JP2018062029A - Clamp system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp system capable of fixing a clamp object region present in two or more height-direction positions of a clamp object, and allowing for strengthening of clamp force when necessary.SOLUTION: A clamp system 1 for fixing a clamp object W by using magnetic force type fixation means switchable to an attracting state and an attracting release state, comprises one or a plurality of magnetic force type fixation devices 2 having on the upper end a fixation surface 2a positioned in a horizontal reference surface H and a plurality of columnar support bodies 3 attracted-fixed to the fixation surface 2a, that is, the plurality of columnar support bodies 3 for fixing the clamp object W to the one or the plurality of magnetic force type fixation devices 2. The plurality of columnar support bodies 3 are set so as to respectively fix a plurality of clamp object regions 4, that is, the plurality of clamp object regions 4 present in two or more height-direction positions from the fixation surface 2a, and a height dimension up to a support part 3a from the lower end of the respective columnar support bodies 3 is set in a dimension enabling the corresponding clamp object region 4 to be supported.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a clamping system that clamps a workpiece or the like to be machined by a magnetic fixing means, and relates to a clamping system that can clamp an object to be clamped with a flat bottom end.

  Various types of magnetic fixing devices are widely used in practical use, in which a plurality of sets of magnetic fixing units are incorporated in a steel board member, and a flat fixing surface is formed on the upper end surface of the board member to fix an object to be clamped. Yes. For example, in the magnetic-type fixing device described in Patent Document 1, a plurality of magnetic-type fixing units are incorporated in a lower part of a rectangular parallelepiped steel block, and a plurality of magnetic-type fixing units are also incorporated in an 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 clamping object can be attracted to the fixing surface at the upper end of the magnetic type fixing device by magnetic force.

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

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

In the conventional magnetic type fixing device, clamping is performed in a state in which the lower end surface of the clamping object is in surface contact with the flat horizontal fixing surface of the magnetic type fixing device.
However, in the clamp target, there is no flat surface on the lower end side, and one or a plurality of concave portions, convex portions, steps, ribs, protrusions, inclined surfaces, and opening holes may be formed. Not a few.

  In the conventional magnetic type fixing device, it has been impossible to fix a clamp target whose surface to be attracted is not flat as described above. For this reason, clamp objects to which the magnetic fixing device can be applied are remarkably restricted, and there are many cases where the magnetic fixing device cannot be effectively used.

  The objective of this invention is providing the clamp system which can fix the clamp object site | part in two or more height direction positions of a clamp object, and can strengthen a clamping force as needed.

  The clamp system according to claim 1 is a clamp system for fixing an object to be clamped using a magnetic-type fixing means that can be switched between an adsorption state and an adsorption release state, and includes a fixing surface located in a horizontal reference plane at an upper end. One or a plurality of magnetic type fixing devices, 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 one or more magnetic type fixing devices. It is characterized by that.

  According to said structure, a some columnar support body is adsorbed and fixed to the said fixed surface of one or several magnetic type fixing devices, and a clamp target object is fixed to one or several magnetic type fixing devices by these columnar support members. be able to. Even when the height direction positions of the plurality of clamp target portions of the clamp target are not constant, the clamp target can be fixed using a plurality of columnar supports having different height dimensions.

  The clamp system according to a second aspect is the invention according to the first aspect, wherein the plurality of columnar supports are a plurality of clamp target portions at a lower end of the clamp target and are at two or more height direction positions from the fixed surface. Each of the columnar supports has a support part that receives the clamp target part, and the height dimension from the lower end of each columnar support to the support part corresponds to each other. It is characterized in that it is set to a dimension that can support the clamping target part.

  According to said structure, the some clamping object site | part in two or more height direction positions can be fixed using the some columnar support body respectively corresponding to them.

  According to a third aspect of the present invention, there is provided the clamping system according to the second aspect, wherein the columnar support includes a base portion that can be adsorbed to the fixed surface, a rod portion that rises upward from the base portion, and a portion to be clamped. And a connecting means for releasably connecting.

  According to said structure, since the said columnar support body is a simple structure which consists of a base part, a rod part, and a connection means, it can manufacture at low cost.

