JP6831559B2 - Clamp system - Google Patents

Description

The present invention relates to a clamp system for clamping a workpiece or the like to be machined by a magnetic fixing means, and relates to a clamp system capable of clamping an object to be clamped whose lower end is not flat.

Various magnetic fixing devices have been widely put into practical use, in which a plurality of sets of magnetic fixing units are incorporated into a steel board member to form a flat fixing surface for fixing a clamp object on the upper end surface of the board member. There is. For example, in the magnetic fixing device described in Patent Document 1, a plurality of magnetic fixing units are incorporated in the lower part of a rectangular steel block, and a plurality of magnetic fixing units are also incorporated in the upper part of the steel block. The type fixing device can be fixed to the upper surface of the base member by magnetic force, and the object to be clamped can be attracted to the fixing surface at the upper end of the magnetic type fixing device by magnetic force.

In the clamp system described in Patent Document 2, a plurality of block-shaped magnetic force fixing devices are provided, the lower surface of the clamp object is attracted to the plurality of magnetic force fixing devices, and the left and right side surfaces of the clamp object are a plurality of sides. It is regulated so that it will not move by receiving it with a magnetic fixing device.

Utility Model Registration No. 3165203 Utility Model Registration No. 3173058 Gazette

In the conventional magnetic fixing device, the lower end surface of the object to be clamped is clamped in a surface contact state with the flat horizontal fixing surface of the magnetic fixing device.
However, in some cases, the object to be clamped does not have a flat surface on the lower end side, and one or more of recesses, protrusions, steps, ribs, protrusions, inclined surfaces, and opening holes are formed. Not a few.

With the conventional magnetic force type fixing device, it is impossible to fix the clamp object whose surface to be attracted is not flat as described above. Therefore, the object to be clamped to which the magnetic fixing device can be applied is remarkably restricted, and there are many cases where the magnetic fixing device cannot be effectively used.

An object of the present invention is to provide a clamping system capable of fixing clamp target portions located at two or more height direction positions of a clamp target object and strengthening a clamping force as needed.

Clamp system of claim 1, a clamping system for fixing a clamp object using a switchable magnetic fixing means in the suction release state and the suction state, the upper end of the fixed surface located in a horizontal reference plane One or a plurality of magnetic force-type fixing means provided, and a plurality of columnar supports that are attracted and fixed to the fixing surface, and a plurality of columnar supports that fix the object to be clamped to the one or a plurality of magnetic force-type fixing means. The magnetic fixing means is a base-side fixing surface parallel to the fixing surface on the side opposite to the fixing surface, and the base member on which the magnetic fixing means is installed can be attracted to the base-side fixing. It is characterized by having a surface .

According to the above configuration, a plurality of columnar supports are attracted and fixed to the fixing surface of one or a plurality of magnetic force type fixing devices, and the clamp object is fixed to the one or a plurality of magnetic force type fixing devices by these columnar supports. be able to. Even when the positions of the plurality of clamp target parts of the clamp target in the height direction are not constant, the clamp target can be fixed by using a plurality of columnar supports having different height dimensions.
Then, since the magnetic force type fixing means can be fixed to the upper surface of the base member by a magnetic force, it is necessary to form a bolt hole or a T groove in the base member in order to fix the magnetic force type fixing means to the base member. There is no. In addition, the magnetic fixing means can be freely moved.

The clamp system of claim 2 is the invention of claim 1, wherein the plurality of columnar supports are a plurality of clamp target portions at the lower end of the clamp target object and are positioned at two or more height directions from the fixed surface. Each of the plurality of clamp target parts is set to be fixed, each columnar support has a support part for receiving the clamp target part, and the height dimension from the lower end of each columnar support to the support part corresponds to the corresponding portion. The feature is that the clamp target portion is set to a size that can support it.

According to the above configuration, a plurality of clamp target sites located at two or more height direction positions can be fixed by using a plurality of columnar supports corresponding to them.

The clamp system according to claim 3 is the invention of claim 2, wherein the columnar support has a base portion that can be attracted to the fixed surface, a rod portion that rises upward from the base portion, and a portion to be clamped to the rod portion. It is characterized by being provided with a connecting means for connecting the connection so as to be detachable.

According to the above configuration, since the columnar support has a simple configuration including a base portion, a rod portion, and a connecting means, it can be manufactured at low cost.

