Tool port fixing and releasing device of machine tool magazine

Abstract

The utility model provides a tool port fixing and releasing device of a machine tool magazine, the machine tool magazine is a horizontal tool magazine and is provided with a chain link in a wireless track form and a tool port rotating device, the chain link in the wireless track form rotates along a moving path of a frame, and the tool port rotating device rotates along the moving path of the frame. The tool port rotating device is arranged on one side of the frame, and the tool port fixing and releasing device of the machine tool magazine is provided with a ring rod type traction bolt which protrudes in the right-angle direction relative to the length direction of the tool port and is fixed on one side face of a main body of the tool port; a tool port fixing device which is provided to each link constituting the chain link and fixes the traction bolt so as to prevent the traction bolt from disengaging from the gripper; and a tool port releasing device which is provided on one side of the frame of the tool magazine and which advances and retreats so as to release the traction bolt of the tool port from the tool port fixing device.

Description

Technical Field

[0001] This utility model relates to a tool magazine device for a machine tool, and more specifically, to a device for fixing and releasing a tool port that can be detached from the tool magazine. Background Technology

[0002] Typically, machine tools have a tool library to store multiple tools in order to perform various processing operations.

[0003] One type of tool magazine is the horizontal tool magazine, which uses chain links that are interconnected in the form of C-channels, which are designed to allow tool ports to be installed in the horizontal direction. These chain links are connected in a wireless track manner. When these chain links mesh with sprockets that are rotated by the tool magazine motor and rotate along a movement path set on the tool magazine frame, the tool ports stored in the grippers are moved to the position for tool changing with the spindle via a tool port rotation device.

[0004] When this type of tool magazine rotates along the movement path of the tool magazine with the tool port mounted on the gripper of the chain link, or during an emergency stop, the tool port needs to be firmly fixed to the gripper to prevent it from detaching from the gripper. Furthermore, after stopping at the tool change position equipped with the tool port rotation device, when it is moved to the position for tool change with the spindle via the tool port rotation device, it needs to be able to easily detach from the gripper.

[0005] However, in tool libraries where the tool port for inserting tools is detached from the gripper of the chain link, in order to quickly change tools with the spindle, it is necessary to increase the rotation speed of the chain link. For this purpose, a tool port guide is required on the movement path of the chain link to prevent the tool port from detaching.

[0006] If a tool port guide is not installed, the rotation speed of the chain links needs to be reduced to prevent the tool port from detaching from the grippers of the chain links during rotation.

[0007] As a result, in tool libraries with detachable tool ports, in order to increase the rotation speed of the chain links and shorten tool change time, tool port guides need to be set on the movement path of the chain links. This leads to a problem of increased complexity in the tool library structure and increased manufacturing costs.

[0008] Therefore, in existing tool port detachable tool magazines, in order to avoid the complex structure of the tool magazine device and prevent the tool port from detaching, tool port guides are not used. Instead, a structure that reduces the rotational speed of the chain links is chosen.

[0009] Correspondingly, while it can simplify the structure of the tool library and reduce manufacturing costs, it also leads to a fatal problem of reduced productivity due to the increased tool changeover time caused by the reduced rotation speed of the chain links.

[0010] On the other hand, as prior art, Patent Document 1 relates to a device in which the tool port and chain are made separately, so that the chain does not need to be disassembled when the tool port is damaged. The device includes: a port guide 151 with an opening on one side for the tool port 14 to enter and exit; a spacer 152 for maintaining a constant distance between the port guide 151 and the tool port 14; a connecting pin 153 for connecting the port guide 151; a ball bearing 154 for smooth movement of the chain 15; a fixing rod 156 for fixing the upper part of the port guide 151; and a bolt 157 for fixing the fixing rod 156 (see Patent Document 1). Figure 5 ).

