JP5378758B2 - Fastening device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform fixing operation of a fastening pin and a fastening bush from the side to the fastening pin; and to provide a fastening device capable of easily and securely realizing fixing of the fastening pin and the fastening bush. <P>SOLUTION: For fitting and fastening between the fastening bush 10 and the fastening pin 12, a fastening driving wedge 70 and an unfastening driving wedge 76 are moved according to rotation of a driving spindle 82 stored in an operation hole 48 so as to move a fastening/unfastening passive wedge 52 by a wedge mechanism formed among those wedges 70, 76 and the fastening/unfastening passive wedge 52. A steel ball 50 is pressed on a tapered pressing surface 60 provided for the fastening/unfastening passive wedge 52 and is projected from an outer peripheral surface of a pin body part 34 to be engaged with a tapered engagement surface 26 of the fastening bush 10 for fastening. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a fastening device, and in particular, a fastening device that can be preferably used to fasten a base element attached to a machine tool table such as a machining center and a jig plate to which a predetermined jig is fixed. It is about improvement.

  Conventionally, there are various structures of fastening devices for fastening two members, and among them, the device is appropriately selected and used according to the shape and application of the member to be fastened. ing. For example, various fastening devices are also used in machine tools such as machining centers.

  That is, in general, in a machine tool such as a machining center, various jigs such as a clamp and a vise are used to hold a workpiece to be machined. In many cases, the jig plate is fixed to a jig plate, and various jigs are attached to the base element by fastening the jig plate to the base element. It is supposed to be. A predetermined fastening device is used for fastening the jig plate and the base element to each other.

  Incidentally, as one of such fastening devices, Japanese Patent Laid-Open No. 8-170607 (Patent Document 1) discloses a fastening pin that is fixed to a base element or a jig plate and fixed to a position. There has been proposed a fastening device having a structure in which a fastening pin attached to a fixed position with respect to any one of them has a fastening bush that can be inserted and fitted in the axial direction. In this fastening device, a predetermined screw member screwed into a screw hole provided in the fastening pin is screwed into the screw hole so that the fastening pin is inserted into the fastening bush in the axial direction. By being moved, the steel ball arranged inside the fastening pin is pressed and moved in the direction perpendicular to the axial direction by the pressing surface that is moved together with the screw member, and the fastening pin A portion provided on the inner peripheral surface of the fastening bush with respect to the projecting portion of the steel ball in a state in which the fastening pin is inserted into the fastening bush when being inserted into the fastening bush. The engaging portions are engaged with each other, and the engaging portions provided on the outer peripheral surface of the fastening bush are engaged with the fastening pins so that the fastening pins are inserted into the fastening bush. And it is configured such that the relative movement can be prevented in the axial direction.

  If the fastening device having such a structure is used, with the fastening pin and the fastening bush attached to the base element and the jig plate, respectively, the fastening pin is simply inserted into the fastening bush, and the screw member is attached. By simply screwing into the screw holes, the base element and the jig plate can be fastened very easily and quickly.

  However, in the fastening device having such a structure, in a state where the fastening pin and the fastening bush are fitted, a screw member is provided so that the steel ball protrudes outward and the fastening pin and the fastening bush are fixed. In the prior art, such a screwing operation of the screw member is performed from above the base element to be fastened and the jig plate through a hole penetrating the jig plate. Therefore, when a workpiece or a jig is already arranged on the jig plate, the screw member cannot be screwed in. There are inherent problems such as being unable to fix.

  In addition, a fastening device including such a fastening pin and a fastening bush is generally disposed between the base element and the jig plate so as to be positioned at the four corners of the jig plate. In addition, when placing workpieces and jigs so as to avoid the four corners of the jig plate so that the screwing operation of the screw member from the jig plate is not hindered, The effective area that can be used is limited, which makes it difficult to effectively use the jig plate.

  Therefore, in order to solve such a problem, the present inventors, in Japanese Patent Application Laid-Open No. 2004-286086 (Patent Document 2), are fastened to be fixed to one of two members to be fastened. A predetermined gap is formed between the two members in a state in which the distal end portion of the protruding pin body portion of the fastening pin attached to the other member to be fixed to the other member is inserted and fitted into the bush. On the other hand, the fastening device having the structure in which the operating means is provided on the outer peripheral surface of the pin main body exposed between the members has been clarified. That is, in such a fastening device, after inserting and fitting a fastening bush and a fastening pin respectively fixed to two members to be fastened, the operation means is used by utilizing a gap between the two members. By operating from the side, the second moving means is moved in the axial direction via the operating / actuating mechanism provided in the pin body portion of the fastening pin, and thus the first moving means is moved in the direction perpendicular to the axis. The two members are moved and protruded from the outer peripheral surface of the pin main body portion and engaged with a disengagement preventing engagement portion provided on the fastening bush, thereby fastening the two members.

  According to this fastening device, the two members to be fastened can be fastened easily and quickly by operation from the side of the device, and the fastening of these two members can be released as much as possible. In such a fastening device, a mechanism for fastening or releasing between the fastening bush and the fastening pin, that is, the first moving means and the fastening device can be quickly performed with little effort. Since the operation / actuation mechanism for moving the second moving means is constituted by a so-called cam operation using an eccentric shaft, the first and second movements can be performed with a slight movement of the operation / operation mechanism. As a result, the means is moved, and as a result, a new problem that the fastening is easily loosened is caused.

