JP2559189Y2 - Tool presetter tool attachment / detachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a tool pre-setter for attaching and detaching an ID element in a pull stud in a tool presetter for pre-measurement of specifications such as tool length and tool diameter of a tool. In particular, the ID
The present invention relates to a tool attaching / detaching device for a tool presetter which is suitable when an outer diameter of a read / write head housed in a spindle to be engaged with an element is close to or larger than an outer diameter of the head of the pull stud.

[Prior art] Among tools which are mounted in a spindle of a tool presetter and measure necessary specifications such as tool length and tool diameter in advance,
A device in which an ID element is embedded in the pull stud has recently been used. Therefore, a read / write head for engaging with the ID element is built in the spindle. On the other hand, a tool to be mounted in the spindle needs to be smoothly and reliably mounted and demounted, so that a mounting and demounting device is required.

The same applicant has introduced a tool attachment / detachment device in a tool presetter using an ID element and a read / write head in Japanese Patent Application No. 63-82406. FIG. 4 shows the outline.

A relatively small-diameter read / write head 10A is arranged in contact with the ID element 9 embedded in the head 8b of the pull stud 8 of the tool 7. The holder 48 holding the read / write head 10A is elongated to the right of the drawing (hereinafter, for the sake of explanation, this direction is referred to as rearward, and the reverse is referred to as forward). Connect with piston 50. Also,
The front end face of the holder 48 is in contact with the small diameter portion of the head 8b of the pull stud 8. On the other hand, a collet claw 51 for engaging with the jaw 13A of the pull stud 8 and gripping the pull stud 8 surrounds the holder 48 and the like, is slidably supported in the sleeve 3A in the spindle 6A, and has a rear end. The side is connected to a large piston 53 in a cylinder chamber 52. Large piston for tool 7
This is performed by moving the collet claw 51 by 53. In this connection, the small piston 50 presses the read / write head 10A toward the ID element 9 and pushes out the tool 7 via the holder 48.

[Problem to be Solved by the Invention] In the above-mentioned tool attaching / detaching device, as described above, it is necessary to arrange the collet claw 51 around the read / write head 10A. On the other hand, it is not possible to increase the inner diameters of the spindle 6A and the sleeve 3A in which the collet claws 51 are housed, because of the downsizing of the device structure. Therefore, when the outer diameter of the read / write head 10A is close to the outer diameter of the head 8b of the pull stud 8 or is larger than this, there is no space for accommodating the collet claw 51 in the spindle 6A. Also,
The collet claw 51 has a relatively complicated shape and is expensive. In the case of Japanese Utility Model Application No. 63-82406,
Since an air cylinder composed of the cylinder chamber 49 and the small piston 50 is used to engage the read / write head 10A with the ID element 9, there is a problem that the device structure becomes complicated and the device becomes expensive. When the tool 7 is pulled out from the spindle 6A, as described above, the front end face of the holder 48 is pressed against the relatively small diameter portion of the head 8b of the pull stud 8, and the structure is pressed. There is also a problem that the pressing becomes unstable.

The present invention solves the above problems, and is applied when the outer diameter of the read / write head is close to or larger than the outer diameter of the head of the pull stud. It can be implemented at low cost, and the mechanism for engaging the read / write head with the ID element is made of inexpensive tools. An object of the present invention is to provide a tool attachment / detachment device for a setter.

