JPS5921743B2 - 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 with an automatic tool changer, or when machining many types of workpieces with one machine tool. In order to shorten tool setup time, the tool storage magazine is automatically and quickly replaced using a structure as simple as possible.

This invention relates to an automatic exchange device for tool storage magazines.

A first object of the present invention is to have a drive source for rotating and indexing the magazine on the machine tool main body side, and a tool calling device for calling the tools in the magazine to a tool changing position, and to store spare tools to be replaced. In an automatic tool storage magazine exchange device that exchanges a tool storage magazine between a magazine storage stand on which a magazine is placed and the machine tool main body, rotation of the magazine is disabled during a tool storage magazine exchange operation. In addition, it is an object of the present invention to provide an automatic exchange device for a tool storage magazine, which is capable of rotating and indexing the magazine on the machine tool main body and on the magazine storage table as necessary.

A second object of the present invention is to achieve the first object,
The tool storage magazine is provided with a magazine rotation blocking means to prevent the rotational position of the magazine from shifting due to shock etc. when replacing the magazine, and the magazine rotation blocking means is temporarily installed on the magazine storage stand. An object of the present invention is to provide an automatic exchange device for a tool storage magazine provided with a first release means for release.

As a result, the magazine exchange operation is performed while maintaining the correspondence between the tool calling device provided on the machine tool body side and the tools in the tool storage magazine, and the indexing drive source and the tool storage are maintained. The magazines are connected smoothly.

Also, when removing a worn tool from the spare tool storage magazine or installing another new tool on the magazine storage table, the magazine rotation prevention means is released and the magazine can be freely indexed to replace the new or old tool. It becomes possible to exchange tools.

In this way, when the exchange of the old and new tools is completed, the magazine is indexed again to a position corresponding to the indexing drive source and tool calling device, and the magazine rotation prevention means is activated to hold the magazine in the alignment position. However, it is possible to provide a magazine exchange operation.

A third object of the present invention is to achieve the first object,
By providing a second release means for releasing the magazine rotation prevention means on the magazine support stand on the machine tool main body side, the tool storage magazine can be freely used when changing tools between the main shaft of the machine tool and the magazine. To provide an automatic exchange device for a tool storage magazine that can index and sequentially index and position required tools at a tool exchange position.

A fourth object of the present invention is to rotate a magazine rotation preventing means used to achieve the first to third objects to a tool changing position on a magazine support stand on the machine tool body side. To provide an automatic exchange device for a tool storage magazine which also serves as a positioning means for accurately indexing and positioning a magazine when indexing.

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.

Although the tool storage magazine is installed on the machine tool body side for purposes of explanation, it can be mounted on the top of the column, on the side of the column (separate type, etc.), which is selected depending on the type of machine, the tool body, etc. The present invention is not limited to the embodiments.

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, 2B formed horizontally on a bed 1. An indexing tape A/4 is mounted which can be rotated and indexed about a vertical central axis as a rotation center.

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.

The table guide surface 2A is provided on the bed 1. Two column guide surfaces 7A and 7B formed horizontally in a direction orthogonal to 2B.
A column 8 is slidably mounted on top.

A screw 10 rotated by a motor 9 attached to the side of the bed 1 moves the column 8 into a column guide 111.
It is made to slide back and forth along lines 7A and 7B.

Two spindle head guide surfaces 11A perpendicular to the side surfaces of the column 8,
11B is formed, and the spindle head guide surface 11A.

11B supports the spindle head 12 so as to be slidable in the vertical direction.

A screw 14 rotated by a motor 13 attached to 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.

A magazine support stand 16 is fixed to the upper surface of the spindle head 12,
A magazine A is placed on the upper surface 16A of the magazine support stand 16.

The magazine A is attached to the lower surface of the base 1T of the magazine A, and can be slid lightly on the upper surface 16A of the magazine support base 16 in a direction parallel to the spindle axis by means of near roller bearings 18. As shown in Figure 2,
After being carried onto the magazine support stand 16, it is fixed to the magazine support stand 16.

