JP4544969B2 - Fastening device - Google Patents

Description

  The present invention relates to a fastening device, and more particularly to an improvement of a fastening device provided with a positioning structure for positioning two members to be fastened in two directions perpendicular to each other.

  Conventionally, there are various structures of fastening devices for fastening the first and second members to be fastened to each other, and the shape and use of the member to be fastened are among them. Are appropriately selected and used. 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.

  As one type of such a fastening device, a fastening pin attached to a fixed position with respect to either one of the base element or the jig plate, and a fastening attached to a fixed position with respect to any one of them A fastening device having a fastening bush in which a pin can be inserted and fitted in the axial direction is known (for example, see Patent Document 1 below).

  In this fastening device, the fastening pin has an internal space extending in the axial direction, a moving member inserted in the internal space so as to be movable in the axial direction, and inside the side wall of the internal space in a direction perpendicular to the axis. Steel balls arranged so that they can be moved. Then, when the moving member is moved in the axial direction, which is the insertion direction of the fastening pin into the fastening bush, the steel ball is pressed and moved in the direction perpendicular to the axial direction by the moving member. Thus, the fastening pin can be partially protruded from the outer peripheral surface of the fastening pin. On the other hand, on the inner peripheral surface of the fastening bush, an engaging portion that engages with the protruding portion of the steel ball is provided.

  Thus, in the fastening device having such a structure, with respect to the protruding portion of the steel ball protruding from the outer peripheral surface of the fastening pin by the movement of the moving member under the insertion state of the fastening pin into the fastening bush, By engaging the engaging portion of the inner peripheral surface of the fastening bush, the relative movement in the axial direction of the fastening pin in the inserted state to the fastening bush is prevented, so that the base element and the jig plate Can be concluded.

  Further, in recent years, in such a fastening device, outer flange portions protruding in the direction perpendicular to the axis are provided on the outer peripheral surfaces of the fastening pin and the fastening bush, and spread in the direction perpendicular to the axis with respect to each outer flange portion. Some have a structure in which the alignment surfaces are formed, and the outer peripheral surface of the fastening pin and the inner peripheral surface of the fastening bush are each provided with a fitting tapered surface that exhibits a corresponding tapered surface shape. Has been used.

  In the fastening device having such a structure, when the fastening pins are inserted into the fastening bush, the alignment surfaces of the fastening pin and the fastening bush are brought into contact with each other, whereby the axial direction of the fastening pin and the fastening bush On the other hand, when the fitting tapered surfaces are taper fitted, positioning of the fastening pin and the fastening bushing in the direction perpendicular to the axis can be performed. As a result, the positional accuracy of the base element and the jig plate that are fastened based on the fastening between the fastening pin and the fastening bush, the holding precision of the work that is held on the jig plate via various jigs, etc. It can be increased very advantageously.

  Further, in the conventional fastening device to which such a positioning structure is added, the alignment surfaces are brought into contact with each other and the fitting tapered surfaces are brought into contact with each other by inserting the fastening pin into the fastening bush. In this state, when the moving member is moved, the steel ball is protruded from the outer peripheral surface of the fastening pin by an amount corresponding to the moving amount, and is engaged with the engaging portion of the inner peripheral surface of the fastening bush. At the same time, the fastening bush is pressed by the steel ball to the rear side in the insertion direction of the fastening pin to the fastening bush, and a greater force is applied from the steel ball to the fastening bush. At the same time, the fitting tapered surfaces can be more tightly taper-fitted.

  In other words, in the conventional fastening device, the movement of the fastening bush is prevented by moving the moving member in a state where the movement of the fastening bush is prevented based on the contact between the alignment surfaces. An operation of pressing toward the direction is performed, and the forming portion of the fitting tapered surface in the fastening pin is elastically deformed in the diameter-reducing direction by the pressing force according to the operating force for moving the moving member, or The formation part of the fitting taper surface in the fastening bush is elastically deformed in the diameter-expanding direction, the fitting taper surfaces are firmly taper-fitted together, and the steel ball is between the moving member and the engaging part, It is configured so that it can be clamped with a greater force.

  Therefore, in such a conventional fastening device, the moving operation of the moving member that requires an extremely large operating force exhibits a large operating force that can hardly be obtained by manual operation without using any tools or equipment, For example, it is easily performed by an operation mechanism using a screw mechanism that tightens or loosens a screw member using a predetermined tool such as a hydraulic mechanism, a pneumatic mechanism, or a wrench, and is fastened based on such a large operating force. The two members to be fastened can be fastened with a greater fastening force. Therefore, when a larger fastening force is required between the two members to be fastened, such as when the base element and the jig plate are fastened, it can be used very advantageously.

