JPH0448901Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for converting the number of rotating shafts suitable for a multi-shaft nut runner or the like.

[Conventional technology]

When tightening bolts, nuts, etc. using a multi-axis nut runner, when processed products such as bolts/nuts that need to be tightened with different numbers flow together in the production line,
Or, there are two tightening points with different numbers of tightening bolts on the same processed product.
If there are some locations, generally a nut runner is installed to match each processed product or the tightening location.
Previously, processed products were transported to the nut runner for tightening, but this not only increases costs but also risks reducing production efficiency.

Therefore, for example, as in the nut runner shown in Japanese Utility Model Application Publication No. 59-136235, six nut runner members are arranged side by side on a base so as to form each vertex of a regular hexagon with one point as the center. Among the nut runner members, four nut runner members, excluding the nut runner members located at a pair of point-symmetrical positions, are placed at positions corresponding to the vertices of a regular hexagon, and form each of the vertices of a square that is concentric with the regular hexagon and has a different pitch. The four nut runner members are supported so as to be movable relative to the base between positions corresponding to the vertices of a regular hexagon and positions corresponding to the vertices of a square, respectively. 4
a ring-shaped guide member that is rotatable back and forth in a direction perpendicular to the nut runner axis; a rotating means for reciprocating the guide member within a predetermined angle range;
There is a structure in which the engagement part of the support member is guided in movement by the guide part by the rotation of the guide member, the support member is rotated, and the four nut runner members are shifted.

However, in the nut runner disclosed in the above-mentioned Japanese Utility Model Publication No. 59-136235, a guide portion formed near the outer periphery of a ring-shaped guide member is provided with an engagement portion provided at one end of the support member that supports the nut runner member at one end. Since the nut runner parts (rollers) are engaged, the nut runner member is supported in a cantilevered manner by the individual support members, and the nut runner member is strong enough to withstand the reaction force generated when tightening by the nut runner member after changing the number of axes. The problem is that it is weak and lacks reliability as a device.

The present invention solves the above problems, increases the strength against the reaction force generated on the rotating shaft including the nut runner member, and secures position reliability by accurately maintaining the position of the rotating shaft. The purpose is to provide what is possible.

[Means for solving problems]

The present invention for achieving the above object will be explained with reference to FIGS. 1 to 6 corresponding to the embodiment.
2, 3... are supported, and the basic pieces 11, 12, 13... corresponding to the basic number N of rotating axes and the addition pieces 16, 17... corresponding to the number n of axes to be added thereto are placed sideways to each other at predetermined positions. Closely link 21,2
Connected by 2, 23..., the above basic frame 1
1, 12... have a first side surface 31 with a central angle of 360°/N near the tip, and a central angle continuous with the first side surface 31.
A second side surface 32 of 360°/(N+n) is formed, and the second side surface 32 is formed on the addition pieces 16, 17...
A side surface 33 with a central angle of 360°/(N+n) is formed at a position corresponding to 2, and the number of rotating axes can be converted to N and N+n by moving the addition pieces 16, 17, . . . forward and backward.

[Effect]

The state shown in Figure 1 is such that the axes of the rotating shafts 1 to 4 are at the vertices A, B, C, and D of the square, that is, 4
It shows the shaft configuration. At this time, the addition piece 16 is pulled to the leftmost end in FIG. The slide base 52 is brought into contact with a stopper 63. Therefore, the links 21 to 25 are closed, and the first side surfaces 31 of the basic pieces 11 to 14 are in close contact with each other to maintain the axes of the rotating shafts 1 to 4 at the positions A, B, C, and D.

Here, the rod 4 is moved by the air cylinder 43.
1. When the addition piece 16 is moved to the right via the connector 42, the links 21 to 25 are moved as shown in FIG. The slide base 52 moves while opening until it comes into contact with the stopper 64, and the air cylinder moves further to the right, and the addition piece 16 enters between the basic pieces 11 and 14 like a wedge while compressing the spring 46. , until the stopper 62 of the addition piece 16 comes into contact with the stopper 67 of the slide base 52, the side surface 33 of the addition piece 16 comes into contact with one of the second side surfaces 32 of the basic pieces 11 and 14, and the basic pieces 11-
14 second side surfaces 32 are in close contact with each other.

As a result, as shown in FIG.
5-axis configuration.

Now, when the addition piece 16 is pulled to the left again by the air cylinder 43, the slide base 52 is pulled until it comes into contact with the stopper 63 by the stopper 61 of the addition piece 16, as described above, and the auxiliary base 5
1. Links 21 to 2 via the slide base 52
5 is closed, the first side faces 31 of the basic pieces 11 to 14 come into close contact with each other, and the axes of the rotating shafts 1 to 4 are maintained at the positions A, B, C, and D in Figure 1, resulting in a 4-axis configuration. becomes.

