JP6281272B2 - Support device and machine tool - Google Patents

Description

  The present invention relates to a support device and a machine tool that support a supported device.

The machine tool includes a machine device that processes a workpiece (work), and a support device that is fixed to a factory floor and supports the machine device.
The support device may have a function of suppressing vibrations of the machine tool that occur during machining of the workpiece (see Patent Documents 1 and 2).

  The support device described in Patent Document 1 includes a support base fixed to the floor. The support base is provided with a fitting recess that opens upward. A damper block is attached to the lower part of the machine tool. The damper block is disposed inside the fitting recess without contacting the inner surface of the fitting recess. For this reason, a gap is formed between the outer surface of the damper block and the inner surface of the fitting recess. This void is filled with a viscous fluid.

  The support device described in Patent Document 2 includes a container member fixed to the floor. The container member has a bottomed cylindrical shape that opens upward. A movable member is attached to the lower part of the machine tool. The movable member is disposed inside the container member so as not to contact the inner surface of the container member. For this reason, a gap is formed between the outer surface of the movable member and the inner surface of the container member. This void is filled with a viscous fluid.

  In the case of the support devices described in Patent Documents 1 and 2, the vibration of the damper block or the movable member accompanying the vibration of the machine device is easily damped by the viscous resistance of the viscous fluid. Therefore, the vibration of the machine tool is suppressed.

JP-A-2-262933 JP-A-6-193679

In the case of the support device described in Patent Document 1, when the machine tool is moved, the damper block is pulled out from the fitting recess. Similarly, in the case of the support device described in Patent Document 2, the movable member is pulled out from the container member.
A viscous fluid adheres to the extracted damper block or movable member and the fitting recess or container member. Therefore, foreign substances are likely to adhere to these. Moreover, there exists a possibility that the viscous fluid adhering to a damper block or a movable member may be dripped unnecessarily.

  In order to solve such a problem, it is conceivable to remove (for example, wipe) the viscous fluid adhering to the damper block and the fitting recess, or the movable member and the container member, respectively. However, the operation of removing the viscous fluid is complicated. Furthermore, when the machine tool is again supported by the support device, it is necessary to fill the fitting recess or the container member with a viscous fluid. Furthermore, each time a viscous fluid is added, the running cost of the machine tool increases.

  The present invention has been made in view of such circumstances, and a main object thereof is to provide a support device and a machine tool capable of suppressing vibrations without depending on the viscous resistance of the viscous fluid.

The support device according to the present invention is a support device for supporting a protruding portion protruding from a supported device, and is slidable on a fixed portion provided with a loose insertion recess having a planar inner bottom surface and on the inner bottom surface The slide is provided with an insertion recess into which the tip of the protrusion is removably inserted on the opposite side of the portion contacting the inner bottom surface. The sliding portion is attached to the portion provided with the insertion recess, and has a larger frictional resistance to the inner bottom surface than the surface of the portion, and is slid onto the inner bottom surface. and a sliding member that rotatably contacts, characterized in Rukoto.

  The support device according to the present invention is characterized in that the loose insertion recess is expanded in diameter from the inner bottom surface toward the opening, and the inner peripheral surface of the loose insertion recess is rounded and continuous with the inner bottom surface. And

  A machine tool according to the present invention is a machine tool including a machine device and a support device that supports the machine device, and the machine device is supported by a base and an upper portion of the base so as to be movable in a lateral direction. A holding portion that holds the workpiece, a processing portion that processes the workpiece held by the holding portion, and a protruding portion that protrudes downward from the base, and the support device includes: It is a support device according to the present invention that supports the protruding portion.

In this invention, the front-end | tip part of the protrusion part which protrudes from a to-be-supported apparatus (for example, machine tool) is inserted in the insertion recessed part of a sliding part. The sliding portion is loosely inserted (inserted with play) into the loose insertion recess of the fixed portion. For this reason, the vibration of the supported device is transmitted to the sliding portion via the protruding portion, and the sliding portion vibrates inside the loose insertion recess. At this time, since the sliding portion slides with respect to the inner bottom surface of the loose insertion recess, frictional resistance is generated. Therefore, the vibration of the sliding part is easily damped. Therefore, the vibration of the supported device is suppressed.
There is no need to dampen between the protruding portion and the sliding portion.
From the above, it is not necessary to fill the insertion recess and the loose insertion recess with the viscous fluid.

