JP2505854Y2 - Fixed position stop device for spindle in upright ballboard - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an upright drilling machine, in which a spindle is always stopped at a fixed position such that its knuckle hole exactly coincides with that of the quill so that the tool of the spindle can be easily replaced. The fixed position stop device of

[0002]

2. Description of the Related Art A fixed position stop device for a spindle in a conventional upright drilling machine of this type (hereinafter, simply referred to as a drilling machine) is not found.

In the conventional drilling machine of this type, the main shaft is stopped by switching the switch to a natural stop.

[0004]

In the above-mentioned conventional drilling machine, when the switch is cut to stop the spindle, the stopping position of the spindle varies, and the direction of the knuckle hole of the spindle is different each time. It is unlikely that the kotatsu holes will match the quill holes.

On the other hand, in this type of drilling machine, when the tool of the spindle is removed in order to replace the tool such as the drill of the spindle, the knucker is hammered into the knuckle hole and the knuckle hole of the spindle, and the tool is extruded by the knuckle. To remove.

Therefore, in the conventional drilling machine, every time the tool of the main spindle is removed to replace the tool of the main spindle, after the main spindle is stopped, the worker inserts a knuckle into the quill hole of the quill. However, the main shaft must be manually rotated so that the cotter hole in the main shaft matches the cotter hole in the quill.

By the way, in this type of drilling machine,
Due to the nature of the drilling machine, the spindle is rotated by 20 to 30 gears from the rotary shaft of the motor that rotates at high speed, so that the spindle is rotated suitable for drilling.

Therefore, in terms of dynamics, the high-speed side, that is, the motor side can be rotated with a very small force, but conversely, the low-speed side, that is, the main shaft side cannot be rotated without a large force.

Therefore, when there are, for example, three kinds of drills related to one work, the operator must match the knuckle hole of the main shaft with the knuckle hole of the quill each time one type of drilling is completed. This means that the spindle must be fully rotated by hand, which requires a great deal of labor for exchanging the drill, and it is very time-consuming and inconvenient for work.

Particularly, in a large-sized drilling machine, the rotation reduction ratio is large, and it is impossible to easily rotate the main shaft by hand. Therefore, in this case, the operator puts the speed change lever for rotating the main shaft in the neutral position so that the main shaft rotates lightly, but in this case, when the drill is replaced, the work flow is changed. Is interrupted, and it takes more time and labor, which is inconvenient for work.

[0011]

According to the present invention, when the switch of the drilling machine is cut, the main shaft always stops when its knuckle hole is exactly aligned with the quill hole of the quill. An object of the present invention is to provide a fixed position stopping device for a spindle in an upright drilling machine which allows the knucker to be easily and smoothly struck to extrude the tool to quickly replace the tool on the spindle, and which is convenient for work.

