JPH0718629Y2 - Earth and sand hopper - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sand hopper for loading excavated earth and sand on a so-called dump truck or the like.

[Conventional technology]

In recent years, when excavating a tunnel, a shield construction method has been widely adopted, and particularly, a mud pressure shield construction method and an earth pressure type shield construction method have been remarkably developed. In these shield construction methods, the earth and sand excavated at the tip of the shield excavator is taken out behind the shield excavator by a mud pump or screw conveyor, and then the earth and sand are dehydrated and put into the earth and sand hopper, It is designed to be loaded onto a dump truck from a hopper.

[Problems to be solved by the device]

However, the excavated soil, that is, the residual soil is not only sandy but also clayey with high viscosity. If the residual soil is clay, the residual soil thrown into the sediment hopper adheres to the inner surface of the hopper, causing the arch phenomenon due to the residual soil itself to clog the hopper and prevent the residual soil from being discharged. Often things have to be done, which is a cause of reduced work efficiency.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and is capable of preventing clogging of the hopper and scraping off the sediment on the inner wall below the vertical wall. Is intended to provide.

[Means for Solving the Problems]

In order to achieve the above object, the earth and sand hopper according to the present invention is a earth and sand hopper having a hopper body in which an inclining slanted wall is continuously provided below the vertical wall, and the rod is directed downward. And a cylinder that is rotatable in the center of the hopper body, is fixed to the vertical wall that covers the upper portion of the cylinder, and has a gap between the cylinders to allow the cylinder to rotate. A cover for restricting the amount of rotation of the cylinder, and a scraping plate eccentrically attached to the rod so as to be eccentric to the center of the hopper body and swingably attached, and a scraping plate that moves up and down along the inclined surface are provided. There is.

[Action]

According to the present invention configured as described above, when the cylinder provided on the vertical wall in the hopper body is operated to extend the rod, the scraping plate provided at the tip of the rod slides down the inwardly inclined wall below the vertical wall. Scrape off the soil (remaining soil) on this surface. Since the cylinder rotates toward the center of the hopper body as the scraping plate descends, the rod is extended without interfering with the inwardly inclined surface, and the scraping plate is located near the lower opening of the hopper. Down to prevent the formation of arches due to sediment and eliminate clogging of the hopper. Further, the cover fixed to the vertical wall restricts the rotation amount of the cylinder to prevent the scraping plate from being largely separated from the wall surface of the hopper, and prevents the scraping effect of the soil from being deteriorated. Therefore, the remaining soil cannot be discharged due to the clogging of the hopper, the propulsion of the shield excavator is not interrupted, and the efficiency of excavation work can be improved.

〔Example〕

A preferred embodiment of the earth and sand hopper according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of the earth and sand hopper according to the present invention.

In FIG. 1, the earth and sand hopper 10 includes an upper rectangular portion 14 having a vertical wall surface of a hopper body 12 and a lower truncated pyramid portion 16 having an inwardly inclined wall surface continuously provided below the rectangular portion 14.
And (see FIGS. 2 and 3). A plurality (six in the case of the embodiment) of scraping machines 18 are provided on the inner wall surface of the upper rectangular portion 14. The scraping machine 18 includes a hydraulic jack 20 having a rod pivoted downward, and earth and sand (remaining soil) attached to the tip of the rod of the hydraulic jack 20.
It consists of a scraping plate 22 for scraping off the scraping plate, and by driving the hydraulic jack 20, the scraping plate 22 is lowered to near the lower opening 23, and the residual soil adhering to the inner wall surface of the hopper body 12 is scraped off. You can do it.
Further, the upper portion of the hydraulic jack 20 is covered with a cover 25, which prevents the hydraulic jack 20 from being covered with earth and sand, and regulates the rotation amount of the hydraulic jack 20 pivotally attached to the scraping plate as described later. 22 is prevented from separating from the inner wall surface of the hopper body 12.

