JP3071586U - Excavator - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an excavator having a cement milk discharge port switching device capable of flowing a large amount of cement milk while having high reliability. SOLUTION: There is provided a head 1 having a drilling blade 3 and a stirring blade 4, and a drilling unit comprising a rod 2 for transmitting a driving force from a driving motor 45 to the head 1, and the drilling unit is moved up and down. Accordingly, in an excavator capable of forming a vertical hole having a predetermined depth and discharging cement milk when excavating the ground, the excavator is configured to discharge cement milk between the head 1 and the rod 2. An outlet switching device 5 is provided, and the above-mentioned cement milk outlet switching device is configured to control the inflow-side member 8 and the discharge-side member 9 rotatably connected to each other, and the rotation range of the discharge-side member 9 with respect to the inflow-side member 8. A cement mechanism for restricting the milk within a predetermined range, and utilizing a difference in position between the inflow-side member 8 and the discharge-side member 9 due to a difference in rotational direction transmitted to the discharge-side member 9 to discharge cement milk. Switching is performed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an excavator, and more particularly, to an excavator having a cement milk outlet switching device between a head and a rod.

[0002]

[Prior art]

 As is well known, various excavators are used in the foundation work at construction work sites and civil engineering work sites for embedding ready-made piles and forming column piles. The machine is composed of a head having excavating wings for excavating the ground and a stirring wing for stirring the excavated earth and sand, and a rod (such as a screw-wound rod) for transmitting driving power from a driving motor to the head. A vertical hole having a predetermined depth is formed by raising and lowering the above-mentioned excavating means along a mast supported while standing upright on the self-propelled vehicle.

[0003] When excavating using the above-described excavator, the peripheral wall of the vertical hole formed by excavation is prevented from collapsing, and at the same time, the excavated earth and sand is smoothly discharged, or the excavation of soft ground is performed. For the purpose of improvement, drilling is performed while discharging cement milk, and the drilled vertical hole is filled with a mixture of cement milk and drilled earth and sand.

[0004] Furthermore, the above-mentioned cement milk can also function as a lubricating material for preventing abrasion of the cutting blades provided on the excavating wing, so that during excavation, the cement milk is directed toward the tip of the head. It is preferable that the milk be discharged, and that the milk be discharged toward the side of the head in order to uniformly mix the excavated earth and sand and the cement milk during stirring and drawing.

In order to discharge the cement milk toward the tip of the head at the time of excavation and to discharge the cement milk toward the side of the head at the time of stirring / pulling, the head and the rod are discharged. It has been practiced to incorporate a discharge port switching device equipped with a piston valve and a three-way valve between the piston valve and the three-way valve. An operation lever for switching, and a wing-shaped pressure receiving plate for moving the operation lever, are provided with a mixture of earth and sand and earth and sand and cement milk present around the discharge port switching device when the head and rod rotate. The resistance is received by the pressure receiving plate, and the operation lever is moved using this force to switch the switching valve.

In order to discharge the cement milk toward the tip of the head during excavation and to discharge toward the side of the head during agitation and withdrawal, the cement milk is provided with a discharge port at the tip. Some cement milk channels are formed in the rod and on the head to connect independently to each of the side discharge ports, and the discharge port is switched.In this case, the cement milk is located above the rod. The discharge port is switched by switching the cement milk flow path for supplying cement milk at the supply unit.

[0007]

[Problems to be solved by the invention]

 According to the above-mentioned conventional technology, when excavating using an excavator, cement milk is discharged from a bottom discharge port formed at the tip of the head during excavation, and the side of the head is discharged during stirring and pulling. Cement milk can be discharged from the side discharge port formed in the head, but in the case of a piston valve or a three-way valve incorporated between the head and the rod, when the head and the rod rotate. The resistance caused by earth and sand and the mixture of earth and sand and cement milk present around the discharge port switching device is received by the pressure receiving plate, and this force is used to move the operation lever to switch the switching valve. Depending on the type of earth and sand, sufficient resistance cannot be obtained, and the operation lever will not move due to the pressure receiving plate, or the pressure receiving plate itself will not operate, and the switching valve will switch. There is a bug occurs worry about, such as not, was Tsu Der unreliable.

