JPH0546802Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a device for attaching tools such as a drill, reamer, cutting tool, grinding wheel, etc. to a machine tool.

BACKGROUND OF THE INVENTION A tool mounting device is configured to include a tool holder for holding a tool. The tool holder may be attached directly to the main spindle of a machine tool and constitute a mounting device together with a part of the spindle, or may be attached via an adapter and constitute a mounting device together with the adapter. In any case, it is desirable that the device can be easily and quickly attached to and detached from the main shaft or adapter. Therefore, in the tool mounting device described in Japanese Patent Publication No. 57-1379, when attaching a tool holder to the main shaft of a machine tool, the tool holder can be mounted by inserting the tool holder into the main shaft and then rotating it by a certain angle. It is like that. This tool mounting device is the 20th
It is constructed as shown in FIGS. 26 to 26.

The tool holder 200 of this device has a cylindrical shape,
It has a tool holding part 202 at one end and a fitting part 204 at the other end, and two first protrusions 206 extending in the radial direction are formed on the outer peripheral surface of the fitting part 204. From 206, the tool holding part 202
Two second protrusions 208 are formed that extend in the radial direction from the side. The protrusions 206 and 208 are formed in pairs at diametrically separated positions, and are also formed with a phase shift in the circumferential direction. A collar 210 is fitted into the collar 208 in an axially extending engagement groove 212 formed on its inner peripheral surface, and is urged toward the first protrusion 206 by a spring 214 .

When attaching the tool holder 200 to the main shaft 216, the fitting part 204 is inserted into the main shaft 216 with the first protrusion 206 and the engagement notch 218 formed at the open end of the main shaft 216 aligned in phase. . At this time, the axial protrusion 220 of the collar 210
16, the collar 210 is moved relative to the tool holder 200 in the axial direction against the urging force of the spring 214. As a result, the first protrusion 206 passes through the engagement notch 218 and the main shaft 21
The main shaft 216 is fitted into an annular groove 222 formed on the inner circumferential surface of the main shaft 216, and becomes capable of engaging with an inward flange 224 formed at the open end of the main shaft 216. From this state, the tool holder 200 is rotated by a certain angle, so that the first protrusion 206 is attached to the inward flange 20.
4, and is irremovably engaged with the axial projection 22 in the axial direction.
0 coincides with the engagement notch 218 of the main shaft 216, the axial protrusion 220 is fitted into the engagement notch 218 by the biasing force of the spring 214, and the collar 210 is in a state where it cannot rotate relative to the main shaft 216. Become. This collar 210 is attached to the tool holder 200
Since the tool holder 200 cannot rotate relative to the tool holder 200,
As a result, the tool 226 held by the tool holder 202 becomes unable to rotate relative to the main shaft 216, and the attachment of the tool 226 is completed.

According to this mounting device, the tool 226 together with the tool holder 200 can be easily mounted on the main shaft 216.
In addition to being removable, since the engaging notch 218 and the inward flange 224 are formed at the open end of the main shaft 216, the main shaft 216 is easier to manufacture than when these are formed deep inside the main shaft 216. There are advantages.

Problems to be Solved by the Invention However, in this tool mounting device, the tool holder 200 has two radial protrusions 206, 2
Since it is necessary to form two sets of 08, there is a problem that manufacturing is troublesome. In order to provide a radial protrusion on the outer circumferential surface of the tool holder 200, the outward flange portion is cut away leaving a portion that will serve as the radial protrusion. This requires cutting out much of the flange, which is cumbersome and increases costs. Furthermore, in the above-mentioned mounting device, since two sets of radial protrusions are provided adjacent to each other in the axial direction, there is a problem in that the cutting direction etc. are restricted and it is difficult to manufacture.

