JPS6111349Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a drilling attachment that is detachably attached to, for example, a rotating arm of a self-propelled vehicle and is used to drill into rock or the like.

BACKGROUND OF THE INVENTION In civil engineering works such as tunnel digging and forest road construction, drilling and crushing of rock is carried out, but conventionally, such drilling work has been carried out by workers holding a rock drill in their hands. However, holding a rock drill in the hand is not only inefficient, but also poses various occupational health problems, so in recent years, for example, self-propelled vehicles have been equipped with attachments that allow the rock drill to be moved forward and backward. A drill (referred to as a crawler drill) is used, which is attached to the tip of a rotating arm. Conventionally, as a drilling attachment attached to such a crawler drill, a carriage to which a rock drill is attached is slidably arranged in a guide cell.
A chain is wound around sprockets placed at both the front and rear ends of the guide cell, and both ends of the chain are fixed to the carriage, and an air motor is attached to the chain chain to move the chain to a predetermined location on the guide cell. Eid type attachments are known, but because these conventional attachments provide propulsive force to the rock drill through a chain, they do not absorb the reaction force that the rock drill receives during drilling operations. acts directly on the chain, resulting in excessive tension on the chain, which may cause it to break. In order to prevent such a risk, a shock absorber is provided to keep the tension of the chain constant, but this method has disadvantages such as complicating the overall structure of the attachment. In addition, since the chain has a certain amount of flex, the chain vibrates significantly during drilling operations, and as a result, the chain itself generates noise, or when it comes into contact with a guide cell, etc., it generates noise. There were other inconveniences.

Conventionally, the screw feed type is known as a device that uses an air motor, but this type is a rock drill that is placed on the top of the guide cell so that it can slide forward and backward, or a rock drill that uses an air motor. A female screw is attached to a carriage with a screw attached to the guide cell, and a long male screw that is engaged with this screw is attached to the center of the guide cell in the longitudinal direction.The male screw is attached to the rear of the guide cell. It is configured to rotate in forward and reverse directions using an air motor with an attached mechanism to feed the rock drill later, making it possible to obtain a feed length that is approximately the full length of the male screw.

However, this screw feed system and the chain feed system mentioned above both use air motors, which require a large amount of compressed air, and the air motors also generate loud exhaust noise. There are drawbacks. In addition, the above-mentioned types tend to generate noise due to rotation, sliding, reaction, etc., and furthermore, parts are easily worn and damaged, making repair and maintenance such as parts replacement extremely troublesome.

In addition, an attachment is known in the past in which a carriage to which a rock drill is attached is attached to the tip of the piston rod of an air cylinder. The length had to be approximately twice as long, which resulted in the attachment itself becoming larger and requiring a larger working space.

The object of this invention is to provide a drilling attachment which can advantageously solve the above-mentioned problems.

Examples of this invention will be described below with reference to the drawings.

Figures 1 and 2 show an embodiment of this invention without the rock drilling machine, and the guide cell 1 has a narrow rectangular shape, with a longitudinal direction in the center of the upper surface. A slit 2 along the guide cell 1 is formed, and a carriage 3 for attaching a rock drill is slidably arranged on the upper surface of the guide cell 1, and a rodless air cylinder 4 is attached to the lower surface of the guide cell 1. ing. Now, to explain the structure of the rodless air cylinder 4, as shown in FIGS. 4 and 5, a slit 15 is formed in the tube 4a along its axial direction, and slits 15 are formed on both the inside and outside of the slit 15. Seal bands 17 and 18 wider than the slit 15 stretched between the end covers 16 are arranged, and these seal bands 17 and 18 tightly contact the inner and outer surfaces of the tube 4a to seal the slit 15. It's getting old. A piston 19 having a predetermined length is arranged inside the tube 4a so as to be movable back and forth.
A yoke 20 projecting from the slit 15 to the outside of the tube 4a is attached to the longitudinal center of the tube. That is, the yoke 20 is located between the seal bands 17 and 18, and is attached to the piston 19 by bolts 21 while straddling the inner seal band 17, as shown in FIG. The protruding portion of the yoke 20 from the tube 4a has a U-shaped cross section, inside which another seal band 18 is arranged, and a connecting fitting 4b is attached to the U-shaped cross section.
Therefore, when compressed air is supplied into the tube 4a, the yoke 20 moves together with the piston 19 while pushing the seal bands 17 and 18 apart, and after passing through the yoke 20, the seal bands 17,
18 is configured to closely contact the inner and outer surfaces of the tube 4a to close the slit 15 and prevent air leakage. As shown in FIG. 1, this rodless air cylinder 4 is attached to the guide cell 1 so that its connecting fitting 4b is located on the lower side. The carriage 3 is connected to the connecting fitting 4b by a bracket 5, and therefore the connecting fitting 4 is connected to the connecting fitting 4b.
b, that is, the movement range of the piston of the rodless air cylinder 4 is the movement range of the carriage 3, that is, the rock drill.