  In the present invention, since the sliding member slides with respect to the inner bottom surface of the loose insertion recess, a large frictional resistance is generated. Therefore, the vibration of the supported device is further reliably suppressed.

  In the present invention, the inside of the loose insertion recess has a frustum shape extending toward the opening side, and the inner bottom surface and the inner peripheral surface of the loose insertion recess are rounded and continuous. Therefore, the collision between the sliding portion that vibrates inside the loose insertion recess and the inner peripheral surface of the loose insertion recess is alleviated. Therefore, the vibration of the supported device is more smoothly suppressed.

In this invention, the front-end | tip part of a protrusion part is loosely inserted in the support recessed part of a fixed support part. For this reason, a protrusion part vibrates inside a support recessed part with the vibration of a machine tool. At this time, since the tip of the protrusion slides with respect to the inner bottom surface of the support recess, a frictional resistance is generated. Therefore, the vibration of the protrusion is easily damped. Therefore, the vibration of the machine tool is suppressed.
From the above, there is no need to accommodate the viscous fluid in the support recess.

  In the present invention, since the friction member slides with respect to the inner bottom surface of the support recess, a large frictional resistance is generated. Therefore, the vibration of the machine tool is further reliably suppressed.

  In the present invention, the inside of the support recess has a frustum shape extending toward the opening, and the inner bottom surface and the inner peripheral surface of the support recess are rounded and continuous. Therefore, the collision between the protruding portion that vibrates inside the support recess and the inner peripheral surface of the support recess is alleviated. Therefore, the vibration of the supported device is more smoothly suppressed.

In the case of the support device and machine tool of the present invention, vibration can be suppressed by frictional resistance. In other words, vibration can be suppressed without depending on the viscous resistance of the viscous fluid.
Therefore, inconvenience (attachment of foreign matter and dripping of viscous fluid) due to viscous fluid does not occur. Furthermore, neither the operation of removing the viscous fluid nor the operation of filling the viscous fluid is required. Therefore, the convenience for the operator can be improved. Furthermore, since the viscous fluid is unnecessary, the running cost can be reduced.

1 is a perspective view schematically showing a configuration of a machine tool according to a first embodiment of the present invention. It is sectional drawing which shows schematically the structure of the support apparatus with which a machine tool is provided. It is an expanded sectional view which outlines the composition of a support device. It is a side view which shows the structure of a machine tool typically. It is a side view which shows typically the structure of the conventional machine tool. It is sectional drawing which shows schematically the structure of the support apparatus with which the machine tool which concerns on Embodiment 2 of this invention is provided. It is an expanded sectional view which outlines the composition of a support device. It is sectional drawing which shows schematically the structure of the fixed support part with which the machine tool which concerns on Embodiment 3 of this invention is provided. It is an expanded sectional view which outlines the composition of a fixed support part. It is an expanded sectional view which shows roughly the composition of the fixed support part with which the machine tool concerning Embodiment 4 of the present invention is provided. It is an expanded sectional view which shows roughly the structure of the support apparatus with which the machine tool which concerns on Embodiment 5 of this invention is provided.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. In the following description, up and down, front and rear, and left and right indicated by arrows in the figure are used.

Embodiment 1.
The machine tool 1 includes a machine device (supported device) 2 and four support devices 3.

The machine tool 2 includes a base 21, a holding part 22, a processing part 23, a support part 24, a control part 25, and a protruding part 26.
The base 21 has a bed shape with four leg portions 211 projecting therefrom. Each leg 211 has a through-hole 212 in the vertical direction. A female screw (not shown) is provided on the inner peripheral surface of the through hole 212.

