JPS5835755Y2 - Drilling bucket of earth drill machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drilling bucket for an earth drilling machine.

BACKGROUND OF THE INVENTION The bottom lid of the drilling bucket of an earth drill machine conventionally used for on-site pier construction etc. often opens during excavation.

The present invention improves the bottom cover opening/closing mechanism of conventional drilling buckets to prevent accidents such as the bottom cover opening during excavation.

Portions A9 and C in Figure 1 and Ports A and 2 in Figure 3 show the opening/closing mechanism of the bottom lid of a conventional drilling bucket.A bottom lid 2 equipped with a digging blade 3 is connected with a pin to the lower end of the packet 1 so that it can be opened and closed. 4′
The bottom cover 2 is opened and closed by operating a lever 6'.

Figure 3A9 shows the details of the opening/closing mechanism of the bottom cover of a conventional drilling bucket.The conventional lever 6' has a vertical part 5a' and a horizontal part 6b' each made of a single rod member, and the vertical part 6a' Bottom cover fixing hole 17 formed on the bottom cover side at the lower end (see Figure 1)
A palm lift that engages with is integrally attached.

Then, the lever 6' is rotated from the position shown by the solid line to the position shown by the chain line, and from the position shown by the chain line to the position shown by the solid line at the rotation point 8, as shown in the opening of FIG. The bottom cover 2 opens when the palm ridge rotates and the palm ridge matches the bottom cover stopper hole 17, and when the palm ridge shown by the chain line in Fig. 1 is in a position that does not align with the bottom cover holder hole 17, the bottom cover 2 opens. Closed.

Furthermore, a tension spring 9 is interposed between the horizontal portion 6b' of the lever 6' and a crosspiece 5 (immovable member) extending over the upper end of the packet, and the crosspiece 5 further restricts the rotational position of the lever 6'. A stopper 10 and a stopper 11 are provided.

In the opening of Figure 3, the solid line is the lever 6' when the bottom cover 2 is closed.
The chain line indicates the position of the lever 6' when the bottom cover 2 is opened.

By the way, in the conventional bottom cover opening/closing mechanism, the lever 6'
Therefore, the rotation angle of the palm lift is usually 30
In addition, since the lever 6' was a mechanism for preventing rotation by relying only on the spring force of the spring 9, the bottom cover 2 often opened during excavation.

The present invention reliably prevents such accidents in which the bottom cover opens during excavation.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 2 A 9 opening and C and Figure 4 A 5 opening and C show the bottom lid opening/closing mechanism of the drilling bucket of the present invention. Rotated approximately 90 degrees.

The lever 6 is divided into a vertical part 6a and a horizontal part 6b, and both are connected by a pin 12 so that the horizontal part 6b can rotate vertically with respect to the vertical part 6a.

A palm lift is attached to the lower end of the vertical part 6a of the lever 6, as in the conventional example, and a tension spring 9 is installed between the horizontal part 6b of the lever 6 and the crosspiece 5 (immovable member) that is hung over the upper end of the packet. It has been intervened.

A lever receiver 13 extending over a predetermined length is integrally attached to the upper surface of the crosspiece 5, and a recess 14 is formed near the end on the tension spring 9 side. is engaged, and when the horizontal portion 6b of the lever 6, shown by the solid line 1 at the opening in FIG. When step (3) is taken, the bottom cover 2 is in a completely closed state.

When the lever 6 is removed from the recess 14 and rotated approximately 60' to the position shown by the chain line II at the opening in Figure 4, the palm lift is rotated approximately 60 degrees relative to the bottom cover retaining hole 17 in Figure 2. The horizontal part 6b of the lever 6 is placed in the position shown by the lever receiver 13.
It comes to the position of end face 15 of.

A stopper 16 is provided at a position where the lever 6 is lowered along the end surface 15 of the lever receiver 13 and rotated about 30 degrees.

When the lever 6 is rotated approximately 30 degrees and the horizontal portion 6b comes into contact with the stopper 16 shown by the chain line III in the opening of FIG. Then, open the bottom cover 2.

Figures 5 A to 2 show the sequence of operations for opening and closing the bottom cover. The bottom cover is completely closed.

The mouth is in the process of discharging soil, and the lever 6 is removed from the recess 14 A-)
Rotate it until it hits B-+C and stopper 16 (portion in Figure 4).

Then, the palm lift aligns with the bottom cover stopper hole 17, the bottom cover opens, and the excavated soil is discharged.

In C, the bottom cover is being closed, and the lever 6 is automatically rotated from B to C-+B by the force of the spring 9, and the lever 6 is moved to the lever receiver 1.
3, and the palm lift is rotated by 30 degrees with respect to the bottom cover fixing hole 17.

2. With the bottom cover completely closed, press lever 6 to B-+.
A and spring force to rotate it and engage it in the recess 14.