  On the other hand, although high positioning accuracy is required depending on the type of the two members to be fastened and the purpose of use of the two fastened members, the fastening force is stably maintained in an accurate positioning state. In some cases, it may be ensured in a size that can be obtained. In such a case, from the viewpoint of economy and workability, the moving operation of the moving member in the fastening device is performed by manual operation only by human power without using any special mechanism (equipment) or tool. It is desirable that

  However, at present, even in such a case, a conventional fastening device having a hydraulic mechanism or a pneumatic mechanism that is unnecessary for manual operation only by human power, or a screw mechanism that requires a tool is used, and two members are used. Is concluded.

JP 2001-157937 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is that the two members to be fastened have a predetermined positioning structure and are perpendicular to each other. In a fastening device that can be fastened in a state that is positioned in two directions, it is possible to reliably position the two members accurately by simple manual operation without using any special mechanism or tool. It is to provide a novel structure that can be fastened.

And in order to solve this problem, the first aspect of the present invention includes a first fastening body having a pin-like main body portion and being fixedly attached to the first member, A second fastening body having an insertion hole into which the pin-shaped main body portion of the first fastening body is inserted, and being fixedly attached to the second member to be fastened to the first member; And a first moving member that is moved to one side in the axial direction with respect to the pin-shaped main body portion of the first fastening body, and movement of the first moving member to one side in the axial direction. And a second moving member that moves in a direction perpendicular to the axial direction and partially protrudes from the outer peripheral surface of the pin-shaped main body, while the insertion of the second fastening body the inner peripheral surface of the hole, the moving member of the second, to engage under the protruding state, the insert Tapered engaging surface gradually decreasing diameter toward the rear side in the insertion direction of the pin-shaped main body portion of the inner is provided, further, with respect to the first fastener and said second fastener, An alignment surface for axially positioning the first fastening body and the second fastening body, which are brought into contact with each other in the axial direction under the insertion state of the pin-shaped main body portion into the insertion hole. Are respectively fitted to the outer peripheral surface of the pin-shaped main body portion and the inner peripheral surface of the insertion hole so that the first fastening body and the second fastening body are A fitting taper surface for positioning in a direction perpendicular to the axial direction is provided, the contact between the alignment surfaces, the taper fitting between the fitting taper surfaces, and the second moving member. wherein the engaging the tapered engagement surface, said first fastener and said second fastener with Are fastened to each other in a state where they are positioned in the axial direction and the direction perpendicular to the axial direction, and the fastening device configured to be able to realize the fastening between the first member and the second member, The second fastening body has a first part including a part for forming the insertion hole, and a second part including a mounting part to be attached to the first member and a part for forming the alignment surface. A vertical groove portion that opens between the first portion and the second portion at an end surface located on the rear side in the insertion direction of the pin-like main body portion into the insertion hole and extends in the insertion direction, and the vertical groove portion A notch groove is formed which includes a lateral groove portion extending in a direction crossing the insertion direction, and the first portion and the second portion are perpendicular to the insertion direction at the longitudinal groove portion. Divided in the direction and in the insertion direction at the transverse groove On the other hand, the second moving member is moved further in the direction perpendicular to the axis from the engagement state with the tapered engagement surface by being connected to each other at the connecting portion including the bottom portion of the lateral groove portion. When the first part is pressed by the second moving member to the rear side in the insertion direction of the pin-shaped main body into the insertion hole, the connecting part is bent and deformed. The fastening device is characterized in that the first portion can be displaced relative to the second portion on the rear side in the insertion direction .

  That is, in the first aspect of the fastening device according to the present invention, for example, the pin-shaped main body portion is inserted into the insertion hole, and the first fastening body and the second fastening body are aligned. When the surfaces are brought into contact with each other, the second portion of the second fastening body is in a state in which movement of the pin-shaped main body portion into the insertion hole toward the rear side in the insertion direction is prevented. Also, the movement of the first part to the rear side in the insertion direction can be allowed.

Therefore, in the first aspect, the tapered engagement surface provided on the inner peripheral surface of the insertion hole of the second fastening body under the axially positioned state by the contact of the alignment surfaces is the first When the second moving member protruded from the outer peripheral surface of one fastening body is pressed rearward in the insertion direction of the pin-shaped main body into the insertion hole, the insertion hole of the second fastening body is formed. The first part including the part is displaced toward the rear side in the insertion direction, so that the fitting tapered surfaces respectively provided on the outer peripheral surface of the pin-shaped main body and the inner peripheral surface of the insertion hole are reliably tapered. It can be fitted.