The clamp system of claim 4 is the invention of claim 3, wherein the connecting means is a screw shaft portion integrally formed at the upper end of the rod portion, and a screw screwed into a screw hole of the clamp target portion. It is characterized by consisting of a shaft.
According to the above configuration, since the connecting means is a screw shaft portion integrally formed at the upper end of the rod portion and is composed of a screw shaft portion screwed into a screw hole of the clamp target portion, the clamp target portion moves up and down. It can be fixed so that it does not move in the direction.

In the invention of claim 3, the clamping system according to claim 5 is a fixing screw shaft portion screwed into a screw hole of the rod portion and a screw integrally formed at the upper end of the fixing screw shaft portion. It is characterized by having a screw shaft portion which is a shaft portion and is screwed into a screw hole of the clamp target portion. According to the above configuration, since the connecting means is a separate member from the rod portion, only the connecting means can be replaced with connecting means having different sizes. In addition, the support portion at the upper end of the rod portion can be easily and accurately processed.

In the invention of claim 3, the clamp system of claim 6 has rod portions of the columnar support, a lower rod portion and an upper rod portion arranged concentrically and in series, a lower rod portion and an upper rod portion. It is characterized by having a screw mechanism for connecting the portions so as to be expandable and contractible in the axial direction.
According to the above configuration, the height dimension from the lower end of the columnar support to the support portion can be adjusted via the screw mechanism, so that the versatility of the columnar support can be enhanced.

In the invention of claim 3, the clamp system according to claim 7 is such that the connecting means is inserted into the bolt hole formed through the base portion and the rod portion and the bolt hole from the base portion side. It is characterized by having a bolt member having a screw shaft portion protruding outside the upper end of the rod portion. According to the above configuration, the columnar support can be easily connected to the clamp target portion by rotating the bolt member.

In the invention of claim 3, the clamp system of claim 8 is such that the connecting means is inserted into a bolt insertion hole formed in a clamp object from above and screwed into a screw hole formed in the rod portion. It is characterized by having a bolt member.
According to the above configuration, the columnar support can be easily connected to the clamp target portion by rotating the bolt member from the upper surface side of the clamp target object.

The clamp system of claim 9 is characterized in that, in the invention of claim 3, the connecting means comprises a permanent magnet or an electromagnet.
According to the above configuration, even when a screw hole or a bolt hole cannot be formed in the object to be clamped, the rod portion of the columnar support can be connected to the part to be clamped via the permanent magnet or the electromagnet. The versatility of the system and the versatility of the columnar support can be increased.

The clamp system according to claim 10 is characterized in that, in the invention of claim 6, the connecting means comprises an electromagnet including the upper rod portion and a coil wound around the outer peripheral side of the upper rod portion.
According to this configuration, a strong suction force can be generated on the small support portion, so that the clamp target portion can be strongly clamped even when the target portion is narrow.

The clamp system according to claim 11 is characterized in that, in the invention of any one of claims 1 to 9, a plurality of connecting supports are provided on the fixing surface of the one magnetic fixing means .
According to the above configuration, the number of magnetic fixing means can be minimized.

According to the invention of the present application, various effects as described above can be obtained.

It is a front view of the clamp system which concerns on Example 1 of this invention. It is a top view of the magnetic force type fixing device. It is sectional drawing of the magnetic force type fixing device (work suction state). It is a partial cross-sectional view of the magnetic force type fixing device (work suction release state). It is an exploded perspective view of the magnetic force type fixing unit. It is sectional drawing of the main part which shows the 1st modification example of a connecting means. It is sectional drawing of the main part which shows the 2nd modification example of the connecting means. It is sectional drawing of the main part which shows the 3rd modification example of the connecting means. It is sectional drawing of the main part which shows the 4th modification example of the connecting means. It is sectional drawing of the main part which shows the 1st modification example of a columnar support. It is sectional drawing of the main part which shows the 2nd modification example of a columnar support. It is a front view which shows the 3rd modification example of a columnar support. It is a front view which shows the 4th modification example of a columnar support. It is a front view of the clamp system which concerns on Example 2 of this invention.

Next, a mode for carrying out the present invention will be described based on examples.