Further, when the cement milk flow path formed in the rod is divided into two systems, the discharge port can be switched by the cement milk supply unit located above the rod, so that the discharge port can be switched. However, when two cement milk channels are formed in the rod, it is necessary to prepare a dedicated rod and a dedicated head formed in a double pipe, In addition to the cost increase, if two cement milk flow paths are formed in the rod, the flow cross section of each cement milk flow path will be small, so a large flow of cement milk will be required. There was a problem that it was not possible.

Therefore, the present invention is to solve the above-mentioned problem, and provides an excavator having a cement milk discharge port switching device capable of flowing a large amount of cement milk while having high reliability. The purpose is to provide.

[0010]

[Means for solving the problem]

 In order to achieve the above object, the present invention has the following technical means. That is, there is provided a head 1 having an excavating blade 3 and a stirring blade 4 and an excavating means comprising a rod 2 for transmitting a driving force from a driving motor 45 to the head 1. By raising and lowering along the mast 42 supported by the traveling vehicle 41, a vertical hole of a predetermined depth is formed, and when excavating the ground by the excavator means, the cement milk formed in the rod 2 is excavated. An excavator capable of discharging the cement milk supplied through the flow path 34 to either the tip portion of the head 1 or the side portion of the head 1, wherein the excavator includes a head 1 and a rod. 2 and a bottom discharge port 6 for discharging cement milk to the tip of the head 1 or a side discharge port 7 for discharging cement milk to the side of the head 1. A cement milk discharge port switching device 5 for switching to any of the above is provided. The cement milk discharge port switching device 5 includes an inflow-side member 8 located on the side where cement milk is supplied, and a bottom discharge device for cement milk. The inflow-side member 8 and the discharge-side member 9 are formed by the discharge-side member 9 positioned on the side leading to the outlet 6 or the side discharge port 7. The shaft 11 formed in the inflow-side member 8 is connected to the discharge-side member 9. The discharge side member 9 is rotatably connected to the inflow side member 8 by being fitted in a fitting hole 21 formed in the inflow side member 8 with respect to the inflow side member 8. A clutch mechanism including keys 13 and 23 and a key groove 19 for regulating the rotation range to a predetermined range is provided, and the rotation F during excavation is transmitted from the inflow-side member 8 to the discharge-side member 9 by the clutch mechanism. In this state, the cement milk supplied through the cement milk flow passage 34 of the rod 2 is guided to the bottom discharge port 6, and the rotation R at the time of stirring and pulling out by the clutch mechanism is reduced. When the milk is being transmitted from the inflow side member 8 to the discharge side member 9, the cement milk supplied through the cement milk flow passage 34 of the rod 2 is guided to the side discharge port 7. By using the difference in the position of the discharge side member 9 with respect to the inflow side member 8 determined by the clutch mechanism based on the rotation direction transmitted from the inflow side member 8 to the discharge side member 9, the discharge port of the cement milk is formed. An excavator characterized in that the excavator can be switched to either the bottom discharge port 6 or the side discharge port 7.

The present invention comprises the above-mentioned technical means, and connects the inflow-side member 8 and the discharge-side member 9 constituting the discharge switching device 5 of the cement milk included in the excavator so as to be rotatable and at the same time, A clutch mechanism is interposed between the side member 8 and the discharge side member 9 to restrict the rotation range of the discharge side member 9 with respect to the inflow side member 8 to a predetermined range. In order to switch the cement milk discharge port by utilizing the difference in the positions of the two due to the difference in the rotation direction transmitted to the head 1, the rod 2 for transmitting the driving force of the driving motor to the head 1 is used. Only by changing the rotation direction, that is, by changing the rotation direction of the driving motor 45, the discharge port of the cement milk can be switched. In addition, the structure of the discharge port switching device 5 for the cement milk is abnormal. As well as being simple, it is not affected by the surrounding earth and sand or the mixture of earth and sand and cement milk, so high reliability can be obtained.