Therefore, according to this first embodiment, unlike the conventional fastening device, under positioned state in the axial direction of the first fastener and the second fastener, the second moving member the first The first moving member is moved so as to partially protrude from the outer peripheral surface of the fastening body, the fitting tapered surfaces are taper-fitted, and the first fastening body and the second fastening body. When the axial movement of the first fastening body and the second fastening body is prevented, an operation force large enough to elastically deform the portion where the fitting tapered surface is formed in the first fastening body and the second fastening body becomes unnecessary. Therefore, it is possible to exhibit an excellent feature that it can be easily implemented without using any special mechanism or tool.

Moreover, in the first aspect, as described above, the insertion hole provided with the fitting tapered surface on the inner peripheral surface in a state where the alignment surfaces of the first and second fastening bodies are in contact with each other. It is possible to relatively displace the first part including the forming part with respect to the second part including the alignment surface. Therefore, unlike the conventional fastening device, for example, before performing the moving operation of the first moving member in a state where the alignment surfaces of the first and second fastening bodies are in contact with each other, The fitting tapered surfaces of the second fastening body are not necessarily in contact with each other.

  Therefore, according to the first aspect of the fastening device according to the present invention, the processing accuracy of the alignment surface and the fitting tapered surface that are processed and formed with respect to the first and second fastening bodies is higher than that of the conventional device. In comparison, the characteristic that it can be advantageously relaxed is also exhibited.

In the second embodiment of the fastening device according to the present invention, the bending deformation of the connecting portion, the side walls facing each other to each other in the insertion direction of the lateral groove portion is configured to so that is brought into contact with each other The

  And, in the first aspect of the fastening device according to the present invention, by exhibiting the excellent features as described above, it is possible to perform two simple manual operations without using any special mechanism or tool. The member can be securely fastened while accurately positioning the member.

  Moreover, according to this 1st aspect, since the processing accuracy of the alignment surface and fitting taper surface with respect to a 1st and 2nd fastening body can be eased advantageously, those 1st fastening bodies and 2nd There is also an advantage that the fastening body can be easily manufactured. In addition, unlike the conventional apparatus, additional equipment such as a hydraulic mechanism and a pneumatic mechanism is not required, and accordingly, cost reduction and downsizing can be advantageously achieved.

Further, according to the first aspect of the fastening device according to the present invention, the structure that allows the displacement of the first part in the second fastening body relative to the second part, without adding any special parts or the like, It can be realized in a simple structure in which a cut groove is simply provided in the second fastening body, thereby effectively preventing the overall structure of the apparatus from becoming complicated due to the addition of such a displacement permissible structure. Can be done.

Furthermore, according to the second aspect of the fastening device according to the present invention, it is advantageously prevented that the connecting portion is excessively bent and deformed, whereby the connecting portion caused by such excessive bending deformation is prevented. Deformation and damage can also be prevented. As a result, the use durability can be effectively improved.

  Hereinafter, in order to clarify the present invention more specifically, a specific configuration of a fastening device according to the present invention will be described in detail with reference to the drawings.

  First, in FIG. 1, one embodiment of a fastening device having a structure according to the present invention is schematically shown vertically in a longitudinal section. As apparent from FIG. 1, the fastening device includes a first fastening body 10 and a second fastening body 12, and the first fastening body 10 is, for example, a predetermined table. 70 (indicated by a two-dot chain line in FIG. 1), and an article 72 (indicated by a two-dot chain line in FIG. 1) in which the second fastening body 12 is to be fixed to the table 70. It can be fixed to the position.

  More specifically, the 1st fastening body 10 which comprises this fastening device has the pin-shaped main-body part 14 which exhibits substantially cylindrical shape as a whole. And the 1st fastening body side fitting taper surface 15 is a taper surface from which the 1st fastening body side fitting taper surface 15 becomes large gradually toward the downward direction on the outer peripheral surface of the height direction intermediate part in the pin-shaped main-body part 14 of this 1st fastening body 10. It is formed with a shape.

  Further, on the outer peripheral surface of the lower end portion of the pin-shaped main body portion 14, there are integrally mounted mounting portions 16 that take the form of outer flanges extending in the direction perpendicular to the axis (horizontal direction) from two locations facing each other in the radial direction. Is formed. Each of these attachment portions 16 has a substantially rectangular plate shape as a whole, and its lower surface is a contact surface 18 formed of a flat horizontal surface. Further, in the intermediate portion in the length direction of the mounting portion 16, a mounting bolt 20 for mounting the first fastening body 10 to the table 70 in a fixed position is provided with a leg portion provided with a male screw. The insertion position is made to protrude downward from the contact surface 18. And in this attaching part 16, on the upper surface of the base side part opposite to the front end side of the extension direction from the pin-shaped main-body part 14, the 1st which consists of a flat horizontal surface made one step higher than another part. A fastening body side alignment surface 22 is provided.