Next, the clamp system of the present invention according to the first embodiment will be described with reference to the drawings.
The clamp system 1 is a clamp system for fixing an object to be clamped (hereinafter referred to as a workpiece W) by using a magnetic force type fixing means that can switch between a suction state and a suction release state. As shown in FIG. 1, the clamp system 1 includes a plurality of magnetic force type fixing devices 2 having a fixing surface 2a located in the reference horizontal plane H at the upper end, and a plurality of columnar supports attracted and fixed to the fixing surface 2a. The work piece W is provided with a plurality of columnar supports 3 for fixing the workpiece W to the plurality of magnetic force type fixing devices 2. The "magnetic force type fixing device" corresponds to the magnetic force type fixing means.

The plurality of columnar supports 3 are set so as to fix the plurality of clamp target portions 4 at the lower end of the workpiece W and the plurality of clamp target portions 4 located at two or more height direction positions from the fixing surface 2a. Each columnar support 3 has a support portion 3a that receives the clamp target portion 4 from below, and the height dimension from the lower end of each columnar support 3 to the support portion 3a can support the corresponding clamp target portion 4. The dimensions are set. That is, when the clamp target portion 4 is directly supported by the support portion 3a, the height dimension of each columnar support 3 is equal to the height dimension from the fixed surface 2a to the corresponding clamp target portion 4. Set.

Next, the magnetic fixing device 2 will be described with reference to FIGS. 2 to 5.
The magnetic fixing device 2 is formed of a rectangular parallelepiped main body member 10 made of steel, a horizontal fixing surface 2a formed at the upper end of the magnetic fixing device 2, and a lower end opposite to the fixing surface 2a. A horizontal base-side fixing surface 2b, four sets of magnetic fixing units 11A and 11B incorporated in the upper end side portion of the main body member 10, and four sets of magnetic force type fixing units incorporated in the lower end side portion of the main body member 10. It is equipped with 11A and 11B.

The four sets of magnetic fixing units 11A and 11B on the upper side are arranged in a two-row, two-column matrix in an approaching manner in a plan view. These four sets of magnetic fixing units 11A and 11B have the same structure. The lower four sets of magnetic fixing units 11A and 11B are arranged in a two-row, two-column matrix in an approaching manner in a plan view. These four sets of magnetic fixing units 11A and 11B have the same structure.

The magnetic fixing units 11A and 11B on the upper side will be described.
As shown in FIG. 5, the magnetic fixing units 11A and 11B include a steel square steel plate 12, eight permanent magnets 13 arranged on the outer peripheral side of the steel plate 12, and steel. A square thick plate-shaped alnico magnet 14 arranged in contact with the lower surface of the thick plate 12, a square frame-shaped coil 15 arranged on the outer peripheral side of the alnico magnet 14, and these steel thick plates 12 It is provided with a through bolt 16 or the like for fixing the alnico magnet 14 to the main body member 10.

As shown in FIG. 3, the permanent magnet 13 directs the direction of the magnetic field in the horizontal direction, and the permanent magnet 13 of the magnetic fixing unit 11A on the left side of FIG. 3 has an north pole on the steel plate 12 side. The permanent magnet 13 of the magnetic fixing unit 11B on the right side has an S pole on the steel plate 12 side. The permanent magnets 13 between the pair of magnetic fixing units 11A and 11B adjacent to the left and right are shared by the magnetic fixing units on both sides. Similarly, the permanent magnets 13 between the pair of magnetic fixing units 11A and 11B adjacent to each other in the front-rear direction are shared by the magnetic fixing units on both sides.

As shown in FIG. 3, the alnico magnet 14 directs the direction of the magnetic field in the vertical direction. The coil 15 is for switching the direction of the magnetic field of the alnico magnet 14, and by switching the direction of energization of the coil 15, an upward magnetic field is applied to the alnico magnet 14 and a downward magnetic field is applied. It is possible to switch to the state. By applying the magnetic field generated by the coil 15 to the alnico magnet 14 for several seconds, the polarity of the alnico magnet 14 is switched so that the direction of the magnetic field of the alnico magnet 14 is aligned with the direction of the magnetic field.

FIG. 3 is a cross-sectional view showing a state in which the upper four sets of magnetic fixing units 11A and 11B are in an attracted state in which an external object M can be attracted to the fixed surface 2a. The alnico magnet 14 of the magnetic fixing unit 11A on the left side has an N pole on the upper surface side, and the alnico magnet 14 of the magnetic fixing unit 11B on the right side has an S pole on the upper surface side. As shown in FIG. 3, steel Since a closed loop-shaped magnetic path is formed in the thick plate 12, the permanent magnet 13, the alnico magnet 14, and the external object M, it is in an attracted state.