JP-A-8-170607 JP 2004-286086 A

  Here, the present invention has been made in the background as described above, and the solution is to fix the fastening operation between the fastening pin and the fastening bush among the two members to be fastened. The fastening pin located between the two members can be operated from the side, and the fastening pin and the fastening bush can be fixed easily and reliably. An object of the present invention is to provide a fastening device that can be realized.

And in this invention, in order to solve this subject, (a) The fastening bush attached to a position fixing with respect to a 1st member, (b) It attaches to a position fixing with respect to a 2nd member. And having a pin body portion protruding from the second member, and being inserted into the fastening bush attached to the first member at the tip portion of the pin body portion, A fastening pin that realizes fastening of the first and second members by forming a predetermined gap between the members; and (c) an axial direction inside the tip portion of the pin body portion of the fastening pin. A first moving member disposed so as to be movable in a direction perpendicular to the pin body and projectable from the outer peripheral surface of the pin body, and (d) movable in the axial direction within the pin body of the fastening pin. In the axial direction A second moving member for moving the first moving member in a direction perpendicular to the axial direction by the movement and projecting from the outer peripheral surface of the pin main body; and (e) the fastening pin of the fastening bush. The first body is provided on the inner peripheral surface of the portion into which the pin main body is inserted and fitted, and protrudes from the outer peripheral surface of the pin main body under the inserted state of the pin main body into the fastening bush. A disengagement-engaging engagement portion that engages with the moving member and prevents the movement of the fastening bushing in a direction to disengage the pin body portion from the fastening bush; and (f) between the first and second members A screw provided in an operation hole in a direction perpendicular to the axis provided in the pin body portion of the fastening pin exposed in the gap so as to be orthogonal to the second moving member, and provided on the inner surface of the operation hole in the head The axial direction of the operation hole A drive spindle that can be moved from the outside, and (g) a fastening drive wedge and a detachment drive wedge arranged so as to sandwich the second moving member in the operation hole, and the fastening drive wedge, The drive spindle leg is inserted into the second moving member and the separation driving wedge in a loosely fitted state, and between the fastening driving wedge and the second movement member and between the separation driving wedge and the second wedge. The second moving member is moved in the axial direction based on the axial movement of the drive spindle by a fastening and detaching wedge mechanism respectively provided between the first moving member and the moving member. An operating mechanism configured to perform fastening or release between the fastening bush and the fastening pin by projecting from the outer peripheral surface of the pin body portion of the fastening pin or eliminating the fastening pin; The comprise configured Rutotomoni, the fastening wedge mechanism and the detachment wedge mechanism, respectively, an inclined plane of two identical tilt angle provided in correspondence to said second moving member and the fastening drive wedge engagement And the detachment drive wedge and the second moving member. The detachment inclined surface portion is composed of two inclined surfaces having the same inclination angle, and the fastening inclined surface portion and detachment. The gist of the fastening device is that the inclined surface portions are disposed on both sides of the leg portion of the drive spindle in the axial direction of the second moving member .

Note that according to one desirable embodiment of the fastening device according to according the present invention, the contact area of the inclined surfaces between the fastening drive wedge and said second moving member in the fastening inclined surface portion, said The separation inclined surface portion is configured to be larger than the contact area of the inclined surface between the separation driving wedge and the second moving member.

  Further, in one of the preferred embodiments of the fastening device according to the present invention, the operation is provided at a distal end portion of a leg portion of the drive spindle through which the fastening drive wedge, the second moving member, and the release drive wedge are inserted. A retaining nut having an outer diameter smaller than the inner diameter of the hole is screwed and fixed, and the fastening drive wedge and the release drive wedge are pressed against the second moving member to be connected to each other. In a preferred aspect of the present invention, a sliding bush is provided on the outer peripheral surface of the fastening driving wedge or the detaching driving wedge, and is configured to contact the inner peripheral surface of the operation hole via the sliding bush. The Rukoto.

  Furthermore, in another desirable aspect of the present invention, a positioning pin is erected and disposed on either one of the opposing surfaces of the fastening bush and the fastening pin, and on either one of the opposing surfaces. A positioning hole into which the positioning pin is inserted is formed.

  In addition, according to still another desirable aspect of the fastening device according to the present invention, the first moving member is composed of at least one steel ball.

  In short, in such a fastening device according to the present invention, with respect to a fastening bush attached to one member of two members to be fastened, the fastening member attached to the other member is fixed. In a state where the tip portion of the pin body portion from which the pin protrudes is inserted and fitted, a predetermined gap is formed between the two members, while the pin body portion exposed between the two members is formed. An operation hole is formed on the outer peripheral surface, and the drive spindle accommodated in the operation hole can be operated from the side by utilizing the gap between the two members. Then, by operating such a drive spindle, the drive spindle is moved in the axial direction of the operation hole accommodated, and between the fastening drive wedge and the second moving member, and the detachment drive wedge and the second moving member, The second moving member is moved in the axial direction of the pin main body based on the axial movement of the drive spindle by the fastening and detaching wedge mechanisms respectively provided between the first moving member and the first moving member. It can be made to project from the outer peripheral surface of the pin main body by moving it in a right angle direction.

