JP2008272884A - Manual tool attaching-detaching device in tool magazine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost by surely confirming the replacement of a tool without depending on an electric method. <P>SOLUTION: A lever 5 is provided with a guide member 16 having a cutout 18 for opening an insertion hole 11 of an operation rod 12 only in a retreat position of a holder 9. A slide groove 22 is formed on the outer periphery of the operation rod 12 for fitting the guide member 16 in a predetermined insertion position to the insertion hole 11 from the cutout 18 and allowing forward sliding of the operation rod 12 along the guide member 16. A locking piece 19 is arranged in the cutout 18 of the guide member 16, and a guide groove 21 is arranged on the operation rod 12 for regulating the forward sliding of the operation rod 12 until the locking piece 19 reaches the slide groove 22 by fitting the locking piece 19 in the inserting-extracting direction of the operation rod 12, respectively, to be formed as a structure capable of inserting and extracting the operation rod 12 only in the retreat position of the holder 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a manual tool attaching / detaching device capable of manually attaching / detaching a tool held in a tool magazine in a tool magazine of an automatic tool changing device provided in a machine tool.

In an automatic tool changer provided in a machine tool, a tool attached to a tool magazine can be directly and manually changed as necessary. For example, in Patent Document 1, when a tool is exchanged by providing a swing arm provided with a swing protection pot on a stationary plate provided with a tool magazine body that rotates with a tool held at the periphery, the tool can be opened and closed. Once the tool is stored in the swing protection pot from the tool magazine body, the swing arm is opened and the tool is removed, while the new tool is stored in the swing protection pot and the swing arm is closed. Is disclosed.
On the other hand, using a tool change arm and a tool magazine provided with a plurality of tool gripping tools continuously on the outer periphery of an endless body such as a chain stretched between a pair of sprockets, for example, a tool is attached to the tool magazine. There is also known an automatic tool changer that inserts and removes a tool by turning and moving the exchange arm back and forth. In this case, when the tool of the tool magazine is manually replaced, the pot is moved by moving the pot forward and backward at a predetermined replacement position, but the pot is not reliably retracted after the replacement. Limit switches and proximity switches that detect the retraction of the pot are provided so that the tool magazine does not turn.

Japanese Utility Model Publication No. 63-67034

  In the former tool magazine device, the tool magazine body moves forward and backward in the direction of the rotation and rotation axis to insert and remove the tool, so that the time required for tool change becomes long. Since the small tool changing arm turns and inserts the tool, there is an advantage that the tool changing time is shortened. However, since manual tool change confirmation depends on the electrical method, when switch failure or wire breakage occurs, tool change confirmation cannot be performed, and reliability and reliability deteriorate. There is also a problem of cost increase due to the adoption of the switch.

  SUMMARY OF THE INVENTION Accordingly, the present invention provides a manual tool attaching / detaching device capable of reliably confirming tool replacement without relying on an electric type in a tool magazine of an automatic tool changing device using an endless body and expecting cost reduction. It is aimed at.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a magazine frame and a plurality of gripping tools which are rotatably supported by the magazine frame and capable of gripping a tool, and each tool is indexed and positioned. A tool magazine of an automatic tool changer having a possible endless body, a manual tool attaching / detaching device provided for manually attaching and detaching the tool, the storage position in the tool magazine, and the tool magazine And a retractable position behind the endless body and the gripping tool and a tool gripped by the gripping tool are held on the retractable member. Provided with a holder that is slidable between possible advance positions, and a slide operation of the holder and an exchange position of the retractable member by an operation rod that is detachably attached to a side surface of the holder The tool can be attached to and detached from the gripping tool, while the operation rod is inserted into the protruding and retracting member at the side of the holder and only at the retracted position of the holder. A guide member provided with a guide portion that opens a hole is provided, and the guide member is fitted to the outer periphery of the operation rod at a predetermined insertion position from the guide portion to the insertion hole. A slide groove that allows the operation rod to slide forward along the guide rod is formed, and the guide portion and the operation rod of the guide member are fitted to each other in the insertion / removal direction of the operation rod. Each of the control portions is provided with a restriction portion for restricting the slide of the operation rod forward until a predetermined insertion position is reached.

