JP6828867B1 - Automatic tool changer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic tool changing device capable of preventing and suppressing cutting water from entering a main body case. An output shaft 2 having a change arm 3 provided at a tip thereof is an automatic tool changing device 1 that moves forward and backward from a guide cylinder 11a of a main body case 11, and an oil seal 51 is provided on the guide cylinder 11a. A guide so that the cutting water contact portion 2A, which is the tip portion where the output shaft 2 advances most and protrudes from the guide cylinder 11a, does not enter the main body case 11 side of the oil seal 51 when the output shaft 2 retracts most. The length of the cylinder 11a is set. [Selection diagram] Fig. 1

Description

The present invention relates to an automatic tool changer (ATC: Automatic Tool Changer) that is arranged in a machine tool such as a machine tool and automatically changes a tool.

The automatic tool changer automatically changes the tool by grasping and releasing the tool at a predetermined timing by moving the output shaft to which the change arm is attached in the axial direction or rotating it around the axis. A cam type, a hydraulic type, a motor type, or the like is known as such an automatic tool changing device. For example, in the cam type, the tool is changed as follows (see, for example, Patent Document 1).

That is, as shown in FIGS. 6 and 7, a shift cam 103 and a swivel cam (not shown) are arranged on the cam shaft 102 arranged in the main body case 101, and a worm shaft is provided on the outer periphery of the shift cam 103. A worm gear that meshes with the 104 is formed, and a cam groove is formed on the board surface of the shift cam 103. The base end side of the lever 105 is mounted on the cam groove, and the tip end side of the lever 105 is mounted on the shift groove 110a of the output shaft 110. Further, a change arm 111 is arranged at the tip of the output shaft 110, and gripping portions for gripping the tool holder are provided at both ends of the change arm 111.

Then, when the worm shaft 104 rotates, the cam shaft 102 rotates, the tip end side of the lever 105 moves up and down with the rotation of the shift cam 103, and the output shaft 110 moves back and forth (reciprocating) in the axial direction. Further, the output shaft 110 is provided with a cam follower that meshes with the swivel cam, and when the swivel cam rotates, the output shaft 110 rotates around the axis and the change arm 111 rotates.

JP-A-2009-39823

By the way, it is expected that machine tools such as machine tools will be developed for full automation and 24-hour operation in the future. Along with this, it is expected that the cutting chips, which are currently being manually removed, will be washed under high pressure using cutting water. That is, since it is unknown where the chips are attached, it is considered that a method of injecting cutting water from a plurality of positions in various directions to remove the chips is adopted. However, the injected cutting water is sucked by the automatic tool changing device 100, the cutting water accumulates in the automatic tool changing device 100, the lubricating oil containing the cutting water deteriorates, and each part in the automatic tool changing device 100 is rusted. There is a risk of adverse effects such as wear and tear.

That is, in the state where the output shaft 110 is most retracted, as shown in FIG. 6, the tip end side of the output shaft 110 is exposed to the outside from the open end (gauge line) P1 of the guide cylinder 101a of the main body case 101, and is cut from the atmosphere. It becomes the contact portion 110A exposed to water. On the other hand, when the output shaft 110 is advanced to the forward end P2, as shown in FIG. 7, the contact portion 110A of the output shaft 110 and the contact portion 110B between the opening end P1 and the front of the contact portion 110A are in contact with the atmosphere. Exposed to cutting water. That is, the contact portion 110A is constantly exposed to the atmosphere and cutting water, and the contact portion 110B is exposed to the lubricating oil in the main body case 101 or the atmosphere and cutting water, and the contact portion 110C is another part. Is constantly exposed to the lubricating oil in the body case 101.

Then, as the contact portion 110B moves back and forth from the main body case 101, the cutting water adhering to the contact portion 110B is sucked into the main body case 101. That is, the oil seal 106 is arranged on the opening end P1 side of the guide cylinder 101a, but as shown in FIG. 8, the output shaft 110 moves forward and backward, so that the seal lip 106a of the oil seal 106 and the output shaft A pump force F is generated in the gap with the 110, and the cutting water adhering to the contact portion 110B is sucked into the main body case 101.

It is conceivable to provide packing on the guide cylinder 101a in order to prevent such suction of cutting water, but not only the cutting water but also the lubricating oil is removed (scraped off), and the inside of the main body case 101 Lubricating oil is reduced and the oil runs out. Further, although chips can be removed only by providing the dust seal on the guide cylinder 101a, the cutting water and the lubricating oil enter the main body case 101.

