JPH0448885Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a drilling machine, and more specifically, the invention relates to a drilling machine that holds a cutting piece when drilling a plate-shaped material, The present invention relates to a drilling machine equipped with a cutting piece holding device that smoothly discharges cutting pieces after machining.

(Prior art) Conventionally, when drilling a material such as a plate, the thickness of the plate is so thin that a normal drill, which is a drilling tool, cannot be used because the tip of the drill sticks out before the drill bits in completely. A single-character drill (also called a flat drill), which is a steel plate drill with a special sharpening point, is mainly used for drilling holes in steel sheets. In addition, the Ichimonji drill can be used for both thin and thick materials, so it can be used for steel frames,
It is often used in the bridge industry.

(Problems to be solved by the invention) As is well known, when drilling into a material with a drill, especially when drilling with a single-character drill used as a drill for steel plates,
As shown in C, just before the drill D penetrates the material W, the thickness of the bottom part of the hole in the material W becomes extremely thin, and this thin part creates an umbrella-shaped cutting piece on the bottom surface of the material. It will be distinguished as S.
If this umbrella-shaped cutting piece S is completely cut off from the bottom of the hole, there will be no problem.

However, as described above, after the bottom of the hole in the material W becomes thin and the umbrella-shaped cutting piece S protrudes downward as shown in FIG. 8A, as shown in FIGS. 8B and 8C. Then, a portion of the cutting piece S is cut off from the material W, and then the umbrella-shaped cutting piece S is pushed downward by the thrust of the drill D, and then further cut by the drill D. It is generally attached to the lower surface of the material W without being cut.

As mentioned above, there are umbrella-shaped cutting pieces S on the bottom surface of the material W.
If the cutting pieces S remain attached, it is necessary to remove the cutting pieces S in a subsequent process, which poses a problem in improving work efficiency.

[Structure of the invention] (Means for solving the problem) The present invention was made in view of the above-mentioned problems. A processing head equipped with a drill is a drilling machine provided above the work table, and a cutting piece receiver supporting the lower surface of the material facing the drill is movable up and down and biased upward. In addition, it is configured to hold the umbrella-shaped cutting pieces produced on the lower surface of the material during drilling with the drill, and to descend as the drill descends.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIGS. 1, 2, and 3, a work table 5 is provided on a base 3 of the drilling machine 1. As shown in FIG. On the upper part of the work table 5, a plurality of rollers 7 extending in a direction perpendicular to the plane of the paper in FIG.
It is rotatably supported at an appropriate interval in the left-right direction in FIG. 1 via a support member 5A forming a part of the support member 5A.

A plate-shaped material is placed on the roller 7 and can be moved to the right as shown by the arrow in FIG. 1 in the material feeding direction.

A work clamp device 9 is provided on one side of the table 5, for example, on the right side in FIG. 2, so as to be movable in the material feeding direction, that is, in a direction perpendicular to the plane of the paper in FIG. The work clamp device 9 is composed of a carriage 11 and a plurality of work clamps 13, and the carriage 11 is movable in the material feeding direction. On the other side of the table 5, for example the left side in FIG. 2, a processing section is provided with a vertically movable material presser 15 that presses the material from above.

A plurality of work clamps 13 clamp the side edges of the material, and the material is moved in the transport direction by the carriage 11. This work clamp device 9 is capable of re-clamping with a plurality of work clamps 13 and moving the position of the material to be processed to the processing device. The material holding device 15 presses the material from above during the drilling process, and also holds the material when the work clamp 13 re-holds the material. When feeding the material with the work clamp device 9, the material is released from being held down.

The base 3 has, for example, a gate-shaped column 1.
7 is installed upright, and the front first part of the column 17
A processing head 19 is provided on the right side in the figure. At the bottom of the processing head 19, steel plate drills 21, such as a plurality of single-character drills, are installed in a straight line in the left-right direction as shown in FIG. It is movable up and down and rotatable in the vertical direction by a drive device such as a motor.

