Патент USA US2114132код для вставки
April'lZ, 1938. E. MERRILL 2,114,132 HOLE SPOTTER Filed April 7, 1957 6 J B 2 Sheets-Sheet 1 7 Everett Merrill ' INVENTOR BY ATTORNEY ' April 12, 1938. E. MERRXLL ' 2,114,132 HOLE SPOTTER Filed April '7, 1-937 ' 2 Sheets-Sheet 2 Everett Merrill IN ENTOR 'BY ATTORNEY Patented Apr. 12, 1938 2,114,132 UNITED STATES PATENT OFFICE 2,114,132 HOLE SPOTTER Everett Merrill, North Arlington, N. J., assignor to Worthington Pump and Machinery Corpo ration, New York, N. Y., a corporation of Dela ware Application April 7, 1937, Serial No. 135,374 5 Claims. This invention relates to rock drilling equip ment and more'particularly to a hole spotter or centering device for holding and guiding drill steels during the starting of a drill hole. 5 ure 4. Figure 7 is a horizontal section through the hole spotter taken on the line 1-4 and showing a part In drilling rock with rock drills of the hammer of the drilling machine frame in top plan. piston percussive type, it has been the general ' practice in starting drill holes for the drill run ner’s helper or helpers to hold the drill steel man the improved hole spotter forming the present invention is particularly adapted for attachment ually to steady it and get the drill hole started. 1 O This is not only expensive in that it requires the Referring more particularly to the drawings, to various types of rock drilling machines em bodying feeding means and guiding frames for ‘10 services of one or more helpers, but due to the the movement of the rock drill proper, such as vibration of the drill steel and the force of its vibration and movement taken together with the irregularity of the rock surface in which the drill the machines shown in Patents Numbers 914,737 to Leyner, 709,022 to Leyner, and 1,690,359 to Gil man. The patents just quoted show rock drilling machines of certain types to which the hole spot- ‘16 hole is started is hazardous, often resulting in seri ous injury to the helper. The present invention comprehends the provi sion of a hole spotter which is readily attachable to or detachable from a drilling machine, and which will hold a drill steel steady and true during the starting or spotting of a drill hole, thereby not only resulting in a savings due to ‘the dis pensing of the helper in such work, but removes the hazards to the helper. An object of the present invention is to provide a hole spotter as speci?ed which is simple in con struction, may be used in connection with ap proved types of drilling machines now on the 30 market, one which is inexpensive to manufacture, and one which may be easily and quickly moved out of drill steel guiding position after the drill hole has been started. With these and other objects in View, as may appear from the accompanying speci?cation. the invention consists of various features of construc tion and combination of parts, which will be ?rst described in connection with the accompanying drawings, showing a hole spotter of the preferred 40 form embodying the invention, and the features forming the invention will be speci?cally pointed out in the claims. In the drawings: Figure 1 is a side elevation of the improved hole 45 spotter showing it attached to a fragment of a drilling machine. Figure 2 is a vertical section through the hole spotter and a part of the drilling machine and taken on the line 2-2 of Figure 4. Figure 3 is a detail section through the hole spotter and a part of the drilling machine frame taken on the line 3—3 of Figure 2. Figure 4 is an end elevation of the hole spotter. 55 (Cl. 255—45) showing the end opposite to that shown in Fig Figure 5 is a top plan of the hole spotter. Figure 6 is an end view of the hole spotter ter is particularly adaptable, but it is to be under stood that it may be used in connection with any approved type of drilling machine to which it is applicable without departing from the spirit of the present invention. The improved hole spotter comprises a stand ard I which has a pair of oppositely disposed drill steel guiding members 2 and 3 formed integrally therewith. The drill steel guiding members are spaced laterally so as to engage upon opposite 52-5 sides of a drill steel, indicated at A, and they are spaced longitudinally from each other a distance greater than the diameter of the drill steel A so that when it is desired to remove the hole spotter from drill steel guiding position it may be rotated r31) a quarter turn and moved downwardly off or from about the drill steel. The inner sides 4 of the drill steel guiding members 2 and 3 are prefer ably curved as clearly shown in Figures 4 and 6 of the drawings to conform to the curvature of the 535 drill steel and to provide a ?rm holding guide for the drill'steel during the spotting or starting of a drill hole. The hole spotter is readily attachable to or detachable from a drilling machine of any ap_ 40 proved type, only a fragment of which is shown in certain of ‘the drawings, and the lower end of the standard ,I is provided with an opening 5 ex tending therethrough which ?ts over a lug or pin 6 formed upon and extending forwardly from the ‘45 forward end of the section 1 of the frame B of the rock drilling machine. The section 7 of the frame B of the rock drilling machine as shown in the drawings forms the support for the forward end of the feed screw 8 by means of which the 50 rock drill proper indicated at C is manually fed to its work. The drawings show a rock drilling machine in which the rock drill C is fed manually to its work by means of the feed screw 8 as for instance the type of drilling machine shown in 55 2,114,132 2 the two Leyner patents above referred to but it is to be understood that the hole spotter may be the combination with a rock drilling machine used with drilling machines embodying pneumatic feeds such as that shown in the Gilman patent above cited or any other approved types of drill ing machines without departing from the spirit including a frame, of a lug on the forward end of said frame, a standard, drill steel guiding members on said standard, said standard pro vided with an opening for receiving said lug, said frame provided with spaced recesses therein and of the present invention. The standard I has its lower end flattened, and it has laterally projecting extensions or lugs 9 and 10 formed thereon and which engage in re cesses l l and I2 respectively cut in the member ‘I of the frame B below and on opposite sides of the lug or pin 6. These extensions 9 and I0‘ engaging in the recesses I l and I2 prevent pivotal 15 movement or wobbling of the hole spotter during lugs on said standard for engagement in said recesses to prevent pivotal movement of the standard relative to the frame. 