Therefore, an object of the present invention is to provide an automatic tool changer capable of preventing and suppressing cutting water from entering the main body case.

The invention according to claim 1 for achieving the above object is an automatic tool changing device in which an output shaft provided with a change arm at the tip thereof moves forward and backward from a guide cylinder of a main body case. An oil seal is provided, and the cutting water contact portion, which is a tip portion where the output shaft advances most and protrudes from the guide cylinder, enters the main body case side of the oil seal when the output shaft retracts most. The length of the guide cylinder is set so that the change arm is substantially cylindrical and extends coaxially with the guide cylinder, and one end thereof is attached to the tip end portion of the output shaft. An arm main body provided at the other end of the retainer accommodating portion and provided with a grip portion for gripping the tool holder is provided, and the grip portion is in a predetermined position on the main body case side in a state where the output shaft is most retracted. It is located and is characterized in that the cutting water contact portion is accommodated in the guide cylinder and the retainer accommodating portion .

The invention according to claim 2 is characterized in that, in the automatic tool changing device according to claim 1 , a dust seal for removing chips is provided on the free end side of the guide cylinder with respect to the oil seal. And.

According to the first aspect of the present invention, the length (position of the oil seal) of the guide cylinder is set so that the cutting water contact portion does not enter the main body case side of the oil seal when the output shaft is most retracted. Therefore, it is possible to prevent and suppress cutting water from entering the main body case. That is, the part where the output shaft moves forward most and protrudes from the guide cylinder (cutting water contact part) is exposed to the atmosphere and cutting water, but even if the output shaft moves backward most, it enters the main body case side of the oil seal. do not do. Therefore, it is possible to prevent and suppress the cutting water adhering to the cutting water contact portion of the output shaft from entering the main body case (inside the oil seal).

Further , the change arm is formed so that the grip portion is positioned at a predetermined position when the output shaft is most retracted. Therefore, for example, by setting the predetermined position to the position of the grip portion which is the same as the conventional one, the automatic tool changing device can be arranged at the same position as the conventional one with respect to the gauge line. That is, even if the guide cylinder is longer than the conventional one, the existing automatic tool changing device and the present automatic tool changing device can be easily replaced. Further, since the grip portion is located on the main body case side, the center of gravity of the change arm is located on the main body case side, and it is possible to increase the rigidity and stability of the automatic tool changer.

According to the second aspect of the present invention, since the dust seal for removing chips is provided on the free end side of the guide cylinder with respect to the oil seal, the chips are inside the main body case (inside the oil seal). It can be prevented from invading.

FIG. 5 is a schematic configuration diagram showing a state in which the output shaft of the automatic tool changer according to the first embodiment of the present invention is retracted most. FIG. 5 is a schematic configuration diagram showing a state in which the output shaft of the automatic tool changer of FIG. 1 is most advanced. It is a top view which shows the periphery of the grip part of the change arm of the automatic tool change device of FIG. FIG. 5 is a schematic configuration diagram showing a state in which the output shaft of the automatic tool changer according to the second embodiment of the present invention is most retracted. FIG. 5 is a schematic configuration diagram showing a state in which the output shaft of the automatic tool changer of FIG. 4 is most advanced. It is a schematic block diagram which shows the state in which the output shaft of the conventional automatic tool changer is most retracted. 6 is a schematic configuration diagram showing a state in which the output shaft of the automatic tool changer of FIG. 6 is most advanced. FIG. 6A is a diagram showing a positional relationship between an oil seal and an output shaft of the automatic tool changer of FIG. 6, and FIG.

Hereinafter, the present invention will be described based on the illustrated embodiment.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram (schematic front view) showing a state in which the output shaft 2 of the automatic tool changing device 1 according to this embodiment is most retracted, and FIG. 2 is a schematic configuration diagram (schematic front view) of the output shaft 2 of the automatic tool changing device 1. Is a schematic configuration diagram showing the most advanced state, and is shown with hatching only in a part for easy viewing. The automatic tool changing device 1 is a device in which the output shaft 2 provided with the change arm 3 at the tip thereof moves back and forth and reciprocates from the entrance / exit (guide cylinder) 11a of the main body case 11, and is on the change arm 3 side. The configuration is different from the conventional automatic tool changer, and the details of the equivalent configuration are omitted, but the configuration is roughly as follows. Here, in this embodiment, the case of the vertical type in which the output shaft 2 is arranged so as to extend in the vertical direction will be described.