[0011] Furthermore, in the structure described in Patent Document 2, a standby port assembly 100, a sub-changing assembly 200 that interacts with the standby port assembly 100 to perform tool changing, and a tool gripper assembly 220 that grips tools and is supported by a left-right transfer mechanism 240 mounted on the upper end of the body frame 210 are provided on one side of the tool library 300. The tool gripper assembly 210 is transferred in the left-right direction toward the assembly 100 (see Patent Document 2). Figures 3 to 8 ).

[0012] Furthermore, Patent Document 3 discloses a tool handling mechanism for a chain-type tool magazine. This structure includes a frame, a track, a moving unit, and an actuating cylinder. The track is set on the frame and has an arc-shaped section. The moving unit can move along the track and has tool clamps that can clamp or release tool ports. The actuating cylinder is biasably connected to the frame. The push-pull linkage of the actuating cylinder pushes or pulls the moving unit, so that the tool ports can move between two fixed positions and can change the swing direction of the tool ports.

[0013] Furthermore, in the structure described in Patent Document 4, the tool port for storing the tool is held in the horizontal direction by the chain, the chain is composed of a chain with multiple claws connected by a side open that can be inserted into the tool port in the horizontal direction, and a chain roller guide is provided in the straight conveying section of the chain.

[0014] Thus, in the aforementioned patent documents, the tool port is merely inserted into or held in the chain link and rotated along the chain link to the tool changing position; no solution is proposed to increase the rotation speed of the chain link. Furthermore, no structure is specifically proposed to prevent the tool port from disengaging; only a chain roller guide is provided in Patent Document 4.

[0015] [Existing Technical Documents]

[0016] [Patent Documents]

[0017] (Patent Document 1) Korean Patent Publication No. 10-2011-0013986

[0018] (Patent Document 2) Korean Patent Publication No. 10-2012-0083639

[0019] (Patent Document 3) Korean Patent Publication No. 10-2023-0030171

[0020] (Patent Document 4) Korean Patent Publication No. 10-2023-0150615 Utility Model Content

[0021] The purpose of this invention to solve the above-mentioned problems is to provide a tool port fixing and releasing device for a machine tool magazine. This device ensures that the tool port will not detach from the gripper of the chain link when rotating at high speed along the moving path of the tool magazine or when it stops. At the same time, when the tool port stops at the tool port rotation device position for tool changing, and moves to change the tool with the spindle, the tool port can be easily separated from the gripper.

[0022] The technical solution of this utility model for solving the above-mentioned problems is as follows.

[0023] This utility model provides a tool port fixing and releasing device for a machine tool magazine. The machine tool magazine is a horizontal tool magazine, which includes chain links in the form of a wireless track and a tool port rotating device. The chain links in the form of a wireless track rotate along the moving path of the frame, and multiple chain links with C-shaped open grippers on which tool ports are installed in the vertical direction of the moving path are flexibly connected to each other. The tool port rotating device is disposed on one side of the frame and moves the tool port installed on the gripper to a position for tool changing with the machine tool spindle, or conversely, moves it from the machine tool spindle. The tool changing position of the spindle moves toward the chain links. The tool port fixing and releasing device of the machine tool magazine includes: a ring-shaped traction bolt that protrudes at a right angle relative to the length direction of the tool port and is fixed to one side of the main body of the tool port; a tool port fixing device disposed on each link constituting the chain links and fixing the traction bolt to prevent it from disengaging from the gripper; and a tool port releasing device disposed on one side of the frame of the tool magazine and moving forward and backward in a manner that releases the traction bolt of the tool port from the tool port fixing device.

[0024] The front end of one side of the traction bolt is formed by a fastening part that is fastened and fixed to the main body of the tool port, and the front end of the other side is formed with a recess of a specified length and a diameter smaller than that of the peripheral part, followed by a large diameter part that is relatively larger than the diameter of the recess.

[0025] Among them, a second large-diameter portion with the same diameter as the large-diameter portion is formed between the fastening portion and the recess of the traction bolt.

