WO1980001087A1

WO1980001087A1 - Earth auger

Info

Publication number: WO1980001087A1
Application number: PCT/JP1979/000292
Authority: WO
Inventors: M Fujiwara; M Miyaguchi; T Nakamura; M Ebine; H Wada; K Yamamoto; S Yamada; I Uchizaki; F Tanifuji; M Sato; A Suzuki; T Murai
Original assignee: Takenaka Komuten Co; Sanwa Kizai Co Ltd
Priority date: 1978-11-21
Filing date: 1979-11-14
Publication date: 1980-05-29
Also published as: EP0020779B1; EP0020779A4; DE2965956D1; EP0020779A1

Abstract

An apparatus for driving an earth auger of the type which simultaneously excavates a plurality of vertical holes via a plurality of excavating rods such as auger screws or the like to thereby form a continuous wall under the ground by mortar charged into the vertical holes, the apparatus enabling transmission of driving force to the respective excavating rods from a sole drive source by making variable the distance between the axes of the excavating rods aligned in parallel. This device comprises two drive gears provided on a motor drive shaft two gear trains formed by meshing the gear on an output shaft, which shaft is connected with the two drive gears, with the two drive gears, wherein the two gear trains are supported respectively within gear boxes to carry the drive motor on the upper stage (motor side) gear box and to rotatably support the lower stage gear box on the drive shaft to thereby allow the distance between the output shafts to be varied. Thus, even if auger screws of different outer diameters are connected to one another, an excessive gap will never form between the screws, nor will the screws interfere with one another.

Description

Earth Oger Technical Field

The present invention is an earth auger used to improve the ground and to create continuous walls such as water blocking walls and earth retaining walls in the ground, with excavation ports for compound textbooks, etc. In particular, it relates to the drive unit for multiple excavation ports, the support device for the drive unit Q drive unit, the interval maintenance and steady rest device for the excavation rods, and the bearing device. Background technology

Conventionally, earth augers have been used as a means of creating continuous walls such as water blocking walls and earth retaining walls in the ground. A construction method has been adopted in which a continuous wall is created by creating an underground pillar and bringing it close to each other.

Therefore, since a normal earth auger is a single talented gas cylinder 1) drilling holes, it is necessary to make a special case when creating a continuous wall as described above. Due to its inefficiency, recently, multiple August cleaners have been installed side by side, and each of these August cleaners has been driven all at once to excavate a row of vertical holes in the ground. In addition, a system pillar is being used to form a continuous wall by constructing a mortal pillar and a sol mortal pillar.

However, the above-mentioned conventional this kind of earth talent is each auger.

OMPI

^WIP °- Multiple talented squirrels, either of which are laid out in a fixed position at regular intervals or each have an independent drive unit, with a spacing between the squeeze axes. It has been proposed that the equipment be installed side by side in a variable manner, but in the former case, when it is necessary to change the outer diameter of the talented gas rig for convenience, for example, it was replaced with a smaller diameter one. In some cases, there is a gap between the gauges, which is why]? Drilling a row of pits creates a residue between the pits, which must be drilled after drilling. As a result, work efficiency will decrease. Even if you try to make a large diameter, | , There was a drawback that the range of use was narrow.

In the latter case, since multiple August cleaners each have their own independent device, the size and weight of the entire drive unit are large, and therefore the talent is large. Since the number of parallel cables is limited and the variable dimension between the screen axes is small, there is a problem that continuous wall construction cannot be performed efficiently. rice field.

In addition, the support of the drive part of the conventional earth auger has a built-in motor, speed reducer, etc., and the bracket is integrally fixed to the back of the holder of the moving part by welding. , Multiple pairs of slide fittings are connected to this bracket, and these slide fittings are engaged with the guide pipe attached to the front of the relay.]? , It is mounted on the leader master so that it can be raised and lowered.

However, in the conventional support device for the auger drive unit, the slide metal fittings are fixed to the bracket welded to the back surface of the drive unit as described above. There is a drawback that it is only possible to attach the earth talent to a reader that has a guide pipe at the same distance as the metal fittings. Also, if you want to attach the drive unit to a relay that has a wide space guide pipe ^, the drive unit should be attached to the joint surface between the bracket and the slide metal fittings. It is conceivable that the spacing between the slide metal fittings may be widened by interposing a spacer. However, if the spacer becomes thicker, the bracket and the metal fittings may become unstable. ] ?, Since the excavation work is dangerous, it is mostly used in actual work; ^ cannot be used.

