JPS6055255B2 - Automatic exchange device for tool storage magazine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The purpose of the present invention is to compensate for the shortage of tools in a tool storage magazine in a machine tool equipped with an automatic tool changer, or to compensate for the shortage of tools in a tool storage magazine, or when machining many types of workpieces with one machine tool. This invention relates to an automatic exchange device for tool storage magazines that automatically and quickly exchanges tool storage magazines for the purpose of shortening tool setup time.

The purpose of the present invention is to firmly and reliably fix a tool storage magazine to the machine tool body when it is carried into the machine tool body, and to release the clamp and fix the magazine tool when carrying the magazine out of the machine tool body. To provide an automatic exchange device for a tool storage magazine configured to prevent the rotation of the magazine and to allow smooth unloading.

According to the structure of the present invention, a single drive source is used to clamp and unclamp the magazine, and furthermore, the rotation of the drive source for the magazine rotating body is also prevented.

In other words, the clamper installed on the machine tool body side moves up and down to securely clamp the magazine when it is on the machine tool body side, and when unloading, the clamper engages the joint that engages with the magazine rotating body. By stopping the magazine, safety is taken into consideration to prevent the magazine from accidentally rotating during loading and unloading. In addition, the configuration in which one clamper 1 is used for clamping and unclamping automatically releases the rotation block when clamping, allowing the magazine to rotate, and locks the magazine to the joint when unclamping. Rotation of the drive source is automatically prevented, ensuring mechanically reliable operation, and the direction of the joint is always maintained at a constant position during loading and unloading to prevent accidents due to malfunction. ing. An embodiment of the automatic tool storage magazine changing device of the present invention will be described in detail below.

1 to 8 show an embodiment in which the present invention is applied to a machine tool of the type that is a horizontal machining center and has a tool storage magazine above the spindle. The installation location of the tool storage magazine is on the machine tool body side for the purpose of explanation, but
The top of the column, the side of the column, or a separate type may be selected depending on conditions such as the type of machine or the number of tools, and is not limited to the embodiments of the present invention. The embodiment is an example in which one spare tool storage magazine is provided on the magazine storage stand. As shown in FIGS. 1 and 2, a table 3 is slidably placed on two table guide surfaces 2A and 2B formed horizontally on the bed 1.
An indexing table 4 is placed on the table 3 and can be rotated and indexed about a vertical central axis.

A screw 6 rotated by a motor 5 attached to the side of the bed 1 moves the table 3 onto the table guide surface 2.
It is made to slide back and forth along A and 2B. A column 8 is slidably mounted on two column guide surfaces 7A, 7B formed horizontally on the bed 1 in a direction orthogonal to the table guide surfaces 2A, 2B. A screw 10 rotated by a motor 9 attached to the side surface of the bed 1 causes the column 8 to reciprocate and slide along the column guide surfaces 7A, 7B. Two vertical spindle head guide surfaces 11A and 11B are formed on the side surface of the column 8, and the spindle head 12 can slide vertically on the spindle head guide surfaces 11A and 11B.
is supported by

A screw 14 rotated by a motor 13 mounted on the upper surface of the column 8 causes the spindle head 12 to vertically reciprocate along the spindle head guide surfaces 11A and 11B.
A main shaft 15 is rotatably supported on the main shaft head 12 about a horizontal rotation center axis parallel to the sliding direction of the table 3. The main shaft 15 is provided with a tool insertion hole for removably attaching a tool shank, and a clamp device for pulling and fixing the tool shank attached to the tool insertion hole into the tool insertion hole. There is. A magazine support stand 16 is fixed to the upper surface of the spindle head 12, and a magazine A is placed on the upper surface 16A of the magazine support stand 16.