The protruding portion 26 integrally includes a protruding column portion 261 and an insertion convex portion 262.
The protruding column part 261 is cylindrical. A male screw (not shown) is provided on the peripheral surface of the protruding column portion 261. The protruding column part 261 is screwed into the through hole 212 of the leg part 211 of the base 21. The lower end side of the protruding column part 261 protrudes downward from the leg part 211.
The insertion convex part 262 protrudes downward from the lower end part of the protruding column part 261. The insertion convex portion 262 has a columnar shape that is thinner than the protruding column portion 261.

A support column 24 is disposed on the upper portion of the base 21. The support | pillar part 24 is supporting the process part 23 so that an up-down movement is possible.
The processing unit 23 is disposed on the front side of the column unit 24. The support column 24 has a disk-shaped tool magazine 230 that is rotatable in the circumferential direction at the front of the processing unit 23. A plurality of tools 231 are detachably attached to the tool magazine 230.

A holding portion 22 is disposed below the processing portion 23 in the upper portion of the base 21. The holding unit 22 is a so-called table and holds a workpiece (not shown). The holding | maintenance part 22 is supported by the base 21 so that a movement in a horizontal direction is possible. The horizontal direction in the present embodiment is a direction other than the vertical direction, that is, the front-rear direction, the left-right direction, and a composite direction thereof.
A control unit 25 is disposed behind the support column 24. The control unit 25 controls the vertical movement of the processing unit 23, the rotation of the tool magazine 230, and the lateral movement of the holding unit 22.

  As the tool magazine 230 rotates, one of the plurality of tools 231 is sent to a workable position in the circumferential direction of the tool magazine 230. Further, when the machining unit 23 moves up and down, the tool 231 at the machining position comes into contact with and separates from the machining execution position at which the workpiece is machined. Furthermore, the processing part of the workpiece | work by the tool 231 is changed by the holding | maintenance part 22 moving to the front-back, left-right direction.

Each support device 3 is arranged below the machine device 2. Each support device 3 has a one-to-one correspondence with each leg 211.
Each support device 3 includes a fixed portion 31 and a sliding portion 32.
The sliding portion 32 integrally includes a loose insertion portion 321 and a protruding portion receiver 322.
The loose insertion portion 321 has a disk shape. The lower surface 32a of the loose insertion portion 321 has a circular planar shape. On the upper surface of the loose insertion portion 321, an upward mountain-shaped protrusion receiving portion 322 protrudes. An insertion recess 33 is provided at the top of the protruding portion receiver 322. The insertion recess 33 opens upward. The inside of the insertion recess 33 is a columnar column with a vertical posture. The inner diameter of the insertion recess 33 is approximately the same as the outer diameter of the insertion protrusion 262 of the protrusion 26 of the machine tool 2.

  In the insertion recess 33, the insertion projection 262 of the projection 26 of the machine device 2 (that is, the lower end portion of the projection 26) is detachably inserted. Even when the insertion convex portion 262 is inserted into the insertion concave portion 33, the protruding portion 26 and the sliding portion 32 are not coupled. However, the protruding portion 26 does not move laterally relative to the sliding portion 32.

The fixing portion 31 has a disk shape that is thicker than the loose insertion portion 321 of the sliding portion 32. The lower surface side of the fixing part 31 is fixed to the floor F of the factory. A loose insertion recess 41 is provided on the upper surface of the fixing portion 31.
The loose insertion recess 41 opens upward. The inside of the loose insertion recess 41 is cylindrical. The inner diameter of the loose insertion recess 41 is larger than the outer diameter of the loose insertion portion 321 of the sliding portion 32. The depth of the loose insertion recess 41 is shorter than the thickness of the loose insertion portion 321 of the sliding portion 32. The inner bottom surface 41 a of the loose insertion recess 41 has a circular planar shape with a lateral posture wider than the lower surface 32 a of the sliding portion 32. The inner bottom surface 41a and the inner peripheral surface 41b of the loose insertion recess 41 are orthogonal to each other.