On the other hand, as described above, multiple drilling rods such as auger cleaners are installed side by side to drill a large number of vertical holes at once, and multiple columns used to create a continuous wall in the ground. In the auger of the formula, the upper end of each auger shaft is connected to the auger drive part, so the distance between the auger shafts is kept constant, but the lower part is not constrained to each other. The spacing between the vertical holes to be drilled becomes uneven due to the fluctuation of the spacing, and the spacing between the moral pillars or the steel mortal pillars that are created varies, resulting in a continuous wall. It leads to unfavorable results.

Therefore, in this multi-talented Iota, in order to keep the distance between each excavation opening constant regardless of whether or not the ί with screw blades is present or not. An excavation π that connects each excavation port to each other in the middle of each excavation port. Although a space stabilizer is provided, the conventional type of space stabilizer has a cylindrical body rotatably fitted in the middle of each excavation α-d, and the cylindrical body is simply a connecting plate.]? The space between each cylinder is fixed, and there is a drawback that a separate space stabilizer must be prepared each time the space between the excavation ports is changed. ..

On the other hand, multiple excavations are possible so that the spacing between the excavation ports can be changed according to the construction conditions. A steady rest device is installed on the lower front of the reservoir to hold the lid. However, in the conventional anti-vibration device, the position of the guide holder that holds the excavation rod is fixed. There are some drawbacks.

Furthermore, since the above-mentioned spacing member rotatesly inserts and supports the auger shaft into the bearing portion, it is necessary to prevent earth and sand from entering the bearing portion. Since the sliding surface is simply fitted with synthetic resin layered plywood or bearings such as oilless bearings, it is easy for earth and sand to infiltrate during use. At the same time when the zero rotation of the shaft is impaired, the bearing and the auger shaft are severely worn. = --Disclosure of the invention

The present invention has been made for the purpose of solving each of the above-mentioned problems, and is between the shafts of a plurality of excavation openings.

ΟΜ

r WIF By making the distance variable and using various talented gas screws with different outer diameters, it is possible to drive the holes with a single drive source while allowing them to be driven by a single drive source. It is a drive device of the earth auger

!! ), It is a support device for the drive unit so that when the drive device is mounted on the guide pipe on the front surface of the power of the earth auger, it can be mounted in accordance with the difference in the distance between the pipes. In addition, it is a device for keeping the distance between excavation mouths and holding the steady rest to prevent runout while keeping the excavation π-did interval constant by restraining between the excavation π-edges of multiple August cleaners, etc. !! ), Further, it is to provide a bearing device that prevents the intrusion of earth and sand into the fitting part between the above-mentioned spacing holding device and the excavation opening. A brief description of the drawing

Fig. 1 shows an embodiment of the gauge according to the present invention / ^, Fig. 2 is an enlarged plan view of the drive unit, Fig. 3 _ same-side view, and Fig. 4 is. The vertical sectional side view, Fig. 5 is a front view with the main part of the drive unit as a cross section, Fig. 6 is a plan view showing an example of the output shaft fixing means, Fig. 7 is an enlarged cross-sectional view of the same part, and Fig. 8. Figures (Α) and (Β) are explanatory views showing the adjustment state of the inter-axis distance of the output shaft, Fig. 9 (A) is an enlarged plan view of the support device of the drive unit, and Fig. 9 (B)'is the same front. Figure, .Fig. 1 '0 (A) is a plan view showing other examples, Fig. 10 (B) is the same front view, and Fig. 11 and Fig. 12 are enlarged views showing other examples. Top view, Fig. 13 is an enlarged front view showing an example of an excavation α-id interval stabilizer, Fig. 14 (A) is a cross-sectional view of A — line A of Fig. 13, and Fig. 14 (Fig. 14). B)

ΟΜΡΙ Is a cross-sectional view showing the state in which the interval of the excavation rod can be changed in Fig. 13; Fig. 15 is a plan view of the anti-vibration device. Fig. 16 is the same front view and Fig. 17 is a guide. Holder mounting phase diagram, Fig. 18 is a cross-sectional view of Fig. 17 B — B, Fig. 19 is an implementation of a bearing device in an excavation rod spacing stabilizer. Semi-new view showing an example. Is. Best mode for carrying out the invention

As shown in the outline shown in Fig. 1, the earth sword 1 is a guide part 3, 3 (guide section consisting of pipes provided in the vertical direction on the front of the lid mass 2). Guided by a switch (hereinafter referred to as a guide pipe), which is not shown in the drive unit 4! ) It is hung up and down freely via a mouthpiece 5, and is used as an excavation rod for multiple drilling rods (4 in the example) in this drive mounting 4. -6, 6, et al.', 6'are attached in Europe.

