JP7167964B2 - cover device - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a cover device for a rotary processing machine that rotates an object to be cut or a cutting tool to machine an object to be cut.

For example, in a rotary machine such as a boring machine that performs cutting by rotating a cutting tool, parts are machined by rotating the cutting tool in an exposed state.

In addition, even in a rotary machine that rotates a work to be cut, such as a lathe, the rotating work to be cut is exposed.

In general, a rotary processing machine does not have a cover for covering a rotating body such as a cutting tool or a workpiece, and even if there is a cover, it is of a flip-up type or a rotary sliding type.

Japanese Patent No. 3153369 Japanese Utility Model Laid-Open No. 49-069894

By the way, for safety, it is preferable to have a cover that covers the rotating body.

However, when a flip-up type cover is provided around the rotating body, it is difficult to lift the cover when replacing the cutting tool. In addition, it is impossible to change the range of covering the rotating body according to the work and the cutting tool, which may impair the workability.

Accordingly, the present disclosure was created in view of such circumstances, and an object thereof is to provide a cover device capable of improving workability.

According to one aspect of the present disclosure, a base provided in a processing machine main body of a rotary processing machine having a rotating portion that rotates around an axis extending in the front-rear direction;
a first cover that is provided on the base via a connecting portion and covers the rotating portion;
a second cover slidably provided in the front-rear direction on the first cover via an axial slide mechanism;
The cover device is provided, wherein the connecting portion supports the first cover so as to be expandable radially outward of the rotating portion.

Preferably, the base includes a fixed base provided in the rotary processing machine, and a rotary base slidably provided in the fixed base in a circumferential direction of a circle centered on the axis,
The first cover is provided on the rotary base through the connecting portion.

Preferably, the rotary base includes a circumferential shielding position in which the first cover is positioned above and to the left of the shaft in the circumferential direction, and a position of the first cover in the circumferential direction is to the lower and right sides of the shaft. is slidably supported between a circumferential open position and
The fixed base is formed with a circumferential shielding stopper that locks the rotary base at the circumferential shielding position, and a circumferential opening stopper that locks the rotary base at the circumferential open position. be done.

Preferably, at least one of the first cover and the second cover is formed in a fence shape extending in the front-rear direction and extending in the circumferential direction of a circle centered on the axis.

Preferably, the connecting portion supports the first cover so as to be expandable upward.

According to the above aspect, it is possible to suppress the possibility of impairing the workability.

1 is a perspective view of a cover device according to an embodiment of the present disclosure; FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 3 is a cross-sectional view taken along line BB of FIG. 2; 4 is a cross-sectional view taken along line CC of FIG. 3; FIG. It is a perspective view of the cover apparatus which shortened the cover. FIG. 6 is a cross-sectional view taken along line DD of FIG. 5; FIG. 4 is a perspective view of a cover device in which a cover is rotated around a rotating body; FIG. 8 is a cross-sectional view taken along line EE in FIG. 7; FIG. 4 is a perspective view of the cover device with the cover flipped upward; FIG. 10 is a cross-sectional view taken along line FF of FIG. 9;

Embodiments of the present disclosure will be described below with reference to the accompanying drawings. It should be noted that the front, back, left, right, up and down directions in the embodiments described later are based on the front end direction of the rotating portion of the rotary processing machine. However, each direction in this embodiment is used for convenience of explanation, and represents relative positional relationships between members described later.

FIG. 1 is a perspective view of a cover device 2 attached to a rotary processing machine 1. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1. FIG. First, the rotary processing machine 1 to which the cover device 2 is applied will be described.

As shown in FIG. 1, the rotary processing machine 1 is composed of, for example, a horizontal jig boring machine. The rotary machine 1 includes a table 4 on which an object 3 to be cut is placed, and a machine body 5 for cutting the object 3 on the table 4 . The table 4 is provided on a bed (not shown) so as to be slidable in the front, rear, left, and right directions. The processing machine body 5 includes a fixed body portion 6 fixed to a floor (not shown), a movable body portion 7 provided on the fixed body portion 6 so as to be movable in the front-rear direction, and an axis C extending in the front-rear direction on the movable body portion 7. and a rotating part 8 rotatably provided in the body.

