JPS615200A - Apparatus for transporting earth and sand - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an earth and sand transportation device, and more particularly to an earth and sand transportation device suitable for transporting earth and sand excavated by the face of an excavator.

Belt conveyors were often used in modern times to transport earth and sand within limited areas. However, belt conveyors are not advantageous because they require a large cross-sectional area for transportation and are bulky, and soil in the form of ready-mixed concrete often falls off the belt during transportation, so it is difficult to ensure reliable transportation. The drawback was that it was difficult.

Therefore, in order to transport soil efficiently and reliably,
Attempts have been made to force the earth and sand into the cylinder and transport it through the cylinder. One specific example is to push the earth and sand with a plunger and transport it inside the cylinder. However, since K pushes the earth and sand with the plunger, it is first necessary to feed the earth and sand to the plunger, and this feeding is not easy. In addition, in order to push with a plunger, it is necessary to install pulp at the outlet and inlet of the earth and sand that opens and closes in accordance with the back and forth movement of the plunger, but this valve is expensive and large-scale. However, it had the disadvantage that it could not be installed in limited locations. Therefore, it was necessary to devise yet another device.

In view of the above-mentioned needs, the inventor set out to devise a device for transporting earth and sand efficiently and reliably. Based on the experience of inventing a swing-type material seal conveyor, the inventor thought that it would be possible to apply this to the above-mentioned device. As described in Japanese Patent Publication No. 55-27960, the material seal conveyor has a screw concentrically attached to a steel cylinder so that the screw rotates within the cylinder and can reciprocate in the axial direction. , a consolidation section without a screw is provided at the discharge end of the cylinder, an M is attached to the discharge end of the cylinder, and the lid is pressed against the cylinder end to close the end. This is a device that compacts and transports materials in a compaction section.

The above-mentioned material seal conveyor has a consolidation section without a screw on the discharge end of the cylinder, a lid is attached to the discharge end of the cylinder, and the lid is pressed against the cylinder end to close the end. A mechanism for rotating and reciprocating the screw must be attached to the supply side of the screw. However, if these mechanisms are attached to the supply side of the screw, these mechanisms protrude greatly and the supply occupies a large volume, making it difficult to supply earth and sand to the screw. Therefore, it was necessary to further improve this point.

The gist of this invention is to attach a mechanism for rotating and reciprocating the screw to the earth and sand discharge side.

That is, this F3A is based on the fact that the distal end of the screw is used as the earth and sand supply section, and the base of the screw is provided as the earth and sand discharge section. To this end, the present invention has the screw blades cut out along the base, the dirt passage bent at the cut out part, and the passage wall located on the outside of the bent part extending diagonally across the screw shaft. The main idea is to make the passage wall of the bent part pass through one side of the original cylinder housing the screw, and to provide an earth and sand discharge part beyond that.

In other words, with this invention, a screw is attached concentrically within a #4 cylinder, a rotation mechanism is provided at one end of the screw to rotate the screw around its axis, and a v-node is installed to move the screw reciprocatingly in the axial direction. The tip of the screw is used as the earth and sand supply part, the screw blade is notched at the base of the screw, the earth and sand passage wall is bent at the blade notch, and the earth and sand passage is moved by the screw. The present invention provides an earth and sand transportation device, which is characterized in that the earth and sand is moved away from the earth and sand and is provided with an earth and sand discharge section at its tip.

The present invention will be explained based on the drawings as follows. FIG. 1 is a longitudinal sectional view of an excavator equipped with a transport device according to the present invention. FIG. 2 is an enlarged sectional view of a portion of FIG. 1. FIG. 3 is a partially cutaway enlarged sectional view of another transport device related to this departure J.

In FIG. 1, the blade mouth part a is the bri'i shell or the main body of the excavator, and the blade mouth part a is the directional control jack 1.
This allows it to swing relative to the body of the torso. At the cutting edge part a, the cutting blade 2 located at the tip is rotatable and is designed to cut dirt and drop it into the tip chamber 3. A partition wall 4 is attached to the rear inside the blade mouth part a,
The tip chamber 3 is divided. A door 5 is attached to the partition wall 4, and a viewing window 6 is attached to the door 5.

The earth and sand transport device C according to the present invention is attached to the partition wall 4f: passing through the partition wall 4f and extending from the blade opening a to the main body.