The drive unit 4 is from the moving part 4a and the holder 4] ?, and the internal structure of the driving part 4 is a pair of two left and right as shown in Fig. 3 to Fig. 5. August Cleaner 6, 6 and 6', 6'each with one motor 7, 7', and this motor 7, 7']? Two on each side Each talented gas clear 6, 6 and 6', 6'are alternately driven to the right and left.

As shown in Fig. 5, the drive shaft 9 is connected to the output shaft 8 of the motor 7, and the drive shaft 9 is connected to the drive shaft 9 in the figure. Screen drive system 10 and 2nd Saiichi

A. WIFO The gas clear drive system 1 1 is installed at appropriate intervals up and down! ), The 2nd Augmentary Motion System 1 1 is rotatable with respect to the above drive shaft 9.

The first August clear drive system 10 is a drive gear 1 2 fixed on the drive shaft 9, an idle gear 1 3 fitted to the drive gear 1 2, and this idle. It has an output gear 1 4 fitted to the gear 1 3, and each of these gears 1 2, 1 3, 1 4 is pivotally supported in the gear box 1 5, and the output gear 1 4 is the output shaft 1 6 It is fixed to. The second August clear drive system 1 1 has a drive gear 1 7 fixed to the drive shaft 9 and an output gear 1 8 fitted to the drive gear 1 7, and these gears 1 7 , 1 8 are bearing in the gear box 1 9, and the output gear 1 8 is fixed to the output shaft 20.

The output shafts 1 6, 20 penetrate the elongated holes 2 2, 2 3 drilled in the bottom 2 1 of the drive unit 40, and the output shafts 1 6, 20 are fixed to the bottom 2 1 at the desired positions. The fixing means 2 4 is provided, and the lower ends of the output shafts 1 6 and 20 are connected to the upper ends of the oil cleaners 6 and 6, and the couplings 2 5 and 2 are free to connect. _E that has 6

The above fixing means 2 4 shows an enlarged cross section in Fig. 7 (

Thus, a substrate 2 9 having a claw 2 8 that engages with a step 2 7 formed at the bottom of the gear case 1 5, -3—Θ- (shown for convenience only on one side) is provided and fixed. A bolt that selectively passes through the bolt holes 3 0, 30… at the bottom 2 1 of the means 2 4 3 1 ························································································ Therefore, the first and second August drive systems 10 and 1 1 gearboxes 1 5 and 19 are the output shafts 1 6 and 2.

Drive shafts 9 can be displaced in a connected state according to the position of 0]? ) The intervals between the output shafts 1 6 and 20 can be arbitrarily selected and fixed. In the figure, 3 2 is a level. Next, the operation of the above device will be described. August Cryeu

To adjust the spacing of 6, 6, 6', · 6 ^, loosen and remove the bolt 3 1, 3 1… of the fixing means 2 4 and use a clean or other appropriate means]? If you move the output shafts 1 6 and 20 along the holes 2 2 and 2 3 in the direction of 5 or closer to each other, the permanent,'Duxe

8 As shown in Fig. (A) or (B), gear 1 5 is output.

When the drive shaft of the motor is displaced by rotating around 6,

The gear ^ 1 9 rotates around the motor shaft, and the axis of the output shaft is displaced. When the positions of the output units 1 6 and 20 are determined, the holes 3 1, 3 1… that pass through the board 2 9 of the fixed hand 2 4 are connected to the bottom 2 1 of the drive unit 4. Insert through the bolt holes 30, 30… and tighten, socks

If so, fix the steps 2 7 of the gears ^ _― 15 and 19 with the claws 2 8 of the board 29, and fix the output shafts 1 6 and 20 at that position.

After setting the interval between each output axis 1 6, 2 0 and 1 6', 2 0'in this way, the talented user 6, 6, 6', 6 is set for each output axis. If you connect and drive motor 7, Τ, it will be on one side.

