JPH10217055A - Simple inclined circular table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain size reduction and weight reduction in an inclined circular table to be used when a work is fixed in an optional attitude by forming the whole form of the inclined circular table as a hexahedron structure, and rotating and fixing a worktable by locking-releasing of a lock pin and a gear fixed to a shaft of the worktable. SOLUTION: At ordinary time, a disk-shaped worktable 4 arranged so as to project from a surface of a hexahedron body 2 of a simple inclined circular table 1, is fixed by a lock pin 7 to engage with a gear 6 by being energized by a spring 7B. When the worktable 4 is freely rotated, a lever or the like is inserted into an operation knob 12, and is operated in rotation, and the lock pin 7 is fully pulled in the retreat direction, and a stopper pin 13 is pushed in its condition, and its base part is engaged with a base part of the lock pin 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple tilting rotary table, and more particularly to an improvement in a tilting rotary table used when a workpiece is fixed to a machining tool in an arbitrary posture.

[0002]

2. Description of the Related Art When a workpiece is fixed to a machining tool in an arbitrary posture, an inclined circular table is generally used.

[0003] The inclined circular table comprises a table for fixing a work, a support for rotatably supporting the table about a central axis, and a base for rotatably supporting the entire support about a horizontal axis. The base is attached and fixed to the vise, and the work can be fixed in an arbitrary posture by rotation around each axis.

[0004]

Incidentally, the above-mentioned tilted circular table needs to surely support the work to be processed and to support the processing load received by the machining tool from the machining tool. In particular, the cross section is made as thick as possible in order to have the strength of each rotating shaft portion.

[0005] Therefore, there is a problem in that the conventional inclined rotary table is considerably large compared with the work even if it is used for processing a small work, and the weight is increased. Further, for example, since the rotation adjusting device of the work table generally has a structure using a worm gear, the adjusting devices attached to the work table also become large, and these are combined to hinder miniaturization of the tilted circular table. I was

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made to reduce the size and weight of a tilting rotary table used when a workpiece is fixed in an arbitrary posture. Things.

[0007]

According to a first aspect of the present invention, there is provided a simplified tilting circular table, wherein a rigid hexahedron body whose left and right sides can be fixed by a vise, and a rotating shaft which penetrates the front and back surfaces of the hexahedron body. A disk-shaped work table provided on the surface side of the rotating shaft so as to protrude from the hexahedral surface, and a work table bottom member provided on the back side of the rotating shaft so as to be immersed from the back surface of the hexahedral body; A gear coaxially fixed to an intermediate portion of the rotation shaft of the work table,
A lock pin having a fitting tip portion that is supported within the hexahedral body so as to be able to protrude and retract with respect to the gear and that can fit into the tooth valley of the gear without any gap, and a spring that protrudes and biases the lock pin in the gear direction. And an operating member that engages with the side surface of the lock pin and operates to immerse the lock pin against a spring.

That is, the whole form of the inclined circular table has a hexahedral structure, and the rotation and fixing of the work table are performed by engaging and disengaging a lock pin and a gear fixed to a shaft of the work table, thereby reducing the size of the whole. This is to reduce the weight.

According to a second aspect of the present invention, there is provided a simplified inclined circular table, wherein the operation member according to the first aspect has a cam having a projection which is removably engaged with a base of a lock pin, and an operation knob for rotating the cam. And a stopper pin fitted to the lock pin side surface from the side and normally urged by a spring in a direction away from the lock pin side surface.

That is, with this configuration, it is possible to arbitrarily select the rotation and fixing of the work table during the work, and the size and weight can be reduced by simplifying the mechanism.

According to a third aspect of the present invention, there is provided a simplified inclined circular table, comprising: an annular gap between a worktable and a hexahedral body of the simplified inclined circular table;
Annular gap between the worktable bottom member and the hexahedral body,
And O-rings for sealing are respectively inserted in annular gaps between the side surfaces of the stopper pins and the hexahedral body.

That is, this configuration allows the inside of the hexahedron body to be hermetically sealed and to withstand operations in an oil tank such as electric discharge machining. Further, the simplified type inclined circular table according to claim 4 is provided in claim 1, claim 2 or claim 3.
The corner between the bottom surface and the rear side surface of the hexahedral body in the simplified inclined circular table according to the above is formed in an arc shape, and a concave groove parallel to the front side surface is formed inside along the front side surface of the hexahedral body bottom surface, and The corner of the front side edge of the concave groove is formed in an arc shape having the same radius as the arc.