The transportation device C has a structure in which the screw 12 is rotatably supported by a steel cylinder 11 in a cantilevered manner, and is a type of screw conveyor. The base of the screw 12 is on the side of the main body. That is, the screw 12 is rotated around the screw shaft 14 by the rotating and moving device fi13 located inside the main body, and is caused to reciprocate in the direction in which the screw shaft 14 extends, that is, in the direction of the arrow X. The tip of the screw 12 is located within the tip chamber 3, which serves as a supply section. In other words, the screw 12 rotates to transport the soil from the tip to the base of the screw.

A screw blade is cut out at the base of the screw 12. In the notch of the screw blade, there is a passage wall 15 of earth and sand.
and 16 are bent and extend obliquely across the screw shaft 14 on the outer passage wall 15, forming a dirt passage which moves diagonally in cooperation with the inner passage wall 16. The oblique dirt passage extends through one side of the original cylinder 11 housing the screw 12. A discharge portion is provided at the end of the thus bent earth and sand passage. In Figure @1, another pipe 18 is attached to the tip of the bent portion, and the tip thereof serves as a discharge portion.

The purpose of notching the screw blade is to prevent the tip of the screw blade 7) from coming into contact with the outer passage wall 15 and seriously damaging the passage w4 wall 15 when the screw 12 makes a reciprocating motion while rotating. will be used.

Therefore, the screw blades can be provided at a position close to the passage wall 15 when the screw is retracted. In addition, as shown in Figure @1, the screw blade is notched away from the passage wall 15 and a protrusion 17 is provided in its place. It is also possible to prevent dirt from adhering to the surface of the passage wall 15 by scraping it off.

In addition, although FIG. 1 shows the passage walls 15 and 16 curved to form rounded and gently curved surfaces, the passage walls are not limited to such a shape. It may be bent at a right angle or an obtuse angle. Furthermore, the passage walls 15 and 16 do not always need to be separated by the same distance and form corresponding curved surfaces. For example, in FIG. 1, the passage wall 16 may be a rounded curved surface, and the passage wall 15 may be a flat plane bent at a right angle, crossing the screw shaft 14.

In the excavator shown in FIG. 1, the device C according to the invention operates as follows. In the excavator, the cutting blade 2 rotates to cut the earth and sand as described above, and the cut earth and sand is deposited in the supply section of the device C. Then, as the screw 12 rotates, the earth and sand are pushed by the screw blades and pushed into the cylinder 11. The pressed earth and sand is compacted where the screw 12 is not present. The compacted earth and sand is moved forward in the axial direction while the screw 12 rotates.
It is propelled within the cylinder 11. Next, the screw 12 retreats in the axial direction while rotating, so that the propelled earth and sand remains in the same position. In this way, as the screw 12 repeats rotation and forward or backward movement, the earth and sand are propelled and transported within the cylinder 11.

Although a known mechanism may be used as the rotation and movement mechanism 13, a suitable example of the rotation and movement mechanism @13 in the apparatus of this invention is shown in FIG. FIG. 2 shows an example using a rotary torque motor 21. Specifically, when the rod 22 is rotated by the torque motor 21, the piston 24 and the piston rod 25 are rotated via the spline 23 at the end of the rod 22. Since the piston rod 25 is connected to the screw shaft 14, the screw 12 is rotated. Further, the piston 24 is located in the cylinder 26 and reciprocates while being rotated by the spline 23 by alternately applying hydraulic pressure to the retreat port 27 and the advance port 28. In this way, 12 screws are rotated and reciprocated.

As shown in FIG. 3, the rotation and movement mechanism 13 may generate rotational torque by using the force of reciprocating motion without using a torque motor for rotation. To be more specific, a seven flange 31 is attached to the base end of the screw shaft 14, and thrust bearings 32 are attached to the front and rear of this flange to form a swivel machine @33. A casing 34 is attached to the outside thereof, and the casing 34 is attached to a jack head 36 of a reciprocating hydraulic jack 35. Therefore, the jack 35 can reciprocate the screw shaft 14 back and forth without rotating the piston.

A screw thread 37 immediately in front of the swivel mechanism 33 is threaded in the same direction as the pitch of the blades of the screw 12, and a screw nut 38 is fitted into this thread.