The tool sockets) 19A (for large-diameter tools) and 19B (for small-diameter tools) attached to magazine A are attached to and detached from the chain 21 that is wrapped in a closed loop around two sprocket wheels (I/20A and 20B), as described later. Mounted as possible.

At the front of the upper surface of the magazine support stand 16 is a tool socket transfer device 2 that pivots between a vertical position and a horizontal position (parallel to the spindle axis) around a horizontal axis perpendicular to the spindle axis.
2 is provided.

The tool socket conveying device 22 removes the tool socket indexed to the tool socket attachment/detachment position of magazine A (X position in FIG. 2) from the chain 21, and rotates it to a slightly tilted position shown in FIG. 1. After waiting and completing machining with the tool attached to the spindle 15, the spindle rotates to a tool exchange position parallel to the axis of the spindle.

A tool exchange arm 23 is provided on the front surface of the magazine support stand 16, between the tool socket transfer device 22 and the main spindle 15, which rotates around an axis parallel to the main spindle axis and which can move in and out in the direction of the main spindle axis. There is.

The tool exchange arm 23 grasps the tool carried in the tool socket transfer position 22 and the tool attached to the spindle 15 by means of openable/closeable tool grasping claws 23A and 23B provided at both ends thereof, and rotates the tool parallel to the axis of the spindle. It moves forward and pulls out both tools, then turns 180 degrees, moves back parallel to the spindle axis, and replaces both tools.

At the rear of the bed 1 is a base 25 of the magazine storage stand 24.
is erected, 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.

Magazine A and magazine B have exactly the same structure, so only magazine A placed on magazine support stand 16 will be explained.

As shown in Figures 3 and 4, base 1 of magazine A
Three linear roller bear links 18 are attached to the lower surface of the magazine A on the left and right sides, and the entire magazine A can be lightly slid on the upper surface 16A of the magazine support stand 16 in a direction parallel to the main shaft axis.

Further, a rectangular guide plate 27 is attached to the center of the upper surface of the magazine support stand 16 in parallel with the main shaft axis by the length of the dowel base 17 in the main shaft axis direction.

A guide groove 28 parallel to the spindle axis is formed on the lower surface of the base 17 and is closely flush with the guide plate 27. 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 upper surface of the front side of the base 17.
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.

These two sprocket wheels 20A and 20B have
A chain 21 is wrapped in a closed loop in two stages, upper and lower.
By locking the hook pieces 34 of the tool sockets N 9A, 19B to each head of the chain pin 33 of the chain 21, a large number of tool sockets 19A, 1 are provided around the chain 21.
9B is removably held, and the tool holding interval can be changed in units of link pitch depending on the type of tool inserted into the tool socket.

The sprocket wheel 20A. 20B, the upper and lower chains 21, and the tool sockets 19A and 19B constitute a rotary indexing body that removably holds a plurality of tools.

Next, the positioning means, which is a magazine rotation preventing means for preventing the magazine from shifting its rotational position 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 main shaft axis. is inserted into.

Large diameter hole 35B drilled concentrically with small diameter guide hole 35A
The large diameter portion 36A of the locating pin 36 is inserted into the locating pin 36, and the locating pin 36 is always urged in the protruding direction by the compression spring 37, and the tip of the locating pin 36 enters the teeth of the sprocket wheel L/20A. This prevents the sprocket wheel 20A from rotating.

In this way, the positioning pin 36 is attached to the sprocket wheel #2.
The state in which 0A is prevented from rotating is the first state in the configuration of the present invention, and the state in which the positioning pin 36 is withdrawn from the sprocket wheel 20A by retreating against the biasing force of the compression spring 37 is the main state. This is the second state in the configuration of the invention.

As shown in Figure 3-8 and Figure 3-B, the casing 3
A pivot 38 is pivotally supported at the lower part of the pivot 3.
8 is provided with a lever 39 facing the large diameter hole 35B.

A pin 39A is provided at the tip of the lever 39 and projects upward, and the pin 39A is inserted into a groove 36B formed in the large diameter portion 36A of the positioning pin 36.