In addition to the object of claim 1, the invention according to claim 2 is provided with a guide member across the upper portion of the insertion hole in order to easily form the guide portion and the restricting portion. A notch that is provided at the lower end of the guide member and allows the operation rod to pass therethrough, and a restricting portion is provided from the center of the notch to the locking piece and from the tip to the slide groove on the upper surface of the operation rod, It is a guide groove through which the locking piece can pass in the axial direction of the operation rod.
In addition to the object of claim 1 or 2, the invention described in claim 3 is locked to the holder when the operating rod is not attached to the holder in order to prevent erroneous operation more reliably. Then, the forward movement is restricted, and a lock member that releases the locking with the holder by interfering with the operation rod when the operation rod is mounted on the holder is provided.

According to the first aspect of the present invention, since the operating rod can be inserted and removed only at the retracted position of the holder, the holder after the tool replacement is surely positioned at the retracted position. Therefore, tool replacement can be confirmed reliably without using an electric type such as a limit switch, reliability can be improved, and cost reduction can be expected.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the guide portion and the restricting portion can be easily formed by a slight design change of the guide member and the operation rod.
According to the third aspect of the present invention, in addition to the effect of the first or second aspect, the holder cannot be slid unless the operation rod is securely attached, and erroneous operation is more reliably prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view showing an example of a manual tool attaching / detaching device of the present invention. A manual tool attaching / detaching device (hereinafter simply referred to as “attaching / detaching device”) 1 is a magazine frame of a tool magazine in an automatic tool changing device of a machine tool. 30. As shown in FIG. 2, the tool magazine is elastically attached to the outer periphery of a magazine chain 31 as an endless body stretched between a pair of upper and lower sprockets (not shown) with the tool T parallel to the rotation axis of the sprocket. .. Is a well-known configuration in which a plurality of C-shaped gripping tools 32, 32,... Are continuously provided to index and position the gripping tool 32 to a predetermined position by rotating the magazine chain 31. The tool can be transferred to and from the main shaft by turning a tool changing arm (not shown) and moving back and forth in the turning axis direction.
In addition, in this specification, let the front-end | tip (blade) side of the tool T be the front, the reverse is the back, and let the horizontal direction orthogonal to this front-back direction be a side.

  First, a notch 33 is formed at a predetermined position of the magazine frame 30 so as to be located behind the tool gripped by the gripping tool 32 and open to the side, and a notch 3 that also opens to the side is formed in the notch 33 portion. Is attached from the rear surface (the lower left side in FIG. 1 is the front). A lever 5 as a projecting / retracting member is pivotally attached to the base 2 by a pivot shaft 4 provided in the front and rear direction, and a magazine frame 30 is brought into contact with a stopper 6 fixed to the base 2 around the pivot shaft 4. Swinging between the storage position that fits inside and the replacement position that protrudes to the side of the magazine frame 30 until the positioning bolt 7 screwed into the lever 5 abuts the lower edge of the notch 33, appears and disappears from the magazine frame 30. It is possible. Reference numeral 25 denotes a guide plate that is mounted on the rear surface of the base 2 and above the notch 3 and guides the operation of the lever 5.

Further, a pair of upper and lower parallel guide shafts 8 and 8 project forward from the side edge of the lever 5 on the side, and the guide shafts 8 and 8 are short cylinders into which the tool T can be inserted and held. A base end portion of the holder 9 is loosely inserted and supported so as to be slidable back and forth. Between the front ends of the guide shafts 8 and 8, a stopper plate 10 that connects both the guide shafts 8 and 8 and restricts the forward sliding of the holder 9 is connected.
Further, an insertion hole 11 that opens downward is formed on the side surface of the base end portion of the holder 9, and an operation rod 12 that has a tapered portion 13 with a tapered tip can be inserted into and removed from the insertion hole 11. ing.