The four sets of magnetic fixing units 11A and 11B on the lower side of the magnetic fixing device 2 have the same structure as the four sets of magnetic fixing units 11A and 11B on the upper side, and as shown in FIG. The lower four sets of magnetic fixing units 11A and 11B are also in an attracted state, the base member B on which the magnetic fixing device 2 is installed is attracted to the base side fixing surface 2b, and the magnetic fixing device 2 is the base member. It is fixed to B.

When the polarity of the alnico magnet 14 is switched via the coil 15, the upper four sets of magnetic fixing units 11A and 11B are switched to the adsorption release state as shown in FIG. In this adsorption release state, a closed loop-shaped magnetic path is formed inside the magnetic fixing device 2, so that the adsorption release state is achieved. The four sets of magnetic fixing units 11A and 11B on the lower side can also be switched to the suction release state in the same manner as described above. A cable connecting portion 17 for connecting a cable for energizing the eight sets of coils 15 is provided on one side surface of the magnetic fixing device 2.

Next, the columnar support 3 will be described.
As shown in FIG. 1, in the columnar support 3, the base portion 20 that can be attracted to the fixed surface 2a, the rod portion 21 that rises upward from the base portion 20, and the rod portion 21 are disconnected from the clamp target portion 4. It is provided with a connecting means 22 for connecting as possible. The columnar support 3 shown in FIG. 1 is an integral member made of steel.

As shown in FIG. 2, the base portion 20 is made of a circular thick plate having a diameter substantially equal to the width of four sets of magnetic fixing units 11A and 11B. However, the base portion 20 is not limited to a circular shape, and may be a rectangular shape, a square shape, or a polygonal shape. The thickness of the base portion 20 is not particularly limited, but a thickness capable of forming a magnetic path is required. The base portion 20 is strongly adsorbed and fixed to the fixing surface 2a. Therefore, the bottom surface of the base portion 20 is formed on a smooth surface.

The rod portion 21 is a solid member having a circular cross section with a diameter smaller than that of the base portion 20, is integrally formed with the base portion 20, and rises vertically from the central portion of the base portion 20. However, the diameter is not limited to that of the base portion 20, and may be the same diameter. Further, the cross section is not limited to a circular cross section, and a square cross section, a rectangular cross section, or other shapes may be used. In the normal columnar support 3 among the plurality of columnar supports 3, the height dimension of the rod portion 21 is larger than the width dimension, but the height dimension is not limited to this, and the height dimension includes the one smaller than the width dimension. ..

A horizontal support portion 3a for receiving the clamp target portion 4 of the workpiece W is formed on a flat surface at the upper end of the rod portion 21.
Since the positions of the plurality of clamp target parts 4 at the lower end of the workpiece W in the height direction from the fixed surface 2a are not constant and are in the plurality of height direction positions, they are suitable for supporting the plurality of clamp target parts 4 respectively. A plurality of columnar supports 3 having different dimensions are adopted. That is, the height dimension from the lower end of each columnar support 3 to the support portion 3a is the fixed surface of the clamp target portion 4 supported by the columnar support 3 (that is, the clamp target portion 4 corresponding to the columnar support 3). It is set equal to the height dimension from 2a.

In the case of the columnar support 3 shown in FIG. 1, the connecting means 22 is composed of a screw shaft portion 25 integrally formed at the upper end of the rod portion 21 and rising vertically.
The screw shaft portion 25 has a smaller diameter than the rod portion 21, and the length of the screw shaft portion 25 is, for example, 10 to 20 mm, but the length is not limited to this. Since the screw shaft portion 25 rises vertically from the central portion of the support portion 3a, the support portion 3a has an annular surface.

A flat surface is formed in the clamp target portion 4 of the workpiece W to be received by the support portion 3a of the rod portion 21, and a screw hole 26 into which the screw shaft portion 25 is screwed is formed in the clamp target portion 4. The screw shaft portion 25 is screwed into the screw hole 26, and the support portion 3a is brought into close contact with the clamp target portion 4.