Further, a lever 40 that is perpendicular to the lever 39 is provided at the lower end of the pivot 38, and a pin 4DA that projects downward from the base 17 is provided at the tip of the lever 40.

In this way, the pin 40A is configured to be able to move in the lateral direction perpendicular to the main shaft axis in conjunction with the movement of the positioning pin 36 in the direction parallel to the main shaft axis.

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, which is a drive source for releasing magazine rotation prevention, is attached to the lower front surface of the magazine support base 16, and a piston rod of a piston 42 is fitted into the cylinder 41 so as to be slidable in a direction perpendicular to the main shaft axis. At the tip of 42A,
Engagement member 4 protruding (1) from the top surface of magazine support stand 16
3 is provided on the upper surface of the retaining member 43.
A retaining groove 43A having the same width as the diameter of A is formed 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. Pivoting clockwise, the positioning pin 36 is retreated against the compression spring 37, and the tip of the positioning pin 36 is pulled out from 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 4
The dogs D-1 and D-2 attached to the piston rod 42B protruding rearward from the limit switch LS
-1 and LS-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 Figure 3-8 and Figure 3-0, 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, at the lower end of the rotating shaft 32, a clutch pawl 47A,
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 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 the clutch pawl 4? A, deviate from 47B.

Also, after this, the spare magazine B is placed on the magazine support stand 16.
When the magazine B is carried upward, the clutch pawl 48 of the magazine B is smoothly engaged with the clutch groove 47C of the clutch pawls 47A and 47B, and the rotation of the motor 44 can be transmitted to the rotating shaft 32 of the magazine B.

Also, on the outer periphery of the clutch 45, a clutch pawl 4? A, 4
A positioning groove 49 is formed on the opposite side of the magazine 7B, and when a magazine clamp lever 50 (to be described later) is in an unclamped state, the tip of the clamp lever 50 gets stuck in the positioning groove 49, and the shock caused when replacing the magazine causes the clutch to close. Position it so that 45 does not rotate.

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, since the number of links of the chain 21 is 80, the 80 addresses are The signal is configured to be emitted as an electrical signal in an evolved decimal code.

Therefore, the tool sockets 19N and 19 are attached to the chain pin 33 of the chain 21 at appropriate intervals depending on the tool.
B is in direct correspondence with one of the 80 addresses of encoder 52, respectively.

Since this correspondence relationship differs depending on the magazine, the correspondence relationship between the address of the encoder 52 and the tool socket number is stored in a storage means such as FROM, ROM, or RAM, and is selected according to the magazine, as described later. .

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 is bolted to the front lower surface of the base 17 and has an inclined surface 55A formed thereon that complements the inclined surface 54Aa.

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 pivotally supported on the magazine support base 16 by a horizontal pivot 57 perpendicular to the main shaft axis.

A cylinder 58, which is a driving source for pivotally driving the clamp lever 50, is attached to the lower surface of the magazine support stand 16.
A piston 59 is inserted into the cylinder 58 so as to be slidable in parallel to the spindle axis.

A piston rod 59A protruding rearward of the piston 59 has a retaining groove 6 that engages with the lower end of the clamp lever 50.
A retaining member 60 having 0A is attached, and the piston 59
The reciprocating movement causes the clamp lever 50 to pivot.

Figure 3-A shows that the piston 59 is retracted and the clamp lever is
50 in the counterclockwise direction, press the pressing plate 56 forward with the tip of the clamp lever 50, strongly press the inclined surface 55A of the pressing plate 55 against the inclined surface 54A of the abutment plate 54,
This figure shows a state in which the base 17 of the magazine A is positioned and clamped with respect to the magazine support stand 16.

When the magazine A is finished being used and is to be carried out onto the magazine storage stand 24, the piston 59 is advanced and the clamp lever 50 is pivoted clockwise.
is separated from the pressing plate 56 to release the clamp, and is also fitted into the positioning groove 49 of the clutch 45 described above to stop 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.