  Therefore, according to the fastening device according to the present invention, the fitting / fixing operation between the fastening bush and the fastening pin can be performed from the side through the gap formed between the first member and the second member. Since there is no need for an operation such as screwing a screw member through a hole penetrating one side of two members to be fastened as in the prior art, a workpiece or Even if a jig or the like is arranged, it is not hindered that it is difficult to engage and fix the fastening bush and the fastening pin. Thus, the use area of a member on which a work, a jig or the like is arranged can be effectively increased.

  Furthermore, according to such a configuration of the fastening device according to the present invention, the first moving member projected from the outer peripheral surface of the fastening pin that engages with the disengagement prevention engaging portion provided on the fastening bush is connected to the fastening pin. The movement of the second moving member for projecting / accommodating from the pin main body portion is between the fastening driving wedge and the detachment driving wedge arranged so as to sandwich the second moving member, and the second moving member. The fastening drive wedge and the release drive wedge are respectively engaged with the screw provided on the inner peripheral surface of the operation hole, and the shaft is passed through the operation hole. The first and second moving members that are caused in the conventional configuration because they are surely moved and fixed by the drive spindle that is moved in the direction. Problem easily fixed loose, effectively it becomes that are eliminated may, following Te, the fitting and fixing operation and the fastening bush and the fastening pins, it is possible to carry out more reliably.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 schematically shows an example of a fastening device having a structure according to the present invention, which is used to fasten a base element attached to a table of a machine tool such as a machining center and a jig plate. Has been. The fastening device 2 includes a fastening bush 10 and a fastening pin 12, and the fastening bush 10 is positioned above the jig plate 14 and the base element 16 that are vertically opposed to each other. The fastening pin 12 is fixedly attached to the base element 16 positioned below, while being fixedly attached to the jig plate 14.

  More specifically, as shown in FIG. 2, the fastening bush 10 includes a bush body 20 having a substantially cylindrical shape in which an outward flange portion 18 is integrally formed on one end side, and the bush body 20. And a lid member 22 screwed to the other end side. The bush body 20 is formed with an inner hole having an inner diameter that is larger by a predetermined dimension than the outer shape of the distal end portion of the fastening pin 12, and the inner circumferential surface of the bush body 20 has an axial length. An inner convex portion 24 that protrudes radially inward and that extends continuously in the circumferential direction is integrally formed so as to be positioned closer to the flange portion 18 than the substantially intermediate portion.

  Further, the inner convex portion 24 provided on the inner peripheral surface of the fastening bush 10 has a taper surface shape in which the upper surface, which is the side surface on the lid member 22 side, gradually becomes smaller in diameter toward the lower side. On the other hand, the inner peripheral surface below the inner convex portion 24 is a tapered engagement surface 26 that becomes a joint portion, and the bushing side having a tapered surface shape that gradually increases in diameter toward the lower side in the figure. A tapered fitting portion 28 is formed.

  And the fastening bush 10 by which the cover member 22 is screwed with respect to this bush main body 20 is in the state by which the cylindrical part was inserted in the recess 30 formed in the jig | tool plate 14. FIG. As shown in FIG. 1, the flange portion 18 of the bush main body 20 is fixed by a bolt 32 inserted into a screw hole formed in the flange portion 18. In short, since the flange portion 18 of the bush main body 20 is fixed to the jig plate 14 by screwing the bolt 32, the fastening bush 10 is attached to the jig plate 14 in a fixed position. is there.

  On the other hand, the fastening pin 12 constituting the fastening device 2 together with the fastening bush 10 as described above includes a pin main body portion 34 having a substantially cylindrical shape as a whole and steel as a first moving member, as shown in FIG. A ball 50, a fastening / removing passive wedge 52 as a second moving member, which has a substantially cylindrical shape with a predetermined length with a predetermined notch formed on the outer peripheral surface thereof, and the fastening / removing passive wedge 52 sandwiched between them. The fastening drive wedge 70 and the disengagement drive wedge 76 that are respectively disposed in FIG. 3 are integrated with the fastening and disengaging passive wedge 52 by a drive spindle 82 and a nut 90.

  That is, as shown in FIG. 3, the pin main body 34 has a substantially cylindrical shape in which a through hole 44 having a predetermined size is formed at the center, and on the outer peripheral surface of the substantially intermediate portion in the axial direction. A pin-side taper fitting portion 40 having a tapered surface shape gradually increasing in diameter downward, and extending outward in a direction perpendicular to the axial direction by a predetermined length and continuously extending in the circumferential direction. The thick flange portions 42 are integrally provided in a state where the thick flange portions 42 are vertically connected in the axial direction. Further, the peripheral wall portion above the taper fitting portion 40 extends in a direction perpendicular to the axial direction, penetrates the peripheral wall portion in the thickness direction, and laterally on the outer peripheral surface thereof. A plurality of (here, three) circular through-holes 46 are formed at equal intervals in the circumferential direction.

  In each of the plurality of circular through holes 46 provided in the peripheral wall portion of the pin main body portion 34, a steel ball 50 as a first moving member having a diameter smaller than the hole diameter by a predetermined dimension is provided. The circular through-holes 46 are arranged one by one so as to be movable in a direction perpendicular to the axial direction of the pin main body 34, that is, the radial direction of the pin main body 34.

