JP2009028825A - Positioning clamp element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp element for fixing and holding a prescribed object on a base plate inexpensively by a simple structure, and to facilitate the working of the base plate and enhance the usability of the clamp element. <P>SOLUTION: The clamp element 10 is configured to include a cylindrical element body 12 with at least a lower part stored in a mounting hole formed at the base plate, a mounting flange 14 integrally provided at an outer peripheral part of the element body 12 with a prescribed thickness and extending outward perpendicularly to the axis and provided with a bolt hole 32 for fixing the element to the base plate with a bolt, and a leading bolt 16 housed in a cylinder of the element body 12, projecting axially outward from the upper end of the element body 12 to be screwed into a fixing screw hole formed at an object to be clamped, having a male screw formed on the outer peripheral face of the bolt, and regulated in projecting amount. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a positioning clamp element, and more particularly, to a clamp element for effectively fixing and holding an object such as a workpiece or a jig to be subjected to predetermined processing on a predetermined base plate.

  Conventionally, in order to position an object such as a workpiece (workpiece) or a jig on a predetermined base plate, a fitting type positioning structure using a pin and a hole has been generally adopted. Various clamps have been used for fixing jigs and the like (see Patent Document 1). In the method using pins, complete fixing of workpieces and jigs is essential. In the case of a clamp that holds the workpiece or jig from above or clamps them completely to fix them completely, it may interfere with the machining work or There are problems such as interference, and there are cases where the application location is limited.

  Further, in Patent Document 2, in order to fix and hold a predetermined jig plate on a predetermined base plate, it has a fastening pin and a fastening bush that can be inserted and fitted in the axial direction. A fastening device has been clarified, but in such a fastening device, in addition to the problem that the structure is complicated and therefore expensive, in fixing a workpiece to which a predetermined processing is applied. In the processing work, there is a problem that the fastening device itself becomes an obstacle.

  Furthermore, in the market, a clamp member called “WDS Pull-Down Insert” is also commercially available. However, as shown in Non-Patent Document 1, such a clamp member has a cylindrical shape. The base plate fixing screw provided on the outer peripheral surface of the clamp body is fixed to the base plate by screwing it into the screw hole of the base plate. On the other hand, the workpiece is protruded from the cylinder of the clamp body. When the fixing screw is screwed into a mounting screw hole provided in a predetermined workpiece, the workpiece is fixed and held on the base plate.

  For this reason, the base plate fixing screw and the workpiece fixing screw provided on the outer peripheral surface of the clamp body are opposite to each other in order to avoid the problem of loosening when they are screwed into the corresponding screw holes and tightened. The screw hole of the base plate is generally provided in the left-hand screw structure, and it is necessary to have a screw structure, and for that purpose, such a clamp body is screwed into a base plate fixing screw provided on the outer peripheral surface thereof. However, it is necessary for a person using such a clamp member to provide a screw hole of a large-diameter left-handed screw structure corresponding to the large diameter of the outer peripheral surface of the clamp body in the base plate. On the other hand, a very troublesome work is required, and a special threading tool is required for that purpose.

JP 2007-90446 A JP-A-8-170607 UK: WDS Limited website http://www.wdsltd.co.uk/sp/6.pdf

  Here, the present invention has been made in the background of such circumstances, the problem to be solved is a clamp element for fixing and holding a predetermined article on a base plate in a simple structure, The object is to provide it at a low cost, and to facilitate the processing of the base plate to enhance the usability of the clamp element.

  In the present invention, in order to solve such a problem, a clamping element for fixing and holding a predetermined article on a predetermined base plate is used, and at least a lower portion is provided in a mounting hole provided in the base plate. A cylindrical element body housed in the body and a bolt hole for fixing the bolt to the base plate are integrally provided on the outer periphery of the element body so as to extend outward in a direction perpendicular to the axis with a predetermined thickness. And a mounting flange portion provided in the element main body and projecting outward in the axial direction from the upper end portion of the element main body for screwing into a fixing screw hole provided in the article. A positioning clan having a pull-in bolt having a male screw formed on an outer peripheral surface thereof, wherein the protruding amount is regulated The element is intended to its gist.