The rotating portion 8 is formed by extending forward from the front end of a main body shaft portion 7 a formed in the movable main body portion 7 so as to extend forward. A cutting tool 9 is detachably held by the rotating portion 8 . The types of cutting tools 9 that can be attached to and detached from the rotating part 8 are boring tools, end mills, face mills, drills, and the like. The cutting tool 9 is appropriately selected according to the type of processing performed by the rotary processing machine 1 . Further, the main body shaft portion 7a is formed coaxially with the axis C and has a circular cross section. The standing position of the operator with respect to the rotary processing machine 1 according to the present embodiment is formed to the left of the rotating section 8 . That is, the worker performs the work while standing on the left side of the rotating part 8 .

Note that the rotary processing machine 1 is not limited to the one described above. The rotary processing machine 1 may be one having a rotating part 8 that rotates around an axis C extending in the front-rear direction, and may be a lathe or the like, for example. In this case, the rotating part 8 grips the workpiece.

By the way, for safety, it is preferable that there is a cover that covers the rotating part 8 and the cutting tool 9 .

However, if a cover (not shown) is provided around the rotating part 8 and the cutting tool 9, the work of lifting the cover when replacing the cutting tool 9 is difficult. In addition, it is impossible to change the range of covering the rotating part 8 and the cutting tool 9 according to the work and the cutting tool, which may impair the workability.

Therefore, in the present embodiment, the rotary processing machine 1 is provided with a cover device 2 which will be described later. Thereby, workability can be improved. The cover device 2 will be explained.

The cover device 2 includes a base portion 10 detachably provided on the main body shaft portion 7a, a first cover 12 provided on the base portion 10 via a connection portion 11, and an axial slide mechanism 13 provided on the first cover 12. A second cover 14 is provided.

As shown in FIGS. 2 and 3, the base portion 10 includes a fixed base portion 15 provided on the main body shaft portion 7a, and a rotary base portion 16 provided on the fixed base portion 15 so as to be slidable in the circumferential direction of a circle centered on the axis C. Prepare.

The fixed base portion 15 is formed in an annular shape and is coaxially fixed to the outer circumference of the main body shaft portion 7a. The fixed base 15 also includes an inner peripheral portion 17 and an outer peripheral portion 18 . The outer peripheral portion 18 is formed in a plate shape with a uniform thickness, and is thinner than the inner peripheral portion 17 in the front-rear direction. An outer peripheral surface 17b of the inner peripheral portion 17 is formed between the front surface 17a of the inner peripheral portion 17 and the front surface 18a of the outer peripheral portion 18 . An outer peripheral surface 17 b of the inner peripheral portion 17 is formed to be perpendicular to the front surface 17 a of the inner peripheral portion 17 and the front surface 18 a of the outer peripheral portion 18 . A slit 19 for guiding the rotary base 16 is formed in the outer peripheral portion 18 . The slit 19 is formed in an arcuate shape coaxial with the fixed base 15 . That is, the slit 19 extends in the circumferential direction of a circle centered on the axis C. As shown in FIG.

The rotary base 16 is formed in an arcuate shape coaxial with the fixed base 15 and has a rectangular cross section. The radius Ri1 of the inner peripheral surface of the rotary base 16 is set slightly larger than the radius Ri2 of the outer peripheral surface 17b of the inner peripheral portion 17, and the radius Ro1 of the outer peripheral surface of the rotary base 16 is substantially the same as the radius Ro2 of the outer peripheral portion 18. set. As shown in FIGS. 3 and 4, the rotary base 16 has a plurality of (three in this embodiment) guide pins 20 rotatably guided by the slits 19 along the circumferential direction. be provided. In addition, although the rotary base 16 shall be formed in circular arc shape, it is not restricted to this. For example, the rotary base 16 may be formed in an annular shape coaxial with the fixed base 15 .