As shown in FIG. 4, the hydraulic jack 20 is provided with an eccentric head 30 at the tip of a rod 28 that advances and retreats with respect to the cylinder 24 as shown by an arrow 26, and this head 30 has a universal joint 32 formed of a ball joint. A scraping plate 22 is attached via. Therefore, the scraping plate 22 can be inclined at an arbitrary angle with respect to the plane orthogonal to the paper surface as shown by the arrow 34. The scraping plate 22 is the hopper body.
The lower part of the wall surface 12 of the hopper 12 has a linear shape along the wall surface so that the residual soil attached to the inner wall surface of the hopper body 12 can be reliably scraped off.

Reinforcing members 36 and 38 made of H-shaped steel for reinforcing the hopper body 12 are fixed around the upper end of the upper rectangular portion 14 constituting the hopper body 12 and the central portion in the vertical direction. A liner 40 is fixed to the inner surface of the lower truncated pyramid portion 16 along the stroke of the scraping plate 22 to guide the scraping plate 22 and to reinforce the lower truncated pyramid portion 16 and prevent wear. I am trying.

As shown in FIG. 5, the cylinder 24 of the hydraulic jack 20 has its upper end pivotally attached to a bracket 44 provided on the inner wall surface of the upper rectangular portion 14 via a pin 42. Therefore, the cylinder 24
When the rod 28 is driven forward to lower the scraping plate 22 toward the lower opening 23, the cylinder 24 rotates about the pin 42 in the counterclockwise direction in FIG. 5 as the rod 28 advances. The rod 28 does not interfere with the inner wall surface of the lower truncated pyramid portion 16. On the other hand, the cover 25 is provided so as to have a gap with the outer peripheral surface of the cylinder 24.
When the scraping plate 22 is pushed down to near the lower opening 23, the lower end comes into contact with the side surface of the cylinder 24 to rotate the cylinder 24 toward the center of the hopper body. The cylinder 24 is prevented from rotating more than necessary to prevent the scraping plate 22 from moving away from the inner wall surface of the lower truncated pyramid portion 16. An oil supply pipe (not shown) for supplying driving oil to the hydraulic jack 20 is drawn out from an upper opening of the hopper body 12 and connected to a hydraulic pressure source.

The operation of the embodiment configured as described above is as follows.

The lower opening 23 of the hopper body 12 can be opened / closed by an opening / closing device (not shown), so that the earth and sand (remaining soil) excavated by the shield excavator can be temporarily stored in the hopper body 12. Then, if the dump truck is arranged below the earth and sand hopper 10, the lower opening 23 is opened, and the residual soil in the earth and sand hopper 10 is dropped onto the bed of the dump truck. At this time, the hydraulic jack 20 of the scraping machine 18 provided on the inner surface of the hopper body 12 is driven to move the rod 28 forward to lower the scraping plate 22 toward the lower opening 23.

That is, the lower opening 23 of the hopper body 12 is opened, and the cylinder 24 in the state shown by the solid line in FIG. 5 is driven to advance the rod 28 downward. This allows
The scraping plate 22 provided at the tip of the rod 28 slides down along the liner 30 and scrapes off the residual soil adhering to the inner wall surface of the lower truncated pyramid part 16. At this time, the cylinder 24 rotates toward the center of the hopper body 12 as the rod 28 advances, and the scraping plate 22 slides down while inclining to the rod 28.

When the scraping plate 22 reaches the lowermost end near the lower opening 23, the side surface of the cylinder 24 comes into contact with the inner surface of the lower end of the cover 25 and the forward movement of the rod 28 is stopped, as shown by the alternate long and short dash line in FIG. . Then, when the rod 28 begins to retract, the cylinder
24 oscillates toward the wall surface of the hopper body 12 due to its own weight, and the scraping plate 22 also oscillates due to its own weight to return to the initial state shown by the solid line in FIG.