That is, the lower part of the front and rear walls of the quill (2) in which the rack (18) meshes with the lower part of the front of the machine casing (1) so as to be able to move up and down and engages with the pinion (21) of the operating shaft (20). Vertically extending cotter holes (10) are provided to face each other, and a bottom plate (19) is provided at the lower end, and small and large gears (2) are provided above the quill (2) in the front upper part of the machine casing (1).
2) and (23) are rotatably supported on the passive cylinder (4), and the upper spline shaft (6) of the main shaft (5) which is rotatably supported by being inserted into the quill (2) is connected to the passive cylinder (4). 4) Slidingly engages with the spline hole in the main shaft (5), and at the position facing the vertically elongated cotter hole (10) of the quill (2), a taper insertion hole ( 8) A vertically extending cotter hole (9) communicating with the upper end portion of 8) is formed, a dog (11) is attached to the passive cylinder (4), and a fixed position is set on the machine casing (1) so as to face the dog (11). The sensor (12) to be aware of is arranged close to the motor casing (1), the motor (3) is attached to the rear portion of the machine casing (1), and the intermediate shaft (24) and the input shaft (25) are rotatably arranged side by side in the middle portion of the motor casing (1). 3) drive shaft (26) and input shaft (2
5) is connected by a belt transmission mechanism (27), and a drive gear (28) is attached to the input shaft (25) of the intermediate shaft (2).
4) The small and large diameter gears (2) of the passive cylinder (4) are alternately arranged while meshing with the drive gear (28) of the input shaft (25).
2), (23) large and small diameter gear (2
9) and (30) provided with a speed change gear (31) slidably fitted therein, and the machine casing (1) includes an inverter (13) with a fixed position stopping function for the main shaft (5) and a motor (3). Starting and stopping switches (14), (15), etc. are provided, and the motor (3),
Between the sensor (12), the inverter (13), the start and stop switches (14), (15) and the power supply (16),
If the start switch (14) is operated, the motor (3)
When the drive shaft (26) of the motor is started and the stop switch (15) is operated, a brake is applied to the motor (3) by the speed change function of the inverter (13), and the drive shaft (2) of the motor (3) is operated.
6) Sudden deceleration control to suddenly decelerate and stop, then rotate at low speed, and then form an electric circuit that stops the driving shaft (26) of the motor (3) by a signal from the sensor (12). It constitutes a fixed position stop device of the spindle in the drilling machine, and when the switch of the drilling machine is cut, the spindle always stops when its knuckle hole exactly matches the quill hole.
The purpose is to slidably engage the spline shaft of the spindle for the purpose of swiftly tapping the knuckle into the quill hole of the quill and the spindle to push out the tool and quickly replace the tool of the spindle for convenient work. Then, the dog is mounted on the passive cylinder that rotates at high speed integrally with the main shaft, and the sensor is placed close to the machine casing so as to face the dog and the stop switch is operated. This is achieved by suddenly decelerating the drive shaft to stop suddenly, then rotating it at a low speed, and then stopping the drive shaft of the motor in response to a signal from the sensor.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of the present invention, and the construction thereof will be described. (17) is a support for a drilling machine, and the rear part of the machine casing (1) is provided at the upper end of the support (17). Stick to it. (2) is a quill that is fitted in the lower front part of the machine casing (1) so as to be able to move up and down, and a rack (18) is provided on its rear surface, and vertically elongated cotter holes (10) are formed in the lower parts of the front and rear walls. Then, a pad (19) is provided at the lower end. Reference numeral (20) denotes an operating shaft that is rotatably laterally inserted through a lower part of the machine casing (1) behind the quill (2), and a pinion (21) provided in the machine casing (1) is provided with a quill (2). ) Is engaged with the rack (18).

Reference numeral (4) is a passive cylinder rotatably supported above the quill (2) in the front upper part of the machine casing (1), with a small diameter gear (22) on the upper part and a large diameter gear (23) on the lower part. Are provided respectively. (5) is a main shaft which is inserted into the quill (2) and is rotatably supported, and a spline shaft (6) of its upper protruding portion is slidably engaged with a spline hole in the passive cylinder (4). At a position below the spindle (5) facing the cotter hole (10) of the quill (2), a vertically long cotter hole (9) communicating with the upper end of the tapered insertion hole (8) of the tool (7) such as a drill. ) Is drilled. Reference numeral (7) is a drill of a tool which is detachably inserted into the tapered insertion hole (8) of the main shaft (5).

Reference numeral (11) is a dog attached to the front surface of the upward protruding portion of the passive cylinder (4), and a proximity switch (12) of a sensor is closely arranged on the machine casing (1) so as to face the dog (11). To do.

(3) is a general-purpose motor with a brake attached to the rear portion of the machine casing (1) or a general-purpose motor, (2)
Numerals 4) and (25) are an intermediate shaft and an input shaft that are rotatably arranged side by side in the front and rear direction in the upper intermediate portion of the machine casing (1). The driving shaft (26) and the input shaft (25) of the motor (3). Of the input shaft (2
A drive gear (28) is mounted in the machine casing (1) of 5), and a large diameter gear (29) is attached to the drive gear (28) on the intermediate shaft (24).
Alternately while meshing with each other Small gear wheel (22) of passive cylinder (4)
A gear wheel (31) having a large-diameter gear (29) and a small-diameter gear (30) which are engaged with and disengaged from the large-diameter gear (23) is slidably fitted.

(13) is an inverter with a fixed position stopping function for the spindle (5) mounted on the rear surface of the machine housing (1), and (32) is an operation box mounted on the front surface of the machine housing (1), on which a motor is mounted. A start button switch (14), a stop button switch (15), etc. of (3) are provided. Then, the stop button switch (15) was operated between the motor (3), the proximity switch (12), the inverter (13), the start button switch (14), the stop button switch (15) and the power supply (16). At this time, the main shaft (5) forms an electric circuit in which the cotter hole (9) is oriented in the front-rear direction and coincides with the cotter hole (10) of the quill (2) and stops. (33) is a knucker that is inserted through the quill (2) and the knuckle holes (10) and (9) of the main shaft (5) and hammered, and (34) is a belt transmission mechanism (2).
7), a cover of the proximity switch (12) and the like.