Further, a supporting arm 6 is provided at the top end of the guide cell 1 to support a rod (not shown) to be attached to the rock drill so as to be movable back and forth. A foot pad 7 is provided protruding from the hole to fix the guide cell 1 in the vicinity of the location where the hole is to be drilled. Further, a cell mounting bracket 8 is provided at a predetermined location below the guide cell 1, and a cylinder mounting bracket 9 is provided near the cell mounting bracket 8.

FIG. 3 shows the attached state of the drilling attachment configured as described above, in which a self-propelled vehicle 11 having an endless rubber crawler 10 is provided with a control valve 12, a hydraulic line (not shown), etc., and a hydraulic cylinder 13. , 13 . . . is provided with a rotating arm 14 that can be rotated vertically and horizontally and bent, and a drilling attachment is rotatably attached to the tip of the rotating arm 14 via the cell attachment bracket 8. Further, a hydraulic cylinder 15 is attached to the cylinder mounting bracket 9, and its rod is pivotally attached to a predetermined location of the swing arm 14, so that the drilling attachment is rotated by the hydraulic cylinder 15. Further, reference numeral 16 in FIG. 3 is a rock drill attached to the carriage 3, and a rod 17 attached to this is supported by the supporting arm 6. Although not shown, an air hose is connected to the rodless air cylinder 4 and the rock drill 16 from an external air source via the control valve 12, and the rock drill 16 is moved forward or backward by operating the valve. It is configured to start and stop the rock drill 16 at the same time.

In the case of the drilling attachment having the above configuration, the rodless air cylinder 4 provides the rock drill 16 with the propulsion force required for drilling, so the reaction force that repeatedly occurs during drilling work is transferred to the rodless air cylinder. 4, and as a result, since the working air is compressible, the impact force is alleviated by the working air, preventing excessive vibration from occurring, and at the same time causing unnecessary noise. There's nothing to do. In addition, since the rock drill 16 is configured to be moved back and forth by the rodless air cylinder 4, the movement range of the piston of the cylinder 4 corresponds to the movement stroke of the rock driller 16, and therefore the guide cell 1 is rodless. Air cylinder 4
In other words, it may be approximately the same length as the rock drill 16.
The length may be approximately the same as the movement stroke of , and the guide cell 1 can be made compact.

In addition, in the above embodiment, an example was explained in which the drilling attachment was attached to the swing arm 14 of the self-propelled vehicle 11 having the endless rubber crawler 10.
The drilling attachment of this invention may be used, for example, as a so-called boom jumbo by being attached to a swiveling arm provided on a trolley running on rails, or it may be used for drilling various types of equipment such as non-self-propelled vehicles or fixed fixed bases. It may be used by being detachably attached to equipment.

As explained above, the drilling attachment of this invention consumes very little air, does not generate excessive vibration or noise, has a short overall length, is lightweight, and has a simple structure. Furthermore, it is possible to obtain a drilling attachment that is easy to maintain and manage.

[Brief explanation of the drawing]

The figures show an embodiment of this invention. Figure 1 is a partially omitted side view with the rock drill removed, Figure 2 is a plan view, and Figure 3 shows it installed on the swing arm of a self-propelled vehicle. 4 is a sectional view showing the main parts of the rodless air cylinder, and FIG. 5 is a side view of the rodless air cylinder.
It is a line arrow view. 1... Guide cell, 3... Carriage, 4...
Rodless air cylinder, 14...swivel arm, 16...rock drill.

Claims (1)

[Scope of utility model registration request] A guide cell detachably attached to a drilling device, a rodless air cylinder disposed on the lower surface of the guide cell, and a connecting fitting for the rodless air cylinder slidably disposed on the upper surface of the guide cell. a carriage attached to the
A drilling attachment characterized by comprising a rock drill attached to this carriage.