KR20180048229A - Tool transfer apparatus for machine tool - Google Patents

Abstract

Disclosed is a tool transfer apparatus for a machine tool, comprising: a gripper unit including a magazine unit on which a tool is loaded, a first gripper, a second gripper disposed opposite to the first gripper and clamping the tool together with the first gripper, and an interval adjusting unit for adjusting an interval between the two; a guide unit for providing a movement path of the gripper unit; and a convey unit coupled to the gripper unit and configured to move the gripper unit on the guide unit.

Description

Technical Field [0001] The present invention relates to a tool transfer apparatus for a machine tool,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool transfer apparatus for a machine tool, and more particularly, to a tool transfer apparatus for a machine tool in which the structure is simplified and the time for clamping and transferring a tool is shortened.

Generally, in an automatic tool changer, the tool transfer device transports the tool from the magazine where the tool is loaded to the tool change position and simultaneously performs the straight run or the turn according to the path. At this time, various tools are used to feed the tool.

In the case of the conventional automatic tool changer, the tool is detached and detached by using the air cylinder when the tool rotates 90 degrees and the tool is detached. The cost and the operation time are increased due to the separate sensor for confirming the configuration and detachment of the tool . Therefore, there is a need to improve this.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Registration No. 10-1225189 (entitled " automatic tool changer of a machining center, date: 2013.01.16 ").

The present invention has been made in view of the above needs, and it is an object of the present invention to provide a gripper unit having an interval adjusting unit for adjusting an interval between a first gripper and a second gripper by an elastic restoring force, And a tool transfer device for a machine tool.

A tool transfer apparatus for a machine tool according to the present invention comprises: a magazine part on which a tool is loaded; A second gripper disposed opposite the first gripper and clamping the tool together with the first gripper, and a second gripper disposed between the first gripper and the second gripper for adjusting an interval between the first gripper and the second gripper by an elastic restoring force, A gripper portion having an adjustment portion; A guide unit for providing a movement path of the gripper unit; And a transfer unit coupled to the gripper unit and configured to move the gripper unit on the guide unit.

The gap adjusting unit may include: a shaft portion passing through the first gripper on the adjustment groove portion of the first gripper so as to be brought into contact with the second gripper; An elastic member inserted into the adjustment groove to surround the outer surface of the shaft and elastically supporting the shaft; And a fixing part fixing the shaft part to the second gripper.

The shaft portion may include a shaft body passing through the first gripper and the second gripper; And a shaft head extending outwardly from the periphery of the shaft of the shaft, the elastic member having one end disposed on the bottom surface of the adjustment groove and the other end disposed on the bottom surface of the shaft head, .

Further, the shaft head is characterized in that its outer diameter is smaller than the diameter of the adjustment groove portion.

When the shaft head is in contact with the magazine portion, the shaft head is moved to the inside of the adjustment groove portion while compressing the elastic member, and the gap between the first gripper and the second gripper is enlarged.

When the gripper portion is separated from the magazine portion, the shaft head is restored by the resilient restoring force of the elastic member, and the gap between the first gripper and the second gripper is narrowed.

Further, the magazine portion is provided with a pressing projection formed outwardly to press the shaft head.

Further, the pressing projection has an outer diameter smaller than the diameter of the adjusting groove.

The tool sensing unit may further include a tool sensing unit installed in the magazine unit to sense the tool, and the tool sensing unit senses the tool to transmit sensed information to the control unit, and the control unit operates the conveyance unit based on sensed information. .

In addition, the transfer unit may include a transfer block to which the first gripper is coupled; And a driving unit coupled to the conveying unit block and guiding the operation of the conveying unit block.

The tool transferring device for a machine tool according to the present invention has a simple structure through a gripper part having an interval adjusting part for adjusting the distance between the first gripper and the second gripper by an elastic restoring force so that the time for clamping and transporting the tool is shortened .