Furthermore, by incorporating the cement milk discharge port switching device 5 between the head 1 and the rod 2, the cement milk flow passage 34 formed in the rod 2 becomes only one system. A cement milk discharge port switching device that can use a single pipe rod 2, can secure a large flow path cross section, has high reliability, and can flow a large amount of cement milk at the same time. An excavator equipped with it can be obtained.

[0013]

[Embodiment of the invention]

 Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the excavator according to the present invention includes a head 1 having an excavator blade 3 for excavating the ground and an agitator blade 4 for agitating excavated earth and sand and cement milk. A digging means comprising a rod 2 for transmitting a driving force from a driving motor 45 to the head 1, wherein the digging means extends along a mast 42 supported upright on a self-propelled vehicle 41. It is configured to be able to move up and down.

The mast 42 includes a guide rail 43 for moving the excavating means up and down along the mast 42, an elevating body 44 moving on the guide rail 43, and an excavating means moving up and down along the mast. A swing stopper 46 for preventing the rod 2 from swinging is provided, and a drive motor 45 for driving the head 1 constituting the excavating means is attached to the elevating body 44, and the drive motor 45 The excavating means is raised and lowered by moving the excavating means together with the elevating body 44 to form a vertical hole of a predetermined depth.

Further, when the ground is excavated by the excavator means, a cement milk supply pipe 47 which is connected to a cement milk supply device (not shown) and guides the cement milk to an upper portion of the driving motor 45. Is supplied through a cement milk channel 34 (see FIG. 3) formed in the rod 2 to the head 1 or to the side of the head 1. The excavating means incorporates a cement milk switching device 5 for switching a cement milk discharge port.

The cement milk discharge port switching device 5 is incorporated between the head 1 and a rod 2 that transmits a driving force from a driving motor 45 to the head 1. A cement milk supplied through a cement milk channel 34 formed in the rod 2 for discharging the cement milk to the tip of the head 1. The liquid is guided to the bottom discharge port 6 or the side discharge port 7 for discharging the cement milk to the side of the head 1 to switch the discharge port of the cement milk.

As shown in FIGS. 2 and 3, the excavator shown in the present embodiment has two sets of excavating means on the normal rotation side and the reverse rotation side. The head 1 constituting each of the excavating means on the side and the reverse side is connected to each other by a connecting member 36, and the discharge port switching device 5 for cement milk is provided with the excavating means on the normal side and the reverse side. Each of them is incorporated, but hereinafter, the cement milk discharge port switching device 5 incorporated in the excavating means on the forward rotation side (the right side in FIGS. 2 and 3) will be described.

As shown in FIG. 4, the cement milk discharge port switching device 5 includes an inflow-side member 8 for receiving cement milk supplied through a cement milk flow path 34 of the rod 2, and an inflow-side member 8. And a discharge-side member 9 for guiding the cement milk to the bottom discharge port 6 or the side discharge port 7. A ring-shaped member 10 is connected to the connection portion between the inflow-side member 8 and the discharge-side member 9. Is installed to prevent intrusion of earth and sand into the connection.

The inflow-side member 8 and the outflow-side member 9 that constitute the above-mentioned cement milk discharge-port switching device 5 are configured such that the shaft portion 11 formed in the inflow-side member 8 is fitted to the discharge-side member 9. The connection is made by fitting into the mating hole 21, and the inflow side member 8 can be rotated within a predetermined range around the shaft portion 11 of the discharge side member 9.

Further, a male joint 12 is formed on the inflow-side member 8, and a female joint 22 is formed on the discharge-side member 9, and a male joint 29 and a rod 2 formed at the upper end of the head 1 are formed. The female joint 30 formed at the lower end is configured to be easily and reliably assembled.

As shown in FIGS. 5, 6, and 7, the inflow-side member 8 constituting the cement milk discharge port switching device 5 has a shaft 11 formed on the same axis as the male member. And a flange portion 20 having a key 13 and a key groove 19 formed between the shaft portion 11 and the male joint 12.