According to a fourth aspect of the present invention, there is provided the clamp system according to the third aspect, wherein the connecting means is a screw shaft portion integrally formed at an upper end of the rod portion and is screwed into a screw hole of the clamp target portion. It consists of a shaft part.
According to said structure, since the said connection means consists of a screw shaft part integrally formed in the upper end of the said rod part, and screwed in the screw hole of a clamp object site | part, a clamp object site | part is up-and-down. It can be fixed so that it does not move in the direction.

  According to a fifth aspect of the present invention, in the clamp system according to the third aspect, the connecting means includes a fixed screw shaft portion screwed into the screw hole of the rod portion and a screw integrally formed on the upper end of the fixed screw shaft portion. It has a screw shaft portion which is a shaft portion and is screwed into the screw hole of the clamp target portion. According to said structure, since a connection means is a member different from a rod part, only a connection means can be replaced | exchanged for the connection means from which size differs. Moreover, the support part at the upper end of the rod part can be processed easily and accurately.

The clamp system according to claim 6 is the invention according to claim 3, wherein the rod portion of the columnar support body includes a lower rod portion and an upper rod portion arranged concentrically and in series, the lower rod portion and the upper rod. And a screw mechanism for connecting the portions in an axial direction so as to be extendable and contractible.
According to said structure, since the height dimension from the lower end of a columnar support body to the said support part can be adjusted via a screw mechanism, the versatility of a columnar support body can be improved.

  According to a seventh aspect of the present invention, there is provided the clamp system according to the third aspect, wherein the connecting means includes a bolt hole formed in the base portion and the rod portion so as to penetrate therethrough, and is inserted into the bolt hole from the base portion side. And a bolt member having a screw shaft portion projecting outside the upper end of the rod portion. According to said structure, a columnar support body can be easily connected to a clamp | tightening object site | part by rotating a bolt member.

According to a clamp system of an eighth aspect, in the invention of the third aspect, the connecting means is inserted from above into a bolt insertion hole formed in an object to be clamped and screwed into a screw hole formed in the rod portion. It has a bolt member.
According to said structure, a columnar support body can be easily connected to a clamp object site | part by rotating a bolt member from the upper surface side of a clamp object.

According to a ninth aspect of the present invention, in the invention of the third aspect, the connecting means is made of a permanent magnet or an electromagnet.
According to the above configuration, the rod portion of the columnar support can be connected to the clamp target portion via the permanent magnet or the electromagnet even when a screw hole or a bolt hole cannot be formed in the clamp target. The versatility of the system and the versatility of the columnar support can be enhanced.

According to a tenth aspect of the present invention, there is provided the clamp system according to the sixth aspect, 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.
According to this configuration, since it is possible to generate a strong adsorption force on the small support portion, it is possible to strongly clamp even when the clamping target portion is narrow.

A clamp system according to an eleventh aspect is characterized in that, in the invention according to any one of the first to ninth aspects, a plurality of connection supports are provided on a fixing surface of the one magnetic type fixing device.
According to said structure, the number of magnetic type fixing devices can be made into the minimum number.

A clamping system according to a twelfth aspect is the invention according to any one of the first to ninth aspects, wherein the magnetic fixing device is a base-side fixing surface parallel to the fixing surface on a side opposite to the fixing surface. And a base-side fixing surface capable of adsorbing a base member on which the magnetic type fixing device is installed.
According to said structure, since the said magnetic-type fixing device can be fixed to the upper surface of a base member with a magnetic force, in order to fix the said magnetic-type fixing device to a base member, a bolt hole and T groove | channel are formed in a base member. There is no need to form. Further, the magnetic fixing device can be freely moved.

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

It is a front view of the clamp system concerning Example 1 of the present invention. It is a top view of a magnetic-type fixing device. It is sectional drawing of a magnetic-type fixing device (work adsorption | suction state). It is a fragmentary sectional view of a magnetism type fixing device (work adsorption release state). It is a disassembled perspective view of a magnetic-type fixing unit. It is principal part sectional drawing which shows the 1st modification of a connection means. It is principal part sectional drawing which shows the 2nd modification of a connection means. It is principal part sectional drawing which shows the 3rd modification of a connection means. It is principal part sectional drawing which shows the 4th modification of a connection means. It is principal part sectional drawing which shows the 1st modification of a columnar support body. It is principal part sectional drawing which shows the 2nd modification of a columnar support. It is a front view which shows the 3rd modification of a columnar support body. It is a front view which shows the 4th modification of a columnar support body. It is a front view of the clamp system concerning Example 2 of the present invention.