The guide pin 20 includes a pin shaft portion 21 inserted through the slit 19 and a pin head portion 22 integrally provided at the rear end of the pin shaft portion 21 . As shown in FIGS. 3 and 8 , the pin shaft 21 guides the movement of the rotary base 16 by moving along the slit 19 . Further, the pin shaft portion 21 restricts the movement range of the rotary base portion 16 by coming into contact with the end of the slit 19 in the extending direction. Thereby, the rotary base 16 is stopped at a predetermined position. Specifically, the predetermined positions are the circumferential shielding position (see FIGS. 1 and 3) where the first cover 12 is located above and to the left of the axis C in the circumferential direction, and the first cover 12 in the circumferential direction. Position 12 is the open circumferential position below and to the right of axis C (see FIGS. 7 and 8). That is, one end of the slit 19 is provided with a circumferential shielding stopper 23 for stopping the rotary base 16 at the circumferential shielding position, and the other end of the slit 19 is formed with a circumferential shielding stopper 23 for stopping the rotary base 16 at the circumferentially open position. A direction opening stopper 24 is formed.

Further, as shown in FIG. 4, a bearing 25 is provided at the front end portion of the pin shaft portion 21 . The bearing 25 is composed of a radial bearing. The bearing 25 includes an inner ring 26 fixed to the outer periphery of the pin shaft portion 21, an outer ring 27 arranged on the outer periphery of the inner ring 26, and a plurality of balls 28 provided between the inner ring 26 and the outer ring 27. Prepare. An outer peripheral surface 27 a of the outer ring 27 abuts against an outer peripheral surface 17 b of the inner peripheral portion 17 . Accordingly, when the pin shaft portion 21 is moved along the slit 19, the bearing 25 runs along the outer peripheral surface 17b of the inner peripheral portion 17. As shown in FIG. Thereby, the rotary base 16 is smoothly slid with respect to the fixed base 15 .

The pin head portion 22 is formed in a disc shape having a diameter larger than that of the pin shaft portion 21 and is brought into contact with the rear end surface 18b of the outer peripheral portion 18 . The pin head 22 functions as a retainer by coming into contact with the rear end face 18b. This restricts the forward movement of the rotary base 16 with respect to the fixed base 15 .

As shown in FIGS. 1 and 2, the first cover 12 is for covering the rotating part 8 and the cutting tool 9 gripped by the rotating part 8, and extends forward (axially) from the rotary base 16, It is formed in the shape of a fence extending in the circumferential direction of a circle centered on the axis C. As shown in FIG. Specifically, the first cover 12 includes a plurality of rod members 12a extending in parallel in the axial direction, a base end side support frame 12b provided to extend between the base ends of these rod members 12a, and distal ends of the rod members 12a. and a leading end side support frame 12c that is provided so as to bridge between them. The proximal side support frame 12b and the distal side support frame 12c are formed in an arc shape and a rectangular cross section. The inner and outer diameters of the proximal side support frame 12 b and the distal side support frame 12 c are set to be substantially the same as those of the rotary base 16 . Further, the length L1 of the first cover 12 in the front-rear direction is set to be shorter than the cutting tool 9 having the shortest axial length among the cutting tools 9 that can be gripped by the rotating part 8 . This can prevent the first cover 12 from becoming an obstacle when the cutting tool 9 mills the front workpiece 3 .