〔Example〕

Figures 1 to 5 show embodiments in which the rotational axes can take configurations of four axes and five axes, and 1, 2, 3, etc. are rotary axes that can be used for nut runners, drills, etc. However, as the upper part is shown in Figure 3,
Basic pieces 11, 12, 13... and additional pieces 16
Support holes 11a, 1 made in the auxiliary base 51 of...
2a, 51a... and links 21 to 25 below,
Support cylinder 71 supported through the slide base 52
(partly shown in FIG. 3), and drive mechanisms 81 to 85 attached to the basic pieces 11 to 14 and the addition piece 16 are connected to the upper end.

11, 12... are basic pieces, and the side surface near the tip is the angle obtained by dividing the center angle by 360° by the number of basic axes of rotation axes 1, 2..., that is, the number N of rotation axes supported by the basic piece. At the same time, the addition pieces 16,
The second side surface 32 is formed at an angle equal to 360° divided by N+n, where n is the number of rotational axes supported by the second side surface 32.

16, . . . are addition pieces, and a semicircular shape is formed on the tip side surface in order to form a side surface 33 having the same angle as the second side surface 32 at a position corresponding to the second side surface 32 of the basic pieces 11, . The adjusting piece 161, ... is connected to the shaft 16
2. When supported by..., there is a sliding hole 16 in the center.
A is formed, stoppers 61 and 62 are provided at both ends thereof, and an escape hole 16b for the rotating shaft 5 is provided near the tip. In addition, a spring receiving piece 44 is attached to the rear end of the addition piece 16, . . . , a rod 41, a connector 4
It is connected to an air cylinder 43 via 2.

The sliding hole 16a of the addition piece 16 is connected to the substrate 91.
Top protrusion 52 of slide base 52 that slides on top
a and is configured to slide on the slide base 52. The length of the protrusion 52a is shorter than the sliding hole 16a, and the dimensional relationship is determined so that the conversion of the number of rotating shafts, which will be described later, can be performed smoothly and accurately. In addition, the protrusion 52a
The height is approximately 1/2 of the depth of the sliding hole 16a.

As shown in FIGS. 3 and 4, the slide base 52 is also formed with a protrusion 52b on the lower surface, and the protrusion 52b is inserted into the slide hole 91a formed in the substrate 91 with a bolt through the lower plate 53. installed,
It is slidably inserted. Similarly to the above, the dimensional relationship between the protrusion 52b and the sliding hole 91a is determined so that the conversion of the number of rotating shafts described later can be performed smoothly and accurately. In the figure, 63 and 64 are stoppers provided at both ends of the sliding hole 91a.

Reference numeral 51 designates an auxiliary base for the addition pieces 16, . There is. Note that the protrusion 51b is attached to the slide base 5.
The length is made equal to that of the upper surface protrusion 52a of No. 2.

Reference numeral 46 denotes a spring, and its both ends are inserted into a hole 44a drilled in a spring receiver piece 44 fixed to the addition piece 16, and a hole 52d of a spring receiver 52c provided on both sides of the slide base 52 corresponding to the hole 44a. The auxiliary base 51 and the slide base 52 are always urged rightward in FIGS. 1 and 2.

21 to 25 are links, and the links 21 to 24 are shaped like glasses, and have rotating shafts 5 and 1, 1 and 2, respectively.
It connects and supports 3 and 4 and 4 and 5. Further, the link 23 has a base shape, and the protrusion 23a formed on the lower surface is connected to the sliding hole 91 of the substrate 91.
It is fitted into a sliding hole 91b drilled on the same line as a,
Further, one ends of the links 22 and 24 both support the rotating shafts 2 and 3. In addition, in the figure, 65, 66
91c to 91f are stoppers formed at both ends of the sliding hole 91b, and 91c to 91f are relief holes oriented so that the rotation axes 1 to 4 pass through and do not interfere with mutual conversion between the 4th and 5th axes. It is.

The present rotating shaft number converting device 10 having the above configuration has a fifth
For example, it is attached to the top of the tightening body K shown in the figure.
In FIG. 5, W is a workpiece and J is a machining jig, which are mounted on a table T placed on an index I and moved up and down by a cylinder C. Further, 92 is a workpiece holder.

From the state of the 4-axis configuration shown in Figure 1, the air cylinder 4
3 and the addition piece 16 is added via the connector 42.
When moved to the right, the slide base 52 is pushed to the right via the spring 46 and moves until the protrusion 52b abuts the stopper 64. At this time, the links 21 to 21 are moved via the auxiliary base 51 and the slide base 52
25 performs an opening operation as shown in FIG. The rotating shafts 2 and 3 move from A to A' and from D to N', and the rotating shafts 2 and 3 move the link 23 until its protrusion 23a abuts the stopper 66, and then move from B to A in the escape holes 91d and 91e. The rotary shaft 5 moves from B' and C to C', and further moves from E to E' within the sliding hole 91a of the substrate 91.

The protrusion 52b of the slide base 52 is the stopper 6.
4, the adjustment piece 161 forming the side surface 33 of the addition piece 16 comes into contact with one of the second side surfaces 32 of the basic pieces 11 and 14. Also basic frame 11
- 14 are brought into close contact with each other, and as a result, as shown in FIG. ’,
It has a 5-axis configuration.

