JPS6223890Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Application Field) The present invention relates to a trench excavator, and for example, to a so-called auger trencher for opening a culvert drainage ditch or an open culvert drainage ditch.

(Prior Art) Conventionally, as this type of trench excavator, the structure described in, for example, Japanese Utility Model Application Publication No. 154603/1983 is known. The structure described in this publication is such that an extended rotation shaft mounted on a drilling tip or a bearing body is exchangeably attached to the joint of the lower end of the rotation shaft with a spiral blade attached to the outer periphery. It is something.

When a drilling tip is attached to the joint of the rotating shaft, it becomes a hole digging device, and when an extended rotating shaft is attached to the joint of the rotating shaft, it becomes a spiral groove making device.

(Problems to be solved by the invention) According to the structure described in the above-mentioned publication, the helical groove cutting device is constructed only by attaching the extended rotation shaft to the coupling part of the rotation shaft. Therefore, there is a problem with the spiral trench cutting device in that it can only open drainage trenches of a predetermined depth.

On the other hand, in order to further improve the drainage function, for example, when it is necessary to form a drainage ditch deeper than the above-mentioned drainage ditch around the field outside the above-mentioned drainage ditch, conventionally, an auger trench for forming a shallow drainage ditch is used. There is a problem that at least two auger trenchers, an auger trencher and an auger trencher for forming deep drainage channels, are required, which is extremely uneconomical.

Therefore, the present invention was developed in view of these points, and is designed so that an extension shaft having an extended spiral blade continuous to the spiral blade body can be detachably attached to one end of the rotating shaft having a spiral blade body. By attaching and detaching the extension shaft with the extended helical blade as appropriate, a single auger trencher can selectively open drains to the desired depth according to the work conditions, making it extremely economical. The purpose of this invention is to provide a trench excavator with a high level of functionality.

[Structure of the idea]

(Means for Solving the Problems) The trench excavator of the present invention has a spiral blade body attached to the lower part of the machine frame for cutting and lifting soil while rotating the soil in the vertical direction of the outer periphery, and has a connecting part at the lower end. A rotating shaft is provided vertically, and a column located behind this rotating shaft and having a connecting part at the lower end is fixed to the lower rear end of the machine frame, and the rotating shaft is connected to the upper middle part of the floor plate. A connecting shaft is provided at the upper and lower positions of the floor plate, and an extension shaft having an extended spiral blade that continues to the spiral blade body in the vertical direction of the outer periphery is detachably provided on the connecting shaft, and the upper rear end of the floor plate Connecting pieces are provided at upper and lower positions of the connecting portion of the support column to be detachably connected.

(Function) According to the trench digging machine of the present invention, first, when opening a deep drainage ditch, an extension shaft having an extended spiral blade is fitted to the connection shaft of the floor plate, and the upper part of this connection shaft is It is connected to the lower end of the rotating shaft, and the upper part of the connecting piece of the floor plate is connected to the connecting part of the column.

As a result, an extension shaft having an extension spiral blade is interlocked and connected between the floor plate and the rotating shaft via the connection shaft, and the upper edge of the extension spiral blade of this extension shaft is connected to the lower edge of the spiral blade body. An auger is constructed of a series of long helical blades that are successively engaged and are comprised of this helical blade body and an extended helical blade.

In addition, when opening a shallow drainage ditch, the connecting piece of the floorboard is separated from the connecting part of the column, the connecting shaft is separated from the rotating shaft, and the extension shaft having an extended helical blade is removed from the connecting shaft. Then, the connecting piece of the floorboard is again deeply inserted and connected to the connecting part of the support column, and the connecting shaft is connected, for example, deeply to the connecting part of the rotation shaft.

As a result, a relatively short spiral blade auger consisting of a spiral blade body is constructed.

By attaching and detaching the extension shaft having the extended helical blade in this way, an auger is constructed which opens a shallow drainage ditch or a relatively deep drainage ditch with a predetermined width.

(Embodiment) Hereinafter, the structure of an embodiment of the present invention will be described based on the accompanying drawings.

Reference numeral 1 denotes a machine frame, and a transmission 3 having an input shaft 2 is attached to an intermediate portion of the machine frame 1. Further, connecting frames 4 and 5 as machine frames are attached to both ends of this machine frame 1, and connecting pieces 4a and 5 are protruded in parallel to each other in front of the connecting frames 4 and 5.
Lower pins 6, 7 are protruded from the tips of the connecting pieces 4a, 5a, masts 8, 9 are erected between the connecting pieces 4a, 5a, and connecting parts 10 are formed at the upper ends of the masts 8, 9 close to each other. has been done. Further, one end of a connecting piece 11 is connected to the adjacent upper part of the masts 8 and 9 by a bolt/nut 12, and this connecting piece 1
The other end of 1 is connected to a protrusion 13 projecting from the case body of the mission 3 by a bolt/nut 14. Further, a connecting protrusion 4b protruding parallel to the rear of the connecting frames 4, 5,
The upper end of the support column 15 to which a strength face plate (not shown) to prevent the cut soil from collapsing backward is fixed between 5b and 5b is fixed by bolts and nuts 16.
A plurality of mounting holes 18 for height adjustment are formed above and below a connecting portion 17 formed at the lower end of this support column 15 .

