TWI412655B - Magnet chatch - Google Patents

Abstract

A magnetic catch is capable of adjusting a distance between fastening holes of a pair of bases in a great range corresponding to a spacing dimension of socketing holes, and is composed of a housing for accepting a magnet and the pair of bases for fastening the housing to a mounting target, each base is composed of an adjusting arm and a base body, the adjusting arm enters a base accepting chamber from a base insertion opening of the housing, the base body has a fastening hole for fastening the mounting target, each adjusting arm is provided with a guiding groove on its inner side end part, a back cover plate of the base accepting chamber is provided with a guiding projection for inserting the two guiding grooves, another side wall of the base accepting chamber is provided with a pair of locking tongue pieces being of elastic deformation in a thickness direction of the side wall, the bases are fixed to the housing by elastically locking a locking dentition of each locking tongue piece and a locking dentition arranged on one side face of each adjusting arm, and the distance of the fastening holes of the bases are adjusted.

Description

Electromagnetic chuck

The present invention relates to an electromagnetic chuck used for connecting two objects by magnetic attraction at a manufacturing site and a use site of the machine.

The electromagnetic chuck used in the prior art is integrally formed with a base portion on the right and left side surface portions of the case body in which the magnet is housed, and a fixed hole for mounting the object is provided in the base portion (see Patent Document 1).

In the electromagnetic chuck of Patent Document 1, since the left and right base portions cannot move relative to the case body, the distance between the fixed holes is fixed, and the pitch size of the through holes on the object side is fixed and the above-mentioned fixing When the distance between the holes does not match, the object to be mounted cannot be applied.

Depending on the size of the through-holes on the side of the object to be mounted, an electromagnetic chuck that changes the distance between the fixed holes is produced, and a small amount of sample is produced, which makes the production cost high. In addition, when a plurality of types of electromagnetic chucks having different distances between the fixed holes are produced, inventory management becomes complicated.

[Previous Technical Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-19646

SUMMARY OF THE INVENTION The object of the present invention is to provide an electromagnetic chuck which can correspond to the distance between the through holes provided in the object to be mounted, and which can increase or decrease the distance between the fixed holes of the pair of bases.

The electromagnetic chuck according to the present invention comprises a case body for accommodating a magnet and a base for fixing the case body to the mounting object, and is inserted into the base from the base insertion opening of the case body. The adjustment arm of the chamber and the base body having a fixing hole for fixing the object to be mounted constitute the bases; a guide slot is provided at an inner end of each of the adjustment arms, and the base is The back cover of the storage chamber is provided with a guiding protrusion for inserting into the two guiding grooves, and the other side wall of the base receiving chamber is provided with one pair of locking tongues elastically deforming in the thickness direction of the side wall, thereby locking each of the foregoing The locking tooth row of the tongue is elastically engaged with the engaged tooth row of the side surface of each of the adjusting arms, and the base is fixedly held by the box body to increase or decrease the fixing hole of the pair of bases. The distance between them.

Thus, in the electromagnetic chuck of the present invention, the pair of bases are slid toward or away from each other, whereby the length of the guide groove of the adjustment arm and the length of the guide protrusion of the back cover can be In a range of twice the difference, the position of the pair of bases relative to the box body is changed, and further, one of the other side walls of the base storage chamber is provided to the locking tooth row of the locking tongue. The pair of bases can be fixedly held by the box body at the changed position by being elastically engaged with the engaged tooth rows of the side portions of the adjustment arms. In other words, according to the present invention, the distance between the fixing holes of the pair of bases can be easily and surely increased and decreased according to the distance between the through holes provided in the object to be mounted, and can be widely used in the fixing device. There are various mounting objects with different sizes from the through holes.

Since one type of electromagnetic chuck can be used for a plurality of mounting objects having different through-hole pitch sizes, mass production can be saved, production costs can be saved, and inventory management can be simplified.

In the illustrated embodiment, the box body 1 formed of a synthetic resin that is easily penetrated by magnetic flux is provided with a magnet housing chamber 2 and a base housing chamber 3 adjacent to each other, and a pair of left and right side walls of the base housing chamber 3 4, 5, the base insertion openings 6, 7 are provided. After the magnet 8 is housed in the magnet housing chamber 2, the inner cover 10 is lightly pressed into the step portion 9 between the magnet housing chamber 2 and the base housing chamber 3, and the inner cover 10 is welded and sealed by a welder. In the box body 1. Thereby, the electromagnetic chuck can also be applied to a clean room of a semiconductor manufacturing facility.

