JPH08132432A - Boring working-machine for lithic material - Google Patents

Abstract

PURPOSE: To efficiently bore a round hole in a lithic material by providing a main shaft so as to arbitrarily and freely raise and lower the same by a manual handle and a lift cylinder. CONSTITUTION: A core drill is allowed to fall by a manual handle 4 until brought into contact with a lithic material and further sent little by little until it bites in the lithic material. Next, the dog of a cutting-in depth gauge is adjusted so as to be matched with hole depth and the selector switch of a compressed air passage is changed over to falling to allow a lift cylinder 5 to fall and, thereafter, a main shaft and an outer cylinder are allowed to fall by the lift cylinder 5 having a spring like element. When the core drill reaches hole depth, a position sensor is operated by the dog of the cutting-in depth gauge and, therefore, the lift cylinder 5 is finely moved up and down several times by the difference between the velocity of the back pressure air stream of the lift cylinder 5 and exhaust flow velocity to improve the outflow of chips.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling machine for stone materials, concrete materials and the like.

[0002]

2. Description of the Related Art As a hole boring machine for a stone material such as a stone material or a concrete material, for example, a stone material is placed and fixed on a table, and a main shaft which is rotated by a motor is movably supported by an arm facing the table. An upright drilling machine that raises and lowers a spindle with a manual handle and a stone processing machine that raises and lowers a rotating spindle with a toggle type link mechanism have been used.
Further, a device is also devised in which the main shaft is supported by balance weights, springs, etc., and the cutting speed of the main shaft with respect to the stone material is finely adjusted. (For example, JP-A-51-111991 and JP-A-3-79309)

When a circular hole is to be bored from the surface of a stone material, a core drill is selected according to the size of the circular hole, the depth of the hole, the type of stone material, etc., and the core drill is attached below the main shaft and drilled. Was there. Since stone material is harder than metal and weak against impact and is brittle, the core drill was cut into the stone material, and the cut was adjusted while observing the cutting state of the core drill until the circular hole was completely drilled. That is, many of the drilling processes have been supported by many years of intuition and experience.

[0004]

When a boring process is performed manually on a stone material, in order to make a large and deep circular hole, the manual handle must be held for a long time, and during that time, the boring machine is separated from the processing machine. Because I can't
There was a problem that fatigue and work efficiency deteriorated. The conventional stone hole drilling method requires many years of intuition and experience, so the productivity is extremely low, it is inefficient and expensive, and the quality of drilling is greatly affected by the skill of the operator. There was also.

Especially when a drill is cut on the surface of a stone material,
If a sharp cut is suddenly made, the drill may bounce or slip, and the hole drilling position may be misaligned, and the deeper the hole, the more difficult it is for the cutting powder to be discharged. Therefore, the present invention has been made in view of such problems of the prior art, and an object thereof is to feed a main shaft by a manual handle and an elevating cylinder to efficiently form a circular hole in a stone material. It is an object of the present invention to provide a drilling machine capable of being drilled.

[0006]

In order to achieve the above object, a machine for drilling holes in a stone material according to the present invention is provided on the outer side of the lower half of a rotary spindle supported by an arm of a stone machine body.
An outer cylinder that lifts up and down with the main shaft and rotatably supports the main shaft is provided, and an elevating cylinder and a cut depth gauge are attached to the outer cylinder.
The arm is equipped with a manual handle that meshes with the outer cylinder, the lift cylinder and the position sensor of the cut depth gauge are connected to the compressed air passage, the operation panel of the compressed air passage is attached to the arm, and the outer cylinder is lowered with the manual handle. The core drill attached to the lower part of the main shaft is fed until it bites into the stone material, and the position sensor and the compressed air passage feed the core drill to a predetermined hole depth.

[0007]

[Operation] A main shaft and an outer cylinder attached to the outside of the lower half of the main shaft are first lowered by a manual handle until the core drill installed under the main shaft bites into the stone material, and then sent by an elevating cylinder with a spring-like element. Therefore, a predetermined hole can be efficiently drilled. Further, by automating the feeding of the lifting cylinder by the operation panel, the drilling efficiency can be further improved. When the core drill reaches a predetermined hole depth, the depth sensor attached to the outer cylinder detects the position sensor and stops the feed of the spindle.