With the above configuration, the material is transferred to the workpiece clamping device 9.
The material is clamped by the workpiece clamp 13 and moved in the material feeding direction by the carriage 11 to position the material to be processed at a processing position, that is, a position below the shaft center of the drill 21, and the material holding device 15
Press down on the material. In this state, the drill 21 attached to the lower part of the machining head 17 is rotated and lowered to drill holes in the material.

Note that if the material cannot be positioned at the processing position by just one clamping by the workpiece clamp device 9, the material can be re-held several times by the workpiece clamp 13.

A cutting piece holding device 23 for holding cutting pieces of the material during drilling is provided between the rollers 7 on the upper part of the table 5 below the processing position where the drill 21 perforates the material. There is.

A more detailed concrete configuration of the cutting piece holding device 23 is shown in FIGS. 4, 5, and 6.

In FIGS. 4 and 5, the left end, which is one end of the material holding plate 25 of the cutting piece holding device 23, is fixed to a support member 27 integrated with the table 5 by, for example, welding, with a plurality of bolts.

The other end, the right end, of the material support plate 25 is supported by a piston rod 31 of a cylinder 29, and the lower end of the cylinder 29 is supported by the table 5.

The rollers 7 for placing and moving the material and the material holding plate 25 are approximately at the same height, as shown in FIG.

The material holding plate 25 is a first material holding plate 25, as shown in FIGS. 5 and 6.
A and a second material holding plate 25B, the first material holding plate 25A and the second material holding plate 25B are arranged apart from each other and are integrated at the lower end.

A hinge shaft 33 is attached and fixed to the left side of the first material holding plate 25A and the second material holding plate 25B in FIGS. 4 and 5, and the first material holding plate 25A is attached with the hinge shaft 33 as a fulcrum. , second material holding plate 2
5B is rotatable.

On the other hand, in FIG. 4, the lower right side of the material holding plate 25 is supported by the upper part of the piston rod 31, and the lower end of the cylinder 29 is supported by the table 5. A spring 35 is interposed therebetween. The spring 35 is adapted to bias downward.

By supplying pressure oil to the oil passage 37 communicating with the piston chamber, the material holding plate 25 rotates and rises using the hinge shaft 33 as a fulcrum as shown in FIG. 4, and the upper surface of the material holding plate 25 touches the roller. It is adjusted to approximately the height position of 7.

When the pressure oil is removed from the piston chamber, due to the action of the weight of the material holding plate 25 and the biasing force of the spring 35, the material holding plate 25 moves downward away from the processing position as shown by the two-dot chain line in FIG. be done.

A cutting piece receiver 39 is provided approximately midway between the first holding plate 25A and the second holding plate 25B, and one end of an L-shaped hinge plate 41 is provided at the lower part of both end sides of the cutting piece receiver 39. is attached, and bolts 43, 43 are attached to the other end of the hinge plate 41. A spring 45 biased upward in the machining position side of FIG. 6 is interposed between the cutting piece receiver 39 and one end of the hinge plate 41.

As shown in FIG. 6, a groove 47 is bored approximately in the center of the second material holding plate 25B, and the hinge plate 41 is inserted into the groove 47 so that it can swing. There is. Further, a hinge plate receiver 49 is integrated with the lower left side of the second material holding plate 25B by welding or the like at the lower left side in FIG. It is in contact with the lower left side. The cutting piece receiver 39 is connected via the hinge plate 41 to the bolts 43, 43 as hinge fulcrums, as shown in FIG.
It will be swung as shown by the dotted chain line.

Next, to explain the operation of the cutting piece holding device 23 when drilling a hole in a material with the drilling tool 21, before carrying the material into the processing position, pressure oil is removed from the piston chamber of the cylinder 29, and the material holding plate 25 The first and second material holding plates 25A and 25B are lowered at one end by their own weight and the action of the spring 35. As a result, the first and second material holding plates 25
The upper surfaces of A and 25B are lower than the upper surface of the roller 7.

Next, the material is carried in and positioned at a predetermined position by the workpiece clamping device 9. When the cylinder 29 is actuated to supply pressure oil to the piston chamber, the piston rod 31 rises and the first and second material holding plates 25
A, 25B rises. As a result, the material is first,
Second material holding plates 25A, 25B and roller 7
held by.