The magazine A can be lightly slid on the upper surface 16A of the magazine support stand 16 in a direction parallel to the spindle axis by means of a linear roller bearing 18 attached to the lower surface of the base 17 of the magazine A, as shown in FIG. and as shown in Figure 2,
After being carried onto the magazine support stand 16, it is fixed to the magazine support stand 16. Tool sockets 19A (for large diameter tools) and 19B (for small diameter tools) installed in magazine A are
Two sprocket wheels 20A12 as described below
It is detachably attached to a chain 21 wound around 0B in a closed loop shape. A tool socket transfer device 22 is provided at the front of the upper surface of the magazine support stand 16 and rotates between a vertical position and a horizontal position (parallel to the spindle axis) around a horizontal axis perpendicular to the spindle axis. There is. The tool socket and transport device 22 removes the tool socket indexed to the tool socket attachment/detachment position of magazine A (X position in Figure 2) from the chain 21, and pivots to the slightly tilted position shown in Figure 1. When machining with the tool attached to the spindle 15 is completed, the spindle 15 rotates to a tool change position parallel to the spindle axis. A tool exchange arm 23 is provided on the front surface of the magazine support base 16 between the tool socket conveyance device 22 and the main spindle 15, and is pivotable about an axis parallel to the main spindle axis and can move in and out in the direction of the main spindle axis. There is. The tool exchange arm 23 grips the tool carried by the tool socket conveyance device 22 and the tool mounted on the main shaft 15 by means of openable and closable tool gripping claws 23A and 23B provided at both ends thereof.
Move forward parallel to the spindle axis and pull out both tools, then 18
After turning 0 degrees, move back parallel to the spindle axis and exchange both tools. A base 25 of a magazine storage stand 24 is erected behind the bed 1, and a rectangular table 26 is attached to the base 25.

A spare magazine B, which has the same structure as the magazine A but has a different arrangement of tool sockets, is placed on the table 26. 1 and 2 show a state in which the column 8 and the spindle head 12 are positioned at a position to carry out the magazine A to the magazine storage stand 24. FIG. Next, the structures of the magazines A, B and the magazine support stand 16 will be explained in detail.

Since the magazines A and B have exactly the same structure, only the magazine A placed on the magazine support stand 16 will be described. As shown in FIGS. 3 and 4, three linear roller bearings 18 are attached to the bottom surface of the base 17 of the magazine A on the left and right sides, and the entire magazine A runs on the top surface 16A of the magazine support stand 16 on the main shaft. It can be lightly slid in a direction parallel to the axis. In addition, at the center of the upper surface of the magazine support stand 16, a square guide plate 27 is provided which extends parallel to the main shaft axis by approximately the length of the base 17 in the main shaft axis direction.
is installed. A guide groove 28 parallel to the main shaft axis is formed on the lower surface of the base 17 and closely fits with the guide plate 27. When the magazine A is carried onto the magazine support stand 16, the guide groove 28 of the base 17 is formed. It fits into the guide plate 27 to position the magazine A parallel to the spindle axis. A support shaft 29 is erected on the front upper surface of the base 17, and a sprocket wheel 20A is rotatably supported on the support shaft 29 by bearings 30A and 30B.

Further, on the rear side of the base 17, a rotating shaft 32 is rotatably supported by bearings 31A and 31B, and a sprocket wheel 20B is keyed to the rotating shaft 32. A chain 21 is wound around the two sprocket wheels 20A and 120B in a closed loop in two stages, upper and lower, and the hook pieces 34 of the tool sockets 19A and 19B engage with each head of the chain pin 33 of the chain 21. ,
A large number of tool sockets 19A, 19 are provided around the chain 21.
B is removably held, and the tool holding interval can be changed in units of link pitches depending on the type of tool inserted into the tool socket. Next, the positioning means, which is a magazine rotation prevention means for preventing the rotational position of the magazine from shifting when replacing the magazine, and for accurately indexing and positioning the magazine, will be described in detail.

A casing 35 is attached to the rear of the sprocket wheel 20A on the base 17, and a positioning pin 36 can slide in a small diameter guide hole 35A drilled in the casing 35 parallel to the spindle axis. is inserted into. The large diameter portion 36A of the positioning pin 36 is inserted into the large diameter hole 35B that is drilled concentrically with the small diameter guide hole 35A, and the positioning pin 36 is always urged in the projecting direction by the compression spring 37, and the positioning pin 36 is The tip of the pin 36 enters the teeth of the sprocket wheel 20A to prevent the sprocket wheel 20A from rotating. As shown in FIG. 3-A and FIG. 3-B, the lower part of the casing 35 is
A pivot 38 is pivotally supported, and a lever 39 facing the large diameter hole 35B is provided at the upper end of the pivot 38.

