JPS6317603Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic rotation control device for a manual operation handle of a drilling machine, and more specifically, the invention relates to an automatic rotation control device for a manual operation handle of a drilling machine. The present invention relates to an automatic rotation control device that is attached to an existing drilling machine for drilling objects and automatically rotates the manual operation handle.

A conventional drilling machine or lathe drills or cuts a workpiece while sending its main spindle or tool rest in a predetermined direction by rotating an operating handle, and has a simple structure and is inexpensive. It is also widely used because of its high versatility.

However, the operation of the operating handles in these conventional machine tools requires slight changes depending on the material and shape of the workpiece, and machining accuracy varies depending on the skill level of the worker. The disadvantage was that it was inefficient and tiring because it could only operate a few machine tools. Against this background, automation of machining has been progressing in recent years, and machine tools with highly automatic control are currently being supplied to the market, but they are extremely expensive.
Furthermore, it has not been widely adopted because it is not necessarily easy to operate and lacks versatility.

On the other hand, it has also been proposed to dismantle a part of an existing machine tool, such as a drilling machine, add additional work to that part, and incorporate an automatic spindle feed mechanism into the drilling machine body. However, as mentioned above, this conventional automatic spindle feeding mechanism requires special processing on the existing drilling machine, making the structure unnecessarily complicated, difficult to install on the existing machine, and quite expensive. It was hot.

The present invention was developed in view of these circumstances, and its purpose is to have a simpler structure, lower cost, fewer failures, and to be able to process existing drilling machines compared to conventional devices of this type. There is no need to remove any component of the existing drilling machine itself, and even users with existing drilling machines can easily install or remove it, and the feed rate of the spindle during drilling This is a drilling machine that can slow down the feed rate and increase the feed rate at other times, which, in combination with automation of the rotation of the manual operation handle, can greatly improve the machining efficiency and accuracy of the drill press, and can further reduce work fatigue. An object of the present invention is to provide an automatic rotation control device for a manually operated handle.

That is, in order to achieve the above-mentioned object, the present invention is designed to attach the manually operated handle to a drilling machine that drills a hole in a workpiece by rotating the manually operated handle and sending a main shaft to which a drill is attached in a predetermined direction. In an automatic rotation control device that automatically rotates, a motion conversion mechanism that generates linear motion in a pressure receiving member by the pressure of fluid supplied from a fluid pressurizing device and converts the linear motion of the pressure receiving member into rotational motion; , an engaging part such as a recessed groove that can be freely engaged and detached from the manual operating handle provided on an existing drilling machine is formed, and the motion converting mechanism is connected to the manual operating handle with the engaging part. It has a connecting member that transmits rotational motion to the manual operation handle, and a valve inserted in the fluid communication path that connects the fluid pressurizing device and the motion converting mechanism, and the valve is manually operated in one direction. the manual operating handle is rotated by a predetermined amount corresponding to a stroke necessary for drilling a hole in a workpiece with the drill; When the valve is moved in the other direction in response to the motion conversion mechanism, it stops supplying the fluid to the pressure receiving member and discharges the fluid that was acting on the pressure receiving member. A fluid control mechanism to be controlled, and a feed that does not respond to the linear motion of the motion conversion mechanism at an initial stage of operation but responds from a stage after the middle of the operation to apply a braking force to the motion conversion mechanism due to fluid resistance. The lower end is fixed onto the base using a speed control mechanism and a mounting bolt inserted into a bolt insertion hole drilled in the base of the existing drilling machine, and the connecting member provided at the upper end is manually operated. The present invention is characterized by comprising a support member that supports the handle while being connected to the handle.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIGS. 1A and 1B are a front view and a side view showing the structure of an embodiment in which the present invention is applied to a drilling machine.