With this configuration, the bottom surface of the hexahedral body has the same shape as the sine bar, so that the inclination of the simple inclined circular table can be regulated accurately. That is, if the arc-shaped corner of the front side surface edge of the concave groove is supported on the upper surface of the support, and the arc-shaped portion on the other side is placed on the base surface, the hexahedral body is inclined according to the height of the support, but at this time, Since the portions in contact with the upper surface of the support base and the base surface are both arcs, the distance between the contacts is constant, and the same function as the sign bar is exhibited.

According to a fifth aspect of the present invention, there is provided a simple inclined rotary table, wherein a ring for a brake drum is provided on an outer periphery of a rotating shaft of the simple inclined rotary table according to the first, second, third or fourth aspect. A hexahedral body at the rear end of the brake shoe is fitted, the brake shoe is guided and supported in the hexahedron body so as to be movable in a radial direction with respect to the brake drum ring, and presses the brake shoe in the brake drum ring direction. It is characterized by being screwed into the inside.

With this configuration, it is possible to limit the free rotation of the work table in which the lock pin is released and the free rotation is enabled, and more specifically, it is possible to prevent the runaway rotation due to the reaction of the workpiece received from the machining tool at the time of machining.

[0016]

Next, an embodiment of the present invention will be described. FIG. 1 is a plan view of a simple inclined circular table according to claim 1, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG.
It is a bottom view seen from a line.

In FIG. 1, a simple inclined circular table 1 is shown.
Is a sturdy hexahedral body 2 whose left and right side surfaces 2A, 2A can be fixed with a vise 10, and two front and back surfaces 2 of the hexahedron body 2.
B, 2B, preferably a thick rotating shaft 3 as shown in the figure, a disk-shaped work table 4 protruding from the hexahedral surface 2B on the surface side of the rotating shaft 3, and the rotating shaft 3 A work table bottom member 5 provided on the back surface side of the work body so as to be immersed from the back surface 2B of the hexahedron body, a gear 6 fixed coaxially to an intermediate portion of a rotation shaft of the work table; A lock pin 7 having a fitting tip 7A which is horizontally supported in the hexahedral body 2 so as to be able to protrude and retract and which can fit into the tooth valley 6A of the gear 6 without any gap.
And a spring 7 for urging the lock pin 7 in the direction of the gear 6.
B, and an operation member 8 that engages with the side surface of the lock pin 7 and operates to retract the lock pin 7 against the spring 7B.

In the above, the shape of the fitting tip 7A of the lock pin 7 is such that it fits into one tooth valley as shown in FIG. 4 (a), and as shown in FIG. 4 (b). Any of two or more fitting teeth may be used.

However, the shape shown in FIG. 4 (b) is preferable from the viewpoint of reducing the stress on the gear since the force is distributed to a plurality of teeth. 9 are bearings, and the rotating shaft 3 and the bearing 2 of the hexahedral body 2 are shown in FIG.
C, the work table 4 and the surface 2B of the hexahedral body 2 are interposed between the work table bottom member 5 and the bottom surface of the hexahedral body 2 so that the work table 4 can rotate smoothly.

The type of bearing can be arbitrarily selected according to the structure such as a thrust bearing and a ball bearing as shown in the figure. Also, the member indicated by reference numeral 7C in the figure is:
5 shows a sealing lid of a mounting hole of the lock pin 7 and is sealed by an O-ring 7D.

In the above, the operating member 8 is a pinion-rack, a locking pin, and a bayonet mechanism in which the fitting tip 7A is positioned along the tooth trace of the gear when protruding. The thing using a lever etc. is applicable.

When the lock pin 7 is retracted from the gear 6 by the operating member 8, the gear 6 is released from the restriction.
The work table 4 can be freely rotated. The rotation of the work table 4 is performed by inserting the operation handle 4B into a fitting hole 4A provided on the side surface of the work table 4 as shown in FIG. 5, and is also fixed by a vise 10 as shown in FIG. A pulley 51 is attached to the worktable bottom member 5 of the simple inclined circular table 1 and a belt 54 is wound between the pulleys 53 of the electric motor 52 to enable continuous high-speed rotation.

On the other hand, if the lock pin 7 is protruded, the tooth tip or the plurality of tooth surfaces of the gear 6 is engaged with the engagement tip 7A, and the rotation of the work table 4 is restricted. At this time, the tip of the lock pin 7 is in a shape in which the tip of the lock pin 7 is in contact with the tooth valley portion 6B of the gear 6 without any gap. It is fixed securely without any.

Particularly, when the shaft 3 is a thick shaft and the gear 6 is a large diameter as shown in the illustrated example, the shaft 3 is almost completely fixed. Next, an embodiment of the simple type inclined circular table according to the second aspect will be described.