  Further, the pin-like main body 14 integrally formed with such attachment parts 16, 16 has an inner space 24 that extends in the axial direction on the same axis in the center, and has both upper and lower ends of the pin-like main body 14. It is formed with a through-hole shape opening in the surface. The internal space 24 has an inner peripheral surface having a stepped cylindrical surface shape, and the upper part is a small diameter part 26 having the smallest inner diameter, and the intermediate part is more than the small diameter part 26. The middle diameter portion 28 has a large inner diameter, and the lower portion is a large diameter portion 30 having the largest inner diameter.

  In the large-diameter portion 30 of the internal space 24, a female screw ring 32 having an annular plate shape and having a central hole formed as a female screw hole 31 in which a female screw is formed on the inner peripheral surface becomes non-rotatable. The stopper ring 34 accommodated and fixed in the large-diameter portion 30 is coaxially positioned in a state in which separation from the large-diameter portion 30 is prevented.

  Further, at two locations facing the radial direction in the peripheral wall of the inner diameter portion 28 of the inner space 24, the peripheral wall extends in a direction perpendicular to the axial direction of the pin-shaped main body portion 14, and the peripheral wall extends in the thickness direction. One circular through hole 36 is provided, each having an opening that opens on the outer peripheral surface of the pin-shaped main body 14 and the inner peripheral surface of the internal space 24. Here, in the peripheral wall of the pin-shaped main body portion 14, a circular through hole 36 is provided in a portion on the upper side of the portion where the first fastening body-side fitting tapered surface 15 is formed. The opening of the circular through hole 36 on the outer peripheral surface side of the main body 14 is formed on the upper side of the site where the first fastening body side fitting tapered surface 15 is formed.

In each circular through hole 36, a steel ball (steel ball) 38 as a second moving member having an outer diameter smaller than that by a predetermined dimension is placed in each circular through hole 36. One each is arranged so as to be movable in a direction perpendicular to the axial direction of the pin-shaped main body portion 14 in the extending direction. Here, the diameter of the steel ball 38 is made larger than the thickness of the peripheral wall of the pin-shaped main body portion 14 in which the circular through hole 36 is formed. It is positioned in the circular through hole 36 in a state of protruding into the medium diameter portion 28 of the void 24.

Further, a clamp rod 40 as a first moving member is inserted and disposed in the internal space 24 of the pin-shaped main body 14. The clamp rod 40 as a whole has a stepped cylindrical shape having a height higher than that of the pin-shaped main body 14. And the upper part exhibits a cylindrical shape having an outer diameter slightly smaller than the small-diameter part 30 of the internal cavity 24 and a height sufficiently higher than the small-diameter part 30, and knurled on the outer peripheral surface of the tip part. It is set as the knob | pick part 42 to which is given. Further, the lower part of the clamp rod 40 is a male screw portion 44 in which a male screw is engraved on the outer peripheral surface. Further, the intermediate portion has a cylindrical shape having an outer diameter slightly smaller than the inner diameter portion 28 of the inner space 24, and has a tapered surface whose diameter increases downward on the outer peripheral surface of the upper portion thereof. A pressing surface 46 is formed.

  Then, such a clamp rod 40 projects the knurled portion of the knob portion 42 upward from the interior space 24 of the pin-shaped main body portion 14, and enters the interior space 24 in the axial direction. It is inserted to be movable. Further, under such an inserted state, the male screw portion 44 is screwed into the female screw hole 31 of the female screw ring 32 fixed in the large-diameter portion 30 of the internal space 24, and the pressing surface 46 is connected to each circular through hole. The steel ball 38 disposed in 36 is positioned in contact with the protruding portion into the inner diameter portion 28 of the inner space 24 in the steel ball 38.

  Thus, in the first fastening body 10, the mounting bolts 20, 20 are brought into contact with the upper surface of the predetermined table 70 at the contact surface 18 of the mounting portions 16, 16. It can be attached to a fixed position. Then, under such an attachment state to the table 70, the first fastening body side alignment surface 22 is positioned parallel to the upper surface of the table 70 (see FIG. 2).