In addition, in the present invention, since the gap between the first gripper and the second gripper can be adjusted without an additional driving device such as an air cylinder for attaching and detaching the tool, the gap adjustment part has an effect of reducing the component cost.

In addition, in the present invention, the gripper section does not require a separate sensor for checking whether the tool is attached or detached, thereby reducing the operation time of the gripper section in the magazine section for loading the tool.

Further, in the present invention, the fixing portion firmly fixes the shaft portion to the second gripper, thereby preventing the shaft from being separated from the second gripper when the gap between the first gripper and the second gripper is adjusted.

Further, in the present invention, since the outer diameter of the pressing protrusion projected outward from the magazine portion is smaller than the diameter of the adjusting groove portion, there is an effect that the shaft head can be conveniently pressed using the pressing protrusion.

Further, in the present invention, since the outer diameter of the shaft head is smaller than the diameter of the adjustment groove, the shaft head can be moved to the inside of the adjustment groove so that the elastic member can be easily compressed.

In addition, in the present invention, the controller can determine whether the tool is mounted on the tool port of the magazine through the tool sensing unit for sensing the tool, and can quickly operate the transfer unit accordingly.

In addition, in the present invention, the control unit can accurately position the conveyance unit at a predetermined position through the operation sensing unit that senses the operation of the conveyance unit.

In addition, in the present invention, the control unit can determine whether the conveying unit is fixed by the position fixing unit through the position fixing sensor that detects the fixing state of the conveyance unit, and quickly operate the shaft according to the detected position.

1 is a perspective view of a tool transfer apparatus for a machine tool according to an embodiment of the present invention.
2 is an enlarged view of a portion A in Fig.
3 is a perspective view of a main part of a tool transfer apparatus for a machine tool according to an embodiment of the present invention.
4 is a view showing that the gripper portion of the tool transfer apparatus for a machine tool according to the embodiment of the present invention is moved to the magazine portion side.
5 is an enlarged view of Fig.
FIG. 6 is a view showing that the distance between the first gripper and the second gripper is increased by pressing the gap adjusting portion of the tool transfer device for a machine tool according to an embodiment of the present invention in a state of being in contact with the magazine portion.
FIG. 7 is a schematic view showing that a gripper-attached tool of a tool transfer apparatus for a machine tool is moved in a clamped state according to an embodiment of the present invention.
8 is a schematic view showing that the gap adjusting portion of the tool transferring device for a machine tool is brought into contact with the magazine portion according to an embodiment of the present invention.
FIG. 9 is a schematic view showing that the interval between the first gripper and the second gripper is increased by pressing the gap adjusting portion of the tool transfer device for a machine tool according to the embodiment of the present invention in contact with the magazine portion.
10 is a view showing that the gripper part is moved to a set position along the guide part by the operation of the transfer part of the tool transfer device for a machine tool according to the embodiment of the present invention.
11 is a view illustrating that the gripper is positioned at a set position by operation of a transfer unit of a tool transfer apparatus for a machine tool according to an embodiment of the present invention.
12 is a perspective view showing that the gripper portion of the tool transfer apparatus for a machine tool according to the embodiment of the present invention is located at a set position.

Hereinafter, a tool transfer apparatus for a machine tool according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view of a tool transfer apparatus for a machine tool according to an embodiment of the present invention, FIG. 2 is an enlarged view of a portion A of FIG. 1, FIG. 4 is an enlarged view of FIG. 4, FIG. 6 is an enlarged view of FIG. 4, and FIG. 6 is a cross-sectional view of the present invention FIG. 7 is a view showing that the distance between the first gripper and the second gripper is increased by pressing the gap adjusting portion of the tool transferring device for a machine tool according to the embodiment of the present invention in contact with the magazine portion. FIG. FIG. 8 is a schematic view illustrating a gripper portion of a tool transfer apparatus for a machine tool according to an embodiment of the present invention, which is moved in a clamped state. FIG. FIG. 9 is a schematic view showing how the interval between the first gripper and the second gripper is pressed in a state where the gap adjusting portion of the tool transferring device for a machine tool transferring device according to the embodiment of the present invention is in contact with the magazine portion, FIG. 10 is a view showing that the gripper part is moved to a set position along the guide part by the operation of the transfer part of the tool transfer device for a machine tool according to the embodiment of the present invention, and FIG. FIG. 12 is a view showing that the gripper is positioned at the set position by the operation of the transfer unit of the tool transfer apparatus for a machine tool according to one embodiment. FIG. 12 is a view showing the gripper unit setting of the tool transfer apparatus for a machine tool according to an embodiment of the present invention In the position shown in Fig.