First, the general configuration of a drilling machine will be explained. A workpiece mounting table (so-called table) 3 is mounted on the base spindle 2 erected on the drilling machine base 1.
It is fitted in such a way that it can move up and down. That is, a rack 4 provided on the side of the drilling machine support shaft 2 and a pinion (not shown) provided on the side of the workpiece mounting table 3 are engaged with each other, and by turning this pinion with the lifting handle 5, the above-mentioned The workpiece mounting table 3 can be moved up and down, and after being adjusted to a predetermined height, it is fixed to the drilling machine support shaft 2 by tightening the locking screw 6. A drilling machine main body 7 is attached to the upper part of the drilling machine support shaft 2, and a spindle (so-called main shaft) 8 is supported downwardly on this drilling machine main body 7 so as to be freely removable and removable. A chuck tightening ring 9 for tightening and loosening the chuck 11 is connected thereto, and a drill 10 as a drilling (or drilling) tool is fixed to the spindle 8 by the chuck 11.
Therefore, the spindle 8, chuck tightening ring 9, drill 10, and chuck 11 rotate integrally. A belt cover 12 is installed on the top of the drilling machine main body 7, and inside this belt cover 12, a rotating force is transmitted to the spindle 8 from a drive machine (for example, a motor) 14 fixed to the rear of the drilling machine main body 7 by a fixing member 13. A belt for transmitting power,
A pulley (none of which is shown) for hanging the belt is provided. The drill press body 7 is further provided with a handle bearing 15, and a shaft inside this bearing 15 is connected to a handle 16. A conversion mechanism (not shown) consisting of, for example, a pinion-rack mechanism is provided between the shaft to which the handle 16 is connected and the spindle 8, for converting the rotational movement of the handle 16 into vertical movement of the spindle 8. A spring (not shown) is provided within the handle bearing 15 for raising and returning the spindle 8.

To explain the operation of the drilling machine having the above configuration, the workpiece mounting table 3 on which the workpiece is placed is moved by turning the lifting handle 5 in consideration of the descending stroke of the drill 10 and the drilling depth of the workpiece. Set its height. Next, the workpiece is placed on the mounting table 3 and positioned so that the location where a hole needs to be drilled coincides with the center of the drill 10. When the handle 16 is rotated, the drill 10 rotates and descends together with the spindle 8, thereby drilling a hole in the workpiece. When the hole drilling work is completed, handle bearing 1
The spring installed in the spindle 8
is lifted back to its original position.

Next, a description will be given of the configuration of an embodiment in which the present invention is mounted on a drilling machine.

In FIGS. 1A and 1B, the attachment mounting base 17 is removable onto the drilling machine base 1 by means of mounting bolts 18 inserted into elongated bolt insertion holes drilled in the existing drilling machine base 1. A stay 20 that supports the drive body 19 and the like is vertically mounted on the mounting base 17 and fixed with a tightening bolt 21. The upper end of the stay 20 is fitted into a stay introduction part (hole) 22 formed in the drive body 19 and is tightened and fixed with a bolt 23, so that its mounting position can be changed to some extent. Drive body 1
9 incorporates a motion conversion mechanism that converts linear motion into rotational motion as will be described in detail later, and a drilling machine is installed at the end of the drive shaft 24 (the left end in FIG. 1A), which is the rotating part. A connecting wheel 25 is fixed as a connecting member that transmits rotational force to the connecting wheel 25.
is the handle 1 installed on the existing drilling machine.
The spindle 8 of the drilling machine is moved up and down by the engagement of the two.

2A, B, and C are front views, cross-sectional views, and right side views showing more specific configurations of the drive body including the motion conversion mechanism, connecting members, etc., which are the main parts of the present invention, and FIG. It is a left side view of the connecting wheel which is a connection member.

In FIGS. 2A, B and C, the drive body 19
A stay introduction part 22 for fixing the drive body 19 through the stay 20 (first illustration) is formed in the outer shell of the drive body 19, and a cylinder 26 is screwed into the lower part of the drive body 19. A cylinder cap 27 is screwed onto the lower end of the cylinder 26 to form a bottom surface of the cylinder 26. At the center of the cylinder cap 27, the inside of the cylinder 26 and the cylinder 2
6, an air supply/exhaust port 28 communicating with the outside is provided. A valve body guide 2 is provided on the side of the drive body 19.
9 is provided, and this valve body guide 29
A valve body 30 is fixed to the valve body 30, and its fixing position can be varied along the valve body guide 29. A valve 31 is fitted into the valve body 30, and two pipes A,
B is connected, and pipe A is connected to the valve body 30.
The pipe B communicates with an air machine such as an air compressor (not shown), and the pipe B communicates between the valve body 30 and an air supply/exhaust port 28 provided in the cylinder cap 27. Here, the pipes A and B are each attached by attachment members 32. A push pin 33 (in which a roller is loosely fitted in the illustrated case), located directly below the valve body 30 and facing the protruding area of the valve end of the valve 31, which will be described in detail later, protrudes from the drive body 19 to the outside and is arranged to be vertically movable. It is set up.
A rotating drive shaft 24 extends from one side of the drive body 19, into which a connecting wheel 25 is fitted and a slide fixing screw 3 is inserted.
4 and is fixed at a keyway 35 position formed in the drive shaft 24. Connecting wheel 2
5, the holes are positioned and shaped so as to engage with the handle 16 of the drill press (shown in the first figure) as shown in FIG. A handle groove 36 serving as an engaging portion is formed along the radial direction and is a concave groove having a substantially U-shaped cross section. A hydro checker 37 for controlling the rotational speed of the drive shaft 24 is attached to the upper part of the drive body 19, and a safety guide 38 is provided to prevent it from jumping out from the drive body 19. One end is fixed to the drive body 19 with a fixing screw 39.