  Further, in the first fastening body 10, the clamp rod 40 is clamped in the direction in which the knob 42 of the clamp rod 40 is picked by fingers and the male screw 44 is loosely engaged with the female screw hole 31 of the female screw ring 32. When the rotation operation is performed, the entire clamp rod 40 is moved upward by the screw feeding action of the male screw portion 44 and the female screw hole 31. As the clamp rod 40 moves upward, the steel ball 38 disposed in each circular through hole 36 is moved in the axial direction of the pin-shaped main body 14 at the pressing surface 46 of the clamp rod 40. Is pressed in a direction perpendicular to the circular through hole 36 so that the circular through hole 36 is moved toward the outer peripheral surface side opening of the pin-shaped main body 14 in the circular through hole 36 ( (See FIG. 3).

  On the other hand, the 2nd fastening body 12 which comprises a fastening device with the 1st fastening body 10 made into such a structure has the thick flat plate thru | or block form which exhibits a longitudinal rectangular shape as a whole. An insertion hole 48 is formed in a middle portion in the length direction (left and right direction in FIG. 1) in the form of a through hole that opens at both upper and lower end surfaces of the second fastening body 12.

  This insertion hole 48 has a substantially stepped cylindrical surface-shaped inner peripheral surface in which the upper portion has a larger diameter than the lower portion, and the inner diameter of the lower small-diameter inner peripheral surface portion is the first inner diameter surface. The fastening body 10 has a predetermined dimension larger than the outer diameter of the pin-shaped main body 14. A tapered engagement surface as an engagement portion that exhibits a tapered surface shape that gradually becomes smaller in diameter between the lower small-diameter inner peripheral surface portion and the upper large-diameter inner peripheral surface portion. 50 is formed to connect and extend the upper large-diameter inner peripheral surface portion and the lower small-diameter inner peripheral surface portion.

  Further, in the lower small-diameter inner peripheral surface portion of the insertion hole 48, a substantially half portion on the lower side is a second fastening body-side fitting tapered surface 52 that gradually becomes larger in diameter downward. In addition, this 2nd fastening body side fitting taper surface 52 has the same taper angle as the 1st fastening body side fitting taper surface 15 provided in the pin-shaped main-body part 14 of said 1st fastening body 10. FIG. Thus, a tapered surface shape corresponding to the first fastening body side fitting tapered surface 52 is formed.

  Further, the second fastening body side alignment surface 54 formed of a flat horizontal surface raised one step higher than the bottom face of the intermediate portion where the insertion hole 48 is formed on the lower surface of both ends in the length direction of the second fastening body 12. Are provided respectively. Further, at both end portions provided with such alignment surfaces 54, there are respectively one bolt hole 56 extending through each end portion in the width direction (direction perpendicular to the paper surface in FIG. 1). It is provided one by one. And the 2nd fastening body 12 is bolt-fixed with respect to a predetermined | prescribed article | item with the attachment bolt penetrated in these bolt holes 56 (refer FIG. 2). That is, here, in the second fastening body 12, the formation site of the bolt hole 56 is an attachment site to the article 72.

  In the present embodiment, in particular, in the second fastening body 12, the intermediate portion where the insertion hole 48 is formed, and both longitudinal ends on which the second fastening body side alignment surface 54 and the bolt hole 56 are formed. One incision groove 58 is provided between each part. These two cut grooves 58 are formed over the entire width in the portions located on both the left and right sides of the insertion hole 48 in the lower surface portion sandwiched between the two second fastening body side alignment surfaces 54, 54. It has an arc shape of approximately ¼ circumference with an opening that opens downward and a relatively narrow groove width. And each bolt hole 56 provided in the both ends is extended so as to surround only about a half circumference, and is positioned symmetrically with the insertion hole 48 in between with a form penetrating in the width direction. .

  Further, in the cut groove 58, the substantially half portion on the opening side, that is, the lower side is the vertical groove portion 60 extending in a curved shape in the vertical direction, while the substantially half portion on the upper side is the first half portion. The lateral groove 62 extends in the left-right direction, which is the length direction of the second fastening body 12.

  Thereby, in this embodiment, the intermediate part of the 2nd fastening body 12 in which the insertion hole 48 is formed is the 2nd fastening body side alignment surface 54 in each vertical groove part 60 of the two notch grooves 58 and 58. FIG. In other words, the intermediate portion of the second fastening body 12 includes a portion where the insertion hole 48 is formed. On the other hand, both side end portions are second portions 66 a and 66 b including a portion where the alignment surface 54 is formed and a portion where the article 72 is attached. In addition, the first part 64 and the second parts 66a and 66b are positioned above the bottom part of each cut groove 58 and the lateral groove part 62 of each cut groove 58, and are arranged in the length direction. They are connected to each other by a thin connecting portion 68 composed of extending portions.

