JPH0314278Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a scraper device for removing chips from a machine tool.

[Conventional technology]

Conventionally, in order to eliminate chips generated during cutting with machine tools, for example, in a column traveling type machining center that moves on two sliding surfaces on the bed, the chips accumulated between the sliding surfaces are removed from the column. A scraper device is known that utilizes movement to remove the column from the machine using a scraper installed on the bottom surface of the column.
has already been taken.

[The problem that the idea aims to solve]

The above-mentioned conventional scraper device had a problem in that when the column returned, remaining chips that could not be removed by the scraper returned again and could not be completely removed.

The purpose of the present invention has been proposed in view of the above circumstances and to solve the problem, and is to provide a scraper device that can completely and efficiently remove chips and improve work efficiency.

[Means to solve the problem]

The present invention takes the following measures to solve the above problems. That is, a base having a guide portion, a movable body provided to be able to reciprocate on the base, and a movable body provided on the movable body and extending in a direction perpendicular to the direction of movement of the movable body and rotatable. a shaft body supported and movable with respect to the movable body; a rotating body rotatably supported by the shaft body and constantly rotating in contact with a guide portion of the base; the rotating body and the shaft; a frictional force transmitting member that is provided between the shaft body and the rotating body and applies frictional force to temporarily integrate the shaft body and the rotary body; and one end is fixed to the shaft body and the other end is capable of contacting the deposit accumulation surface. and a scraper that swings with the axis of the shaft as a fulcrum, and when the movable body is moved in one direction by rotating the shaft by frictional force as the rotating body rotates, the scraper The scraper is forcibly brought into contact with the deposit accumulation surface, and when moved to the other side, the deposit deposition surface and the scraper are forcibly separated.

[Effect]

The scraper device of the present invention forcibly contacts the bed with the column's forward sliding movement, and moves in the same direction as the column to carry chips accumulated on the deposited surface and remove them from pits. to remove the chips from the machine. During the backward sliding movement of the column, a device for generating frictional force swings the scraper due to the frictional force with the bed surface to lift it out of contact with the bed and prevent chips from being carried away.

〔Example〕

Embodiments of the present invention will be described in detail based on the drawings.

Figure 1 is a front sectional view of the bed and lower surface of the column of a column traveling type machining center, Figure 2
The figure is a sectional view taken along arrow A in FIG.

In FIGS. 1 and 2, two sliding surfaces 2 are placed on a bed 1, which is a base, in the Z-axis direction,
A column 3, which is a movable body, slides back and forth on the sliding surface 2.

As shown in FIG. 2, the column 3 is reciprocated in the Z-axis direction (back and forth in FIG. 1) by a drive motor 4 via a drive shaft 5 and a threaded screw 6 fitted to the drive shaft.

The scraper 7 of the present invention is arranged between the bed 1 and the lower surface 3a of the column 3, one end of the scraper 7 is attached to the lower surface 3a of the column 3, and the other end, that is, the lower part of the scraper 7 is placed on the bed 1. are in contact.

As the column 3 moves in the Z-axis direction, the scraper 7 slides back and forth in the Z-axis direction while contacting the bed 1, and scrapes chips 8 accumulated in the space 10 into a pit 9 provided in a part of the bed 1. drop The chips 8 dropped into the pit 9 are placed on a chip conveyor (not shown) and removed from the machine.

The conventional scraper device simply attaches one end of the scraper to the lower surface 3a of the column 3, and as the column 3 moves in the Z-axis direction, the scraper 7 slides back and forth while the other end of the scraper contacts the bed 1. Therefore, the accumulated chips are removed on the outward pass of the scraper 7, but on the return pass, the chips that could not be removed on the outward pass are brought back, so they cannot be completely removed.

In the scraper device of the present invention, the scraper 7 is forcibly brought into contact with the bed 1 during the outward journey, but during the return journey, the scraper 7 is lifted by the frictional force with the surface of the bed 1 and scraped onto the surface of the bed 1. This is a scraper device that is equipped with a device that generates a frictional force that separates the chips from the metal to completely remove the chips.

An embodiment of the concrete structure of the scraper device of the present invention will be described with reference to FIG.

