JPH04343628A - Tool positioning device - Google Patents

Abstract

PURPOSE:To facilitate the automation of the assembling work and improve the work efficiency by automatically changing the size of a spanner hole coupled with a work in response to the size of the work. CONSTITUTION:A rotary actuator 4 is supported movably in the axial direction of its output shaft 5, and the first spanner body 13 formed with at least one spanner hole is provided at the tip section of a rotary block 11 fitted to the output shaft 5. The second spanner body 14 having at least two spanner holes with different sizes is connected to the first spanner body 13 movably in the direction perpendicular to the axial direction, the second spanner body 14 is moved against the first spanner body 13, thus the size of the spanner hole matched with the rotation center of the rotary actuator 4 is changed in response to the size of a work W1 and a work W2 on a rotary table 2.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is capable of automatically positioning a plurality of spanner means at a predetermined position according to the size used in an automatic assembly device, etc. that requires the attachment and detachment of a plurality of types of hexagonal nuts and bolts. This invention relates to a tool positioning device.

0002

[Prior Art] In conventional automatic assembly equipment, parts are integrated using hexagonal nuts, hexagonal bolts, etc., but when there are multiple types of these, the spanners must be manually replaced for each use. Alternatively, a method is used in which the necessary types of spanner drive means are prepared and the necessary spanner drive means is selected from among them according to the size to be used.

0003

However, this conventional method requires a considerable amount of time and means to replace the spanner or spanner drive means, resulting in poor working efficiency and high costs. In addition, the system using a spanner driving means has problems such as the device becomes large and expensive, and it is difficult to use easily.

An object of the present invention is to provide a tool positioning device that can automatically position two or more types of spanners according to the sizes used, facilitate automation of assembly work, etc., and improve work efficiency. It is in.

[0005]

[Means for Solving the Problems] A tool positioning device according to the present invention for achieving the above-mentioned object includes a rotating means movably supported in the axial direction of an output shaft, and an output shaft of the rotating means. a rotary block having a first spanner body mounted thereon and having at least one spanner hole formed in its tip; and a rotary block movably coupled to the first spanner body in a direction perpendicular to the axial direction, and having different sizes. The present invention is characterized by comprising a second spanner body having at least two spanner holes formed therein, and a drive means for moving the second spanner body.

[0006]

[Operation] The tool positioning device having the above-mentioned configuration moves the second spanner body with respect to the first spanner body of the rotation block attached to the output shaft of the rotation means, thereby moving the first spanner body and the second spanner body. Wrench holes of different sizes formed in the body are aligned with the axis of the rotating means, and the size of the spanner hole that engages with it is automatically changed depending on the size of the workpiece that lies on the axis of the rotating means. do.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail based on the illustrated embodiments. FIG. 1 shows an embodiment of a tool positioning device according to the present invention, and schematically shows a rotary table 2 installed on a base 1, a base 3 erected on the base 1, and a base 3. The rotary actuator 4 includes a rotary actuator 4 that is movable along the rotary actuator 4, and a spanner mechanism 6 that is integrally attached to an output shaft 5 of the rotary actuator 4. A fluid pressure cylinder 7 is installed parallel to the base column 3, and a sliding block 9 that can slide along the base column 3 is connected to the piston rod 8 of the fluid pressure cylinder 7. By supplying and discharging fluid, the rotary actuator 4 and spanner mechanism 6 attached to the sliding block 9 can be moved in the axial direction of the output shaft 5, that is, in the illustrated example, in the vertical direction.

The rotary actuator 4 operated by fluid pressure is mounted such that the axial direction of its output shaft 5 is parallel to the base column 3. Further, a cylindrical body 10 is fixed to the output shaft 5 of the rotary actuator 4, and this cylindrical body 10
A spanner mechanism 6 is configured at the tip. That is, a rotary block 11 having a built-in spanner mechanism 6 is formed at the tip of the cylinder 10, and the rotary block 11 is connected to a support block 12.
The support block 12 is rotatably connected to the sliding block 9, and the support block 12 is fixed to the sliding block 9.

FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a view taken from the direction B in FIG. portion constitutes a first spanner body 13, and this first spanner body 13
A second spanner body 14 is slidably coupled to the dovetail groove 15, for example, so that the second spanner body 14 can move along the dovetail groove 15 in a direction perpendicular to the axial direction of the output shaft 5. There is.

As shown in FIG. 3, the second spanner body 14 is formed with two types of hexagonal spanner holes of different sizes, that is, a large-size spanner bore 16 and a small-size spanner bore 17 adjacent to each other. In the illustrated example, the large size wrench hole 16 and the small size wrench hole 17 partially overlap and are continuous. On the other hand, on the first spanner body 13 side, a medium-sized spanner hole 18 and an escape hole 19 are formed on the back side thereof. The center position of this medium size wrench hole 18 coincides with the center of rotation of the rotary actuator 4, that is, the axis of the output shaft 5, and under normal conditions is also coaxial with the aforementioned large size wrench hole 16. However, when the second spanner body 14 is moved, the small size spanner holes 17 become concentric.

