JP2508179Y2 - Device for attaching and detaching blades for finishing machines - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically attaching and detaching a blade used in a finishing machine.

[0002]

2. Description of the Related Art A finishing machine has, for example, a guide 1 for raising and lowering as shown in FIG. 1, and a knife mounting board 3 is lowered from a cover 2 attached to the chucking portion C.
Attach the blade T to the blade (see FIG. 2). To attach the blade T to the chuck portion C, stop the spindle 10 by applying a stopper, then hook it in the groove formed in the conventional chuck, hook it with a spanner, and loosen it by hand to insert the blade shaft. , I was trying to tighten the chuck again with a spanner. For this reason, if the mounting force of the blade is not constant and insufficient, there is a possibility of causing processing failure or accident, and if it is excessive, there was a problem that the blade cannot be smoothly removed next time. .

[0003]

The present invention has been made in view of the above points, and the problem is that the blade can always be attached with a constant torque and can be easily removed. That is.

[0004]

SUMMARY OF THE INVENTION To solve the above problems, the present invention is detachable from the main shaft 10 for fixing the main shaft 10.
The chuck 1 is provided with a stopper pin 23 that engages with the chuck 1.
1, a main gear 12 that can rotate integrally with it is attached, a drive shaft 14 having a gear set 13 that can mesh with the gear 12 is arranged in parallel with the main axis direction, and the tool removal direction is greater than the rotation torque in the tool installation direction. One of a pair of engaging members 16 and 17 having teeth 15 formed of two kinds of inclined surfaces which can be engaged with each other and whose rotational torque to the drive shaft 14 is set larger is attached to the drive shaft 14. 16 and 17 the other is attached to the shaft 19 of the rotary driving source 18 side, the gear set 13
Is a sun gear 13a that can rotate integrally with the drive shaft 14, and has the same teeth
By the planetary gear 13b that can revolve around the car 13a
The planetary gear 13b and the main gear 12 of the chuck.
The means for changing the combined position by changing the rotation direction of the drive shaft 14 is provided.

[0005]

EXAMPLE In the finishing machine shown in FIG. 1, a tool T is chucked to a spindle 10 mounted on a tool mounting board 3 by a chuck portion C.
Although it is mounted by the conventional method (see FIG. 2), the portion below the chuck constitutes the blade attaching / detaching device according to the present invention as shown in more detail in FIGS. 3 and 4. is there.

The main shaft 10 is supported by bearings 20, 20 and can be rotated by the rotational force of a main shaft motor 21. The main shaft 10 has several engaging holes 22 at appropriate places, and the rotation can be stopped by a stopper pin 23 that can project so as to be inserted therein. Two
Reference numeral 4 denotes a cylinder mechanism that causes the stopper pin 23 to protrude or retract, and is operated by electromagnetic force or air pressure.

The method of tightening the blade with the chuck 11 may be the same as a known method. An example thereof is shown in FIG. 4, in which a taper bush 25 formed so as to be able to engage with the chuck 11 in a concavo-convex manner is pressed against the taper bearing 26 at the tip of the main shaft by the chuck 11, and the inner surface 27 of the taper bush is used to cut the blade. The structure is such that the shaft portion S of T is tightened. Reference numeral 28 indicates an engaging portion between the chuck 11 and the bush 25, and 29 indicates a screwing portion between the chuck 11 and the main shaft 10.
The main gear 12 is attached to the base of the chuck 11 and the like so as to be rotatable integrally therewith by welding or the like.

A gear set 13 capable of meshing with the main gear 12 is attached to a drive shaft 14 provided parallel to the main shaft direction. The gear set 13 includes a sun gear 13a that is integrally rotatable with the drive shaft 14 and a planetary gear 13b that is always meshed with the sun gear 13a and is capable of revolving around the same axis. The meshing position is changed according to the rotation direction of the drive shaft 14.