  In one of desirable aspects of the positioning clamp element according to the present invention, the element main body is integrally formed with a positioning cylinder portion projecting a predetermined height axially outward from the upper surface of the mounting flange portion. The positioning cylinder portion is fitted in a positioning hole provided in the article.

  In the present invention, advantageously, the bolt hole provided in the mounting flange portion penetrates the large-diameter head receiving hole for receiving the bolt head and the bottom of the head receiving hole. And a small-diameter leg portion insertion hole through which the bolt leg portion is inserted.

  Further, according to another preferred embodiment of the positioning clamp element according to the present invention, the biasing force of the element body so as to project the pull-in bolt axially outward from the upper end portion of the element body. A configuration having a means and holding means for holding the pull-in bolt in the cylinder of the element body against the urging force of the urging means is advantageously employed.

  In addition, in the present invention, preferably, the mounting flange portion is placed on the base plate, and the article is fixed on the base plate at a height corresponding to the thickness of the mounting flange portion. It will be held.

  In such a positioning clamp element according to the present invention, the cylindrical element body is attached to the base plate in a bolt fixing structure by a mounting flange portion integrally provided on the outer peripheral portion of the cylindrical element body. The structure of the clamp element is constructed so that the pull-in bolt accommodated in the main body is protruded and fixed to the base plate by holding the article on the base plate by attaching to the predetermined article. As a result, it becomes extremely simple, and this makes it possible to manufacture the element at a low cost, and it is possible to more securely fix and hold the article on the base plate. By accurately finishing the thickness of the integral mounting flange, the product can be And accurately positioned on the plate, a fixed, that is to become possible allowed to hold.

  Moreover, in such a positioning clamp element according to the present invention, it is not necessary to provide a screw in the direction opposite to the pull-in bolt on the outer periphery of the cylindrical element body, and in the mounting flange portion integral with the element body, Since the bolt can be fixed to the base plate, the bolt hole provided in the base plate does not need to have a reverse screw structure, and can have a screw structure in the same direction as the pull-in bolt. For this reason, the bolt hole machining operation on the base plate becomes extremely easy, and no special threading tool is required, so the usability of the clamping element according to the present invention can be remarkably improved. Thus, the fixing and holding of the article with respect to the base plate can be performed more easily.

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

  First, FIG. 1 shows an example of a positioning clamp element according to the present invention in a frontal form and a planar form, and FIG. 2 shows the longitudinal cross-sectional form of such a clamp element at different positions of the pull-in bolt. It is shown in the state of being placed in the position. In these drawings, the clamp element 10 is provided integrally with a cylindrical metal element body 12 accommodated in a mounting hole provided at least in the lower part of the base plate, and an outer peripheral portion of the element body 12. The mounting flange portion 14 having a predetermined thickness and the metal pull-in bolt 16 accommodated in the cylinder of the element body 12 are configured.

  2, the element body 12 is provided with a stepped portion 18 on the inner surface of a cylindrical tube, and the upper portion of the element main body 12 is a small diameter inner surface 20. The lower part is a large-diameter inner surface 22. And, as will be described later, the pull-in bolt 16 accommodated in the cylinder of the element body 12 abuts on the stepped portion 18 so that the protruding amount to the outside (upward) can be regulated. In addition, a coil spring 24 serving as a biasing means is accommodated in the cylinder that gives the large-diameter inner surface 22 so that the pull-in bolt 16 protrudes axially outward from the upper end of the element body 12. is doing. Further, a ring-shaped closing sleeve 26 is fixed to the lower end opening portion of the large-diameter inner surface 22 of the element body 12 by bonding or the like, and functions as a lower spring seat of the coil spring 24. Further, as shown in FIG. 2B, the screw portion 28 provided on the inner surface of the closing sleeve 26 is screwed with the screw portion on the lower outer peripheral surface of the lead-in bolt 16 so that the pull-in is performed. The bolt 16 can be held in the cylinder of the element body 12.

