JPH0236662Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a magnetic chuck device suitable for use in holding a relatively large workpiece at a plurality of fixing points.

(Prior Art) Magnetic chuck devices are known that can fix a workpiece (magnetic material) by magnetic adsorption force when the workpiece is processed by a machine tool or the like.

The principle of such a magnetic chuck device (hereinafter abbreviated as M chuck) will be explained with reference to FIGS. A movable magnet section 3 is provided which switches the attracting surface S to be energized or demagnetized by doing so.
In addition, the parts labeled S and N indicate the magnetic poles, 4 indicates the magnetic material portion, and 5 indicates the non-magnetic material portion, respectively. Therefore, when the movable magnet portion 3 is switched to the position shown in FIG. 3, lines of magnetic force are generated only inside as indicated by the arrow H1, and the attracting surface S is in a demagnetized state and there is no attracting force. On the other hand, when the movable magnet section 3 is switched to the position shown in FIG.
The attraction surface S generated through the magnetic circuit including the workpiece W is in an excited state, that is, the workpiece W can be attracted and fixed.

By the way, the conventional M chuck uses, as a means for rotating the movable magnet part 3, a means operated by hand such as a knob or a lever attached directly to the rotating shaft of the magnet part 3 or via a gear, etc. By operating this knob, lever, etc., the magnetization or demagnetization of the attraction surface was switched.

(Problems to be Solved by the Invention) However, the conventional M chuck causes the following problems, especially when holding a large workpiece.

Generally, for large workpieces, an M chuck with a relatively large suction area is used to match the size of the workpiece. Excitation or demagnetization is switched by horizontally displacing the magnet (for example, Japanese Patent Publication No. 36-9697).

However, if the supported surface of a large workpiece is uneven or has steps, M
Since a chuck cannot be used, a plurality of M chucks as shown in FIG. 3 are usually used to hold the device. In this case, individual M chucks are arranged at a plurality of fixing points and installed in combination with a parallel stand in areas such as unevenness or steps.

By the way, since the M chuck shown in Fig. 3 uses a permanent magnet as a magnetic source, there is no need for a power supply at all, and this has the advantage of not requiring complicated wiring. must be switched mechanically.

Therefore, when a plurality of M chucks are used, the operation becomes complicated and work efficiency is significantly disadvantageous. Moreover, depending on the workpiece, M
There may also be cases where the chuck is hidden, making it virtually impossible to operate the M chuck.

(Means for Solving the Problems) The present invention solves the above-mentioned conventional problems, and is achieved by the following M chuck.

That is, as shown in FIG. 1, the M chuck 1 according to the present invention includes a fixed magnetic pole part 2 having an attraction surface S,
In a device equipped with a movable magnet section 3 that switches to excite or demagnetize the attracting surface S by being displaced, both ends of the rotating shaft 6 that displaces the movable magnet section 3 are exposed to the outside of the device, and The rotary shaft end portions 7 and 8 are each formed so as to be able to engage with and transmit rotation to the other rotation transmitting shaft.

(effect) Next, the operation of the present invention will be explained.

As shown in FIG. 5, the M chuck 1 according to the present invention connects each of the rotating shaft ends 7 and 8 to another rotation transmission shaft (hereinafter sometimes referred to as another shaft), for example, a handle shaft having a grip 10. 11, and transmission shaft 12
can be engaged with. This transmission shaft 12 can be similarly engaged with the rotary shaft end 7a of the other M chucks 1a, and each M chuck 1, 1
The rotating shafts of a are integrally connected to enable rotation transmission.
As a result, the M chucks 1 and 1a can be switched and controlled at once by only rotating the handle shaft 11, which is one end, for example. This can be done in the same way even if the number of M chucks increases.

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

[First Example] First, with reference to FIGS. 1 to 6, the first embodiment of the present invention will be described.
An example will be explained. FIG. 1 is a longitudinal cross-sectional side view of the M chuck according to the first embodiment (FIG. 2-line);
Figure 2 is a front view of the M chuck with the gear cover removed, Figures 3 and 4 are diagrams explaining the principle of the M chuck, and Figures 5 and 6 are diagrams explaining the use of the M chuck. be.

First, the structure of the M chuck indicated by reference numeral 1 will be explained.