  In the side surfaces of the lever 5 and the stopper plate 10, inclined cut grooves 14 and 14 are formed on the side surfaces of the holder 9 located between the two, with the upper surfaces inclined obliquely downward at the same angle as the insertion hole 11. In addition, a cutting groove 15 that faces downward at the same angle as the cutting groove 14 is formed at the same height as the cutting groove 14, and has a reverse L-shaped cross section between the cutting grooves 14 and 14 of the lever 5 and the stopper plate 10. A guide member 16, which is a plate body, is installed in an inclined shape and fixed by bolts 17 and 17. Therefore, the guide member 16 is fitted into the cut groove 15 of the holder 9, and the holder 9 is slid forward and backward along the guide member 16.

Here, the excision groove 15 communicates with the upper part of the insertion hole 11 so that the lower end of the guide member 16 protrudes inward across the insertion hole 11 and is inserted at the lower edge of the guide member 16. As shown in FIG. 3, the projecting portion into the hole 11 has an arc shape matching the upper portion of the insertion hole 11, and a notch 18 is formed as a guide portion with a locking piece 19 suspended at the center. Has been.
On the other hand, on the upper surface of the tapered portion 13 of the operating rod 12, curved guide surfaces 20 and 20 that can come into contact with the notches 18 of the guide member 16 in association with insertion into and removal from the insertion hole 11, are formed. A guide groove 21 through which the locking piece 19 can pass is formed between the guide surfaces 20 and 20 in the axial direction from the front end surface, and the lower end of the guide member 16 can be fitted to the end of the guide groove 21. Slide grooves 22 are continuously provided in an orthogonal shape. The guide groove 21 and the locking piece 19 serve as a restricting portion of the present invention.

  A lock member 23 is provided outside the guide member 16. The lock member 23 is a plate body whose front end is rotatably mounted by a bolt 17 and whose rear end can swing up and down along the outer surface of the guide member 16, and the rear end of the guide member 16 in a horizontal state. It has a length that covers the notch 18. A lock piece 24 projects downward from the center of the lower end of the lock member 23. The lock piece 24 is positioned on the front surface of the holder 9 in the retracted position and restricts sliding of the holder 9 forward. The guide plate 25 is provided with a restriction piece 26 that is located above the side surface of the holder 9 in the retracted position and restricts the movement of the holder 9 to the side.

In the attachment / detachment device 1 configured as described above, in the operating state of the automatic tool changer, the holder 9 is in the retracted position, and the rear end of the lock member 23 is cut away from the holder 9 as shown by the solid line in FIG. The upper portion of the insertion hole 11 is closed outside the notch 18 of the guide member 16 by being engaged with the groove 15. In this state, since the lock piece 24 is locked to the front surface of the holder 9 as described above, the forward sliding of the holder 9 is restricted.
Here, when removing the tool from the tool magazine, first, the magazine chain 31 is rotated and the tool T to be removed is indexed and positioned in front of the holder 9, and then the tip of the tapered portion 13 of the operating rod 12 is inserted into the insertion hole 11 of the holder 9. Then, the guide groove 21 is inserted upward. Then, as shown in FIGS. 5 and 6A, the insertion of the operating rod 12 is guided with the locking piece 19 of the notch 18 fitted in the guide groove 21 and is locked by the guide surfaces 20 and 20. The rear end of the member 23 is pushed up. In the middle of this insertion, the operating rod 12 cannot slide forward due to interference between the guide groove 21 and the locking piece 19. Further, due to the curved shape of the guide surface 20, the amount by which the lock member 23 is pushed up is small (because it is at the position of the two-dot chain line 23a in FIG. 5), the lock piece 24 does not release the engagement with the holder 9.

  When the operation rod 12 is further inserted into the insertion hole 11 from here, as shown in FIG. 6 (B), the locking piece 19 relatively enters the back side of the guide groove 21 and the lock member 23 is guided to the guide surface. 20 is pushed up further by 20 and passes over the taper portion 13 and rides on the shaft portion of the operating rod 12. Therefore, the lock piece 24 moves away from the front surface of the holder 9 (the position of the two-dot chain line 23b in FIG. 5). As shown in FIG. 6C, when the lower end of the guide member 16 including the locking piece 19 reaches the slide groove 22, the interference between the locking piece 19 and the guide groove 21 is released. Twelve forward slides are allowed.