Moreover, the connecting portion 11 is configured by a hinge with a brake (torque hinge). As shown in FIGS. 9 and 10 , the connecting portion 11 supports the first cover 12 so that it can be deployed radially outward of the rotating portion 8 . Specifically, the connection portion 11 supports the first cover 12 so that it can be flipped up (developed upward) when the rotary base portion 16 is at the circumferential shielding position. Also, the connecting portion 11 is configured to hold the first cover 12 in a specific posture. Here, the specific posture means a shielding posture (see FIG. 1) in which the heights of the tip and base ends of the first cover 12 are approximately the same, and an open posture in which the tip of the first cover 12 is above and behind the base end. posture (see FIG. 9). That is, the first cover 12 can be switched between the shielding posture and the open posture when the rotary base 16 is at the circumferential shielding position. The open posture may be a posture in which the tip of the first cover 12 is vertically above the base end.

Further, the first cover 12 is locked against rotation about the connecting portion 11 by a lock mechanism 29 provided at one circumferential end of the rotary base portion 16 . As shown in FIG. 3, the lock mechanism 29 includes a lock base portion 30 extending forward at one end of the rotary base portion 16 in the circumferential direction, and a lock pin provided through the lock base portion 30 in the circumferential direction of the rotary base portion 16 . 31, a spring (not shown) that is provided on the lock base 30 and elastically supports the lock pin 31 in a protruded state toward the proximal side support frame 12b, and a lock pin 31 that is formed on the proximal side support frame 12b and is inserted. and a pin hole 32 for When the lock pin 31 is inserted into the pin hole 32, the first cover 12 is locked in the shielding posture (see FIG. 1). are allowed to change their posture.

As shown in FIGS. 1 and 2 , the second cover 14 is for covering the cutting tool 9 gripped by the rotating part 8 and is arranged radially outward of the first cover 12 . The second cover 14 is formed in a fence shape extending forward (in the axial direction) and extending in the circumferential direction of a circle centered on the axis C. As shown in FIG. Specifically, the second cover 14 includes a plurality of rod members 14a extending in parallel in the axial direction, a base-side support frame 14b provided to extend between the base ends of these rod members 14a, and distal ends of the rod members 14a. It is provided with a leading end side support frame 14c provided to span between the bar members 14a and an intermediate support frame 14d provided to span between the intermediate portions of the rod members 14a. The proximal side support frame 14b, the distal side support frame 14c, and the intermediate support frame 14d are formed in an arc shape and have a rectangular cross section. The radius r2 of the inner peripheral surfaces of the proximal side support frame 14b, the distal side support frame 14c, and the intermediate support frame 14d is set to be substantially the same as the radius r1 of the outer peripheral surface of the first cover 12. As shown in FIG. In addition, the length L2 of the second cover 14 in the front-rear direction is set substantially equal to the length L1 of the first cover 12 in the front-rear direction.

Further, the axial slide mechanism 13 includes a rail 33 that spans between the base end side support frame 12b and the tip end side support frame 12c of the first cover 12, and a rail 33 that is provided on the base end side of the second cover 14. and a slider 34 running along. A pair of rails 33 are provided on the first cover 12 so as to be spaced apart in the circumferential direction thereof. The rail 33 has a C-shaped cross section and includes a slit 33a into which the slider 34 is fitted. The sliders 34 are provided across the base end side support frame 14b and the intermediate support frame 14d of the second cover 14, and are arranged at positions corresponding to the respective rails 33 in the circumferential direction of the second cover 14. . After the slider 34 is fitted into the rail 33, it is engaged with the rail 33 so as not to come off. Also, the slider 34 is slidably pressed against the inner surface of the rail 33 . Thus, the slider 34 travels along the rail 33 when receiving the force F along the rail 33, and is locked by the frictional force received from the inner surface of the rail 33 when the force F is no longer received. That is, the slider 34 is configured to be able to travel along the rail 33 and be lockable at any position on the rail 33 . Note that the slider 34 is not limited to this. For example, the slider 34 may be provided with a locking mechanism that can be freely engaged with and disengaged from the rail 33 .

Next, the operation of this embodiment will be described.

When milling the workpiece 3 placed on the table 4 with the cutting tool 9 gripped by the rotating part 8, the rotary base 16 is positioned at the shielding position in the circumferential direction as shown in FIGS. , the first cover 12 is placed in the shielding posture. After that, the position of the second cover 14 in the front-rear direction is adjusted so that the front end of the second cover 14 is positioned behind the front end of the cutting tool 9 . The axial slide mechanism 13 supports the second cover 14 so as to be slidable in the front-rear direction and lockably at any position. Therefore, the length of the cover composed of the first cover 12 and the second cover 14 can be freely adjusted according to the length of the cutting tool 9 in the front-rear direction and the size of the workpiece 3 in the front-rear direction. For example, when the length of the cutting tool 9 in the front-rear direction is short, the second cover 2 is slid rearward as shown in FIGS. This allows the tip of the cutting tool 9 to protrude forward from the front end of the second cover 14 .

After that, the movable body portion 7 is moved forward while rotating the rotating portion 8 . Milling is started when the cutting tool 9 hits the workpiece 3 to be cut. At this time, the upper and left sides of the rotating part 8 and the cutting tool 9 are covered with the first cover 12 and the second cover 14 . Therefore, the operator is prevented or suppressed from accidentally touching the rotating part 8 or the cutting tool 9 . In addition, since the first cover 12 and the second cover 14 are formed in the shape of a fence, for example, the first cover 12 and the second cover 14 are made of transparent resin. The surroundings of the cutting tool 9 will not be lost due to being damaged by fragments. Therefore, the first cover 12 and the second cover 14 can maintain good visibility over a long period of time.

As shown in FIGS. 7 and 8, when replacing the cutting tool 9 with a large or heavy one, the rotary base 16 is rotated rightward while the lock pin 31 is inserted into the pin hole 32 . At this time, the pin shaft portion 21 of the guide pin 20 is guided along the slit 19 and the bearing 25 runs along the outer peripheral surface 17 b of the inner peripheral portion 17 . Therefore, the rotary base 16 is smoothly rotated. When the pin shaft portion 21 of the guide pin 20 comes into contact with the circumferential opening stopper 24, the rotary base portion 16 is stopped at the circumferential opening position. As a result, the upper and left sides of the rotating portion 8 can be opened widely. And even if the cutting tool 9 is large, it can be easily replaced. In addition, even if the cutting tool 9 is heavy and needs to be replaced using a crane (not shown), the first cover 12 and the second cover 14 can be prevented from interfering with the slinging work, and the crane can be used. Interference with wires and the like can be suppressed.

As shown in FIGS. 9 and 10, when the cutting tool 9 is manually replaced, the second cover 14 is slid rearward from the state shown in FIGS. The first cover 12 is flipped up around 11 (rotated upward). At this time, since the second cover 14 is slid rearward, the maximum height H1 of the cover formed by the first cover 12 and the second cover 14 can be suppressed while the cover is being flipped up. Height H2 can be suppressed. As a result, the force required for flipping up the cover can be reduced. Then, the first cover 12 is opened by a simple operation, and the upper and left sides of the rotating portion 8 are opened. As a result, the cutting tool 9 can be easily removed from the rotating part 8 and a new cutting tool 9 can be easily attached to the rotating part 8 .

As described above, the cover device 2 in the present embodiment includes the first cover 12 provided on the base portion 10 via the connecting portion 11, and the first cover 12 slidable in the axial direction via the axial slide mechanism 13. and a second cover 14 provided. The connecting portion 11 supports the first cover 12 so that it can be deployed radially outward of the rotating portion 8 . Therefore, during machining, the longitudinal position of the second cover 14 can be adjusted according to the longitudinal length of the cutting tool 9 and the longitudinal size of the workpiece 3 to be cut, and the first cover 12 can be opened during tool replacement. Posture can be done. Therefore, it is possible to suppress the possibility that the cover device 2 impairs the workability of the cutting work and the tool changing work.

Although the embodiments of the present disclosure have been described above in detail, the present disclosure is also capable of other embodiments as follows.