In addition to the axial protrusion 220 that fits into the engagement notch 218 of the main shaft 216, the collar 210 also includes a groove 220 that engages with the second protrusion 208 of the tool holder 200.
12, the shape becomes complicated and the number of machining steps increases, and the thickness becomes hot and the diameter of the tool mounting device becomes large.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides (a) a cylindrical inward flange that faces radially inward and is formed at the open end of the cylindrical shape; (b) a rotating body having an engaging notch formed inward from the end surface in the axial direction with a depth equal to or greater than the thickness of the flange and rotating around its own center line; and (b) a cutting tool at one end. and a fitting part that can be fitted inside the rotating body at the other end, and the fitting part is fitted to the rotating body on the outer peripheral surface of the fitting part. After passing through the engagement notch, a radial protrusion that engages with the inward flange is formed by rotation at a predetermined angle, and the end face of the open end of the rotating body is located at a position closer to the tool holder than the radial protrusion. (c) a tool holder having a contact surface formed therein that contacts the tool holder; and a collar having an axial protrusion that is biased toward the fitting part by a spring and protrudes in the axial direction from the end face of the fitting part with a width that allows the fitting to be made just after the engagement notch. In the tool mounting device, a flange portion extending radially outward is provided between the tool holding portion of the tool holder and the radial protrusion, and the end surface of the flange portion on the radial protrusion side is connected to the abutment surface. In addition, an engagement groove extending in the axial direction is provided in the flange portion, and the axial protrusion of the collar is engaged with the engagement groove to prevent relative rotation between the collar and the tool holder.

Function and Effect As described above, in the tool mounting device of the present invention,
The tool holder is provided with an engagement groove in place of the second protrusion 208, and only one set of radial projections is required, making it possible to manufacture the tool holder easily and at low cost. Providing an axially extending groove in the flange portion is easier than providing a radial protrusion, and therefore the tool holder is easier to manufacture.

In addition, since only the axial protrusion needs to be provided on the collar, the number of processing steps can be reduced compared to the case where both the axial protrusion and the engagement groove are provided, and the thickness can be reduced. The mounting device can be made smaller in diameter.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

The tool mounting device of this embodiment includes an adapter 10 (see FIG. 4) as a rotating body that is attached to the main shaft of a machine tool (not shown), and a sleeve 12 as a tool holder that is attached to and detached from the adapter 10.
(see FIG. 2) and a collar 14 that is fitted on the outside of the sleeve 12 and transmits the rotation of the adapter 10 to the sleeve 12. The adapter 10, sleeve 12, and collar 14 will be explained below.

The adapter 10 is for a machining center, and a bottleneck 18 is formed in the center in the longitudinal direction to be held when changing tools.From the rear end surface of the bottleneck 18, there is a tapered shank portion 20 whose diameter becomes smaller toward the rear. While the straight part 22 with a circular cross section extends out from the front end surface.
is being extended. Taper shank portion 20
has a female screw hole 2 opened on the rear end surface of the adapter 10.
4 is formed, and a pull stud is screwed into the female threaded hole 24. When attaching the adapter 10 to the main shaft, the pull stud is pulled in by a drawbar (not shown), and the tapered shank portion 20 is fitted into a tapered hole formed in the main shaft.
A notch 26 formed in the bolt neck 18 is engaged with a protrusion provided at the tip of the main shaft, so that it is fixed to the main shaft and rotated together with the main shaft.

The straight portion 22 is formed with a bottomed fitting hole 30 that is centered on the axis of the adapter 10 and opens at the front end surface of the adapter 10.
An annular groove 32 is formed in the opening side of the straight part 22, and thereby an inward flange 34 facing inward in the radial direction is formed at the opening end of the straight part 22. As shown in FIG. 5, the straight portion 22 also has an engagement notch 36 that extends in the axial direction from the end surface of the open end and has a depth that is deeper than the thickness of the inward flange 34 and reaches the annular groove 32. 4
They are formed at equal angular intervals.

The sleeve 12 has a cylindrical shape as shown in FIG. A female screw hole 40 is formed in the. A tool positioning block 42 is fitted into the female threaded hole 40 so as to be movable in the axial direction. A groove 48 into which the square portion 46 of the tool 44 is fitted is formed in the block 42, and a drive pin 50 is press-fitted at right angles to the center line of the sleeve 12, and both ends of the drive pin 50 are connected to the peripheral wall of the sleeve 12. The block 42 is fitted into a pair of elongated holes 52 formed in the sleeve 12, thereby preventing the block 42 from rotating relative to the sleeve 12. Block 42 of female threaded hole 40
A screw member 54 is screwed into the rear portion, and by engaging a tool with this screw member 54 and rotating it, the sleeve 12 of the block 42 can be removed.
The insertion depth of the tool 44 can be adjusted by changing the position relative to the tool 44. Further, the front inner circumferential surface of the sleeve 12 has a tapered inner circumferential surface 56 whose diameter increases toward the opening side, and a collet 58 is fitted into this tapered inner circumferential surface 56. An operation nut 62, which is fitted to the front end of the sleeve 12 through a ball 60 so as to be relatively rotatable and immovable in the axial direction, is screwed onto the protruding end of the collet 58 from the sleeve 12. By rotating the nut 62, the diameter of the collet 58 is reduced or expanded, and the tool 44 inserted into the sleeve 12 is gripped or released. Collection 5
8. The operating nut 62 and the like constitute a tool holding section.