1 to 6, a tool transfer apparatus 1 for a machine tool according to an embodiment of the present invention includes a magazine unit 100, a gripper unit 200, a guide unit 300, and a transfer unit 400 .

A plurality of tools 10 are stacked on the magazine part 100. A plurality of tool pots 110 (Tool Pot) on which the tool 10 is mounted are rotatably installed in the magazine unit 100 (see FIG. 12).

The gripper unit 200 includes a first gripper 210, a second gripper 220, and a gap adjusting unit 230. The second gripper 220 is disposed to face the first gripper 210, and the first gripper 210 and the second gripper 210

Clamp the tool (10) together.

The gap adjusting unit 230 adjusts the gap between the first gripper 210 and the second gripper 220 by an elastic restoring force. Specifically, the gap adjusting unit 230 contacts the magazine unit 100 and is compressed when pressed to widen the gap between the first gripper 210 and the second gripper 220. On the contrary, when the gap adjusting unit 230 is released from the contact with the magazine unit 100, the gap adjusting unit 230 returns to the original position due to the elastic restoring force, thereby narrowing the gap between the first gripper 210 and the second gripper 220.

The guide portion 300 provides a movement path of the gripper portion 200. At this time, a guide rail 310 is installed on the guide part 300 along the movement path in which the gripper part 200 moves.

The transfer unit 400 is coupled to the gripper unit 200 and moves the gripper unit 200 on the guide unit 300. Specifically, when the gripper unit 200 clamps the tool 10 mounted on the magazine unit 100, the feeder unit 400 is mounted on the main shaft (not shown) with the tool 10 clamped to the gripper unit 200 The gripper unit 200 can be moved to the set position P. The transfer unit 400 can move the gripper unit 200 to the set position P so that the gripper unit 200 can clamp the tool 10 from the main shaft.

The transfer unit 400 includes a transfer unit block 410 and a driving unit 420. The second gripper 220 is coupled to the transfer block 410. At this time, the conveyance block 410 is rotatably coupled to the driving unit 420 and may include a moving roller (not shown) that moves along the guide rail 310.

The driving unit 420 is coupled to the transport block 410 and guides the transport block 410. The driving part 420 is adjusted in length so that the gripper part 200 is moved along the guide part 300 by the cylinder.

When the length of the driving unit 420 is increased, the conveying unit block 410 is moved along the guide rail 310 while being rotated 90 degrees toward the main axis, and the gripper unit 200 connected to the conveying unit block 410 is also rotated 90 And is moved toward the main shaft while being rotated. That is, the gripper unit 200 is moved to a position close to the main axis, that is, to the setting position P.

The feeder block 410 is moved along the guide rail 310 while being rotated 90 degrees toward the magazine 100 and the gripper 200 is also moved to the feeder block 410 And is moved toward the magazine unit 100 while being rotated by 90 degrees. That is, the gripper unit 200 is moved to a position close to the magazine unit 100, that is, to a set position.

The gap adjusting portion 230 includes a shaft portion 231, an elastic member 232, and a fixing portion 233. The shaft portion 231 penetrates the first gripper 210 on the adjustment groove 211 of the first gripper 210 and is disposed in contact with the second gripper 220.

