JP2506035Y2 - Pile driving device for reinforcing piles for civil engineering work - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for piling a reinforcing pile on a rock in a civil engineering work in a tunnel, for example, and is a technique for preventing an operator from receiving a reaction force during the piling work.

[0002]

2. Description of the Related Art Generally, in the case of civil engineering work for strengthening rock or soft ground in a tunnel, a cement column is constructed by injecting a cementing agent such as cement milk into the target rock or ground, Reinforcement piles such as reinforcing bars are driven into the cement columns before consolidation with a pile driving device to strengthen the cement column row.

The pile driving device targeted by the present invention relates to a device having a basic structure as described below. For example, as shown in FIG. 1 or FIG. 12, the receiving port 6 of the pile driver 1
Of the drive roller 3 and the pinch roller 4 are arranged to face each other with a space 5 between them.
Is interlocked with the roller drive source 8, and the reinforcing pile 10 carried in from the receiving port 6 is pinched by the roller pinching path 2 and carried out from the delivery port 7.

In this basic structure, the conventional pile driving device is a large one assembled into a tower-shaped body, and it is actually opened.
There is one described in Japanese Patent Publication No. 2-129436. As shown in FIG. 12, the tower-shaped body 50 is mounted on a carriage 53, and a pair of guide rollers 51 are mounted on an upper portion 50a of the tower-shaped body 50.
The receiving opening 6 in which the 52 is arranged is located at the lower part 50b.
The roller pinching path 2 to the lower part 50c of the outlet port 7
Are arranged respectively. Then, the carriage 53 is moved above the soil cement pillar row formed in the soft ground,
Reinforcement piles (reinforcing bars here) 10 are sent downward from the upper part of the tower-shaped body 50, and the reinforcing bars 1 are placed at predetermined positions in the soil cement column row.
Type 0. In this case, the reaction force when the reinforcement pile 10 is driven into the ground is received by the weight of the device.

[0005]

[Problems to be Solved by the Invention] However, when strengthening rock in a narrow space such as a tunnel, the above-mentioned large device cannot be brought in, and therefore pile driving must be done manually. There was a problem of low work efficiency.

Therefore, the inventor of the present invention first thought of constructing the pile driving device as a handheld device like a small rock drill, and carrying it in a tunnel for work. However, in this case, since the worker receives the reaction force at the time of driving the pile, the worker is greatly tired, and there is room for improvement in improving work efficiency. An object of the present invention is to provide a small pile driving device having high work efficiency.

[0007]

In order to achieve the above object, the present invention has the following improvements to the basic structure. For example, as shown in FIG. 1 to FIG. 4 and FIG. 9 to FIG. 11, or as shown in FIG. 5 to FIG. 8, the feed port 7 of the pile driving machine 1 is provided with a holding part 12 for rock mass and a holding part 12 for rock mass. Is composed of a holding portion main body 14, a temperature-sensitive operating member 16 and a heater 17, the holding portion main body 14 is formed along the advancing direction A of the reinforcing pile 10, and is formed on the outer surface 15 of the holding portion main body 14. The temperature sensitive operating member 16 is arranged. The temperature sensitive operating member 16 is orthogonal to the advancing direction A by the heating of the heater 17 and is in an outward position B and is orthogonal to the expanding position P when the heater 17 is cooled. The contraction position Q is closed to the inward direction C, and the position switching operation is possible. The temperature-sensitive operating member 16 may be an element itself such as a shape memory alloy, a bimetal, or a thermowax, or may be an operating member configured by incorporating each element as an actuator.