Here, the air cylinder 43 adds 16 frames.
When pulled to the left in FIG. 2, the slide base 52 is pulled to the left by the stopper 61 of the addition piece 16,
The protrusion 52b moves until it comes into contact with the stopper 63, and at this time, the links 21 to 25 are closed via the auxiliary base 51 and the slide base 52, and the second side surfaces 32 of the basic pieces 11 to 14 are separated and the first side surface 31
When the rotation shafts 1 and 4 come into close contact with each other, the rotation shafts 1 and 4 move from A' to A and from D' to N within the escape holes 91c and 91f, and the rotation shafts 2 and 3 move the link 23 with its protrusion. While returning until it contacts the stopper 65, the rotary shaft 5 moves from B' to B and from C' to C within the relief holes 91d and 91e, and further, the rotating shaft 5 moves through the sliding hole 16a of the adding piece 16 and the sliding hole 91a of the base plate 91.
move from Ho' to Ho respectively within.

The protrusion 52b of the slide base 52 is the stopper 6.
Each first of basic pieces 11 to 14 at the position where it touches 3
The side surfaces 31 are in close contact with each other, and as a result, as shown in FIG.
It maintains B, C, and D, resulting in a 4-axis configuration.

What is shown in Fig. 6 is an application example of the rotating axes number conversion device of the present invention, and the numbers are the same as those in Figs. 1 to 5 unless otherwise explained.
The axes, b in the same figure are the 5th and 6th axes, c in the same figure are the 4th and 6th axes,
Figure d shows a configuration capable of converting between 5 axes and 7 axes.
Note that 51' in the figure is an addition piece having two axes.

[Effect of idea]

As described above, in the rotational axes number conversion device according to the present invention, each rotational axis is supported, and the basic piece corresponding to the basic number N of rotational axes and the addition piece corresponding to the number n of axes to be added thereto are placed at predetermined positions. The basic piece has a first side surface with a central angle of 360°/N near the tip, and a second side surface with a central angle of 360°/(N+n) continuous to the first side surface. A side surface is formed on the addition piece, and a side surface with a center angle of 360°/(N+n) is formed at a position corresponding to the second side surface on the addition piece, and the number of rotating axes is changed to N and N+n by advancing and retreating the addition piece.
Because it is configured so that it can be converted into
For example, if processed products with different numbers of bolts to be tightened, such as nuts, are mixed together in a production line, or if the same processed product has two tightening points with different numbers of bolts to be tightened, the Or, there is no need to install a nut runner at the tightening location. Therefore,
Not only can costs be reduced, but production efficiency can be improved.

Further, according to the present invention, with the above configuration, the basic pieces have their first sides brought into close contact with each other at the desired number of rotating axes (the number of basic axes N or the number of basic axes N + the number of addition axes n), or the basic pieces and the addition pieces Since the second sides can be brought into close contact with each other to form an N-axis configuration or an (N+n)-axis configuration, it is strong against the reaction force generated when tightening the nut runner member, for example, and the reliability of the device is significantly increased. There are various effects such as being able to increase

[Brief explanation of drawings]

Figures 1 and 2 are plan views of main parts of the device for converting the number of rotating axes of the present invention, showing the case where the number of rotating axes is small;
The figure shows a case where there are many rotating axes. Third
The figures are a vertical sectional view taken along the line A-A in FIG. 1, FIG. 4 is an exploded perspective view of the main components, and FIG. Figure c is a plan view. Further, FIG. 6 is a schematic diagram showing an example of application of the device of the present invention. 1, 2, 3...Rotating axis, 10... Rotating axis number converter of the present invention, 11, 12, 13... Basic piece, 1
6...addition piece, 161...adjustment piece, 21,2
2, 23, 24, 25...link, 31...first
Side surface, 32...Second side surface, 33...Side surface, 41...
... Rod, 42 ... Connector, 43 ... Air cylinder, 44 ... Spring receiver piece, 51 ... Auxiliary base,
52...Slide base, 61, 62, 63, 6
4, 65, 66... Stopper, 71... Support cylinder, 81, 82, 83, 84, 85... Drive mechanism, 91... Substrate.

Claims (1)

[Scope of utility model registration request] Each of the rotating shafts is supported, and a basic piece corresponding to the basic number N of rotational axes and an addition piece corresponding to the number n of axes to be added thereto are connected by links at predetermined positions with their sides in close contact with each other. A first side surface with a center angle of 360°/N is formed near the tip, and a second side surface with a center angle of 360°/(N+n) is formed continuously to the first side surface, and the addition piece has a second side surface with a center angle of 360°/(N+n). Form a side surface with a central angle of 360°/(N+n) at the corresponding position, and change the number of rotating axes to N and N+n by advancing and retreating the addition piece.
A device for converting the number of rotational axes, characterized in that it is configured to be able to convert the number of rotational axes.