0 \ IFI In this case, the drive shaft 9 is rotated through the output shaft 8, and the drive gear 1 2 and the idle gear 1 3 and the output gear 1 4 are passed through the output shaft 1 6 and the drive gear 1 7 and The output shafts 20 are rotationally driven in opposite directions through the output cables 1 8 to rotate the August Cleaners 6 and 6. The other side of the August reviews 6'and 6'also rotate in the same way. Since the structure on the other side is the same, a hash is added to the code of the corresponding part.

In this way, pit-houses can be drilled at arbitrary intervals.

The movement of the output shafts 1 6, 1 6', 20 ·,. 20'is a fluid cylinder or lateral feed! ) It can also be done by using the sliding mechanism, etc. In this case, replace it with the mouth of the cylinder or the fixed mechanism that holds the mouth of the sliding mechanism. do it.

In addition, in this example, a drive device for a 4-unit auger in which two sets of drive units of the above configuration are installed side by side in a holder has been described, but in the case of a 2-unit auger, one set is sufficient, and 6 stations are also used. In the case of an auger, three sets of drive units should be incorporated into the holder.

Next, the support device in which the drive unit 4 including the earth talent drive unit 4a and the holder 4b is mounted on the guide pipes 3 and 3 of the leader master 2 will be described. ..

In Fig. 9 (B), the back surface 40 of the holder 4 b of the drive device 4 is provided with a recess 4 1 that constitutes a guide in the direction of: and the center of the holder 4 b. Bracket 4 3 with a convex part 4 2 that fits into the concave groove 4 1 of the bolt 4 4…, nut 4 4'

O PI

/ Fu, V / IPO ...]) It has been removed and installed on its own. The bracket 4 3 has two side plates 4 6, 4 6 fixed at right angles to the board 4 5, so the slide metal fittings 4.7 are attached to these side plates 4 6, 4 6. ,. 4 7 pointing inward, bolt 4 8…, nut 4 8'···

Slide brackets-4 7, 4 7 engage the guide pipes 3 and 3 mounted on the leader 2 with an appropriate interval L to attach the drive device ^ to the leader 2 ¾. Therefore, it is self-sustaining.

In addition, as shown in Fig. 10 (A), the leader has a guide pipe 3'and 3'with a wider mounting interval than the one shown in Fig. 9 (A). If the drive unit ^ "is set to 2', the result is shown in Fig. 9 (B).

:) Shown state] 3 Volt 4 4…, Nut 4 4,… Loosen the back of the holder 4 0 jp Remove the bracket 4 3 and remove the leader mast guide. Bracket 4 3'with sliding metal fittings 4 7'and 4 7 with the same mounting interval as the mounting interval 1 / of the drives 3'and 3', and the host of the drive device 4' Attach to the back 40. When replacing this bracket, the newly installed bracket 4 3'will be securely centered by the guide.

As another example of the joining guide between the holder 4 0 and the bracket 4 3 in the present invention, as shown in Fig. 11 on the front surface of the bracket 4 3. An example in which a concave'lead 4 is provided and a convex portion 4 2'is provided on the back surface of the holder 4 0, and as shown in Fig. 1 and 2, the back surface of the holder 4 0 and the front surface of the bracket 4 3 are both concave. In some cases, 4 1 "and 4 1" are provided, and a key 4 9 is inserted into the square hole created by this recess.

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\ WIPO can get.

Or support apparatus of the present invention is, kill de Lock Puha comma, di Ichize Le Ha down Ma, soil improvement machine, or the like, Li Dama be sampled to f _H, in applied to all of the go-between up and down is allowed to work equipment ..

Next, excavation of a gas screw, etc., a mouth space stabilizer and a steady rest device will be described.

In Fig. 13 Fig. 13, the upper and lower flanges 50 ··· 5 1… are projected in the middle of each excavation road 6, 6'at appropriate intervals in the axial direction. Yo]} · An annular recess 5 2… is formed. In this concave groove 5 2…-The upper and lower bearings 5 3 and 5 4 corresponding to the above-mentioned bearings 5 0… 5 1… are projected up and down. It is rotatably integrated via bearing members 56 such as metal. Vertical plate-shaped protrusions 5 7 are fixed to the outer periphery of the cylinder 5 5 toward the adjacent cylinder, and a plurality of vertical plate-shaped protrusions 5 7 are attached to the protrusions 5 7 in the parallel direction of the excavation openings 6. Rows (two rows in the illustrated example) of bolt holes 5 8… are drilled. Two plate-shaped connecting tools 5 9 ... are provided on the opposing protrusions 5 7 and 5 7 with respect to the bolt holes 6 0 ... By appropriately selecting the bolt holes 5 8… and tightening the bolts 6 1… that have been inserted into both bolt holes]? In the figure, 6 2 is the 0 link'that seals the rotating sliding part between the excavation opening 6 and the cylindrical body 5 5, and 6 3 is the screen of the excavation opening' opening'. — It is a feather.