The elastic member 232 is inserted into the adjustment groove portion 211 so as to surround the outer surface of the shaft portion 231 and elastically supports the shaft portion 231.

The fixing portion 233 fixes the shaft portion 231 to the second gripper 220. The fixing portion 233 is coupled to an end portion of the shaft portion 231 penetrating the second gripper 220 with a nut so that when the gap between the first gripper 210 and the second gripper 220 is adjusted, 220 to prevent the shaft portion 231 from being disengaged.

The shaft portion 231 includes a shaft body 231a and a shaft head 231b. The shaft body 231 a penetrates the first gripper 210 and the second gripper 220. The shaft body 231a passes through the first gripper 210 while being fixed to the second gripper 220 in a straight shape.

The shaft head 231b extends outwardly from the periphery of the shaft body 231a. The shaft head 231b is formed at the end of the shaft body 231a, and is moved to the right (reference in FIG. 6) when it is pressed while being in contact with the magazine part 100. [ When the movable shaft head 231b is moved to the right (reference in FIG. 6), the shaft body 231a is also moved to the right (reference in FIG. 6). At this time, the elastic member 232 is compressed by the shaft head 231b while being moved to the right (reference in FIG. 6).

One end of the elastic member 232 is disposed on the bottom surface of the adjustment groove portion 211 and the other end is disposed on the bottom surface of the shaft head 231b to elastically support the shaft head 231b. Thereby, when the shaft head 231b is contacted and pressed against the magazine part 100, the shaft head 231b can easily compress the elastic member 232 while being in contact with the magazine part 100. [

Conversely, when the shaft head 231b comes into contact with the magazine part 100 and is released from the pressed state, the shaft head 231b can be quickly returned to its original position by the resilient restoring force of the elastic member 232. [

7 to 9, the outer diameter D3 of the shaft head 231b is smaller than the diameter D1 of the adjustment groove 211 (see FIG. 9). Therefore, the shaft head 231b can be moved to the inside of the adjustment groove portion 211 to easily compress the elastic member 232. [

When the shaft head 231b contacts the magazine part 100, the first gripper 210 and the second gripper 220 are moved to the inside of the adjustment groove part 211 while compressing the elastic member 232, .

Specifically, as the shaft head 231b moves to the inside of the adjustment groove 211, that is, to the right (as shown in FIG. 9), the shaft body 231a is moved to the right The second gripper 220 coupled to the end of the second gripper 231a is also moved to the right (reference to FIG. 9). At this time, the elastic member 232 compresses from the length L1 to the length L2.

Accordingly, the first gripper 210 and the second gripper 220, which are coupled to the transfer block 410 and are fixed in position, are spaced apart from each other, Thus, the tool 10 that has been clamped by the first gripper 210 and the second gripper 220 can be mounted on the tool port 110 of the magazine part 100 while being unclamped (see FIG. 9).

The shaft head 231b is restored by the resilient restoring force of the elastic member 232 and the gap between the first gripper 210 and the second gripper 220 is narrowed.

Specifically, when the gripper unit 200 is moved along the guide unit 300 by the operation of the transfer unit 400, the shaft head 231b is moved outwardly of the adjustment groove unit 211 by the elastic restoring force of the elastic member 232 7), and the second gripper 220 coupled to the end of the shaft body 231a is also moved to the left (the base of FIG. 7) as the shaft body 231a is moved to the left (Refer to FIG. 7). At this time, the elastic member 232 is elastically restored from the length L2 to the length L1.

The gap between the first gripper 210 and the second gripper 220 coupled to the transfer block 410 is removed and the gap between the first gripper 210 and the second gripper 220 220 are brought into contact with each other. Thus, the tool 10 can be clamped between the first gripper 210 and the second gripper 220.