Further, the male joint 12 and the shaft portion 11 are formed with a cement milk inflow passage 14 connected to a cement milk flow passage 34 of the rod 2 on a central axis. 5 is branched into a bottom discharge port introduction passage 15 and a side discharge port introduction path 16, and the bottom discharge port introduction path 15 has an outlet at a position away from the central axis of the shaft portion 11. The side discharge port introduction passage 16 is formed radially so as to open from the bottom discharge port introduction passage 15 to the peripheral surface of the shaft portion 11.

In addition, lock grooves 17 and 18 are formed in the shaft portion 11 and the male joint portion 12 so that positioning and fixing at the time of connection can be reliably performed.

As shown in FIGS. 8, 9 and 10, the discharge side member 9 includes a fitting hole 21 and a female joint 22 formed on the same axis. Around the periphery, a key 23 accommodated in a key groove 19 formed in the inflow side member 8 is provided.

A bottom discharge port connecting passage 24 is formed between the fitting hole 21 and the male joint receiving portion 26 of the female joint 22, and a bottom discharge port formed in the inflow side member 8 is formed. The cement milk guided by the outlet introduction passage 15 is discharged from the bottom discharge port 6 formed at the front end of the head 1. The inlet of the bottom discharge port connection passage 24 is connected to the bottom discharge port introduction passage. Similarly to the outlet 15, the outlet 15 is located at a position away from the central axis so as to coincide with the bottom outlet introduction passage 15 at a predetermined position. , Located on the central axis for feeding the cement milk to the bottom outlet 6.

Further, a side discharge port 7 is formed on the peripheral surface of the discharge side member 9, and is fitted into the fitting hole 21 between the side discharge port 7 and the fitting hole 21. A side discharge port connection passage 25 is formed which coincides with a side discharge port introduction passage 16 formed in the shaft portion 11 of the inflow side member 8 at a predetermined position.

In addition, a lock pin insertion hole 27 for positioning a lock pin in a lock groove 17 formed in the shaft portion 11 of the inflow side member 8 is formed in the discharge side member 9. A similar lock pin insertion hole 28 is formed in the female joint.

Further, fitting portions 31 and 32 are formed in the connection portion between the inflow-side member 8 and the discharge-side member 9 so as to fit the ring-shaped member 10 for preventing intrusion of earth and sand into the connection portion. I have.

Then, the inflow-side member 8 and the discharge-side member 9 configured as described above are connected, that is, the shaft 11 of the inflow-side member 8 is fitted into the fitting hole 21 of the discharge-side member 9, and is rotated. By positioning and fixing as much as possible, the discharge port switching device 5 for cement milk is formed, and at this time, the key 23 of the discharge side member 9 is inserted into the key groove 19 formed in the inflow side member 8. The clutch mechanism is formed so that the key groove 19 can be moved within the movable range, and the relative position between the inflow-side member 8 and the discharge-side member 9 can be changed within the movable range.

The discharge port switching device 5 for cement milk switches the discharge port of cement milk by using a relative position change of the discharge side member 9 with respect to the inflow side member 8. The change in the relative position of the discharge-side member 9 with respect to the inflow-side member 8 is caused by a change in the rotation direction of the head 1, that is, the positional relationship between the key 13 of the inflow-side member 8 and the key 23 of the discharge-side member 9 (rotation transmission). Position), the key 13 of the inflow-side member 8 and the key 23 of the discharge-side member 9 in the rotation direction at the time of excavation (arrow F in FIG. 12) and the rotation direction at the time of stirring and pulling (arrow R in FIG. 14). Based on the positional relationship, the bottom discharge port introduction passage 15 and the side discharge port introduction passage 16 formed in the inflow side member 8 and the bottom discharge port connection passage 24 and the side discharge port connection formed in the discharge side member 9. The position of passage 25 is decided (The above positional relationship is shown in the description of the operation described below.)