A housing 39 is attached to the outer periphery of the nut 38 via a bearing. A ratchet 30 is also attached to one end of the nut 38, and the ratchet 30 allows the nut 38 to freely rotate in one direction, but not in the opposite direction. For example, when facing from the double-acting hydraulic jack 35 toward the screw shaft 14, it can be freely rotated counterclockwise by the ratchet 30, but cannot be rotated clockwise. Therefore, if the blades of the screw shaft 14 are attached to rotate in the same direction as the screw thread 37, when the jack 35 pushes the swivel mechanism 33 to move it forward, the screw nut 38 will rotate counterclockwise and the screw shaft 14 will rotate. It doesn't rotate. However, the jack 35 is swivel mechanism 3.
3, the nut 38 engages the ratchet 30.
Since this prevents clockwise rotation, the screw shaft 14 is rotated counterclockwise via the screw thread 37.

In FIG. 1, a lubricant injection mechanism 19 is a mechanism for press-fitting liquid lubricant. The lubricant may be water alone, but is preferably an aqueous solution of bentonite. In short, the lubricant is water or an aqueous solution in which various substances are dissolved or dispersed, and provides fluidity to the earth and sand. The lubricant injection machine consists of a valve, a pipe connected to the lubricant injection machine, and is used to increase the fluidity of the earth and sand by adding an appropriate amount of lubricant to the earth and sand when the fluidity of the earth and sand is poor. Therefore, when the earth and sand are already highly fluid after being cut, there is no need to inject the lubricant, and the earth and sand are directly fed into the cylinder by the shunting screw and transported within the cylinder. However, since cut earth and sand often have poor fluidity, it is necessary to inject a lubricant, and therefore a lubricant injection mechanism 19 is required.

In the excavator shown in FIG. 1, while the earth and sand are moving inside the steel cylinder 11, lubricant is injected from the lubricant injection mechanism 19 according to the properties of the earth and sand, and is stirred by the screw 12, so that the earth and sand are completely removed. It is considered to have a moderate fluidity i1σ1. The earth and sand, which has been given appropriate fluidity, is propelled by the rotation and reciprocating motion of the screw, and is moved to the cylinder 1 where there are no screw blades.
Example of the forward force of the following earth and sand. In this way, the earth and sand can travel through the even longer steel cylinder 18 connected to the cylinder 11, and will eventually be efficiently transported within the cylinder over a long distance.

Although FIG. 1 shows a structure in which the screw 12 protrudes beyond the steel cylinder 11 at the tip end, the protrusion of the screw 12 is not necessarily necessary. screw 12
The tip of the tube may be retracted into the cylinder 11, and a hopper may be provided there to constitute a supply section.

According to the device of this invention, a screw is attached concentrically within a steel cylinder, and a rotation mechanism for rotating the screw around its axis and a movement mechanism for alternately reciprocating the screw in the axial direction are provided. Since it is attached to the screw, the screw can be rotated and reciprocated within the cylinder, and therefore earth and sand can be easily and reliably fed and moved forward. In addition, since the tip of the screw is used as the earth and sand supply section, there is no mechanism that protrudes from the tip, making it easy to feed the cut earth and sand into the supply section, making it convenient to use. Furthermore, the screw blades were notched at the base of the screw, the earth and sand passage wall was bent at the blade notch, the earth and sand passage progressed away from the screw, and an earth and sand discharge part was provided at the end.
The earth and sand can be easily discharged from the discharge part without the screw blades damaging the earth and sand passage walls. The device of this invention provides such conveniences.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an excavator equipped with a transport device according to the present invention. FIG. 2 is an enlarged sectional view of one part in FIG. 1. Figure 3 shows this issue 11. It is a partially cutaway enlarged sectional view of another transport device related to INK. In the figure, 11 is a steel cylinder, 12 is a screw, and 13 is a steel cylinder.
Rotating and moving mechanism, 14 screw shafts, 15 and 1
6 is a passage wall made of earth and sand.

Claims (1)

[Claims] A screw is installed concentrically within a steel cylinder, and one end of the screw is equipped with a rotation mechanism for rotating the screw around its axis and a movement mechanism for reciprocating the screw in the axial direction. The tip is used as the earth and sand supply part, the screw blade is cut out at the base of the screw, the earth and sand passage wall is bent at the blade notch, the earth and sand passage is advanced away from the screw, and the earth and sand is discharged to the end. An earth and sand transportation device characterized by having a section.