Thus, in the second fastening body 12, when the first portion 64 is pressed downward with the second portions 66 a and 66 b being fixed in position, the thin coupling is caused by the pressing force. The portion 68 is bent and deformed, and based on this, the first portion 64 is relatively displaced downward with respect to the second portions 66a and 66b. At this time, when the deformation of the connecting portion 68 becomes large to some extent, among the side walls of the lateral groove portion 62 of each cut groove 58 , the side walls facing each other in the vertical direction come into contact with each other. After that, the contact between the side walls prevents further deformation of the connecting portion 68 and further relative displacement of the first portion 64 below the second portions 66a and 66b based on the deformation. (See FIG. 3).

  Thus, using the fastening device of this embodiment having the second fastening body 12 and the first fastening body 10 structured as described above, the predetermined article 72 is fastened to the table 70. For example, the operation is performed in the following manner.

That is, first, as shown by a two-dot chain line in FIG. 1, the first fastening body 10 is bolted to the table 70 with mounting bolts 20 and 20, while the second fastening body 12 is fixed to the table. The article 72 to be fastened to 70 is bolted with a mounting bolt (not shown). In this state, the second fastening body 12 is positioned coaxially above the first fastening body 10 with a predetermined distance therebetween.

  At this time, the male threaded portion 44 of the clamp rod 40 is sufficiently screwed into the female threaded hole 31 of the female threaded ring 32 so that the pressing surface 46 of the clamp rod 40 is positioned as low as possible. It is necessary to prevent the steel ball 38 from protruding from the outer peripheral surface of the pin-shaped main body 14 in the first fastening body 10.

  Next, as shown in FIG. 2, the pin-shaped main body portion 14 above the attachment portions 16, 16 of the first fastening body 10 is inserted into the insertion hole 48 of the second fastening body 12. At this time, between the first fastening body 10 and the second fastening body 12, the first fastening body side alignment surface 22 and the second fastening body side alignment surface 54 are brought into contact with each other. Thereby, the downward movement of the second portions 66a and 66b of the second fastening body 12 is prevented, and the first fastening body 10 and the second fastening body 12, and further the table on which they are fixedly mounted. 70 and the article 72 are positioned in the vertical direction. Moreover, the 1st fastening body side fitting taper surface 15 and the 2nd fastening body side fitting taper surface 52 are made into the state which opened the slight clearance gap, or was made to oppose. In FIGS. 2 and 3, reference numeral 74 denotes a mounting bolt.

  After that, any tool in the direction in which the knob 42 of the clamp rod 40 in the first fastening body 10 is picked with fingers and the male screw 44 is screwed out (relaxed) from the female screw hole 31 of the female screw ring 32. The clamp rod 40 is moved upward without being rotated manually.

  As the clamp rod 40 moves upward as shown in FIG. 3, the steel balls 38 disposed in the circular through holes 36 are pressed by the pressing surface 46 of the clamp rod 40. As a result, the inside of each circular through hole 36 is moved outward in the radial direction of the pin-shaped main body 14 and gradually protrudes from the outer peripheral surface of the pin-shaped main body 14 to the side by an amount corresponding to the amount of movement. It is done. As a result, the protruding portion of each steel ball 38 is engaged with a tapered engagement surface 50 provided on the inner peripheral surface of the insertion hole 48 in the second fastening body 12.

  Further, subsequently, each steel ball 38 is further moved under the state of engagement of each steel ball 38 with the tapered engagement surface 50, whereby each steel ball from the outer peripheral surface of the first fastening body 10. The protrusion amount of the steel ball 38 is increased, and the tapered engagement surface 50 is pressed downward at the protrusion portion of each steel ball 38 as the protrusion amount increases.

  At this time, the contact of the first fastening body side alignment surface 22 and the second fastening body side alignment surface 54 prevents the second portions 66a and 66b of the second fastening body 12 from moving downward. Therefore, the second portion 66a, 66b is connected to the first portion 64 of the second fastening body 12 including the forming portion of the insertion hole 48 in which the tapered engagement surface 50 is provided on the inner peripheral surface. The portion 68 is bent and deformed downward, and the first portion 64 is relatively displaced downward with respect to the second portions 66a and 66b.

  Thereby, the first fastening body side fitting tapered surface 15 and the second fastening body side fitting tapered surface 52 are taper fitted to each other, and each steel ball 38 is pressed against the pressing surface of the first fastening body 10. Between 46 and the taper-shaped engagement surface 50 of the second fastening body 12, the pressure is firmly held. As a result, the first fastening body 10 and the second fastening body 12, and the table 70 and the article 72 to which they are fixed in position are positioned in the left-right direction (horizontal direction), and the insertion hole 48 is also positioned. Detachment of the pin-shaped main body portion 14 from the rim is prevented.