A loose insertion portion 321 of the sliding portion 32 is loosely inserted into the loose insertion recess 41. The lower surface 32a of the sliding portion 32 is slidably in contact with the inner bottom surface 41a of the loose insertion recess 41. For this reason, the sliding portion 32 can move laterally relative to the fixed portion 31. In other words, the base 21 of the machine tool 2 can move laterally relative to the floor F. This is because the fixed portion 31 is fixed to the floor F, and the sliding portion 32 is attached to the base 21 via the protruding portion 26 of the machine tool 2.
Therefore, the difference between the inner diameter of the loose insertion recess 41 and the outer diameter of the loose insertion portion 321 of the sliding portion 32 is set to a sufficiently small value (for example, 1 mm or less).

For example, when the worker moves the machine tool 2 upward using a lifting device such as a table lifter at the time of rearrangement in the factory, the insertion protrusions 262 of the protrusions 26 are formed on the support devices 3. It is easily extracted from the insertion recess 33. Thereafter, the machine tool 2 is transported to a predetermined position.
When the operator moves the machining device 2 downward above each support device 3, the insertion convex portion 262 of the protrusion 26 is easily inserted into the insertion concave portion 33 of each support device 3. At this time, the machine tool 2 is stably placed on the support device 3 by its own weight.

  The protrusion amount from the leg part 211 of each protrusion part 26 of the machine tool 2 can be adjusted. For this reason, the position where the protrusion 26 is screwed into the through hole 212 of the leg 211 is adjusted. As a result, the distance from each floor 211 to the floor F, and thus the attitude of the base 21 is adjusted.

A difference between the machine tool 1 and a conventional machine tool will be described.
A conventional machine tool 100 shown in FIG. 5 includes a machine device 2 and four support devices 300.
Each support device 300 is provided with an insertion recess 33 in the upper part, and the lower part is fixed to the floor F. The support device 300 is an integral object, and does not have the fixed portion 31 and the sliding portion 32 of the support device 3. Therefore, the protrusion 26 of the machine tool 2 and the base 21 do not move laterally relative to the floor F.

When the holding part 22 of the machine tool 2 moves laterally, the holding part 22 vibrates unnecessarily in the lateral direction due to inertial force during acceleration / deceleration. In particular, when the work held by the holding unit 22 is heavy, when the holding unit 22 moves at high speed, or when the holding unit 22 changes its direction, unnecessary vibration of the holding unit 22 is likely to occur.
For example, when the holding unit 22 that has been moving forward at a high speed suddenly changes direction to the right, the holding unit 22 vibrates in the front-rear direction while moving right.
In the case of the conventional machine tool 100, for example, when a 100 kg workpiece is turned at high speed, vibration of 50 Hz to 60 Hz is generated. This vibration is substantially equal to the natural frequency of the holding portion 22. In particular, immediately after the direction change, the vibration of the holding portion 22 has a large amplitude of about 0.015 mm.

  The vibration of the holding part 22 attenuates with time. However, since the holding unit 22 is displaced in the vibration direction with respect to the processing unit 23 (specifically, the tool 231 at the processing execution position) during vibration, the processing accuracy deteriorates. Therefore, it is necessary to suppress unnecessary vibration of the holding portion 22.

Since the holding part 22 is supported by the base 21, the vibration energy of the holding part 22 propagates to the base 21.
For this reason, in the case of the machine tool 1, the base 21 vibrates with the vibration of the holding portion 22. However, the base 21 is less likely to vibrate compared to the holding portion 22, and the vibration of the base 21 is easily damped. This is because the base 21 is heavier than the holding part 22 because it supports the holding part 22, and the lower surface 32 a of the sliding part 32 is caused to vibrate by the vibration of the base 21. This is because a large frictional resistance is generated by sliding in the direction. Therefore, the vibration energy transmitted to the base 21 is quickly reduced.