1 and 2, the operating member 8 has a projection 11A which is engaged with the base 7E of the lock pin 7 so as to be detachable.
A cam 11 rotatably supported around an axis perpendicular to B,
An operation knob 12 for rotating the cam 11 and a side direction on the side surface of the lock pin 7 (in the illustrated example, the surface 2B side of the body 2).
And a stopper pin 13 normally biased by a spring 13A in a direction away from the side surface of the lock pin 7.

The above-described fitting structure of the lock pin 7 and the stopper pin 13 is such that the base 13B of the stopper pin 13 pressed down against the spring 13A is fitted to the base 7E of the lock pin 7. The base 7E of this portion is formed as a reverse inclined surface as shown in the figure.

Normally, the work table 4 is fixed by the lock pin 7 which is urged by the spring 7B and is engaged with the gear 6, but when the work table 4 is freely rotated, the operation knob 12 is operated as shown in FIG. Then, the lock pin 7 is fully pulled in the immersion direction by rotating the lever 12A and the like, and in this state, the stopper pin 13 is pushed in so that the base 13B is engaged with the base 7E of the lock pin 7 as shown in FIG.

If the lever 12A is returned while the stopper pin 13 is being pushed in, the lock pin 7 is pushed back by the elasticity of the spring 7B, so that the base 7E and the base 13B are fitted with the reverse inclined surfaces. The stopper pin 13 does not come off the lock pin 7 unless it is pulled back fully in the immersion direction.

Therefore, it is possible to maintain the free rotation state. Next, an embodiment of the simple type inclined circular table according to claim 3 will be described. In FIG. 2, an annular gap 14A between the worktable 4 and the hexahedral body 2, and an annular gap 1 between the worktable bottom member 5 and the hexahedral body.
4B and O-rings 15 for sealing are respectively provided in annular gaps 14C between the side surfaces of the stopper pins 13 and the hexahedral body 2.
Is interposed.

Therefore, the inside of the hexahedron body 2 is sealed by the O-rings 15 in a watertight manner. For example, the inside of the hexahedron body 2 is protected even in an environment such as an operation in an oil tank such as electric discharge machining of a simple inclined circular table. Therefore, it can be used safely.

Next, an embodiment of the simple inclined circular table according to claim 4 will be described. As shown in FIG. 2, the corner 16 between the bottom surface 2B and the rear side surface 2D of the hexahedral body 2 is formed in an arc shape, and a concave groove 17 parallel to the front side surface is formed inside the hexahedral body bottom surface 2B along the front side surface. The corner 17A of the front side edge of the concave groove 17 is formed in an arc shape having the same radius as the arc.

Therefore, as shown in FIG.
If the support base 18 is placed on the base 7A, the simple inclined circular table can be adjusted to an arbitrary inclined posture according to its height. The tilt angle can be calculated from the correlation between the height of the support and the length of the body 2. If the support 18 having a predetermined height is prepared, the tilt angle can be easily adjusted within the range. .

Further, the contact surface with the support base 18 and the base surface 19
Since the contact surfaces with each other are arc-shaped, the bottom surface of the hexahedral body 2 performs the same function as the sine bar, and extremely accurate tilt adjustment can be performed.

Next, a description will be given of an embodiment of a simple inclined circular table according to the present invention. 1 and 2, a brake drum ring 20 is fitted around the outer periphery of the rotating shaft 3 by a tight fit or a key (in the illustrated example, a tight fit is shown). A brake shoe 21 made of a reinforced hard rubber or the like is slidably guided in the hexahedron body 2 so as to be able to move in the radial direction, and an adjusting screw 22 that presses the brake shoe 21 in the direction of the perspective movement is screwed into the hexahedron body 2. Have been combined.

In the drawing, reference numeral 23 denotes a cover nut for sealing the adjusting screw 22, which is sealed by O-rings 24, 24, for example, to place a simple inclined circular table in a working environment in an oil tank such as the aforementioned electric discharge machining. This is useful in such cases.

In the above, when the adjusting screw 22 is tightened, the brake shoe 21 is pressed against the outer periphery of the brake drum ring 20, and the rotation is restricted by the pressing force. Therefore, when the work is processed while the lock pin 7 is released and the work table 4 is operated by the handle, the rotational force acts in reverse on the work from the machining tool, and the operation handle 4 is operated.
This is effective as a safety measure against runaway rotation when the rotation of the worktable 4 cannot be supported by only the support of B.

[0037]

As described above, according to the first aspect of the present invention, the rotation of the work table is fixed by the gear and the lock pin. Therefore, the adjustment of the rotation angle is limited by the number of teeth of the gear. Since the structure is much simpler than that using the worm gear and the supporting force is excellent, the inclined rotary table can be made significantly smaller and lighter than the conventional one.

Further, even if the rotation angle is adjusted, the number of gear teeth can be adjusted to 15 ° when the number of gear teeth is 24, and to 10 ° when the number of gear teeth is 36. Depending on the combination with the attitude of the machining tool, it is practically possible. Adjustment is possible to the extent that there is almost no problem.