A camshaft 12 is rotatably arranged in the main body case 11, and a shift cam 13 and a swivel cam (not shown) are arranged on the camshaft 12. A worm gear 13a is formed on the outer periphery of the shift cam 13, and the worm gear 13a meshes with the worm shaft 14. When the worm shaft 14 is driven by the motor 14A, the driving force is transmitted to the shift cam 13, and the cam shaft 12 and the swivel cam rotate.

An annular cam groove is formed on the board surface of the shift cam 13, and the cam curve, which is the annular contour of the cam groove, is set so that the output shaft 2 moves forward and backward at a predetermined timing. The base end side cam follower of the lever 15 is slidably mounted on the cam groove, and the tip end side cam follower 15a of the lever 15 is mounted on the shift groove 2a of the output shaft 2. Then, when the shift cam 13 rotates, the base end side cam follower slides along the cam groove, and the tip end side cam follower 15a moves up and down. Along with this vertical movement, the output shaft 2 reciprocates (advances and retreats) in the vertical direction.

Further, the output shaft 2 is provided with a swivel ring 21 that meshes with the swivel cam, and the swivel cam rotates so that the output shaft 2 rotates via the swivel ring 21. In this way, the output shaft 2 and the change arm 3 reciprocate in the axial direction and rotate around the axis.

The change arm 3 extends substantially orthogonal to the output shaft 2 and is attached to the output shaft 2 at the central portion, and is shown on the tip side of two rod-shaped arm main bodies 31 extending opposite to the central portion, as shown in FIG. As described above, the grip portion 3a for gripping the tool holder H is provided. The shape and grip structure of the grip portion 3a may be any shape. For example, the grip portion 3a is formed in an arc shape, and lock pins 3b are arranged in both ends of the change arm 3 so as to be able to advance and retreat. Then, when the lock pin 3b advances toward the grip portion 3a, the tool holder H is sandwiched and gripped between the grip portion 3a and the lock pin 3b, and the lock pin 3b retracts from the grip portion 3a to cause the tool holder H. It is designed to release the grip of. The configuration of the central portion of the change arm 3 will be described later.

With respect to such a basic structure, as shown in FIG. 1, a retainer seal (guide cylinder) 4 is provided at the open end / free end of the entrance / exit 11a. The retainer seal 4 is added to the conventional doorway 11a to form a guide cylinder together with the doorway 11a. The retainer seal 4 has a tubular shape into which the output shaft 2 is inserted, and is arranged coaxially with the doorway 11a and has a length thereof. The cutting water is set to be slightly longer than the stroke length D3 of the output shaft 2 so that the cutting water adhering to the cutting water contact portion 2A, which will be described later, does not always surely enter the main body case 11 side of the oil seal 51. ..

Specifically, it has a substantially cylindrical shape with an inner diameter slightly larger than the outer diameter of the output shaft 2, a predetermined space is formed between the output shaft 2 and the ring-shaped outer brim portion that extends outward at the upper end and one end. 41 is provided. On the other hand, on the opening end (lower end) side of the entrance / exit 11a, which is the boundary with the retainer seal 4, a concave oil seal pocket 11b connected to the inner hole is formed in a ring shape, and the oil seal is formed in the oil seal pocket 11b. 51 is housed. Then, the outer brim portion 41 is sandwiched between the ring-shaped holding plate 52 and the opening end surface of the doorway 11a, and the retainer bolt 53 is tightened from the holding plate 52 to the doorway 11a, so that the retainer seal 4 is attached to the opening end of the doorway 11a. It is connected. In this mounted state, the oil seal 51 is sandwiched between the oil seal pocket 11b and the outer brim portion 41 of the retainer seal 4. Here, the oil seal 51 is an annular seal that prevents the lubricating oil in the main body case 11 from leaking out and foreign matter from entering the main body case 11.

On the other hand, ring-shaped inner brim portions 42 projecting toward the output shaft 2 are provided on the lower end side and the other end portion of the retainer seal 4. A concave dust seal pocket 42a connected to the inner hole of the retainer seal 4 is formed in a ring shape on the inner brim portion 42, and the dust seal 54 is housed in the dust seal pocket 42a. That is, the dust seal 54 is provided on the free end side of the guide cylinder with respect to the oil seal 51. The dust seal 54 is an annular seal that removes chips and dust adhering to the tip end side of the output shaft 2 and prevents the chips from entering the retainer seal 4 and the main body case 11.