In the clamp system 1 illustrated in FIG. 1, two magnetic fixing devices 2A and 2B are arranged on the upper surface of the base member B so as to be separated from each other on the left and right, and their fixing surfaces 2a are located in the reference horizontal plane H. A first clamp target portion 4a and a second clamp target portion 4b located at a position lower than the first clamp target portion 4a are formed at the lower end of the workpiece W.

The first columnar support 3A in which the screw shaft portion 25 is screwed into the first clamp target portion 4a is attracted and fixed to the fixing surface 2a of the magnetic fixing device 2A on the left side of FIG. 1, and the second clamp target portion. The second columnar support 3B into which the screw shaft portion 25 is screwed into 4b is attracted and fixed to the fixing surface 2a of the magnetic fixing device 2B on the right side of FIG. 1, and thus the first and second columnar supports 3A, Using 3B, the workpiece W is fixed by two magnetic fixing devices 2A and 2B. At this time, the upper end surface of the workpiece W is positioned in a horizontal state, for example.

In the example shown in FIG. 1, the workpiece W was clamped by using two magnetic fixing devices 2A and 2B and two columnar supports 3A and 3B, but with three or more magnetic fixing devices 2. It is also possible to clamp the workpiece W with three or more columnar supports 3.

As shown in Example 2 described later, one large magnetic force fixing device 2C incorporating a large number of magnetic force fixing units and a plurality of columnar supports 3 instead of the plurality of magnetic force fixing devices 2. May be configured to clamp the workpiece W with.

The operation and effect of the above-mentioned clamp system 1 will be described.
A plurality of columnar supports 3 are attracted and fixed to the fixing surfaces 2a of the one or a plurality of magnetic force type fixing devices 2, and the plurality of clamp target portions 4 of the workpiece W are received by the columnar supports 3 and one or a plurality of magnetic force types. It can be fixed to the fixing device 2. Even when the entire lower end surface of the work piece W is not a flat surface, the work piece W can be fixed by using a plurality of columnar supports 3 having different height dimensions.

A plurality of clamp target sites 4 located at two or more height direction positions can be fixed by using a plurality of columnar supports 3 corresponding thereto. Moreover, even when the clamp target portion 4 is small, a large clamping force can be obtained.
Since the columnar support 3 has a simple structure including a base portion 20, a rod portion 21, and a connecting means 22, it can be manufactured at low cost.

Since the connecting means 22 is a screw shaft portion 25 integrally formed at the upper end of the rod portion 21 and includes a screw shaft portion 25 screwed into the screw hole 26 of the clamp target portion 4, the clamp target portion 4 is in the vertical direction. Can be fixed so that it does not move to.

Next, a first modification example of the connecting means 22 will be described.
As shown in FIG. 6, the connecting means 22C of the columnar support 3C includes a fixing screw shaft portion 30 screwed into the screw hole 21a of the rod portion 21 and a screw integrally formed at the upper end of the fixing screw shaft portion 30. A screw member 32 having a shaft portion 31 is provided. The screw shaft portion 31 is formed to have a smaller diameter than the fixed screw shaft portion 30, and is screwed into the screw hole 26C of the clamp target portion 4. In this case, since the screw member 32 is a separate member from the rod portion 21, only the screw member 32 can be replaced with a screw member having a different size. Moreover, the support portion 3a can be easily and accurately processed.

Next, a second modification example of the connecting means 22 will be described.
As shown in FIG. 7, the connecting means 22D of the columnar support 3D includes a fixing screw shaft portion 33 screwed into the screw hole 21b of the rod portion 21 and a screw integrally formed at the upper end of the fixing screw shaft portion 33. A screw member 35 having a shaft portion 34 is provided. The screw shaft portion 34 is formed to have a larger diameter than the fixed screw shaft portion 33, and is screwed into the screw hole 26D of the clamp target portion 4. The fixing screw shaft portion 33 is fixed to the rod portion 21 by the set screw 36 so as to be defixable. In this case, since the screw member 35 is a separate member from the rod portion 21, only the screw member 35 can be replaced with a screw member having a different size. Further, since the fixing screw shaft portion 33 does not loosen, the replacement becomes easier.