Since the vibration energy of the holding part 22 is consumed outside the holding part 22, the vibration energy of the holding part 22 decreases rapidly. In other words, the vibration of the holding part 22 is quickly damped. Further, by causing the base 21 to vibrate simultaneously with the holding unit 22, the vibration frequency of the holding unit 22 does not match the natural frequency of the holding unit 22. Therefore, the vibration amplitude of the holding portion 22 is smaller than that of the conventional machine tool 100 (for example, about 0.008 mm).
In the case of the conventional machine tool 100, since the base 21 is fixed to the floor F via the support device 300, the vibration energy of the holding unit 22 is not consumed outside the holding unit 22.

  The lower surface 32a of the sliding portion 32 and the inner bottom surface 41a of the loose insertion recess 41 are both circular. Therefore, with the vibration of the sliding portion 32, the impact caused by the boundary portion between the lower surface 32a and the outer peripheral surface of the sliding portion 32 coming into contact with the boundary portion between the inner bottom surface 41a and the inner peripheral surface 41b of the loose insertion recess 41. Is smaller than the case where the lower surface 32a of the sliding portion 32 is rectangular, for example. This is because there is no corner collision like the four corners of a rectangle.

The machine tool 1 as described above can suppress the vibration of the holding portion 22 that occurs during the processing of the workpiece by the support device 3. The suppression of the vibration by the support device 3 is based on the frictional resistance and not based on the viscous resistance of the viscous fluid. That is, the machine tool 1 can suppress the vibration of the holding portion 22 without using a viscous fluid. Therefore, various inconveniences (adherence of foreign matter, deterioration of workability, increase in running cost, etc.) resulting from the use of the viscous fluid to suppress vibration are eliminated.
When a viscous fluid is used in the machine tool 1, the viscous fluid is filled into the loose insertion recess 41. The frictional resistance that should be generated between the lower surface 32a of the sliding portion 32 and the inner bottom surface 41a of the loose insertion recess 41 is lowered by the presence of the viscous fluid, and there is a possibility that the suppression of the vibration of the holding portion 22 is hindered.

Embodiment 2. FIG.
6 and 7 are a cross-sectional view and an enlarged cross-sectional view schematically showing the configuration of the support device 3 provided in the machine tool 1 according to Embodiment 2 of the present invention. FIG. 7 shows a portion surrounded by a broken line in FIG. 6 and 7 correspond to FIGS. 2 and 3 of the first embodiment.
The machine tool 1 according to the present embodiment has substantially the same configuration as the machine tool 1 according to the first embodiment. Hereinafter, differences from the first embodiment will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

The sliding portion 32 includes a loose insertion portion 321 and a protruding portion receiver 322, and a sliding member 323 separate from these.
The sliding member 323 has a circular flat plate shape in the horizontal position. The upper surface of the sliding member 323 is attached to the lower surface of the loose insertion portion 321. The lower surface 32b of the sliding member 323 has a circular planar shape in a lateral posture. The thickness of the sliding member 323 is shorter than the depth of the loose insertion recess 41.
The lower surface 32b of the sliding member 323 has the same area as the lower surface of the loose insertion portion 321 (that is, the lower surface 32a of the first embodiment). However, the frictional resistance of the lower surface 32b with respect to the inner bottom surface 41a of the loose insertion recess 41 is at least larger than the frictional resistance of the lower surface 32a of the first embodiment.

In the loose insertion recess 41, the loose insertion portion 321 and the sliding member 323 of the sliding portion 32 are loosely inserted. The lower surface 32b of the sliding portion 32 is slidably in contact with the inner bottom surface 41a of the loose insertion recess 41. Similarly to the sliding portion 32 of the first embodiment, the sliding portion 32 of the present embodiment can also move laterally relative to the fixed portion 31. However, since the frictional resistance related to the lower surface 32b is larger than the frictional resistance related to the lower surface 32a of the first embodiment, the vibration of the holding portion 22 is further damped more quickly.
Therefore, the machine tool 1 can more reliably suppress the vibration of the holding portion 22 that occurs during processing of the workpiece by the support device 3.

