JPH0280187U

JPH0280187U -

Info

Publication number: JPH0280187U
Application number: JP15863588U
Authority: JP
Priority date: 1988-12-06
Filing date: 1988-12-06
Publication date: 1990-06-20
Anticipated expiration: 2003-12-06
Also published as: JPH072775Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係るマルチタイプ
ダウンザホールドリルの要部を示したもので、第
１図ａは第１図ｂのＡ−Ａ線矢視を示す断面図、
第１図はｂは第１図ａの正面図、第１図ｃは第１
図ａのＣ−Ｃ線断面図、第１図ｄは第１図ａのＤ
−Ｄ線断面図、第２図は同マルチタイプダウンザ
ホールドリルとその付属装置を示す全体図、第３
図は従来のマルチタイプダウンザホールドリルの
要部を示したもので、第３図ａは第３図ｂのＡ−
Ａ線矢視を示す断面図、第３図ｂは第３図ａの正
面図、第３図ｃは第３図ａのＣ−Ｃ線断面図、第
３図ｄは第３図ａのＤ−Ｄ線断面図、第４図は従
来のマルチタイプダウンザホールドリルとその付
属装置を示す全体図である。１０……ケーシング、１１ａ，１１ｂ……ダウ
ンザホールドリル、１３ａ，１３ｂ……ビツト、
１８……ハンマー、２０……エゼクター、２０ａ
……ノズル、２１……入気孔、２２……スライム
吸入口、４０……ドリルロツド、４１ａ……排気
孔、４２ａ……入気孔。 FIG. 1 shows the main parts of a multi-type down-the-hole drill according to an embodiment of the present invention, and FIG. 1a is a sectional view taken along line A-A in FIG. 1b;
In Figure 1, b is the front view of Figure 1 a, and Figure 1 c is the front view of Figure 1.
Figure 1 d is a sectional view taken along line C-C in Figure 1, D is in Figure 1 a.
- D line sectional view, Figure 2 is an overall view of the same multi-type down-the-hole drill and its attached equipment, Figure 3
The figure shows the main parts of a conventional multi-type down-the-hole drill.
3b is a front view of FIG. 3a, FIG. 3c is a sectional view taken along line C-C of FIG. 3a, and FIG. 3d is a sectional view of D of FIG. 3a. -D line sectional view, FIG. 4 is an overall view showing a conventional multi-type down-the-hole drill and its attached equipment. 10... Casing, 11a, 11b... Down the hole drill, 13a, 13b... Bit,
18...Hammer, 20...Ejector, 20a
... Nozzle, 21 ... Inlet hole, 22 ... Slime suction port, 40 ... Drill rod, 41a ... Exhaust hole, 42a ... Inlet hole.

Claims

[Scope of claim for utility model registration] A double-pipe drill rod having an inlet hole and an exhaust hole, a casing attached to the tip of the drill rod, a plurality of drill rods arranged on the axis of the casing and concentric circles thereof, communicating the proximal end with the air inlet, and
A down-the-hole drill is equipped with a hammer that drives and hits a bit attached to each tip with pressurized air, and a plurality of hammers are arranged in the casing, the base end communicates with the exhaust hole of the drill rod, and the drill rod is connected to the air inlet hole. It consists of an ejector that discharges pressurized air from communicating nozzles toward the exhaust port and has a slime suction port at its tip, and drives the hammer to remove the slime excavated by each of the bits from the discharge port at the tip of the bit. A reverse circulation multi-type down-the-hole drill characterized in that the discharged exhaust gas is sucked in by the ejector and sent to the ground.