Next, a third modification example of the connecting means 22 will be described.
As shown in FIG. 8, the connecting means 22E of the columnar support 3E has a bolt hole 37 formed through the base portion 20 and the rod portion 21 and is inserted into the bolt hole 37 from the base portion 20 side and the rod portion. It has a bolt member 38 having a screw shaft portion 38a protruding outside the upper end of 21 and having a screw shaft portion 38a screwed into the screw hole 26E of the clamp target portion 4. In this case, the columnar support 3E can be easily connected to the clamp target portion 4 by rotating the bolt member 38.

Next, a fourth modification example of the connecting means 22 will be described.
As shown in FIG. 9, the connecting means 22F of the columnar support 3F includes a bolt insertion hole Fa formed in the flange portion F of the workpiece W, a screw hole 21c formed in the rod portion 21, and a bolt insertion hole Fa. The positioning ring 40 mounted on the lower part of the rod portion 21, the fitting hole 21d formed in the upper end portion of the rod portion 21 so that the small diameter portion 40a on the lower portion of the positioning ring 40 fits, and the upper surface of the flange portion F are set. It has a washer 41a to be formed, and a bolt member 41 inserted from above the flange portion F, inserted through the washer 41a and the positioning ring 40, and screwed into the screw hole 21c. In this case, the columnar support 3F can be easily connected to the clamp target portion 4 by rotating the bolt member 41 from the upper surface side of the workpiece W. Moreover, since the positioning ring 40 is provided, the workpiece W can be positioned.

Next, a first modification example of the columnar support will be described.
As shown in FIG. 10, the rod portion of the columnar support 3G has a lower rod portion 42 and an upper rod portion 43 arranged concentrically and in series, and a lower rod portion 42 and an upper rod portion 43 in the axial direction. It has a screw mechanism 44 that is stretchably connected. The screw mechanism 44 has a screw hole 45 formed in the lower rod portion 42 and a screw shaft portion 46 formed so as to project downward into the upper rod portion 43 and screwed into the screw hole 45. Have. The lower rod portion 42 and the upper rod portion 43 are formed with spanner engaging portions 42a and 43a, respectively.

Although the same connecting means as the connecting means 22D shown in FIG. 7 is adopted as the connecting means, any of the connecting means 22 and 22C shown in FIGS. 1 and 6 may be adopted.
According to the above-mentioned columnar support 3G, the height dimension from the lower end of the columnar support 3G to the support portion 3a can be adjusted (set) to a height dimension that can support the clamp target portion 4 via the screw mechanism 44. , The versatility of the columnar support 3G can be enhanced.

Next, a second modification example of the columnar support will be described.
As shown in FIG. 11, the rod portion 21 of the columnar support 3H has a lower rod portion 47 and an upper rod portion 48 arranged concentrically and in series, and a lower rod portion 47 and an upper rod portion 48 in the axial direction. It has a screw mechanism 49 that connects to and expandably. The screw mechanism 49 has a screw hole 50 formed in the upper rod portion 48 and a screw shaft portion 51 formed so as to project upward into the lower rod portion 47 and screwed into the screw hole 50. Have. The lower rod portion 47 and the upper rod portion 48 are formed with spanner engaging portions 47a and 48a, respectively.

Although the same connecting means 22 as shown in FIG. 1 is adopted as the connecting means, any of the connecting means 22C and 22D shown in FIGS. 6 and 7 may be adopted.
According to the columnar support 3H, the height dimension from the lower end of the columnar support 3H to the support portion 3a can be adjusted (set) to a height dimension that can support the clamp target portion 4 via the screw mechanism 49. Therefore, the versatility of the columnar support 3H can be enhanced.

Next, a third modification example of the columnar support will be described.
As shown in FIG. 12, the steel columnar support 3I includes a base portion 20, a rod portion 21, and connecting means 22I. The rod portion 21 has a lower rod portion 52, an upper rod portion 53 arranged concentrically and in series with the lower rod portion 52, and the lower rod portion 52 and the upper rod portion 53 in the axial direction. It has a screw mechanism 54 that is stretchably connected. A flat support portion 53a is formed at the upper end of the upper rod portion 53.

The screw mechanism 54 has a screw hole 55 formed in the lower rod portion 52, and a screw shaft portion 56 formed so as to project downward into the upper rod portion 53 and screwed into the screw hole 55. However, the screw mechanism 49 as shown in FIG. 11 may be adopted as the screw mechanism 54.
The connecting means 22I is composed of a rectangular parallelepiped block-shaped permanent magnet 57 separate from the upper rod portion 53. It is desirable that the permanent magnet 57 is composed of a neodymium magnet or the like that generates a strong magnetic force.