To check the forward end and backward end of the piston 59, check the cylinder 5
The dogs D-3 and D-4 attached to the piston rod 59B protruding forward from the limit switch L
This is done by detecting with S-3 and LS-4.

Next, the magazine identification code and magazine detection means will be described in detail.

As shown in FIG. 4, a dog 61 for magazine identification 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. Two limit switches L of the magazine detection means (multi-limit switch) 62
One limit switch among S-5 and LS-5■
, S-5 to detect that magazine A has been carried in, and issue a magazine detection signal as shown in FIGS. 10 and 11, which will be described later.

When the magazine B is carried onto the magazine support stand 16, the dog 61 of the magazine B is connected to the limit switch LS.
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. One book at a time is attached, and a spare magazine B is placed on the guide plate 63B as shown by a two-dot chain line.

The table 26 has four sprocket wheels 64A.
- 64D are rotatably supported on the shaft, and an upper and lower two-stage zero-coat chain 65 is wound around the sprocket wheels 64A to 64D in a closed loop.

The chain 65 is given appropriate tension by a tension pulley 66.

As shown in FIG. 8, four sprocket wheels 64
Among A to 64D, 64A is a driving sprocket wheel.

That is, a sprocket wheel 64A is keyed to a rotating shaft 68 rotatably supported on the table 26 by bearings 67A and 67B, and an output shaft 69A of a motor 69 attached to the lower surface of the table 26 is connected to the rotating shaft 68. It is keyed and transmits the rotation of motor 69 to sprocket wheel #64A.

Chain pin protruding below the chain 65? The block 71 inserted into the OA and the chain pin protruding upward? The block 72 inserted into the OB is integrally connected with a bolt 73, and the upper shaft 72 of the block 72
A roller follower 74 is rotatably attached to A.

As shown in FIGS. 1, 2, 3, 7-8, and 8, the roller follower 74 is provided at the rear end of the base 17 of each magazine to keep it in place when loading and unloading the magazine. Engagement plates 75A and 75B that can be combined are attached to extend rearward.

Engagement plate 75A. Retaining grooves 76A and 76B having the same width as the outer diameter of the roller follower 74 are formed on the lower surface of the tip of the roller follower 74 in a direction perpendicular to the spindle axis, and an engagement plate 75A.

A positioning hole 77A for positioning the magazine on the magazine storage stand 24 is provided on the side surface of 75B.

77B is perforated.

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 L S-7 attached to the side of column 8.

Further, confirmation of the left and right direction of the column 8 is performed by a dog D-6 attached to the lower end of the rear surface of the column 8 and limit switches LS-8 and LS-9 attached to the rear surface of the bed 1.

The position where magazine A is loaded/unloaded is the position where the dog D-6 is pressed and the Mitswitch LS-8 is pressed, and the position where the magazine B is loaded/unloaded is the position where the dog D-5 is pressed and the Mitswitch LS-9 is pressed. It is.

At this time, the roller follower 74 is in the position shown in FIG. 5, and the block 72 is stopped at the position where the limit switch LS-10 is depressed.

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 roller follower 74 is connected to the retaining groove 76
The position where the chain 65 fits in A is the position where the chain 65 is wrapped around the sprocket wheel 64B, and since the roller follower 74 initially fits in parallel to the retaining groove 76A, the speed in the direction of pulling the magazine A onto the table 26 is high. As for the component (force in the direction parallel to the spindle axis), as the non-negative roller follower 74 enters the retaining groove 76A, the speed component in the pulling direction gradually increases, and the roller follower 74 is attached. The maximum speed is reached when the link is parallel to the spindle axis, and thereafter it is pulled at a constant speed.

In this way, the unloading speed of the magazine A gradually increases, so 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 63
It rolls while gradually shifting to A.

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 velocity component in the direction of pulling the magazine A onto the table 26 gradually decreases, and when the pulling speed reaches O, the roller follower 74 is pulled out from the retaining groove 76A of the magazine A, and the magazine A is pulled out. It stops on the table 26.

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-11, the motor 69 stops.

