JPH056008Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a method for holding a driving endless track traveling device in a pipe cutting machine that cuts pipes, etc. at construction sites such as waterworks and civil engineering works. be.

(b) Conventional technology A conventional pipe cutting machine (Patent No. 1091356) that uses a track running device for driving has a main body, a track running device, a chain with rollers, Chain tensioning devices are connected to form a series of rings for cutting. The track running device is constructed by fixing the prime mover to a drive shaft provided in a part of the main body, and connecting the driven shaft with the driven wheel slidingly engaged with the drive shaft, that is, the main body, with an endless belt such as a V-belt. There is no connection with other parts, and when the endless belt is removed, the driven shaft and the cutting machine body are completely separated.

(c) Problems that the invention aims to solve As a result, cutting machines can be used for underwater cutting work such as water pipe leakage work, removal work of submarine piles (if pipes are used), and vertical pipe cutting work such as utility poles. The installation work to set it on the pipe was inefficient. The purpose of the present invention is to improve work efficiency without sacrificing the features of track running equipment.

(d) Measures to solve the problem In order to improve work efficiency, auxiliary fittings are provided on the main body to prevent the track traveling device from falling off during installation work.

To explain this based on the drawings, the main body consists of a main body 1, an input shaft 2, a cutter shaft 3, an arm 4, a chain attachment shaft 5, etc. The endless track traveling device is built into the main body 1, and a prime mover 6 is fixed on both sides. The chain consists of a driven shaft 7, a driven shaft 9 with driven wheels 8 fitted on both sides, and an endless belt 10 connecting the chain.The end of the chain with rollers is attached to the center of the chain attachment shaft 5, and the end is free. Long screw 1 with hook 12 of chain tensioner screwed into the center of driven shaft 9
Hook any part of the chain with rollers 11 onto the hook 12 of No. 3 to form a series of rings. Tighten the chain with rollers 11 with the long screws 13 and firmly set it on the pipe, and cut with the cutter blade 14 while cutting the pipe. The drive holding fitting of the present invention is attached to a cutting machine whose entire body rotates along the outer circumference of the pipe.

The holding fitting A15 is a slide shaft with a square cross section, has a bearing portion at one end, and is rotatably attached to the drive shaft 7 via a bush 16. The holding fitting B17 is a pipe with a square cross section into which the holding fitting A15 is inserted and slid, and has a bearing part at one end and a bushing 16 on the driven shaft 9.
Rotatably attached via. Also holding metal fittings B1
6 has a built-in compression coil spring 18, and the drive shaft 7 and the driven shaft 9 are connected in parallel and telescopically by holding fittings A15 and B16. 19 is a washer, 2
0 is Natsu.

(e) Function The cutting machine equipped with the drive holding fitting of the present invention has the main body and the track traveling device integrated, so when the main body is set on the pipe, the track traveling device can be set at the same time, making the installation work extremely easy. become. In addition, the endless track traveling device, which is the greatest feature of this cutting machine, is such that when slack occurs in the chain 11 with rollers during cutting, the motor vehicle 6 takes the endless belt 10 by hand and presses it against the slack side of the endless belt 10 (pressing it to the pipe). The distance between the drive shaft 7 and the driven shaft 9 is automatically reduced, and the drive holding fitting of the present invention allows the holding fitting B16 to slide on the slide shaft of the holding fitting A14. Since it is always kept under tension by the compression coil spring 17, it can cope with subtle movements of the track traveling device, and the endless belt 10 is attached accurately, so that the cutting accuracy is improved.

(F) Embodiment In this embodiment, the cross section of the drive holding fitting is square, but other shapes may be used as long as the shaft and boss can slide. Further, it is sufficient if the holding fitting itself is made of a spring and is attached to the driving shaft and the driven shaft so that the two shafts can be held in a telescopic and tensioned state.

(g) Effects of the invention When the cutting machine equipped with the drive holding fitting of the invention is used, it has the advantage of being extremely easy to handle and can be expected to have higher cutting accuracy than ever before.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the entire pipe cutting machine, and FIG. 2 is a sectional view taken along line A-A, showing the state in which a pipe is being cut. In the diagram: 1...Main body, 2...Input shaft, 3...Cutter shaft, 4...Arm, 5...Chain attachment shaft, 6...Motive wheel, 7...Drive shaft, 8...Driver wheel, 9 ... Driven shaft, 10 ... Endless belt, 11 ...
...Chain with roller, 12...Hook, 13...
Long screw, 14...Cutter blade, 15...Holding bracket A, 16...Button, 17...Holding bracket B, 1
8...Compression coil spring, 19...Washer, 20...
It's Natsuto.

Claims (1)

[Scope of utility model registration request] In a cutting machine in which a series of main body parts, an endless track traveling device, and a chain with rollers are stretched in an annular shape along a pipe by a chain tensioning device, and the pipe is cut while rotating around the outer periphery of the pipe, a holding metal fitting A15 forming a slide shaft is used. The holding bracket B17, which has a built-in compression coil spring 18 and into which the slide shaft is inserted, is attached to the drive shaft 7 of the track traveling device.
A drive holding fitting for a pipe cutting machine which is rotatably attached to the driven shaft 9 and connects these two shafts in parallel and telescopically.