The magazine part 100 is provided with a pressing protrusion 120 protruding outwardly to press the shaft head 231b. The outer diameter D2 of the pressing projection 120 is smaller than the diameter D1 of the adjusting groove 211 (see FIG. 8). Therefore, the shaft head 231b can be easily pressed by the pressing projection 120. [

The tool transfer apparatus 1 for a machine tool according to the present invention further includes a tool sensing unit 500 installed in the magazine unit 100 for sensing the tool 10 and the tool sensing unit 500 senses the tool 10 And transmits the detection information to the control unit 600. The control unit 600 operates the transfer unit 400 based on the detection information.

Specifically, when the tool sensing unit 500 senses that the tool 10 is mounted on the tool port 110, the tool sensing unit 500 transmits the sensed sensing information to the controller 600. [ The control unit 600 operates the transfer unit 400 so that the gripper unit 200 contacts the magazine unit 100 based on the sensing information received from the tool sensing unit 500. [ That is, the driving unit 420 is operated to operate the shaft head 231b to be brought into contact with the magazine unit 100. Thereby, the gripper portion 200 can be positioned close to the tool 10 mounted on the tool port 110 in the unclamped state. Thereafter, the gripper portion 200 can clamp the tool 10 while the transfer portion 400 is moved along the guide portion 300 by the control portion 600 (see FIGS. 10 and 11).

When the gripper unit 200 clamps the tool 10 from the main shaft and moves to the magazine unit 100 side, the tool sensing unit 500 detects that the tool 10 is not mounted on the tool port 110 The tool sensing unit 500 transmits the sensed sensing information to the controller 600. [ The control unit 600 operates the transfer unit 400 based on the sensing information received from the tool sensing unit 500 so that the gripper unit 200 can unclamp the tool 10. [ Specifically, the driving unit 420 is operated to allow the shaft head 231b to contact the magazine unit 100. Thereby, the tool 10 clamped to the gripper portion 200 can be mounted on the tool port 110 while being unclamped.

The tool transfer device 1 for a machine tool is further provided with a position fixing part 700 which is installed in the guide part 300 and is movable in the vertical direction so as to fix the position of the transfer part 400. [ The position fixing unit 700 is moved toward the cylinder transfer unit 400 to press the transfer unit 400 to fix the transfer unit 400. Specifically, when the gripper unit 200 is moved to the set position P by the operation of the feed unit 400, the position fixing unit 700 is moved downward (reference in FIG. 12) to press the feed unit 400, So that the transfer unit 400 can be fixed in position at the setting position P.

As described above, since the position of the feeding unit 400 is firmly fixed at the setting position P, the gripper unit 200 clamps the tool 10 from the main spindle or the tool 10 clamped to the gripper unit 200 Shaking or breakage of the tool 10 when mounted on the spindle can be minimized.

The transfer unit 400 further includes an operation sensing unit 430. The operation sensing unit 430 senses the operation of the transfer unit 400 and transmits operation information to the control unit 600. [ The control unit 600 stops the operation of the conveyance unit 400 based on the operation information.

The operation sensing unit 430 includes a first operation sensing unit 431 and a second operation sensing unit 432. The first operation sensing unit 431 senses the state before the conveying unit 400 is operated, that is, the state before the driving unit 420 is operated. Specifically, the first operation sensing unit 431 senses that the conveying unit 400 is positioned at a predetermined position close to the magazine unit 100 before the conveying unit 400 is rotated 90 degrees. The first operation sensing unit 431 transmits sensing information to the control unit 600 and the control unit 600 stops the operation of the conveyance unit 400 based on the sensing information received from the first operation sensing unit 431. That is, when the conveying unit 400 is positioned at the set position, the control unit 600 stops the operation of the conveying unit 400 to be positioned at the set position.

