JPH0321846Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tool holding device that can be usefully used to hold various tools such as machine tools, particularly drills, taps, and the like.

[Conventional technology]

Conventionally, this type of tool holding device disclosed in, for example, Japanese Utility Model Publication No. 57-3703, etc., engages the shank end of the tool with a driver that is slidably mounted only in the axial direction within the holder. is configured to do so. However, only one width is used to engage the shank end of the tool, and if the diameter of the tool to be held is changed, even if the collet can be easily changed, the rotation stopper of the tool must be changed. However, it is not easy to use, and has the drawbacks of poor productivity and versatility.

[Purpose of invention]

The purpose of the present invention is to improve the above-mentioned drawbacks of the conventional example by providing multiple types of rotation stoppers for torque transmission that engage with the shank end of the tool, and selecting the tool engagement groove of the rotation stopper. By doing so, it is an object of the present invention to provide a highly productive and versatile tool holding device that can easily accommodate changes in tool size.

[Summary of the idea]

The gist of this invention to achieve the above objectives is as follows:
A sliding body having a through hole in a direction perpendicular to the axial direction and an axial hole communicating with the through hole is housed inside a holder main body having a tool holding portion at one end so as to be slidable in the axial direction, In order to fix the sliding body to the holder main body in the rotational direction,
A rotation stopper member is rotatably fitted into the through hole of the sliding body, and a plurality of tool engaging grooves whose groove width changes stepwise are formed on the outer periphery of the rotation stopper member, and the shank end of the tool is The sliding body is provided with a ball lock mechanism that engages with the tool engagement groove of the rotation stopper through a hole in the axial direction of the slide, and that prevents the rotation stop member from coming off and determines the rotation angle. This is a characteristic tool holding device.

[Example of idea]

The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows an embodiment in which the present invention is applied to a drill holder. A tool holder 2 for attaching a tool T is provided at one end of the holder body 1. In this embodiment, the tool holding portion 2 is a collect chuck, and 2a indicates a collet and 2b indicates a nut. Inside the holder body 1, a through hole 3 is provided in the axial direction, which is the longitudinal direction, and a female threaded portion 4 is formed inside the through hole 3 from the other end. Further, on the outside of the holder main body 1, there is a slot-shaped long hole 5 having a predetermined length in the axial direction and passing through the through hole 3 to the opposite side.
is provided. Further, a male thread 6 is formed on the outer periphery near the tool holding portion 2 side, and an adjustment nut 7 for setting the overall position is screwed into this.
A cylindrical sliding body 8 as shown in FIG. 2 is fitted into the through hole 3 so as to be slidable in the axial direction. The outer diameter of this sliding body 8 is set such that it can slide on the inside of the female threaded portion 4 without being restricted by the female threaded portion 4.
It is slightly smaller than the inner diameter of the female threaded portion 4. A through hole 9 is provided in the sliding body 8 in a direction perpendicular to the axial direction which is the sliding direction, and a hole 10 for inserting the shank end of the tool T that communicates with the through hole 9 from one end in the axial direction. is provided. Furthermore, a ball locking mechanism 14 consisting of a ball 11, a spring 12, and a screw 13 as shown in FIG. 3 is built into the other end of the sliding body 8.
faces into the through hole 9. Through hole 9
A rotation stopper 15 is fitted inside, and the rotation stopper 15 has a roughly cylindrical shape, and both ends protruding outward from the through hole 9 are fitted into the elongated hole 5, so that the rotation stop member 15 is aligned with the axis of the sliding body 8. It is designed to be able to slide in any direction. Further, on the outer periphery of the central portion of the rotation stopper member 15, there are tool engaging grooves 16a, 16b whose groove width changes stepwise at every predetermined angle of 90 degrees, for example.
16c, . . . are formed. These tool engaging grooves 16a, 16b, 16c, . . . are for engaging the shank ends of the tool T, and in the case of this embodiment, the width of the grooves is determined according to the rotation of the drill shank ends having different diameters. It is dimensioned to engage with each width of the two sides of the hexagonal pillar for stopping. Furthermore, the rotation stopper member 1
The ball 1 of the ball lock mechanism 14 is located on the outer periphery of the ball 5.
Index recesses 17a, 17b, 17 that engage 1
c, . . . are tool engaging grooves 16a, 16, respectively.
b, 16c, . . . are provided at predetermined angles. Note that a tool length adjustment screw 19 for adjusting the length of the tool is screwed onto the outside of the sliding body 8.