  In addition, the flange portion 42 has an operation hole 48 of a predetermined size in which the center passes through the central portion in the thickness direction and the center of the pin portion is orthogonal to the center of the pin portion. It is formed so as to penetrate through 42 in the radial direction (see FIGS. 3B and 3C). A screw thread (female screw) 49 having a predetermined pitch is formed on the inner peripheral surface on one end side of the inner peripheral surface of the operation hole 48, and the drive spindle shown in FIG. A screw thread (male thread) 85 formed on a head portion 84 of 82 is screwed together. In this manner, the screw 85 provided on the head 84 of the drive spindle 82 and the screw 49 provided on the inner peripheral surface of the operation hole 48 are screwed together, so that according to the amount of rotation of the drive spindle 82, The drive spindle 82 can move in the operation hole 48 in the axial direction.

  Further, in the through hole 44 provided in the axial direction of the pin main body portion 34, a fastening and releasing passive wedge 52 having an outer diameter smaller than the inner diameter of the through hole 44 and having a substantially cylindrical shape is formed in the through hole. 44 is movably inserted and arranged. As shown in FIGS. 4B to 4D, a groove 54 having a predetermined depth is formed on the outer peripheral surface of the fastening and releasing passive wedge 52 as shown in FIGS. 4B to 4D. The notches 56 and 58 formed at a predetermined depth are formed so as to face each other in the radial direction. Further, the groove 54 is formed in a portion corresponding to the circular through hole 46 when the fastening and releasing passive wedge 52 is inserted and arranged in the through hole 44 of the pin main body 34, and the groove 54 is formed on both wall surfaces of the groove. Among these, the wall surface on the upper side (fastening bush side) when the fastening / removing passive wedge 52 is inserted and arranged in the through hole 44 of the pin body portion 34 and configured as the fastening pin 12 has a cross section inclined at a predetermined angle. The tapered pressing surface 60 is a tapered pressing surface 60, and the tapered pressing surface 60 can come into contact with the steel ball 50 inserted and arranged in the circular through hole 46.

  Here, as shown in FIGS. 4B to 4D, the tapered pressing surface 60 has two types of tapered pressing surfaces 60a that change from a small taper angle to a large taper angle on the way. Although it is formed from 60b, this may be a tapered pressing surface 60 having a simple taper angle or a tapered pressing surface 60 divided into a plurality of angles. Thus, by forming the tapered pressing surface 60a having a small angle and the tapered pressing surface 60b having a large angle, the steel ball 50 is fastened when the steel ball 50 is pressed by the tapered pressing surface 60 (60a, 60b). At the start, the steel ball 50 is quickly protruded from the pin main body 34 with a large amount of movement by being pressed by the tapered pressing surface 60b having a large taper angle. 26, when the actual fastening is performed, the steel ball 50 is moved with a small amount of movement by pressing with the tapered pressing surface 60a having a small taper angle, and the fastening is performed more reliably. It becomes possible. In addition, when it is set as the taper-shaped press surface 60 which has several taper angles in this way, two adjacent taper surfaces are radial inside the taper-shaped press surface located in the radial direction outer side among them. The tapered pressing surface that is positioned is configured to have a larger taper angle.

  Further, as shown in FIG. 4D, the notch portions 56 and 58 provided at the lower part in the axial direction of the fastening and releasing passive wedge 52 than the tapered pressing surface 60 are inclined on one wall surface. Along with the surfaces 62 and 64, a long hole 68 is formed so as to penetrate the bottom surface of each notch. The inclined surface 62 of the cutout portion 56 and the inclined surface 64 of the cutout portion 58 are configured such that the wall surfaces facing each other in the axial direction of the fastening and releasing passive wedge 52 are inclined surfaces.

  By the way, the fastening drive wedge 70 and the release drive wedge 76 constituting the wedge mechanism together with the fastening / leaving passive wedge 52 are as shown in FIGS. 5 (a) to 5 (c) and FIGS. 6 (a) to 6 (c), respectively. The cylindrical body has a substantially cylindrical shape having a diameter smaller than that of the operation hole 48 of the pin main body portion 34, each having a through hole 72, 78 at the center thereof. Angled inclined surfaces 74 and 80 are formed.

  Specifically, the fastening drive wedge 70 is disposed in a portion where the screw thread 49 of the operation hole 48 is provided, and the leg portion 86 of the drive spindle 82 is inserted into the through hole 72 at the center thereof. In this state, the inclined surface 74 can come into contact with the inclined surface 62 of the fastening and releasing passive wedge 52. For this reason, the inclined surface 74 and the inclined surface 62 are set to the same inclination angle. The outer diameter of the fastening drive wedge 70 is set to be slightly smaller than the inner diameter of the screw thread 49 so as not to contact the screw thread 49 of the operation hole 48. The detachment drive wedge 76 is disposed inside a portion of the operation hole 48 opposite to the side on which the screw thread 49 is provided, and the drive spindle 82 is inserted into a through hole 78 at the center thereof. The leg portion 86 is inserted and disposed (see FIG. 1). In this state, the two inclined surfaces 80 and 64 are set at substantially the same inclination angle so that the inclined surface 80 can come into contact with the inclined surface 64 of the fastening and releasing passive wedge 52. The outer diameter of the separation driving wedge 76 is set so that the separation driving wedge 76 can be inserted into the operation hole 48 and has a diameter as close as possible to the inner diameter of the operation hole 48. Will be.