The operation will be described. As shown in FIG. 1, when the large-diameter gear (29) of the speed change gear (31) meshes with the small-diameter gear (22) of the passive cylinder (4), the start button switch (14) is pushed to drive the motor (3). Driving shaft (26)
Starts, and the belt drive mechanism (2
7), the input shaft (25), the drive gear (28), the large diameter gear (29), and the small diameter gear (22), the passive cylinder (4) with the dog (11) and the main shaft (5) rotate together at high speed. .

Accordingly, after that, when the operating shaft (20) is rotationally operated and the pinion (21) and the rack (18) of the quill (2) are engaged with each other, the quill (2) is lowered.
The spindle (5) with the drill (7) descends integrally with the quill (2), and the drill (7) is used for drilling.

On the other hand, with the rotation of the passive cylinder (4) with the dog (11), the proximity switch (12) is moved every time the dog (11) passes through the proximity switch (12) as shown in FIG.
The signal is output once.

When the stop button switch (15) is pressed after the machining by the drill (7) is finished, a deceleration command is output to the motor (3) by the shift function of the inverter (13) and the motor (3) is braked. Then, as shown in FIG. 7, the motor (3) is suddenly decelerated and suddenly decelerated to stop. Then, after the motor (3) is once stopped, this time a low-speed rotation command determined for the motor (3) is output to rotate the motor (3) at a low speed.

In the above state, the proximity switch (1
The signal pulse width from 2) is also long so that the signal can be reliably read easily, and the inertia of the rotation of the passive cylinder (4) with the main shaft (5) is small. Therefore, the proximity switch (12) is turned ON-O in the low speed rotation range of the passive cylinder (4) with the main shaft (5).
At the moment when the FF signal is monitored and the ON pulse signal is input, the motor (3) and the passive cylinder (4) with a spindle (5) connected to it by a transmission mechanism are stopped, and the spindle (5) is stopped.
Is always at a fixed position, that is, the cotter hole (9) of the main shaft (5) is oriented in the front-rear direction and the cotter hole (1) of the quill (2) is
Stop at the position that matches 0).

Therefore, as shown in FIG. 1, the quill (2) is slightly lowered, and as shown in FIG. 2, the copter (33) is inserted into the quill (2) and the spindle holes (10) and (9). Then, the drill (7) is pushed out from the inside of the tapered insertion hole (8) by the knuckle (33) and removed from the spindle (5).

The speed change gear (31) is lowered from the upper position shown in FIG. 1 along the intermediate shaft (24) so that the small diameter gear (30) becomes the large diameter gear (23) of the passive cylinder (4). When meshed, the gears (30), (2
After 3), the passive cylinder (4) with the dog (11) and the main shaft (5) integrally rotate at a low speed.

The proximity switch (12) of the above sensor
Even if a magnetic sensor is used instead of the above, the same operation as described above is performed.

The present invention can be applied to a tabletop drilling machine, a multi-axis drilling machine and the like in the same manner as described above.

[0027]

The fixed position stopping device for the spindle in the upright drilling machine of the present invention has the following advantages.

(1) When the stop switch is operated to stop the spindle, regardless of the number of rotations of the spindle, the size of the tool, the length of the tool, etc., the spindle always has its knuckle hole exactly aligned with the quill hole. Since the tool will stop, when replacing the tool attached to the spindle, immediately after stopping the spindle, tap the knuckle across the quill and the knuckle hole in the spindle and tap the tool from the taper insertion hole in the spindle. It can be pushed out and removed, and the tool of the spindle can be replaced easily and quickly, which saves labor and time and is convenient for work.

(2) When the main shaft is stopped, the drive shaft of the motor is suddenly decelerated by the speed change function of the inverter to suddenly decelerate and stop, and then the motor is rotated at a low speed. Enter to stop the passive cylinder with the spindle. Therefore,

(A) It is easy to rotate the driving shaft of the main shaft at a predetermined low speed.