Means for Solving the Problems In order to achieve the above object, the present invention provides a tool presetter which is detachably inserted into a tapered hole at the front end (or upper end) of a spindle of a tool presetter, and has a tapered diameter end. A tool formed by forming a pull stud whose diameter is enlarged via a jaw at an end protruding from a shoulder surface of the ID stud, wherein an ID element is embedded in the pull stud and the ID element is located at a position facing the ID element. In the tool attachment / detachment device in a tool presetter in which a read / write head having a diameter larger than the outer diameter of the pull stud is stored,
A hollow cylindrical sleeve whose setting position is fixed to the spindle along its axial direction so as to be adjustable, and a sleeve which is slidably supported in the sleeve and has a reduced diameter portion on the tip side on the pull stud side of the tool. And a clamping tube having a moving member fixed inside the rear end side, and the clamping tube disposed on the immovable side of the device and reciprocating the clamping tube along the axial direction via the moving member. Pressing means, a holder housed in the clamping tube and holding a read / write head therein, and a holder disposed in a space between the moving member and the holder in the clamping tube, A spring for pressing the read / write head against the step on the reduced diameter side of the clamp cylinder, and a protrusion protruding from the inner diameter toward the center side from the inner diameter of the tip of the pull stud side of the sleeve. Is formed, a sphere is movably held in the reduced diameter portion of the clamping tube along a direction substantially orthogonal to the axis, and the sphere is clamped to the jaw of a pull stud when clamping a tool. The inner diameter of the protruding end of the protruding portion of the sleeve has a dimension to be pressed against the outer surface of the sphere, and the inner diameter of the sleeve is slightly larger than the dimension obtained by adding twice the diameter of the sphere to the outer diameter of the pull stud. The pressing means is configured such that a sphere held by the reduced diameter portion is pressed against a jaw portion of the pull stud from a position where the tip of the reduced diameter portion of the clamping cylinder presses against the shoulder surface of the tool. The sphere held on the reduced diameter portion side is released from the protruding portion at a position where the tip of the reduced diameter portion abuts on the shoulder surface. Tool that moves to the It constitutes a setter tool mounting device.

[Operation] When a tool is inserted into the spindle and the pressing means is moved to the clamp side, the moving member and the clamp tube connected thereto move, and the sphere held by the clamp tube is moved to the jaw of the pull stud. Lock. In this state, the sphere is pressed by the small diameter portion of the protrusion of the sleeve, so that the sphere presses against the jaw, pulls the pull stud in the clamping direction, and performs tool clamping. With the movement of the clamp tube, the holder in contact with the jaw and the read / write head held by the holder also move in the same direction. The spring is interposed between the holder and the moving member. Since the holder and the moving member move by the same amount in the same direction, the pressing force of the spring does not change, and the holder and the read / write head are stepped on the clamping cylinder side. At a constant pressure.

To extract the tool from the spindle (ie, unclamping), move the pressing means in the unclamping direction,
The moving member and the clamp tube are moved in that direction.
The sphere moves away from the jaw and in a direction inscribed in the large diameter portion of the sleeve. On the other hand, the front end of the clamping tube contacts the shoulder surface of the pull stud, and presses the pull stud in the pull-out direction. Since the pull stud is not interfered with by the sphere, the tool can be pulled out. In addition, the spring is pushed by the movement of the moving member, and the holder and the read / write head also move by the same amount in the same direction, so that the holder and the read / write head are kept pressed by the step on the clamp cylinder side with the same pressing force. Becomes

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the tool 7 is inserted into a tapered hole of the spindle 6. Head of pull stud 8 of tool 7
An ID element 9 is embedded in 8b, and a read / write head 10 is arranged at a position facing the ID element 9 along the axial direction of the spindle 6. The outer diameter of the pull stud 8 is the small end face of the taper shank of the tool 7 to which the pull stud 8 is connected.
The diameter is smaller than the outer diameter of 7a.

The clamping tube 1 is formed of an elongated hollow cylindrical body having a reduced diameter portion 1a formed on the pull stud 8 side and a hollow cylindrical portion 1c which is connected to the stepped portion 1b by expanding its diameter. A plurality of (at least three or more) tapered holes 12 are formed through the reduced diameter portion 1a along the circumference thereof, and the sphere 2 is held in the tapered holes 12. The inner diameter of the reduced diameter portion 1a is equal to or larger than the outer diameter of the head 8b of the pull stud 8, and its outer diameter is twice the diameter of the sphere 2 as the outer diameter of the neck 8a of the pull stud. The diameter is formed to be the same as or larger than the dimension obtained by adding. The sphere 2 is disposed so as to be prevented from falling off by the tapered hole 12 and to just come into contact with the jaw 13 of the pull stud 8 when protruding inside.