The second operation sensing portion 432 senses that the second operation sensing portion 432 is operated to rotate the conveying portion 400 by 90 degrees and is positioned at the set position P. [ Specifically, the driving unit 420 is operated to sense a state where the length is increased to the set position P. The second operation sensing unit 432 transmits sensing information to the control unit 600 and the control unit 600 stops the operation of the conveyance unit 400 based on the sensing information received from the second operation sensing unit 432. That is, when the conveying unit 400 is positioned at the set position P, the control unit 600 stops the operation of the conveying unit 400 to be positioned at the set position P. In this way, the control unit 600 stops the operation of the transfer unit 400 based on the operation detection unit 430, so that the transfer unit 400 can be accurately positioned at the set position.

The position fixing unit 700 includes a position fixing sensor 710 for sensing the fixing of the transfer unit 400. The position fixing sensor 710 detects the fixing of the transfer unit 400 and outputs sensing information to the controller 600 , And the control unit 600 operates the shaft based on the sensed information.

The position fixation sensing unit 710 includes a first position fixation sensing unit 711 and a second position fixation sensing unit 712. The first position fixed sensing unit 711 senses that the conveying unit 400 is fixed by the position fixing unit 700. Specifically, the first position fixing sensor 711 is moved downward (refer to FIG. 12) together with the position fixing portion 700 to contact the transferring portion 400, thereby detecting the fixing state of the transferring portion 400. The first position fixing sensor 711 transmits sensing information to the controller 600. The controller 600 controls the gripper 200 to mount the clamped tool 10 on the shaft, The shaft portion is moved toward the gripper portion 200 so that the tool holder 200 can clamp the tool 10 on the shaft portion.

The second position fixed sensing unit 712 senses that the position fixing unit 700 has returned to the home position. Specifically, the second position fixed sensing unit 712 senses that the position fixing unit 700 is moved upward (refer to FIG. 9) and returned to the home position. Here, returning the position fixing unit 700 to the home position means that the fixing unit of the transfer unit 400 is released. The second position fixed sensing unit 712 transmits sensing information to the control unit 600, and the control unit 600 operates the shaft based on the sensed information to place the sensing unit in place. Thereafter, the control unit 600 moves the transfer unit 400 to the magazine unit 100 side.

In this way, the controller 600 can detect whether the conveying unit 400 is fixed by the position fixing unit 700 through the position fixing sensor 710, and quickly operate the shaft.

Hereinafter, the operation and effect of the tool transfer apparatus 1 for a machine tool according to an embodiment of the present invention will be described with reference to FIGS. 4 to 12. FIG.

In order to replace the tool 10 mounted on the tool port 110 of the magazine part 100 and the tool 10 mounted on the main shaft, the gripper part (200) is positioned at the setting position (P) on the guide portion (300). The second operation sensing unit 432 senses that the conveyance unit 400 is positioned at the set position P and transmits the sensed information to the control unit 600. The control unit 600 senses the conveyance unit 400 And stops the operation of the transfer unit 400 at the set position P. Thereby, the gripper unit 200 moved together with the transfer unit 400 can be positioned at the setting position P on the guide unit 300.

Next, the control unit 600 operates the position fixing unit 700 to fix the position of the transfer unit 400 at the setting position P. [ At this time, the first position fixing sensor 711 moves downward (refer to FIG. 12) together with the position fixing part 700 and contacts the conveying part 400, so that the conveying part 400 is rotated by the position fixing part 700 Detect the fixed one. The first position fixing sensor 711 transmits sensing information to the controller 600. The controller 600 controls the shaft portion so that the gripper 200 can clamp the tool 10 on the shaft based on the sensing information . The main shaft is moved toward the gripper portion 200 side, and the gripper portion 200 clamps the tool 10 from the main shaft.

When the gripper unit 200 clamps the tool 10 from the main shaft and the position fixing unit 700 is positioned in the home position, the second position fixing sensor 712 detects the position and transmits the sensing information to the controller 600 , And the control unit 600 operates the shaft based on the sensing information and returns the same to its original position. Thereafter, the control unit 600 operates the transfer unit 400 to move the transfer unit 400 to the magazine unit 100 side.