When the drill 21 performs a predetermined drilling process on the material W, the cut pieces S are held in the cut piece receiver 39 and separated, as shown in FIGS. 7A, B, and C. First and second material holding plates 25A, 25B
When lowered, the cutting piece receiver 39 swings via the hinge plate 41 using the bolt 43 as a hinge fulcrum, and the cutting piece S falls from the cutting piece receiver 39 and is discharged. When the cutting piece S is discharged, the material W is moved on the roller 7 in the material feeding direction by the work clamp device 9.

Therefore, the cutting pieces S generated during the drilling process are reliably held by the cutting piece receiver 39, so that the cutting pieces S do not adhere to the lower surface of the material W, thereby eliminating the conventional drawbacks. Thus, the power for feeding the material W can be reduced without increasing it.

Note that the present invention is not limited to the embodiments described above, but can be implemented in other forms by making appropriate changes. For example, the means for swinging the material holding device is not limited to a cylinder.
It is possible to use other drive sources such as motors. Alternatively, the material holding plate may be raised and lowered by providing an elevating means approximately at the center of the material holding plate without swinging the material holding plate.

[Effects of the invention] As can be understood from the description of the embodiments above, the present invention is equipped with a steel plate drill 21 for drilling into a plate-shaped material W placed on a work table 5. The machining head 19 is a drilling machine provided above the work table 5, and the cutting piece receiver 39, which supports the lower surface of the material W facing the drill 21, is movable up and down and attached in an upward direction. The drill 21
The cut piece S produced on the lower surface of the material W during the drilling process is held and descends as the drill 21 descends.

As is clear from the above configuration, in the present invention, a cutting piece receiver 39 that supports the lower surface of the material W is provided opposite to the steel plate drill 21, and this cutting piece receiver 39 is movable up and down and can be moved up and down. It is configured to hold the umbrella-shaped cutting pieces S generated on the lower surface of the material W during drilling with the drill 21.

Therefore, according to the present invention, when a hole is drilled into the material W using the drill 21, and the bottom of the hole becomes thin and the cutting piece S protrudes like an umbrella to the lower surface of the material W, the hole shown in FIG. 7A is formed. As shown, this protrusion is supported from below by a cutting piece receiver 39. Although a portion of the umbrella-shaped protrusion tends to be separated from the material W and pressed downward by the drill 21, the umbrella-shaped cutting piece S
is supported from below by the cutting piece receiver 39, so the umbrella-shaped cutting piece S is maintained in a substantially horizontal state without being pushed downward and bent, as shown in FIG. 7B. The drill 21 presses it downward while keeping it in place.

In other words, the umbrella-shaped cutting piece S is placed in the cutting piece receiver 39.
Since the cut piece S is cut by the drill 21 in a substantially horizontal state with its lower side supported by the material W, the umbrella-shaped cut piece S is cut from the material W.
This ensures that the material is separated from the material W, and does not become attached to the lower surface of the material W. Then, as shown in FIG. 7C, the cut piece S is removed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a drilling machine showing an embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a plan view of FIG. 1. 4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is a plan view of FIG. 4, and FIG. 6 is a sectional view taken along the - line in FIG. 4. FIG. 7 is an explanatory diagram of the operation of supporting and removing cut pieces according to this embodiment. FIG. 8 is an explanatory diagram showing the state in which cut pieces are generated. Explanation of the symbols representing the main parts of the drawing, 1...
Drilling machine, 5...table, 21...drill,
39... Cutting piece receiver, 41... Hinge plate.

Claims (1)

[Scope of utility model registration request] A plate-shaped material W placed on the work table 5
A processing head 19 equipped with a steel plate drill 21 for drilling holes in the steel plate is used as a drilling machine provided above the work table 5.
1, a cutting piece receiver 39 supporting the lower surface of the material W is provided so as to be movable up and down and biased upward. A drilling machine characterized by being configured to hold the piece S and descend as the drill 21 descends.