Next, the operation of the cement milk discharge port switching device 5 provided in the excavator of the present invention based on the above configuration will be described. First, the state when the excavator is excavating will be described. The rotation F of the head 1 during excavation is transmitted from the key 13 of the inflow-side member 8 to the key 23 of the discharge-side member 9. At this time, the cement milk discharge port switching device 5 is formed in the bottom discharge port introduction passage 15 formed in the inflow side member 8 and the discharge side member 9 as shown in FIGS. At the same time that the bottom discharge port connection passage 24 communicates with the bottom discharge port connection passage 24, the side discharge port introduction passage 16 formed in the inflow side member 8 and the side discharge port connection passage 25 formed in the discharge side member 9 are connected. The cement milk is not communicated, and the cement milk is guided from the cement milk flow passage 34 of the rod 2 to the bottom discharge port 6 through the inflow passage 14, the bottom discharge outlet introduction passage 15, and the bottom discharge port connection passage 24. Tip of pad 1 It is discharged against.

Next, excavation by the excavator is completed, the excavated earth and sand and cement milk are stirred, and when the head 1 is pulled out, the head 1 is rotated R in the direction opposite to the direction of the excavation. Due to the rotation R, the key 23 of the discharge-side member 9 moves in the key groove 19 of the inflow-side member 8, and rotates from the key 13 of the inflow-side member 8 to the key 23 of the discharge-side member 9 at a position opposite to the time of excavation. R is transmitted.

At this time, as shown in FIG. 13 and FIG. 14, the cement milk discharge port switching device 5 includes a side discharge port introduction passage 16 formed in the inflow side member 8 and a discharge side member. 9 is connected to the side discharge port connection passage 25 formed in the inlet member 9, and at the same time, the bottom discharge port introduction passage 15 formed in the inlet side member 8 and the bottom discharge port connection passage formed in the discharge side member 9 are connected. The passage 24 is not communicated with the cement milk, and the cement milk flows from the cement milk flow path 34 of the rod 2 through the inflow passage 14, the side discharge port introduction passage 16, and the side discharge port connection passage 25 to the side discharge port. 7 and is discharged to the side of the head 1.

As described above, the switching of the cement milk discharge port in the cement milk discharge port switching device 5 provided in the excavator of the present invention is performed simultaneously with the switching of the rotation direction of the head 1 and the rod 2. It is possible to switch the cement milk discharge port only by switching the rotation direction of the head 1 and the rod 2, that is, by switching the excavator from the excavation operation to the stirring / pulling-out operation.

Further, the above-mentioned cement milk discharge port switching device 5 has a very simple structure, can be manufactured at low cost, and the discharge side member 9 is in a predetermined range with respect to the inflow side member 8. In addition to being able to reliably switch the discharge port of cement milk by simply changing the relative position just by rotating the cement milk, it is also possible to change the discharge port switching device for cement milk and the mixture of earth and sand and soil and cement milk existing around the device 5. It has high reliability because it is not affected by the noise.

In addition, only one cement milk flow passage 34 for passing the cement milk formed in the rod 2 is required, and a single pipe rod can be used. The road cross section can be enlarged and a large amount of cement milk can flow.

Further, since the passage for guiding the cement milk to the bottom discharge port 6 is substantially linearly secured, the pressure loss when switching the discharge port of the cement milk can be minimized.

The above is the first embodiment of the cement milk discharge port switching device provided in the excavator of the present invention. Next, the second embodiment will be described. In the second embodiment, only the portions different from the cement milk discharge port switching device provided in the excavator of the above-described first embodiment will be described, and the description of the common portions will be omitted.

As shown in FIGS. 15 and 17, the excavator according to the present embodiment has a cement milk discharge port switching device including a shaft of an inflow side member 8 constituting a cement milk discharge port switching device 5. The part 11 is provided with an inflow passage 14 connected to the cement milk flow path 34 of the rod 2 and a discharge port switching path 33 opening from the inflow path 14 to the peripheral surface of the shaft portion 11. The bottom discharge port connection passage 24, which can communicate with the discharge port switching path 33 provided in the shaft section 11 of the inflow side member 8, and the discharge port switching path 33. A possible side discharge port connection passage 25 is provided.

The discharge port switching passage 33 corresponds to the terminal end of the cement milk inflow passage 14 connected to the cement milk passage 34 of the rod 2, and is formed on the central axis of the shaft portion 11. It is formed radially so as to open from the formed inflow passage 14 to the peripheral surface of the shaft portion 11.