  When the fixed portion 31 and the sliding portion 32 are made of, for example, metal, in the machine tool 1 of the first embodiment, noise due to sliding of the lower surface 32a of the sliding portion 32 with respect to the inner bottom surface 41a of the loose insertion recess 41 is generated. Can occur. When the sliding member 323 is made of synthetic rubber, for example, in the machine tool 1 of the present embodiment, noise due to sliding can be reduced.

Embodiment 3. FIG.
8 and 9 are a cross-sectional view and an enlarged cross-sectional view schematically showing the configuration of the fixed support portion 5 provided in the machine tool 1 according to Embodiment 3 of the present invention. FIG. 9 shows a portion surrounded by a broken line in FIG. 8 and 9 correspond to FIGS. 2 and 3 of the first embodiment.
The machine tool 1 according to the present embodiment has substantially the same configuration as the machine tool 1 according to the first embodiment. Hereinafter, differences from the first embodiment will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

The machine tool 2 according to the present embodiment includes a protrusion 26 that is substantially the same as the protrusion 26 according to the first embodiment.
The protrusion 26 integrally includes a protrusion column 261 and an insertion protrusion 263.
The insertion convex part 263 protrudes downward from the lower end part of the protruding column part 261. The insertion convex portion 263 has a columnar shape that is thinner than the protruding column portion 261. The lower end surface 26a of the insertion convex portion 263 has a circular planar shape.

The machine tool 1 according to the present embodiment includes a fixed support portion 5 instead of the support device 3 according to the first embodiment.
The fixed support portion 5 integrally includes a fixed main body 51 and a protruding portion receiver 52. The fixed support portion 5 is a single body and does not have the sliding portion 32 and the fixed portion 31 of the first embodiment.

The fixed body 51 has a disk shape. The lower surface side of the fixed main body 51 is fixed to the floor F of the factory. On the upper surface of the fixed main body 51, an upward mountain-shaped protruding portion receiver 52 protrudes. A support recess 53 is provided at the top of the protrusion receiver 52.
The support recess 53 is open upward. The inside of the support recess 53 is cylindrical. The inner diameter of the support recess 53 is larger than the outer diameter of the insertion projection 263 of the projection 26 of the machine tool 2. The depth of the support recess 53 is approximately the same as the length of the insertion protrusion 263 of the protrusion 26 protruding from the protrusion column 261. The inner bottom surface 53 a of the support recessed portion 53 has a circular planar shape wider than the lower end surface 26 a of the protruding portion 26. The inner bottom surface 53a and the inner peripheral surface 53b of the support recess 53 are orthogonal to each other.

Inserted into the support recess 53 is an insertion projection 263 of the projection 26 of the machine tool 2 (that is, the tip on the lower side of the projection 26) so as to be detachable. Even when the insertion convex portion 263 is inserted into the support concave portion 53, the protruding portion 26 and the fixed support portion 5 are not coupled.
The lower end surface 26 a of the protrusion 26 is slidably in contact with the inner bottom surface 53 a of the support recess 53. The protruding portion 26 can move laterally relative to the fixed support portion 5. In other words, the base 21 of the machine tool 2 can move laterally relative to the floor F. This is because the fixed support portion 5 is fixed to the floor F and the protruding portion 26 is attached to the base 21.
Therefore, the difference between the inner diameter of the support concave portion 53 and the outer diameter of the insertion convex portion 263 of the protruding portion 26 is set to a sufficiently small value.

  Also in the case of the machine tool 1 according to the present embodiment, the base 21 vibrates in accordance with the vibration of the holding portion 22 as in the case of the machine tool 1 according to the first embodiment. However, the base 21 is less likely to vibrate compared to the holding portion 22, and the vibration of the base 21 is easily damped. This is because the base 21 is heavier than the holding part 22 because it supports the holding part 22, and the lower end surface 26 a of the protruding part 26 is brought into contact with the inner bottom surface 53 a of the supporting recessed part 53 as the base 21 vibrates. This is because a large frictional resistance is generated by sliding. Therefore, the vibration energy transmitted to the base 21 is quickly reduced.