When the transfer unit 400 is positioned at a predetermined position close to the magazine unit 100, the first operation sensing unit 431 senses the sensing unit 431 and transmits the sensed information to the controller 600. The control unit 600 stops the operation of the conveyance unit 400 based on the sensing information received from the first operation sensing unit 431. Thereby, the transfer unit 400 can be accurately positioned at the set position.

Subsequently, the tool sensing unit 500 determines whether the tool 10 is mounted on the tool port 110, and transmits it to the control unit 600. When the tool sensing unit 500 senses that the tool 10 is not mounted on the tool port 110 and transmits sensing information to the control unit 600, the control unit 600 receives the sensing information from the tool sensing unit 500 The gripper unit 200 is unclamped such that the tool 10 clamped from the main shaft is mounted on the tool port 110 by operating the transfer unit 400 based on the detection information.

More specifically, the control unit 600 operates the transfer unit 400 so that the gripper unit 200 is pressed against the pressing protrusion 120 of the magazine unit 100 to be unclamped. That is, when the gripper unit 200 contacts the pressing protrusion 120 of the magazine unit 100, the gap adjusting unit 230 is operated to separate the first gripper 210 and the second gripper 220 from each other.

Specifically, the shaft body 231a is moved to the right (reference in FIG. 9) while the shaft head 231b is moved to the inside of the adjustment groove 211, that is, 220) are also shifted to the right (reference to FIG. 9). As a result, the first gripper 210 and the second gripper 220, which are coupled to the transfer block 410 and fixed in position, are spaced apart from each other by W. The tool 10 that has been clamped by the first gripper 210 and the second gripper 220 is unclamped and mounted on the tool port 110 of the magazine portion 100. [

When the magazine unit 100 is rotated and the tool sensing unit 500 senses that the tool 10 is mounted on the tool port 110, the sensing unit 500 transmits sensing information to the controller 600, And activates the transfer unit 400 based on the sensing information transmitted from the sensing unit 500. That is, the control unit 600 moves the transfer unit 400 to the magazine unit 100 side. The gripper part 200 is pressed against the pressing protrusion 120 of the magazine part 100 and the first gripper 210 and the second gripper 220 are spaced apart and unclamped by the gap adjusting part 230 .

When the first gripper 210 and the second gripper 220 are separated from each other and unclamped as described above, the tool 10 is positioned between the first gripper 210 and the second gripper 220. The tool 10 positioned between the first gripper 210 and the second gripper 220 is clamped while the transfer unit 400 is moved along the guide unit 300. [

Specifically, when the gripper unit 200 is moved along the guide unit 300 by the operation of the transfer unit 400, the shaft head 231b is moved outwardly of the adjustment groove unit 211 by the elastic restoring force of the elastic member 232 7), the shaft body 231a is moved to the left (reference in FIG. 7) while the second gripper 220 is also moved to the left (reference in FIG. 7). The gap W formed between the first gripper 210 and the second gripper 220 coupled to the transfer block 410 is removed and the first gripper 210 and the second gripper 220 220 are brought into contact with each other. Thus, the tool 10 disposed between the first gripper 210 and the second gripper 220 is clamped.

When the gripper unit 200 is moved together with the transfer unit 400 and is positioned at the set position P on the guide unit 300, the second operation sensor unit 432 detects that the transfer unit 400 is positioned at the set position P . The second operation sensing unit 432 transmits sensing information to the control unit 600 and the control unit 600 stops the operation of the conveyance unit 400 based on the sensing information received from the second operation sensing unit 432. Thereby, the transfer unit 400 can be accurately positioned at the setting position P. [

Next, the control unit 600 operates the position fixing unit 700 to fix the position of the transfer unit 400 at the setting position P. [ Specifically, when the gripper unit 200 clamping the tool 10 by the operation of the transfer unit 400 is moved to the set position P, the controller 600 moves the position fixing unit 700 downward The transport unit 400 can be fixed in position at the set position P. In addition, the first position fixing sensor 711 is moved downward (refer to FIG. 12) together with the position fixing unit 700 and contacts the conveyance unit 400, thereby detecting the fixing state of the conveyance unit 400. The first position fixing sensor 711 transmits sensing information to the controller 600 and the controller 600 moves the shaft to the gripper 200 based on the sensed information and transmits the clamped tool 10 to be mounted on the shaft.