[0008]

EXAMPLE First, a schematic structure of a stone processing machine will be described with reference to FIGS. 1 and 2. The processing machine main body 1 has a main pillar 1b standing upright at the center rear part of a bed 1a that is long in the left-right direction, and the main pillar 1b is The arm 1c facing the bed 1a is extended forward from the upper part, and the arm 1c
The main shaft 2 is rotatably supported at the tip of the
A table 11 is provided on the bed 1a, which is capable of traveling in the left-right direction, and is capable of traveling in the front-rear direction on the vehicle 11.
This is provided with 12, and the stone material A is placed and fixed on the table 12, and the holed portion of the stone material A is positioned below the main shaft 2.

Next, the structure of the punching machine according to the present invention will be described with reference to FIGS. 3 to 6. The drilling machine moves up and down along with the main shaft 2 around the lower half of the main shaft 2 supported by the arm 1c of the machine body 1. , An outer cylinder 3 that rotatably supports the main shaft 2,
The lifting cylinder 5 is attached to the upper part of the outer cylinder 3, the arm plate 32 is projected outward from the lower end of the outer cylinder 3, and the arm plate 32 is provided with a cutting depth gauge 6 parallel to the outer cylinder 3, and the arm 1c is cut. The position sensor 7 of the depth gauge 6 and the manual handle 4 that meshes with the outer cylinder 3 are provided, the lifting cylinder 5 and the position sensor 7 are connected to the compressed air passage 9, and the operation panel 8 of the compressed air passage 9 is connected to the arm 1c.
The main shaft 2 is optionally moved up and down by the manual handle 4 and the lifting cylinder 5.

The main shaft 2 is provided with a spline groove 2a in the upper half,
A bearing 23 and a pulley 21 rotated by a motor M are fitted and locked in the spline groove 2a, and a core drill D is attached to a lower portion of the main shaft 2.
It can be moved up and down while being attached. The outer cylinder 3 is rotatably fitted around the lower half of the main shaft 2,
A rack 13 parallel to the main shaft 2 is attached to the outer circumference of the outer cylinder 3, and a pinion 14 attached to the tip of the manual handle 4 is meshed with the rack 13 as shown in FIG. 9 to rotate the manual handle 4. It goes up and down.

In the lifting cylinder 5, the piston 5b is fitted in the cylinder case 5a, and the piston rod 5c is inserted in the case 5a.
It projects further outside and reciprocates within the range of raising and lowering the spindle 2. The cylinder case 5a is mounted on the arm 1c and the rod
The push plate 15 is fixed to the tip of 5c, one of the push plates 15 is attached to the upper part of the outer cylinder 3, and the other of the push plate 15 is guided by the guide rod 25 which stands upright in the arm 1c. It goes up and down. Outer cylinder 3
The notch depth gauge 6 attached to the lower end of the dog stands upright to a height close to the ascending / descending range of the main shaft 2, and slides the dog 16 up and down according to the hole depth H.

In the compressed air passage 9, as shown in FIG. 5, an elbow speed controller 95 is connected between the top dead center side of the lift cylinder 5 and the position sensor 7, and the bottom dead center side of the lift cylinder 5 and the position sensor 7 are connected.
A speed controller 93, which is connected to a selector switch 92 that switches a constant air pressure feed direction by a regulator 91 and sets the cutting speed of the spindle 2 between the bottom dead center side of the lifting cylinder 5 and the selector switch 92. The check valve 94 for preventing backflow of air pressure and the air release button 97 in the cylinder case 5a are connected when the manual handle 4 is rotated. The operation panel 8 of the compressed air passage 9 is shown in FIG.
As described above, the selector switch 92 of the compressed air passage 9, the speed controller 93, and the air release button 97 are attached, and the start / stop switch 81 of the motor M and the rotation control switch are attached.
Install 82.

In the compressed air passage 9 of FIG. 7, a low speed speed controller 93a and a high speed speed controller 93b are connected in two systems between the bottom dead center side of the lifting cylinder 5 and the selector switch 92, and the speed is set in each system. Controller 93a,
The flip toggles 96a and 96b for operation of 93b are connected. On the operation panel 8 of the compressed air passage 9, a motor switch 81 and a rotation control switch 82 for the motor M are provided as shown in FIG.
As well as mounting the selector switch 92 of the compressed air passage 9
Attach the air release button 97 and the flip toggles 96a and 96b.