Next, the operation of the above-described embodiment will be described. Fig. 1 3 and Fig. 14 Between the shafts of excavation σ rods 6 and 6 when each excavation rods 6 and 6… are held by the excavation π rod interval stabilizer in the state shown in the figure. When it becomes necessary to change the distance, loosen the bolt 6 1, 6 1… and lift the fitting 5 9 ... After changing the distance between the axes of 6…, as shown in Fig. 14 (B), the protrusion 5 7… is used for the hole hole 6 0… of the connector 5 9…. Select the route hole 5 8… as appropriate, insert the bolt 6 1… into both bolt holes and tighten, and fix the inter-axis distance between each drilling rods 6, 6….

It is desirable that the hole holes 5 8 of the protrusions 5 7… be drilled in rows with the expected interaxial change and Ιύ.

In this embodiment, the protrusion 5 7 and the connector 5 9 are tightened by a bolt, which is indicated by using a pin or the like. You can do it.

Fig. 15 to Fig. 18 show the steady rest device of the excavation π lid. ]) Attached holding frame 6

U-shaped rear frame 6 6 on the front of 5]? Attached to the front frame 6 on both ends of this rear frame 6 6 One end of 8, 6 8 is pin 6 9, 6 9

Ϊ) Opening and closing from the center to both sides It is pivotally attached to both sides, and both front frames. The other ends of 6 8 and 6 8 are connected by a pin 70 and are hollow. It forms a rod guide frame. Above § S frame 6 6,

Bolt holes on the top, bottom front, and back of 6 8, 6 8

One CMPI A large number of 7 1… are drilled in this bolt hole 7 1…, and a pair of mouth guide holders 7 2 · “according to the Kamibolt 7 3]? . 7 4 is the above guide holder 7 2'internal interior color] ?, and 7 5 is the above front frame 6 8

, 6 8 is a reporter used to connect', 7 6 is a working combination.

Next, the operation of this device will be explained.

First excavation Mouth guide holder 7 2… at the appropriate position according to the interval of the opening mouth 6… to the rear frame and front frame 6 8, 6 8 Luto 7 3…]? Fix. Then remove the pins 6 9 and open the front frames 6 8 and 6 8 at appropriate angles, and move the excavation rod 6… upward] 9 Insert into each rod guide holder 7 2. do. Therefore, operate the lever 75 to connect the front frames 6 8 and 6 8 and fix them with the pin 6 9. By the above work]? The excavation α-pod 6… is held in each guide holder 7 2….

To change the mounting interval of the excavation rod 6…, the position of the holder 7 2… in the rod plan should be changed. It is more efficient to use the worktables 7 6 and 7 6 for the above work. In addition, the anti-vibration device may be hung on the drive unit with a wire in the autumn state when it is attached to the guide pipe of the reader. 'Next, the shaft-bearing device suitable for the interval stabilizer shown in Figures 13 to 14 (A) and (Β) will be explained.

Fig. 19 is a semi-cross-sectional view showing an example of this bearing device, which is 80 OV1PI WIPO. Indicates the male side shaft of the joint of excavation opening 6.

A notch step is provided on the outer periphery of the end of the male side shaft 80 of the joint part of the excavation port 6, and the male side pipe shaft 8 1 of the bearing part of the excavation rod 6 is provided in a part of this step. An annular recess 8 2 was formed between the pipe shaft 8 1 and the end face, and a concave seal groove 8 3 was formed in the upper and lower ends of the recess 8 2 in the direction of the inner axis. In addition to providing the seal receiving member 8 4 integrally, the bearing member · 85 such as the oilless stainless steel is fitted between the seal receiving members, and the upper and lower ends are concave in the axial direction. The fixed bearings 8 7 forming the ru-篱 8 6 are freely assembled together.