[0008]

For example, in the rock mass reinforcement work of a tunnel, when the holding part 12 for rock mass of the pile driver 1 is inserted into the opening part of the rock mass into which the solidifying agent such as cement milk is injected and the heater 17 is heated, The temperature-sensitive operating member 16 arranged on the outer surface 15 of the holding portion main body 14 is expanded to the expanded position P and pressed against the peripheral wall of the above-mentioned opening portion, so that the entire pile driver 1 is fixed to the bedrock. When the driving roller 3 is rotationally driven in this state and the pile driving work is performed, the reaction force of the pile driving is received by the peripheral wall of the rock hole through the holding portion 12 for rock mass and is not transmitted to the worker. On the other hand, when the temperature-sensitive operating member 16 is cooled and switched to the contracted position Q, the pressing contact state of the temperature-sensitive member 16 with respect to the peripheral wall of the open hole of the rock is released. As a result, the holding portion 12 for rock mass can be removed from the opening of the rock mass.

[0009]

[Effects of the Invention] The present invention has the following effects since it is constructed and operates as described above. By switching the temperature-sensitive operating member from the contracted position to the expanded position, the reaction force at the time of pile driving is received by the bedrock and is not transmitted to the worker, so that the fatigue of the worker is reduced and the pile driving work can be performed efficiently.
Moreover, the pile driving device of the present invention can be implemented at a low cost because it has a simple structure in which a holding portion for rock mass is provided at the feed port of the pile driving machine.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional side view of a pile driving device showing Embodiment 1,
2 is a plan view of the pile driving device, FIG. 3 is a rear view of the pile driving device, and FIG. 4 is a schematic explanatory view of a pinch roller elastic force mechanism of the pile driving device.

As shown in FIGS. 1 to 3, the pile driving device has a receiving opening 6 opened at the rear of the laterally-arranged cylindrical pile driving machine 1 and a delivery opening 7 opened at the front thereof. A roller pinching path 2 is formed at the center thereof, and a receiving port 6 is configured to face the delivery port 7 via the roller pinching path 2. As shown in FIG. 1 and FIG. 3, the roller pinching path 2 is provided with pinch rollers 4 at two front and rear positions inside the pile driver 1.
4 is attached and one drive roller 3 is attached below it, and the drive roller 3 and the pinch roller 4 are arranged to face each other with a sandwiching space 5 therebetween.

That is, as shown in FIGS. 1 and 2, a pair of brackets 1 is provided above the front of the casing 18 of the pile driver 1.
9 and 19 are projected upward, a pinch roller elastic pressure device 20 is provided above the rear part of the casing 18, and the pinch rollers 4.4 are rotatably supported between the left and right fixed plates 21 and 21 projected upward. Then, the front portion of the fixed plate 21 is pivotally supported between the brackets 19 and 19 via the hinge pin 22, and the rear portion of the fixed plate 21 is locked to the pinch roller elastic pressure device 20.

The pinch roller elastic pressure device 20 is shown in FIG.
3, as shown in FIG. 3, the screw rod 23 raised from the casing 18, the elastic spring 24 fitted in the screw rod 23, and the screw rod 2
3 and a wing nut 25 screwed together. The receiving plate 26 is horizontally bridged over the rear portions of the fixed plates 21 and 21, the U groove 27 is cut out at the rear end portion of the receiving plate 26, and the screw rod 23 of the elastic pressure device 20 is inserted into the U groove 27. Then, the output portion of the elastic spring 24 is elastically pressed against the lower surface 26b of the receiving plate 26, and the wing nut 25 is tightened on the upper surface 26a of the receiving plate 26.

As shown in FIGS. 1 to 3, an oil motor 8 which is a roller driving source is orthogonally attached to a side surface 18a of a casing 18 of the pile driving machine 1 to drive an output shaft 8a of the oil motor 8. A reinforcing pile (here, a lock bolt) 10 carried into the casing 18 through the receiving port 6 is interlocked with the roller 3 to drive the driving roller 3 of the roller pinching path 2.
While being pinched between the pinch roller 4 and the pinch roller 4, the driving roller 3 is carried out to the front of the pile driving machine 1 from the delivery port 7 by the rotational force.