  Then, the fastening / releasing passive wedge 52 is placed in the through hole 44 so that the positions of the notches 56 and 58 are in the vicinity of the operation hole 48, and the fastening drive wedge 70 and the separation drive wedge 76 are fastened. Under the state of being disposed in the operation hole 48 so as to sandwich the detachment passive wedge 52, the inclined surface 74 of the fastening drive wedge 70 and the inclined surface 62 of the fastening detachable passive wedge 52 are in contact with each other, whereby the fastening wedge mechanism is On the other hand, the inclined surface 80 of the separation driving wedge 76 and the inclined surface 64 of the fastening / removing passive wedge 52 are in contact with each other to constitute a separation wedge mechanism. At this time, the leg portion 86 of the drive spindle 82 is inserted through the long hole 68 and the through holes 72 and 78 formed in the respective members in a loosely fitted state, and at the distal end portion of the leg portion 86. A nut 90 is attached, and the fastening / removing passive wedge 52, the fastening drive wedge 70 and the release drive wedge 76 are pressed against each other to connect them.

  Here, the inclined surface 74 of the fastening drive wedge 70 is an inclined surface having a larger area than the inclined surface 80 of the release drive wedge 76, and the inclined surface 74 of the fastening drive wedge 70 is the fastening release passive wedge 52. Each of the wedges is configured such that the area when contacting the inclined surface 62 is larger than the area where the inclined surface 80 of the separation driving wedge 76 contacts the inclined surface 64 of the fastening and releasing passive wedge 52. The mechanism is configured. In this way, by increasing the contact area on the side constituting the fastening wedge mechanism, the inclined surface 74 of the fastening drive wedge 70 is pressed with a greater force when the inclined surface 62 of the fastening detachable passive wedge 52 is pressed. As a result, the pressing force of the steel ball 50 by the tapered pressing surface 60 provided on the fastening and releasing passive wedge 52, that is, the force at the time of fastening can be increased.

  Therefore, in the fastening pin 12 having such a structure, an appropriate tool is inserted into the hexagonal hole 88 provided in the head of the drive spindle 82 accommodated in the operation hole 48 exposed to the side of the pin main body 34. Then, by rotating the drive spindle 82, the fastening drive wedge 70 and the separation drive wedge 76 are moved in the axial direction of the operation hole 48, and along with this movement, the fastening drive wedge 70, the separation drive wedge 76 and the wedge. The fastening / disengaging passive wedge 52 constituting the mechanism can be moved in the through hole 44 in the axial direction (axial direction of the fastening pin 12). Then, an operating mechanism is configured so that the pressing operation of the steel ball 50 by the tapered pressing surface 60 and the releasing of the pressing can be performed by the axial movement of the fastening and releasing passive wedge 52. .

  Such a fastening pin 12 is positioned in a state where the cylindrical portion below the flange portion 42 of the pin main body portion 34 is fitted into the mounting recess formed in the base element 16 and positioned. The base element 16 is protruded upward from the upper surface of the base element 16 by inserting a mounting bolt (not shown here) into a screw hole formed in the flange part 42 of the part 34 and fixing the bolt. 16 is fixedly attached to the position.

  By the way, when fastening and releasing the jig plate 14 and the base element 16 by using the fastening device 2 including the fastening bush 10 and the fastening pin 12 having such a structure, the following is performed. Then, it will be operated.

  That is, first, as shown in FIG. 1, the base element 16 and the jig plate 14 are fastened so that the fastening pin 12 and the fastening bush 10 fixed to each other are spaced apart from each other and coaxially positioned. , Facing each other. At this time, the fastening / leaving passive wedge 52 is positioned at the uppermost position within the range in which the inside of the through hole 44 can move, and the pressing action against the steel ball 50 by the tapered pressing surface 60 is not applied. Will be.

  Next, as shown in FIG. 8A, an upper portion of the pin body portion 34 of the fastening pin 12 is inserted into the inner hole of the fastening bush 10 so that the fastening pin 12 is attached to the fastening bush 10. Fit inside. At this time, the insertion position of the fastening pin 12 into the fastening bush 10 is such that the pin side taper fitting portion 40 of the pin main body 34 and the bush side taper fitting portion 28 of the fastening bush 10 are in contact with each other. Between the 10 flange portions 18 and the flange portion 42 of the pin main body portion 34, the position is such that a minute gap is formed.

  After that, in a state where the fastening bush 10 is inserted into the fastening pin 12, the fastening bush 10 is inserted into the operation hole 48 formed on the outer peripheral surface of the flange portion 42 of the pin main body portion 34 through the gap between the jig plate 14 and the base plate 16. An appropriate tool is inserted into the hexagonal hole 88 of the drive spindle 82, and the drive spindle 82 is rotated to move the drive spindle 82, the fastening drive wedge 70, and the release drive wedge 76 in the axial direction of the operation hole 48 (FIG. 8). In the horizontal direction). Along with this movement, the fastening / removing passive wedge 52 is moved in the axial direction of the pin main body portion 34 by the fastening and releasing wedge mechanism provided between the fastening / leaving passive wedge 52 and the fastening drive wedge 70 and the release driving wedge 76 ( In FIG. 8, it is moved in the vertical direction. That is, when the fastening operation is performed, the inclined surface 74 formed on the fastening drive wedge 70 is formed on the fastening / detaching passive wedge 52 with the movement of the drive spindle 82 (leftward movement in FIG. 8). The wedge mechanism composed of the fastening slopes is pressed against 62 and moves the fastening / leaving passive wedge 52 downward.