  Next, the form for implementing this invention is demonstrated based on an Example.

Next, a clamp system of the present invention according to Example 1 will be described with reference to the drawings.
The clamp system 1 is a clamp system that fixes an object to be clamped (hereinafter referred to as a workpiece W) using a magnetic-type fixing means that can be switched between an adsorption state and an adsorption release state. As shown in FIG. 1, the clamp system 1 includes a plurality of magnetic fixing devices 2 having a fixing surface 2 a located in the horizontal reference plane H at the upper end, and a plurality of columnar supports fixed to the fixing surface 2 a by suction. It is the body 3, Comprising: The several columnar support body 3 which fixes the workpiece W to the several magnetic type fixing device 2 is provided.

  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, which are at two or more height direction positions from the fixing surface 2a. Each columnar support 3 has a support part 3a for receiving the clamp target part 4 from below, and the height dimension from the lower end of each columnar support 3 to the support part 3a can support the corresponding clamp target part 4 The dimensions are set. That is, when the clamp target part 4 is directly supported by the support part 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 part 4. Is set.

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

  The four sets of magnetic fixed units 11A and 11B on the upper side are arranged close to each other in a matrix of 2 rows and 2 columns in plan view. These four sets of magnetic fixed units 11A and 11B have the same structure. The lower four sets of magnetic fixed units 11A and 11B are arranged close to each other in a matrix of 2 rows and 2 columns in plan view. These four sets of magnetic fixed units 11A and 11B have the same structure.

The upper magnetic fixed units 11A and 11B will be described.
As shown in FIG. 5, the magnetic force type fixing units 11 </ b> A and 11 </ b> B include a steel square steel plate 12, eight permanent magnets 13 disposed on the outer peripheral side of the steel plate 12, and a steel A square thick plate-shaped alnico magnet 14 disposed in contact with the lower surface of the thick plate 12, a square frame-shaped coil 15 disposed on the outer peripheral side of the alnico magnet 14, and these steel thick plates 12. And a through bolt 16 for fixing the alnico magnet 14 to the main body member 10.

  As shown in FIG. 3, the permanent magnet 13 has the direction of the magnetic field in the horizontal direction, and the permanent magnet 13 of the magnetic force type fixing unit 11A on the left side of FIG. The permanent magnet 13 of the right magnetic fixed unit 11B has an S pole on the steel plate 12 side. The permanent magnet 13 between a pair of magnetic fixing units 11A and 11B adjacent to the left and right is shared by the magnetic fixing units on both sides. Similarly, the permanent magnet 13 between a pair of magnetic fixing units 11A and 11B adjacent to each other in front and rear is 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 energization direction to the coil 15, a state in which an upward magnetic field is applied to the alnico magnet 14 and a downward magnetic field are 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 where the upper four sets of magnetic fixing units 11A and 11B are in an attracting state in which an external object M can be attracted to the fixing surface 2a. The alnico magnet 14 of the left magnetic fixing unit 11A has an N pole on the upper surface side, and the alnico magnet 14 of the right magnetic fixing unit 11B has an S pole on the upper surface. As shown in FIG. Since a closed loop magnetic path is formed in the thick plate 12, the permanent magnet 13, the alnico magnet 14, and the external object M, they are in an attracting state.

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

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

Next, the columnar support 3 will be described.
As shown in FIG. 1, the columnar support 3 includes a base portion 20 that can be adsorbed to the fixed surface 2 a, a rod portion 21 that rises upward from the base portion 20, and the rod portion 21 that is disconnected from the clamp target portion 4. And connecting means 22 for enabling connection. The columnar support 3 shown in FIG. 1 is an integral steel member.

  As shown in FIG. 2, the base portion 20 is made of a circular thick plate having a diameter substantially equal to the lateral width of the 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. Although the thickness of the base part 20 is not specifically limited, the thickness which can form 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 as a smooth surface.