A in Figure 3 shows the bottom part 3 of the bed 1 and column 3.
A is a front cross-sectional view of the scraper device of the present invention installed between A, B in FIG. 3 is a B-B cross-sectional view in FIG.
C in FIG. 3 is a sectional view taken along the line CC in FIG. 3A.

In FIG. 3, a rail 11 serving as a guide portion extends on the left side of the bed 1. A box-shaped bracket 1 is attached to one end of the lower surface 3a of the column 3.
2 is screwed onto the lower surface portion 3a of the column 3 with a bolt 13. The box-shaped bracket 12 also serves as a cover. The box-shaped bracket 12
Inside, a shaft 14, which is a shaft body, extends in a direction perpendicular to the column movement direction, and a flange 15 is formed and integrated with the shaft 14. Further, a roller 17, which is a rotating body, is rotatably inserted into the shaft 14 via a disk spring 16, which is a frictional force transmitting member, and screwed into the shaft 14 with the nut 18 compressing the disk spring. It is integrated into the shaft 14. The rollers 17 are placed in contact with the rails 11. One end of the U-shaped leaf spring 19 is screwed onto the lower surface 3a of the column 3 via the bracket 12 with a bolt 20, and the other end is inserted inside the shaft 14 and serves to press the roller 17 downward. ing.

A bracket 21 is screwed onto the other end of the lower surface portion 3a of the column 3 with a bolt 22. The shaft 14 is inserted into and held in an inverted U-shaped groove 21a at the tip of the bracket 21.

A scraper 7 is attached to the shaft 14,
The tip of the scraper 7 is formed so as to come into contact with the bed 1.

Incidentally, the side portion 21b of the bracket 21 serves as a stopper to prevent the scraper 7 from being lifted upward.

As the column 3 moves outward (in the direction of the solid line arrow in Figure 3), the roller 17 attempts to rotate counterclockwise along the bed 1 and pushes the other end of the scraper 7 against the bed 1. Because of the applying force, it moves in the same direction as the column while contacting the top of the bed 1, so the accumulated chips are carried in the direction of column movement. Here, the force that presses the scraper 7 against the bed is due to the squeezing force of the rollers 17 acting on the rail 11 by the U-shaped leaf spring 19, and the disk spring 16 that presses the rollers 17 and the flange 15 to integrate them. Determined by the difference in squeezing force, actually disc spring 1
A weak 6 is desirable. As the column 3 slides back (in the direction of the dotted straight arrow in Figure 3), the rollers 17 rotate clockwise due to friction with the rail 11, and the rotational force is transmitted by the frictional force transmitting member. The scraper 7 is swung through a disc spring 16 to separate it from the bed 1. When the scraper 7 is separated from the bed 1 by a certain amount, it comes into contact with the stopper part 21b provided on the bracket 21 and cannot swing, and the rotational force from the roller 17 thereafter is applied to the contact surface with the disc spring 16 provided between the scrapers 7. You will end up slipping.
By separating the scraper 7 from the bed 1 in this way, it is possible to prevent the remaining chips from being carried around.

Next, the operation of the above embodiment will be explained.

When the column 3 is moved in the direction of the straight arrow shown by the solid line in Figures 3B and 3C (rightward in Figure 3B and leftward in Figure 3C), the rollers 17 are caused by friction with the rail. Similar to column 3, a force acts to rotate in the direction of the solid arrow. Therefore, the force that presses the scraper 7 onto the bed 1 causes the scraper 7 to move forward in the same direction as the column 3 while contacting the bed 1, moving the accumulated chips and dropping them into the pit 9. be. When the column 3 is moved in the direction of the straight arrow indicated by the dotted line (opposite to the direction of the arrow indicated by the solid line), a force acts on the roller 17 to rotate in the direction of the straight arrow indicated by the dotted line, as described above, and as a result, the rail The scraper 7 is lifted up by the frictional force between the surfaces of the rollers 11 and 17. The scraper 7 can be oscillated by being set so that it oscillates between the position of the scraper 7' indicated by the two-dot chain line and the position of the scraper 7 indicated by the solid line, as shown in Fig. 3C.

Therefore, by separating the scraper 7 from the bed 1 and retracting it by the action of the surface friction force between the bed 1 and the rollers 17, the scraper 7 is prevented from carrying chips on the return trip, and the chips are completely removed just by moving forward. It processes.