Further, the bottom discharge port connection passage 24 is connected to the bottom discharge port 6 through the inside of the side wall of the discharge member 9, and goes from the fitting hole 21 to the peripheral surface of the discharge member 9. A radial portion, an extended portion extending from the radial portion in the side wall of the discharge-side member 9 in the axial direction, and a portion connected from the extended portion to the bottom discharge port 6. The portion is configured to coincide with a discharge port switching passage 33 formed in the shaft portion 11 fitted in the fitting hole 21 at a predetermined position. In the present embodiment, the above-mentioned radial portion is formed from the peripheral surface of the discharge-side member 9 in order to facilitate the formation of the bottom discharge port connection passage 24. It is closed at 35.

As in the first embodiment, the side discharge port connection passage 25 opens in the side discharge port 7 formed on the peripheral surface of the discharge side member 9 and the peripheral surface of the shaft portion 11. The discharge port is connected to the switching passage 33, and is formed radially from the fitting hole 21 toward the side discharge port 7, and is formed in the shaft portion 11 fitted in the fitting hole 21. The outlet switching passage 33 is configured to coincide with a predetermined position.

Next, the operation of the discharge switching device 5 of the cement milk provided in the excavator shown in the second embodiment based on the above configuration will be described. First, the state during excavation by the excavator will be described. The rotation F of the head 1 during excavation is transmitted from the key 13 of the inflow side member 8 forming the clutch mechanism to the key 23 of the discharge side member 9. As shown in FIGS. 15 and 16, the discharge port switching passage 33 formed in the inflow-side member 8 and the bottom discharge port connection passage 24 formed in the discharge-side member 9 communicate with each other. At the same time, the discharge-port switching passage 33 and the side discharge-port connecting passage 25 formed in the discharge-side member 9 are not in communication with each other. The liquid is guided to the bottom discharge port 6 through the passage 14, the bottom discharge port introduction path 15, and the bottom discharge port connection path 24, and is discharged to the tip portion of the head 1.

Next, after the excavation by the excavator is completed, the excavated earth and sand and the cement milk are stirred, and when the head 1 is pulled out, the head 1 is rotated R in the direction opposite to the direction of the excavation. Due to this rotation R, the key 23 of the discharge-side member 9 constituting the clutch mechanism moves in the key groove 19 of the inlet-side member 8, and thereafter, the key 13 of the inflow-side member 8 at a position opposite to the time of excavation. The rotation R of the head 1 at the time of the agitation and withdrawal is transmitted to the key 23 of the discharge side member 9 from the discharge side member 9. As shown in FIGS. At the same time that the outlet switching passage 33 and the side discharge port connection passage 25 formed on the discharge side member 9 are in communication with each other, the discharge port switching passage 33 and the bottom discharge port connection passage 24 formed on the discharge side member 9 are simultaneously connected. Is not in communication with Ment milk is guided from the cement milk flow path 34 of the rod 2 to the side discharge port 7 through the inflow passage 14, the side discharge port introduction path 16, and the side discharge port connection path 25, and to the side of the head 1. It is discharged to.

[0045] Also in the second embodiment, an excavator having the cement milk discharge port switching device 5 having the same advantages as the first embodiment can be obtained. Since the passages constituting the milk outlet switching device 5 can be formed more easily than in the first embodiment, the cost reduction of the cement milk outlet switching device 5 provided in the excavator can be realized. .

[0046]

[Effect of the invention]

 As described in detail above, the present invention has the following effects. That is, according to the first aspect, the cement milk discharge port switching device provided in the excavator of the present invention switches the cement milk discharge port by changing the rotation direction of the excavator head, that is, excavating the excavator. It can be carried out reliably simply by switching from work to stirring / pulling-out work.In addition to its extremely simple structure, it is not affected by the surrounding earth and sand or the mixture of earth and sand and cement milk. It is hard to cause failure or malfunction, has high reliability, and requires only one system of cement milk flow passage for the rod to supply cement milk. Equipped with a cement milk discharge port switching device that can flow milk and therefore has high reliability and at the same time can flow a large amount of cement milk Excavator is provided.