A pin 39A that protrudes upward is provided at the tip of the lever 39, and the pin 39A is fitted into a groove 36B formed in the large diameter portion 36A of the positioning pin 36. Also, the axis 38
A lever 40 that is perpendicular to the lever 39 is provided at the lower end of the lever 39, and a pin 40A that projects downward from the base 17 is provided at the tip of the lever 40. Next, the second release means that extracts the above-mentioned positioning pin 36 from the teeth of the sprocket wheel 20A and enables rotational indexing of the magazine will be described in detail. A cylinder 41 is attached to the front lower surface of the magazine support stand 16, and a piston rod 42A of a piston 42 is fitted into the cylinder 41 so as to be slidable in a direction perpendicular to the main shaft axis. An engagement member 43 is provided that protrudes from the upper surface, and an engagement groove 43A having the same width as the diameter of the pin 40A is formed in the upper surface of the engagement member 43 in parallel to the main shaft axis.
When the magazine A is carried onto the magazine support stand 16 when the piston 42 is at the backward end, the pin 40A fits into the engagement groove 43A, and when the piston 42 is moved forward in this state, the levers 40 and 39 are moved. It pivots clockwise and retreats the positioning pin 36 against the compression spring 37, and the tip of the positioning pin 36 comes out of the teeth of the sprocket wheel 20A, allowing rotational indexing of the magazine. To check the forward end and backward end of the piston 42, check the cylinder 41
The dogs D-1 and D-2 attached to the piston rod 42B protruding rearward from the limit switch LS-
1 and? -2. Next, the drive source for indexing the magazine and the tool calling device will be described in detail.

A motor 44 is attached to the rear lower surface of the magazine support stand 16, and a clutch 45 is attached to the output shaft 44A of the motor 44.
is locked. The clutch 45 is rotatably supported on the magazine support base 16 by a bearing 46 .
As shown in FIG. 3-A and FIG. 3-C, the clutch 45
Two parallel latch claws 47A and 47B are formed on the top surface of the magazine support base 16 to protrude from the top surface. Further, a clutch pawl 47 is provided at the lower end of the rotating shaft 32.
A clutch pawl 48 is provided to protrude downward from the base 17 and tightly fits into the clutch groove 47C between the clutch grooves 47A and 47B. When the motor 44 is rotated and the magazine A is called to its original position, the clutch pawls 47A and 47B are positioned parallel to the main shaft axis as shown in FIG. 16, the clutch pawl 48 is removed from the clutch pawls 47A, 47B. Further, after this, when the spare magazine B is carried onto the magazine support stand 16, the clutch pawl 48 of the magazine B is
The clutch grooves 47C of the clutch pawls 47A and 47B are smoothly fitted, and the rotation of the motor 44 can be transmitted to the rotating shaft 32 of the magazine B. Further, on the outer periphery of the clutch 45, positioning grooves 49 are provided on the opposite side of the clutch pawls 47A, 47B.
is formed, and when the magazine clamp lever 50, which will be described later, is in an unclamped state, the tip of the clamp lever 50 gets stuck in the positioning groove 49, and the clutch 45 is prevented from turning due to shock when replacing the magazine, etc. Position. A gear 51 is formed on the outer periphery of the lower end of the clutch 45, and meshes with a gear 53 keyed to an input shaft 52A of a tool calling device (encoder) 52 attached to the rear lower surface of the magazine support 16.

The gear 53 of the encoder 52 is set at a gear ratio such that it rotates exactly once for each rotation of the magazine. In the embodiment of the present invention, the number of links of the chain 21 is 80, so 8 addresses are converted to 2. evolution. The signal is configured to be emitted as a w-adic electrical signal. Therefore, the tool sockets 19A and 19B attached to the chain pin 33 of the chain 21 at appropriate intervals depending on the tool are connected to the encoder 52, respectively.
There is a correspondence relationship with one of the 80 addresses. The correspondence relationship between PROM. ．． The correspondence between the address of the encoder 52 and the tool socket number is stored in a storage means such as ROM or RAM, and selection is made according to the magazine. Next, a clamp device for clamping the magazine onto the magazine support stand 16 will be described in detail.