As the motor M, a well-known electric motor or an inverter motor is used. One motor mounting leg m1 is pivotally fixed to the arm 1c and the other mounting leg m2 is attached to the shaft of the mounting leg m1 as shown in FIG. It is swingably supported about a fulcrum, and the belt B is hung on the pulley 21 fitted in the rotary shaft R of the motor M and the main shaft spline groove 2a so that the tension of the belt B can be varied appropriately. ing.

Since the stone material boring machine according to the present invention has the above-described structure, the core drill D suitable for cutting is selected in advance and mounted on the lower side of the main shaft 2, while the table 12 is used.
The stone material A is mounted and fixed on the table 12, the table 12 and the carriage 11 are moved, and the drilled portion of the stone material A is positioned below the core drill D. Further, the rotation control switch 82 of the motor M and the speed controller 93 of the lifting cylinder 5 are set to the "low speed" state, and the selector switch 92 of the compressed air passage 9 is set to the neutral position. In the compressed air passage 9 provided with the two speed controllers 93a and 93b, the low speed speed controller
The flip toggle 96a connected to 93a is kept in the "low speed" state.

First, the motor M is started by the start / stop switch 81, the main shaft 2 is rotated, and then the manual handle 4 is rotated as shown in FIG. 11 while pressing the air release button 97 in the cylinder case 5a. If the cylinder 3 is lowered, the main shaft 2 together with the outer cylinder 3
Falls, and the core drill D mounted below the main shaft 2 approaches the stone material A. The manual handle 4 descends until the core drill D comes into contact with the upper surface of the stone material A, and is fed little by little until the core drill D bites into the stone material A. The biting of the core drill D into the stone material A is determined by the cutting sound. During that time, the gauge 6 attached to the outer cylinder 3 also descends as the main shaft 2 descends.

Next, the dog 16 of the cut depth gauge 6 is adjusted according to the hole depth H, and the rotation control switch 82 of the motor M and the speed controller 93 of the lifting cylinder 5 or the speed controllers 93a and 93b of the two systems are adjusted. Connect either flip toggle 96a or 96b to the type and hardness of the stone material A,
Alternatively, after changing the selector switch 92 of the compressed air passage 9 to “down” and lowering the elevating cylinder 5 after changing the type according to the type of the core drill D and the size of the circular hole a, the main shaft 2 and the outer cylinder 3 are subsequently separated. It is lowered by a lifting cylinder 5 having a spring-like element. Rotation control switch for motor M
82 is gradually turned in the high speed direction, and an appropriate cutting speed is selected by the speed controller 93 of the compressed air passage 9 or the flip toggles 96a and 96b.

When the core drill D reaches the hole depth H,
Since the position sensor 7 is activated by the dog 16 of the depth of cut gauge 6, the lifting cylinder 5 moves up and down a few times due to the difference between the back pressure air flow of the lifting cylinder 5 and the exhaust flow velocity to prevent the cutting powder from flowing out. Improve That is, the pressure side air of the lift cylinder 5 is exhausted from the throttle valve 17 of the position sensor 7. At that time, if the difference between the pressurizing side air and the back pressure side air is set so that the flow rate of the pressurizing side air becomes large, the vertical movement is repeated several times at the drilling position of the circular hole a, and then stopped. The vertical movement of the lifting cylinder 5 can be appropriately changed by the speed controllers 93, 93a, 93b.

After the process of forming the circular hole a in the stone material A is completed, the selector switch 92 of the compressed air passage 9 is first switched to "up", and the lifting cylinder 5 is moved up. After that, according to the setting of the compressed air passage 9, the stone material A can be sequentially formed with the circular holes a. These processes can be automatically operated, or can be manually operated as needed.

The drilling machine of the present invention is not limited to the above embodiment, and it is desirable to provide a water injection portion 22 at the lower end portion of the main shaft 2, for example, and a speed controller 93 for the compressed air passage 9, Or speed controller 93
It is also possible to set the cutting speed infinitely with the flip toggles 96a and 96b connected to the a and 93b. Further, even if the push plate 15 which is fitted and locked in the outer cylinder 3 is fitted and locked in the main shaft 2, the main shaft 2 can be moved up and down, and the position sensor 7 has a roller plunger with an exhaust throttle valve 17. It is also possible to use a valve. Further, the lifting mechanism for the main shaft 2 and the outer cylinder 3, the configuration of the cut depth gauge 6, the compressed air passage 9 of the lifting cylinder 5, the operation panel 8, etc., the mounting and fixing of the stone material A, the mounting procedure of the core drill D, and the drilling of holes. The operating procedure and the like of the processing machine can be appropriately changed without departing from the spirit of the present invention.