The force that forms the radius 8 3 and the fixed bearing 8 7 of the above-mentioned seal receiving village 8 4; the poison S 6 ¾ and the series S 8 and 8 9', this The inner wall surface of the bearing chambers 8 8 and 8 9 facing the axis is formed on the taper surface 90 which is inclined in the direction of decreasing the radius from the center toward the D measuring part.

Inside the seal chambers 8 8, 8 9, hardened steel and other materials with high hardness and excellent wear resistance are made of materials 9 1, 9 2,

9 3 and 9 4 are installed in the playground, and these

On each outer edge of 9 1, 9 2 and 9 3, 94

The moving parts 9 5 and 9 6 are in sliding contact with each other.

The outer peripheral surfaces of the rings 9 1, 9 2, 9 3, 9 4 are

Parallel to the tape surface 90 on the inner surface of 8 8 and 8 9

Inclined taper surface 9 7, 9 8, 9 9, 10 0 0

] ?, This one side is 9 7, 9 8, 9 9,

Between the seal room 8 8, 8 9 and the tape surface 90 0 1 is intervening.

The above seal receiving member 84 and the fixed shaft. The outer peripheral end facing surface of the receiving part 8.7 is outward. The inclined surface in the expanding direction 1 0 2, 1 0 2, 1 0 3, Formed at 1 0 3] ?, by both inclined surfaces 1 0 2, 103]? 0 rings 1 0 4, 1 0 4 are press-fitted into the V-shaped groove formed. ..

— On the other hand, the fixed bearing portion 8 7 is provided with grease injection holes 1 0 5 and 105 in the radial direction, and the through holes 1 0 6 and 1 are formed in the bearing member 85. It communicates with 0 6, and the sliding surface between the bearing member 8 5 and the recess 8.2. And the grease can be injected into the seal chambers 8 8 and 8 9 above. .. In addition, at the end of the fixed bearing part 8 7 above, discharge ports 1 0 7, 10 7 for discharging the injected grease are bored] ?, These are blind plugs. Niyo! ?? It is sealed. Note that 1 0 ⁹ is a connecting member fixed to the outer surface of the fixed bearing 8 7] ?, and this connecting material 1 0 9 connects to the adjacent fixed bearing, and the bearing is constant. It is held at intervals.

Since this device has the above configuration, when drilling holes in the ground with the excavation port 6, the adjacent auger shafts are restrained by the fixed bearings 87]? It is dug up without changing the interval. · The rotation of the above-mentioned oil cleaner 6 is performed by sliding the oilless meter, etc., between the capital receiving part 8 5 and the recess 8 2 -peripheral surface. If the earth and sand in the drilling hole tries to infiltrate the above rotating part

OLiPI_ VIPO However, the inclined surfaces of the seal receiving members 8 and 4 and the fixed bearing 8 7 are formed according to the inclined surfaces 1 0 2, 1 0 2 and 100 3, 103]).

Since it is sealed in the 0-ring 1 0'4, 104, which is fitted to the V-shaped sill, it cannot penetrate, and even if it should enter the inside, the seal chamber Since it is sealed by 0 link '10 1 in 8 8, 8 9, it is prevented from reaching between the sliding surface of the bearing 8 7 and the excavation port 6. .. Industrial Applicability-In the present invention, two drive gears are vertically installed on the shaft connected to the motor at appropriate intervals, and each gear is equipped with a talent at the lower end.

— Sword that reads the gauge shaft: The two gear systems are mounted in the gear box by combining the ώ force gears that are iH ¾, and the upper stage (motor side) gearbo. The drive motor is installed in the axle, and the lower gearbox is rotatably supported with respect to the drive shaft so that the distance between the two K force shafts can be changed. , Since the above force shafts are fixed to the holder at arbitrary intervals, each gearbox is fixed by rotational displacement]?, At any interval between each output shaft. This allows you to adjust the displacements connected to these output shafts to any interval. However, since each gear system'row always maintains the same state regardless of the displacement of the output shaft, a single motor is used.]} Two talented gas cleaners are driven to rotate. It is possible to rotate the drive in a circular motion without causing any trouble.

Λ, V / IPO As for the support device of the earth auger drive device, the bracket with the slide bracket on the back of the holder of the drive unit was removed and fixed freely, so the guide pipe can be replaced only by replacing the bracket. It is possible to mount the drive unit for various readers and stores with different mounting intervals, but when mounting the bracket, use the guide on the back of the holder]? Since the core is specified, it can be aligned reliably. Therefore, it is extremely effective in practical use, such as abnormal wear of the slide metal fittings or guide pipes due to bracket music. be .