The pair of left and right bases 11 and 12 are the adjustment arms 13 and 14 that enter the base storage chamber 3 from the base insertion openings 6 and 7, and the fixing holes 18 and 19 that are fixed to the installation object 15 . The base bodies 16, 17 are integrally formed. The base insertion openings 6 and 7 are formed such that the concave portions 20 and 21 are formed in an offset manner on one of the long sides of the rectangular shape, and the outer peripheral contours of the adjustment arms 13 and 14 are formed to be fitted to each other. The convex portions 22, 23 of the recesses 20, 21. Further, on the upper surface of the adjustment arm 13 of the base 11 on the left side, a recessed portion 24 is formed adjacent to the convex portion 22, and a ridge portion 25 is formed adjacent to the convex portion 23 on the lower surface of the adjustment arm 14 of the base 12 on the right side. The ridge portion 25 is fitted to the recess portion 24. In terms of the overall function of the fitting, the pair of left and right bases 11 and 12 are closely combined, and are not rocked at any position that slides in the left-right direction.

Openings are formed on the back surface of the base storage chamber 3, and the rear side surfaces of the back cover 26 are provided with check protrusions 27 and 28 having a right-angled triangular cross section, and correspondingly, a pair of side walls 29 and 30 are provided before the base storage chamber 3. The inner surface is provided with check recesses 31, 32 having a right-angled triangle. When the back cover 26 is pressed and inserted into the back opening of the base storage chamber 3, the check projections 27 and 28 are engaged with the check recesses 31 and 32, and the back cover 26 is firmly fixed to the case body. 1. The non-return projections and the check recesses of the right-angled triangles may be provided on the front, rear, left, and right sides.

Guide grooves 33 and 34 which are long in the sliding direction of the base are provided at the inner end portions of the adjustment arms 13 and 14 of the pair of right and left bases 11 and 12. When the adjustment arms 13 and 14 are pressed into the base storage chamber 3 to the deepest extent, the root portions of the respective guide grooves 33 and 34 are in an overlapping positional relationship. At a substantially central portion of the inner surface of the back cover 26, guide projections 35 that are inserted into the two guide grooves 33, 34 are provided. The front end surface of the guide projection 35 abuts against the inner cover 10 together with the adjustment arm 14 of the right base 12. The inner surface of the main body portion of the back cover 26 is in contact with the adjustment arm 13 of the base 11 on the left side.

A pair of right and left locking tongue pieces 36, 37 are provided on the front side wall 42 of the base storage chamber 3 which is orthogonal to the side walls 4, 5 provided with the base insertion openings 6, 7. The locking tabs 36 and 37 are formed by cutting the three sides of the rectangular shape from the base material of the side wall 42 and elastically deforming in the thickness direction of the side wall 42 with the uncut one side as a fulcrum. Two locking tooth rows 38 and 39 are provided on the inner surface side of the end portions of the respective locking tabs 36 and 37. Six locking tooth rows 40 and 41 are provided on the side portions of the adjustment arms 13 and 14, respectively. The locking tooth rows 38 and 39 are elastically engaged with the engaged tooth rows 40 and 41, and the bases 11 and 12 are firmly held by the case body 1.

When the bases 11 and 12 are close to the position of the box body 1 or separated from the box body 1, the distance between the base bodies 16 and 17 fixed to the fixing holes 18 and 19 of the object 15 is changed.

The holder 44 magnetically attracted by the electromagnetic chuck 43 is sealed after the magnetic plate 46 is housed in the case 45 formed of synthetic resin which is easily penetrated by the magnetic flux, and the back plate 47 is welded by a welding machine. The electromagnetic chuck 43 is fastened and fixed by the synthetic resin bolt-nuts 50 and 51 which are inserted into the through holes 48 and 49 of the mounting object 15 from the fixing holes 18 and 19 of the base bodies 16 and 17. The object 15 is provided. The socket member 44 is fastened and fixed by inserting the fixing resin holes 52, 53 from the fixing holes 52, 53 of the casing 45 into the synthetic resin bolt-nuts 57, 58 of the through holes 55, 56 of the other mounting object 54. The other object 54 is installed.