As described above, the tool transfer apparatus 1 for a machine tool according to the present invention comprises a gripper part (not shown) having an interval adjusting part 230 for adjusting the distance between the first gripper 210 and the second gripper 220 by an elastic restoring force, 200 can be shortened by clamping and transporting the tool 10.

Since the gripper unit 200 does not require a separate sensor for confirming whether the tool 10 is attached or detached, the operation time of the gripper unit 200 can be reduced in the magazine unit 100 that loads the tool 10 have.

Also, since the interval adjusting unit 230 can adjust the distance between the first gripper 210 and the second gripper 220 without an additional driving device such as an air cylinder for attaching and detaching the tool 10, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the following claims.

1: Tool transferring device for machine tool 10: Tool
100: magazine part 110: tool pot
120: pressing projection 200: gripper part
210: first gripper 211: adjusting groove
220: second gripper 230:
231: shaft portion 231a: shaft body
231b: Shaft head 232: Elastic member
233: Fixing portion 300: Guide portion
310: guide rail 400:
410: feeder block 420:
430: operation detection unit 431: first operation detection unit
432: second operation sensing part 500: tool sensing part
600: control unit 700: position fixing unit
710: Position fixing detection unit 711: First position fixing detection unit
712: second position fixed sensing unit

Claims (10)

A magazine part on which the tool is loaded;
A second gripper disposed opposite the first gripper and clamping the tool together with the first gripper, and a second gripper disposed between the first gripper and the second gripper for adjusting an interval between the first gripper and the second gripper by an elastic restoring force, A gripper portion having an adjustment portion;
A guide unit for providing a movement path of the gripper unit; And
And a transfer unit coupled to the gripper unit and configured to move the gripper unit on the guide unit.
The method according to claim 1,
Wherein,
A shaft portion passing through the first gripper on the adjustment groove portion of the first gripper so as to be brought into contact with the second gripper;
An elastic member inserted into the adjustment groove to surround the outer surface of the shaft and elastically supporting the shaft; And
And a fixing part fixing the shaft part to the second gripper.
3. The method of claim 2,
The shaft portion
A shaft body passing through the first gripper and the second gripper; And
And a shaft head extending outwardly from the periphery of the shaft sea,
Wherein one end of the elastic member is disposed on a bottom surface of the adjustment groove and the other end is disposed on a bottom surface of the shaft head to elastically support the shaft head.
The method of claim 3,
Wherein the shaft head has an outer diameter smaller than a diameter of the adjustment groove portion.
The method of claim 3,
Wherein when the shaft head is in contact with the magazine portion, the shaft head is moved to the inside of the adjustment groove portion while compressing the elastic member,
Wherein the gap between the first gripper and the second gripper is widened.
6. The method of claim 5,
When the gripper portion is separated from the magazine portion, the shaft head is restored by the elastic restoring force of the elastic member,
Wherein the gap between the first gripper and the second gripper is narrowed.
6. The method of claim 5,
Wherein the magazine portion is provided with a pressing projection formed outwardly to press the shaft head.
8. The method of claim 7,
Wherein the pressing projection has an outer diameter smaller than a diameter of the adjusting groove.
The method according to claim 1,
And a tool sensing unit installed in the magazine unit for sensing the tool,
Wherein the tool sensing unit senses the tool and transmits sensed information to the control unit, and the control unit operates the conveyance unit based on sensed information.
The method according to claim 1,
The transfer unit
A transfer block to which the first gripper is coupled; And
And a drive unit coupled to the feed block and configured to guide the operation of the feed block.

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