  The rod portion 21 is a solid member having a circular cross section smaller in diameter than 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, it is not limited to a smaller diameter than the base portion 20, and may be the same diameter. Further, the shape is not limited to a circular cross section, and may be a square shape, a rectangular shape, or other shapes. 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 is not limited to this, and includes that whose height dimension is smaller than the width dimension. .

At the upper end of the rod portion 21, a horizontal support portion 3a for receiving the clamp target portion 4 of the workpiece W is formed on a flat surface.
Since the position in the height direction from the fixed surface 2a of the plurality of clamp target parts 4 at the lower end of the workpiece W is not constant and is in a plurality of height direction positions, it is suitable for supporting the plurality of clamp target parts 4 respectively. A plurality of columnar supports 3 having different dimensions are employed. 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 part 4 (that is, the clamp target part 4 corresponding to the columnar support 3) supported by 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 formed by a screw shaft portion 25 that is integrally formed at the upper end of the rod portion 21 and rises 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 is not limited thereto. Since the screw shaft part 25 rises vertically from the center part of the support part 3a, the support part 3a has an annular surface.

  A flat surface that is received by the support portion 3a of the rod portion 21 is formed in the clamp target portion 4 of the workpiece W, 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 type fixing devices 2 </ b> A and 2 </ b> B are arranged on the upper surface of the base member B so as to be separated from each other on the left and right sides, and the fixing surfaces 2 a are positioned in the reference horizontal plane H. In addition, at the lower end of the workpiece W, a first clamp target part 4a and a second clamp target part 4b at a position lower than the first clamp target part 4a are formed.

  The first columnar support 3A in which the screw shaft portion 25 is screwed to the first clamp target portion 4a is adsorbed and fixed to the fixing surface 2a of the magnetic force type fixing device 2A on the left side of FIG. The second columnar support 3B, in which the screw shaft portion 25 is screwed to 4b, is adsorbed and fixed to the fixing surface 2a of the magnetic force type fixing device 2B on the right side of FIG. 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 is clamped by using two magnetic fixing devices 2 </ b> A and 2 </ b> B and two columnar supports 3 </ b> A and 3 </ b> B. It is also possible to clamp the workpiece W using three or more columnar supports 3.

  In addition, as shown in Example 2 to be described later, instead of the plurality of magnetic fixing devices 2, one large magnetic fixing device 2C incorporating a large number of magnetic fixing units, and a plurality of columnar supports 3 are provided. You may comprise so that the workpiece W may be clamped using.

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

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

Since the connecting means 22 is a screw shaft portion 25 formed integrally with 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 as not to move.

Next, a first modification of the connecting means 22 will be described.
As shown in FIG. 6, the connecting means 22 </ b> C of the columnar support 3 </ b> C includes a fixed screw shaft portion 30 screwed into the screw hole 21 a of the rod portion 21 and a screw integrally formed on the upper end of the fixed screw shaft portion 30. A screw member 32 having a shaft portion 31 is provided. The screw shaft portion 31 is formed with a smaller diameter than the fixed screw shaft portion 30 and is screwed into the screw hole 26 </ b> C 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. In addition, the support portion 3a can be easily and accurately processed.

Next, a second modification of the connecting means 22 will be described.
As shown in FIG. 7, the connecting means 22 </ b> D of the columnar support 3 </ b> D includes a fixed screw shaft portion 33 screwed into the screw hole 21 b of the rod portion 21 and a screw integrally formed on the upper end of the fixed 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 26 </ b> D of the clamp target portion 4. The fixing screw shaft portion 33 is fixed to the rod portion 21 by a set screw 36 so that the fixing can be released. 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 is not loosened, the replacement is further facilitated.

Next, a third modification of the connecting means 22 will be described.
As shown in FIG. 8, the connecting means 22E of the columnar support 3E includes a bolt hole 37 formed in the base portion 20 and the rod portion 21 so as to penetrate therethrough, and is inserted into the bolt hole 37 from the base portion 20 side and is connected to the rod portion. And a bolt member 38 having a screw shaft portion 38a that protrudes out of the upper end of the screw 21 and is screwed into the screw hole 26E of the clamp target portion 4. In this case, the columnar support 3 </ b> E can be easily connected to the clamp target portion 4 by rotating the bolt member 38.