1. . . Electromagnetic chuck body

2. . . Magnet housing

3. . . Base storage room

4, 5. . . Side wall of the base storage compartment

6, 7. . . Base insertion opening

8. . . magnet

9. . . Step difference

10. . . Inner cover

11,12. . . Base

13, 14. . . Adjustment arm

15. . . Electromagnetic chuck mounting object

16, 17. . . Base body

18, 19. . . Fixed hole for fixing to an object to be mounted

20, 21. . . The recess of the opening for inserting the base

22, 23. . . Adjustment arm

twenty four. . . Adjustment arm recess

25. . . Adjustment arm ridge

26. . . Back cover

27, 28. . . Back cover

29, 30. . . Side wall of the base storage compartment

31, 32. . . Check recess of base storage compartment

33, 34. . . Adjusting arm guide groove

35. . . Guide protrusion

36, 37. . . Clamping tongue

38, 39. . . Clamping tooth row

40, 41. . . Stucked tooth row

42. . . Front side wall of the base storage compartment

43. . . Electromagnetic chuck

44. . . Bearing piece

45. . . Seat of the seat

46. . . Magnetic board

47. . . Back plate of the bearing member

48, 49. . . Through hole for mounting object

50, 51, 57, 58. . . Bolt-nut

52, 53. . . Fixing hole of the box

54. . . Other installation objects

55, 56. . . Other through holes for mounting objects

1 is a front view of an electromagnetic chuck according to an embodiment of the present invention, and a pair of right and left bases are in a state in which the insertion box body reaches the deepest state.

Figure 2 is a plan view of the electromagnetic chuck of Figure 1.

Figure 3 is a bottom view of the electromagnetic chuck of Figure 1.

Figure 4 is a left side view of the electromagnetic chuck of Figure 1.

Figure 5 is a right side view of the electromagnetic chuck of Figure 1.

Fig. 6 is a cross-sectional view taken along line A-A of Fig. 1.

Fig. 7 is a cross-sectional view taken along line B-B of Fig. 1.

Figure 8 is a cross-sectional view taken along line C-C of Figure 2;

Fig. 9 is a cross-sectional view taken along line D-D of Fig. 1.

Figure 10 is a front elevational view of the socket used in combination with the electromagnetic chuck of Figure 1.

Figure 11 is a plan view of the socket member of Figure 10.

Fig. 12 is a sectional view taken along line E-E of Fig. 10.

Fig. 13 is a front view showing the state of use of the electromagnetic chuck of Fig. 1 and the socket of Fig. 10, showing the state of releasing the magnetic attraction.

Figure 14 is a front view of the box body of the electromagnetic chuck used in Figure 1.

Figure 15 is a plan view of the box body of Figure 14.

Figure 16 is a left side view of the box body of Figure 14.

Figure 17 is a right side view of the box body of Figure 14.

Figure 18 is a cross-sectional view taken along line F-F of Figure 14.

Figure 19 is a cross-sectional view taken along line G-G of Figure 16.

Figure 20 is a cross-sectional view taken along line H-H of Figure 14.

Fig. 21 is an enlarged view of a portion of the circular chain line of Fig. 20.

Figure 22 is a front view of the left side base of the electromagnetic chuck used in Figure 1.

Figure 23 is a rear view of the base of Figure 22.

Figure 24 is a plan view of the base of Figure 22.

Figure 25 is a bottom view of the base of Figure 22.

Figure 26 is a right side view of the base of Figure 22.

Figure 27 is a cross-sectional view taken along line I-I of Figure 22.

Figure 28 is a front view of the right base of the electromagnetic chuck used in Figure 1.

Figure 29 is a plan view of the base of Figure 28.

Figure 30 is a bottom plan view of the base of Figure 28.

Figure 31 is a left side view of the base of Figure 28.

Figure 32 is a cross-sectional view taken along line J-J of Figure 28.

Figure 33 is a front view of the back cover of the electromagnetic chuck used in Figure 1.

Figure 34 is a plan view of the back cover of Figure 33.

Figure 35 is a right side view of the back cover of Figure 33.

Figure 36 is a cross-sectional view taken along line K-K of Figure 34.

1. . . Electromagnetic chuck body

3. . . Base storage room

4, 5. . . Side wall of the base storage compartment

6. . . Base insertion opening

11,12. . . Base

13. . . Adjustment arm

16, 17. . . Base body

18. . . Fixed hole for fixing to an object to be mounted

33. . . Adjusting arm guide groove

35. . . Guide protrusion

36, 37. . . Clamping tongue

38, 39. . . Clamping tooth row

40. . . Stucked tooth row

43. . . Electromagnetic chuck

Claims (1)

An electromagnetic chuck is configured by respectively forming a box body in which a magnet is housed and a base for attaching the box body to the mounting object, and entering the base receiving chamber from the base insertion opening of the box body. The adjustment arm and the base body having a fixing hole for fixing the object to be mounted constitute the base body; a guide slot is provided at an inner end portion of each of the adjustment arms, and the base is accommodated in the base The back cover of the chamber is provided with a guiding protrusion for inserting into the two guiding grooves, and the other side wall of the base receiving chamber is provided with one pair of locking tongues elastically deforming in the thickness direction of the side wall, by making the aforementioned locking tongues The locking engagement of the piece is elastically engaged with the engaged tooth row of the side surface of each of the adjustment arms, and the base is fixedly held by the case body to increase or decrease the adjustment between the fixing holes of the pair of bases The distance.