As shown in FIG. 5, FIG. 7-8, and FIG. 7-B, sprocket wheels 64A, 64D are mounted on the table 26.
Directly above the positioning means 78A, which operates in conjunction with the movement of the roller follower 74, positions and fixes the magazine on the table 26.

? 8B is provided.

Positioning means 78A. Since the positioning means 78B have exactly the same structure, only one positioning means 78B will be explained.

As shown in FIG. 7-A and FIG. 7-B, a block 79 is attached to the upper surface of the table 26, and a positioning pin 80 is attached to the block 79 so as to be slidable in a direction perpendicular to the spindle axis.
is supported on the shaft.

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 fork part 85 on the positioning pin 80 side of the lever 84 sandwiches the pin 81, and the fork part 85 on the opposite side of the lever 84
The width of 6 is the same as the outer diameter of the roller follower 74.

A hole 87 perpendicularly drilled in the lever 84 is provided with a spring 8.
A steel ball 89 is inserted which is pressed vertically downward by 8.

The block 79 has a notch 90A into which the steel ball 89 fits.
.

90B is formed, and the steel balls 89 fit into the notches 90A and 90B at each pivot end of the lever 84.
A lever 84 is positioned at each pivot end.

FIG. 7-8 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 mouth/rough follower 74 moves to the lever 84 as shown in FIG. 7-8. into the fork part 86 of the positioning pin 80 and pivot the lever 84 counterclockwise to release 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 is completely pulled out of the positioning hole 77B, the magazine A becomes movable, and the roller follower 74 is moved from the bifurcated portion 86 of the lever 84. It comes off.

At this time, the steel ball 89 fits into the notch 9OB and positions the lever 84 in the block 79.

When the positioning of the lever 84 is completed, the roller follower 7
4 fits into the retaining groove 76B of the magazine B, and pushes the magazine B out of the table 26 while gradually accelerating it.

Conversely, when pulling the magazine B onto the table 26, the chain 65 moves clockwise to pull the magazine B onto the table 26, gradually decelerating near the end until the speed reaches O. Then, the roller follower 74 is pulled out from the engagement groove 76B.

Subsequently, the roller follower 74 enters the bifurcated portion 86 of the lever 84 located at the two-dot chain line position, pivots the lever 84 clockwise, and inserts the positioning pin 80 into the positioning hole 77B.

When the roller follower 74 moves until it disengages from the bifurcated portion 86 of the lever 84, the positioning pin 80 moves into the positioning hole 77.
completely insert into magazine B and position magazine B on table 26.

At this time, the steel ball 89 of the lever 84 fits into the notch 9OA, positioning the lever 84 on 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 to position the magazine A on the table 26 at the final position of the pull-in.

As mentioned above, when the unloading operation of the magazine A is completed and the limit switch LS-11 is stepped on, the column 8 moves to the position where the magazine B is loaded onto the magazine support stand 16 according to the tape command, and the column 8 moves to the position where the magazine B is loaded onto the magazine support stand 16. 6 steps on the limit switch LS-9, and the loading operation of the magazine B is started.

That is, the motor 69 is driven and the chain 65 is moved counterclockwise, and as described above, the roller follower 7 is first moved.
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 fits into the retaining 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 7B is O. , and the roller follower 74 is disengaged from the engagement groove 76B of the magazine B.

The chain 65 continues to move counterclockwise, and the block 72 of the roller follower 74 moves to the limit switch L.
When S-12 is stepped on, the motor 69 stops.

The loading and unloading operations of the magazine are now complete, and after clamping the magazine B with the clamp lever 50 described above on the magazine support stand 16, the machine tool moves to the position where the next machining will be performed, and the magazine B is stored. Perform processing using tools.

As mentioned above, the magazine is provided with a magazine rotation blocking means to prevent the rotation index position of the magazine from shifting when the magazine is carried in and out.
4 is a magazine rotation prevention release means in the structure of the present invention that releases the magazine rotation prevention means in order to freely index the magazine drawn onto the magazine storage table 24 and exchange old and new tools. Certain first release means are provided.

As shown in FIGS. 5 and 6-A1 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.
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. 6-A and 6-B will be described in detail.