As a driving means for moving the second spanner body 14, in this embodiment, as shown in FIG. 3 and FIG.
1 is installed, with the tip of each piston rod facing the second spanner body 14, and the hydraulic cylinders 20, 2
1, the second spanner body 14
is made to slide along the dovetail groove 15 with respect to the first spanner body 13. Note that FIG. 4 shows the fluid pressure cylinder 21.
The figure shows a state in which the center of the small size wrench hole 17 is aligned with the center of rotation of the rotation actuator 4.

The moving distance of the second spanner body 14 is set equal to the distance between the centers of the large size spanner hole 16 and the small size spanner hole 17. However, as the driving means for the second spanner body 14, various means other than the fluid pressure cylinder can be used. In addition, in FIG. 1, 22
is a detection means for detecting the rotation angle of the rotation actuator 4;
23 is a drive mechanism for the rotary table 2, and 24 is a bearing.

The operation of the spanner mechanism 6 will be explained below. As shown in FIG. 3, normally the centers of the large size spanner hole 16 and the medium size spanner hole 18 are set concentrically and coincide with the rotation center of the rotation actuator 4. When the workpiece W1 shown in is of large size or medium size, the large size wrench hole 16 or the medium size wrench hole 18 is formed in the workpiece W1 by the vertical movement of the fluid pressure cylinder 7 and the rotational movement of the rotary actuator 4. When engaged, the tightening and loosening operations of the workpiece W1 can be performed as they are.

Next, when the rotary table 2 rotates and the small-sized workpiece W2 is positioned on the axis of the rotary actuator 4, one of the fluid pressure cylinders 21 is activated as shown in FIG. When the second spanner body 14 is moved, the small-sized spanner hole 17 is aligned with the axis of the rotary actuator 4. Therefore, in this case, the workpiece W2 and the small size wrench hole 17 are engaged with each other, and the workpiece W2 can be tightened or loosened. At this time, since the piston rod of the fluid pressure cylinder 21 has returned to its original position by the spring force, the rotation block 11 can perform a predetermined rotation operation by the rotation actuator 4.

[0015] In this way, in the embodiment, three types of wrench shapes, large, medium and small, can be automatically converted and used, making it possible to automate the assembly work and shorten the assembly time. .

In the above embodiment, the support block 12 is structured to move up and down together with the sliding block 9, but as another example, as shown in FIG. The rotary block 11 may be disposed within the frame body, and the second spanner body 14 may be moved by either of the hydraulic cylinders 20, 21 attached to the support block 12'. In this case, the diagonal distance of the rotating block 11 may be made smaller than the width inside the frame of the support block 12', so that the rotating block 11 can rotate inside the frame.

In addition to the embodiments described above, it is also possible to increase the number of types of spanners by making the spanner body structure two or more stages. Further, although the embodiment shows a case of a vertical type, it goes without saying that it may be installed horizontally. It goes without saying that the workpieces W1 and W2 attached to the rotary table 2 in FIG. 1 are not necessarily hexagonal nuts or hexagonal bolts, and may be various types of tools.

[0018]

[Effects of the Invention] As explained above, the tool positioning device according to the present invention is configured to be able to automatically convert a plurality of types of spanner shapes, so it becomes easy to automate assembly work etc. using a plurality of types of spanners. It is possible to increase work efficiency and significantly reduce costs. Furthermore, the structure is simple and manufacturing costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of a tool positioning device.

FIG. 2 is a sectional view taken along line AA in FIG. 1;

FIG. 3 is a bottom view of the wrench shape seen from direction B in FIG. 1;

FIG. 4 is a bottom view of the wrench with a different shape.

FIG. 5 is a perspective view of another example of the spanner mechanism.

[Explanation of symbols]

1 Base part 2 Rotary table 3 Base pillar part 4 Rotation actuator 5 Output shaft 6 Spanner mechanism 11 Rotating block 12 Support block 13 First spanner body 14 Second spanner body 16 Spanner hole for large size 17 Wrench hole for small size 18 Wrench hole for medium size

Claims (5)

[Claims] Claim 1: A rotating means supported movably in the axial direction of an output shaft, and a first spanner body attached to the output shaft of the rotating means and having at least one spanner hole formed in its tip. a rotating block; a second spanner body that is movably coupled to the first spanner body in a direction perpendicular to the axial direction and has at least two spanner holes of different sizes;
A tool positioning device comprising a drive means for moving the second spanner body. 2. The tool positioning device according to claim 1, wherein the second spanner body is coupled to the first spanner body by dovetail fitting. 3. The tool positioning device according to claim 1, wherein a medium-sized spanner hole is formed in the first spanner body, and a large-size spanner hole and a small-size spanner hole are formed in the second spanner body. 4. The tool positioning device according to claim 1, wherein a support block is disposed outside the rotating block, and the drive means is provided on the support block. 5. The tool positioning device according to claim 1, wherein said drive means is a spring return type hydraulic cylinder.