The ball lock mechanism 14 has a function of indexing the rotation stopper 15 at a predetermined angle, and also serves to prevent the rotation stopper 15 from coming off when no tool is being held. A driver groove 18 or a hexagonal hole for inserting an adjustment tool such as a driver or a spanner for twisting the rotation stopper 15 is provided on one end surface or both end surfaces of the rotation stop member 15 . Practically speaking, if a driver groove 18 is provided on one end surface and a hexagonal hole for a spanner is provided on the other end surface, adjustment can be made with either a screwdriver or a spanner, making it more convenient.

In the above embodiment, when the tool T is attached, the shank end of the tool T is attached to the rotation stopper member 1.
Torque is transmitted by engaging with any one of the tool engaging grooves 16a, 16b, 16c, . . . When replacing the tool with a different size tool, use the rotation stopper 1.
For example, insert a driver into the driver groove 18 provided on the end surface of the tool engagement groove 16a, 16b, 1 and twist the rotation stopper 15 to form the tool engagement groove 16a, 16b, 1 having a predetermined groove width.
It is only necessary to align one of 6c, . . . to the set position. FIG. 4 shows the case where the groove 16d is engaged with the end of the drill shank. This makes it possible to use several types of drills in which the two sides of the rotation-stopping hexagonal column at the end of the shank have different widths D, as shown in FIG.

The above embodiment is a case in which the present invention is applied to a drill holder, but in the case of a tap holder, the tool engagement grooves 16a, 16b, 16c, . Furthermore, the present invention can be similarly applied to other tool holding devices other than drills and taps.

[Effect of idea]

As explained above, the tool holding device according to the present invention allows adjustment when changing the size of the tool to be held to be completed in a short time by simply twisting the rotation stopper. It is possible to significantly improve productivity and versatility. Also,
Since the rotation angle of the rotation stopper can be easily and accurately determined by the ball lock mechanism, it is possible to easily and quickly engage the required tool engagement groove with the shank end of the tool when replacing the tool. can. Furthermore, when a tool is not held, the rotation stopper can be prevented from coming off by the ball lock mechanism, which not only ensures the safety of the device but also simplifies the structure and is advantageous in terms of cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the tool holding device according to the present invention, and FIG. 1 is a sectional view of a drill holder;
FIG. 2 is a partially exploded perspective view of parts, FIG. 3 is a side view of each member of the ball lock mechanism, and FIG. 4 is an explanatory diagram of the engagement relationship between the rotation stopper and the tool. Reference numeral 1 is the holder main body, 2 is the tool holding part, 3 is the through hole, 4 is the internal thread part, 5 is the elongated hole, 8 is the sliding body, 9
10 is a through hole, 11 is a ball, 12 is a spring, 13 is a screw, 14 is a ball lock mechanism, 15
are rotation stopping members, 16a, 16b, 16c, . . .
17a, 17b, 17c, . . . are indexing recesses, 18 is a driver groove, and 19 is a tool length adjustment screw.

Claims (1)

[Scope of utility model registration request] A sliding body having a through hole in a direction perpendicular to the axial direction and an axial hole communicating with the through hole is housed inside a holder main body having a tool holding portion at one end so as to be slidable in the axial direction, In order to fix the sliding body to the holder main body in the rotational direction,
A rotation stopper member is rotatably fitted into the through hole of the sliding body, and a plurality of tool engaging grooves whose groove width changes stepwise are formed on the outer periphery of the rotation stopper member, and the shank end of the tool is The sliding body is provided with a ball lock mechanism that engages with the tool engagement groove of the rotation stopper through a hole in the axial direction of the slide, and that prevents the rotation stop member from coming off and determines the rotation angle. Characteristic tool holding device.