The sleeve 3 is formed of an elongated hollow cylindrical body slidably supported by the spindle 6, and is fixed to the spindle 6 by a set screw 14. In addition, a key groove 15 having an appropriate length is recessed at a portion where the set screw 14 is engaged, the sleeve 3 can be moved in the axial direction by that amount, and the fixing position thereof can be adjusted. On the front end side of the sleeve 3 facing the reduced diameter portion 1a of the clamping tube 1, there is provided a projection 16 projecting inward. The small-diameter portion of the protrusion 16 is of a size that can just press the sphere 2 abutting on the jaw 13 of the pull stud 8 toward the jaw 13, and the large-diameter portion corresponding to the base end of the protrusion 16 is The outer diameter of the head 8b of the pull stud 8 is formed such that it can pass through without being interfered by the sphere 2 when the sphere 2 comes into contact with the large diameter portion. That is, the outer diameter of the head 8b of the pull stud 8 is equal to or larger than the dimension obtained by adding twice the diameter of the sphere 2 to the outer diameter. Note that an inclined surface 17 is formed from the small-diameter portion of the projection 16 to the large-diameter portion. A thread 3a is threaded at the rear end of the sleeve 3.

The holder 4 is slidably supported in the clamping tube 1,
The read / write head 10 is stored and held therein. That is, the holder 4 has an opening on the front end side, and the opening end face abuts and engages with the step 1b of the clamping tube 1. Further, the outer edge of the front end of the read / write head 10 inserted from the opening and held by the stepped portion 4a is also formed of a size that can abut and engage the stepped portion 1b. In the present embodiment, the opening end surfaces of the holder 4 and the read / write head 10 are formed so as not to directly contact the step portion 1b but to contact through the turkey 19.
Turquite 19 functions as a thrust bearing. An elongated pipe member 20 is connected to the rear end of the holder 4 by a set screw 21. The lead wire 10a of the read / write head 10 passes through the inside of the pipe member 20.

Next, the structure of the pressing means 5 and the moving member 18 which moves while being connected thereto will be described.

In this embodiment, the pressing means 5 is formed of a manual type. That is, the handle shaft 22 for threading the screw portions 22a and 22b back and forth is attached with its jaw 22c rotatably fitted to the rear end of the sleeve 3, and the axial line of the spindle 6 is moved by the thrust retainer 23. Movement in the direction is restricted. The pipe member 20 penetrates the inner periphery. Handle 24
Is connected to the handle shaft 22 by a key 25, and is fixed by a nut 26 screwed into the screw portion 22b.

The moving member 8 is inserted into the rear end of the hollow cylindrical portion 1c of the clamping tube 1 and is coupled to the clamping tube 1 by a round pin 27 with a step. A screw portion 18a screwed with the screw portion 22a of the handle shaft 22 is threaded on its inner surface, and is slidably supported by the pipe member 20.

There is a gap between the front end face of the moving member 18 and the rear end face of the holder 4, and a spring 28 is provided in the gap. The spring 28 urges the holder 4 and the read / write head 10 held by the holder 4 so as to press the holder 4 toward the step 1b of the clamping tube 1.

At the rear end of the pipe member 20, a block 30 of a detent 29 is fixed by a set screw 31. The detent 29 can move in the axial direction of the spindle 6 but is supported by the rotation thereof being restrained by the stationary side 32 (bed) of the apparatus.

The spindle 6 is pivotally supported by a quill 35 via bearings 33 and 34, and the quill 35 is supported on a stationary side 32 (bed). A worm wheel formed on the outer periphery of the spindle 6
The spindle 6 is rotated by the worm 37 meshing with 36.

 Next, the operation of the present embodiment will be described in more detail.

FIG. 1 shows a state in which the tool 7 is clamped in the spindle 6. That is, when the handle 24 of the pressing means 5 is rotated in the clamping direction (for example, counterclockwise), the handle shaft 22 is rotated, but the axial movement is restricted by the thrust retainer 23, so that the screw is engaged with this. Moving member 18
Moves toward the clamp side in the axial direction (to the right of the drawing, that is, toward the rear). Accordingly, the clamping cylinder 1 connected to the moving member 18 by the stepped round pin 27 advances backward in the sleeve 3. For this reason, the spherical body 2 held in the clamping tube 1
Abuts the jaws 13 of the pull studs 8 of the tool 7 inserted in the spindle 6 as shown. In this state,
As described above, the small diameter portion of the protrusion 16 of the sleeve 3 is
The pull stud 8 is pushed inward to press the tool 7 toward the jaw 13, and the tool 7 is clamped.

