JPH061440U - Leader rotation lock device - Google Patents

Abstract

(57) [Abstract] [Purpose] The rotary leader is mounted with a rotary lock pin.
Although it is fixed to the gear side or the hammer side, there is a gap between the rotation lock pin and the insertion hole, so when a high torque auger is attached, the rotation lock pin and the pin hole are knocked down. -Da rattling occurs. The present invention provides a fixing device capable of eliminating such backlash. [Structure] Lock pin 23 on flange 22 of fixed leader
There are provided two holes for use, and the lock pin 23 to be inserted into these holes has a cylindrical insertion portion to the fixed reader, and the upper portion has a square shape so that it can freely rotate when inserted into the fixed reader. , Insert a wedge-shaped lock key 25 between the radial projection 24 of the flange of the rotary reader and the lock pin 23,
The plate 26 brought into contact with the outer surface of the convex portion 24 is fastened to the flange 22 of the fixed reader by the bolt 27, so that the rotary reader and the fixed reader are positioned and the play between them is reduced. Lost

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a rotary reader in which an auger device and a hammer device are installed at positions deviated by 90 ° from each other, and the auger work and the hammer work can be performed by rotating them. The present invention relates to a rotation lock device.

[0002]

[Prior art]

 The pile driving work for civil engineering foundation work has an auger machine and a hammer in order to solve problems such as noise and vibration, and after constructing a pile in a hole that was previously excavated by the auger machine, hammering was done. A pile driver equipped with a rotary leader is used to obtain the supporting force of the pile. As shown in FIG. 1, this pile driver supports a fixed leader 3 on a leader support bracket 2 arranged at the front part of a base machine 1, and the fixed leader 3 is rotatably erected. The rotary reader 4 installed is supported by a steer 5, and an auger 6 and a hammer 7 (FIG. 2) are attached to the rotary reader 4 and the rotary reader 4 is rotated. It is designed to perform auger work and hammer work.

As shown in FIG. 3, inside the fixed reader 3, there are provided cylinders 8 for rotating the reader, and when the piston rod 8a of one cylinder 8 is extended, the cylinder 8 of the other cylinder 8 is extended. The bevel gear 9 is rotated by shortening the piston rod 8a, the bevel gear 10 provided on the rotary reader 4 is rotated, and the rotary reader 4 is rotated with respect to the fixed reader 3. . In order to fix the rotary leader 4 to the respective working positions, the flange 11 of the fixed leader 3 is provided with locking holes for the hammer working position, the neutral position and the auger working position at intervals of 45 °. Then, the hole 13 formed in the flange 12 of the rotary reader 4 is inserted into one of the locking holes of the fixed reader 3, for example, the neutral position of the fixed reader 3 as shown in FIG. A rotary lock pin 16 which is fitted in the hole 14 and is pushed by a hydraulic cylinder 15 provided in the rotary leader 4 is inserted into and fixed to both the locking holes 13 and 14. In this case, since there is a gap between the rotary lock pin 16 and the pin hole, the rotary torque of the auger causes the rotary lock pin 16 and the pin hole to be knocked, resulting in rattling of the reader.

FIG. 5 and FIG. 6 show an example of the fixing device disclosed in Japanese Utility Model Publication No. 3-51366. In order to receive the torque of the auger, a pair of concave grooves 19 extending from the outer circumference to the inner circumference are provided near the auger working position fixing lock pin hole 18 of the flange 17 of the fixed reader. The convex portion 20a of the torque receiving piece 20 is fitted in the concave groove 19, and the flange 21 of the rotary leader is sandwiched from both sides to be fixed.

[0005]

[Problems to be solved by the device]

 As described above, the rotary leader is fixed to the auger side or the hammer side position by the rotation lock pin, but since there is a gap between the rotation lock pin and the insertion hole, the high torque auger is used. When a (lock auger) or the like is attached, the rotation lock pin and the pin hole are struck and rattling of the reader occurs. The present invention provides a fixing device capable of eliminating such backlash.

[0006]

[Means for Solving the Problems]

 Two holes for the lock pin 23 are provided on the flange 22 of the fixed leader, and the lock pin 23 to be inserted into these holes has a cylindrical insertion portion into the fixed leader and an upper portion with a square shape. The structure is such that it freely rotates when it is inserted into the feeder, and a wedge-shaped lock key 25 is inserted between the radial projection 24 of the flange of the rotary reader and the lock pin 23, and the outer surface of the projection 24 is abutted. By tightening the contacted plate 26 with the bolts 27 onto the flange 22 of the fixed leader, the rotary leader and the fixed leader were positioned to eliminate looseness between them.

[0007]

【Example】

 This will be described with reference to FIGS. In FIG. 7, two holes 18 for the lock pin 23 are provided on the flange 22 of the fixed leader. Further, the lock pin 23 has a cylindrical fixed leader insertion portion, and an upper portion thereof has a square shape, and when the lock pin 23 is inserted into the fixed leader, the lock pin 23 is structured to freely rotate. By inserting a wedge-shaped lock key 25 between the convex portion 24 of the flange of the rotary reader and the lock pin 23 and tightening the mounting bolt 27 of the plate 26, the rotary leader and the fixed leader are fixed. − I've eliminated the backlash. Even if the angle between the mating surface of the convex portion 24 of the flange of the rotary reader and the lock key 25 and the mating surface of the lock pin 23 and the lock key 25 is slightly deviated, this misalignment is also corrected because the lock pin 23 rotates. The structure is such that the mating surfaces naturally come into surface contact.

[0008]

[Operation]

 Since the high torque during the operation of the auger is transmitted from the flange of the rotary reader to the flange of the fixed reader via the lock key 25 and the lock pin 23, it can be fixed without play.

[0009]

【effect】

 Two holes for the lock pin 23 are provided on the flange 22 of the fixed leader, and the lock pin 23 to be inserted into these holes has a cylindrical insertion portion into the fixed leader and an upper portion with a square shape. The structure is such that it freely rotates when it is inserted into the feeder, and a wedge-shaped lock key 25 is inserted between the radial projection 24 of the flange of the rotary reader and the lock pin 23, and the outer surface of the projection 24 is abutted. The contacted plate 26 was fastened to the flange 22 of the fixed leader with a bolt 27. With such a configuration, 1) it is possible to completely eliminate play on the rotating side and the fixed side. Also, 2) When the plate mounting bolt 6 is tightened, the lock key 8 is naturally tightened, so that the mounting is extremely easy.

[Brief description of drawings]

FIG. 1 is a known pile driver.

2 is a cross-sectional view showing the arrangement of an auger and a hammer of the rotary leader in FIG.

FIG. 3 is a cross-sectional view of the reel rotating device.

FIG. 4 shows a rotation lock pin and its driving device.

FIG. 5 shows a rotary leader fixing device shown in Japanese Utility Model Publication No. 3-51366.

FIG. 6 is a cross-sectional view showing a mounted state of a torque receiving piece.

FIG. 7 is a plan view of a fixing device according to the present invention.

FIG. 8 is a view on arrow A of FIG.

[Explanation of symbols]

 1 Base Machine 2 Bracket 3 Fixed Leader 4 Rotational Leader 5 Steer 6 Ogger 7 Hammer 8 Cylinder 8a Piston Rod 9 Bevel Gear 10 Bevel Gear 11 Flange 12 Flange 13 Hole 14 Hole 15 Hydraulic Cylinder 16 Rotation Lock Pin 17 Flange 18 Lock pin hole 19 Recessed groove 20 Torque receiving piece 21 Flange 22 Flange 23 Lock pin 24 Radial convex portion 25 Lock key 26 Plate 27 Bolt

Claims (1)

[Scope of utility model registration request] 1. A lock pin on a flange (22) of a fixed leader.
Two holes for (23) are provided, and the lock pin (23) to be inserted into these holes has a cylindrical insertion part to the fixed leader, and the upper part has a square shape, and it can be freely inserted into the fixed leader. The rotary key has a structure that rotates, and a wedge-shaped lock key (25) is inserted between the radial projection (24) and the lock pin (23) of the rotary leader flange, and the outer surface of the projection (24) is The plate (26) abutting against the bolts (27) is fastened to the flange (22) of the fixed leader by positioning the rotary leader and the fixed leader, and the play between them is fixed. Leader rotation lock device characterized by eliminating.