According to the second aspect, it is possible to minimize the pressure loss when switching the discharge port of the cement milk, and to switch the discharge port of the cement milk suitable for discharging the cement milk at a large flow rate. An excavator with the device is provided.

Further, according to the third aspect, there is provided an excavator provided with a cement milk discharge port switching device capable of reducing the production cost at a low cost.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of an excavator according to the present invention.

FIG. 2 is a left side view in FIG. 1 showing a configuration of the excavator of the present invention.

3 is a partially enlarged view of FIG. 2 showing an assembling position of a cement milk discharge port switching device provided in the excavator of the present invention.

FIG. 4 is an exploded perspective view showing a configuration of a cement milk discharge port switching device provided in the excavator of the present invention.

FIG. 5 is a front view of an inflow-side member constituting a cement milk discharge port switching device provided in the excavator according to the first embodiment (FIG. 4);
FIG.

FIG. 6 is a left side view in FIG.

FIG. 7 is a right side view in FIG.

FIG. 8 is a front view of a discharge-side member constituting a discharge port switching device for cement milk provided in the excavator according to the first embodiment.

FIG. 9 is a right side view in FIG.

FIG. 10 is a left side view in FIG.

FIG. 11 is a front view showing an operation state of the cement milk discharge port switching device provided in the excavator according to the first embodiment during excavation.

12 is a sectional view taken along line AA ′ in FIG.

FIG. 13 is a front view illustrating an operation state of the cement milk discharge port switching device included in the excavator according to the first embodiment at the time of withdrawal.

FIG. 14 is a cross-sectional view taken along line BB ′ in FIG.

FIG. 15 is a front view (an operating state at the time of excavation) showing a cement milk discharge port switching device provided in the excavator of the second embodiment.

FIG. 16 is a sectional view taken along the line CC ′ in FIG.

FIG. 17 is a front view (an operation state at the time of pulling out) showing a cement milk discharge port switching device provided in the excavator according to the second embodiment.

18 is a sectional view taken along line DD ′ in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 2 Rod 3 Drilling blade 4 Stirring blade 5 Cement milk discharge port switching device 6 Bottom discharge port 7 Side discharge port 8 Inflow side member 9 Discharge side member 10 Ring member 11 Shaft section 12 Male joint 13 Key 14 Inflow passage 15 Bottom discharge port introduction passage 16 Side discharge port introduction passage 17, 18 Lock groove 19 Key groove 20 Flange part 21 Fitting hole 22 Female joint 23 Key 24 Bottom discharge port connection path 25 Side discharge port connection path 26 Male joint receiving Part 27, 28 Lock pin insertion hole 29 Male joint at upper end of head 30 Female joint at lower end of rod 31, 32 Fitting groove 33 Discharge port switching passage 34 Cement milk flow passage 35 Cap 36 Connecting member 41 Self-propelled vehicle 42 Mast 43 Guide Rail 44 Lifting body 45 Driving motor 46 Steady member 47 Cement milk supply pipe

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koichi Shinozaki 2-20-10 Nakata Minami, Izumi-ku, Yokohama-shi, Kanagawa

Claims (3)