(1) The base 10 is provided with the fixed base 15 and the rotary base 16, but the rotary base 16 may be omitted if necessary. In this case, the first cover 12 is preferably provided on the fixed base 15 via the connecting portion 11 .

(2) Although the fixed base 15 is formed in an annular shape and provided on the main body shaft portion 7a, it is not limited to this. The fixed base 15 may be provided on the main body (movable main body 7 in the present embodiment) that supports the rotating part 8, and may be formed in another shape such as a U shape, for example.

(3) Although the first cover 12 covers the rotating part 8 and the cutting tool 9, it is not limited to this. The first cover 12 may cover only the rotating portion 8 . In this case, it is preferable to cover the cutting tool 9 with the second cover 14 .

(4) Although the first cover 12 and the second cover 14 are formed in the shape of a fence, they are not limited to this. If the first cover 12 and the second cover 14 are not oiled or scratched, the first cover 12 and the second cover 14 may be made of transparent resin or the like. Also, if necessary, only one of the first cover 12 and the second cover 14 may be formed in a fence shape, and the other may be formed of a transparent resin or the like.

(5) Although the first cover 12 and the second cover 14 extend in the circumferential direction of the circle centered on the axis C, the present invention is not limited to this. For example, the first cover 12 and the second cover 14 may be L-shaped when viewed from the front.

(6) The second cover 14 is arranged radially outward of the first cover 12 , but may be arranged radially inward of the first cover 12 .

(7) Although the connection portion 11 is configured to hold the first cover 12 in a specific posture, the configuration is not limited to this. The connecting portion 11 may be configured to hold the first cover 12 in any posture, or may be configured by a hinge that does not have a braking function.

(8) Although the circumferential shielding stopper 23 is formed at one end of the slit 19 and the circumferential opening stopper 24 is formed at the other end of the slit 19, the present invention is not limited to this. The circumferential shielding stopper 23 and the circumferential opening stopper 24 may be separately formed on the outer peripheral portion 18 . For example, the circumferential direction shielding stopper 23 and the circumferential direction opening stopper 24 may be configured by projections projecting forward from the front surface 18 a of the outer peripheral portion 18 .

(9) The rotary processing machine 1 may be composed of other types of horizontal processing machines such as a horizontal milling machine and a horizontal drilling machine. Further, the rotating part 8 may be one that grips the workpiece.

Reference Signs List 1 Rotary processing machine 2 Cover device 5 Processing machine body 8 Rotating part 10 Base part 11 Connecting part 12 First cover 13 Axial slide mechanism 14 Second cover C Axis

Claims (4)

a base provided in a processing machine main body of a rotary processing machine having a rotating portion that rotates around an axis extending in the front-rear direction;
a first cover that is provided on the base via a connecting portion and covers the rotating portion;
a second cover slidably provided in the front-rear direction on the first cover via an axial slide mechanism;
the connecting portion supports the first cover so as to be expandable radially outward of the rotating portion ;
The base includes a fixed base provided in the rotary processing machine, and a rotary base slidably provided in the fixed base in a circumferential direction of a circle centered on the axis,
The first cover is provided on the rotary base via the connecting portion
A cover device characterized by: The rotary base has a circumferential blocking position where the first cover is located above and to the left of the shaft in the circumferential direction, and a circumferential shielding position where the first cover is located below and to the right of the shaft in the circumferential direction. slidably supported between a directional open position and
The fixed base is formed with a circumferential shielding stopper that locks the rotary base at the circumferential shielding position, and a circumferential opening stopper that locks the rotary base at the circumferential open position. The cover device according to claim 1 , wherein the covering device is made of a material. 3. The cover device according to claim 1 , wherein at least one of said first cover and said second cover is formed in a rail-like shape extending in the front-rear direction and in the circumferential direction of a circle centered on said axis. The cover device according to any one of claims 1 to 3 , wherein the connecting portion supports the first cover so as to be expandable upward.

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