An abutment plate 54 is fixed to the front upper surface of the magazine support stand 16 with bolts, and an inclined surface 54 is attached to the rear surface of the abutment plate 54.
A is formed. A pressing plate 55 having an inclined surface 55A complementary to the inclined surface 54A is bolted to the front lower surface of the base 17. Further, a pressing plate 56 that is pressed by a clamp lever 50 is bolted to the rear lower surface of the base 17. The clamp lever 50 is
It is pivotally supported on the magazine support stand 16 by a horizontal pivot 57 perpendicular to the main shaft axis. A cylinder 58 is attached to the lower surface of the magazine support stand 16, and a piston 59 is attached to the cylinder 58 so as to be slidable in parallel with the main shaft axis.
is inserted. An engagement member 60 having an engagement groove 60A that engages with the lower end of the clamp lever 50 is attached to a piston rod 59A that projects rearward of the piston 59, and the clamp lever 50 is pivoted by the reciprocating movement of the piston 59. urge In FIG. 3-A, the piston 59 moves back, pivots the clamp lever 50 counterclockwise, presses the pressing plate 56 forward with the tip of the clamp lever 50, and pushes the inclined surface 55A of the pressing plate 55 against the abutting plate. 54 inclined surfaces 54
This figure shows a state in which the base 17 of the magazine A is positioned and clamped against the magazine support stand 16 by strongly pressing against the base 17 of the magazine A. When the use of the magazine A is completed and the magazine A is to be carried out onto the magazine storage table 24, the piston 59 is advanced and the clamp lever 50 is pivoted clockwise, so that the clamp lever 50 separates from the pressing plate 56 and releases the clamp. At the same time, it fits into the positioning groove 49 of the clutch 45 described above and stops the clutch 45 from rotating. At this time, the upper end of the clamp lever 50 is at a position lower than the lower surfaces of the pressing plate 56 and the pressing plate 55, so there is no problem in carrying in and out the magazine. The forward end and backward end of the piston 59 can be confirmed by checking the piston rod 59 that protrudes forward from the cylinder 58.
This is done by detecting the dogs D-3 and D-4 attached to B by limit switches LS-3 and LS-4. Next, the magazine identification code and magazine detection means will be described in detail.

As shown in FIG. 4, a magazine identification dog 61 is attached to the lower surface of the magazine base 17, and when the magazine A is carried onto the magazine support 16, a dog 61 is attached to the side of the magazine support 16. The two limit switches of the magazine detection means (multi-limit switch) 62?
-One limit switch among -5 and LS-6-
5, it is detected that magazine A has been carried in, and a magazine detection signal shown in FIGS. 10 and 11, which will be described later, is generated. When the magazine B is carried onto the magazine support stand 16, the dog 61 of the magazine B is a limit switch?
Step on -6. Next, the structure of the magazine storage stand 24 will be explained in detail.

As shown in FIGS. 5 to 8, on the upper surface of the table 26 of the magazine storage stand 24, there are two guide plates 63A and 63B on the left and right sides that guide the linear roller bearings 18 on the left and right sides of the lower surface of the magazine when loading and unloading the magazine. Each magazine is attached one by one, and a spare magazine B is placed on the guide plate 63B as shown by a two-dot chain line. Four sprocket wheels 64A to 64D are rotatably supported on the table 26.
A chain 65 is wound in a closed loop around the sprocket wheels 64A to 64B in two stages, upper and lower. The chain 65 is given appropriate tension by a tension pulley 66. As shown in FIG. 8, among the four sprocket wheels 64A to 64D, 64A is a driving sprocket wheel. That is, the rotating shaft 68 rotatably supported on the table 26 by bearings 67A, 67B has a sprocket wheel 64A.
The output shaft 69A of the motor 69 attached to the lower surface of the table 26 is keyed to the rotating shaft 68, and transmits the rotation of the motor 69 to the sprocket wheel 64A. A block 71 inserted into a chain pin 70A projecting downward from the chain 65 and a block 72 inserted into a chain pin 70B projecting upward are integrally connected by a bolt 73. A roller follower 74 is rotatably mounted on the shaft 72A. As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 7-A, and FIG.
Engagement plates 75A and 75B that can be engaged with are extended rearward and attached.

Engagement grooves 76A, 76B having the same width as the outer diameter of the roller follower 74 are formed on the lower surfaces of the tips of the engagement plates 75A, 75B in a direction perpendicular to the spindle axis.
Positioning holes 77A and 77B for positioning the magazine on the magazine storage stand 24 are bored in the side surface of B. As shown in FIGS. 1 and 2, when the spindle head 12 and column 8 are positioned at the magazine unloading position by a tape command, the magazine A is unloaded.

To check the height direction of the spindle head 12, check the spindle head 1 shown in Fig. 4.
This is done by a dog D-5 attached to column 8 and a limit switch LS-7 attached to the side of column 8. Also, to check the left and right direction of the column 8, check the dog D-6 attached to the lower end of the rear face of the column 8 and the limit switch LS-8 attached to the rear face of the head 1. -9. Is dog D-6 the limit switch at the position where magazine A is loaded and unloaded? -8 is the position where you step on it, and the position where magazine B is loaded/unloaded is the limit switch of dog D-6? This is the position where you stepped on -9. At this time, the roller follower 74 is in the position shown in FIG.
2 is stopped at the position where limit switch LS-10 is pressed.