On the other hand, as shown in FIGS. 1 and 2, a holding portion 12 for bedrock is detachably extended and fixed to a delivery port 7 of the pile driving machine 1 via a fastener 28, and the bedrock The holding portion 12 for the holding portion is composed of a holding portion main body 14, a temperature sensitive operation member 16 and a heater 17. The holding portion main body 14 is formed in a cylindrical shape, and two cylindrical temperature-sensitive operating members 16 are externally fitted in series to the outer peripheral surface 15 of the main body 14, and the inner peripheral surface of the temperature-sensitive operating member 16 is made of silicone. Show the heater 17 composed of a rubber heater.

As shown in FIGS. 9 to 11, the temperature-sensitive operating member 16 has a rectangular shape-memory alloy plate 29 with a large number of slits 30 cut out, and the alloy plate 29 is wound in a cylindrical shape. By turning on / off the heater 17, the expansion position P where the diameter is expanded and the contraction position Q where the diameter is reduced can be switched. That is, the temperature-sensitive operating member 16 is made of, for example, a Ni-Ti alloy,
When heated to a temperature of C, as shown by the solid line in FIG. 10, the central portion bulges in the outer diameter direction B (that is, the direction orthogonal to the advancing direction A of the lock bolt 10) and the shape memory state is obtained.
(Specifically, it is displaced to the expanded position P). On the contrary,
When the temperature-sensitive operating member 16 is cooled, the diameter is reduced in the inner diameter direction C (that is, the inward direction orthogonal to the advancing direction A of the lock bolt 10) as shown by the phantom line in FIG. Switch to position Q. In addition, in FIG. 2 and FIG.
The grip 32 is provided with a heater switch 32a and an oil motor switch (not shown).

Next, the function of the pile driving device according to the first embodiment will be described. (1) For example, in the rock mass reinforcement work of a tunnel, a pile driver 1 is installed in an opening of the rock mass into which a solidifying agent such as cement milk has been injected.
Insert the holding part 12 for rock mass, and switch 32 for the heater.
When a is turned on and the heater 17 is heated, the holder 1
The temperature-sensitive operating member 16 of No. 2 has a
It is opened to the expanded position P and pressed against the peripheral wall of the opening. As a result, the entire pile driver 1 is positioned and fixed to the bedrock.

(2) Switch for oil motor in this state
When the driving roller 3 is rotationally driven by turning on (not shown), the lock bolt 10 pinched by the roller pinching path 2 passes through the inner space of the delivery port 7 and the holding unit main body 14 and It is sent out to the front and pile driving work is started.
In this case, the reaction force of the pile driving is received by the abutting portion between the rock holding portion 12 and the rock hole, and is not transmitted to the worker.

The pinching degree of the lock bolt 10 is adjusted by appropriately adjusting the wing nut 25 of the pinch roller elastic pressure device 20 between the strong pressure position S and the soft pressure position R, as shown in FIG.
This is done by adjusting the swing angle of the fixed plate 21.

(3) When the temperature-sensitive operating member 16 is cooled by turning off the heater switch 32a, the temperature-sensitive member 16 closes to the contracted position Q as shown by the phantom line in FIG. The pressing contact state of the temperature sensitive member 16 with respect to the hole is released, and the anti-rock bed holding portion 12 can be removed from the opening.

5 to 8 show a second embodiment of the present invention,
5 is a vertical sectional side view of the pile driving device, FIG. 6 is a plan view of the pile driving device, FIG. 7 is a rear view of the pile driving device, and FIG. 8 is a schematic explanatory view of a pinch roller elastic force mechanism of the pile driving device. Is. In this pile driving device, the elastic mechanism of the pinch roller in the pile driving device of the first embodiment is replaced with a tightening structure using a wing nut and a rotating structure using an operating lever.

That is, the U-shaped frame 35 is bridged in the center of the fixed plate 21 supporting the pinch rollers 4 to fix the U-shaped frame 35.
The guide rod 36 is raised from above, the upper end portion of the guide rod 36 is internally fitted and supported by the cam-like switching plate 39 of the operation lever 38 via the pivot pin 37, and the switching plate 3
The cam portion 9 is brought into contact with the upper wall 18b of the casing 18, and an elastic spring 40 is interposed between the upper wall 18b and the U-shaped frame 35.

As shown in FIG. 8, when the operation lever 38 is tilted horizontally, the distance K between the pivotal fulcrum 41 on the switching plate 39 and the casing upper wall 18b is shortened, and the pinch roller 4 is moved.
Is pressed downward by the elastic spring 40 and moves to the pressing position T. On the contrary, when the operating lever 38 is raised, the distance L between the pivot 41 and the casing upper wall 18b of the switching plate 39 becomes long, and the pinch roller 4 is pulled up against the elastic spring 40 and switched to the pressing release position W. . By changing the cam shape of the switching plate 39,
The relationship between the switching position of the operation lever 38 and the pressed state of the pinch roller 4 can be reversed.

The present invention may be any one as long as the holding portion 12 for rock mass is provided at the delivery port 7 of the pile driving machine 1 and the temperature sensitive operating member 16 is arranged in the holding portion 12. The form of the temperature-sensitive operating member 16 is not limited to the above-mentioned embodiments,
For example, the radially arranged arm members made of shape memory alloy may be configured to expand, or bimetal or thermowax may be used as the temperature-sensitive operation member instead of the shape memory alloy.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a pile driving device according to a first embodiment.

FIG. 2 is a plan view of the pile driving device.

FIG. 3 is a rear view of the pile driving device.

FIG. 4 is a schematic explanatory view of an elastic pressure mechanism of a pinch roller of the pile driving device.

FIG. 5 is a vertical sectional side view of a pile driving device according to a second embodiment.

FIG. 6 is a plan view of the pile driving device.

FIG. 7 is a rear view of the pile driving device.

FIG. 8 is a schematic explanatory view of an elastic pressure mechanism of a pinch roller of the pile driving device.

FIG. 9 is a development view of the temperature-sensitive operating member.

FIG. 10 is a right side view in vertical section of the temperature-sensitive operating member.

FIG. 11 is a vertical sectional front view of the temperature-sensitive operating member.

FIG. 12 is a front view of a pile driving device, showing a conventional technique.

[Explanation of symbols]

1 ... Pile driver, 2 ... Roller pinching path, 3 ... Drive roller, 4
... pinch rollers, 5 ... pinching space, 6 ... 1 receiving port,
7 ... Delivery port of 1; 8 ... Roller drive source (oil motor); 10 ... Reinforcing pile (lock bolt); 12 ... Retaining part for rock mass, 14 ... Retaining part main body, 15 ... 14 outer surface, 16 ... Temperature sensitive Operating member, 17 ... Heater, A ... 10 advancing direction, B ...
A orthogonally outward, C ... A orthogonally inward, P ... 16 expanded position, Q ... 16 contracted position.

Claims (1)

(57) [Scope of utility model registration request] 1. A receiving port (6) of a pile driving machine (1) is exposed to a delivery port (7) via a roller pinching path (2), and the roller pinching path (2) is driven by a driving roller (3). ) And a pinch roller (4) are arranged so as to be opposed to each other with a sandwiching space (5) therebetween, and the driving roller (3) thereof is interlocked with the roller driving source (8) and the receiving port (6) ) The reinforcement pile (10) loaded from
In a pile driving device for a reinforcing pile for civil engineering, which is pinched by (2) and carried out from a delivery opening (7), a holding part (12) for rock mass is provided at the delivery opening (7) of the pile driving machine (1). The holding part (12) for rock mass is provided with a holding part main body (14) and a temperature-sensitive operating member.
(16) and heater (17)
4) is formed along the advancing direction (A) of the reinforcing pile (10),
The temperature-sensitive operating member (16) is arranged on the outer surface (15) of the holder body (14), and the temperature-sensitive operating member (16) is a heater.
The expansion position (P) that opens in the outward direction (B) orthogonal to the advancing direction (A) by heating (17) and the contraction position (Q) that closes in the orthogonal inward direction (C) by cooling the heater (17). ) And a position switching operation are possible, and a pile driving device for a reinforcing pile for civil engineering work, characterized in that