The outer peripheral surface of the fitting portion 38 of the sleeve 12 has a third
As shown in the figure, four radial protrusions 63 are formed at equal angles in the circumferential direction. Protrusion 6
3, from the outward flange portion 64 formed on the sleeve 12 to each of two planes 65 that are parallel to the axis of the sleeve 12 and intersect with each other, as shown by the two-dot chain line in FIG. This is the portion left within the corner formed by the two planes 65 by cutting out the arcuate portion 66 defined by the outer peripheral surface of the flange portion 64. The distances of these flat surfaces 65 from the center of the flange portion 64 are equal, and the fitting portion 38 has four arcuate portions 66 defined by each of the four flat surfaces 65 from the flange portion 64 and the outer peripheral surface of the flange portion 64. By cutting out the four protrusions 63 of the same size are formed at equal angles apart. The diameter of the flange portion 64 is large enough to fit into the annular groove 32 provided in the adapter 10 , and the arcuate portion 66 has a radial protrusion 63 that protrudes from the outer peripheral surface of the sleeve 12 and fits into the annular groove 32 . and is cut to a size that allows it to pass through the engagement notch 36 of the adapter 10.

In addition, the radial protrusion 6 on the outer peripheral surface of the sleeve 12
A flange portion 67 that extends outward in the radial direction is formed in a portion on the front side of the portion where 3 is formed. The end surface 6 of this flange portion 67 on the protrusion 63 side
8 is a contact surface that comes into contact with the front end surface of the sleeve 12 when the sleeve 12 is fitted into the adapter 10. The flange portion 67 has an engagement notch 3 extending in the axial direction and formed in the adapter 10.
Two engaging grooves 70 having the same width as 6 are formed between adjacent radial protrusions 63 at positions spaced apart in the diametrical direction.

The collar 14 has an operating nut 62 and a flange portion 6.
It is located between 7 and 7. The collar 14 generally has the same cylindrical shape, but the center hole consists of a large diameter hole 71 and a small diameter hole 72. It is fitted onto the outer circumferential surface of 12. The collar 14 is biased toward the flange portion 67 by a coiled spring 74 as a spring member disposed between the shoulder surface 73 and the operating nut 62 . The rear end surface of this collar 14 includes an engagement groove 70 formed in the flange portion 67;
Two axial protrusions 76 are formed that protrude in the axial direction and have a width that allows for fitting into the engagement notch 36 formed in the adapter 10, and the axial protrusions 76 and the engagement groove Collar 14 by engagement with 70
Relative rotation between the sleeve 12 and the sleeve 12 is prevented.
The axial protrusion 76 allows the sleeve 12 to
It has a length that allows it to fit into the engagement notch 36 of the adapter 10 with the end surface 68 in contact with the front end surface of the adapter 10.

In the tool attachment device configured as described above, the sleeve 12 is attached to and removed from the adapter 10 while holding the tool 44. First, the seventh
As shown, the radial protrusion 6 of the sleeve 12
3 and the engagement notch 36 of the adapter 10, insert the fitting part 38 into the fitting hole 3 of the adapter 10.
Insert into 0. At this time, since the axial protrusion 76 of the collar 14 is located between the radial protrusions 63,
As the sleeve 12 is inserted, the collar 14 comes into contact with the front end surface of the adapter 10, but as the sleeve 12 is further inserted, the collar 14 is pressed against the spring 74.
The radial protrusion 63 is moved in the axial direction relative to the sleeve 12 against the biasing force of , thereby allowing the radial protrusion 63 to pass through the engagement notch 36 and become fitted into the annular groove 32 . When the sleeve 12 is rotated from this state, the radial protrusion 63 irremovably engages with the inward flange 34 in the axial direction, and at the same time this engagement is completed, the spring 74 biases the axial protrusion 76 As shown in FIG. 1, the collar 14 is fitted into the engagement notch 36, and the collar 14 becomes unrotatable relative to the adapter 10, and the sleeve 12, and by extension the tool 44, become unrotatable relative to the adapter 10. Then, the tool 44 is attached to the main shaft.

