JPS6126437Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a driving device for screw piles used as foundation piles for houses, etc.

[Prior art]

In recent years, noise and vibration generated during pile driving have become a problem, and it is considered undesirable to drive piles with a hammer or the like. For this reason, screw piles have been developed that have a spiral screw formed on the outer periphery and are driven into the ground.

[Purpose of invention]

The object of this invention is to provide a screw pile driving installation that allows screw piles such as those described above to be easily driven manually.

[Structure of the invention] The screw pile driving device according to this invention stores two ratchet wheels in a case so that the locking directions are opposite to each other, and one end is formed in the center of the ratchet wheels to have a polygonal cross section. A transmission shaft is inserted and fixed therein, and a pawl biased by an elastic member is protruded in a direction perpendicular to the axial direction of the transmission shaft on the outside of the case, and a pawl biased by an elastic member is protruded in a direction perpendicular to the axial direction of the transmission shaft. The above object is achieved by providing a lever protruding from the top.

〔Example〕

This invention will be explained in detail below based on illustrated embodiments.

In the figure, A is a screw pile driving device according to this invention, which is composed of a case 1, a ratchet wheel 2, a transmission shaft 3, a pawl 4, and a lever 5.

The case 1 has a cylindrical shape, and is covered with a cover plate 11 having a hole in the center on the upper surface, and is substantially entirely open on the lower surface.

Two ratchet wheels 2 are stored in this case 1, stacked one above the other. The ratchet wheels 2, 2 have claws 21, 21 formed on their outer peripheries so that their locking directions are opposite to each other.

A transmission shaft 3, one end of which has a polygonal cross section, is inserted and fixed at the center of the ratchet wheels 2,2. In the embodiment, one end of the transmission shaft 3 is formed to have a triangular cross section, and the cylindrical portion of the other end is inserted from below into the hole at the center of the ratchet wheels 2, 2, thereby connecting the ratchet wheels 2, 2 and the transmission shaft. A parallel key 31 is interposed between the two, and the two are fixed so as to rotate together. A male thread 32 is carved on the outer periphery of the upper end of the transmission shaft 3, and a nut 33 is screwed onto this male thread 32 to integrally connect the case 1, the ratchet wheels 2, 2, and the transmission shaft 3. .

A pawl 4, which is biased by an elastic member, protrudes in the direction of the outer periphery of the ratchet wheels 2, 2 in the case 1 so as to be movable forward and backward. The claws 4 are housed in two cylindrical sliding tubes 41, 41 provided on the outer periphery of the case 1 in a direction orthogonal to the axial direction of the transmission shaft 3. The sliding tubes 41, 41 are provided so as to correspond to the upper and lower ratchet wheels 2, 2 with their installation positions slightly shifted up and down. The pawls 4, 4 are rod-shaped members, and the ratchet wheels 2, 2
The side tips are the pawls 21, 2 of the ratchet wheels 2, 2.
It is formed into a tapered shape according to the inclination angle of 1. At the other end of the claws 4, 4 there is a disc-shaped knob 42, 4.
2 are formed, and in the middle there are disc-shaped pistons 43, 43 having the same diameter as the inner diameter of the sliding cylinders 41, 41.
is provided protruding toward the outer periphery. Sliding tubes 41, 41
Bushes 44, 44 are screwed to the opposite end of the ratchet wheels 2, 2.
The claws 4, 4 are slidably inserted into the center hole of the slider 44, and the knobs 42, 42 are positioned outside the sliding tubes 41, 41. Piston 4 with claws 4, 4
Coil springs 45, 45, which are elastic members, are interposed between 3, 43 and the bushes 44, 44 to bias the pawls 4, 4, so that they protrude movably in the outer circumferential direction of the ratchet wheels 2, 2.

A lever 5 is provided on the outside of the case 1 to protrude in a direction perpendicular to the axial direction of the transmission shaft 3. That is, on the outside of the case 1, levers 5, 5 are screwed into male threads 52, 52 of lever connecting rods 51, 51, each having a male thread 52 carved on the outer periphery of the tip in a direction perpendicular to the axial direction of the transmission shaft 3. ing.

Although this invention has the above-described configuration, a screw pile driving operation using the screw pile driving apparatus A according to this invention will be explained below.

The screw pile B to be driven has a spiral screw formed on the outer periphery, and the diameter of the tip gradually decreases. A fitting part 6 having the same shape and size as the polygonal cross-sectional lower part of the conduction shaft 3 is recessed in the upper end surface of the screw pile B, and the lower part of the conduction shaft 3 is fitted into the fitting part 6. do.

When the screw pile driving device A is rotated to screw the screw pile B into the ground, the pawl 4 is latched to the ratchet wheel 2 in the rotational direction of screwing. That is, one of the two pawls 4, 4 is locked to the pawl 21 of the ratchet wheel 2 so that the case 1, the ratchet wheel 2, and the transmission shaft 3 rotate together in the direction of rotation in which the two pawls 4 are screwed. The other claw 4 releases the engagement with the claw 21 of the ratchet wheel 2. To release the lock, for example, rotate the knob 42 of the claw 4,
The tapered surface of the tip of the pawl 4 on the ratchet wheel 2 side can be turned in the opposite direction to make it impossible to engage the pawl 4 and the ratchet wheel 2, or the knob 42 of the pawl 4 can be turned in the opposite direction.
It is conceivable to interpose a washer or the like having a U-shaped cross section between the bush 44 and the bush 44 so that the tip of the pawl 4 is moved back so as not to come into contact with the outer periphery of the ratchet wheel 2. If screw pile driving device A is rotated in this state, screw pile B
can be screwed into the ground by transmitting rotation through the transmission shaft 3. If the screw pile driving device A is rotated in the opposite direction, the pawl 4 will not be engaged with the ratchet wheel 2, so only the screw pile driving device A will rotate and the screw pile B will not rotate.

Pour water etc. into the excavated hole while screw pile B is being driven.
When the screw pile B is once pulled out in order to reduce the coefficient of friction between the screw pile B and the ground, the pawl 4 and the ratchet wheel 2 that were locked when screwed in were released, and the other one was released. The claw 4 and the ratchet wheel 2 are locked, and the screw pile driving device A is rotated in the opposite direction to the direction when screwing in, and the screw pile B is pulled out. Furthermore, when working on corners, etc., the lever 5 is connected to only one side of the screw pile driving device A.

[Effect of idea]

This invention has the above-mentioned configuration, and the screw pile is rotated and screwed in by the engagement of the ratchet wheel and the pawl, and only the screw pile driving device rotates in the opposite direction, resulting in unnecessary movement. You can work smoothly without any problems. Furthermore, since the two ratchet wheels are used so that the locking directions are opposite to each other, the screw pile can be smoothly rotated in opposite directions.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a screw pile driving operation using the screw pile driving device according to the invention, FIG. 2 is a cross-sectional view of the screw pile driving device, and FIG. 3 is a cross-sectional view taken along the line -. A...Screw pile driving device, B...Screw pile, 1...
Case, 2... Ratchet wheel, 3... Transmission shaft, 4... Pawl, 5... Lever, 6... Fitting portion.

Claims (1)

[Scope of utility model registration request] Two ratchet wheels are housed in a case so that their locking directions are opposite to each other, and a transmission shaft with one end formed with a polygonal cross section is inserted into the center of the ratchet wheels and fixed, and the ratchet wheels in the case are fixed. A screw pile driving device having a claw which is biased by an elastic member in the outer circumferential direction of the drive wheel and which protrudes so as to be able to move forward and backward, and a lever which is provided outside the case to protrude in a direction orthogonal to the axial direction of the transmission shaft.