[Utility model registration claims] An excavating means comprising a head having an excavating blade and a stirring blade, and a rod for transmitting a driving force from a driving motor to the head. Mast 42 supported by self-propelled vehicle 41
And a vertical hole having a predetermined depth is formed, and when the ground is excavated by the excavator means, the cement supplied through a cement milk flow path 34 formed in the rod 2 is formed. In an excavator capable of discharging milk to either the tip portion of the head 1 or the side portion of the head 1, the excavator is provided between the head 1 and the rod 2 at a tip portion of the head 1. A cement milk discharge port switching device 5 for switching to either a bottom discharge port 6 for discharging cement milk or a side discharge port 7 for discharging cement milk to the side of the head 1. The cement milk discharge port switching device 5 includes an inflow-side member 8 located on the side where cement milk is supplied, and a cement milk bottom discharge port 6 or side. The discharge-side member 9 is located on the side leading to the discharge port 7.
Are fitted to a fitting hole 21 formed in the discharge side member 9 so as to be rotatable with each other, and between the inflow side member 8 and the discharge side member 9, A clutch mechanism including keys 13 and 23 and a key groove 19 for regulating the rotation range of the discharge-side member 9 to a predetermined range is provided. When being transmitted to the member 9, the cement milk flow path 3
4 is guided to the bottom discharge port 6 and further stirred and stirred by the clutch mechanism.
When the rotation R at the time of drawing is transmitted from the inflow side member 8 to the discharge side member 9, the cement milk supplied through the cement milk flow path 34 of the rod 2 is transferred to the side discharge port 7. By using a difference in the position of the discharge-side member 9 with respect to the inflow-side member 8 determined by the clutch mechanism based on the rotation direction transmitted from the inflow-side member 8 to the discharge-side member 9, the cement is formed. An excavator wherein the milk outlet is switched to either the bottom outlet 6 or the side outlet 7. 2. The discharge port switching device 5 for cement milk.
The shaft portion 11 of the inflow-side member 8 is connected to the cement milk flow path 34 of the rod 2 and is supplied with cement milk, and the end of the shaft portion 11 branched from the inflow passage 14. A bottom discharge port introduction passage 15 that opens at a position away from the central axis in the portion and a side discharge port introduction passage 16 that branches off from the inflow passage 14 and opens on the peripheral surface of the shaft portion 11 are provided. The discharge-side member 9 constituting the discharge switching device 5 for cement milk can communicate with the bottom discharge port introduction passage 15 and is connected to the bottom discharge port 6, a bottom discharge port connection passage 24, A side discharge port connection passage 25 is provided, which can communicate with the side discharge port introduction passage 16 and is connected to the side discharge port 7 formed on the peripheral surface of the discharge side member 9. When the rotation F at the time of excavation is transmitted from the inflow-side member 8 to the discharge-side member 9 by the structure, the bottom discharge port introduction passage 15 and the bottom discharge port connection passage 24 communicate with each other, and the side discharge port is connected. The introduction passage 16 and the side discharge port connection passage 25 do not communicate with each other, and the cement milk supplied through the cement milk flow path 34 of the rod 2 is guided to the bottom discharge port 6, and further, the stirring and stirring is performed by the clutch mechanism. When the rotation R at the time of drawing is transmitted from the inflow side member 8 to the discharge side member 9, the side discharge port introduction passage 16 and the side discharge port connection passage 25 communicate with each other, and the bottom discharge port introduction passage is formed. The passage 15 and the bottom outlet connection passage 24 do not communicate with each other.
Excavator according to claim 1, characterized in that the cement milk supplied through the excavator is arranged to be guided to the side discharge opening (7). 3. The discharge port switching device 5 for the cement milk.
The shaft portion 11 of the inflow-side member 8 is connected to the cement milk flow passage 34 of the rod 2 and is supplied with cement milk. A discharge port switching passage 33 that opens on the peripheral surface is provided, and the discharge side member 9 that constitutes the cement milk discharge port switching device 5 can communicate with the discharge port switching path 33. The bottom discharge port connection passage 24 connected to the bottom discharge port 6 through the inside of the side wall of the discharge side member 9 and the discharge port switching passage 33 are formed on the peripheral surface of the discharge side member 9. A side discharge port connection passage 25 connected to the side discharge port 7 is provided, and when the rotation F during excavation is transmitted from the inflow side member 8 to the discharge side member 9 by the clutch mechanism. , The vomit above The mouth switching passage 33 communicates with the bottom discharge port connection passage 24, and the discharge port switching passage 33 does not communicate with the side discharge port connection passage 25, and the cement supplied through the cement milk flow passage 34 of the rod 2 When the milk is guided to the bottom discharge port 6 and the rotation R at the time of stirring / withdrawing is transmitted from the inflow side member 8 to the discharge side member 9 by the clutch mechanism, the discharge port switching passage 33 is While the side discharge port connection passage 25 communicates,
The discharge outlet switching passage 33 and the bottom discharge outlet connection passage 24 do not communicate with each other, and the cement milk supplied through the cement milk flow passage 34 of the rod 2 is guided to the side discharge outlet 7. The excavator according to claim 1, wherein: