JP3494865B2 - Connection device for circular shaft excavator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating tubing device and a crawler for reciprocating a circular tube for excavating a circular shaft for civil engineering work and for press-fitting the same. The present invention relates to a connecting device for a circular shaft excavator to which a base machine is connected. 2. Description of the Related Art Conventional swing tubing devices of a circular shaft excavator and a base machine with a crawler can be divided into the following three types. In the first example, a tubing device and a base machine are connected only by horizontal pins, and FIG. 5 shows an example thereof. The tube D is pressed into the ground by the swinging tubing device A. The base machine B with a crawler supplies power to the tubing device and also controls it. Since the two are connected by the horizontal pin C, they can be bent in the vertical direction. No. 2 is a tubing device and a base machine connected by horizontal pins and vertical pins.
Therefore, bending in the vertical direction and twisting in the tilting direction are possible. As shown in FIG. 6, in addition to a horizontal pin and a vertical pin, a vertical movement guide F and a vertical movement cylinder G are added to the third so that the coupling device can be vertically moved in parallel. In this connection method, the tubing device B and the base machine A can be perfectly matched. In a method of connecting a tubing device and a base machine with a crawler only by horizontal pins, the base machine does not have an outrigger function, so that if the connecting device is twisted, there is a possibility that the connection device may be damaged. Further, when a level difference occurs in the vertical direction, it is necessary to perform adjustment by relying on the outrigger of the tubing device. The use of a horizontal pin and a vertical pin for connection solves the above-mentioned problem of twisting. However, the same problem as above remains for the upper and lower steps. If a vertical adjustment mechanism is attached to the connection in addition to the vertical pin and the horizontal pin, ideal connection is possible without relying on the outrigger of the tubing device. [0004] When the tubing device is of the swing type, the tube tightening band is a floating type in which the tube is suspended by a press-in / draw-out cylinder, so that even if the tubing machine has a slight inclination, the tube can be pressed into the ground vertically, A coupling device having only a horizontal pin and a vertical pin with a simple mechanism is often used. In this case, the bending stress is repeatedly applied to the vertical pin by the reaction force of the oscillating torque of the tube and the load applied from the tubing device, and the vertical pin is often damaged. [0005] In order to solve the above problems, the present invention provides:
A tubing device and a crawler
A connection device for connecting the base machine to the base machine;
Bing device and the base machine on the opposing surfaces of the base machine.
The base machine is mounted on the wall plate on the side of the tubing device.
One vertical pin projecting in the same direction as the traveling direction;
A swing provided on the wall plate so as to be rotatable about the vertical pin.
A moving plate, and a rocking plate sandwiching both ends of the rocking plate between the wall plate and the moving plate;
Moving plate end support means, and the vertical pin of the rocking plate
It is provided at both sides of the base machine,
Two eyes projecting in the same direction and the tubing
The base machine on an opposing surface of the device and the base machine
Two protruding on the thin side and connected to the two eyes
Clevis, the axial direction is perpendicular to the axial direction of the vertical pin and
Two horizontal pins that pin connect the eye and the clevis
And a horizontal pin. Departure
In Ming, in order to prevent breakage due to bending stress of the vertical pin in the connecting device of the rocking type tubing machine and crawler type base machine, the vertical pin has only the role of supporting the center of rotation and the shear stress, Try to minimize bending stress. For this purpose, a rocking plate that rotates around a vertical pin is used as rocking plate end support means, for example, a wall plate.
An arcuate guide that receives the end of a partially disk-shaped rocking plate,
Is a holding plate or wall plate sandwiching the wall plate and the vicinity of the end of the swing plate.
With a head driven into an arc-shaped slit provided on the rocking plate