When removing the sleeve 12 from the adapter 10, the collar 14 is pulled away from the flange portion 67 against the biasing force of the spring 74, and rotated with the axial protrusion 76 disengaged from the engagement notch 36. . Once the radial protrusion 63 and the engagement notch 36 are in phase, the sleeve 12 can be pulled out from the adapter 10.

In this embodiment, the axial protrusion 76 of the collar 14 is fitted into the engagement groove 70 of the sleeve 12 and the engagement notch 36 of the adapter 10, so that rotation of the adapter 10 is transmitted to the sleeve 12. The sleeve 12 only needs to be provided with one set of radial protrusions 63 and an easily formed engagement groove 70, and the collar 14 only needs to be provided with an axial protrusion 76. The device can be manufactured easily and at low cost.

Further, since the four radial protrusions 63 are provided at equal angular intervals, the rotational operation angle of the sleeve 12 is smaller than in the case where two protrusions are provided, and there is an advantage that the sleeve 12 can be easily operated.

Further, since the radial protrusion 63 is formed by cutting the flange portion 64 straight along four planes parallel to the axis of the sleeve 12, it is easy to manufacture. Also, the manufacturing cost of the tool mounting device can be reduced.

Furthermore, the sleeve 12 is attached to the adapter 10,
Since the contact is made at the flange portion 67, the contact area is large, and there is an advantage that the axial load received via the tool can be sufficiently received by the adapter 10.

In the above embodiment, the adapter 10 is integrated, but as in the adapter 100 shown in FIG. , inward flange 104 and engagement notch 106
It may also consist of an auxiliary member 108 formed with. The auxiliary member 108 has a cylindrical shape, and one opening extends radially inward to form an inward flange 104, and the flange 104 and the engagement notch 106 are formed. It is removably secured to the body 102 by a reamer bolt 110 at the opposite end. The open end of the adapter is easily damaged because the sleeve is repeatedly attached and removed, so the auxiliary member 108 allows the open end of the adapter to be removed.
With this structure, it is easy to form the inward flange 104 and the engagement notch 106, and if the opening end of the adapter is damaged, only the auxiliary member 108 needs to be replaced, which is much easier than replacing the entire adapter. This reduces costs.

In this invention, the main shaft of the machine tool constitutes a rotating body,
It can also be applied to a tool mounting device in which a sleeve is attached to and removed from the rotating body, but in particular in that case it is not necessary to form an inward flange or engagement notch on the main shaft. Since this is not easy, it is effective to form them into auxiliary members.

Further, in the above embodiment, the sleeve 12 was formed with four radial projections 63, but two radial projections 122 may be formed as in the sleeve 120 shown in FIG. 9. These radial protrusions 122 are formed by cutting out four arcuate sections 126 from an outwardly facing flange portion 124 formed on the sleeve 120, and then forming two diametrically spaced protrusions of the four protrusions thereby formed. pcs, sleeve 120
perpendicular to the plane containing the axis of the projection and the fitting part 1
It is formed by cutting at a plane 129 passing through the line of intersection with 28. When two radial protrusions 122 are formed in this manner, engagement notches 132 are formed in two diametrically apart locations in the adapter 130, as shown in FIG.

Furthermore, one of the radial projections 122 may be removed to provide only one radial projection. In this case, by providing one engagement notch in the adapter and restricting the direction of rotation of the sleeve during attachment to one direction, the phase between the sleeve and the adapter can be uniquely determined.

Note that the number of radial protrusions on the sleeve is not limited to one, two, or four, and any desired number can be provided.

Still another embodiment of the present invention is shown in FIGS.
It is shown in Figure 5. In this embodiment, the radial protrusion of the sleeve 134 that engages with the inward flange 138 of the adapter 136 is provided on a cylindrical member 140 that is separate from the sleeve 134, and the sleeve 134 is attached to the adapter 1.
36 without any axial clearance. As shown in FIG. 12, radial protrusions 142 are provided on the outer circumferential surface of the cylindrical member 140 at two locations separated from each other in the diametrical direction. The end surface of the radial protrusion 142 that becomes the front side when fitted into the sleeve 134 is a cylindrical member 140.
The contact surface 143 is perpendicular to the axis of the contact surface 143, and chamfered portions 144 are formed at both ends of the contact surface 143.