When the clamping cylinder 1 moves backward, the holder 4 and the read / write head 10 that are in contact with the step portion 1b via the turkey 19 also move backward by the same amount. Therefore, the mounting length of the spring 28 provided between the holder 4 and the moving member 18 does not change, and the holder 4 and the like are still pressed toward the step portion 1b of the clamping cylinder 1. Therefore, the engagement state between the ID element 9 and the read / write head 10 is maintained as it is. Although the pipe member 20 moves with the movement of the holder 4, the rotation is prevented by the detent 29, and each part is smoothly moved.

Next, the unclamping operation of the tool 7 will be described. Second
The figure is a partially enlarged axial sectional view showing the state.

When the handle 24 is rotated in the direction opposite to that of the clamp, the moving member 18 and the clamp tube 1 move leftward (forward) in the figure.
Therefore, as shown in FIG.
Goes forward and abuts the shoulder surface 11 of the pull stud 8. In this state, the sphere 2 comes off the jaw 13 of the pull stud 8.
The sphere 2 is pushed out along the inclined surface 17 of the projection 16 to a position where it can contact the large diameter portion of the sleeve 3.

2, the spring 28 presses the holder 4 and the read / write head 10 advances to a position where it comes into contact with the end face of the head 8b of the pull stud 8. Further, by turning the handle 24, the shoulder surface 11 of the pull stud 8 is pushed, so that the tool 7 can be pulled out from the spindle 6. The sphere 2 is, as described above,
Since the head 8b can be pushed out to the position shown in FIG. 2, the head 8b of the pull stud 8 does not interfere with the sphere 2 and has a reduced diameter portion 1a.
Can be moved in the pulling-out direction along the inner circumference of the. When the tool 7 is pulled out, the holder 4 and the read / write head 10 advance to a position where the holder 4 and the read / write head 10 come into contact with the step 1b of the clamping tube 1 by the pressing force of the spring 28. Thus, the unclamping operation of the tool 7 ends.

As described above, the tool 7 is reliably clamped and unclamped by simply rotating the handle 24 in the forward and reverse directions, and the read / write head 10 is always held at a constant pressing force by the spring 28 by the spring 28. It comes into contact with the first step 1b and is always kept in a stable state.

FIG. 3 is an axial sectional view showing another embodiment of the present invention.
This embodiment is different from the above-described embodiment in that the pressing means 5A and the moving member 13A moved by the pressing means 5A. In the figure, the first
Those having the same reference numerals as those in the drawings indicate the same thing or the same function,
The description is omitted.

The pressing means 5A is formed of an air cylinder type in this embodiment. That is, the rear end of the sleeve 3 fixed to the spindle 6 by the set screw 14 has a cylinder chamber 38 inside.
Are connected via a bracket 41. A piston 42 is housed in the cylinder chamber 38, and a front end side of the piston 42 is screwed into the moving member 18A, and a double nut 43 is provided.
Is fixed by An outer cylinder 44 of a rotary joint is connected to the housing 40, and a pipe 4 communicating with the inside of the cylinder chamber 38 is provided.
5,46 are combined respectively. In addition, a rotary joint body 47 whose rotation is restricted by the detent 29 abutting on the stationary side 32 of the device is mounted in the outer cylinder 44. The elongated pipe 39 surrounding the lead wire 10a of the read / write head 10 is held by a rotary joint body 47 by a metal fitting 54.

With the above structure, the tool 7 is clamped and unclamped by moving the piston 42 of the pressing means 5A back and forth in the same manner as in the previous embodiment.

[Effects of the Invention] According to the present invention, the following remarkable effects are obtained.

1) Even if the outer diameter of the read / write head is close to or larger than the outer diameter of the head of the pull stud of the tool,
By the ball grip type clamping method using the sphere of the present invention, the attachment and detachment of the tool can be performed reliably and easily.

