, the position can be freely changed between the storage position and the storage position where the hitch 43 protrudes horizontally backward from the support part 53a, and the hitch 43 is removably inserted into the mounting part 44 and the support part 53a in each position. It is fixed by a fixing pin 54.

According to the second embodiment, when loading soil, compost, etc. onto a trailer, manure spreader, etc. using a working unit such as a fork or bucket attached to the lifting platform 26, the hitch 43 is kept in the storage position. , there is no need to take the trouble to remove the hitch 43,
In addition, when towing a trailer or maniac pre-tsuda, etc., the lifting platform 26 on which the working part is attached should be positioned above the lowest position as shown in Figs. 1 and 2, and the By setting the hitch 43 in the towing position, there is no need to remove the working part from the lifting platform 26, and the series of operations such as loading and towing can be performed more efficiently, in a shorter time, and more easily than in the first embodiment. I can do it.

FIG. 6 shows a third embodiment of the present invention, in which a transition plate 56 is installed between the lower end surfaces of both fixed guide frames 18.
The mounting portion 44 of the hitch 43 is attached to the lower surface of the center in the lateral direction.
Since the base of the hitch 43 is rotatably supported by the vertical support shaft 57, the hitch 43 is rotatably supported around the support shaft 57, and can freely change its posture between a towing position and a storage position. The fixing bolt 58 inserted into the portion 44 is removably screwed into the bridge plate 56, so that the hitch 43 is releasably fixed in each position.

FIG. 7 shows a fourth embodiment of the present invention, in which the lower ends of both fixed guide frames 18 are connected only by a lower connecting member 60, and a pair of left and right lift cylinders 31 and sprockets 39 are connected to each guide frame. 18,2
The cylinder tube 32 is fixed to the intermediate connecting member 20 and the lower connecting member 60, and the upper end of the piston rod 36 and A sprocket 39 is provided with a pin 37 and a support shaft 40. A hitch 43 is detachably attached to a bracket 62 protruding from the lower connecting member 60 using a mounting pin 34 in substantially the same manner as in the first embodiment.

According to the fourth embodiment, since the lift cylinder 31 is not located in the center between both the guide frames 18 and 24, when the lift cylinder 31 is provided with the hitch 43 in the lifting device 13 and the mania spreader is pulled by the hitch 43, the lift cylinder 31 As shown by the imaginary line in the figure, the PTO shaft 12 of the tractor 1
and the input shaft of the mania spreader can be easily interlocked and connected by the universal joint shaft 61.
and the lift cylinder 31 do not interfere with each other,
While spreading compost etc. with Mania Spretsuda,
Mania Spretsuda can be towed.

8 and 9 show a traction device for a lifting work device different from the present invention, in which a mounting portion 44 of a hitch 43 is shaped like a plate that is vertically elongated and has a planar shape in the front and back. 44 is removably attached to the lateral center of both finger bars 29 so as to be adjustable in lateral movement.

10 and 11 show a different traction device from the above, in which a mounting device 63 for mounting a bucket tote is detachably mounted on the lifting platform 26, and the mounting device 63 is provided in pairs on the left and right. It has a mounting plate 64 of. The mounting portion 44 of the hitch 43 includes a pair of upper and lower horizontal plates 66, three vertical plates 67 that connect both sides and the center in the horizontal direction of both horizontal plates 66, and left and right sides of the mounting portion 44. It consists of a pair of left and right brackets 68 that protrude rearward from the top. A connecting portion 45 is fixed to the central vertical plate 67, and each mounting plate 64 is detachably connected between the left and right brackets 68.

<Effects of the invention> As detailed above, according to the invention, when carrying out a series of tasks such as loading soil, compost, etc. onto a trailer, mania spreader, etc., and towing them, there is no need to go through the trouble of lifting and lowering them. There is no need to perform the work of attaching and detaching the device, and the above-mentioned series of works can be carried out efficiently and easily in a short time. The present invention has the various advantages mentioned above and is of great practical benefit.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a front view of the lifting device, and FIG. 3 is taken along the line A-A in FIG. 2. 4 and 5 show a second embodiment of the present invention, FIG. 4 is a longitudinal sectional view of the main part, FIG. 5 is a front view of the same, and FIG. 6 is a second embodiment of the present invention. FIG. 7 is a front view of a lifting device showing a fourth embodiment of the present invention, and FIGS. 8 and 9 are another lifting device of the present invention. Fig. 8 is a side view of the main parts, Fig. 9 is a front view of the same, and Fig. 10 is a traction device.
11 and 11 show another example of the above-mentioned traction device, with FIG. 10 being a side view and FIG. 11 being a front view. 1...Tractor, 13...Elevating work device, 16
... Three-point link mechanism, 18, 24 ... Fixed/movable guide frame, 26 ... Lifting platform, 31 ... Lift cylinder, 43, 49 ... Hitachi.

Claims (1)

[Scope of utility model registration request] A lifting device attached to a tractor,
A traction device for an elevating work device, characterized in that a pair of vertically installed fixed guide frames are provided with an elevating platform that is driven up and down, and a hit is provided in the center between the lower portions of both fixed guide frames.