[0026] The tool port fixing device includes a cylindrical insertion hole located at the center of the chain link into which the traction bolt can be inserted, and a cylindrical cylinder hole located on one side of the chain link in a direction intersecting the length direction relative to the insertion hole. The cylinder hole and the insertion hole are formed in such a way that a portion of their diameters overlap and intersect each other. A fixing pin that can be movably inserted is provided in the cylinder hole, and one front end of the fixing pin protrudes outward from the side of the chain link, while the other front end has a large diameter portion that can slide inward from the end portion, and a small diameter portion with a diameter smaller than that of the large diameter portion.

[0027] The fixing pin forms another large-diameter portion in front of the small-diameter portion, which has the same diameter as the large-diameter portion.

[0028] The large-diameter portion of the fixing pin is formed such that when the traction bolt is inserted into the insertion hole of the chain link and they intersect, it forms a fine gap in the tangential direction with the recess of the traction bolt, thus allowing them to intersect but not with the large-diameter portion of the traction bolt. The small-diameter portion of the fixing pin is formed such that when the traction bolt at the tool port is inserted into the insertion hole of the chain link and they intersect, the large-diameter portion and the recess of the traction bolt can pass through.

[0029] The cylinder bores are formed in pairs on both sides in a parallel direction, separated by the insertion hole, and the fixing pins inserted into the cylinder bores are also formed in pairs.

[0030] A spring is provided on the bottom surface of the cylinder bore to pressurize the fixing pin on the outside of the chain link.

[0031] The tool port release device includes a pressure cylinder disposed on the frame. When the tool port held by the gripper reaches a position aligned with the tool port rotation device for tool replacement, the pressure cylinder applies pressure to the front end of the fixing pin of the tool port fixing device in a manner that releases the traction bolt of the tool port.

[0032] The pressurizing cylinder includes a piston rod that extends and retracts via compressed air, thereby pressurizing the fixing pin.

[0033] The effects of this utility model are as follows.

[0034] This invention enables the tool port of the tool magazine to remain detached from the gripper of the chain link when rotating at high speed along the moving path or when stopped, and to easily detach from the gripper when moving to change tools with the spindle after stopping at the tool port rotation device position. This shortens tool change time, improves machine tool productivity, simplifies the structure of the tool magazine, and reduces manufacturing costs. Attached Figure Description

[0035] Figure 1 This is a perspective view of a horizontal tool magazine with a tool port rotation method according to an embodiment of the present invention.

[0036] Figure 2 This is a perspective view of a tool port rotating device disposed on one side of a tool library frame according to an embodiment of the present invention, showing the tool port in the state of being located in a chain link.

[0037] Figure 3 This is a perspective view of a tool port rotating device located on one side of the tool magazine frame according to an embodiment of the present invention, showing the tool port in the position where it is used for tool changing with the spindle.

[0038] Figure 4 This is a perspective view of the tool port of an embodiment of the present invention.

[0039] Figure 5 This is a cross-sectional view of a traction bolt disposed on one side of the tool port, according to an embodiment of the present invention.

[0040] Figure 6 This is a perspective view of the chain links constituting the chain links of an embodiment of the present invention.

[0041] Figure 7 This is a perspective view of the tool port of this utility model being held in a chain link including a gripper, and is shown in the state of being released from the tool port fixing device.

[0042] Figure 8 This is a perspective view of an embodiment of the present invention, showing the tool port fixed to a tool port fixing device in a state held by a link including a claw.

[0043] Figure 9 This is a perspective view of the tool port fixing pin according to an embodiment of the present invention.

[0044] Figure 10This is a partial perspective view of a tool library equipped with a tool port release device, according to an embodiment of the present invention.

[0045] Figure 11 This is a cross-sectional view of the tool port release device of an embodiment of the present invention, showing the state of the tool port fixing device.

[0046] Figure 12 This is a cross-sectional view of the tool port release device in an embodiment of the present invention, showing the state of the tool port fixing device being released.