A pivot 92 is pivotally supported on the table 26, and a manual lever 93 that protrudes from the side surface of the table 26 is attached to the lower end of the pivot 92.

The manual lever 93 is constantly pulled counterclockwise by a tension spring 94, and a lever 95 is attached to the upper end of the pivot shaft 92.
is installed.

As mentioned above, the positioning pin 36 shown in FIGS. 3-A and 3-B, which is a magazine rotation preventing means and a magazine positioning means, is constantly inserted into the teeth of the sprocket wheel 20A by the compression spring 37, and the positioning pin 36 is a magazine positioning means. The structure is such that the magazine cannot be rotated at any time, not only during the unloader operation of 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
is pulled onto the table 26 and the magazine B is carried into the machine tool main body side, it is necessary to replace the worn tools stored in the magazine A or change the tool socket arrangement, so the manual lever 93 described above needs to be replaced. , and rotate the magazine A by hand to change the tool.

That is, as shown in FIG. 6-B, when the manual lever 93 is turned clockwise, the lever 95 hits the pin 40A of the lever 40 on the positioning pin 36 side, and the levers 40 and 3
9 pivots clockwise, retracting the locating pin 36 against the compression spring 37, so that the sprocket wheel 20
The tip of the positioning pin 36 is pulled out from the teeth of A, and 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, When you release your hand from the manual lever 93, the tension spring 94
As a result, 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, thereby preventing the magazine A from rotating.

In this state, replace the tool or tool socket that has been indexed to a position where it can be easily replaced, repeat the above-mentioned replacement operation, and when all the tools that require replacement have been replaced, the encoder 52 and magazine A are In order to align the magazine A with the ejected position, index the magazine A to the original position and press the manual lever 9.
3 and inserts the positioning pin 36 into the teeth of the sprocket wheel 2OA to prevent rotation of the magazine A and prepare for the next magazine A replacement operation.

Regarding magazine B, the above-described tool exchange operation can be performed in the same manner as for magazine A.

In the embodiments described above, the first release means 91A, 91B are operated manually, but they can also be operated automatically using power or a drive source.

FIG. 9 is a hydraulic circuit diagram for operating the automatic tool storage magazine changing device of the present invention.

The motor 69 is rotated in forward and reverse directions by a four-bottom, three-position solenoid valve 96, and drives the chain 65 when loading and unloading the magazine.

The chain 65v is stopped by setting the solenoid valve 96 to a neutral all-port block state and stopping the motor 69.

The reciprocating movement of the piston 59 that operates the clamp lever 50 is performed by switching a solenoid valve 97 having four points and two positions.

When the magazine is carried onto the magazine support stand 16, the inclined surfaces 54A and 55 of the abutment plate 54 and the abutment plate 55 are in close contact with each other.
In order to clean the magazine A, an air nozzle 98 is provided on the abutment plate 54 and opens at the inclined surface 54A.
Air is blown onto the inclined surfaces 54A and 55A to clean them.

Next, a description will be given of a tool calling device in which tool numbers are arbitrarily set according to the tool arrangement of magazines carried into the magazine support stand 16, and are arbitrarily selected according to the type of magazine.

FIG. 10-A and FIG. 10-B show FR as a storage means.
This shows an example using OM or ROM.

The NC tape 100 is read by the NC device 101,
In order to call the tool socket specified by the NC tape 100 to the tool socket stacking position X, the motor 44 is driven via the magazine rotation control circuit 102 to drive the magazine one rotation.

When the magazine rotates, the encoder 52 emits the addresses from OO to 79 as electrical signals in binary coded decimal code corresponding to the links of the chain 21 of the magazine. Contrast with the number.

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 magazine A is carried in, limit switch LS
-5 is stepped on and the most significant bit 80 of the decoder 103 is set to O
When the magazine B is carried in and the limit switch LS-6 is stepped on, a signal of 1 is generated at the most significant bit 80 of the decoder 103.

Therefore, if magazine A is being carried in, FRO
Of the storage areas of M or ROM 104, the storage contents of magazine A phase conversion memory from 00 to 79 are compared.