When the motor 69 is driven to move the chain 65 counterclockwise, the roller follower 74 fits into the engagement groove 76A of the engagement plate 75A of the magazine A. As shown in FIG. 5, the position where the roller follower 74 fits into the engagement groove 76A is the position where the chain 65 is wound around the sprocket wheel 64B.
4 fits in parallel to the engagement groove 76A, so the magazine A
There is almost no velocity component in the pulling direction (force parallel to the spindle axis) onto the table 26, and there is almost no velocity component in the pulling direction as the roller follower 74 enters the engagement groove 76A. gradually increases, and roller follower 7
The link marked with 4 reaches its maximum speed when it becomes parallel to the spindle axis, and after that it is pulled at a constant speed. In this way, the unloading speed of the magazine A gradually increases, so that the magazine A is transferred onto the table 26 without impact, and the linear roller bearing 18 on the lower surface of the base 17 guides the table 26 from the upper surface 16A of the magazine support stand 16. Board 6
It rolls while gradually shifting to 3A.

Just before the magazine A finishes being transferred onto the table 26,
The link with the roller follower 74 comes to a position where it meshes with the sprocket wheel 64A. Therefore, the speed component in the pulling direction of the magazine A onto the table 26 gradually decreases, and when the pulling speed reaches O, the roller follower 74 comes out of the engagement groove 76A of the magazine A, and Magazine A stops on table 26. The chain 65 continues to move counterclockwise after this,
When block 72 of roller follower 74 steps on limit switch LS-11, motor 69 stops. As shown in FIG. 5, FIG. 7-A, and FIG. 7-B, the table 26
At the top, positioning means 78A and 78B are provided directly above the sprocket wheels 64A164D, which operate in conjunction with the movement of the roller follower 74 to position and fix the magazine on the table 26.

Since the positioning means 78A and 78B have exactly the same structure, only one positioning means 78B will be explained. As shown in FIG. 7-A1 and FIG. 7-B, a block 79 is attached to the upper surface of the table 26, and a positioning pin 80 is supported on the block 79 so as to be slidable in a direction perpendicular to the spindle axis. ing. A pin 81 is vertically driven into the longitudinally intermediate portion of the positioning pin 80 , and the lower end of the pin 81 fits into a guide groove 82 formed in the block 79 in parallel with the axis of the positioning pin 80 . The rotation is stopped. Further, a pivot pin 83 is provided upright on the upper surface of the block 79, and a lever 84 is pivotally supported on the pivot pin 83. The bifurcated portion 85 on the positioning pin 80 side of the lever 84 sandwiches the pin 81 and
The width of the bifurcated portion 86 on the opposite side of 4 is formed to be the same as the outer diameter dimension of the roller follower 74. A steel ball 89 is inserted into a hole 87 vertically bored in the lever 84 and is pressed vertically downward by a spring 88 . The block 79 has notches 90A and 9 into which the steel balls 89 fit.
0B is formed, and a steel ball 8 is formed at each pivot axis of the lever 84.
9 fits into the notches 90A and 90B, thereby positioning the lever 84 at each pivot end. FIG. 7-A shows a state in which the positioning pin 80 is fitted into the positioning hole 77B of the magazine B, and the magazine B is positioned on the table 26. When the chain 65 is moved counterclockwise in order to carry the magazine B from the table 26 onto the magazine support stand 16 of the machine tool, the roller follower 74 moves between the forks of the lever 84 as shown in FIG. 7-A. 86 and pivot the lever 84 counterclockwise to pull out the positioning pin 80 from the positioning hole 77B. When the lever 84 pivots to the position shown by the two-dot chain line, the positioning pin 80 completely comes out of the positioning hole 77B, the magazine A becomes movable, and the roller follower 74 moves to the position shown by the lever 8.
It comes off from the forked part 86 of 4.

At this time, the steel ball 89 fits into the notch 90B and positions the lever 84 on the block 79. When the positioning of the lever 84 is completed, the roller follower 74 is moved to the magazine B.
The chain 65 fits into the engagement groove 76B and pushes the magazine B out of the table 26 while gradually accelerating it.On the other hand, when pulling the magazine B onto the table 26, the chain 65 moves clockwise. Then, pull the magazine B onto the table 26, gradually decelerate near the end, and pull out the roller follower 74 from the engagement groove 76B when the speed is O.Next, the roller follower 74 is moved to the position indicated by the two-dot chain line. Enter the bifurcated part 86 of the lever 84 located at the lever 8
4 clockwise and insert the positioning pin 80 into the positioning hole 77B. Roller follower 74 is lever 8
4, the positioning pin 80 completely fits into the positioning hole 77B, and the magazine B
is positioned on the table 26. At this time, lever 84
The steel ball 89 fits into the notch 90A and positions the lever 84 in the block 79. Therefore, even when the magazine A is pulled onto the table 26 as described above, the roller follower 74 acts on the positioning means 78A at the final position of the pulling and pulls the magazine A onto the table 26. Determine the position. As mentioned above, when the magazine AO) unloading operation is completed and the limit switch LS-11 is stepped on, the column 8 moves to the position where magazine B is loaded onto the magazine support stand 16 according to the tape command, and the column 8 moves to the position where magazine B is loaded onto the magazine support stand 16,
-6 is a limit switch? In response to the confirmation signal from stepping on -9, the loading operation of magazine B is started.