  Thus, the first fastening body 10 and the second fastening body 12 are in the axial direction of the pin-shaped main body portion 14, that is, the vertical direction that is the insertion direction of the pin-shaped main body portion 14 into the insertion hole 48. The table 70 and the article 72 are fastened to each other in a state where they are positioned in the left-right direction (horizontal direction) which is a direction perpendicular to the direction.

  In the fastening operation between the first fastening body 10 and the second fastening body 12, the first fastening body 10 and the second fastening body 12 are operated based on the pressing force applied to the tapered engagement surface 50 from the protruding portion of each steel ball 38. When the first portion 64 of the second fastening body 12 is pressed downward and the connecting portion 68 is bent and deformed downward, the side wall portions facing each other in the vertical direction in the lateral groove portion 62 of each cut groove 58 Due to this contact, excessive bending deformation of the connecting portion 68 is prevented. Therefore, the permanent deformation or damage of the connecting portion 68 due to such excessive bending deformation can be effectively prevented.

  Further, in the fastening state of the first fastening body 10 and the second fastening body 12 as described above, unless the screwing position of the male screw portion 44 of the clamp rod 40 with respect to the female screw hole 31 of the female screw ring 32 is changed, The firm clamping state of each steel ball 38 between the pressing surface 46 of the clamp rod 40 and the tapered engagement surface 50 of the second fastening body 12 is maintained, so that the first fastening body 10 and the second fastening body 10 The fastening state of the fastening body 12 and the table 70 and the article 72 are stably maintained.

  When the male screw portion 44 is screwed again into the female screw hole 31 of the female screw ring 32 by manual rotation operation with respect to the clamp rod 40 from such a fastening state, the pressing surface 46 of the clamp rod 40 and the second surface The tight clamping state of each steel ball 38 with the tapered engagement surface 50 of the fastening body 12 is eliminated, and the pin-shaped main body portion 14 can be detached from the insertion hole 48. The fastening between the one fastening body 10 and the second fastening body 12, and the table 70 and the article 72 is eliminated.

  As described above, in the fastening device of the present embodiment, the pin-shaped main body portion 14 of the first fastening body 10 fixed to the table 70 is inserted into the insertion hole of the second fastening body 12 fixed to the article 72. And inserted into the internal space 24 of the pin-shaped main body 14 under the condition that the first fastening body side alignment surface 22 and the second fastening body side alignment surface 54 are in contact with each other. The first fastening body 10 and the second fastening body 12 as well as the table 70 and the article 72 can be easily and quickly moved by simply picking the gripping portion 42 of the clamp rod 40 and rotating it. Can be fastened to.

  Therefore, if the fastening device of this embodiment is used, the table 70 and the article 72 can be fastened efficiently and reliably while being positioned accurately by a simple manual operation.

  In the present embodiment, as described above, the pin-like main body portion 14 is inserted into the insertion hole 48 so that the first fastening body side alignment surface 22 and the second fastening body side alignment surface 54 are brought into contact with each other. Even when a minute gap is formed between the first fastening body side fitting tapered surface 15 and the second fastening body side fitting tapered surface 52 when they are brought into contact with each other, The first fastening body side and the second fastening body side fitting tapered surfaces 15 and 52 are surely taper-fitted. Therefore, it is not necessary to form the alignment surfaces 22 and 54 and the fitting tapered surfaces 15 and 52 with strict processing accuracy with respect to the first fastening body 10 and the second fastening body 12, thereby The advantage that manufacture of these 1st and 2nd fastening bodies 10 and 12 becomes easy will be acquired.

  Moreover, in the fastening device of the present embodiment, the clamp rod 40 is rotated by a manual operation without using any tool, whereby the first fastening body 10 and the second fastening body 12 are fastened. Therefore, unlike conventional devices, no additional equipment such as a hydraulic mechanism or a pneumatic mechanism is required, and the cost and size can be advantageously reduced by that amount. .

  Further, in such a fastening device, the relative displacement of the first part 64 downward relative to the second parts 66a and 66b is extremely simple and extra in that the cut grooves 58 and 58 are provided in the second fastening body 12. Since it is realized in a simple structure that does not use parts, the complexity of the structure of the entire apparatus accompanying the addition of a structure that enables the relative displacement of the first part 64 relative to the second parts 66a and 66b is advantageous. Can be prevented.

Further, in the present embodiment, by the contact of the side wall portions facing each other of the lateral groove 62 of the notches 58, 58 are excessive flexural deformation of such connecting portion 68 is prevented by such excessive flexural deformation Since the permanent deformation and damage generation of the connecting portion 68 can be effectively prevented, excellent usability can be stably maintained over a longer period.