Reference numeral 19 denotes an auger, and this auger 19 has a vertically disposed hollow rotating shaft 20, and a spiral blade body 21 that controls the cutting and soil lifting action is arranged in a spiral shape on the outer circumference of the rotating shaft 20 in the vertical direction. The upper end 21a of the spiral blade body 21 is wound on one side of the earth removal blades 22 which are provided perpendicularly on both upper sides of the rotation shaft 20. Further, a mounting flange 23 is integrally formed on the upper end of the rotation shaft 20, and a plurality of through holes 24 are formed above and below the hollow lower end of the rotation shaft 20 as a connecting portion. It is made up of perforations. Then, the flange 23 at the upper end formed on the rotating shaft 20 of this auger 19 is engaged with the flange 26 formed on the output shaft 25 of the mission 3 which projects downward from the above-mentioned mission 3, thereby causing a plurality of flange 23 to be engaged with each other. It is fixed by bolts and nuts 27.

Further, reference numeral 28 denotes a floor plate having a sharp cutting blade 29 at its tip, and the above-mentioned support 1 is attached to the upper rear end of this floor plate 28.
A pair of connecting pieces 30 that sandwich the connecting part 17 of No. 5 from both sides are erected facing each other, and the pair of connecting pieces 30
A communication hole 31 communicating with the mounting hole 18 is bored in the upper part of the holder. Further, a bearing 32 is fixed to the middle upper part of the floor plate 17, and the lower end of a connecting shaft 34 having a plurality of protrusions 33 at regular intervals in the vertical direction on the outer circumference is rotatably erected on the bearing 32. The connecting shaft 34 is inserted into the rotating shaft 20 of the auger 19 so as to be able to move forward and backward, and a communication hole 35 communicating with the plurality of through holes 24 of the rotating shaft 20 is bored at its upper end.

Reference numeral 36 denotes a hollow cylindrical extension shaft that is inserted into and removed from the connecting shaft 34 and whose upper end is connected to the lower end of the rotation shaft 20. The extension shaft 36 has a hollow portion that engages with the plurality of protrusions 33. A plurality of locking protrusions 37 are formed in the vertical direction, and an extended spiral blade 38 continuous to the spiral blade body 21 is spirally wound on the outer periphery of the extended shaft 36 in the vertical direction. It is fixed in one piece.

Next, a mounting board 3 in which the output shaft 25 is rotatably inserted into the lower part of the case body of the transmission 3 is installed.
9 is fixed, and a top plate 42 of a guide body 41 formed in a cylindrical shape as a whole is engaged with this mounting board 39 via a plurality of bolts 40.
A nut 44 is screwed onto the 0 via a coil spring 43.

Further, a horizontal discharge port 46 is formed on one side of the cylindrical body 45 of the guide body 41, and the spiral blade body 2
1 and the outer periphery of the earth removal blades 22 are covered,
The cut soil discharged by the soil discharge blades 22 is discharged through a discharge port 46 horizontally projecting from one side of the cylindrical body 45.
It is beginning to be emitted from

Next, the operation of the above structure will be explained.

First, when opening a deep drainage ditch, first
An extension shaft 36 having an extension spiral blade 38 is fitted onto the connection shaft 34 of No. 8, and the upper part of this connection shaft 34 is fitted into the lower end of the rotation shaft 20,
The connecting portion 17 of the support column 15 is connected between the pair of connecting pieces 30 of 8.
Insert. A bolt 47 is inserted into the through hole 24 and the communication hole 35 at a predetermined position, which communicate with each other, and a nut is screwed therein, and a bolt 48 is inserted into the communication hole 31 and the mounting hole 18 at a predetermined position, which communicate with each other. Then screw Natsuto onto it.

As a result, as shown in the solid line in Fig. 1, the floor plate 2
8 is held horizontally, and this floor plate 28 and the rotation shaft 2
0, an extended spiral blade 38 is connected via a connecting shaft 34.
The extended spiral blade 38 of this extended shaft 36 is interposed and interlocked, and the upper end edge of the extended spiral blade 38 of this extended shaft 36 is continuously engaged with the lower end edge of the spiral blade body 21. The auger 19 is composed of a series of long spiral blades including an extended spiral blade 38, and is configured to cut soil with the spiral blades and to lift and transport the cut soil.