The tip end side of the output shaft 2 protrudes from such a retainer seal 4, and the change arm 3 is attached to this protruding portion. Then, as shown in FIG. 1, the change arm 3 is formed so that the grip portion 3a is located at a predetermined position on the main body case 11 side in a state where the output shaft 2 is most retracted to the main body case 11 side.

That is, a retainer accommodating portion 32 which is substantially cylindrical and extends coaxially with the retainer seal 4 and can accommodate the retainer seal 4 is formed in the central portion of the change arm 3, and the lower end side and one end portion of the retainer accommodating portion 32 are formed. A ring-shaped mounting portion 33 projecting to the output shaft 2 side is provided. Then, with the inner peripheral surface of the mounting portion 33 in contact with the output shaft 2, the retainer accommodating portion 32, that is, the change arm 3 is attached to the tip end portion of the output shaft 2 by the accommodating bolt 34.

The two arm bodies 31 are arranged on the upper end side and the other end of the retainer accommodating portion 32 so as to face each other and extend in a straight line when viewed from the front and the upper side. That is, in this embodiment, a mounting portion 35 that extends horizontally and projects and faces each other is formed on the upper end side of the retainer accommodating portion 32, and a mounting hole 35a is formed from the free end surface of the mounting portion 35. Then, by mounting the base end portion of the arm body 31 in the mounting hole 35a, the arm body 31 is detachably attached to the retainer accommodating portion 32. In such a mounting state, the two arm bodies 31 extend substantially orthogonal to the output shaft 2. Here, in this embodiment, the two arm main bodies 31 and the retainer accommodating portion 32 are separate bodies, but the two arm main bodies 31 may be integrally formed, or the two arm main bodies 31 may be integrally formed. And the retainer accommodating portion 32 may be integrally formed.

Further, between the retainer accommodating portion 32 and the mounting portion 35, a plurality of columnar stopper pins 36 extending in parallel with the output shaft 2 are arranged around the axis of the retainer accommodating portion 32. The stopper pin 36 projects toward the main body case 11 from the arm main body 31 and the mounting portion 35, and can come into contact with the holding plate 52 in a state where the output shaft 2 is most retracted to the main body case 11 side, so that the arm main body 31 and the like can be brought into contact with the holding plate 52. It prevents damage. As described above, in this embodiment, the reference point (upper end) of the change arm 3 coincides with the gauge line P1 in the state where the output shaft 2 is most retracted.

Here, the arrangement position / height of the arm body 31 and the grip portion 3a (the length of the retainer accommodating portion 32) is such that when the output shaft 2 is most retracted, the grip portion 3a is a conventional / existing automatic tool changer. It is located at the same position (predetermined position) as the grip portion of 100, and is set so that the distance to the gauge line P1 is the same as the conventional one. That is, when the gauge line distance D1 from the gauge line P1 which is the reference surface of the spindle end surface of the machine tool to the center line P0 of the camshaft 12 is set to the same dimension as the conventional one shown in FIG. The arrangement position and height of the grip portion 3a are set so that the distance of the grip portion 3a with respect to the line P1 is the same as that of the conventional one. In other words, even if the camshaft 12 is installed on the same center line P0 as the conventional one, the tool holder H can be properly gripped and opened on the same gauge line P1 as the conventional one. As described above, in the change arm 3 of this embodiment, both arm main bodies 31 are located closer to the main body case 11 than the central portion attached to the tip end portion of the output shaft 2, and the grip portion 3a is the gauge line P1. It is located in a predetermined position on the side.

On the other hand, when the output shaft 2 advances most toward the anti-body case 11, as shown in FIG. 2, the change arm 3 advances from the gauge line P1 by the stroke length D3, and the tip surface P2 of the output shaft 2 also advances only by the stroke length D3. Advance. In this state, the tip-side portion (cutting water contact portion 2A) of the output shaft 2 protruding from the retainer seal 4 is exposed to the atmosphere and cutting water, but the other portion, the lubricating oil contact portion 2B on the inlet / outlet 11a side. Is housed and protected in the retainer seal 4 and is not exposed to cutting water. Then, when the output shaft 2 is retracted most again, as shown in FIG. 1, the cutting water contact portion 2A is accommodated in the retainer seal 4 and the retainer accommodating portion 32 and is housed in the main body case 11 (inside the oil seal 51). Does not enter, and the lubricating oil contact portion 2B is housed in the main body case 11.