Further, the center hole of the cylindrical member 140 is stepped, and the front part is a fitting hole part 147 that fits into the fitting part 146 of the sleeve 134, and the rear part is a fitting hole part 147. 147, and the holes 147 and 1
48, an inclined surface 149 is formed.
On the other hand, the sleeve 134 is formed with an outward flange portion 150 that contacts the front end surface of the adapter 136, and an annular groove 152 with a semicircular cross section is located at a certain distance rearward from the flange portion 150. is formed.

A spring 153 is disposed between the cylindrical member 140 and the sleeve 134. The spring 153 is a coil spring wound in an annular shape and connected at both ends. This spring 153 is assembled as follows. First, the cylindrical member 140
is fitted into the fitting part 146 from the rear side of the sleeve 134 (not fitted with the adapter 136), and the flange part 150 is inserted as shown in FIG.
The spring 153 is fitted into the annular groove 152 from the annular space formed between the rear end of the cylindrical member 140 and the rear edge of the annular groove 152. Then, as shown in FIG.
The inclined surface 149 of the cylindrical member 140 is connected to the spring 1.
After retreating until it contacts 53, the cylindrical member 1
A radial through hole 154 formed in the side wall of 40
A pin 156 is press-fitted into a radial hole 155 formed in the sleeve 134 through the sleeve 134 . Through hole 154
has a diameter larger than the diameter of the radial hole 155, and when the pin 156 is press-fitted into the radial hole 155, the cylindrical member 140 can move a short distance in the axial direction with respect to the sleeve 134 and cannot rotate. Become.

When the sleeve 134 is attached to the adapter 136, the radial protrusion 142 and the adapter 136
The sleeve 134 is inserted into the adapter 136 while being aligned with the two engagement notches 157 formed in the sleeve 134. At this time, as in the embodiment shown in FIGS. 1 to 7, first, the axial protrusion 1 of the collar 158 fitted into the sleeve 134 is
59 comes into contact with the front end surface of the adapter 136, and by further inserting the sleeve 134 from this state, the flange portion 150 comes into contact with the front end surface of the adapter 136. At this time, the cylindrical member 140 is a small distance forward of radial projection 142 engaging inwardly directed flange 138 of adapter 136 . However, when the sleeve 134 is rotated from this state, the cylindrical member 140 is guided by the chamfered portion 144 of the radial protrusion 142 and moves rearward with respect to the sleeve 134 while compressing the spring 153. Thereby the radial protrusion 14
2 fits into the annular groove 160 of the adapter 136 and becomes engaged with the inward flange 138 as shown in FIG.

When the cylindrical member 140 moves rearward in this way and the radial protrusion 142 fits into the annular groove 160, the spring 153 compressed by the cylindrical member 140 moves toward the inclined surface 149 as shown in FIG. The cylindrical member 140 is deformed into an elliptical cross-sectional shape by being sandwiched between
is in a state where it is biased forward. The radial protrusion 142 is strongly pressed against the inward flange 138 by this biasing force, and the inward flange 138 is sandwiched between the flange portion 150 and the radial protrusion 142.
The sleeve 134 is attached to the adapter 136 without any clearance in the axial direction.

If the sleeve 134 is attached to the adapter 136 without any axial clearance in this way, chatter will not occur during machining, and interrupted machining, reaming, etc. can be performed with high precision.

Note that, as shown in FIG. 16, a wave spring 163 may be provided between the cylindrical member 161 and the sleeve 162. The wave spring 163 is prevented from coming off by a retaining ring 164, and the sleeve 162
When the cylindrical member 161 is rotated after being fitted into an adapter (not shown), the cylindrical member 161 moves back while compressing the wave spring 163, allowing the radial protrusion 165 to fit into the annular groove of the adapter. Cylindrical member 1
61 is biased by the wave spring 163, the sleeve 162 is attached to the adapter without any axial clearance.