At the other end of the drive shaft 14, a pair of engaging members 16 capable of meshing with teeth 15 formed of two kinds of inclined surfaces,
One of the seventeen 17 is attached and the other one of the engaging members 17
Is a shaft 19 driven by a motor which is a rotary drive source 18.
It is attached to. The teeth 15 are formed such that the rising angle of the inclined surface in the tightening direction of the chuck 11 is smaller than the rising angle of the inclined surface in the tightening direction of the chuck 11, and therefore, the tooth 15 is not necessarily attached when the chuck 11 is removed. A torque limiter that operates a torque equal to or greater than the torque is configured.
The high torque side of the tooth 15 may be a right angle or more with no torque limitation.

In each drawing, 31 is a torque limiter operation detection switch, 32 is a switch for confirming that the planetary gear 13b is in the retracted position, and in FIG. 1, 4 is a vise for fixing the work material, and 5 is an operation panel. 6 shows a control box provided with 6 on the front.

In the apparatus of the present invention thus constructed, the blade T can be easily attached and detached by simply selecting the rotation direction of the chuck by operating the operation panel and turning on the switch. That is, after confirming that the stopper pin 23 protrudes and the main shaft 10 is fixed , the shaft portion S of the tool T is chucked.
When it is inserted into the plug 11 and the switch is turned on, the shaft 19 on the drive source 18 side rotates in a fixed direction, and the engaging members 16 and 17 rotate the drive shaft 14 with a lower torque. In this case the planetary gear 13b rotates the chuck 11 at a predetermined torque tightening
Engagement and engagement of engaging members 16 and 17 when a certain torque is reached.
The switch 31 detects that the drive source 18 is turned off.
Since it is stopped , the blade T is in the attached state.

Then, the stopper pin 23 is removed and the main shaft 10
The blade T is rotated by rotating the motor 21.
It is possible to perform joint processing by. On the other hand, cutlery
When the drive source 18 is rotated in the opposite direction after attachment , the planetary gear 13
b is occupying the side opposite to that at the time of attachment, and the engaging members 16, 1
Via the chuck 7, the chuck 11 uses the higher torque to cut the blade shaft S
Tighten and chuck 11 becomes loose when a certain torque is reached.
In off, remove the blade T is able to ing.

[0013]

As described above, according to the present invention, the attachment of the cutting tool T to the finishing machine is controlled by the drive shaft 14.
The tool T can be detached with a torque equal to or higher than the attachment torque , and the position of the planetary gear 13b can be set at the position of the planetary gear 13b during detachment.
Since the rotation direction of 5 can be changed and switched , the effect that the attachment and detachment of the blade can be performed very easily and reliably.

[Brief description of drawings]

FIG. 1 is a front view of a finishing machine in which an apparatus according to the present invention is implemented.

FIG. 2 is a perspective view of a blade mounting portion.

FIG. 3 is a perspective view showing the entire device of the present invention.

FIG. 4 is a sectional view of a chuck portion.

Claims (2)

(57) [Scope of utility model registration request] 1. A blade T mounted on a spindle 10 of a finishing machine.
The shaft portion is capable insert the S, the chuck 1 which have a rotatable chuck 11 coaxially around at the stop state of the spindle 10
1 is a detachable device for fixing the spindle 10.
A stopper pin 23 that is removably engaged with the chuck 11 is provided , a main gear 12 that is integrally rotatable with the chuck 11 is attached to the chuck 11, and a drive shaft 14 having a gear set 13 that can mesh with the gear 12 is parallel to the main axis direction. 2 which are arranged in the same direction and are set to have a larger rotational torque in the blade removing direction than the rotational torque in the blade mounting direction, which can be engaged with each other.
A pair of engaging members 1 having teeth 15 made of inclined surfaces
One of Nos. 6 and 17 is attached to the drive shaft 14, and the engaging member 1
The other of 6, 17 is mounted on the shaft 19 on the side of the rotary drive source 18 ,
The gear set 13 is a sun gear that can rotate integrally with the drive shaft 14.
13a and a planetary gear 1 capable of revolving around the gear 13a
3b, the planetary gear 13b and the chuck main
The meshing position with the gear 12 is changed by changing the rotation direction of the drive shaft 14.
A blade attachment / detachment device for a finishing machine, which is configured to be switched . 2. The planetary gear 13b is in the retracted position.
The device for attaching and detaching a blade for a finishing machine according to claim 1, wherein a switch 32 for confirmation is arranged in the vicinity of the gear set 13 .