Next, another embodiment of the scraper device of the present invention will be described based on FIG. 4. FIG. 4A is a front sectional view of another embodiment of the scraper device of the present invention installed between the bed 1 and the lower surface 3a of the column 3, and FIG.

In FIG. 4, a shaft 31 is attached to a part of the lower surface 3a of the column 3 via a bracket 31', and a scraper 7 is attached to the shaft 31 via a hinge 32. Brackets 33 are fixed to both sides of the scraper 7, and a horizontal through hole 34 is bored approximately in the center of the brackets 33. A shaft 36 fixed to one end of an L-shaped lever 35 is passed through the horizontal through hole 34 and screwed with a bolt, nut, or the like. The lever 35 is bent approximately in the middle, and the other end is bent into a U-shape, and a weight 37 is placed on the upper surface thereof. When the column 3 moves as indicated by the solid arrow (outward path), the scraper 7 moves in the Z-axis direction of the column 3 while contacting the top of the bed 1, moving the accumulated chips and dropping them into the pit 9. .
When the column 3 moves as indicated by the dotted arrow (return path), that is, when returning, the L-shaped lever 35
Due to the frictional force between the bent portion 35a and the bed 1 and the action of the weight 37, the L-shaped lever 35 slightly rotates clockwise as shown by the arrow with the shaft 36 as a fulcrum, and the scraper 7 moves the shaft 31. As a fulcrum, it is lifted upwards as shown by the two-dot chain line and returned in that state.

The operation of the above embodiment will be explained.

If column 3 is moved in the direction of the solid arrow,
While the scraper 7 is simply in contact with the bed 1,
Although it moves in the same direction as the column, when the column is moved in the direction of the dotted arrow (in the case of return), the friction force between the outer peripheral surface of the bent portion 35a of the lever 35 and the surface on the bed 1 and the weight As a result, as the lever 35 rotates clockwise as shown by the arrow with the shaft 36 as a fulcrum, the scraper 7 moves upward from the bed 1 in a slightly lifted state to prevent chips from being carried away. .

[Effect of idea]

The scraper device of the present invention uses a frictional force transmitting member to forcibly press the scraper against the deposit accumulation surface during the column's outward journey, and when returning to the column, prevents chips from being carried away. Since the contact between the scraper and the bed is mechanically separated, it is possible to completely remove accumulated chips with one operation of the scraper, which is efficient.

As a result, the working time for discharging chips can be significantly shortened, which in turn improves work efficiency.

[Brief explanation of the drawing]

1 is a front view of the bed and lower surface of a column of a column traveling type machining center, and FIG. 2 is a sectional view taken along arrow A in FIG. 1. FIG. 3 is a diagram showing an embodiment of the scraper device of the present invention, in which A is a front cross-sectional view, B is a BB cross-sectional view of A, and C is a CC cross-sectional view of A. FIG. 4 is a diagram showing another embodiment of the scraper device of the present invention, in which A is a front sectional view and B is a DD sectional view of A. 1... Bed (base), 3... Column (movable body), 7... Scraper, 8... Chips, 11...
Rail (guide portion), 12... Box-shaped bracket, 14... Shaft (shaft body), 15... Flange, 16... Belleville spring (frictional force transmission member), 17...
... Roller (rotating body), 19 ... U-shaped leaf spring (frictional force transmission member), 31 ... Shaft, 35 ... L-shaped lever, 35a ... Lever bending part, 36 ... Shaft, 37 ... ...Weight.

Claims (1)

[Scope of Claim for Utility Model Registration] A base having a guide portion, a movable body provided on the base so as to be able to freely move back and forth, and a movable body that engages with the movable body in a floating state and that moves in the direction of movement of the movable body. A shaft body that is regulated in a direction perpendicular to this movement direction and is rotatably supported while moving relative to the vertical direction; a frictional force transmitting member that is sandwiched between the rotating body and a part of the shaft body and applies a frictional force to frictionally connect the shaft body and the rotating body; a scraper having one end fixed to a shaft and the other end capable of contacting the deposit accumulation surface, which swings around the axis of the shaft as a fulcrum; When the movable body is moved in one direction by rotating the shaft, the shaft scraper is forcibly brought into contact with the deposit accumulation surface, and when it is moved in the other direction, it is brought into contact with the deposit accumulation surface. A scraper device characterized in that the scraper is forcibly separated from the scraper.