JPH041187Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention a. Field of Industrial Application The present invention relates to a three-point frame crane for agricultural use that can be attached to a three-point link of an agricultural tractor.

b. Conventional technology For example, when spraying fertilizers such as chemical fertilizers, which is a type of agricultural work, before starting the work, the fertilizer spreader, which is a fertilizer spreader attached to a three-point linkage of a tractor, is placed near the hopper input port of a broadcaster or lime sawer. The hopper is filled with fertilizer by lifting the fertilizer bag manually, cutting the fertilizer bag open, and pouring the fertilizer into the hopper.

Once the filling of fertilizer into the hopper is complete, the tractor is moved to the field where the fertilizer will be spread, and the rotational power of the tractor is transmitted to the fertilizer spreader via the swivel transmission shaft to carry out the spreading work.

Once all the fertilizer in the hopper has been spread, the hopper is filled with fertilizer again according to the above-described procedure and the spreading operation is continued.

Also, when loading harvested products or agricultural materials onto a trailer connected to a tractor joint and transporting them, relatively light items are lifted manually and loaded onto the floor of the trailer, and other items are loaded onto a trailer that is being pulled by the tractor. After grounding the loading section of the front loader installed on another tractor and transferring the material to the loading section, operate the front loader and tractor to move the loading section of the front loader near the trailer loading platform and transfer the materials to the trailer loading platform. Transfer to.

Next, the tractor connected to the trailer is operated to move to a desired position, and the materials are unloaded in the reverse order of the above procedure.

Instead of loading and unloading materials using the front loader described above, a crane installed at the rear of a traveling machine base equipped with a traveling device disclosed in Japanese Patent Application Laid-open No. 53-56801 can be used to perform, for example, fertilizer spreading work. When loading and unloading work at the hopper, lift the fertilizer bag with a crane and move it near the hopper input port.
This involves cutting open the fertilizer bag and filling the hopper with fertilizer.
When loading and unloading materials onto a trailer using the crane disclosed in Publication No. 56801, the materials are lifted by the crane, moved onto the trailer platform, and loaded or unloaded in the reverse order.

C. Problems that the invention aims to solve The work of manually filling the hopper of a fertilizer spreader with fertilizer, which is part of the fertilizer spreading work, or the work of loading and unloading materials onto a trailer using input, places a large labor burden on the worker. There are too many problems.

To solve this problem, there is a method of loading and unloading materials using a front loader installed on a tractor or a crane installed at the rear of a traveling vehicle as disclosed in Japanese Patent Laid-Open No. 53-56801.

However, although the above-mentioned work using a front loader or crane reduces the labor burden on workers, it is necessary to invest in a tractor with a front loader or a traveling vehicle with a crane in addition to a tractor for spraying or transportation work. This also increases the economic burden on farmers.

In addition, in order to carry out loading and unloading work using a traveling vehicle equipped with the above-mentioned front loader or crane, a large area is required for the vehicle to run and turn, and the storage and loading and unloading areas for agricultural materials are required. This also poses a problem as it is limited.

B. Structure of the invention a Means for solving the problem The present application attempts to solve the above-mentioned problem with the following structure.

That is, an upper locking part that engages with the top link of the tractor's three-point link is provided on the upper back of the main frame, and a pair of lower locking parts on the left and right that engage with the lower link are provided below, while the work machine is installed on the upper front of the main frame. An upper locking portion that engages with the top link locking portion of the three-point frame is provided, and a pair of left and right lower locking portions that engage with the lower link pin are provided below, and a vertical axis is located approximately at the center of the top of the main frame. This is a three-point frame crane with a structure in which a crane mast is provided around the crane mast so that it can be rotated and locked, and a boom that is equipped with a support fitting is provided on the crane mast so that it can move up and down.

b Example of the invention T represents a tractor, T1 represents a top link, T2 represents a lower link, T3 represents a tractor hydraulic lever, and T4 represents a hydraulic pressure outlet.

A is a crane. 1 is a front gate type main frame, 1A is a top link bracket for connecting to top link T1, 1B, 1B are lower link pins to connect to lower link T2, and these are fixed to the back side of the main frame. has been done.

1C is a top link pin passed through the top link bracket.

2 is a crane mast fixedly or rotatably disposed at the center of the upper part of the main frame 1. In this case, the crane mast may be rotated hydraulically or manually.

B is a boom. 3 is crane mast 2
The boom body is pivotally attached to the boom body with a pin 3B, and 3A is the rear end of the boom body, which serves as the attachment part for the cylinder 5.

3B is a boom attachment pin, and 3C is a cylinder attachment.

4 is a slide boom that is slidably fitted into the boom body 3. 4A is a hook attachment, 4B is a cylinder attachment, 4C is a hook attachment pin, and 4D is a cylinder attachment pin.

5 is a hydraulic cylinder whose one end is attached to the upper end of the crane mast and the other end is attached to the rear end of the boom body with pins 3D and 2A.

6 is a hydraulic cylinder whose both ends are attached to cylinder attachments 3C and 4B with cylinder attachment pins 3D and 4D.

7 is a chain, and 8 is a hanging hook.

9 is a hydraulic controller fastened to a base plate 10 attached to the crane mast 2; 9A is a lever for lifting and lowering the boom; and 9B is a lever for extending and retracting the boom B.

11 is a hose that connects the hydraulic cylinder 5 and the hydraulic controller 9.