  Since the vibration energy of the holding part 22 is consumed outside the holding part 22, the vibration energy of the holding part 22 decreases rapidly. In other words, the vibration of the holding part 22 is quickly damped. Further, by causing the base 21 to vibrate simultaneously with the holding unit 22, the vibration frequency of the holding unit 22 does not match the natural frequency of the holding unit 22. Therefore, the vibration amplitude of the holding portion 22 is smaller than that of the conventional machine tool 100.

Both the lower end surface 26a of the protrusion 26 and the inner bottom surface 53a of the support recess 53 are circular. Therefore, with the vibration of the protruding portion 26, the impact caused by the boundary portion between the lower end surface 26a and the outer peripheral surface of the protruding portion 26 coming into contact with the boundary portion between the inner bottom surface 53a and the inner peripheral surface 53b of the support recess 53 is For example, it is smaller than the case where the lower end surface 26a of the protruding portion 26 is rectangular. This is because there is no corner collision like the four corners of a rectangle.
The machine tool 1 as described above exhibits the same effects as the machine tool 1 of the first embodiment by the support device 3.

Embodiment 4 FIG.
FIG. 10 is an enlarged cross-sectional view schematically showing the configuration of the fixed support portion 5 provided in the machine tool 1 according to Embodiment 4 of the present invention. FIG. 10 corresponds to FIG. 9 of the third embodiment.
The machine tool 1 according to the present embodiment has substantially the same configuration as the machine tool 1 according to the third embodiment. Hereinafter, differences from the third embodiment will be described, and other parts corresponding to those of the third embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The protruding portion 26 includes a protruding portion main body including a protruding column portion 261 and an insertion convex portion 263, and a friction member 264 separate from these.
The friction member 264 has a circular flat plate shape. The upper surface of the friction member 264 is attached to the lower surface of the protruding column portion 261 (that is, the lower end portion of the protruding portion main body). The lower surface 26b of the friction member 264 has a circular planar shape.
The lower surface 26b has the same area as the lower end surface of the insertion convex portion 263 (that is, the lower end surface 26a of the third embodiment). However, the frictional resistance of the lower surface 26b against the inner bottom surface 53a of the support recess 53 is at least larger than the frictional resistance of the lower end surface 26a of the third embodiment.

An insertion convex portion 263 and a friction member 264 of the protruding portion 26 are loosely inserted into the support concave portion 53. The lower surface 26 b of the protrusion 26 is slidably in contact with the inner bottom surface 53 a of the support recess 53. For this reason, the protruding portion 26 of the present embodiment can also move laterally relative to the fixed support portion 5 similarly to the protruding portion 26 of the third embodiment. However, since the frictional resistance related to the lower surface 26b is larger than the frictional resistance related to the lower end surface 26a of the third embodiment, the vibration of the holding portion 22 is further attenuated.
Therefore, the machine tool 1 can more reliably suppress the vibration of the holding portion 22 that occurs during processing of the workpiece by the support device 3.

  When the protruding portion 26 and the fixed support portion 5 are made of, for example, metal, in the machine tool 1 of the third embodiment, noise is generated due to the sliding of the lower end surface 26a of the protruding portion 26 with respect to the inner bottom surface 53a of the supporting recess 53. Can do. Here, when the friction member 264 is made of synthetic rubber, for example, in the machine tool 1 according to the present embodiment, noise due to sliding can be reduced.

Embodiment 5 FIG.
FIG. 11 is an enlarged cross-sectional view schematically showing the configuration of the support device 3 provided in the machine tool 1 according to the fifth embodiment of the present invention. FIG. 11 corresponds to FIG. 3 of the first embodiment.
The machine tool 1 according to the present embodiment has substantially the same configuration as the machine tool 1 according to the first embodiment. Hereinafter, differences from the first embodiment will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

The support device 3 of the present embodiment has a loose insertion recess 42 instead of the loose insertion recess 41 of the first embodiment.
The loose insertion recess 42 opens upward. The inside of the loose insertion recess 42 has a truncated cone shape that expands upward. However, the inner peripheral surface 42b of the loose insertion recess 42 has a concave curved surface shape.
The inner bottom surface 42 a of the loose insertion recess 42 has a circular planar shape wider than the lower surface 32 a of the sliding portion 32.
A boundary portion between the inner bottom surface 42a and the inner peripheral surface 42b of the loose insertion recess 42 is a concave curved surface that smoothly continues to both the inner bottom surface 42a and the inner peripheral surface 42b. That is, the inner bottom surface 42a and the inner peripheral surface 42b of the loose insertion recess 42 are rounded and continuous.