2) The ball grip type clamp system has a simple structure and can be implemented at a low cost as compared with a system using a collet claw.

3) The engagement between the read / write head and the ID element is performed by the pressing force of an inexpensive spring.
It is implemented inexpensively, and the cost of the apparatus can be reduced.

4) A structure that directly presses the shoulder surface of a relatively wide pull stud at the front end of the clamping tube allows a sufficient pushing force to be applied to the tool, and ensures that even heavy tools can be securely and smoothly attached and detached. You can do it.

[Brief description of the drawings]

FIG. 1 is a sectional view of a shaft according to one embodiment of the present invention, FIG. 2 is a partially enlarged sectional view of a shaft for explaining a state in which a tool is pulled out of one embodiment, and FIG. FIG. 4 is an axial sectional view of a conventional tool attaching / detaching apparatus. 1 ... clamping cylinder, 1a ... reduced diameter part, 1b ... stepped part, 1c ...
... hollow cylindrical part, 2 ... spherical body, 3 ... sleeve, 4 ... holder, 4a ... stepped part, 5, 5A ... pressing means, 6 ... spindle, 7 ... tool, 8 ... pull stud , 8a ... neck, 8b ... head, 9 ... ID element, 10 ... read / write head, 10a ... lead wire, 11 ... shoulder surface, 12 ... tapered hole, 13, 22c ... jaw Part, 14, 21, 31… Set screw, 15… Keyway, 16… Projecting part, 17… Inclined surface, 18, 18A… Moving member, 19… Turquite, 20… Pipe member, 22 …… Handle shaft, 22a, 22b …… Thread part, 23 …… Thrust holder, 2
4 ... handle, 25 ... key, 26 ... nut, 27 ... stepped round pin, 28 ... spring, 29 ... rotation stop, 30 ...
Piece, 32: Immobile side (bed), 33, 34 ... Bearing, 35 ...
Quill, 36 ... warm wheel, 37 ... warm.

Claims (1)

(57) [Scope of request for utility model registration] 1. A tool presetter, which is removably inserted into a tapered hole at a front end (or upper end) of a spindle of a spindle, and expands through a jaw to an end protruding from a shoulder surface of a tapered reduced end. A tool formed with a pull stud, wherein an ID element is embedded in the pull stud, and a read / write head having a diameter larger than the outer diameter of the pull stud is housed at a position facing the ID element. The tool mounting and dismounting device in a tool presetter, wherein a hollow cylindrical sleeve whose setting position is fixed to the spindle so as to be adjustable along an axial direction thereof, the tool being slidably supported in the sleeve, A clamping tube formed by forming a reduced diameter portion on the front end side of the pull stud side and fixing a moving member inside the rear end side, and the clamping tube provided on the immovable side of the device via the moving member. The tube Pressing means for reciprocating along the axial direction, a holder housed in the clamping tube and holding a read / write head therein, and a space between the moving member and the holder in the clamping tube A spring that presses the read / write head in the holder against a step on the reduced diameter portion side of the clamp cylinder, and the tip side of the sleeve on the pull stud side has a center from its inner diameter. A projecting portion projecting toward the side is formed, a sphere is movably held in the reduced diameter portion of the clamping tube along a direction substantially orthogonal to the axis, and the sphere is a jaw of a pull stud. The inner diameter of the protruding end of the protruding portion of the sleeve has a dimension that can be pressed against the outer surface of the sphere when the tool is pressed against the ball, and the inner diameter of the sleeve is equal to the outer diameter of the pull stud. Is formed to have a slightly larger diameter than the dimension obtained by adding twice the diameter of the tool, and the pressing means moves from the position where the tip of the reduced diameter portion of the clamping cylinder presses against the shoulder surface of the tool to the reduced diameter portion. The clamped cylinder can reciprocate to a position where the held sphere presses against the jaw of the pull stud, and the sphere held on the reduced diameter portion side has a tip of the reduced diameter portion. A tool attachment / detachment device for a tool presetter, wherein the tool attachment / detachment device moves to a position released from the protrusion at a position in contact with a shoulder surface.