Sa-ra: Multi-talented — The space-stabilizing sword that can be used for ga is a rotatably outer cylinder that allows each cylinder to rotate in the middle of multiple excavations.

, A protrusion is provided on the outer periphery of each cylinder toward the adjacent cylinder, and a plurality of through holes are made in this protrusion in the parallel direction of the excavation opening, and they face each other. Since the gap between the excavation openings is kept constant by attaching a fitting to the through holes of the two protrusions with a bolt, etc., even if the interval between the excavation openings is changed. It is sufficient to select the through hole of the protrusion as appropriate for the through hole of the connector and tighten it with a bolt, etc., and every time the excavation opening interval is changed in the conventional interval setting device. It is extremely effective compared to having to prepare a different one each time! ), Its practicality is great. · In addition, the anti-vibration device for multiple augers is equipped with a π-rod guide frame on the front of the lower part of the leader, and this mouth guide — excavates multiple mouth guide holders in the frame. Since the mouthpieces are installed so that they can be moved in the parallel direction, the distance between the excavation degrees is changed. In addition, the rod guide holder can be moved and fixed accordingly, and unlike the conventional anti-vibration device, the cutting rod interval is changed each time. It is extremely effective compared to having to prepare a device, so its practicality is great.

Furthermore, according to the bearing device, there is an excellent effect that sand does not infiltrate into the rotating part in the soil and the smooth rotation of the rotating part can be maintained.

OMPI

. WIPO

Claims

--: --2 Γ ---- Supplement. Corrected claims

(By the International Bureau, March 25, 1980 (25. 03. 80) Volunteer) Multiple August Cru First-class drilling ports at the same time Multiple hard holes were drilled. In this pit. (According to the pit-house) Two drives on the drive shaft connected to the motor in the earth auger that forms an interstitial wall in the ground. Then, connect the gauge shaft to the lower end of each drive gear, and combine the output gears fixed to the output shaft to form two gear series. The internal shaft is mounted on the axle, and the above drive motor is mounted on the upper (motor side) gearbox. In addition, the lower gearbox rotates with respect to the drive shaft. A drive unit is formed in which the distance between the two output shafts is variable, and each output shaft is formed in a long hole formed in the holder in the separation direction of the output shaft. In addition to passing through, a fixing means for fixing this holder and the gearbox at an arbitrary position is provided, and an excavation rod is connected to each output shaft of the drive unit. The Earth Oga.

. 1 22 1

2. On the back of the holder of the drive unit, use a guide] 3 cores are specified, and the bracket is removed and fixed freely, and then the bracket is attached to this bracket.

.— The earth auger described in paragraph 1 of the scope of the patent request with a support device characterized by a fixed slide fitting that engages with the damast's guide pipe.

3. Cylindrical bodies are rotated independently on the shafts of multiple excavated π-dos, and protrusions are projected from the outer periphery of each cylindrical body toward the adjacent cylindrical body. , Multiple through holes are drilled in this protrusion in the parallel direction of the above-mentioned gripping code, and the holes are oriented.

Put a tie in the through hole of the two'projections, etc. ;:-.;: t to keep the distance between each excavation mouth constant :::: Scope of claims ^ 1

4. An excavation opening guide frame is attached to the front of the lower part of the leader, and multiple excavation opening guide holders can be moved to this guide frame in the parallel direction of the excavation opening. Claims equipped with a steady rest device to be installed.

BAD on

5. Bearing members with an annular recess of the required width formed on the outer peripheral body of the shaft of the excavation opening and a series groove formed in the axial direction are placed at both ends of the recess. A fixed bearing with a bearing member such as an oilless metal fitted inside and a seal groove formed in the axial direction at both ends is installed between the above seal receiving members. In the seal chamber formed by the above-mentioned seal receiving member and the seal groove of the fixed bearing facing each other, the seal link'and 0 ring , A floating seal made of oil and fat is installed, and a 0 ring is attached to the V-shaped groove formed on the outer peripheral joint surface of the seal receiving member and the fixed bearing, and the above fixed bearing is a non-rotating body. The scope of the patent claim is that the bearing device is equipped with a bearing device that is connected to the adjacent fixed bearing of the same structure in the case of multiple augers. Bearing

— Susai Ichiga.