The clamp target portion 4 of the workpiece W is a clamp target portion made of a flat surface.
The permanent magnet 57 is attracted and fixed to the clamp target portion 4, the support portion 53a of the columnar support 3I is attracted and fixed to the lower surface of the permanent magnet 57, and the clamp target portion 4 is vertically oriented by the columnar support 3I and the permanent magnet 57. Support immovable.

Instead of the permanent magnet 57 as the connecting means 22I, an electromagnet or a magnetic fixing unit as shown in FIG. 5 may be adopted.

According to the columnar support 3I described above, even when a screw hole or a bolt hole cannot be formed on the lower end side of the workpiece W, the rod portion 21 of the columnar support 3I can be connected to the clamp target portion 4. The versatility of the clamp system 1 and the versatility of the columnar support 3I can be enhanced.

Next, a fourth modification example of the columnar support will be described.
As shown in FIG. 13, the steel columnar support 3J includes a base portion 20, a rod portion 21, and connecting means 22J. The rod portion 21 has a lower rod portion 58, an upper rod portion 59 arranged concentrically and in series with the lower rod portion 58, and the lower rod portion 58 and the upper rod portion 59 in the axial direction. It has a screw mechanism 60 that is stretchably connected. A flat support portion 59a is formed at the upper end of the upper rod portion 59.

The screw mechanism 60 has a screw hole 60a formed in the lower rod portion 58 and a screw shaft portion 60b formed so as to project downward into the upper rod portion 59 and screwed into the screw hole 60a . A coil 61 is provided on the outer peripheral side of the upper rod portion 59 in a plurality of manners, and the upper rod portion 59 and the coil 61 constitute an electromagnet 62 capable of generating a strong attractive force. When the above-mentioned electromagnet 62 is adopted as the connecting means 22J, the diameter of the electromagnet 62 can be made small while ensuring the attractive force, so that the clamping target portion 4 can be attracted and fixed even on a narrow flat surface.
Instead of the electromagnet 62, a permanent magnet or a magnetic fixing unit as shown in FIG. 5 may be used.

The clamp system 1A has one magnetic fixing device 2C and a plurality of columnar supports 3 (3K, 3L, 3M) arranged on the horizontal fixing surface 2a of the magnetic fixing device 2C.
The magnetic fixing device 2C comprises a plurality of magnetic fixing units (magnetic fixing units 11A and 11B as shown in FIG. 5) arranged in a matrix of two or more rows and two or more columns in a plan view. It is incorporated in the upper end side part. However, although a plurality of magnetic force type fixing units may be incorporated in the lower end side portion, the plurality of magnetic force type fixing units in the lower end side portion are not indispensable.

A fixing surface 2a located in the reference horizontal plane H is formed on the upper surface of the magnetic fixing device 2C. The plurality of columnar supports 3 are the same as those shown in FIG. 1, but columnar supports 3 as shown in FIGS. 6 to 13 may be adopted. A support portion 3a is formed at the upper end of each columnar support 3. The plurality of columnar supports 3 are set so as to fix the plurality of clamp target portions 4 at the lower end of the workpiece W and the plurality of clamp target portions 4 located at two or more height direction positions from the fixing surface 2a. ing.

Since the positions of the plurality of clamped target portions 4 at the lower ends of the workpiece W in the height direction are not constant and are located in a plurality of different height directions, the height dimension from the lower end of each columnar support 3 to the support portion 3a is , The clamp target portion 4 supported by the columnar support 3 is set to a size that can support it. According to this clamp system 1A, even when the lower end portion of the workpiece W is not a flat surface, if there are a plurality of clamp target portions 4, it can be fixedly supported via a plurality of columnar supports 3, so that it is general purpose. It is a clamp system with excellent properties and practicality. In addition, it has the same actions and effects as in Example 1.

Next, an example of partially modifying the above embodiment will be described.
1) The magnetic force-type fixing device 2 instead of fixing the base member B in a magnetic force may be fixed by bolts or the like.
2) If a screw hole cannot be formed at the lower end of the workpiece, the part to be clamped and the screw hole may be formed in a plate piece fixed to the workpiece by welding or adhesion.

