US2360318A - Supporting device for rock drills - Google Patents

Description

1944- E. H. DICKENSON 2,360,318

SUPPORTING DEVICE FOR ROCK DRILLS Filed Afaril 2'7, 1944 Patented Oct. 17, 1944 SUPPORTING DEVICE FOR ROCK DRILLS Ernest H. Dickenson, New York, N. Y., assignor to Ingersoll -Rand Company, corporation of New Jersey New York, N. Y., a

Application April 27, 1944, Serial No. 532,983

4 Claims.

This invention relates to drilling mechanism, andmore particularly to a supporting device for fluid actuated rock drills of the drifter type.

One object of the invention is to assure a long life of the pressure fluid and cleansing liquid supply conduits for the rock drill.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference numerals refer to similar parts,

Figure 1 is a side elevation of a rock drill supporting device embodying the invention,

Figure 2 is a longitudinal view, partly broken away, ofthe drill supporting bar taken through Figure 1 on theline 22 looking in the direction indicated by the arrows,

Figure 3 is an end view of the drill supporting bar taken through Figure 2 ontheline 33,

Figure4 is a top plan View of the supporting device,

Figure 5 is an elevation, partly broken away, of a modified form of the invention, and

Figure 6 is a transverse view taken through Figure 5 on the line 6--6 looking in the direction indicated by the arrows.

Referring to the drawing, and at first more particularlyto the form of the invention shown in Figures 1 to 4 inclusive, designates a supporting device and 2| rock drilling mechanism arranged thereon for actuating adrill steel 22.

The rock drilling mechanism is shown as being of a conventional type. It includes adrifter 23 and aguide shell 24 whereon the drifter is slidably mounted, in a manner well known. The guide shell has theusual feed screw 25 for actuating thedrifter 23 along the guide shell, and amotor 26 arranged at the rearward end of theshell 24 may be connected operatively, in any suitable manner, with thefeed screw 25 for ro tating it.

The supportingdevice 20 is in the form of acolumn 21 having across bar 28 to support thedrifter 23 and theshell 24. Thecolumn 21 is of the extensible type having ascrew 29 threaded into its lower end and on the screw is a foot piece so havingpointers 31 for engagement with a supporting surface, as for example the floor of a tunnel. The upper end of thecolumn 21 is also provided with apointer 32 for engagement with an overlying rock surface.

Thecross bar 28 is secured to thecolumn 21 by aclamping device 33 that is adjustable endwise of thecolumn 21. The clamping device comprises ablock 34 having opposed surfaces shaped to conform with the surfaces of the column 2'! and thebar 28 between which it is arranged. Theblock 34 carriesbolts 35 that extend through end portions of aclamping plate 36 and carrynuts 31 for clamping theblock 34 and theplate 36 securely to the column. Theblock 34 further carriesbolts 38 that extend through aclamping plate 39 partly encircling'thebar 28, and on thebolts 38 arenuts 40 for clamping thebar 28 between the block' 34 and theplate 39.

Suitable and well known clamping mechanism,

designated in its entirety by 4|, is also arranged on thebar 28 to grip the bar and also acone 42 on theshell 24 for supporting the drilling mechanism in the correct position with respect to the work. The clamping mechanism 4| is shiftable along the length of thebar 28 and includes a pair ofbolts 43 for fastening theclamping members 44 and 45 to the bar.

Thebar 28, constructed in accordance with the practice of the invention, is in the form of a cylinder the interior of which serves as areservoir 46 for pressure fluid. The ends of the bar i thedrifter 23. Theconduit 53 is only of slightly greater length than the distance between the motor and the end of the bar, in the limiting positions of the bar, to prevent tautness of the conduit which will then at all times be suspended above the floor of the tunnel. Theconduit 54 is also of only a short length required to reach from theconduit 53 to the drifter in the limiting positions of the latter and will, therefore, at all times be held out of contact with the abrasive surface supporting the drill column.

As a preferred arrangement theconduit 53 is connected to an "oiling device 55 shown threadedly connected to thehead 48 and extending into thereservoir 46. Theoiling device 55, selected for the sake of illustration, may be of the type forming the subject matter of United States Patent 2,225,324 to Fred M. Slater and has theusual channel 56 for the passage of pressure fluid therethrough to theconduit 53, The oiling device may be provided with asuitable strainer 51 at the inlet end of thechannel 56 as an added safeguard against the passage of abrasive matter to the rock dr-ill.