12 and 13 are a hydraulic cylinder 6 and a hydraulic controller 9
This is a hose that connects the

14 is a hose having a quick coupler 14A that connects the hydraulic pressure controller 9 and the hydraulic pressure outlet T4 of the tractor.

20 is a wheel, 21 is a tire, 22 is a wheel mounting bracket, and 23 is an axle.

Reference numeral 30 denotes a metal fitting for mounting the work machine, which consists of the following items. That is, the pin 3 is attached to the top link bar fitting 32 fixed to the main frame 1 in a bifurcated manner.
Top link bar 3 rotatably attached at 3
1, a lower link fitting 34 fixed to the main frame 1 in a bifurcated manner, and this lower link fitting 3
The lower link block 35 is attached to the lower link block 4 with a slide pin 36.

40 fixes a hitch body 41 to the main frame 1 with a tow hitch, fixes a hitch pin 42 to the hitch body 41, inserts a retaining pin 43 into a mounting hole provided in the hitch body, and attaches a spring 44 to the retaining pin. and attach the string attachment 45 to the spring pin 4.
It is installed on 6.

In the figure, M is a fertilizer spreader, M1 is a hopper, S is a carrier, S1 is a hitch ring, and H is a fertilizer bag. Then, the upper and lower locking parts on the front of the main frame are connected to the top link locking parts of the work machine (Broadcaster in this example) and the left and right lower link pins, and the output shaft of the tractor and the input shaft of the work machine are connected. are connected by a universal transmission shaft, and the quick coupler is connected to a quick coupler that communicates with the tractor hydraulic pressure source.

The procedure for filling fertilizer into the hopper of the Broadcaster is to operate the hydraulic controller, move the support provided on the boom to a position where it can support the fertilizer bag or fertilizer bag, support the fertilizer bag with the support of the crane, and then refill the fertilizer bag. Operate the hydraulic controller to move the fertilizer bag to the top of the hopper input port, open the bottom of the fertilizer bag, and fill the hopper with fertilizer.

After filling the hopper with fertilizer, raise the 3-point link of the tractor, raise the 3-point frame crane with the work equipment attached, move the tractor to the field where the fertilizer will be spread, and transfer the rotary power of the tractor to the work equipment. The fertilizer is transmitted to the field to drive the action part and spray the desired amount of fertilizer onto the field.

In addition, when loading and unloading agricultural materials onto a trailer, the trailer's tow rod is connected to the tow hitch installed at the lower front of the three-point frame crane attached to the three-point link of the tractor, and the materials are moved to the storage area. After operating the hydraulic controller to lift the material with the support of the crane, operate the hydraulic controller again to move and load the material onto the trailer platform.

When unloading, the procedure described above is reversed.

Furthermore, in a configuration in which wheels are provided at the bottom of the main frame, materials can be loaded and unloaded while the three-point frame crane is grounded.

In other words, when lifting heavy materials such as fertilizer bags, the load on the front end of the crane will be greater than the load on the front wheels of the tractor, and with a three-point frame crane that is not equipped with wheels, the front wheels of the tractor will lift up, making work difficult. Although it is possible, the installation of wheels makes it easier to lift these heavy objects.

C Effect of the invention 1 Upper and lower locking parts that engage with the 3-point link of the tractor are provided on the back side of the main frame, and upper and lower locking parts that engage with the 3-point frame of the work equipment are provided on the front side. It is a three-point frame crane with a crane mast installed on the top of the main frame so that it can be rotated and locked, and a boom equipped with a support on the crane mast that can be moved up and down, making it easy to load and unload agricultural materials. In addition to reducing the labor of the workers, loading and unloading work can be done in less space and occupy less space, so there is no need to take precautions such as limiting the storage area for agricultural materials.

In addition, there is no need to invest in expensive equipment such as a tractor with a front loader or a traveling vehicle with a crane in order to reduce the labor of workers, so there is no need to increase the economic burden on farmers.

2. In the configuration in which the three-point frame type crane is provided with wheels, it is possible to work with a smaller tractor than before, and the range of trucks that can be worked on is expanded.

3. In the configuration in which the three-point frame crane is provided with a towing hitch, it becomes possible to load and unload a towing machine such as a trailer connected to the three-point frame crane, and agricultural materials can be easily transported.

[Brief explanation of drawings]

Figure 1 is a side view, Figure 2 is a rear view, Figure 3 is a front view, Figure 4 is an enlarged sectional view of the tow hitch, Figure 5 is a side view showing how the fertilizer spreader is installed, and Figure 6 is a side view.
The figure is a side view showing the towed state of the transport vehicle. A... Crane, 1... Main frame, 2...
...Crane mast, B...Boom, 4...Slide boom, 5, 6...Hydraulic cylinder, 20...Wheel, 30...Work equipment mounting bracket, 40...Tow hit.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An upper locking portion that engages with the top link of the three-point link of the tractor is provided above the back of the main frame, and a pair of left and right lower locking portions are provided below that engages with the lower link. On the other hand, an upper locking portion that engages with the top link locking portion of the three-point frame of the working machine is provided at the upper front, and a pair of left and right lower locking portions that engage with the lower link pin are provided below.
A three-point frame type characterized in that a crane mast is provided approximately in the upper center of the main frame so as to be able to rotate and lock around a vertical axis, and a boom provided with a support is provided on the crane mast so as to be movable up and down. crane. 2. The three-point frame crane according to claim 1, which has wheels provided at the bottom of the main frame. 3. The three-point frame crane according to claim 1 or 2, which is provided with a tow hitch at the front lower part of the main frame.