JPH026158Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of an earth removal gate for a shield excavator, and in particular, the invention relates to an earth removal gate structure for a shield excavator, and in particular, the earth removal gate is configured by a plurality of rod-shaped gate members that can be slid open and closed. The present invention relates to a structure of an earth removal gate for a shield excavator in which the opening width of the earth removal port and the size of the opening gap can be freely adjusted.

[Prior Art] A flat slide gate is generally used as an earth discharge gate for opening and closing an earth discharge port of a shield excavator. That is, as shown in FIG. 7, the slide gate is provided with a gate plate b that can be slid open and closed to partition the soil discharge port a, and the opening height c is adjusted according to the gravel and soil quality.

[Problems to be solved by the invention] However, in the above soil discharge gate structure, the opening width d
cannot be adjusted, so if a cobblestone e is caught,
There was a drawback that a large gap f was formed, which could lead to an accident in which sand and water erupted.

Incidentally, since the slide gate is generally opened and closed by a hydraulic jack, there is a problem in that if the hydraulic system breaks down, the soil discharge port cannot be closed.

[Purpose of the invention] The present invention was made to solve the problems of the prior art described above, and its purpose is to be able to adjust not only the opening height of the soil discharge port but also the opening width, and to reduce the opening gap between the bar-shaped gate members. To provide an earth removal gate structure for a shield excavator, which can be freely adjusted, can be easily taken out without creating a gap even if cobbles are caught, and can be easily opened and closed manually. be.

[Summary of the invention] In order to achieve the above object, the present invention is such that a plurality of bar-shaped gate members are arranged close to each other in the soil discharge port to partition the gate, and each gate member is provided so as to be able to slide open and close. .

[Example] An example of the present invention will be described below in detail based on the accompanying drawings.

As shown in FIG. 1, a cylindrical shield frame 1
A cutter 2 is rotatably provided at the front end of the cutter.
A cutter chamber 3 for taking in excavated soil is formed on the rear side of the cutter 2, and a screw conveyor 5 is connected to a bulk head 4 that partitions this cutter chamber 3, and a screw conveyor 5 communicates its entrance 6 with the inside of the cutter chamber 3. It is attached with the unloading end 7 facing rearward in the excavation direction and extending.

The screw conveyor 5 in this embodiment is of a type having a soil discharge port 8 in the axial direction, and the soil discharge port 8 is provided with a normal slide gate 9 and a gate according to the present invention located on the rear side. 10
is provided. As shown in FIGS. 2 and 3, this gate 10 is constructed by arranging a plurality of bar-shaped gate members 11 close to each other to partition the soil discharge port 8, and providing each bar-shaped gate member 11 so as to be slidable to open and close. There is. The cross section of the bar-shaped gate member 11 may be circular, elliptical, polygonal, rectangular, triangular, or the like.

The soil discharge port 8 is formed into a rectangular shape by a casing 12, and insertion holes 14 are formed in the upper side 13 of the casing 12 at appropriate intervals in the width direction for slidably inserting the bar-shaped gate member 11. There is. That is, the bar-shaped gate members 11 are designed to fall under their own weight until their lower ends abut against the lower side 15 of the casing 12, thereby closing the soil discharge port 8.
As a means for holding the bar-shaped gate member 11 in an upwardly opened state, a pin hole 17 is formed on the lower side of the bar-shaped gate member 11, into which an insert pin 16 is inserted and removed. Attach the insertion pin 16 to the upper side 1 of the casing 12.
By hooking the gate member 3 on the bar-shaped gate member 11, the bar-shaped gate member 11 can be supported in an open state.

Next, we will discuss the effect. The method of operating the soil discharge gate includes a method of opening and closing only the slide gate 9 with all the bar-shaped gate members 11 in an open state, and a method of opening and closing only the slide gate 9 by lowering the bar-shaped gate members 11 one by one or several bar-shaped gate members 11. There are a method of opening and closing the slide gate 9 with the opening gap set to a desired width, a method of opening and closing the slide gate 9, and a method of adjusting the opening gap by inserting and removing the bar-shaped gate member 11 with the slide gate 9 in an open state.

For example, as mentioned above, all rod-shaped gate members 11
In the method of operating the slide gate 9 with the slide gate 9 in the open state, if a boulder gets caught in the slide gate 9, the pin hole 17 of the bar-shaped gate member 11
The earth discharge port 8 may be closed by removing the insert pin 16 and lowering the bar-shaped gate member 11 by its own weight. If the bar-shaped gate member 11 is difficult to close due to the resistance of earth and sand, it is closed by hammering or the like.

As a result, the soil discharge port 8 is closed by the rod-shaped gate member 11 as shown in FIG. 4, for example, and no gap is created unlike the slide gate 9, so that an accident of spouting of soil and sand water does not occur. In addition, by opening the slide gate 9 and bar-shaped gate member 11 that are holding the cobble E in this state, the cobble E can be easily taken out.

To open the closed bar-shaped gate member 11, pull them up one by one and insert them into each pin hole 1.
7 by inserting the insert pin 16, and the bar-shaped gate member 11 can be made lightweight, so that the opening operation can be easily performed.

Further, as described above, since the bar-shaped gate member 11 can be easily opened and closed manually, even if the hydraulic system of the slide gate 9 or the like breaks down, the bar-shaped gate member 11 can be opened and closed, improving safety.

In the above embodiment, the case where the soil discharge port 8 is formed in the axial direction of the screw conveyor 5 was explained, but as shown in FIG. 5, the soil discharge port 8 is formed in the radial direction of the screw conveyor 5. Moreover, it does not necessarily have to have the slide gate 9.

Furthermore, it goes without saying that the present invention can also be applied to a shield excavator of the type in which the earth discharge port 8 is formed directly in the bulkhead 4 as shown in FIG.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

(1) Since the gate is formed by arranging multiple bar-shaped gate members, it is possible to adjust not only the opening height but also the opening width of the soil discharge port by simply sliding the bar-shaped gate members to open and close as appropriate. The opening gap between the gate members can also be freely adjusted, and even if gravel is caught, the gravel can be easily taken out without creating a gap, thereby preventing an accident from blowing out earth and sand.

(2) Since the bar-shaped gate members can be opened and closed individually, they can be opened and closed easily and reliably with a light force, improving safety.

(3) Since the structure is simple, it is easy to manufacture, has few failures, and can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of a shield excavator showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the earth removal port, Fig. 3 is a front view of the same, and Fig. 4 is a bar-shaped gate member. FIGS. 5 and 6 are schematic sectional views showing modifications applied to different types of shield excavators, and FIG. 7 is a front view showing a conventional earth discharge gate structure. In the figure, 8 is a soil discharge port, and 11 is a rod-shaped gate member.

Claims (1)

[Scope of utility model registration request] A shield characterized in that a plurality of bar-shaped gate members are arranged close to each other to partition the earth discharge port of a shield excavator that transports excavated earth backward in the direction of excavation, and each of them is provided so as to be able to slide open and close. Earth excavation gate structure of excavator.