[0047] Figure Labels

[0048] 10: Frame, 11: Movement path, 12: Sprocket, 20: Chain link, 21: Link, 22: Gripper, 23: Insertion hole, 30: Tool port rotating device, 31: Guide plate, 40: Tool port, 41: Tool insertion port, 42: Tool, 43: Traction bolt, 431: Fastening part, 432: Recess, 433: Large diameter part, 50: Tool port fixing device, 52: Cylinder hole, 53: Spring, 54: Fixing pin, 541: Large diameter part, 542: Small diameter part, 60: Tool port release device, 61: Pressure cylinder, 62: Piston connecting rod, 63: Pressure plate. Detailed Implementation

[0049] The following reference Figures 1 to 12 The preferred embodiments of this utility model will be described below.

[0050] Reference Figure 1 In this embodiment of the tool library, the chain links 20 rotate along a movement path 11 on a frame 10 formed in the vertical direction in an infinite track manner. It is a horizontal tool library in which the tools 42 and tool ports 40 are housed together in the grippers 22 of the chain links 20 in the vertical direction of the movement path 11. That is, the tool ports 40, which house the tools 42, are perpendicular to the movement path 11 set in the vertical direction and are horizontal relative to the ground.

[0051] Furthermore, the chain links 20 are configured as a wireless track in which multiple links 21 of a gripper 22, which are open in the outward direction in the horizontal direction and can be bent and connected to each other.

[0052] In addition, a tool port rotating device 30 is provided on one side of the frame 10. The tool port rotating device 30 is used to move the tool port 40 of the gripper 22 installed on the chain link 20 to the tool changing position in order to change the tool with the machine tool spindle (not shown), or conversely, to move from the tool changing position of the spindle toward the chain link 20.

[0053] The chain link 20 meshes with the sprocket 12 rotated by the tool magazine motor (not shown) and rotates along the moving path 11 formed on the frame 10, moving the tool port 40 housed in the gripper 22 to a position aligned with the tool port rotating device 30 provided on the frame 10.

[0054] In addition, a tool port fixing device 50 is provided on each link 21 constituting the chain link 20 to fix the tool port 40 held on the gripper 22 and prevent it from detaching from the gripper 22.

[0055] On the other hand, a tool port release device 60 is provided on one side of the tool magazine frame 10 where the tool port rotation device 30 is provided, which moves forward and backward in such a way as to release the tool port 40 from the tool port fixing device 50.

[0056] In addition, refer to Figure 2 , Figure 3 The tool port rotating device 30 is a channel with horizontal movement space towards the tool changing position of the spindle. It has an upper and lower pair of guide plates 31 to guide the movement of the tool port 40, and a fixing cylinder is provided on the upper side of one side of the guide plate 31. The fixing cylinder fixes the tool port 40 to the position for tool changing with the spindle by extending and retracting the cylinder.

[0057] In addition, refer to Figure 4 , Figure 5 The tool port 40 has a tool insertion port 41 for inserting and installing a tool 42 on one side of its length direction, and a traction bolt 43 in the shape of a ring rod protruding at a right angle relative to the length direction of the tool port 40 is provided on one side of the main body.

[0058] The traction bolt 43 is in the shape of a ring rod. One front end is formed by a fastening part 431 that is fastened and fixed to the main body of the tool port 40. The other front end has a recess 432 with a specified length and a diameter smaller than that of the peripheral part. Then, a large diameter part 433 with a diameter relatively larger than that of the recess 432 is formed.

[0059] Preferably, another large-diameter portion 433 with the same diameter as the large-diameter portion 433 is formed between the fastening portion 431 and the recess 432 of the traction bolt 43.

[0060] When the traction bolt 43 is inserted into or removed from the insertion hole 23 of the link 21, the large diameter portion 433 allows it to slide stably in the horizontal direction within the insertion hole 23.