  In this way, by moving the fastening / releasing passive wedge 52 downward in the through hole 44 of the pin main body portion 34, the steel balls 50 arranged in the circular through holes 46 are respectively fastened and detached passively. It presses with the taper-shaped press surface 60 formed in the outer peripheral surface of the wedge 52, the inside of each circular through-hole 46 is moved to the radial direction outward of the fitting cylinder part 34, and each of these steel balls 50 is pinned. By projecting laterally from the outer peripheral surface of the main body 34, the projecting portion of each steel ball 50 is engaged with the tapered engagement surface 26 of the fastening bush 10 as shown in FIG. It is.

  At this time, as the amount of protrusion of each steel ball 50 from the outer peripheral surface of the pin main body portion 34 is increased by the movement of each steel ball 50, the tapered engagement surface 26 of the fastening bush 10 moves to each steel ball 50. And the entire fastening bush 10 is gradually moved downward, whereby the bush side taper fitting portion 28 is engaged with the pin side taper fitting portion 40, and both of them are pushed. The taper fitting portions 28 and 40 are taper-fitted more firmly, and the flange portion 18 of the fastening bush 10 and the flange portion 42 of the pin main body portion 34 are brought into contact with each other. In such a state, as described above, each steel ball 50 has a tapered pressing surface 60 of the fastening and releasing passive wedge 52 at a portion opposite to the protruding side from the outer peripheral surface of the pin main body 34. Therefore, the protruding state of each steel ball 50 from the pin body 34 is maintained, and the relative movement of the fastening bush 10 and the fastening pin 12 in the radial direction and the vertical direction is reliably and stably prevented. It will be done.

  As a result, the fastening bush 10 and the fastening pin 12 are fastened to each other in a state where the fixed jig plate 14 and the base element 16 cannot be moved relative to each other in the vertical direction and the direction perpendicular thereto. In other words, such a fastening state can be secured stably.

  Further, in order to release the fastening state between the jig plate 14 and the base element 16, the driving spindle 82 is reversed by rotating the driving spindle 82 in the opposite direction to the above-described fastening operation. The moving direction of 82 is reversed (moving rightward in FIG. 8), and the inclined surface 80 formed on the separation driving wedge 76 is pressed against the inclined surface 64 formed on the fastening / detaching passive wedge 52, and the separating slopes are pressed. The fastening / removing passive wedge 52 is moved upward by the wedge mechanism including the parts. As a result, the pressing force in the radially outward direction of the pin main body portion 34 with respect to each steel ball 50 from the tapered pressing surface 60 of the fastening and releasing passive wedge 52 is released, and each of the steel balls 50 is passed through each circular penetration. In the hole 46, the pin body portion 34 is retracted and moved inward in the radial direction, so that the engagement of the protruding portion of each steel ball 50 with the tapered engagement surface 26 of the fastening bush 10 is released.

  Subsequently, the drive spindle 82 is rotated in the reverse direction to move the fastening / removing passive wedge 52 upward, the upper end surface thereof is brought into contact with the inner surface of the lid member 22 of the fastening bush 10, and further from this state, By further continuing the upward movement of the fastening / leaving passive wedge 52, the bottom of the fastening bush 10 (specifically, the inner surface of the lid member 22) is formed at the upper end surface of the head of the fastening / leaving passive wedge 52. ) Is pressed upward to displace the entire fastening bush 10 upward, that is, in a direction away from the fastening pin 12, so that the bushing side taper fitting portion 28 of the fastening bush 10 and the pin side of the fastening pin 12 are moved. A strong taper fitting edge cutting with the taper fitting portion 40 is performed.

  Then, the fastening between the jig plate 14 and the base element 16 is released by moving the fastening pins 12 in the vertical direction so that the fastening pins 12 are pulled out from the inner holes of the fastening bush 10.

  As described above, in the exemplary fastening device 2, the fastening pin 12 attached to the base element 16 is simply inserted into the inner hole of the fastening bush 10 attached to the jig plate 14. The drive spindle 82 inserted into the operation hole 48 exposed in the gap between the jig plate 14 and the base element 16 can be simply operated by rotating the drive spindle 82 from the side using an appropriate tool or the like. The steel ball 50 protruding from the outer peripheral surface of the pin main body portion 34 of the fastening pin 12 is engaged with the tapered engagement surface 26 of the fastening bush 10 and the pin-side taper fitting of the fastening pin 12 is performed. The joint portion 40 and the bushing side taper fitting portion 28 of the fastening bush 10 are taper-fitted, whereby the opposing jig plate 14 and the base edge are fitted. And instrument 16, in the vertical direction and a state where the relative movement in the direction perpendicular thereto is disabled, it is possible to allowed to fastening to each other.

  Further, since the operation of the fastening device 2 can be performed from the side through the gap between the jig plate 14 and the base element 16, the fastening device 2 is independent of the position of the workpiece. The fastening operation according to the above can be performed very easily, so that the usable area of the jig plate 14 can be advantageously increased.

  Furthermore, in the illustrated fastening device 2, in particular, the base element 16 and the jig plate 14 are simply disposed in the operation hole 48 of the pin main body 34 of the fastening pin 12 in a state where the base element 16 and the jig plate 14 are fastened to each other. By simply performing a simple and easy operation to rotate the drive spindle 82, the engagement of the steel ball 50 with the tapered engagement surface 26 of the fastening bush 10 is released, and the pin-side taper fitting on the fastening pin 12 is performed. The edge of the taper fitting between the portion 40 and the bushing side taper fitting portion 28 of the fastening bush 10 can be cut, whereby the fastening pin 12 and the fastening bush 10 that are firmly fitted by the taper fitting. It is also possible to easily and reliably release the fitting state.