Next, a fourth modification 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. Set on the upper surface of the flange portion F, the positioning ring 40 attached to the lower portion of the rod portion 21, the fitting hole 21 d formed in the upper end portion of the rod portion 21 so that the lower-diameter portion 40 a of the lower portion of the positioning ring 40 is fitted. And a bolt member 41 inserted from above the flange portion F and inserted through the washer 41a and the positioning ring 40 and screwed into the screw hole 21c. In this case, by rotating the bolt member 41 from the upper surface side of the workpiece W, the columnar support 3F can be easily connected to the clamping target portion 4. In addition, since the positioning ring 40 is provided, the workpiece W can be positioned.

Next, a first modification 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 43 arranged concentrically and in series, and the lower rod portion 42 and the upper rod portion 43 extend and contract in the axial direction. And a screw mechanism 44 that can be connected. The screw mechanism 44 includes a screw hole 45 formed in the lower rod portion 42 and a screw shaft portion 46 formed so as to protrude downward in the upper rod portion 43 and screwed into the screw hole 45. Have. Note that spanner engaging portions 42a and 43a are formed in the lower rod portion 42 and the upper rod portion 43, respectively.

Although the same connection means as the connection means 22D shown in FIG. 7 is adopted as the connection means, any of the connection means 22 and 22C shown in FIGS. 1 and 6 may be adopted.
According to the columnar support 3G described above, 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 capable of supporting the clamp target portion 4 via the screw mechanism 44. The versatility of the columnar support 3G can be improved.

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

Although the same connecting means as the connecting means 22 shown in FIG. 1 is used as the connecting means, any of the connecting means 22C and 22D shown in FIGS. 6 and 7 may be used.
According to the columnar support 3H described above, 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 capable of supporting 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 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 includes a lower rod portion 52, an upper rod portion 53 disposed 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. And a screw mechanism 54 connected to be extendable. A flat support portion 53 a is formed at the upper end of the upper rod portion 53.

The screw mechanism 54 includes a screw hole 55 formed in the lower rod portion 52 and a screw shaft portion 56 formed so as to protrude downward in the upper rod portion 53 and screwed into the screw hole 55. However, a screw mechanism 49 as shown in FIG.
The connecting means 22 </ b> I is composed of a rectangular parallelepiped block-shaped permanent magnet 57 that is separate from the upper rod portion 53. The permanent magnet 57 is preferably composed of a neodymium magnet or the like that generates a strong magnetic force.

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

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

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

Next, a fourth modification 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 includes a lower rod portion 58, an upper rod portion 59 disposed 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. And a screw mechanism 60 that is connected to be stretchable. A flat support portion 59 a is formed at the upper end of the upper rod portion 59.

The screw mechanism 60 includes a screw hole 61 formed in the lower rod portion 58 and a screw shaft portion 62 formed so as to protrude downward in the upper rod portion 58 and screwed into the screw hole 61. A coil 61 wound in multiple layers is provided on the outer peripheral side of the upper rod portion 59, and the upper rod portion 59 and the coil 61 constitute an electromagnet 62 capable of generating a strong attractive force. When the above-described electromagnet 62 is employed as the connecting means 22J, the diameter of the electromagnet 62 can be reduced while securing the attractive force, so that even if the clamp target portion 4 is a narrow flat surface, it can be attracted and fixed.
Instead of the electromagnet 62, a permanent magnet or a magnetic fixed unit as shown in FIG.

The clamp system 1A includes one magnetic fixing device 2C and a plurality of columnar supports 3 (3K, 3L, 3M) arranged on a horizontal fixing surface 2a of the magnetic fixing device 2C.
The magnetic fixing device 2C includes 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 rows in a plan view. It is incorporated in the upper end side part. However, a plurality of magnetic fixing units may be incorporated in the lower end portion, but the plurality of magnetic fixing units in the lower end portion is not essential.

  A fixed surface 2a located in the reference horizontal plane H is formed on the upper surface of the magnetic force type fixing device 2C. The plurality of columnar supports 3 are the same as the columnar supports 3 shown in FIG. 1, but the columnar supports 3 as shown in FIGS. 6 to 13 may be adopted. A support portion 3 a 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, which are at two or more height direction positions from the fixing surface 2a. ing.