[0061] On the other hand, refer to Figures 6 to 9The tool port fixing device 50 is provided in each link 21 constituting the chain link 20. A cylindrical insertion hole 23 is formed in the center of each link 21, allowing the traction bolt 43 to be inserted in the same direction as the traction bolt 43 fixed to the tool port 40. A cylindrical cylinder hole 52 is formed on one side of the link 21 in a direction intersecting the length direction of the insertion hole 23 into which the traction bolt 43 is inserted. The cylinder hole 52 and the insertion hole 23 are formed in such a way that a portion of their diameters overlaps and intersects. That is, the overlapping and intersecting portions of the cylinder hole 52 and the insertion hole 23 are interconnected.

[0062] In addition, such as Figure 9 As shown, the tool port fixing device 50 has a fixing pin 54 that can be movably inserted into the cylinder bore 52, and one front end of the fixing pin 54 protrudes outward from the side of the chain link 21, and the other front end has a large diameter portion 541 with a diameter that can slide with the cylinder bore 52 and a small diameter portion 542 with a diameter smaller than that of the large diameter portion 541, formed from the end portion inward.

[0063] Preferably, the fixing pin 54 forms another large-diameter portion 541 with the same diameter as the large-diameter portion 541 in front of the small-diameter portion 542.

[0064] Therefore, the other front end of the fixing pin 54 has a structure in which a small diameter portion 542 is formed in the middle part in the length direction, and a large diameter portion 541 is formed on both sides of the small diameter portion 542.

[0065] The large diameter portion 541 of the retaining pin 54 allows the retaining pin 54 to slide stably in the horizontal direction when it moves in and out of the cylinder bore 52.

[0066] On the other hand, the large-diameter portion 541 of the fixing pin 54 is formed with a diameter that forms a fine gap in the tangential direction with the recess 432 of the traction bolt 43 when the traction bolt 43 is inserted into the insertion hole 23 of the chain link 21 and intersects with each other, so that it can intersect but cannot intersect with the large-diameter portion 433 of the traction bolt 43.

[0067] Furthermore, the small-diameter portion 542 of the fixing pin 54 has a relatively smaller diameter than the large-diameter portion 541, and is formed to have a diameter that allows the large-diameter portion 433 and the recess 432 of the traction bolt 43 to pass through when the traction bolt 43 of the tool port 40 is inserted into the insertion hole 23 and crosses each other.

[0068] Therefore, when the large-diameter portion 541 of the fixing pin 54 is intersected and engaged with the recess 432 of the traction bolt 43 inserted into the insertion hole 23 of the chain link 21, the large-diameter portion 433 of the traction bolt 43 is suppressed by the large-diameter portion 541 of the fixing pin 54 and cannot disengage from the insertion hole 23 of the chain link 21, thereby fixing the tool port 40 to the tool port fixing device 50.

[0069] Conversely, even if the small-diameter portion 542 of the retaining pin 54 intersects with the recess 432 or the large-diameter portion 433 of the traction bolt 43 inserted into the insertion hole 23 of the link 21, since they do not contact each other, the traction bolt 43 can be disengaged from the insertion hole 23, so that the tool port 40 can be separated from the tool port fixing device 50.

[0070] On the other hand, preferably, the cylinder bore 52 is formed in pairs on both sides in a parallel direction, with the insertion hole 23 formed on the chain link 21 as a gap, and the fixing pin 54 inserted into the cylinder bore 52 is also formed in pairs.

[0071] Furthermore, a spring 53 is provided on the bottom surface of the cylinder bore 52 to press against the retaining pin 54 on the outside of the chain link 21. Unless the retaining pin 54 is subjected to an external force in the length direction exceeding the elastic force of the spring 53, the spring 53 presses against the pin in such a way that the large-diameter portion 541 at the front end of the retaining pin 54 moves to a position intersecting with the recess 432 of the traction bolt 43.