According to the second aspect of the present invention, in addition to the above effects, after selecting either the free rotation state or the fixed state of the work table, the work table is switched between rotation and stop unless the operation lever is operated. Therefore, the operation can be safely continued, and the simple structure has the effect of contributing to the reduction in size and weight of the apparatus.

According to the third aspect of the present invention, in addition to the above-described effects, the inside of the body is kept airtight, so that it can be used for operations in an oil tank such as electric discharge machining. According to the fourth aspect of the present invention, in addition to the above-described effects, the simple inclined circular table itself can be inclined and fixed with the same accuracy as that of the sine bar.

According to the fifth aspect of the present invention, in addition to the above effects, the work table after the lock pin is released can be prevented from running out of control by the action force applied from the machining tool, so that it is safe. Have.

[Brief description of the drawings]

FIG. 1 is a plan view of a simple inclined circular table according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a bottom view taken along line YY of FIG. 1;

FIG. 4 is a plan view of the lock pin of the present invention.

FIG. 5 is a plan view of a simple inclined circular table according to the present invention.

FIG. 6 is an enlarged sectional view of a lock pin and a stopper pin.

FIG. 7 is an explanatory diagram of a use state of the inclined circular table.

FIG. 8 is an explanatory diagram of a use state of the inclined circular table.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Simple inclined circular table 2 ... Hexahedral body 2A ... Left and right side surface 2B ... Front and back two surfaces of a hexahedral body 2C ... Bearing of a hexahedral body 3 ... Rotating shaft 4 ... Disk-shaped worktable 5 ... Worktable bottom member 6 ... Gear 6A ... Tooth valley 7 ... Lock pin 7A ... Fitting tip 7B ... Spring 7C ... Sealing lid of mounting hole 7D ... O-ring 7E ... Lock pin base 8 ... Operating member 9 ... Bearing 10 ... Vise 11A ... Engagement projection 11 ... Cam 12 ... Operation knob 13A ... Spring 13 ... Stopper pin 13B ... Base of stopper pin 13 14A ... Circular gap between work table and hexahedral body 14B ... Circular gap between work table bottom member and hexahedron body 14C ... Stopper pin An annular gap between the side surface and the hexahedral body 15 ... O-ring for sealing 16 ... Bottom and rear sides of the hexahedral body Corners 17 ... recessed groove 17A ... front edge corners 18 ... supporting base 19 ... base surface 20 ... lid nut 24 ... O-ring for sealing the brake drum ring 21 ... brake shoe 22 ... adjustment screw 23 ... adjustment screw of the

Claims (5)

[Claims] 1. A rigid hexahedron body whose left and right sides can be fixed by a vise, a rotating shaft penetrating the front and back surfaces of the hexahedral body, and a disk-shaped member provided on the surface of the rotating shaft so as to protrude from the surface of the hexahedron. A work table, a work table bottom member provided on the back surface side of the rotation shaft so as to be immersed from the back surface of the hexahedral body, a gear coaxially fixed to an intermediate portion of the rotation shaft of the work table, A lock pin having a fitting tip portion which is supported within the hexahedral body so as to be able to protrude and retract with respect to the gear, and which can be fitted into the tooth valley of the gear without a gap; and a spring which biases the lock pin in a gear direction. An operation member for engaging the lock pin side surface and immersing the lock pin against a spring. 2. An operation member having a cam having a projection which is removably engaged with a base of a lock pin, an operation knob for rotating the cam, and a side face fitted on the lock pin side face,
2. The simple inclined circular table according to claim 1, wherein the table comprises a stopper pin normally urged by a spring in a direction away from a side surface of the lock pin. 3. An O-ring for sealing is interposed in the annular gap between the worktable and the hexahedral body, the annular gap between the worktable bottom member and the hexahedral body, and the annular gap between the stopper pin side surface and the hexahedral body. 3. The simple inclined circular table according to claim 1, wherein the inclined table is inserted. 4. A hexahedral body, wherein the corner between the bottom surface and the rear side surface has an arc shape, and a concave groove parallel to the front side surface is formed inside the hexahedral body bottom surface along the front side surface. 4. The simple inclined circular table according to claim 1, wherein a corner of a front side edge is formed in an arc shape having the same radius as the arc. 5. A brake drum ring is fitted around the outer periphery of a rotating shaft, and a brake shoe is guided and supported in a hexahedron body so as to be movable in a radial direction with respect to the brake drum ring. 5. The simple inclined circular table according to claim 1, wherein an adjusting screw for pressing the screw is screwed into a hexahedral body at a rear end of the brake shoe. 6. .