JPH0716772Y2 - Mounting structure for vertical shaft excavator blades - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a cutting tool for a vertical shaft excavating machine capable of improving work efficiency.

[0002]

2. Description of the Related Art Vertical shafts are constructed in advance for civil works such as tunnels. As the shaft excavating machine used for the construction work of this shaft, the shaft excavating machine shown in FIGS. 6 and 7 is known. In this shaft construction machine, a drum cutter 101 and a ring cutter 102 are installed at the lower end of a machine body 100, and a drum cutter 10 is driven by driving an underwater motor 103.
1 and the ring cutter 102 are driven to excavate the ground, and the excavated earth and sand is sucked upward by the drive of the submersible pump 104 and discharged to the outside.

As shown in FIG. 8, the drum cutter 101 has adapters 108 fixed to a peripheral surface 107 of a drum 106 at regular intervals, and excavator blades 109 are attached to the adapters 108. As shown in FIG. 9, this excavating machine blade 109 has a shank 110 with a cemented carbide 11
1 is welded to form a cutting edge portion 112, and a pin 1 is attached to a mounting hole 114 formed in a shank portion 113 of a shank 110.
15 is inserted and attached to the adapter 108.

In the excavating machine blade 109, the cutting edge angle of the cemented carbide 111 depending on the type or hardness of rock is 0 ° to + 15 °, as shown in FIG.
Alternatively, as shown in FIG. 11, two kinds of ones, which are set to 0 degrees to -5 degrees, are used properly. The excavator blade 109 shown in FIG. 10 is generally used for excavation work from soft rock to medium hard rock, and when this excavator blade 109 is used to excavate medium rock to hard rock, As shown in FIG. 12, only the tip portion is worn out and cannot be used.

For this reason, the excavation machine blade 109 having the cutting edge angle shown in FIG. 11 is replaced and the worn portion is increased as shown in FIG.

[0006]

According to the above-mentioned prior art, in excavation work, two types of cutting tools 109 for excavating machines are used, in which the cutting edge angle of the cemented carbide 111 is changed depending on the type or hardness of rock. For this reason, the excavation machine blade 109 must be replaced during excavation work, resulting in a decrease in work efficiency. Further, it is uneconomical to prepare two types of cutting tool blades 109.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an economical tool mounting structure for a shaft excavating machine which can improve work efficiency.

[0008]

In order to solve the above problems, the present invention mounts an adapter on the peripheral surface of a rotationally driven drum, mounts an excavating blade in the mounting hole of the adapter, and installs the excavating blade. In a structure for mounting a cutting tool for a vertical shaft excavating machine for building a shaft by advancing a drum equipped with to the ground and excavating the ground, the cutting tool is inserted into a mounting hole of the adapter through a sleeve, and the sleeve The center axis of the blade insertion hole of is formed by changing the angle in the circumferential direction of the drum with respect to the center axis of the sleeve mounting hole of the adapter, and the sleeve is turned in the rotation direction and the counter rotation direction of the drum. It is formed so that it can be attached to the adapter, and by changing the direction of the sleeve, the cutting edge angle of the excavating machine blade attached to the sleeve can be changed.

[0009]

Operation: The excavating blade is inserted into the mounting hole of the adapter through the sleeve. Since the center axis of the blade insertion hole of the sleeve is formed by changing the angle in the circumferential direction of the drum with respect to the center axis of the sleeve mounting hole of the adapter, when the cutting tool is inserted into the sleeve, The excavating blade is installed tilted by the angle. Then, when the excavating blade becomes worn, the direction of the sleeve is reversed and the excavating blade is mounted. In this way, excavation work can be continued without replacing one type of excavation blade.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 3, reference numeral 1 denotes a drum of a vertical shaft building machine, and a plurality of adapters 2 are attached to a peripheral surface of the drum 1. This adapter 2 has a drum 1
A sleeve mounting hole 3 having a predetermined diameter is formed in the radial direction of.

Reference numeral 4 denotes a sleeve which is inserted into and supported by the sleeve mounting hole 3. The sleeve 4 has a central axis P of the blade insertion hole 5 of the sleeve 4 with respect to a central axis O of the sleeve mounting hole 3. The drum 1 is formed so as to be displaced by a predetermined angle θ in the circumferential direction.

An excavation blade 6 is inserted into and attached to the blade insertion hole 5 of the sleeve 4.
Is formed by welding a cemented metal 8 to the tip of the shank 7 to form a blade edge portion 9. The pin 12 is inserted into the mounting hole 11 formed in the shank portion 10 of the shank 7 and is attached to the adapter 2 together with the sleeve 4. ing. When the direction of the hard metal 8 of the excavating blade 6 is oriented in the rotation direction of the drum 1, the blade angle of the hard metal 8 is set to 0 ° to + 15 °.
When the direction of is directed to the counter-rotational direction of the drum 1, the hard metal 8
The cutting edge angle of is set to 0 to -5 degrees.