Therefore, when the operating rod 12 is translated forward as indicated by the two-dot chain line in FIGS. 4 and 5, the holder 9 also moves forward following this, and the holder 9 grips the rear end of the tool T. At this time, since the lower end of the guide member 16 is in a state of being fitted into the slide groove 22 of the operation rod 12, the operation rod 12 does not come off.
Next, when the operation rod 12 is operated downward so as to push down, as shown in FIG. 7, the lever 5 pivots around the pivot shaft 4 to the replacement position via the holder 9 and the guide shafts 8 and 8, and the holder 9 Projecting sideways and the tool T is removed from the gripping tool 32. Therefore, the tool T can be extracted from the holder 9.

On the other hand, when a tool is mounted, the procedure is reversed. That is, when the tool T is inserted and held in the holder 9 that protrudes laterally together with the lever 5 at the replacement position and the operating rod 12 is pushed up, the lever 5 is rotated to the storage position and the tool T is gripped by the gripping tool 32.
Next, when the operating rod 12 is slid backward, the holder 9 is separated from the tool T gripped by the gripping tool 32 and moved to the retracted position. When the operating rod 12 reaches the notch 18 of the guide member 16, the locking piece 19 is positioned outside the guide groove 21, so that the operating rod 12 can be extracted from the insertion hole 11 here.
In addition, in a state where the operation rod 12 is forgotten to be removed, the back cover of the machine tool cannot be closed, so that the machine tool does not operate as it is. In particular, since the opening / closing state of the back cover is normally monitored by a sensor, it is possible to prevent the machine tool from malfunctioning without forgetting to remove the operation rod 12.

  As described above, according to the attachment / detachment device 1 of the above-described form, the guide portion (notch 18) that is located on the lever 5 on the side of the holder 9 and opens the insertion hole 11 of the operation rod 12 only at the retracted position of the holder 9. ), The guide member 16 is fitted to the outer periphery of the operation rod 12 at a predetermined insertion position from the notch 18 to the insertion hole 11, and the operation rod along the guide member 16 is provided. The slide groove 22 that allows the slide of the operation rod 12 is formed, and the operation rod 12 is fitted into the notch 18 and the operation rod 12 of the guide member 12 in the insertion / removal direction of the operation rod 12. By providing the restricting portions (the locking pieces 19 and the guide grooves 21) that restrict the sliding of the operation rod 12 forward until reaching the position, the operation rod 12 can be inserted and removed only at the retracted position of the holder 9. For tool replacement Holder 9 is located to ensure that the retracted position of the. Therefore, tool replacement can be confirmed reliably without using an electric type such as a limit switch, reliability can be improved, and cost reduction can be expected.

In particular, the guide member 16 is provided so as to cross the upper portion of the insertion hole 11, the guide portion is provided at the lower end of the guide member 16, and the notch 18 that allows the operation rod 12 to pass therethrough is used. And a guide groove 21 provided on the upper surface of the operating rod 12 from the tip to the slide groove 22 through which the locking piece 19 can pass in the axial direction. With a slight design change of the guide member 16 and the operation rod 12, the guide portion and the restricting portion can be easily formed.
When the operation rod 12 is not attached to the lever 9 in the lever 5, the lever 9 is locked to the holder 9 to restrict its advancement, and the holder 9 is attached to the holder 9 to interfere with the operation rod 12 to interfere with the holder 9. By providing the lock member 23 for releasing the engagement with the holder 9, the holder 9 cannot be slid unless the operating rod 12 is securely attached, and erroneous operation is more reliably prevented.