  Since the position in the height direction of the plurality of clamp target parts 4 at the lower end of the workpiece W is not constant and is in a plurality of height direction positions, the height dimension from the lower end of each columnar support 3 to the support portion 3a is The dimension is set so as to support the clamp target portion 4 supported by the columnar support 3. According to this clamp system 1A, even if the lower end portion of the workpiece W is not a flat surface, if there are a plurality of clamp target portions 4, the workpiece W can be fixedly supported via the plurality of columnar supports 3, so that the general purpose It is a clamp system with excellent performance and practicality. In addition, the same operations and effects as those of the first embodiment are obtained.

Next, an example in which the above embodiment is partially changed will be described.
1) Instead of fixing the magnet type fixing device 2 to the base member B with a magnetic force, it may be fixed with a bolt or the like.
2) When a screw hole cannot be formed at the lower end of the workpiece, the clamping target portion and the screw hole may be formed on 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 plan view, and may be formed in a circular shape in 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 fixed to the first fixed surface, and the rest of the workpiece W is You may fix to a 2nd fixing surface via the some columnar support body 3. FIG. In this case, the levels from the upper surface of the base member of the first fixed surface and the second fixed surface may be different.

  5) In addition, those skilled in the art can implement the present invention by adding various modifications to the above-described embodiments, and the present invention includes such modifications.

  The present invention is a clamping system for fixing various workpieces used for machining, even when the lower end portion of the workpiece has a concave portion, a convex portion, a step, an inclined surface, etc. and is not a single horizontal plane. A clamping system capable of reliably clamping is provided.

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

Claims (12)

In a clamp system for fixing a clamp object using a magnetic type fixing means that can be switched between an adsorption state and an adsorption release state,
One or more magnetic locking devices with a fixed surface at the top located within the horizontal reference plane;
A clamp system comprising: a plurality of columnar supports that are fixed to the fixing surface by suction, and a plurality of columnar supports that fix an object to be clamped to one or a plurality of magnetic fixing devices.   The plurality of columnar supports are set to fix a plurality of clamp target parts 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 part for receiving the clamp target part, and the height dimension from the lower end of each columnar support to the support part is set to a dimension capable of supporting the corresponding clamp target part. The clamping system according to claim 1, characterized in that:   The columnar support includes a base portion that can be adsorbed to the fixed surface, a rod portion that rises upward from the base portion, and a coupling means that couples the rod portion to a clamp target portion so as to be uncoupled. The clamping system according to claim 2, characterized in that:   The said connection means is a screw shaft part integrally formed in the upper end of the said rod part, Comprising: The screw shaft part screwed by the screw hole of the said clamping object site | part is characterized by the above-mentioned. Clamp system.   The connecting means includes a fixed screw shaft portion screwed into the screw hole of the rod portion, and a screw shaft portion formed integrally with the upper end of the fixed screw shaft portion, and screwed into the screw hole of the clamp target portion. The clamp system according to claim 3, further comprising a threaded shaft portion.   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 that connects the lower rod portion and the upper rod portion so as to be extendable and contractable in the axial direction. 4. The clamping system according to claim 3, comprising:   The connecting means includes a bolt hole formed through the base portion and the rod portion, and a bolt member that is inserted into the bolt hole from the base portion side and protrudes outside the upper end of the rod portion. The clamp system according to claim 3, further comprising:   4. The clamp according to claim 3, wherein the connecting means includes a bolt member that is inserted from above into a bolt hole formed in the clamp object and is screwed into a screw hole formed in the rod portion. system.   4. The clamping system according to claim 3, wherein the connecting means is made of a permanent magnet or an electromagnet.   The clamp system according to claim 6, wherein the connecting means is composed of an electromagnet including the upper rod portion and a coil wound around an 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 a fixing surface of the one magnetic fixing device.   The magnetic-type fixing device has a base-side fixing surface that is parallel to the fixing surface on the opposite side of the fixing surface and that can attract a base member on which the magnetic-type fixing device is installed. The clamp system according to any one of claims 1 to 9, wherein