According to the above construction, when used for excavation work from soft rock to medium hard rock, as shown in FIG.
The direction of the cemented carbide 8 of the excavating blade 6 is oriented in the direction of rotation of the drum 1. When the excavating blade 6 is inserted into the sleeve 4, the central axis P of the blade insertion hole 5 of the sleeve 4 is formed so as to be displaced from the central axis O of the sleeve mounting hole 3 in the circumferential direction of the drum 1 by a predetermined angle θ. Therefore, the excavating blade 6 is attached with an inclination of a certain angle (see FIG. 4). When used for excavating medium-hard rock to hard rock, as shown in FIG. 3, the direction of the cemented carbide metal 8 of the excavating blade 6 is oriented in the counter-rotational direction of the drum 1. As a result, the blade angle of the cemented carbide 8 is set to 0 to -5 degrees, so that the wear of the excavating blade 6 can be suppressed. On the other hand, as shown in FIG.
When the direction of the hard metal 8 of the excavating blade 6 is used in the direction of rotation of the drum 1 and the excavating blade 6 is worn and the clearance angle α is reduced, the sleeve 4 is rotated toward the drum. It is reversed so as to be opposite to the direction and inserted into the sleeve mounting hole 3 of the adapter 2. In this way, when the excavation blade 6 is attached to the blade insertion hole 5 of the sleeve 4, the clearance angle α is secured again and the excavation blade 6 can continue excavation with the blade tip 9 protruding (see FIG. 5). . In this way, excavation work of different rock masses can be performed with only one type of excavating blade 6, so that work efficiency can be improved and it is economical.

[0015]

As described above, according to the mounting structure of the cutting tool for a vertical shaft excavating machine according to the present invention, the adapter is mounted on the peripheral surface of the rotationally driven drum, and the cutting tool is mounted in the mounting hole of the adapter. In the mounting structure of a shaft for an excavating machine for mounting a drum equipped with this excavating blade in the ground to construct a shaft by excavating the ground, mounting the adapter for the excavating blade via a sleeve The sleeve is inserted into the hole, the central axis of the blade insertion hole of the sleeve is formed by changing the angle in the circumferential direction of the drum with respect to the central axis of the sleeve mounting hole of the adapter, and the sleeve is rotated counter to the rotational direction of the drum. Since it is formed so that it can be attached to the adapter by changing the direction respectively, the angle of the cutting edge of the excavating machine blade attached to the sleeve can be changed by changing the direction of the sleeve. Is very economical because it can further be used by changing the edge angle in cutlery clearance angle is low due to wear of the cutting edge it is possible to perform different rock drilling operations only drilling tool of the kind.

[Brief description of drawings]

FIG. 1 is an exploded view showing a tool for a shaft excavating machine according to an embodiment of the present invention, which is disassembled from a drum.

FIG. 2 is an assembly diagram in which the shaft excavating machine blade of FIG. 1 is assembled to a drum.

FIG. 3 is an exploded view showing the sleeve of FIG. 1 in an inverted state.

FIG. 4 is a conceptual diagram showing a worn state of a cutting tool for a vertical shaft excavating machine in the assembly mode of FIG. 1.

5 is a conceptual diagram showing a worn state of a tool for a vertical shaft excavating machine in the assembly mode of FIG.

FIG. 6 is a front view showing the shaft excavating machine.

FIG. 7 is a side view showing the shaft excavating machine.

FIG. 8 is a conceptual diagram showing a drum of a vertical shaft excavating machine.

FIG. 9 is a conceptual diagram showing a conventional shaft excavating machine blade.

FIG. 10 is a conceptual diagram showing a conventional shaft excavating machine blade.

FIG. 11 is a conceptual diagram showing different types of conventional shaft excavating machine blades.

FIG. 12 is a conceptual diagram showing a worn state of a cutting tool for a vertical shaft excavating machine in the assembling mode shown in FIG.

FIG. 13 is a conceptual diagram showing a worn state of a cutting tool for a vertical shaft excavating machine in the assembly mode shown in FIG. 11.

[Explanation of symbols]

 1 Drum 2 Adapter 3 Sleeve mounting hole 4 Sleeve 5 Blade insertion hole 6 Drilling blade 7 Shank 8 Carbide metal 9 Blade tip 12 pins

Claims (1)

[Scope of utility model registration request] 1. An excavator for excavating the ground by mounting an adapter on a peripheral surface of a rotary driven drum, mounting an excavating blade in a mounting hole of the adapter, and advancing the drum equipped with the excavating blade into the ground. In the mounting structure of a tool for a shaft excavating machine for constructing a shaft, the cutting tool is inserted into a mounting hole of the adapter through a sleeve, and a central axis of the blade insertion hole of the sleeve is a sleeve mounting hole of the adapter. The sleeve is formed by changing the angle in the circumferential direction of the drum with respect to the center axis of the drum. A mounting structure for a cutting tool for a vertical shaft excavating machine, wherein a cutting edge angle of the cutting tool for an excavating machine mounted on a sleeve can be changed by changing the angle.