That is, the motor 69 is driven to move the chain 65 counterclockwise, and as described above, the first roller follower 7
4 acts on the positioning means 78B, and the positioning pin 80
is pulled out from the positioning hole 77B of the magazine B, and then the roller follower 74 is fitted into the engagement groove 76B, and the magazine B is pushed out from the table 26 while gradually accelerating and carried onto the upper surface 16A of the magazine support stand 16. Near the end of loading, the link with the roller follower 74 engages with the sprocket wheel 64C, so the loading speed of magazine B is gradually reduced, and at the position where loading of magazine B is completed, the loading speed of magazine B is 0. become,
The roller follower 74 is disengaged from the engagement groove 76B of the magazine B. The chain 65 continues to move counterclockwise after this, and when the block 72 of the roller follower 74 steps on the limit switch LS-]2, the motor 69 stops. The loading/unloading operation of the magazine is now complete, and after clamping the magazine B with the clamp lever 50 mentioned above on the magazine support stand 16, the machine tool moves to the position where the next machining will be performed and stores it in the magazine B. Perform machining using the tool provided.

The above-mentioned mechanism for exchanging magazines between the machine tool body and the magazine storage table is not only for exchanging magazines.
It is also effective to use other exchange mechanisms, such as pallet changers.

As mentioned above, the magazine is provided with a magazine rotation blocking means in order to prevent the rotation index position of the magazine from shifting when the magazine is carried in and out.
4 is provided with a first release means for releasing the magazine rotation blocking means in order to freely index the magazine drawn onto the magazine storage stand 24 and exchange old and new tools.

As shown in FIG. 5, FIG. 6-A, and FIG. 6-B, a first release means 91A for magazine A and a first release means 91A for magazine B are provided on the left and right sides of the table 26 of the magazine storage stand 24. 1
A release means 91B is provided.

Since the first release means 91A and 91B have almost the same structure, the first release means 91A shown in FIGS. 6A and 6B will be described in detail. table 26
A pivot shaft 92 is pivotally supported on the table 26, and a manual lever 93 protruding from the side surface of the table 26 is attached to the lower end of the pivot shaft 92. The manual lever 93 has a tension spring 94
A lever 95 is attached to the upper end of the pivot shaft 92. As mentioned above, the positioning pin 3 shown in FIG. 3-A1 and FIG. 3-B is a magazine rotation preventing means and a magazine positioning means.
6 is a compression spring 37 that keeps the sprocket wheel 2
It enters into the teeth of 0A and prevents rotation of the magazine, and the structure is such that the magazine cannot be rotated at any time, not only during the movement of loading and unloading the magazine, but also after the magazine is drawn into the table 26.

As mentioned above, after the use with the machine tool is completed, the magazine A
When the magazine B is pulled onto the table 26 and the magazine B is carried into the machine tool body, it is necessary to replace the worn out tools stored in the magazine A or change the tool socket arrangement, so the manual lever described above must be replaced. 93 and rotate the magazine A by hand to exchange tools. That is, as shown in FIG. 6-1B, the manual lever 9
3 clockwise, the lever 95 will move the positioning pin 3
The levers 40 and 39 pivot clockwise against the pin 40A of the lever 40 on the 6 side and move the positioning pin 36 backward against the compression spring 37, so that the tip of the positioning pin 36 is removed from the teeth of the sprocket wheel 20A. slipped out,
Since the magazine can be rotated, after turning the magazine A by hand and indexing the tool socket that needs to be replaced to a position where it can be easily replaced, let go of the manual lever 93. The manual lever 93 and the lever 95 return to their original positions, and the positioning pin 36 enters the teeth of the sprocket wheel 20A again by the spring force of the compression spring 37.
Prevents rotation of magazine A. In this state, replace the tool or tool socket that has been indexed to a position where it can be easily replaced, and repeat the above-described replacement operation to complete the replacement of all tools that require replacement. In order to align the index position of magazine A
index to the original position, release the manual lever 93, and insert the positioning pin 36 into the teeth of the sprocket wheel 20A to prevent rotation of the magazine A and prepare for the next magazine A replacement operation. . Regarding magazine B,
As in the case of magazine A, the above-described tool exchange operation can be performed. In the embodiment described above, the first release means 91A, 91B are operated manually, but they can also be operated automatically using a power drive source. Figure 9 shows
1 is a hydraulic circuit diagram for operating the automatic tool storage magazine exchange device of the present invention.