FIG. 2B shows a side sectional view of FIG. 2A.

In the figure, a piston 40 is slidably fitted into a cylinder 26 that is screwed into the lower part of the drive body 19, and an O-ring 41 for airtight maintenance is provided at the sliding contact portion between the piston 40 and the inner wall of the cylinder 26. is inserted. Furthermore, a buffer material 42 is inserted between the piston 40 and the cylinder cap 27 to absorb the impact when the piston 40 descends and collides with the cap 27. The piston 40 has
The rod 43 is fixed by a mounting bolt 44, and the rod 43 is fitted between the rod 43 side surface of the piston 40 and the drive body 19 side, so that the piston 40 is constantly pressed downward. A spring 45 is disposed to force it. Rod 43
A rack 46 is provided on the circumferential side of the rack 46, and by meshing with a pinion 47, the linear motion of the rod 43 is converted into a rotational motion of the pinion 47, thereby rotating the drive shaft 24 which is integrated with the pinion 47. .
A rack guide roller 48 is pivotally supported by a guide shaft 49 on the opposite side of the pinion 47 with the rod 43 at the center.
It plays the role of guiding the vertical movement of 3. At the tip of the rod 43, that is, on the opposite side from the pinion 40, a push pin 33 is extended to the outside of the drive body 19, as shown in FIG. 2A, and moves up and down as the rod 43 moves. The upper end 50 of the rod 43 is further opposed to the lower end 52 of the piston rod 51 of the hydro checker 37.
This controls the speed of the rod 43. 53
The stay 20 (first illustration) is inserted into the stay introduction part 22.
54 is a bolt hole for attaching the hydro checker 37.

FIG. 2C is a side view of FIG.
FIG. 3 is a cross-sectional view showing two states of zero.

In Fig. 2C, a vertically elongated guide groove 55 is formed parallel to the rod 43 (see Fig. 2B) provided in the drive body 19, and is formed parallel to the valve body guide 29 so that the push pin 33 can be projected outward. The push pin 33 moves up and down along this guide groove 55 with the movement of the rod 43. The valve body guide 29 is fixed to the drive body 19 by the valve body guide fixing screw 56, and the valve body 30 is fitted into the dovetail groove 55 formed at the bottom of the valve body 30 as shown in Fig. 4.
7 is fitted to the valve body guide 29, and the valve body fixing screw 58 is screwed into the center of the dovetail groove 57 to fix the valve body.
(shown in FIG. 2) are respectively connected to the

5A and 5B show the configuration of an embodiment of the valve body, in which a valve 31 is fitted into a valve through hole 59 in the valve body 30; O-rings 60, 6 to prevent unnecessary leakage of air fed into 59
E-rings 65 and 66 are fitted into the valve head 63 and the valve end 64 in order to control the horizontal movement distance of the valve 1 and 62 and the valve 31 and to prevent them from coming out through the valve through hole 59. When the valve 31 is in the position shown in FIG. 5A,
The pilot hole B and the pilot hole C communicate with each other through the valve through hole 59, so that the air in the cylinder 26 (FIG. 2B) is discharged to the outside from the pilot hole C. 5th
In the position shown in Figure B, the pilot hole A and the pilot hole B are communicated through the valve through hole 59, so that the air compressor (not shown)
The air sent through the cylinder 26 is sent through the pilot hole B into the cylinder 26 (FIG. 2B). Here, if the valve 31 is located at the position shown in FIG. 5B,
The valve end 64 is positioned so as to face the movement range of the push pin 33 that protrudes outward from the guide groove 55 formed in the drive body 19.

Next, the operation of one embodiment of the present invention having the above configuration will be explained.