  Further, as shown in FIGS. 1 and 2, the element main body 12 has a positioning cylinder portion 30 that protrudes from the upper surface of the mounting flange portion 14 to a predetermined height outward in the axial direction. As will be described later, the positioning cylinder portion 30 is fitted in a positioning hole provided in a predetermined article, whereby the article in the horizontal direction (left and right in FIG. 1 (a) and FIG. 2). In-plane positioning of the article in two perpendicular directions (XY directions) can be effectively realized. Note that, for such positioning in the XY directions, the outer peripheral surface of the positioning cylinder portion 30 and the outer peripheral surface of the element body 12 attached to the base plate are processed with high accuracy.

  Furthermore, the mounting flange portion 14 integrated with the element body 12 provided so as to be positioned at the upper part of the outer peripheral portion of the element body 12 extends outward in the direction perpendicular to the axis with a predetermined thickness for a predetermined length. Then, four bolt holes 32 are disposed around the element body 12 with a 90 ° phase difference, as is apparent from FIG. 1B, so as to penetrate through in the thickness direction. . As is apparent from FIG. 2, the bolt hole 32 provided in the mounting flange portion 14 penetrates the large-diameter head receiving hole 32a for receiving the bolt head and the bottom of the head receiving hole 32a. And a small-diameter leg insertion hole 32b through which the bolt leg can be inserted. Note that the upper and lower surfaces (surfaces in the vertical direction in FIG. 2) of the mounting flange portion 14 are processed with high accuracy, and the accuracy of the thickness is adjusted. When fixed and held, accurate positioning in the Z direction (vertical direction in FIG. 2) can be effectively realized.

  Further, as is apparent from FIG. 2, the pull-in bolt 16 integrally has a locking flange portion 34 so as to be located slightly below the axial central portion. The locking flange portion 34 is urged upward by the urging force of the coil spring 24 and comes into contact with the stepped portion 18 provided in the cylinder of the element body 12, so that upward movement is restricted. Thus, as shown in FIG. 2A, the upward protrusion amount of the pull-in bolt 16 is restricted. Further, as will be described later, the outer peripheral surface above the locking flange portion 34 is a male for fixing and holding such an article by screwing into a fixing screw hole provided in a predetermined article. A screw 36 is provided and can be screwed into a fixing screw hole in a predetermined article at a portion protruding above the male screw 36. Further, the lower surface of the locking flange portion 34 is a spring seat at the upper end of the coil spring 24, and the urging force of the coil spring 24 is further provided at a screw portion provided on the outer peripheral surface below the locking flange portion 34. 2B, the screw bolt 28 is screwed into the threaded portion 28 on the inner peripheral surface of the closing sleeve 26 as shown in FIG. 2 (b). It can be held in the cylinder of the main body 12.

  The pull-in bolt 16 is provided with a hexagonal hole 38 in the axial direction so as to open to the upper end surface thereof, and a hexagonal wrench is engaged in the hexagonal hole 38 and rotated around the axis. Further, the screwing to the closing sleeve 26 and the screwing to the fixing screw hole provided in the article as described later can be easily performed.

  By the way, the clamp element 10 having such a structure can effectively fix and hold a predetermined article on a predetermined base plate as shown in FIGS. 3 to 5, for example. is there.

  That is, for example, as shown in FIG. 3, the clamp element 10 is provided at a predetermined plurality of locations (here, 4 locations at each corner) of the base plate 40 that has been accurately measured in thickness dimensions, respectively. The four bolts 42 can be bolted. There, the lower part of the element body 16 of the clamp element 10 is fitted into a mounting hole 44 provided in the base plate 40, and the mounting flange portion 14 is disposed in a state of being placed on the base plate 40. In addition, the pull-in bolt 16 is projected from the mounting flange portion 14. In addition, the bolt hole 46 for fixing the base plate 40 to the base under it is provided so that it may be located in the intermediate part in which the clamp element 10 is arrange | positioned. Here, the inner surface of the mounting hole 44 is processed with high accuracy together with the surface of the base plate 40 to obtain the accuracy.