As described above, the cutting water contact portion 2A of the output shaft 2 is always exposed to the atmosphere or the cutting water, and the lubricating oil contact portion 2B is always exposed to the lubricating oil or the atmosphere. Here, the dimension D2 in FIGS. 2 and 7 is the distance from the lower end surface of the main body case 11 to the gauge line P1.

According to the automatic tool changer 1 having such a configuration, the length of the guide cylinder (so that the cutting water contact portion 2A does not enter the main body case 11 side of the oil seal 51 when the output shaft 2 is most retracted ( The position of the oil seal 51) is set. That is, since the retainer seal 4 is connected to the inlet / outlet 11a, it is possible to prevent or suppress the cutting water from entering the main body case 11. That is, the cutting water contact portion 2A, which is the portion where the output shaft 2 advances most and protrudes from the retainer seal 4, is exposed to the atmosphere and cutting water, but is located in the retainer seal 4 even if the output shaft 2 retracts most. However, the oil seal 51 does not enter the main body case 11 side, that is, the entrance / exit 11a. Therefore, it is possible to prevent and suppress the cutting water adhering to the cutting water contact portion 2A of the output shaft 2 from entering the main body case 11 (inside the oil seal 51). As a result, even if full automation progresses in the future and cutting water is sprayed in various directions, it is possible to prevent and suppress the deterioration of the lubricating oil containing the cutting water and adversely affecting each part. Become.

Further, the change arm 3 is formed so that the grip portion 3a is positioned at a predetermined position when the output shaft 2 is most retracted. Therefore, as described above, by setting the predetermined position to the position of the grip portion which is the same as the conventional one, the automatic tool changing device 1 can be arranged at the same position as the conventional one with respect to the gauge line P1. That is, even if the retainer seal 4 is provided and the guide cylinder is longer than the conventional one, the existing automatic tool changing device 100 and the present automatic tool changing device 1 can be easily replaced. Further, since the grip portion 3a is located on the main body case 11 side, the center of gravity of the change arm 3 is located on the main body case 11 side (camshaft 12 side), and the rigidity and stability of the automatic tool changing device 1 can be improved. It becomes.

Further, since the dust seal 54 for removing chips and the like is provided on the retainer seal 4 on the free end side of the guide cylinder oil seal 51, the chips and the like are inside the main body case 11 (inside the oil seal 51). Can be prevented from invading.

(Embodiment 2)
FIG. 4 is a schematic configuration diagram (schematic front view) showing a state in which the output shaft 2 of the automatic tool changing device 10 according to this embodiment is most retracted, and FIG. 5 is a schematic configuration diagram (schematic front view) of the output shaft 2 of the automatic tool changing device 10. Is a schematic configuration diagram showing the most advanced state, and is shown with hatching only in a part for easy viewing. In this embodiment, the shape and configuration of the change arm 3 are different from those in the first embodiment, and the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Here, in this embodiment, as shown in FIG. 4, the outer brim portion 41 of the retainer seal 4 is attached to the opening end surface of the doorway 11a without being sandwiched by the holding plate 52, and is pressed to the lower end surface of the retainer seal 4. The plate 52 is attached. The dust seal 54 is housed in the dust seal pocket 52a of the holding plate 52. As described above, the pressing plate 52 constitutes a part of the retainer seal 4 as in the first embodiment.

The change arm 3 in this embodiment has the same configuration as the change arm 111 of the conventional / existing automatic tool changing device 100, and is formed so as to extend substantially straight in the horizontal direction. That is, a mounting portion 35 that extends horizontally and projects and faces each other is formed in a substantially disk-shaped central portion 37 attached to the tip end portion of the output shaft 2, and the base of the arm body 31 is formed in the mounting hole 35a of the mounting portion 35. The end is attached. In such an attached state, the two arm main bodies 31 extend substantially orthogonal to the output shaft 2, and the central portion 37 and the two arm main bodies 31 extend substantially straight and linearly when viewed from the front and above. ..