Furthermore, as shown in FIGS. 17 and 18, the cylindrical member 168 is provided with a plurality of slits 169 extending in the axial direction, and the elastic force of the cylindrical member 168 itself allows the sleeve 170 to be inserted into the adapter 171 with an axial clearance. It is also possible to attach it without having to do so. Two radial projections 172 are formed on the outer peripheral surface of the cylindrical member 168, and one slit 169 is formed on each side of each radial projection 172. Further, a chamfered portion 173 similar to the chamfered portion 144 is formed on the radial protrusion 172, and the front end surface is an inclined surface 174 that slopes rearward toward the outer circumference of the cylindrical member 168. Note that the center hole of the cylindrical member 168 is a fitting hole 177 that is entirely fitted into a fitting portion 176 of the sleeve 170.

After this cylindrical member 168 is fitted into the fitting part 176 from the rear side of the sleeve 170, a pin (not shown) is press-fitted therein, and the cylindrical member 168 is made immovable in the axial direction and unrotatable with respect to the fitting part 176. Of the portion of the fitting portion 176 into which the cylindrical member 168 is fitted, two portions separated in the diametrical direction are each cut out in the axial direction with a width larger than the circumferential length of the radial protrusion 172. 179 is formed. This notch 179 allows the slit 16 of the cylindrical member 168 to
9 is allowed, and the cylindrical member 168 has a radial protrusion 17 in the sleeve 170.
2 is fitted so as to be positioned on the outside of the notch 179.

When assembling the sleeve 170 to the adapter 171, after the flange portion 181 of the sleeve 170 comes into contact with the front end surface of the adapter 171, when the sleeve 170 is turned, the radial protrusion 172 is guided by the chamfered portion 173 and fits into the annular groove 182. fit inside. At this time, the cylindrical member 168 is inserted into the slit 16.
The diameter is reduced at 9 to allow the radial protrusion 172 to fit into the annular groove 182. Radial protrusion 172
When the cylindrical member 168 is fitted into the annular groove 182, the inward flange 1
83 against the flange portion 181 , and also the inward flange 183 is strongly pressed against the flange portion 181 of the sleeve 170 due to the slope effect based on the engagement between the inclined surface 174 and the inclined surface 184 formed inside the inward flange 183 . Press. As a result, the sleeve 170 can be attached to the adapter 171 without any gaps in the axial direction.

In addition, as shown in FIG. 19, the sleeve 1
By forming a circumferential slit 188 in a radial protrusion 187 integrally provided on the sleeve 86, an axial gap between the sleeve 186 and the adapter 189 can be eliminated. A chamfer similar to the chamfer 144 is formed on the radial protrusion 187, and the radial protrusion 187 and the sleeve 1
The distance between 86 and flange portion 191 is made slightly smaller than the thickness of inward flange 192. Therefore, when the sleeve 186 is attached to the adapter 189, the radial projection 187 is guided by the chamfer and fitted into the annular groove 194, and the slit 188 of the radial projection 187
The spring piece 196 consisting of the more forward portion is deflected to the rear. Therefore, when the radial protrusion 187 is fitted into the annular groove 192, the elastic force of the spring piece 196 causes the inward flange 192 to move toward the sleeve 1.
The sleeve 186 is pressed against the flange portion 191 of the sleeve 186, and the sleeve 186 is attached to the adapter 189 without any gap in the axial direction.