After placing the workpiece on the workpiece mounting table 3 (shown in the first diagram) of the drilling machine and setting it at the machining position, the drive machine (motor)
14 is started by a switch (not shown) to rotate the drive machine 14, and then the valve head 63 of the valve 31 of the valve body 30 fixed to the drive body 19 is pushed in by hand, as shown in FIG. Set to state B. Then, the air sent from the air compressor that has been activated in advance is sent from the pilot hole A of the valve body 30 through the pipe A to the pilot hole B via the valve through hole 59, and then flows through the pipe B into the cylinder 26. will be introduced to. The air introduced (supplied) into the cylinder 26 pushes up the piston 40 as a pressure receiving member against the expansion elasticity of the spring 45 wound around the rod 43. Therefore, the rod 43 connected to the piston 40 and the rack 46 provided on the side surface of the rod 43 also rise, and the pinion 47 meshing with the rack 46 rotates. This rotation of the pinion 47 causes the drive shaft 24 to rotate, and the connecting wheel 25 fixed to the drive shaft 24 rotates. Since the connecting wheel 25 is engaged with the handle 16 of the drilling machine (first illustration), this causes the spindle 8 of the drilling machine (first illustration) and the chuck 11 to be connected to the spindle 8.
The drill 10 attached thereto is lowered while rotating together. Therefore, the drill 10 can be used to drill holes in the workpiece. When the spindle 8 and drill 10 descend by a predetermined distance,
In other words, when the drive shaft 24 (operation handle 16) rotates a predetermined number of revolutions, or the piston 40
When the moving distance of (rod 43) reaches a predetermined amount,
The rod 43 is integrally connected to the rack 46.
The valve end 64 of the valve 31 protrudes from the upper end of the guide groove 55 of the drive body 19 with the push pin 33 attached to the tip of the valve end 64 at a predetermined raised position.
Push and twist to get the state shown in Figure 5A. At this time, the air sent from the air compressor to the pilot hole A cannot enter the valve through hole 59 because the pilot hole A is blocked by the large diameter part of the valve 31. On the other hand, the air inside the cylinder 26 is pipe B
It passes through the pilot hole B, passes through the valve through hole 59, and is discharged to the outside from the pilot hole C, where the small diameter portion of the valve 31 is located. Therefore, the upward pressure on the piston 40 is released and the piston 40 is pressed down by the spring 45. When the rod 43 descends, the pinion 47 that meshes with the rack 46 provided on the rod 43 rotates, and the rotation of this pinion 47 is transmitted from the drive shaft 24 to the connecting wheel 25, and the handle 16 of the drilling machine (as shown in the first figure)
Rotate in the opposite direction to the above. On the other hand, the handle 16 side of the drilling machine also receives the multiple torque of the spring provided in the handle bearing 15 at the same time, rotates in the opposite direction, and lifts the drill 10 together with the spindle 8 from the workpiece to its original position. The state shown in Figure 1A is restored.

Next, with reference to FIG. 2, the operation of the feed rate control mechanism that adjusts the feed rate of the spindle using the braking force due to fluid resistance will be described. The feeding speed of the spindle 8 of the drilling machine is controlled by adjusting the moving speed of the rod 43 (piston 40), which is a motion conversion mechanism. That is, the rod 43 is brought into contact with the piston rod 51 of the hydro checker 37, which is provided opposite to the upper end 50 of the rod 43, at a certain point, so that the rising speed of the rod 43 is adjusted. Hydro checker 37 above
The piston itself is based on the principle of a dart pot, and has a structure that allows the speed of the piston rod 51 to move in and out to be varied.

Further, the descending distance of the spindle 8 of the drilling machine can be adjusted by using a valve body 30 installed in the drive body 19.
This is done by changing the fixing position of the drive body 19 with respect to the drive body 19. In other words, the valve 31 is pushed by the push pin 33 that is integrally connected to the rod 43.
The positional relationship in which the valve body 30 changes from the state shown in FIG. 5B to the state shown in FIG. 5A is adjusted by adjusting the position of the valve body 30, thereby adjusting the descending distance of the spindle 8 of the drilling machine.

The drive body 19 described above is fixed to the drilling machine by a support member consisting of a stay 20 (shown in the first diagram) and an attachment mounting base 17, and thereby the connecting wheel 25 is connected to the handle 16.
(as shown in the first diagram) in a connected state. The mounting height of the drive body 19 on the drilling machine can be adjusted to some extent.

Note that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist thereof.

For example, the mechanism for converting direct motion into rotational motion is not limited to the combination of a rack and pinion as in the above embodiment, but may also be a mechanism using a piston and a crank, a pin rack and a pinion, or the like.