In order to avoid the necessity of frequently dragging the cleansing fluid supply conduit for the drifter across the rough, abrasive surface supporting the drilling 'mechanism the cleansing fluid is also conveyed through thebar 28. To this end the bar is provided with apipe 58 that eX- tends through thehead 41 and thereservoir 46 and is seated at one end in apassage 59 in thehead 48. Thepipe 58 may be secured to the heads in any suitable manner, as by welding, and has anend 60 projecting from thehead 41 for connection with a conduit 6| leading from' a suit able source of liquid supply.

A fitting 62 is threaded into the outer end of thepassage 59 and is connected to aflexible conduit 63 leading to thedrifter 23. Theconduit 63 is only of suflicient length to follow the drifter to its various positions on theshell 24 and need i have only enough slack to avoid subjecting it to unnecessary strains. Theconduit 63 will, therefore, at all times remain suspended above the tunnel floor and will, in consequence, be protected against damage and unnecessary wear.

In the form of theinvention shown in Figures and 6 the bar intended to support theshell 24 and thedrifter 23, and designated 64, is shown as being provided at one end with aclamping element 65 for engagement with thecolumn 21, and asaddle 66 cooperates therewith for clamping thebar 64 to the column, the tWo being secured together bybolts 61. In this form of the invention thepipe 68 lies entirely within thebar 64 thehead 41 being provided with apassage 69 to receive an end of thepipe 68.

Thepassage 69 lies closely adjacent theclamping element 65, and in the periphery of thebar 64, closely adjacent theclamping element 65, is an aperture that opens into thepassage 69 and has threaded thereinto the end of a cleansing fluid supply conduit 6|. The opposite end of thepipe 68 extends into thehead 48 and communicates with theconduit 63 through thepassage 59. Pressure fluid is introduced into thereservoir 46 through thebushing 50 which is threaded into the side of the bar adjacent theclamping element 65 and is threadedly connected to the end of the pressurefluid supply conduit 52.

In practice, and as will be readily apparent from the foregoing description, the pressure fluid and cleansing liquid supply conduits connected to thedrifter 23 will, in all positions of the drilling mechanism on the column, be suspended above the tunnel floor and will, therefore, be protected against undue wear through contact with such floor. These conduits are, moreover, of short lengths and are for that reason less apt to become entangled with other portions of the drilling mechanism and require less handling and adjustment than in mechanism in which the supply conduits are extended directly from the sources of supply to the rock drill.

I claim:

1. In a supporting device for a fluid actuated rock drill, the combination of a column and a rock drill, a guide member for the rock drill, a reservoir for pressure fluid, means for securing the reservoir to the column, means for securing the guide member to the reservoir, a pressure fluid supply conduit for the reservoir, and a conduit for conveying pressure fluid from the reservoir to the rock drill.

2. In a supporting device for a fluid actuated rock drill, the combination of a column and a rock drill, a guide member for the rock drill, a reservoir for pressure fluid to support the guide member, means for securing the reservoir to the colurnn, a pressure fluid supply conduit connected to one end of the reservoir, and a conduit for pressure fluid leading from the other end of the reservoir to the rock drill.

3. In a supporting device for a fluid actuated rock drill, the combination of a column and a rock drill, a guide member for the rock drill, a reservoir for pressure fluid to support the guide member, means to secure the reservoir to the column, a pressure fluid supply conduit for the reservoir, a conduit for conveying pressure fluid from the reservoir to the rock drill, and means in the reservoir to introduce lubricant into the pressure fluid.

4. In a supporting device for a fluid actuated rock drill, the combination of a column and a rock drill, a guide member for the rock drill, a reservoir for pressure fluid to support the guide member, means to secure the reservoir to the column, a pressure fluid supply conduit connected to one end of the reservoir, a conduit for pressure leading from the other end of the reservoir to the rock drill, conduit means for conveying cleansing liquid through the reservoir, and a conduit for conveying cleansing fluid from the conduit means to the rock drill.

ERNEST H. DICKENSON.

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