The motor 69 is rotated in forward and reverse directions by solenoid valves 96 in four boats and three positions, and drives the chain 65 when loading and unloading the magazine. The chain 65 is stopped by turning the solenoid valve 96 into a neutral boat block and stopping the motor 69.
The reciprocating movement of the piston 59 that operates the clamp lever 50 is performed by switching the solenoid valve 97 at 4 boats and 2 positions. In order to clean the sloped surfaces 54A and 55A of the abutment plate 54 and the abutment plate 55 that are in close contact with each other when the magazine is carried onto the magazine support stand 16, an air nozzle 98 is provided in the abutment plate 54 and opens on the sloped surface 54A. By switching a solenoid valve 99 in two boats and two positions, air is blown onto the inclined surfaces 54A and 55A to clean them when the magazine is carried in. Next, the tool numbers are arbitrarily set according to the tool arrangement of the magazine carried into the magazine support stand 16,
A tool calling device that can be selected arbitrarily depending on the type of magazine will be described. Figure 10-A and 1st
FIG. 0-B shows an embodiment using PROM or ROM as the storage means. NC tape 100N
The tool socket read by the C device 101 and specified by the NC tape 100 is moved to the tool socket attachment/detachment position X.
In order to call up the magazine, the motor 44 is driven via the magazine rotation control circuit 102 to rotate the magazine. When the magazine rotates, the encoder 52 emits addresses from 00 to 79 as electric signals in binary W-adic codes in correspondence with the links of the chain 21 of the magazine, so that the decoder 103
to the tool socket number in PROM or ROMIO4. As described above, when a magazine is carried into the magazine support stand 16, the magazine detecting means 62 determines whether the carried magazine is an A magazine or a B magazine. That is, when the magazine A is carried in, the limit switch LS-5 is stepped on and a 0 signal is output to the most significant bit 80 of the decoder 103. Magazine B
is carried in and limit switch LS-6 is stepped on,
A signal of 1 is issued to the most significant bit 80 of the decoder 103. Therefore, if magazine A is being carried in,
007 of the storage area of PROM or ROMIO4
It is compared with the stored contents of the conversion memory for magazine A up to 9. In addition, if a magazine is brought in, 80
It is compared with the stored contents of the conversion memory for magazine B up to 159. ) The conversion memory for magazine A stores the correspondence between addresses 00 to 79 and tool sockets, corresponding to the arrangement of the tool sockets stored in magazine A, and the conversion memory for magazine B stores the correspondence between addresses 00 to 79 and tool sockets. , the correspondence between addresses 80 to 159 and tool sockets is stored, corresponding to the arrangement of the tools stored in the magazine B.

Therefore, for example, when magazine B is placed on the magazine support stand 16 and a command to call the No. 1 tool socket is issued from the NC tape 100, the magazine B rotates and the signal at address 01 is output from the encoder 52. When the signal is output, the signal at address 81 is output from the decoder 103, and is compared with the contents stored at address 81 in the magazine B conversion memory.

Since the number 1 tool socket is stored at address 81 in the conversion memory for magazine B, the PROM or ROM
A signal indicating that tool socket No. 1 is called is outputted from O4 to the comparison circuit 105, and the comparison circuit 105 issues a signal that matches the output from the NC device 101, and the motor 44 is outputted via the magazine rotation control circuit 102. When stopped, the No. 1 tool socket of magazine B is allocated to the tool socket attachment/detachment position X. If the arrangement of the tool sockets in magazine A or magazine B is changed from the tool arrangement shown in FIG. Furthermore, in the case of a ROM, the ROM itself may be converted into a different storage content. In an embodiment of the invention, one PROM
Alternatively, the storage area of ROMlO4 is divided to accommodate multiple magazines, but if one magazine stores a large number of tools, install PROM or ROM for the number of magazines and use the magazine support stand. Alternatively, the PROM or ROM corresponding to the magazine carried into the magazine 16 may be selected. FIG. 11 shows an embodiment using RAM as the storage means.