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

  For example, the first moving member is moved in a direction perpendicular to the axial movement of the second moving member, and partially from the outer peripheral surface of the pin-shaped main body portion of the first fastening body. What is necessary is just to have a structure which can be made to project. Therefore, it is of course possible to employ, for example, a cylindrical roller or the like as the first moving member instead of the illustrated steel ball 38.

  In addition, as a mechanism for moving the second moving member in the axial direction, a mechanism having a structure other than the screw mechanism may be appropriately employed as long as it can be manually operated.

  In addition, the present invention can be advantageously applied to a fastening device that is used to fasten two various members to be fastened to each other, other than the table and article combination illustrated. 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 one embodiment of a fastening device according to the present invention. It is a figure for demonstrating an example of the use condition of the fastening apparatus shown by FIG. 1, Comprising: The pin-shaped main-body part of the 1st fastening body attached to the 1st member is attached to a 2nd member. The state inserted into the insertion hole of the second fastening body is shown. It is a figure for demonstrating the other example of the use condition of the fastening apparatus shown by FIG. 1, Comprising: The state which fastened the 1st fastening body and the 2nd fastening body completely is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st fastening body 12 2nd fastening body 14 Pin-shaped main-body part 15 1st fastening body side fitting taper surface 22 1st fastening body side alignment surface 24 Internal space 38 Steel ball 40 Clamp rod 48 Insertion hole 50 Tapered engagement surface 52 Second fastening body side fitting tapered surface 54 Second fastening body side alignment surface 58 Cut groove 60 Vertical groove portion 62 Horizontal groove portion 64 First portion 66 Second portion 68 Connection portion

Claims (2)

A first fastening body having a pin-shaped main body portion and fixedly attached to the first member, and an insertion hole into which the pin-shaped main body portion of the first fastening body is inserted, And a second fastening body fixedly attached to the second member to be fastened to the first member,
A first moving member that is moved to one side in the axial direction with respect to the pin-shaped main body portion of the first fastening body, and the axial direction by movement of the first moving member to one side in the axial direction And a second moving member that moves in a direction perpendicular to the pin and protrudes partially from the outer peripheral surface of the pin-shaped main body, while the inner periphery of the insertion hole of the second fastening body A taper-shaped engagement that gradually becomes smaller in diameter toward the rear side in the insertion direction of the pin-shaped main body portion into the insertion hole, which is engaged with the second moving member in the protruding state with respect to the surface. A surface is provided,
Further, the first fastening body and the second fastening body are brought into contact with each other in the axial direction under the insertion state of the pin-shaped main body portion into the insertion hole, and the first fastening body and the second fastening body are in contact with each other. A positioning surface for positioning the fastening body and the second fastening body in the axial direction is provided, and the outer peripheral surface of the pin-shaped main body and the inner peripheral surface of the insertion hole are tapered to each other. And fitting taper surfaces for positioning in a direction perpendicular to the axial direction of the first fastening body and the second fastening body, respectively,
Due to the contact between the alignment surfaces, the taper fitting between the fitting tapered surfaces, and the engagement between the second moving member and the tapered engagement surface , The second fastening body is configured to be fastened to each other in a state where the second fastening body is positioned in the axial direction and the direction perpendicular to the axial direction, so that the fastening between the first member and the second member can be realized. In the fastening device
The second fastening body has a first part including a part for forming the insertion hole, and a second part including a mounting part to be attached to the first member and a part for forming the alignment surface. A vertical groove portion that opens between the first portion and the second portion at an end surface located on the rear side in the insertion direction of the pin-like main body portion into the insertion hole and extends in the insertion direction, and the vertical groove portion A notch groove is formed which includes a lateral groove portion extending in a direction crossing the insertion direction, and the first portion and the second portion are perpendicular to the insertion direction at the longitudinal groove portion. The second moving member is tapered, and the second moving member is connected to each other at a connecting portion including a bottom portion of the transverse groove. The first surface when moved further in the direction perpendicular to the axis from the state of engagement with the engagement surface. When the second moving member is pressed to the rear side in the insertion direction of the pin-shaped main body into the insertion hole, the connecting portion is bent and deformed, and the first portion is The fastening device is configured to be relatively displaced with respect to the second portion toward the rear side in the insertion direction . The bending deformation of the connecting portion, said contact each other side walls facing each other to each other in the insertion direction of the lateral groove, to so that the further bending deformation of the connecting portion from contact with their side walls to each other prevents The fastening device according to claim 1.

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