JPS61117038A - Tool pot tilting apparatus - Google Patents

Abstract

PURPOSE:To prevent the breakage and trouble of an endless chain by engaging a stepped engaging piece installed at the rear part of a tool pot with an inclined holder guided in a cam groove and preventing the endless chain from being applied with the force in the direction for pulling-out a tool, in a tool magazine for an automatic tool replacing apparatus, etc. CONSTITUTION:A stepped engaging piece 12 installed in the divided state at a tool replacing position P at the rear part of a tool pot 8 is engaged with an inclined holder 17, and the shift in the axial direction is prohibited each other. Then, the tool pot 8 is revolved around a pin 10 with the inclined holder 17 by the shift of a piston rod 22, and tilted up to the tool pulling-out posture crossing at right angles with a dividing shaft 6. Said tilt is carried-out in the state where a guide pin 18 fixed onto the inclined holder 17 is fitted into a cam groove 20 on a cam plate 19. Therefore, when a tool is pulled-out, the force in the axial direction which acts onto the tool pot 8 is supported onto the cam plate 19 through the inclined holder 17 and the guide pin 18, and an unreasonable force is not applied onto an endless chain 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tool pot tilting device for a tool magazine in an automatic stationery changer.

In the conventional technology tool magazine, a tool pot (tool storage tube) is pivotally supported on a rotary disk to be indexed by an indexing shaft, and the toolpot indexed to the tool exchange position is moved to the indexing shaft by a tilting device. The tool is tilted from the parallel direction to the perpendicular direction, and then the tool is exchanged with the tool on the main spindle using the tool exchange arm. In such a tilting device, for example, a fitting is fixed to the tip of the cylinder rod of a hydraulic cylinder placed at the tool exchange position, and an intervening rod is pivoted to this fitting so that it can rotate to the right, and a strong spring is used to rotate the intervening rod to the right. There is a device in which the return rod is pivoted to the intervening rod so that it can rotate to the left, the rotation to the left is stopped by a weak spring, and the return rod is engaged with a push pin at the rear end of the tool pot. Showa 5
No. 6-21743).

Problems to be Solved by the Invention By the way, the above-mentioned tilting device has a plurality of tool pots supported via pivots on an endless chain that is transferred and indexed by an indexing shaft, and is indexed to a tool exchange position. If you try to apply it to a tool magazine in which the tool pot is tilted from a state parallel to the indexing axis to a direction perpendicular to the main axis so that it is parallel to the main axis, when extracting a tool from the tool pot parallel to the main axis at the tool exchange position, , an axial force is applied to the tool pot, and this axial force pulls the endless chain through the pivot in a direction parallel to the main axis (orthogonal to the indexing axis), applying extra force to the endless chain, and There was a risk that problems would occur in the elongation and lifespan of the product.

Means for Solving the Problems In the present invention, a stepped locking piece is attached to the rear of the tool pot,
At the tool exchange position, there is a tilting holder whose tip has a retaining groove with a locking edge facing between the stepped front surface of the stepped locking piece of the tool pot indexed at the tool change position and the rear surface of the tool pot. A guide pin is provided in the middle part of the tilting holder in parallel with the pivot shaft, a cam groove is provided in the magazine body for guiding the guide pin around the pivot shaft, and a guide pin is provided in the magazine body, and a guide pin is provided in the guide pin of the tilting holder. On the other hand, the opposite side of the holding groove and the magazine body corresponding to the tool exchange position are connected by a cylinder, and the movement of the cylinder rod moves the tilting holder between a position parallel to the index axis and a position perpendicular to the index axis. It is composed of:

According to the above configuration, in a tool magazine in which a large number of tool pots are pivotally supported on an endless chain, the stepped locking piece at the rear of the tool pot indexed to the tool exchange position engages with the tilting holder, and then the cylinder rod With this movement, the guide pin of the tilting holder is guided along the cam groove of the magazine body, and the tilting holder is tilted together with the tool pot from a state parallel to the index axis using the pivot as a fulcrum, to a state in which it is perpendicular to the index axis.
When the tool is removed, the axial force is received by the engagement between the stepped locking piece and the tilting holder, and the engagement between the guide pin of the tilting holder and the cam groove.