The computer 106 stores the correspondence between the address of the encoder 52 and the tool socket number in correspondence with the tool arrangement of the plurality of magazines A to N, and the required magazines are carried into the magazine support stand 16. Then, via the interface 107, the stored contents of the tool array corresponding to the loaded magazine of the computer 106 are stored in the RAM l.
Write to O8. The tool calling operation is performed by the above-mentioned PRO.
Similar to the case of M or ROM, the encoder 52
The address output from
The address of the encoder 52 and the tool socket number are compared in the RAM lO8, and the NC is inputted in the comparison circuit 105.
It compares it with the command tool number from the device 101 and controls the motor 44 via the magazine rotation control circuit 102. In both of the above two embodiments, the position of the tool in the magazine is fixed using a fixed number method, but when changing the RAM, there is also an address rewriting method where the position of the tool changes with the tool change operation. It is possible.

That is, an address rewriting control circuit 109 shown by a broken line in FIG. 11 is installed. The address rewriting control circuit 109 stores the number of the tool in use that is attached to the spindle 15, and when the magazine is indexed and the next tool to be used is called up, the tool changer is used to replace the tool with the spindle 15. When the old and new tools are exchanged with the magazine, the address rewriting control circuit 109 rewrites the currently called tool address in the RAMIO8 to the tool address that was mounted on the spindle. In this way, if the memory contents of the RAM are rewritten in conjunction with the tool exchange operation, when the use of the magazine mounted on the magazine support stand 16 is completed, the tool arrangement at that time will be R.
Since it is stored in the RAMIO8, when replacing the magazine, the contents stored in the RAMIO8 are transferred to the computer 106. When the same magazine is carried into the magazine support stand 16 and used again, the contents transferred to the computer 106 can be written into the RAMIO8. As stated above, the present invention is not limited to the configurations shown in the examples.Changes are expected without departing from the technical idea of the present invention as described in the claims. By the way.

[Brief explanation of the drawing]

FIG. 1 is an overall front view of the automatic tool storage magazine exchange device of the present invention, FIG. 2 is an overall plan view, and FIG. 3-A is an overall longitudinal sectional view of the magazine placed on a magazine support stand.
FIG. 3-B is a cross-sectional view of the magazine rotation prevention means shown in FIG. 3-A, FIG. 3-C is a plan view of the clutch 45, FIG. 4 is a side view showing the spindle head, and FIG. FIG. 6-A is a plan view of the magazine storage stand; FIG. 6-A is a vertical cross-sectional view showing a state in which the magazine is drawn onto the magazine storage stand; FIG. 6-B is an explanatory view for explaining the operation of the first release means; Figure 7-A is a partially sectional plan view showing the magazine positioning means, Figure 7-B is a view taken along the arrow A-A in Figure 7-A (7), and Figure 8 is a view of the sprocket wheel on the drive side. A vertical sectional view, and FIG. 9 is a hydraulic circuit diagram for driving the automatic tool storage magazine changing device of the present invention.
Figure 10-A and Figure 10-B are PROM or ROM
FIG. 11 is a block diagram of a tool calling device using RAM. In the figure, 12...spindle head, 15... main shaft, 16...
...Magazine support stand, 17...Base, 24...Magazine storage stand, 36...Positioning pin, 41...Cylinder, 42...Zeston, 43...Engagement member, 44
...Motor, 45...Clutch, 50...Clamp lever, 52...Encoder, 61...Dog,
62...Magazine detection means, 69...Motor, 74
...Roller follower, 78A, 78B... Positioning means, 91A, 91B... First release means, 103.
...Decoder, 104...PROM or ROMll
O8...RAMllO9...Address rewriting control circuit.

Claims (1)

[Claims] 1. A magazine storage stand on which a spare tool storage magazine to be replaced is mounted, which has a drive source for rotation indexing of the tool storage magazine and a tool calling device for calling the tool to the tool exchange position on the machine tool main body side; In an automatic tool storage magazine exchange device for exchanging a rotatably indexable tool storage magazine with a machine tool main body, the tool storage magazine includes a joint rotatable integrally with the drive source for rotary indexing, and the tool storage magazine. a clamper provided on the machine body side to clamp the tool storage magazine to the machine body side when the magazine is carried into the machine body; a second drive source for clamping and unclamping the clamper; and the tool storage magazine. When the clamper is carried into the machine body side, the tool storage magazine is engaged with the joint and is rotatable.When the clamper is unclamped, the tool storage magazine is engaged with a part of the joint and is rotated for rotation indexing. An automatic exchange device for a tool storage magazine, characterized in that rotation of a drive source is prevented.