In this state, the palm rift is perpendicular to the bottom cover fixing hole 17, and the bottom cover is completely closed.

Further, in conventional drilling buckets, the bottom cover 2 is connected to the outermost side of the packet 1 with a pin 4', as shown in FIG. 1A and FIG. 6B.

Therefore, when the bottom cover 2 is opened, the bottom cover 2 hits the borehole wall Z and roughens the borehole wall Z (the part indicated by arrow Y is the part that hits the borehole wall).

In the present invention, the bottom cover 2 is connected with a pin 4 at a position slightly closer to the center than the outermost side of the packet 1, as shown in FIG. 2A and FIG. 7A.

For this reason, even if the bottom cover 2 is opened during excavation, the bottom cover 2 does not or almost never touches the borehole wall Z (the part indicated by arrow Y is the part that touches the borehole wall). It won't damage Z.

As explained above, in this invention, during excavation, the operating lever engages with the recess provided in the lever holder, and the bottom cover cannot be opened unless the lever is rotated approximately 90 degrees, so it is not possible to open the bottom cover while excavating as usual. There is no danger that the bottom cover will open.

In addition, even if the packet is opened, the bottom cover is pin-connected slightly closer to the center than the outermost side of the packet, so the bottom cover does not hit the borehole wall, or it does not touch the borehole wall, so it does not damage the borehole wall.

[Brief explanation of drawings]

Figure 1 A9 and C show conventional drilling buckets,
A is a side view, the opening is a plan view, and C is a plan view showing the relationship between the bottom cover fixing hole and the tip. Figure 2 a. Figures 1 and 2 show the drilling bucket of the present invention, figure 1 is a side view, figure 3 is a plan view, and figure 3 is a plan view showing the relationship between the bottom cover fixing hole and the tip. Figure 3A9 shows details of the operating lever of the bottom cover opening/closing mechanism in a conventional drilling bucket, where A is a side view and the mouth is a plan view. Figures 4A and 4B show details of the operating lever of the bottom cover opening/closing mechanism in the drilling bucket of the present invention, where A is a side view, the opening is a plan view, and C is a perspective view. Figure 5 A 2 opening, C, 2 are explanatory diagrams showing the operating sequence of opening and closing the bottom cover, A is during excavation, the opening is during soil removal, C is in the middle of closing the bottom cover, and 2 is when the bottom cover is fully closed. show. FIG. 6A shows the positional relationship of the attachment of the conventional bottom cover to the packet; FIG. 6A is a side view, and the opening is a plan view. Figure 7 A9 indicates the positional relationship of the bottom cover of the present invention when attached to the packet, A is a side view and the opening is a plan view. 1...Packet, 2...Bottom lid, 3...
...Drilling blade, 4...Bottom cover pin connection point, 5
・・・・・・Beam, 6・・・・Lever, 7・・・・
-Yellow, 9... Spring, 12... Pin connection point between the vertical and horizontal parts of the lever, 13...
Lever receiver, 14... Recess formed in the lever receiver, 15... End face of the lever receiver, 16...
...Stopper, 17...Bottom cover fixing hole.

Claims (2)

[Scope of utility model registration request] (1) A bottom cover with a digging blade is connected to the bottom end of the packet with a pin so that it can be opened and closed freely, and the lever is operated by engaging the tip with an operating lever in the bottom cover fixing hole formed on the bottom cover side. In a drilling bucket for an earth drill machine in which the bottom cover is opened and closed by rotating the bevel against the bottom cover fixing hole, the operation lever is divided into a vertical part with a bevel attached to the lower end and a horizontal part. The vertical part and the horizontal part are connected with a pin so that the horizontal part can rotate vertically with respect to the vertical part, and a tension spring is interposed between the horizontal part of the operating lever and the packet side, and the packet side A lever receiver is provided that extends over a predetermined length, and a recess is provided at the end of the lever receiver closer to the tension spring to which the horizontal portion of the operating lever engages, and the horizontal portion of the operating lever is removed from the recess provided in the lever receiver for operation. When the lever is moved above the lever holder and rotated by a predetermined angle beyond the lever holder, a stopper is provided where the horizontal part of the operating lever comes into contact, and the horizontal part of the operating lever is placed in the recess provided in the lever holder. In the engaged state, the bottom cover is completely closed when the tip is perpendicular to the bottom cover stopper hole, and when the horizontal part of the operating lever touches the stopper, the bottom cover stopper hole and the tip are aligned. A drilling bucket for an earth drill machine that has a bottom cover that opens when the ground is opened. (2) The earth drilling machine according to claim 1 of the utility model registration, characterized in that the bottom cover is connected with a pin to the lower end of the packet at a position slightly closer to the center than the outermost side of the packet so as to be openable and closable. drilling bucket.