Embodiment As shown in FIGS. 1 to 3, a guide member 2 is attached to the magazine body 1.
are installed appropriately. Reference numeral 3 designates an endless chain, with guide rollers 5 mounted on both sides of the link pin 4 so as to be transferred and guided by contact with the guide member 2; It is designed to be indexed repeatedly. The guide member 2 is formed into a U-shaped portion 2a at the vertical transfer portion of the endless chain 3, and is designed to guide the guide roller 5. This U-shaped portion 2a has a relatively large gap in the direction parallel to the main axis with respect to the guide roller 5.5. The endless chain 3 has a plurality of tool pots 8 each mounted on a support 9 with a pivot 10.
It is supported to swing through. A U-shaped guide rail 11 for guiding a stepped locking piece at the rear of a tool pot 8, which will be described later, is continuously disposed in the magazine body 1 along the endless chain 3. This U-shaped guy rail 11 is
As shown in FIG. 3, only a portion corresponding to the tool change point MP is cut out by a predetermined length and is discontinuous. A stepped roller 12 exemplified as a stepped locking piece with a large diameter at the rear is rotatably supported at the rear of the tool pot 8, and this stepped roller 12 is guided by the U-shaped guide rail 11. The tool pot 8 is conveyed and indexed while being kept parallel to the indexing shaft 6. At the tool exchange position P.

A retaining groove 16 with a retaining edge 15 is formed at the tip of the tool pot 8 indexed at the tool exchange position @p between the stepped front surface 13 of the stepped roller 12 and the rear surface 14 of the tool pot 8. The tilting holder 17 is normally positioned so as to connect the notches of the U-shaped guy rail 11. This tilting holder 1
Guide pins 18.18 are rotatably supported on the upper and lower intermediate portions of the tool pot 7 in parallel with the pivot shaft 1o of the tool pot 8.

A pair of upper and lower cam plates 1 are attached to the U-shaped guy rail 11 in the notch.
9.19 is provided, and this cam plate 19.19 is provided with an arc-shaped cam groove 20.20 that guides the guide pin 18.18 around the pivot shaft 1o, and the guide pin 18.18 is guided in this cam groove 20.20. A pin 18.18 is fitted in a sliding manner.

Furthermore, the magazine body 1 has an endless chain 3 at the tool exchange position P.
The cylinder 21 is supported by a pin at its middle part inside the piston rod (on the left side in FIG. 1), and this piston rod 22
The tip of the tilting holder 17 is connected to the guide pin 18 of the tilting holder 17 with the opposite side of the holding groove 16 by a pin 23, and the movement of the piston rod 22 moves the tilting holder 17 to a standby position parallel to the indexing shaft 6 (FIG. 1). ) (Figure 4)
When the tool pot 8 reaches the working position perpendicular to the indexing shaft 6, the tool pot 8
The stopper 24 that comes into contact with the side surface of the U-shaped guide rail 11
is installed on. A tool exchange arm 25 is supported on a rotating shaft 27 parallel to the main shaft 26, and is adapted to exchange tools between the tool pot 8 located orthogonally to the indexing shaft 6 and the main shaft 26. Further, 28 is a very weak spring that biases the pin 23 in the tilting direction when the tilting holder 17 is in the standby position.

According to such a configuration, the sprocket 7 is rotated by the rotation of the indexing shaft 6, and the tool pot 8 containing the tool T necessary for the primary machining is indexed to the tool exchange position [P]. At this time,
Holding groove 1 of the tilting holder 17 where the stepped roller 12 at the rear of the tool pot 8 is in the standby position from the U-shaped guide rail 11
Enter 6. Then the piston rod 22 retreats,
This allows the tilting holder 17 to move forward with its guide pin 18.18.
is guided in the cam groove 20.20, and the tool pot 8 is
The tool pot 8 is tilted 90 degrees about the pivot 1o as a fulcrum, and the tool pot 8 is brought into contact with the stopper 24 and placed in the operating position. In this state, the tool exchange arm 25 rotates, grips the main shaft 26 and the tools T in the tool pot 8, moves forward in the axial direction, and removes each tool T.