[0021]

Since the stone material boring machine according to the present invention has the above-described structure, it has the following effects. The main shaft and the outer cylinder attached to the outside of the lower half of the main shaft are first lowered by the manual handle until the core drill attached under the main shaft bites into the stone material, and then sent by the elevating cylinder with a spring-like element. Therefore, a predetermined hole can be drilled efficiently and accurately. Furthermore, by automating the feed of the lifting cylinder using the operation panel,
The drilling efficiency can be further improved.

Since the cutting depth gauge is attached to the outer cylinder that moves up and down together with the main shaft, the position sensor of the cutting depth gauge is attached to the arm, and the lowering of the main shaft is detected by the position sensor to stop the core drill. When the hole depth is reached, the dog of the cut depth gauge attached to the outer cylinder is detected by the position sensor, and the feed of the spindle is stopped. At that time, the difference between the pressurizing side air of the lifting cylinder and the throttle valve of the back pressure side air is set so that the flow rate of the pressurizing side air becomes large, and after repeating the vertical movement several times at the hole drilling position, If it is stopped, the cutting powder can be easily discharged. As a result, the working efficiency can be improved, and a large number of circular holes having a constant depth can be machined with high accuracy.

[Brief description of drawings]

FIG. 1 is a side view of a punching machine according to the present invention.

FIG. 2 is a front view thereof.

FIG. 3 is a sectional view of an essential part showing a lifting mechanism for a spindle.

FIG. 4 is a cross-sectional view of essential parts showing a lowered state of a spindle.

FIG. 5 is a circuit diagram of a compressed air passage.

FIG. 6 is a front view of a main part showing an example of connection of an operation panel.

FIG. 7 is a circuit diagram of a compressed air passage provided with two speed controllers.

FIG. 8 is a front view of an operation panel.

FIG. 9 is a partially cutaway plan view showing the relationship between the manual handle and the outer cylinder.

FIG. 10 is a plan view of an essential part showing a mounting example of a motor.

11 (A), (B), and (C) are action diagrams showing an example of a hole forming process.

[Explanation of symbols]

 1 processing machine body, 1c arm 2 spindle, 2a spline groove 3 outer cylinder 4 manual handle 5 lifting cylinder 6 depth of cut gauge, 16 dog 7 position sensor 8 operation panel 9 compressed air passage 12 table, 13 rack, 14 pinion, 15 Push plate 25 Guide rod, 32 Arm plate A Stone material, a circular hole, B belt, D core drill, M motor H hole depth

Claims (2)

[Claims] 1. An arm (1c) facing a table (12)
In the main body (1) of the processing machine that rotatably supports the rotary spindle (2), the main spindle (2) is lifted and lowered outside the lower half of the spindle (2), and the spindle (2) is rotatably supported outside. The cylinder (3) is provided, and the lifting cylinder (5) and the cut depth gauge (6) are attached to at least one of the main shaft (2) and the outer cylinder (3), and the cut depth gauge (6) is attached to the arm (1c). ), A manual handle (4) that meshes with the position sensor (7) and the outer cylinder (3) is provided, and the lifting cylinder (5) and the position sensor (7) are provided.
Is connected to the compressed air passage (9), and the main shaft (2) can be arbitrarily moved up and down by the manual handle (4) and the lift cylinder (5). 2. An elevating cylinder (5) is attached to the upper part of the outer cylinder (3) and a cut depth gauge (6) is attached to the lower part of the outer cylinder (3), and an operation panel (8) for the compressed air passage (9) is provided. Is attached to the arm (1c) of the main body (1) of the processing machine, and the spindle (2) and the outer cylinder (3) are first attached to the lower part of the spindle (2) by the manual handle (4). 12)
2. The machine for boring stone material according to claim 1, wherein the stone material (A) is placed until it bites into the stone material, and then the hoisting cylinder (5) feeds the stone material to a predetermined hole depth (H).