[0072] On the other hand, refer to Figures 10 to 12 The tool port release device 60 includes a pressure cylinder 61, which is disposed on one side of the tool magazine frame 10 on which the tool port rotation device 30 is provided. When the tool port 40 held by the gripper 22 reaches the position aligned with the tool port rotation device 30 for tool replacement, pressure is applied to the front end of the protruding fixing pin 54 of the tool port fixing device 50.

[0073] The pressurizing cylinder 61 includes a piston rod 62, which extends and retracts by compressed air to pressurize the fixing pin 54. Preferably, a pressure plate 63 for pressurizing the fixing pin 54 is provided at the front end of the piston rod 62.

[0074] The following reference Figure 11 , Figure 12 The operation process of the tool port 40 fixing device of the machine tool library of the present invention, as configured in the above embodiments, will be described.

[0075] The tool port 40, in which a tool 42 is inserted horizontally in the grippers 22 provided on each link 21 of the chain link 20 which rotates in an infinite track manner along the movement path 11 formed on the tool library frame 10, is aligned and stopped at the position provided with the tool port rotation device 30, which serves as the tool changing position, by the rotating sprocket 12 according to the instructions of the control device (not shown).

[0076] Thus, before the tool port 40 rotates along the movement path 11 or stops at the position where the tool port rotating device 30 is provided, while the tool port 40 holding the gripper 22 of each chain link 21 is inserted into the insertion hole 23 of the chain link 21, the large diameter portion 541 of the fixing pin 54, which is pressed and moved in the outward direction of the chain link 21 by the spring 53 at the bottom of the cylinder hole 52 of the tool port fixing device 50, is in a state of intersecting with the recess 432 of the traction bolt 43, and the large diameter portion 433 of the traction bolt 43 is in a state of being blocked by the large diameter portion 541 of the fixing pin 54, so that the tool port 40 is fixed to prevent it from disengaging from the gripper 22.

[0077] On the other hand, when the tool port 40 is aligned with the position where the tool port rotating device 30 is provided, the pressure cylinder 61 of the tool port release device 60 is activated according to the instruction of the control device, the piston rod 62 of the pressure cylinder moves forward, so that the pressure plate 63 provided at the front end applies pressure to the fixing pin 54 of the tool port fixing device 50.

[0078] As the piston rod 62 of the pressurized cylinder advances, the retaining pin 54 pushes back against the elastic force of the spring 53 at the bottom of the cylinder bore 52.

[0079] At this time, the large-diameter portion 541 of the fixing pin 54 retracts while intersecting with the recess 432 of the traction bolt 43, so that the small-diameter portion 542 is in a state of intersecting with the large-diameter portion 433 of the traction bolt 43. Since the small-diameter portion 542 of the fixing pin 54 has a small diameter, even if it intersects with the large-diameter portion 433 of the traction bolt 43, it will not hinder the movement of the large-diameter portion 433 of the traction bolt 43. Therefore, the traction bolt 43 is in a state where it can be dislodged from the insertion hole 23 of the chain link 21.

[0080] Thus, the tool port 40, from which the traction bolt 43 disengages from the insertion hole 23 of the chain link 21, is guided by a transfer device (not shown) of the tool port 40 located on one side of the tool port rotating device 30 to the guide plate 31 of the tool port rotating device 30 and moved to the position for tool replacement with the machine tool spindle.

[0081] As described in the above embodiments, in this utility model, when the tool port 40 of the tool magazine rotates at high speed along the moving path 11 or stops suddenly, it will not disengage from the gripper 22 of the chain link 20. At the same time, after stopping at the tool port rotating device 30 position for tool changing, it can easily separate from the gripper when moving to change tools with the spindle. This can shorten the tool changing time, thereby improving the productivity of the machine tool, and further simplifying the structure of the tool magazine and reducing manufacturing costs.