  In addition, in such a fastening device 2, the fastening drive wedge 70 and the detachment drive wedge 76 of the drive spindle 82 in which the head 84 is screwed with a screw provided on the inner peripheral surface of the operation hole 48. By rotating, the fastening drive wedge 70 and the detachment drive wedge 76 are surely moved and fixed in the operation hole 48 by being moved in the axial direction. The wedge mechanism constituted by the drive wedge 70, the release drive wedge 76 and the fastening / leaving passive wedge 52 also moves the fastening / leaving passive wedge 52 for projecting and housing the steel ball 50 from the pin body 34 of the fastening pin 12. The steel to be fastened, which is caused in the structure of the conventional fastening device, because it is more securely and securely fixed. The problem that the member that presses the tool 50 moves and the fastening is easily loosened can be effectively eliminated, and therefore the fitting / fixing operation between the fastening bush 10 and the fastening pin 12 can be performed more reliably. Can be done.

  Therefore, by using such an exemplary fastening device 2, the base element 16 and the jig plate 14 can be fastened easily and quickly with excellent positional accuracy. In addition to the work for releasing the engagement with the tapered engagement surface 26, the hard fitting state between the fastening pin 12 and the fastening bush 10 can be easily released without performing any special work. Thus, the fastening between the base element 16 and the jig plate 14 can be quickly released with as little effort as possible.

  In addition, as one of the desirable modes of the fastening device 2 according to the present invention, a positioning pin is erected on one surface of the flange surfaces 18 and 42 facing the fastening bush 10 and the fastening pin 12, and the other surface A fastening device in which a positioning hole into which the positioning pin is inserted can be illustrated at a corresponding position. In other words, when only one fastening device 2 is used for fixing the base element 16 and the jig plate 14, a fastening device constituted by the cylindrical fastening bush 10 and the columnar fastening pin 12. 2 such that the positioning pin and the positioning hole are formed in the fastening bush 10 and the fastening pin 12, respectively, and the positioning pin is inserted into the positioning hole. Such rotation can be effectively suppressed, and the base element 16 and the jig plate 14 can be advantageously fixed regardless of the number of fastening devices 2 used.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and it is understood that the present invention is not limited by the above description. It should be.

  For example, in the illustrated specific example, the second moving member is constituted by one member of the fastening and releasing passive wedge 52 in which the tapered pressing surface 60 and the notches 56 and 58 are integrally provided on the outer peripheral surface thereof. However, two members such as a member formed with the notches 56 and 58 constituting the fastening and detaching wedge mechanism and a clamp ring provided with the tapered pressing surface 60 are separately formed and It is also possible to combine them integrally with a bolt or the like to constitute the second moving means.

  Furthermore, in the above-described embodiment, the separation driving wedge 76 is slid in the operation hole 48 in a state where the outer peripheral surface is in direct contact with the inner peripheral surface of the operation hole 48. As shown in FIG. 6D, a sliding bush 77 may be provided on the outer peripheral surface of the separation driving wedge 76 so as to contact the inner peripheral surface of the operation hole 48 via the sliding bush 77. Is possible. Thus, by adding the sliding bush, the force required for the movement of the separation driving wedge 76 in the operation hole 48 can be reduced, so that the fitting bushing 10 and the fastening pin 12 can be fitted. The fixing operation can be quickly performed with less labor.

  Also, the first moving member is not limited to the steel ball 50 as shown in the example, and the second moving member is moved in the direction perpendicular to the axial movement of the second moving member, and is fastened. As long as it has a structure that can be partially protruded from the outer peripheral surface of the pin 12, for example, instead of the steel ball 50, a cylindrical roller or the like is adopted as the first moving member. Is also possible. Moreover, even if it is in the number, it will not be limited to three of illustrations, but will be suitably increased / decreased according to the magnitude | size of the fastening device 2 comprised, the required fastening force, etc.

  Furthermore, it goes without saying that the attachment structure of the fastening pin 12 and the fastening bush 10 to the base element 16 and the jig plate 14 is not limited to that shown in the above embodiment.