  4 shows a vise device 50 as an article fixed and held on the base plate 40 shown in FIG. There, the vise device 50 is composed of a mounting plate 52 and a vise body 54 fixed on the mounting plate 52, and on the mounting plate 52, the four clamping elements 10 are disposed on the base plate 40. Four fixing holes 56 are provided through the mounting plate 52 in the vertical direction in the corresponding portions. As is clear from FIG. 4B, the fixing hole 56 is provided with a positioning hole 58 so as to enter a predetermined length from the lower surface of the mounting plate 52, and further from the positioning hole 58. Also, a screw hole 60 for fixing is provided in a portion that enters inward. Here, the positioning hole 58 has a length in the axial direction that is equal to or greater than the axial length of the positioning cylinder portion 30 from which the positioning cylinder portion 30 of the clamp element 10 attached to the base plate 40 is fitted. The fixing screw hole 60 is provided in the axial direction in which the male screw 36 of the pull-in bolt 16 protruding above the clamp element 10 is screwed to sufficiently fix and hold the vise 50. The length is provided in the fixing hole 56.

  In order to fix and hold the vise device 50 shown in FIG. 4 on the base plate 40 having the clamp elements 10 arranged at the four corners shown in FIG. 3, for example, as shown in FIG. The positioning cylinder portion 30 of the clamp element 10 is fitted into the fixing holes 56 provided at the four corners of the mounting plate 52 of the force device 50 and is fitted into the positioning hole 58, while the fixing screw hole 60 is fitted. On the other hand, the male screw 36 of the pull-in bolt 16 protruding from the clamp element 10 is screwed together, so that the vise device 50 is fixed and held on the base plate 40. The male screw 36 of the pull-in bolt 16 and the fixing screw hole 60 are screwed together with a hexagonal hole that opens a tool such as a hexagon wrench that can be inserted into the fixing hole 56 from above into the upper end surface of the pull-in bolt 16. And can be easily performed by applying a rotational action to the pull-in bolt 16.

  As described above, the vise 50 for clamping the workpiece W to be processed includes the element body 12, the mounting flange portion 14, and the pull-in bolt 16 via the mounting plate 52, and the clamp element 10 having a simple structure. Thus, it is possible to effectively fix and hold the base plate 40 on the base plate 40 with a simple operation, and the structure of the clamp element 10 is not so complicated. Such a clamp element 10 can also be manufactured at low cost.

  When such a clamp element 10 is fixed to the base plate 40, a normal bolt 42 is used and a screw hole (not shown) provided in the base plate 40 through a bolt hole 32 provided in the mounting flange portion 14. The clamping element 10 can be attached to the base plate 40, and the screw hole of the base plate 40 into which the bolt 42 is screwed is a normal screw hole. Well, it is not necessary to adopt a special screw structure opposite to the male screw 36 of the pull-in bolt 16. However, even if the screw structure is in the same direction as the male screw 36 of the pull-in bolt 16, the screw 42 for fixing the pull-in bolt 16 does not loosen the bolt 42 for fixing to the base plate 40. For this reason, since the threading action with respect to the base plate 40 can be carried out by using a normal threading tool, the mounting operation of the clamp element 10 to the base plate 40 becomes easy. Furthermore, the usability can be improved effectively.