Here, in this embodiment, the retainer is located so that the reference point P3 of the change arm 3 is located lower (on the anti-main body case 11 side) by the stroke length D3 (= D4) as compared with the first embodiment and the conventional case. The length of the seal 4 is set. Therefore, in the state where the output shaft 2 is most retracted, the reference point P3 of the change arm 3 is located at a position separated downward by the stroke length D3 from the gauge line P1 of the first embodiment, as shown in FIG. Therefore, in order to properly grip and release the tool holder H on the same gauge line P1 as in the first embodiment, it is necessary to install the automatic tool changing device 10 upward by the stroke length D3 (= D4). Further, when the retainer seal 4 is made longer, it is necessary to install the automatic tool changing device 10 further upward by the extension.

On the other hand, when the output shaft 2 advances most, the change arm 3 advances from the reference point P3 by the stroke length D3, as shown in FIG. In this state, the tip end side portion (cutting water contact portion 2A) of the output shaft 2 protruding from the retainer seal 4 is exposed to the atmosphere and cutting water, but the other portion, the lubricating oil contact portion 2B, is the retainer seal. Contained and protected in 4 and not exposed to cutting water. Then, when the output shaft 2 is most retracted again, as shown in FIG. 4, the cutting water contact portion 2A is housed in the retainer seal 4 and does not enter the main body case 11 (inside the oil seal 51). The lubricating oil contact portion 2B is housed in the main body case 11.

As described above, according to the first embodiment, the cutting water contact portion 2A of the output shaft 2 is always exposed to the atmosphere or the cutting water (not exposed to the lubricating oil), and the lubricating oil is not exposed to the lubricating oil. Since the contact portion 2B is always exposed to the lubricating oil or the atmosphere (not exposed to the cutting water), it is possible to prevent or suppress the cutting water from entering the main body case 11. Further, since the change arm 3 is formed so as to extend substantially straight in the horizontal direction, the configuration can be simplified, the weight can be reduced, and the cost can be reduced, and the conventional change arm 111 extending substantially straight can be used. It will be possible. Therefore, the automatic tool changer 10 can be easily configured simply by attaching the retainer seal 4 to the conventional / existing automatic tool changer 100 and lengthening the output shaft 2.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like within a range that does not deviate from the gist of the present invention. Included in the invention. For example, in the above embodiment, the guide cylinder is composed of the doorway 11a and the retainer seal 4 which are separate bodies, but the guide cylinder may be integrally formed. That is, the length of the guide cylinder may be set so that the cutting water contact portion 2A does not enter the main body case 11 side of the oil seal 51 even if the output shaft 2 retracts most. Therefore, the guide cylinder, which is the conventional entrance / exit 11a, is extended by the stroke length D3 or more so that the cutting water contact portion 2A does not enter the main body case 11 side of the oil seal 51 even if the output shaft 2 retracts most. The one provided with the seal 51 is also included in the present invention.

Further, although the case of the vertical type automatic tool changer has been described, it is needless to say that the output shaft 2 can be applied to the horizontal type automatic tool changer extending substantially horizontally. Similarly, the case of the cam type automatic tool changer has been described, but it goes without saying that it can also be applied to the hydraulic type and the motor type.

1, 10 Automatic tool changer 11 Main body case 11a Doorway (guide cylinder)
12 Camshaft 13 Shift cam 14 Warm shaft 15 Lever 2 Output shaft 2A Cutting water contact part 2B Lubricating oil contact part 3 Change arm 3a Grip part 31 Arm body 32 Retainer accommodating part 37 Central part 4 Retainer seal (guide cylinder)
51 Oil seal 54 Dust seal H Tool holder

Claims (2)

The output shaft with the change arm at the tip is an automatic tool changer that moves forward and backward from the guide cylinder of the main body case.
An oil seal is provided on the guide cylinder.
The guide so that the cutting water contact portion, which is the tip portion where the output shaft advances most and protrudes from the guide cylinder, does not enter the main body case side of the oil seal when the output shaft retracts most. The length of the cylinder is set ,
The change arm is substantially cylindrical and extends coaxially with the guide cylinder, and one end is provided at the retainer accommodating portion attached to the tip of the output shaft and the other end of the retainer accommodating portion to grip the tool holder. An arm main body provided with a grip portion is provided, the grip portion is located at a predetermined position on the main body case side in a state where the output shaft is most retracted, and the cutting water contact portion is the guide cylinder and the guide cylinder. Contained in the retainer containment,
An automatic tool changer that features this. A dust seal for removing chips is provided on the free end side of the guide cylinder with respect to the oil seal.
The automatic tool changer according to claim 1 .

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