The loose insertion recess 42 has the same effect as the loose insertion recess 41 of the first embodiment. Further, the loose insertion recess 42 reduces the collision between the sliding portion 32 that vibrates inside the loose insertion recess 42 and the inner bottom surface 42 a of the loose insertion recess 42. This is because the collision between the peripheral edge of the lower surface 32a of the sliding portion 32 and the boundary between the inner bottom surface 42a and the inner peripheral surface 42b of the loose insertion recess 42, and the outer peripheral surface of the loose insertion portion 321 of the sliding portion 32. This is because the collision between the loose insertion recess 42 and the inner peripheral surface 42b of the loose insertion recess 42 is suppressed.
Even if the sliding portion 32 rides on the boundary portion between the inner bottom surface 42a and the inner peripheral surface 42b of the loose insertion recess 42 or on the inner peripheral surface 42b, the sliding portion 32 and the machine device 2 are automatically weighted. Accordingly, the sliding portion 32 slides down onto the inner bottom surface 42a.
The inner peripheral surface 42b of the loose insertion recess 42 may be conical. Also in this case, it is desirable that the inner bottom surface 42a and the inner peripheral surface 42b of the loose insertion recess 42 are rounded and continuous.

In the machine tool 1 as described above, the support device 3 can more smoothly suppress the vibration of the holding portion 22 that occurs during processing of the workpiece.
Note that the loose insertion recess 42 of the present embodiment may be provided instead of the loose insertion recess 41 of the second embodiment. Further, the support concave portion 53 of the third and fourth embodiments expands in diameter from the inner bottom surface 53a side toward the opening side similarly to the loose insertion concave portion 42 of the present embodiment, and the inner bottom surface 53a and the inner peripheral surface 53b are formed. A configuration that is rounded and continuous may be used.
In addition, the support apparatus 3 or the fixed support part 5 of Embodiment 1-4 is not limited to the structure fixed to structures like the floor F of a factory, You may be fixed to the ground.

1 Machine tool 2 Machine tool (supported device)
21 Base 22 Holding part 23 Processing part 26 Projection part 261 Projection pillar part (projection part main body)
263 Insertion protrusion (protrusion body)
H.264 Friction member 3 Support device 31 Fixed portion 32 Slide portion 323 Slide member 33 Insertion recess 41, 42 Free insertion recess 5 Fixed support portion 53 Support recess

Claims (3)

In the support device that supports the protruding portion protruding from the supported device,
A fixed portion provided with a loose insertion recess having a planar inner bottom surface;
An insertion recess that is slidably contacted with the inner bottom surface and loosely inserted into the loose insertion recess, and the tip of the protruding portion is detachably inserted on the opposite side of the portion contacting the inner bottom surface And a sliding part provided with
The sliding part is
A portion provided with the insertion recess;
A sliding member attached to the portion, having a greater frictional resistance to the inner bottom surface than the surface of the portion, and slidably contacting the inner bottom surface;
Supporting device according to claim Rukoto equipped with. The loose insertion recess expands from the inner bottom surface toward the opening side,
The support device according to claim 1, wherein an inner peripheral surface of the loose insertion recess is rounded and continues to the inner bottom surface. Machine tool,
A machine tool comprising: a support device for supporting the machine device;
The machine tool is
The base,
A holding portion that is supported by the upper portion of the base so as to be movable in the lateral direction and holds the workpiece;
A processing unit for processing the workpiece held by the holding unit;
A projecting portion projecting downward from the base,
The machine tool according to claim 1 or 2 , wherein the support device supports the protrusion.

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