3) The magnet type fixing unit is not limited to a square shape in a plan view, and can be formed in a circular shape in a plan view.
4) When a flat surface is formed at the lower end of a part of the workpiece W (for example, the left half), the flat surface is directly adsorbed and fixed to the first fixed surface, and the rest of the workpiece W is fixed. It may be fixed to the second fixing surface via a plurality of columnar supports 3. In this case, the levels of the first fixing surface and the second fixing surface from the upper surface of the base member may be different.

5) In addition, those skilled in the art can carry out the embodiment with various modifications added to the above embodiment, and the present invention also includes such modifications.

The present invention is a clamp system for fixing various workpieces to be machined, even when the lower end of the workpiece has a concave portion, a convex portion, a step, an inclined surface, or the like and is not formed into one horizontal plane. Provides a clamping system that can be clamped reliably.

W work piece (clamp target)
1,1A Clamp system 2,2A to 2C Magnetic fixing device 2a Fixing surface 3,3A to 3M Columnar support 4 Clamp target part 11A, 11B Magnetic fixing unit 3a, 53a, 59a Support part 20 Base part 21 Rod part 22 , 22C-22F, 22I, 22J Connecting means 21a, 21b Screw hole 21c Screw hole 26, 26C, 26D, 26E Screw hole 30, 33 Fixing screw Shaft 31, 34 Screw shaft 41 Bolt member 42, 47 Lower rod 43 , 48 Upper rod part 44,49 Screw mechanism 37 Bolt hole 38a Screw shaft part 38 Bolt member Fa Bolt insertion hole 41 Bolt member 57 Permanent magnet 62 Electromagnet

Claims (11)

A clamping system for securing the clamp object using a switchable magnetic fixing means in the suction release state the adsorption state,
One or more magnetic fixing means having a fixed surface located in the horizontal reference plane at the upper end, and
A plurality of columnar supports that are attracted and fixed to the fixing surface, and include a plurality of columnar supports that fix the object to be clamped to one or a plurality of magnetic force type fixing means .
The magnetic fixing means also has a base-side fixing surface parallel to the fixing surface on the side opposite to the fixing surface, and has a base-side fixing surface capable of attracting a base member on which the magnetic fixing means is installed. Su
Clamping system, characterized in that that. The plurality of columnar supports are set so as to fix a plurality of clamp target portions at the lower end of the clamp target object and at two or more height direction positions from the fixing surface, respectively. The columnar support has a support portion that receives the clamp target portion, and the height dimension from the lower end of each columnar support to the support portion is set to a dimension that can support the corresponding clamp target portion. The clamp system according to claim 1. The columnar support includes a base portion that can be attracted to the fixed surface, a rod portion that rises upward from the base portion, and a connecting means that connects the rod portion to the clamp target portion so as to be disconnectable. The clamp system according to claim 2. The third aspect of claim 3, wherein the connecting means is a screw shaft portion integrally formed at the upper end of the rod portion, and includes a screw shaft portion screwed into a screw hole of the clamp target portion. Clamp system. The connecting means is a fixing screw shaft portion screwed into the screw hole of the rod portion and a screw shaft portion integrally formed at the upper end of the fixing screw shaft portion, and is screwed into the screw hole of the clamp target portion. The clamp system according to claim 3, further comprising a screw shaft portion to be formed. The rod portion of the columnar support includes a lower rod portion and an upper rod portion arranged concentrically and in series, and a screw mechanism for connecting the lower rod portion and the upper rod portion so as to be expandable and contractible in the axial direction. The clamp system according to claim 3, wherein the clamp system has. The connecting means is a bolt member having a bolt hole formed through the base portion and the rod portion and a screw shaft portion that is inserted into the bolt hole from the base portion side and projects to the outside of the upper end of the rod portion. The clamp system according to claim 3, wherein the clamp system has. The clamp according to claim 3, wherein the connecting means comprises a bolt member that is inserted into a bolt hole formed in an object to be clamped from above and screwed into a screw hole formed in the rod portion. system. The clamp system according to claim 3, wherein the connecting means comprises a permanent magnet or an electromagnet. The clamp system according to claim 6, wherein the connecting means comprises an electromagnet including the upper rod portion and a coil wound around the outer peripheral side of the upper rod portion. The clamp system according to any one of claims 1 to 9, wherein a plurality of columnar supports are provided on the fixing surface of the one magnetic fixing means .