Also, when opening a shallow drainage ditch, bolt 4
7, 48 and connect the pair of connecting pieces 3 of the floor plate 28.
0 from the connecting portion 17 of the support column 15, and from the connecting shaft 34
are separated from the rotating shaft 20 and extend from the connecting shaft 34 to an extension shaft 36 having a spiral blade 38 extending therefrom.
remove it. Then, again, the connecting portion 17 of the support column 15 is deeply inserted between the pair of connecting pieces 30 of the floor plate 28 and held from both sides, and the lower end of the rotating shaft 20 is deeply inserted into the connecting shaft 34, that is, 1st
As shown by the chain line in the figure, the floor plate 28 is mounted close to the support column 15 and the rotation shaft 20 by the height of the extension shaft 36, and bolts 47 are inserted into the through holes 24 and communication holes 35 at predetermined positions that communicate with each other. through which a nut is screwed, and a communicating hole 3 that communicates with each other.
1 and a bolt 48 is inserted into the mounting hole 18 at a predetermined position, and a nut is screwed into the bolt 48. As a result, floor plate 2
Reference numeral 8 is a relatively short spiral blade auger 19 which is held horizontally and consists of a spiral blade body 21, and is constructed so that the soil is cut by this spiral blade and the cut soil is lifted and transferred. be done.

Next, the three-point link mechanism of the tractor is connected to the lower pins 6, 7 of the connection frames 4, 5 and the connection parts 10 of the masts 8, 9, respectively, and the power take-off shaft of the tractor is connected to the input shaft 2, and the power transmission shaft is connected to the input shaft 2. Interlocking and connecting via. Then, the trench excavator is towed by a tractor, and the transmission 3 is driven by the power input to the input shaft 2, and the auger 19 is driven via the output shaft 25 of the transmission 3.

As a result, the relatively hard soil in the lower layer is cut almost horizontally along the advancing direction by the sharp tip of the floorboard 28, and the spiral blade 21 of the rotating auger 19 or the spiral blade 21 and the extended spiral The soil is cut and lifted by the spiral blade consisting of the blade 38, and therefore the spiral blade body 21 or the spiral blade body 21 and the extended spiral blade 3
The soil is sequentially and continuously lifted up and transferred into the guide body 41 by the spiral blades 8, and is further moved from the discharge port 46 of the guide body 41 to the side part in the direction of movement by the soil removal blades 22. is left alone. By attaching and detaching the extension shaft 36 having the extended helical blade 38 in this way, a shallow drainage ditch or a relatively deep drainage ditch with a predetermined width can be easily established.

[Effect of the invention] According to the invention, when the extension shaft having the extension spiral blade is attached to the connection shaft of the floor plate, the connection shaft of the floor plate is connected to the connection part of the rotation shaft having the spiral blade body, and By connecting the connecting piece of the floor plate to the connecting part of the support column, it is possible to easily construct an extended trench digging machine for opening deep drainage ditches consisting of a spiral blade body and an extended spiral blade. In addition, with the extension shaft with the extension spiral blade removed from the floor board connection shaft,
By deeply connecting the connecting shaft of this floor plate to the connecting part of the rotating shaft, and the connecting piece of this floor plate to the connecting part of the pillar, a shallow drainage ditch opening groove formed by the spiral blade of the rotating shaft can be created. The excavator can be easily configured.

Therefore, by appropriately attaching and detaching the extension shaft with an extended spiral blade and changing and setting the working depth of the spiral blade, it is possible to selectively create a drainage ditch with a desired depth according to the working conditions with one machine. Moreover, it is possible to easily open trenches, and there is no need to prepare a plurality of machines with different working depths, so it is possible to provide an extremely economical trench digging machine.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of a trench excavator, Fig. 2 is a plan view of the same, and Fig. 3 is an extension shaft equipped with an extended helical blade. FIG. 3 is an exploded perspective view showing the attachment mechanism. 1, 4, 5... Machine frame, 15... Support, 17...
Connection part, 19...Auger, 20...Rotation shaft, 21
... Spiral blade body, 24 ... Connection part, 28 ... Floor plate,
30... Connection piece, 34... Connection shaft, 36... Extension shaft, 38... Extension spiral blade.

Claims (1)

[Scope of utility model registration request] A machine frame, a rotating shaft provided vertically at the bottom of the machine frame, a rotating shaft having a connecting part at the lower end, and a spiral blade body that cuts and lifts soil while rotating it up and down on the outer periphery; A column located behind the shaft and fixed to the lower rear end of the machine frame and having a connecting portion at the lower end, and a connecting shaft at the upper intermediate portion that is removably connected to the upper and lower positions of the connecting portion of the rotating shaft. Moreover, an extension shaft having an extended spiral blade continuous to the spiral blade body in the vertical direction of the outer periphery is removably provided on the connecting shaft, and a connecting piece is provided at the upper rear end of the connecting shaft to connect to the upper and lower positions of the connecting part of the support column in a removable manner. A trench excavator characterized by comprising a floor plate provided with.