Claims

1. A tool port fixing and releasing device for a machine tool magazine, wherein the machine tool magazine is a horizontal tool magazine, comprising chain links in the form of a wireless track and a tool port rotating device, the chain links in the form of a wireless track rotating along a moving path of a frame, and multiple chain links having C-shaped open grippers with tool ports mounted in the vertical direction of the moving path are flexibly connected to each other, the tool port rotating device being disposed on one side of the frame, and moving the tool port mounted on the gripper to a position for tool changing with the machine tool spindle, or conversely, moving from the tool changing position of the spindle towards the chain links, characterized in that, have: A ring-shaped traction bolt protrudes at a right angle relative to the length direction of the tool port and is fixed to one side of the main body of the tool port; A tool port fixing device is provided at each link constituting the chain link and secures the traction bolt to prevent it from disengaging from the gripper; as well as A tool port release device is provided on one side of the tool magazine frame and moves forward and backward in a manner that releases the traction bolt of the tool port from the tool port fixing device.

2. The tool port fixing and releasing device for the machine tool magazine according to claim 1, characterized in that, One front end of the traction bolt is formed by a fastening part that is fastened and fixed to the main body of the tool port, and the other front end is formed with a recess of a specified length and a diameter smaller than that of the peripheral part, followed by a large diameter part that is relatively larger than the diameter of the recess.

3. The tool port fixing and releasing device for the machine tool magazine according to claim 2, characterized in that, Another large-diameter portion with the same diameter as the large-diameter portion is formed between the fastening portion and the recess of the traction bolt.

4. The tool port fixing and releasing device for the machine tool magazine according to claim 1, characterized in that, The tool port fixing device includes a cylindrical insertion hole located at the center of the chain link into which the traction bolt can be inserted, and a cylindrical cylinder hole located on one side of the chain link, formed in a direction intersecting the length direction relative to the insertion hole. The cylinder hole and the insertion hole are formed in such a way that a portion of their diameters overlap and intersect each other. A fixing pin that can be movably inserted is provided in the cylinder hole. One end of the fixing pin protrudes outward from the side of the chain link, and the other end has a large diameter portion that can slide with the cylinder bore and a small diameter portion with a smaller diameter than the large diameter portion, which are formed from the end portion inward.

5. The tool port fixing and releasing device for the machine tool magazine according to claim 4, characterized in that, The fixing pin forms another large-diameter portion in front of the small-diameter portion, which has the same diameter as the large-diameter portion.

6. The tool port fixing and releasing device for the machine tool magazine according to claim 4, characterized in that, The large-diameter portion of the retaining pin is formed such that when the traction bolt is inserted into the insertion hole of the chain link and they intersect, it forms a fine gap in the tangential direction with the recess of the traction bolt, thus allowing them to intersect but not with the large-diameter portion of the traction bolt. The small-diameter portion of the fixing pin is formed to have a diameter such that when the traction bolt at the tool port is inserted into the insertion hole of the chain link and crosses each other, the large-diameter portion and the recess of the traction bolt can pass through.

7. The tool port fixing and releasing device for the machine tool magazine according to claim 4, characterized in that, The cylinder bores are formed in pairs on both sides in a parallel direction, separated by the insertion hole, and the retaining pins inserted into the cylinder bores are also formed in pairs.

8. The tool port fixing and releasing device for the machine tool magazine according to claim 4, characterized in that, A spring is provided on the bottom surface of the cylinder bore to apply pressure to the fixing pin on the outside of the chain link.

9. The tool port fixing and releasing device for a machine tool magazine according to claim 1, characterized in that, The tool port release device includes a pressure cylinder disposed on the frame, which applies pressure to the front end of the fixing pin of the tool port fixing device in order to release the traction bolt of the tool port when the tool port held by the gripper reaches the position aligned with the tool port rotation device for tool replacement.

10. The tool port fixing and releasing device for a machine tool magazine according to claim 9, characterized in that, The pressurizing cylinder has a piston rod that extends and retracts by compressed air and pressurizes the fixing pin.

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