(B) Immediately before the stop of the passive cylinder with the main spindle, the signal pulse width from the sensor is long to make it easy to read the signal, and the inertia of the rotation of the passive cylinder with the main spindle is small. The cotter hole always stops at a fixed position that surely matches the quill's cotter hole.

(3) Since the dog is provided on the passive cylinder that rotates integrally with the spindle on which the tool is attached, and the fixed position stop control of the spindle is electrically performed by the inverter detected by the sensor provided facing the dog. , It is possible to accurately stop the spindle at a fixed position.

(4) Only by providing a sensor on the main shaft,
Since the fixed-position stop of the spindle is performed electrically, a mechanical fixed-position stop mechanism of the spindle is unnecessary, and the structure is simple and easy to manufacture at low cost.

(5) Since the motor connected to the main shaft is controlled, the main shaft can be directly and suddenly stopped regardless of gear shift, and the main shaft can be stopped rapidly, resulting in shortened stop time and good workability.

(6) Since only the fixed position of the spindle is stopped, a simple fixed position control circuit is sufficient, the electric circuit is simple, and it can be manufactured at a low cost.

(7) Since it is an electric control, it is not damaged by an external impact and has a high durability.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an upper portion of an upright drilling machine according to an embodiment of the present invention.

FIG. 2 is an enlarged side cross-sectional view of a main part of the above, showing a middle part cut away.

FIG. 3 is a plan view of the same.

FIG. 4 is a front sectional view of the tool mounting portion.

FIG. 5 is an explanatory plan view showing the electric circuit.

FIG. 6 is an explanatory diagram of the inverter unit.

FIG. 7 is a table showing an electric control operation for stopping the spindle at a fixed position.

FIG. 8 is an explanatory plan view showing an electric circuit of an upright drilling machine according to another embodiment of the present invention.

[Explanation of symbols]

 1 machine casing 2 quill 3 motor 4 passive cylinder 5 main shaft 6 spline shaft 7 tool 8 taper insertion hole 9 kotatsu hole 10 kotatsu hole 11 dog 12 sensor 13 inverter 14 start switch 15 stop switch 16 power supply 17 support 18 rack 19 patch metal Working shaft 21 Pinion 22 Small diameter gear 23 Large diameter gear 24 Intermediate shaft 25 Input shaft 26 Driving shaft 27 Belt transmission mechanism 28 Drive gear 29 Large diameter gear 30 Small diameter gear 31 Speed change gear 32 Operation box 33 Kotatsu 34 Cover

Claims (1)

(57) [Scope of utility model registration request] 1. Vertically extending cotter holes are formed in the lower portions of front and rear walls of a quill in which a rack is engaged with a pinion of an operating shaft so as to be vertically movable in a lower portion of the front of a machine casing, and which are opposed to each other at a lower end thereof. Above the quill, above the quill, a passive cylinder provided with small and large diameter gears is rotatably supported in the upper front part of the machine casing, and above the main shaft rotatably supported by being inserted into the quill. The spline shaft is slidably engaged with the spline hole in the passive cylinder, and a vertical cotter communicating with the upper end of the taper insertion hole of the tool is located at a position below the main shaft of the spline shaft and facing the vertically long cotter hole of the quill. A hole is bored, a dog is attached to the passive cylinder, a sensor for detecting a fixed position is arranged close to the machine casing so as to face the dog, a motor is attached to the rear of the machine casing, and an intermediate shaft is attached to the middle portion. And the input shaft rotatably side by side, The driving shaft of the motor and the input shaft are connected by a belt transmission mechanism, a driving gear is attached to the input shaft, and the intermediate shaft is alternately engaged with the driving gear of the input shaft while alternately having a small diameter and a large diameter of the passive cylinder. Gears with large and small diameters for engaging and disengaging with large diameter gears are slidably fitted, and an inverter with a fixed position stop function for the main shaft, a start and stop switch for the motor, etc. Is provided between the motor, the sensor, the inverter, the start / stop switch and the power supply, if the start switch is operated, the driving shaft of the motor is started, and if the stop switch is operated, the speed change function of the inverter is changed. The brakes act on the motor to suddenly decelerate and control the motor drive shaft, then suddenly decelerate and stop, then rotate at a low speed, and then stop the motor drive shaft by the signal from the sensor. Fixed-position stop device of the main shaft in an upright drilling machine obtained by forming an electrical circuit for.