Furthermore, V-packing can be used instead of the O-ring used in the sliding contact portion between the piston and the cylinder. This V-packing has the advantage that a V-shaped groove is cut toward the cylinder cap, and when air is fed into the cylinder chamber, the V-shaped groove opens due to air pressure, increasing airtightness.

Furthermore, not only air but also other gases or liquids such as oil can be used as the pressurized fluid.

As detailed above, according to the present invention, firstly,
Since the automatic rotation control device for the manual operation handle of the present invention can be installed without removing or disassembling any of the components of the existing drilling machine and without performing any special additional work, the user of the drilling machine can install it by himself/herself. , removal or repair work can be easily performed.

Second, the structure is simple, and in particular, the fluid control mechanism does not use electric parts such as limit switches and solenoids that are conventionally used to control the supply and discharge of fluid to the pressure receiving member. The feed is started by manual operation, and the feed is stopped and discharged in response to the motion conversion mechanism.
There is no room for electrical failure, there is very little risk of mechanical failure, and it can be manufactured at low cost.

Third, by applying the present invention to existing drilling machines, machining operations can be automated, allowing one worker to safely operate multiple machine tools without feeling too fatigued. is possible,
Productivity can be greatly improved without much equipment cost, and processing accuracy can be made uniform, resulting in improved quality.

Fourth, it does not respond to the linear motion of the motion conversion mechanism at the initial stage of its operation, but responds from the middle of its operation onwards, and applies braking force due to fluid resistance to the motion conversion mechanism using the feed rate control mechanism. Since the structure is such that the feed rate is slow during drilling and fast at other times, it is possible to improve machining efficiency and machining accuracy in this respect as well.

Fourthly, the feed speed control mechanism is configured so that it does not respond to the linear motion of the motion conversion mechanism at the initial stage of operation, but responds from the middle or later stage of operation, and a braking force due to fluid resistance is applied to the motion conversion mechanism by the feed speed control mechanism. Therefore, the feed speed can be slowed down during drilling and fastened at other times, which also improves machining efficiency and accuracy.

[Brief explanation of the drawing]

FIGS. 1A and B are front and side views showing the overall configuration of an embodiment in which the present invention is applied to a drilling machine, and FIGS. 2A, B, and C show the motion conversion mechanism, which is the main part of the present invention, A front view, a cross-sectional view, and a right side view of the drive body including the connecting member, etc., FIG. 3 is a left side view of the connecting member, and FIG. 4 explains how the valve body according to the present invention is attached to the drive body. FIGS. 5A and 5B are cross-sectional views showing two states of the valve body. 17... Attachment mounting base, 11...
Drive body, 20... Stay, 24... Drive shaft, 2
5...Connecting wheel, 26...Cylinder, 30...Valve body, 31...Valve, 33
...Push pin, 37...Hydro checker, 4
0... Piston, 43... Rod, 46... Rack, 47... Pinion.

Claims (1)

[Scope of utility model registration request] In an automatic rotation control device that is attached to a drilling machine and automatically rotates the manual operation handle, the manual operation handle is rotated to send a spindle to which a drill is attached in a predetermined direction to drill a hole in a workpiece. A motion conversion mechanism that generates linear motion in a pressure receiving member by the pressure of fluid supplied from a pressurizing device and converts the linear motion of the pressure receiving member into rotational motion, and a motion conversion mechanism that engages with the manual operation handle provided on an existing drilling machine. a connecting member having a removable engaging portion such as a recessed groove formed therein, and transmitting rotational motion of the motion converting mechanism to the manual operating handle while connected to the manual operating handle with the engaging portion; A valve is inserted in the fluid communication path connecting the fluid pressurizing device and the motion converting mechanism, and by manually moving the valve in one direction, the fluid is directed to the pressure receiving member. the valve is responsive to the motion conversion mechanism when the manually operated handle is rotated by a predetermined amount corresponding to a stroke required for drilling a workpiece with the drill; a fluid control mechanism that is moved in the other direction and controls the fluid so as to stop supplying the fluid to the pressure receiving member and discharge the fluid that was acting on the pressure receiving member; and A feed rate control mechanism that does not respond to the movement at the initial stage of operation but responds from the middle and later stages of operation to apply a braking force to the motion conversion mechanism due to fluid resistance, and a feed rate control mechanism that is installed in the base of the existing drilling machine. The lower end is fixed onto the base with a mounting bolt inserted into the bolt insertion hole, and
An automatic rotation control device for a manual operation handle of a drilling machine, comprising a support member that supports the connection member provided at the upper end in a state in which the connection member is connected to the manual operation handle.