Although not illustrated in detail, the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a state in which an axial protrusion of a collar of a tool mounting device according to an embodiment of the present invention is fitted into an engagement groove of a sleeve and an engagement notch of an adapter. FIG. 2 is a front view (partially in section) showing the sleeve fitted with the collar, and FIG. 3 is a right side view thereof. FIG. 4 is a front sectional view showing the adapter, and FIG. 5 is a left side view thereof.
FIG. 6 is a right side sectional view showing a portion of the sleeve where the radial projection is formed, and FIG. 7 is a left side sectional view showing the radial projection fitted into the engagement notch of the adapter. FIG. 8 is a front sectional view showing another embodiment of the adapter. FIG. 9 is a right side sectional view showing another aspect of the radial protrusion of the sleeve, and FIG. 10 is a left side sectional view showing the radial protrusion of the sleeve fitted into the engagement notch of the adapter. It is. FIG. 11 is a front view (partially in section) showing a tool mounting device which is still another embodiment of the present invention. FIG. 12 is a front view (partially in section) showing the cylindrical member forming the radial projection. FIG. 13 is a partial front sectional view for explaining the assembly work of the cylindrical member to the sleeve, and FIG. 14 is a partial front sectional view showing another part of the state after the assembly is completed. be. 15th
The figure is a partial front sectional view showing the sleeve attached to the adapter. FIG. 16 is a partial front sectional view of yet another embodiment of the present invention. FIG. 17 is a front view showing another aspect of the cylindrical member, and FIG. 18 is a front sectional view showing the main part of the sleeve with the cylindrical member attached to the adapter. FIG. 19 is a front cross-sectional view showing the main parts of a sleeve having a radial protrusion according to still another embodiment, which is attached to an adapter. FIG. 20 is a front view (partially in section) showing a conventional tool mounting device. FIG. 21 is a front sectional view showing the sleeve of the device, and FIG. 22 is a left side view thereof. FIG. 23 is a front sectional view of a main shaft constituting a conventional device, and FIG. 24 is a left side view thereof. FIG. 25 is a side view showing the collar fitted into the sleeve of the conventional device, and FIG.
5 is a cross-sectional view in FIG. 5. FIG. 10...adapter, 12...sleeve, 14...
... Collar, 32 ... Annular groove, 34 ... Inward flange, 36 ... Engagement notch, 38 ... Fitting part, 44
. . . Tool, 58 . 70...Engagement groove, 74
... Spring, 76 ... Axial projection, 100 ...
...adapter, 102 ... main body, 104 ... inward flange, 106 ... engagement notch, 108 ... auxiliary member, 120 ... sleeve, 122 ... radial projection, 124 ... flange section, 126 ... arcuate Part, 128... Fitting part, 130... Adapter, 1
32...Engagement notch, 134...Sleeve, 136
...Adapter, 140...Cylindrical member, 142...
...Radial projection, 143...Abutment surface, 144...
Chamfered part, 146... Fitting part, 150... Flange part, 153... Spring, 157... Engagement notch, 158... Collar, 159... Axial projection,
160... annular groove, 161... cylindrical member, 16
2... Sleeve, 163... Wave spring, 164...
Retaining ring, 165... Radial projection, 168... Cylindrical member, 169... Slit, 170... Sleeve, 171... Adapter, 172... Radial projection, 173... Chamfered portion, 174... Inclined surface ,
176... Fitting portion, 179... Notch, 181...
Flange part, 182... Annular groove, 183... Inward flange, 184... Inclined surface, 186... Sleeve, 187... Radial projection, 188... Slit, 189... Adapter, 191... Flange part, 192... Inward flange, 194... Annular groove, 196... Spring piece.

Claims (1)

[Claims for Utility Model Registration] (1) An inward flange formed in a cylindrical shape and directed radially inward at the open end thereof, and a thickness of the inward flange extending in the axial direction from the end face of the open end. a rotating body that has an engagement notch formed with a depth of 1.5 mm or more and is rotated around its own center line; and a tool holding part that holds a cutting tool at one end.
Further, each of the other end portions is provided with a fitting portion that can be fitted inside the rotating body, and on the outer peripheral surface of the fitting portion,
After passing through the engagement notch when the fitting part is fitted to the rotating body, a radial protrusion that engages with the inward flange is formed by rotation at a predetermined angle, and the radial protrusion a tool holder having a contact surface that contacts an end surface of the open end of the rotary body at a position closer to the tool holder, and a portion of the tool holder that is closer to the tool holder than the contact surface; It is fitted so as to be movable outward in the axial direction and non-rotatable, and is urged toward the fitting portion by a spring member, and can be fitted into the engagement notch from the end face on the fitting portion side. a collar having an axial protrusion having a width of about 100 mm, and a collar having an axial protrusion extending radially outward between the tool holding portion of the tool holder and the radial protrusion; A flange portion is provided, the end face of the radial protrusion side of the flange portion is used as the abutment surface, and an engagement groove extending in the axial direction is provided in the flange portion, and the axial protrusion of the collar is aligned with the engagement groove. A tool mounting device characterized in that relative rotation between a collar and a tool holder is prevented by engaging the collar with the tool holder. (2) The radial protrusion of the tool holder is defined from the radially outward flange by each of two planes that are parallel to the axis of the tool holder and intersect with each other and the outer peripheral surface of the flange. 2. The tool holding device according to claim 1, wherein the tool holding device is a portion that remains within the corner formed by the two planes after two portions of the arcuate shape are removed. (3) The tool mounting device according to claim 1, wherein the rotating body includes a main body and an auxiliary member that is removably fixed to the main body and includes the inward flange and the engagement notch. .