2. In a hole spotter for rock drill machines, the 10 the spotting or starting of a drill hole. The standard i has a lug Ill formed thereon to which a handle I5 is connected. The handle [5 is provided to facilitate the connection of and 20 disconnection from a drilling machine of the hole spotter and also to permit an operator to grip it and hold the hole spotter steady during -.30 the starting of a drill hole. When it is desired to mount the hole spotter on a drilling machine, the hole spotter is posi tioned forwardly of the bracket 1 and is moved so that the drill steel guiding members 2 and 3 are positioned at a substantially quarter turn from the position shown in Figure 5 of the draw ings after which the hole spotter is rotated a quarter turn to move the members 2 and 3 into the drill steel guiding position as shown in Fig ures 1, 4, 5, and 6 of the drawings and the hole spotter is then moved rearwardly towards the 35 rock drill C and upon the lug 6 with the exten sions 9 and I0 engaging in the recesses I l and I2 at which time the hole spotter is in position for use. After the drill hole has been drilled to a suffi cient distance to remove the need of the hole spotter, it is moved forwardly off the pin 6, ro tated a quarter turn to permit the members 2 and 3 to clear the drill steel, and then moved downwardly and away so as not to interfere with 45 the continued drilling operation of the drilling machine. The vibration of the drilling machine during operation may cause the hole spotter or drill steel guide to move off the lug 6, and to prevent such 50 action a locking spring or member 20 is pro vided which is attached to the standard I in any suitable manner as at 2| and extends outwardly from the standard. The outer free end of the ?at locking spring 20 is bent downwardly as shown at 22 for engagement over and against 55 the end of the boss 8’ which supports the end of the feed screw 8. A releasing thumb piece 23 is provided on the locking spring for releasing it from locking engagement with the boss 8' when 60 it is desired to remove the hole spotter from attachment to the drilling machine. t will be understood that the invention is not to be limited to the speci?c construction or ar rangement of parts shown but that they may be 65 widely modi?ed’ within the invention de?ned by the claims. What is claimed is: 1. In a hole spotter for rock drilling machines, combination with a drilling machine including a frame having recesses in its forward end, a lug on the forward end of the frame between said recesses, a standard, drill steel guiding members on said standard, said standard provided with 15 an opening for receiving said lug, means on said standard for engagement in said recesses to pre vent pivotal movement of the standard relative to the frame, and means for locking said stand ard against accidental movement relative to said 20 frame. 3. In a hole spotter for a rock drilling machine, the combination with a drilling machine includ ing a frame having recesses in its forward end, a lug on the forward end of the frame between 25 said recesses, a standard, drill steel guiding mem bers on said standard, said standard provided with an opening for receiving said lug, exten sions formed on said standard for engagement in said recesses to prevent pivotal movement of said 30 standard relative to the frame, said drill steel guiding members being formed integrally with said standard and spaced laterally for engage ment on opposite sides of a drill steel and spaced longitudinally from each other a distance in ex» .35 cess of the diameter of a drill steel to permit them to be moved clear of a drill. 4. In a hole spotter for rock drilling machines, the combination with a rock drilling machine in cluding a frame, of a lug on the forward end of said frame, a standard, drill steel guiding mem— bers on said standard, said standard provided with an opening for receiving said lug, means on said standard for engagement with said frame to pre vent pivotal movement of the standard relative 45 to the frame, and a spring latch carried by said ' standard for engagement with said frame.’ 5. In a hole spotter for a rock drilling machine, the combination with a drilling machine includ ing a frame having spaced recesses in its forward 50 end, a lug on the forward end of the frame be tween said recesses, a standard, drill steel guid ing members on said standard, said standard pro vided with an opening for receiving said lug, extensions formed on said standard for engage 55 ment in said recesses to prevent pivotal move ment of said standard relative to the frame, said drill steel guiding members being formed inte grally with said standard and spaced laterally for engagement on opposite sides of a drill steel 60 and space-d longitudinally from each other a dis tance in excess of the diameter of a drill steel to permit them to be moved clear of a drill, and a spring latch carried by said standard for en 65 gagement with said frame. EVERETT MERRILL.