In addition, when magazine B is carried in, 80 to 1
The stored contents of the magazine B phase conversion memory up to 59 are compared.

The magazine A phase conversion memory stores the correspondence between addresses 00 to 79 and tool sockets, corresponding to the arrangement of the tool sockets stored in the magazine A, and the magazine B phase conversion memory stores corresponds to the arrangement of tool sockets stored in magazine B, and stores the correspondence between addresses 80 to 159 and tool sockets.

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 a signal at address 01 is output from the encoder 52. When the signal at address 81 is output from the decoder 103, it is compared with the stored contents at address 81 in the magazine B phase conversion memory.

Since the No. 1 tool socket is stored at address 81 in the magazine B phase conversion memory, FROM or ROM1 is stored.
04, a signal indicating that tool socket No. 1 is called is output 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 stopped via the magazine rotation control circuit 102. Then, the No. 1 tool socket of magazine B is indexed to tool socket attachment/detachment position X.

If the arrangement of the magazine A or magazine B (7) tool sockets is changed from the tool arrangement shown in Figure 10-B, in the case of FROM, the memory contents should be rewritten to correspond to the changed tool arrangement. In the case of ROM, the ROM itself can be replaced with one with different storage contents.

In an embodiment of the invention, one FROM or ROM 1
The storage area of 04 is divided to accommodate multiple magazines, but if one magazine stores a large number of tools, install FROM or ROM for the number of magazines and store them on the magazine support stand 16. The FROM or ROM corresponding to the loaded magazine may be selected.

FIG. 11 shows an embodiment using FtAM 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, the stored contents of the tool array corresponding to the loaded magazine of the computer 106 are transferred to the RAM 1 via the interface 107.
Write in 08.

The tool calling operation is performed using the P'ROM or ROM described above.
The address output from the encoder 52 is input to the RAM 108 via the decoder 103, and
The RAM 108 compares the address of the encoder 52 with the tool socket number, and the comparing circuit 105 compares it with the commanded tool number from the NC device 101.
The motor 44 is controlled via.

In both of the above two embodiments, the position of the tool in the magazine is a fixed number system, but the RA
In the case of M, an address rewriting method in which the position of the tool changes with the tool exchange operation is also 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 exchanger connects the spindle 15 and the magazine. When the old and new tools are exchanged between the
The currently called tool address of 108 is rewritten to the tool address installed on the spindle.

In this way, by rewriting the rules in the RAM in conjunction with tool exchange operations, when the use of the magazine placed on the magazine support stand 16 is completed, the tool arrangement at that time will be stored in the RAM 108. Therefore, when replacing the magazine, the M6M contents of RAM 108 are transferred to computer 1.
Transfer to 06.

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 RAM 108.

As stated above, the present invention is not limited to the configurations shown in the embodiments, and modifications are expected within the scope of not departing from the technical idea of the present invention as described in the claims. be.

Since the present invention adopts the configuration described above, it brings about various excellent effects as listed below.

■ A drive source for indexing the rotation, a drive source for releasing magazine rotation blockage, and a drive source for pivotally driving the clamp lever are installed on the magazine support stand on the machine tool body, so these drive sources are installed in the magazine. There's no need.

Further, when the magazine storage block on the magazine storage table is released by power, the drive source can also be provided on the magazine storage table, so there is no need to provide the drive source on the magazine.

Furthermore, there is no need to provide a power supply line, such as an oil pipe line, for these drive sources in the magazine.

Therefore, the magazine has a simple structure and is light in weight, so it is possible to increase the moving speed of the magazine when replacing the magazine, and the magazine can be replaced quickly.

■ The clutch, clutch pawl, pin, and engagement member are attached to and detached from each other as the magazine moves when replacing the magazine. In addition to moving the magazine, there is no need for a separate film-forming operation to drive the release of blockage, and there is no need for confirmation operations such as detection, which makes it possible to simplify and reduce the weight of the magazine structure. Magazine replacement can be done even more quickly.