As a result, even if the highly viscous residual soil that is likely to adhere to the sediment hopper 10 is thrown in and stored, the arch phenomenon due to the residual soil itself can be prevented and clogging of the hopper can be prevented. Therefore, it is possible to eliminate the interruption of the propulsion of the shield excavator due to the clogging of the hopper, which has occurred conventionally, and improve the efficiency of excavation work. Moreover, the hydraulic jack 20 of the scraping machine 18 is pivotally attached to the hopper body 12, and an eccentric head 30 is provided on the hydraulic jack 20.
By attaching the scraping plate 22 to the scraping plate 22 via the universal joint 32, even when the scraping plate 22 is lowered along the inner wall surface of the lower truncated pyramid portion 16 to near the lower opening 23, the rod of the hydraulic jack 20 is The residual soil can be reliably scraped off without interfering with the inner wall surface of the lower truncated pyramid frustum portion 16 in which 28 is inclined.

Each scraping machine 18 has its own scraping plate 22.
May be lowered simultaneously, may be lowered at different timings, and may be reciprocated a plurality of times. And
In the above embodiment, the case where the scraping plate 22 is operated by the hydraulic jack 20 has been described, but the scraping plate 22 may be operated by another actuator such as an air cylinder. Furthermore, in the above-described embodiment, the case where a plurality of scraping machines 18 are provided has been described, but the number of scraping machines 18 may be one, or a plurality of scraping machines 18 may be arranged at equal intervals. . Further, in the above-mentioned embodiment, the treatment of the residual soil by the shield construction method has been described, but it goes without saying that the treatment is not limited to this.

In the embodiment, the cylinder 24 is swingably attached and the scraping plate 22 is attached to the hydraulic jack 20 via the universal joint 32, but the lower truncated pyramid portion 16 of the hydraulic jack 20 is described. Tilt the scraping plate 22 according to the inclination of the
It may be fixedly attached to the rod 28.

[Effect of device]

As described above, according to the present invention, when a cylinder provided on a vertical wall surface is actuated to extend a rod, a scraping plate provided at the tip of the rod slides down a wall surface inclined inward to scrape earth and sand. As the cylinder drops, the cylinder rotates toward the center of the hopper as the scraping plate descends.
The rod can be extended without interfering with the inwardly inclined wall surface, and the scraping plate can be lowered to near the lower opening of the hopper to prevent the formation of an arch due to the earth and sand in the hopper. Moreover, since the cover regulates the amount of rotation of the cylinder, the scraping plate is not largely separated from the wall surface of the hopper, and the reduction of the scraping effect can be prevented. Therefore, it is possible to eliminate the interruption of the propulsion of the shield excavator due to the clogging of the hopper and improve the efficiency of excavation work.

[Brief description of drawings]

1 is a plan view of the earth and sand hopper according to an embodiment of the present invention, FIG. 2 is a front view of the same embodiment, FIG. 3 is a side view of the same embodiment,
FIG. 4 is a detailed explanatory view of the scraping machine according to the embodiment, and FIG.
The figure is an illustration of the operation of the scraping machine. 10 …… Sand and sand hopper, 12 …… Hopper body, 18 …… Scraping machine, 20 …… Hydraulic jack, 22 …… Scraping plate.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Koji Okabe 4-13-13 Akasaka, Minato-ku, Tokyo Kyowa Denshi Co., Ltd. (72) Inventor, Yuji Suzuki, 4-13-13 Akasaka, Minato-ku, Tokyo Kyowa Denki Co., Ltd. (56) References Actually open 64-51097 (JP, U) Actually open 58-188893 (JP, U) Actual public 61-15024 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A earth and sand hopper having a hopper body in which an inclining wall inclined inward is continuously provided below a vertical wall,
A cylinder that is attached to the vertical wall with the rod facing downward and is rotatable in the center direction of the hopper body, and is fixed to the vertical wall by covering the upper portion of the cylinder and having a gap between the cylinders. A cover that allows the rotation of the cylinder and restricts the rotation amount of the cylinder, and a scraping plate that is attached to the rod so as to be eccentric to the center of the hopper body so as to be swingable and that moves up and down along the inclined surface. Earth and sand hopper characterized by having and.