A magnetic plate 21 is provided in the center, non-magnetic plates 22 and 23 are stacked on both left and right end surfaces of the magnetic plate 21, and magnetic plates 24 and 25 are stacked on the outer end surfaces of the non-magnetic plates 22 and 23, respectively. This constitutes an integrated block A. This block A
The upper surface becomes the suction surface S. On the other hand, this block A
At the bottom of the non-magnetic plates 22 and 23, at the same position on the left and right,
In addition, inner cavities are formed spanning the magnetic plates 24 and 21 and the magnetic plates 21 and 25, respectively, and fixed magnets 26 and 27 having a rectangular cross section are fitted into the inner cavities. The fixed magnetic pole portion 2 is thus configured.

Additionally, a hole was drilled slightly above the block A, spanning the magnetic plates 24 and 21 and the magnetic plates 21 and 25, respectively, and penetrating the non-magnetic plates 22 and 23 along their axes parallel to each other. Cylindrical magnets 28 and 29 are rotatably inserted into the inner cavity, and these magnets 28 and 29 constitute the movable magnet section 3.

On the other hand, driven shafts 32 and 33 are connected to one ends of the cylindrical magnets 28 and 29 via joints 30 and 31, and driven gears 34 and 3 are connected to the driven shafts 32 and 33, respectively.
5 is fixed on the shaft. Further, a penetrating bearing hole 36 is bored in the center of the lower part of the magnetic plate 21, and an operating shaft 37 is rotatably inserted through the bearing hole 36. Both ends of the operating shaft 37 extend outward and project a predetermined length forward and backward. The protruding and externally exposed ends 38 and 39 of the operating shaft 37 are each formed into a hexagonal head so that other shafts can engage with each other to transmit rotation.

Also, on the operating shaft 37, the driven gear 3
A drive gear 40 is shaft-locked at positions corresponding to 4 and 35. Furthermore, the drive gear 40 and each driven gear 34, 3
Intermediate gears 41 and 42 are interposed between the two intermediate gears 5 and 5, and the rotation of the driving gear 40 is transmitted to the driven gears 34 and 35 via the respective intermediate gears 41 and 42, and further to the cylindrical magnet 2.
8, 29.

A rack 43 is engaged with the lower part of the drive gear 40, and the moving stroke of the rack 43 is regulated so that the cylindrical magnets 28 and 29 rotate over a certain angular range (180 degrees).

Also, in the figure, 44 is a gear cover, 45 is a terminal board,
Reference numerals 46 and 47 indicate retaining rings, and 48 indicates a base.

By rotating the cylindrical magnets 28 and 29, the M chuck 1 constructed in this way can be assembled into two parts, as shown in FIGS. 3 and 4.
29 magnetic poles can be displaced, and the attracting surface S is energized or demagnetized according to the principle explained in the "Prior Art" section above.

Note that the cylindrical magnets 28 and 29 are rotated by rotating the operating shaft 37.

Next, the method of using the M chuck 1 will be explained with reference to FIGS. 5 and 6.

The M chuck 1 according to the present invention is relatively large and is suitable for holding workpieces W1 and W2 having stepped surfaces 61 and uneven surfaces 62 on the holding surfaces with a plurality of M chucks 1 and 1a.

FIG. 5 shows a case in which a workpiece W1 having a stepped surface 61 is held, and when an M chuck is installed on a flat mounting surface plate 65, one M chuck 1 is held.
is installed on a parallel stand 66 for alignment.

Further, the handle shaft 11 has an engaging recess 71 provided at the front end thereof to be removably fitted into the end 38, and an engaging recess 7 at both ends which is removably fitted to the end 39.
3,74, and universal joint 7
Transmission shafts 12 connected by 5 and 76 are respectively prepared.
Note that the handle shaft 11 is provided with a grip 10. Then, the engagement recess 71 of the handle shaft 11 and the M
End 38 of chuck 1, engagement recess 73 of transmission shaft, end 39 of M chuck 1, engagement recess 74 of transmission shaft
By engaging the end portions 7a of the M chucks 1 and 1a, the switching control of the M chucks 1 and 1a can be performed simultaneously by simply operating the grip 10.