(2) Since the positioning member is biased by a spring so as to lock the rotary indexing body, rotation of the magazine can be prevented by the magazine alone.

Therefore, rotation is prevented not only when the magazine is on the magazine support stand or the magazine storage stand (excluding when changing tools), but also when changing the magazine, thus preventing the position of the tool in the magazine from changing due to changing the magazine. are doing.

Furthermore, since there is no need to provide a locking means for preventing rotation in addition to the positioning means, it is possible to contribute to the simplification of the structure.

■ Positioning of the magazine on the magazine support stand by pressing the pressing plate and locking action at the clutch's home position.
This can be done commonly using a clamp lever.

That is, by pivoting the clamp lever, the pressing plate can be pressed and the clutch can be unlocked in the same operation, and the pressing plate can be released and the clutch can be locked in the same operation.

Therefore, it is possible to speed up magazine exchange by shortening the time required to check the operation, and to simplify the structure.

■ Since the rotary indexing type tool storage magazine is automatically exchanged, a large number of tools can be used in a relatively small space. This makes it possible to improve efficiency and cope with diversification of processing.

[Brief explanation of drawings]

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. 3-8, 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; Fig. 7-A is a partially sectional plan view showing the magazine positioning means, Fig. 7-B is a view taken along the arrow A-A to Fig. 7-, and Fig. 8 is a vertical cross-section of the sprocket wheel on the drive side. Fig. 9 is a hydraulic circuit diagram for driving the automatic tool storage magazine changing device of the present invention.
Figure 0-A and Figure 10-B are block diagrams of a tool calling device using FROM or ROM, and Figure 11 is a block diagram of a tool calling device using FROM or ROM.
FIG. 2 is a block diagram of a tool calling device using M. In the figure, 12... Spindle head, 15...
・Main shaft, 16...Magazine support stand, 17...
...Base, 19A. 19B...Tool socket, 20A, 20B...
... Sprocket wheel, 21 ... Chain, 24 ... Magazine storage stand, 32 ...
...Rotating axis, 36...Positioning pin, 37...
...Compression spring, 40A...Pin, 41...
...Cylinder, 42...Piston, 43.
...Engagement member, 44...Motor, 45.
...Clutch, 48...Clutch pawl, 4
9... Positioning groove, 50... Clamp lever 152... Encoder, 56...
・Press plate, 58...Cylinder, 61...
・Dog, 62...Magazine detection means, 69・
...Motor, 74...Roller follower,
78A, 78B...Positioning means, 91A, 9
1B...First release means, 93...Manual lever, 103...Decoder, 104...
...PROM or ROM, 108...RA
M. 109...Address rewriting control circuit, A, B...
····magazine.

Claims (1)

[Claims] 1. A rotary indexing type tool storage magazine, which has a rotary indexing body mounted on a base that removably holds multiple tools, is exchanged between the magazine support stand on the machine tool body side and the magazine storage stand. In the automatic tool exchanger, the tool storage magazine includes a rotating shaft rotatably supported by the base and rotationally driving the rotating indexing body, a clutch pawl provided on the rotating shaft, and the rotating indexer. The first to lock the body
a positioning member provided on the base so as to be movable between the state and a second state of detaching from the rotating side projecting body;
The magazine support base includes a spring that biases the positioning member to the first state, a pin that moves in conjunction with the movement of the positioning member, and a pressing plate provided on the base. A clutch that detachably engages with the clutch pawl in the direction of movement of the tool storage magazine when replacing the tool storage magazine, a drive source for rotational indexing connected to the clutch, and replacement of the tool storage magazine. A retaining member that removably engages with the pin in the direction of movement of the tool storage magazine, a drive source connected to the retaining member for releasing magazine rotation prevention, and a pivot on the magazine support base. a clamp lever that is movably supported and selectively engages either the pressing plate or a positioning groove provided in the clutch; and a drive source that pivotally drives the clamp lever; An automatic exchange device for a tool storage magazine, characterized in that the magazine storage table is provided with a magazine rotation prevention release means that detachably engages with the pin and moves the pin.