At this time, an axial force is applied to the tool pot 8 via the tool T, and this axial force is applied to the stepped portion front side 13 of the stepped roller 12.
When the locking edge 15 of the tilting holder 17 engages with the locking edge 15 of the tilting holder 17, the tilting holder 17 attempts to move forward, but since the guide pin 18.18 of the tilting holder 17 is fitted into the cam groove 20.20, the tilting holder 17 moves in the axial direction. The force is received by the cam grooves 20 and 20, and is applied to the endless chain 3 in a direction perpendicular to the indexing shaft 6 (towards the right in Fig. 4).
No force is applied. Next, the tool exchange arm 25
After turning and moving back, a new tool T is attached to the main spindle 26 and a completed tool T is attached to the tool pot 8. The tool exchange arm 25 is placed in a standby state, and the main spindle 26 starts machining and the piston rod 22 moves forward and inverts the tool pot 8 to the standby position.

In this embodiment, an additional force is applied by the spring 28 so that the guide pin 18.18 starts to move smoothly along the cam groove 20.20 when the tilting holder 17 in the standby position starts moving.
This spring may be omitted.

Further, although the stepped roller is rotatably supported as the stepped engagement piece, the present invention is not limited to this, and a convex engagement piece may be used.

Effects of the Invention As described above, in the present invention, the sole pot is pivotally attached to the endless chain and the tool is reversed by the cylinder directly disposed at the tool exchange position, so that it can be manufactured at low cost. Moreover, for reversal, a stepped stop piece is attached to the rear end of the tool pot, and the magazine body has a cam groove, which engages with the cam groove to lock the tool pot indexed to the tool exchange position. It is equipped with a tilting holder that engages with the stepped locking piece to invert the tool pot, and also engages with the stepped locking piece in the tool pot opening direction. The force applied in the direction can be received by the main body (cam groove) via the stepped locking piece and the tilting holder, and this force can be prevented from being applied to the endless chain, which has the effect of preventing chain breakage and failure. Since the reaction force receiver is constituted by the tool pot tilting device itself, a compact structure can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the entirety of the present invention, FIG. 2 is a view from A in FIG. It is. 1...Magazine body, 3...Endless chain, 6...
Indexing shaft, 8... Tool pot, 10... Pivot, 12... Stepped locking piece (stepped roller), 13.
・・Front side of step part, 14 ・・Rear side of tool pot, 15
...locking edge, 16...retaining groove, 17...
Tilting holder, 18... Guide pin, 20... Cam groove, 21... Cylinder, 22... Cylinder rod Patent applicant Howa Kogyo Co., Ltd. @2 Figure 3

Claims (1)

[Claims] 1. A large number of tool pots are supported via pivots on an endless chain that is attached to the magazine body and transferred and indexed by an indexing shaft, and the tool pots indexed to the tool exchange position are moved orthogonally to the indexing shaft. In a tool magazine that is tilted in the direction parallel to the main axis, a stepped locking piece is attached to the rear of the toolpot, and the stepped locking piece of the toolpot indexed to the tool changing position is installed at the tool changing position. A tilting holder is provided with a retaining groove formed at the tip with a locking edge facing between the front surface of the stepped part of the stopper and the rear surface of the tool pot, and a guide pin is installed in the middle of the tilting holder parallel to the pivot axis. and a cam groove for guiding the guide pin around the pivot shaft is provided in the magazine body, and a portion of the tilting holder opposite to the guide pin of the holding groove and a magazine body corresponding to the tool exchange position are provided. 1. A tool pot tilting device, characterized in that the tool pot tilting device is connected by a cylinder, and configured such that the tilting holder is moved between a position parallel to an indexing axis and a position orthogonal to the indexing axis by movement of the cylinder rod.