Pinhead, sandwiched by, so that the bending moment from the swing plate unexpected transmitted vertically pin. FIG. 1 is a layout view of a connecting device of a swing type tubing device and a base machine with a crawler. The rocking type tubing device 1 has a structure in which a tightening band 22 grips a circular shaft excavation tube 23, the rocking cylinder 21 gives a small reciprocating circular motion to this, and the press-fitting / pulling-out cylinder 20 is pressed into the ground. Has become. Hydraulic oil is supplied to this from the base machine 2 with a crawler, and is operated from the driver's seat. A connecting device connects the horizontal pin 5 and the vertical pin 6 to each other. FIG. 2 shows an example of a connecting device using an arc guide. The vertical pins 6 pass through the wall plate 3 and the swing plate 4 of the tubing device 1. The wall plate 3 is a part of the tubing device 1, and the swing plate 4 is connected to the frame of the base machine 2 by clevis 7, eye 8 and horizontal pin 5. Rocking plate 4
Has a partial disk shape, and its outer periphery is surrounded by an arc-shaped guide 9. The guide 9 is bent at its tip to form an arc-shaped groove, and the end of the swing plate 4 is fitted. For this reason, of the forces generated between the tubing device 1 and the base machine 2, most of the elements that apply a bending stress to the vertical pin 6 are absorbed by the guide 9, and the vertical pin 6 is mainly subjected to shearing force. As a result, the trouble of the vertical pin 6 which has often caused a cutting accident in the related art is eliminated. FIG. 3 shows a method in which a swinging plate 4 is sandwiched between wall plates 3 using a holding plate 10 bridged like a bridge instead of a guide. In this case, the oscillating plate 4 does not need to take the shape of a partial disk, but may be square. FIG. 4 shows an arc slit 12 and a pin 11 with a head.
It is a method by. The head of the headed pin 11 narrows the rocking plate 4. Since the present invention is configured as described above, the following effects can be obtained. When connecting a swinging tubing device to a base machine with a crawler, the connecting device having a vertical adjusting mechanism does not need to adjust fine vertical steps, but can be adjusted roughly by a connecting device using only horizontal pins and vertical pins. If done, safe and accurate work is possible. Therefore, there is no need for a vertically adjusting mechanism having a complicated structure. [0012] The occurrence of breakage of the vertical pin of the connecting device is reduced. [0013] The size of the vertical pin of the connecting device can be reduced,
Vertical pin wear is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an arrangement view of an oscillating tubing device and a base machine with a crawler with some cutouts. FIGS. 2A and 2B are a front view and a top view of a coupling device having an arc-shaped guide. FIGS. 3A and 3B are a front view and a top view of a connecting device having a bridge-shaped holding plate. FIGS. FIG. 4 is a front view and a top view of a coupling device using a headed pin and an arc slit. FIG. 5 is a side view of an oscillating tubing machine having a coupling device with a horizontal pin and a base machine with a crawler. FIG. 6 is a top view of a tubing machine having a coupling device provided with a horizontal pin, a vertical pin, and a vertical adjustment mechanism, and a base machine with a crawler. [Description of Signs] 1 Tubing device 2 Base machine 3 Wall plate 4 Oscillating plate 5 Horizontal pin 6 Vertical pin 7 Clevis 8 Eye 9 Guide 10 Holding plate 11 Headed pin 12 Arc slit 20 Press-in / draw-out cylinder 21 Oscillating cylinder 22 Tightening Band 23 with tube

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E21B 7/20 E21B 3/025 E21B 3/02-3/06 E02D 7/00-13/10

Claims (1)

(57) A connecting device for connecting the tubing system and the crawler with base machine for excavating the Patent Claims 1. A circular pit, wherein the opposing surfaces of the tubing system and the base machine One vertical pin protruding in the same direction as the traveling direction of the base machine on a wall plate which is a surface on the tubing device side , and a rocking plate provided on the wall plate so as to be rotatable around the vertical pin. And the both ends of the rocking plate with the wall plate
A swing plate end support means sandwiched between, put the swing plate
Provided on both sides of the position of the vertical pin that, the Besumashi
Two eyes protruding in the same direction as the traveling direction of the tubing device, and protruding from the opposing surfaces of the tubing device and the base machine on the base machine side and in contact with the two eyes.
The two clevises connected to each other and the axial direction is the axial direction of the vertical pin
Pin the eye and the clevis at right angles to the
A coupling device for a circular shaft excavator, comprising two horizontal pins to be connected.