In this case, the level difference surface 61 can be accommodated by the function of the universal joint. In addition, if necessary,
The same transmission shaft as the transmission shaft 12 may be engaged with the end 8a of the M chuck 1a to control a third M chuck, or the same system as the M chucks 1 and 1a may be used in the front and back directions of the page. It may be placed in

Therefore, when the M chuck 1a is alone and the mounting surface plate 1 is installed on a wall pole, conventionally it was impossible to operate or required an elbow-like difficulty, but the present invention makes it extremely easy to operate.

Further, FIG. 6 shows a workpiece W having an uneven surface 62.
This is a case where 2 is held. In this case, concave surfaces of the same height are held by chucks 1 and 1a. Therefore, unlike the case shown in FIG. 5, there are engaging recesses 8 at both ends.
Transmission shaft 8 made of a single rod-shaped body having a diameter of 0.81
2 can be used.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a front view of the M chuck according to the second embodiment, and FIG. 8 is a longitudinal side view (cross-section taken along the line in FIG. 7) of the M chuck.

The difference between the first embodiment and the second embodiment is that in the first embodiment, the operating shaft 37 for displacing the cylindrical magnets 28, 29 does not coincide with the rotation center axis of the cylindrical magnets 28, 29, and the rotation is transmitted through gears. However, the second embodiment differs in that the center of rotation of the cylindrical magnet 90 is made to coincide with the center of rotation of the operating shafts 91 and 92 exposed to the outside. The second embodiment corresponds to a type in which the M chuck of the first embodiment is divided into two parts and the fixed magnets 26 and 27 are omitted.
Therefore, in FIGS. 7 and 8, parts having the same functions as those in FIGS. 1 and 2 are given the same reference numerals to clarify the structure, and
Detailed explanation will be omitted.

Although the embodiments have been described in detail above, the present invention is not limited to these embodiments.

For example, any number of rotating shafts 6 may be provided on the side surface of the M chuck 1 via gears or the like. Further, although the ends 7 and 8 of the rotating shaft 6 are shown as hexagonal heads, they may have any shape, such as a square head, or may be concave. In this case, if it is formed into a concave shape, it can be connected with a simple hexagonal bar, and the handle shaft can be changed to a hexagonal bar wrench. Further, although the present invention is applied to a magnetic chuck device, it can be similarly applied to other devices having the same effect, such as a magnetic holder device.

(Effects of the invention) As described above, the M chuck (magnetic chuck device) according to the present invention has a fixed magnetic pole portion having an attraction surface, and a movable magnet portion that switches the attraction surface to be energized or demagnetized by displacement. The rotary shaft for displacing the movable magnet portion is exposed to the outside, and the exposed end of the rotary shaft is formed so as to be able to engage and transmit rotation to another shaft, as follows. achieve great effect.

Even when holding relatively large workpieces at multiple fixing points,
Since each M chuck can be connected and operated all at once, operation is extremely easy. In addition, it can be easily operated in locations where individual operations were previously impossible, such as when installed in hard-to-reach locations.For example, in automatic machine tools such as FMS, pallets that fix workpieces Even in the case of a type in which the direction is changed, it is possible to easily accommodate movement of the operating part.

The M-chuck can be used as a single item in the same manner as before, and can be operated from either side where both ends of the rotating shaft are exposed, so the usability and versatility of the M-chuck can be greatly improved.

It is simple in structure, does not increase parts cost, and can be provided at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment according to the present invention, and FIG. 1 is a vertical side view of the M chuck according to the first embodiment (cross section taken along the line in FIG. 2), and FIG. 2 shows the M chuck with the gear cover removed. front view, Figures 3 and 4
The figure is an explanatory diagram of the principle of the same M chuck, Figures 5 and 6.
7 is a front view of the M chuck according to the second embodiment, and FIG. 8 is a longitudinal side view of the M chuck (cross-sectional view taken along the line - line in FIG. 7). In the drawings, 1...M chuck (magnetic chuck device), 2...fixed magnetic pole part, 3...movable magnet part, 6...rotating shaft, 7, 8...rotating shaft end, S...adsorption surface.

Claims (1)

[Scope of utility model registration request] In a magnetic chuck device comprising a fixed magnetic pole part having an attraction surface, and a movable magnet part that is switched to excite or demagnetize the attraction surface by being displaced, both ends of a rotating shaft that displace the movable magnet part. What is claimed is: 1. A magnetic chuck device characterized in that a magnetic chuck device is formed so that each of the exposed rotating shaft ends can be engaged with another rotation transmitting shaft to transmit rotation.