  In addition, in the above-described embodiment, the present invention is applied to a fastening device used for fastening a base element and a jig plate attached to a table of a machine tool such as a machining center to each other. Although shown, the present invention can also be advantageously applied to a fastening device used for fastening two various members to be fastened to each other other than the base element and the jig plate. Of course.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is a longitudinal section explanatory view showing an example of a fastening device according to the present invention. It is explanatory drawing which shows the fastening bush used for the fastening apparatus shown by FIG. 1, Comprising: (a) is the plane explanatory drawing, (b) is AA cross-sectional explanatory drawing in (a). is there. It is explanatory drawing which shows the pin main-body part which comprises the fastening pin used for the fastening apparatus shown by FIG. 1, Comprising: (a) is the plane explanatory drawing, (b) is front explanatory drawing. (C) is BB sectional explanatory drawing in (b). It is explanatory drawing which shows the fastening detachment | releasing passive wedge used for the fastening apparatus shown by FIG. 1, Comprising: (a) is the plane explanatory drawing, (b) is front explanatory drawing, (c) These are back surface explanatory drawings, (d) is CC sectional explanatory drawing in (b). It is explanatory drawing which shows the fastening drive wedge used for the fastening apparatus shown by FIG. 1, Comprising: (a) is the front explanatory drawing, (b) is DD sectional explanatory drawing in (a). (C) is a bottom view explanatory drawing. It is explanatory drawing which shows the detachment drive wedge used for the fastening apparatus shown by FIG. 1, Comprising: (a) is the front explanatory drawing, (b) is EE sectional explanatory drawing in (a). (C) is an explanatory plan view. Furthermore, (d) is a cross-sectional explanatory view corresponding to (b) showing a state in which a sliding bush is provided on the outer peripheral surface. It is explanatory drawing which shows the drive spindle used for the fastening apparatus shown by FIG. 1, Comprising: (a) is the front explanatory drawing, (b) is FF cross-sectional explanatory drawing in (a). . It is sectional explanatory drawing which shows the use condition of the fastening apparatus shown by FIG. 1, Comprising: (a) shows the state which inserted the fastening pin in the inner hole of a fastening bush, (b) is fastening with a fastening pin It is explanatory drawing which shows a perfect fastening state with a bush.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Fastening apparatus 10 Fastening bush 12 Fastening pin 14 Jig plate 16 Base element 18 Flange part 20 Bushing body 22 Cover member 24 Inner convex part 26 Tapered engagement surface 28 Bush side taper fitting part 30 Recess 32 Bolt 34 Pin main body Part 40 Pin side taper fitting part 44 Through hole 46 Circular through hole 48 Operation hole 50 Steel ball 52 Fastening release passive wedge 56, 58 Notch part 60 Tapered pressing surface 62, 64 Inclined surface 70 Fastening drive wedge 76 Release drive wedge 76 74, 80 Inclined surface 82 Drive spindle 90 Nut

Claims (6)

A fastening bush attached to the first member in a fixed position;
The fastening bush attached to the second member in a fixed position and having a pin main body protruding from the second member, and attached to the first member at a tip portion of the pin main body A fastening pin that is inserted into and fitted into the first and second members, thereby forming a predetermined gap between the members and realizing the fastening,
A first moving member disposed inside the distal end portion of the pin main body portion of the fastening pin so as to be movable in a direction perpendicular to the axial direction and projecting from the outer peripheral surface of the pin main body portion; ,
The fastening pin is provided so as to be movable in the axial direction within the pin body portion, and the movement in the axial direction causes the first moving member to move in a direction perpendicular to the axial direction. A second moving member protruding from the
An outer peripheral surface of the pin main body portion is provided on an inner peripheral surface of a portion of the fastening bush where the pin main body portion of the fastening pin is inserted and fitted, and the pin main body portion is inserted into the fastening bush. A disengagement preventing engaging portion that engages with the first moving member projected from the fastening bush and prevents movement of the fastening bush in a direction to disengage the pin body portion from the fastening bush;
The head portion of the fastening pin exposed in the gap between the first and second members is accommodated in an operation hole in a direction perpendicular to the axis provided to be orthogonal to the second moving member. A drive spindle which is screwed into a screw provided on the inner surface of the operation hole and can be moved in the axial direction of the operation hole.
In the operation hole, a fastening driving wedge and a separation driving wedge are arranged so as to sandwich the second moving member, and the fastening spindle of the driving spindle, the second moving member and the separation driving wedge of the driving spindle are arranged. The leg portion is inserted in the loosely fitted state, and the fastening and separating wedge mechanisms provided between the fastening driving wedge and the second moving member and between the separation driving wedge and the second moving member, respectively. The second moving member is moved in the axial direction based on the axial movement of the drive spindle, and the protrusion of the first moving member from the outer peripheral surface of the pin body portion of the fastening pin is eliminated or eliminated. An actuating mechanism configured to perform fastening or releasing between the fastening bush and the fastening pin;
The comprise configured Rutotomoni, the fastening wedge mechanism and the detachment wedge mechanism, respectively, an inclined plane of two identical tilt angle provided in correspondence to said second moving member and the fastening drive wedge engagement And the detachment drive wedge and the second moving member. The detachment inclined surface portion is composed of two inclined surfaces having the same inclination angle, and the fastening inclined surface portion and detachment. The fastening device , wherein the inclined surface portions are disposed on both sides of the leg portion of the drive spindle in the axial direction of the second moving member . The contact area of the inclined surface between the fastening driving wedge and the second moving member in the fastening inclined surface portion is between the separation driving wedge and the second moving member in the separating inclined surface portion. The fastening device according to claim 1 , wherein the fastening device is configured to be larger than a contact area of the inclined surface . A retaining nut having an outer diameter smaller than the inner diameter of the operation hole is screwed and fixed to a distal end portion of the leg portion of the driving spindle through which the fastening driving wedge, the second moving member, and the detaching driving wedge are inserted. by fastening apparatus according their engagement drive wedge and leaving the driving wedge against each other with respect to said second moving member, to claim 1 or claim 2 is ligated. The fastening driving wedge or the sliding bush is provided on the outer peripheral surface of said disengaging drive wedge, either through a sliding bush of which claims 1 to 3 is configured so as to contact the inner circumferential surface of the operation hole The fastening apparatus as described in any one. A positioning pin is erected and arranged on either one of the opposing surfaces of the fastening bush and the fastening pin, and a positioning hole is formed on the other of the opposing surfaces. The fastening device according to any one of claims 1 to 4 . The fastening device according to any one of claims 1 to 5 , wherein the first moving member is composed of at least one steel ball.

Images