In addition, in the said form, although the locking piece used as a control part and the guide groove are provided 1 each, there may be more than one. In addition, as a restricting portion, a locking piece is provided in the notch of the guide member, and a guide groove is provided in the operation rod, respectively. The same effect can be obtained by connecting a recess into which the protrusion is fitted in the notch of the guide member, and fitting it in position when the operating rod is inserted and removed.
Furthermore, although the guide member is provided so as to cross the middle of the insertion hole by the cutting groove, it may be provided so as to cross the outside of the opening of the insertion hole. In addition, the shape of the guide member is not limited to a plate body, and a rod body or the like may be employed. The same applies to the lock member. The lock piece can be changed to a pin shape or the like, and the lock member can be omitted.
Other appropriate changes such as guiding the holder slide with a single guide shaft using a polygonal cross-section shaft, key connection, spline connection, etc. Is possible.
The attachment / detachment device of the above form is arranged in the notch provided in the plate-shaped magazine frame. However, if the positional relationship with the magazine frame is fixed, for example, the magazine frame seems to be fixed to the bed. In such a case, it may be attached to another component of the machine tool such as being provided on a bed. Of course, in that case, the magazine frame does not have to be plate-shaped and it is not necessary to provide a notch.

It is a disassembled perspective view of an attachment / detachment device. It is explanatory drawing of an attachment / detachment apparatus, the left shows a back surface and the right shows a side surface, respectively. It is a perspective view of an operation rod and a guide member. It is a perspective view which shows the operation procedure of an attachment / detachment apparatus. It is an enlarged view of an insertion hole part. (A)-(C) are explanatory drawings which show the insertion state to the insertion hole of an operation rod, respectively. It is explanatory drawing which shows the state which turned the lever to the exchange position from the front.

Explanation of symbols

  1 ・ ・ Manual tool attaching / detaching device 2 ・ ・ Base 3 ・ ・ Notch 4 ・ ・ Rotating shaft 5 ・ ・ Lever 8 ・ ・ Guiding shaft 9 ・ ・ Holder 11 ・ ・ Insertion hole 12 ・ ・Operation rod, 14, 15 ... Cutting groove, 13 ... Tapered part, 16 ... Guide member, 18 ... Notch, 19 ... Locking piece, 20 ... Guide surface, 21 ... Guide groove, 22 ... Slide groove, 23 ... Lock member, 24 ... Lock piece, 30 ... Magazine chain, 32 ... Grip tool, T ... Tool.

Claims (3)

In a tool magazine of an automatic tool changer comprising a magazine frame and an endless body that is rotatably supported by the magazine frame and has a plurality of gripping tools on the outer periphery and capable of indexing and positioning each tool A manual tool attaching / detaching device provided for attaching / detaching the tool manually,
A retractable member that can be retracted between a storage position in the tool magazine and an exchange position that protrudes to the side of the tool magazine is provided, and the retractable member is retracted rearward from the endless body and the gripping tool. A holder that is slidable between a position and a forward position where the tool held by the gripping tool can be held, and a slide operation of the holder by an operation rod that is detachably attached to a side surface of the holder; While allowing the tool to be attached to and detached from the gripping tool by performing the retracting operation to the replacement position of the retracting member,
A guide member having a guide portion that is located on a side of the holder and that opens the insertion hole of the operation rod only at the retracted position of the holder is provided on the retracting member. The guide member is fitted at a predetermined insertion position from the guide portion to the insertion hole, and a slide groove that allows the operation rod to slide forward along the guide member is formed,
A restriction for fitting the guide portion of the guide member and the operation rod to each other in the insertion / removal direction of the operation rod and restricting the slide of the operation rod forward until the operation rod reaches the predetermined insertion position. A manual tool attaching / detaching device in a tool magazine, characterized in that each part is provided.   The guide member is provided so as to cross the upper part of the insertion hole, the guide portion is provided at the lower end of the guide member, is a notch that allows the operation rod to pass, and the restricting portion is suspended from the center of the notch. 2. The tool according to claim 1, wherein a locking groove is provided from a tip to a slide groove on an upper surface of the operation rod, and is a guide groove through which the locking piece can pass in an axial direction of the operation rod. Manual tool attachment / detachment device for magazines.   When the operating rod is not attached to the holder, the retracting member is locked to the holder to restrict its advancement, and with the attachment of the operating rod to the holder, it interferes with the operating rod and engages with the holder. The manual tool attaching / detaching device for a tool magazine according to claim 1, wherein a lock member for releasing the stop is provided.

Images