  Further, in the clamp element 10, the dimensional accuracy of the mounting flange portion 14 is determined, and when the mounting flange portion 14 is placed on the base plate 40, Since the mounting plate 52 of the vise 50 is fixed and held on the base plate 40 at a height corresponding to the thickness, accurate positioning in the vertical direction (Z direction) can be performed. At the same time, the positioning cylinder portion 30 protruding upward from the element body 12 of the clamp element 10 is fitted into the positioning hole 58 constituting a part of the fixing hole 56 of the mounting plate 52 of the vise 50. This makes it possible to accurately position such a vise device 50 in the XY direction orthogonal to the horizontal direction. And than, than Te, for such a vise device 50 workpiece W is held between the vise body 54, it is possible to perform highly accurate machining.

  By the way, this invention can employ | adopt the structure as shown in FIG.6 and FIG.7 besides the structure like this example clamp element 10. FIG. Unlike the previous example, the clamping element 62 shown in these drawings is not provided with the positioning cylinder portion 30 in the element body 12, and the mounting flange portion 14 can be positioned only in the vertical direction (Z direction). It is characterized in that it is configured to be performed. Here, the same parts as those in the previous example are denoted by the same reference numerals, and detailed description thereof will be omitted.

  Further, an example in which two such clamp elements 62 and two of the previous clamp elements 10 are arranged in a diagonal direction to fix and hold a predetermined article on the base plate is shown in FIGS. Is shown in In these drawings, FIG. 8 corresponds to FIG. 3 described above, and two clamp elements 10 and 62 are attached to the base plate 40 in a diagonal direction. Further, the workpiece 64 as an article shown in FIG. 9 has a rectangular parallelepiped (block) shape, and two kinds of fixings are provided at positions corresponding to the respective arrangement positions of the clamp elements 10 and 62 at the four corners. Holes 66 and 68 are provided penetrating in the vertical direction.

  In this case, the two fixing holes 66, 66 provided on one diagonal line have the same configuration as the fixing hole 56 provided in the mounting plate 52 of the previous vise device 50, as shown in FIG. A positioning hole 70 corresponding to the previous positioning hole 58 is provided so as to be located on the lower surface side of the workpiece 64, and is positioned further behind the positioning hole 70. Thus, a fixing screw hole 72 corresponding to the previous fixing screw hole 60 is provided. Similarly to the above-described example, the positioning cylinder portion 30 of the clamp element 10 is fitted into the positioning hole 70, while the fixing screw hole 72 has the above fixing hole. Similar to the screw hole 60, the male screw 36 of the pull-in bolt 16 in the clamp element 10 can be screwed together. Further, only the male screw 36 of the pull-in bolt 16 in the clamp element 62 is screwed into the fixing holes 68 and 68 formed so as to be positioned on the other opposing line. 74 is only provided.

  Then, the work 64 shown in FIG. 9 is arranged on the base plate 40 shown in FIG. 8, and a hexagon wrench is inserted from above into the fixing holes 66 and 68 provided in the work 64 as in the previous example. Then, it is engaged with the hexagonal hole 38 of the pull-in bolt 16 in each clamp element 10, 62 and rotated, and thus screwed into the fixing screw holes 72, 74 in the respective fixing holes 66, 68. Thus, the workpiece 64 can be effectively fixed and held on the base plate 40 as shown in FIG. Further, for the workpiece 64 fixed and held on the base plate 40 in this manner, for example, as shown in FIG. 10B, a target cutting process is performed by a cutting tooth 78 of a predetermined cutting device 76. Will be given.

  Even in such a structure for fixing and holding the workpiece 64, the vertical positioning thereof can be effectively performed by the mounting flange portions 14 of the respective clamp elements 10 and 62 and provided on a diagonal line. The positioning cylinder portions 30 in the two clamp elements 10 and 10 can be effectively positioned in the horizontal XY directions as in the previous example. For this reason, the cutting of the workpiece 64 by the cutting device 76 can be performed with higher accuracy.

  The exemplary embodiments of the present invention have been described in detail above. However, these are merely examples, and the present invention is not limited to specific descriptions according to such embodiments. It should be understood that this is not to be construed as limiting.

  For example, in the illustrated specific example, the four bolt holes 32 penetrating through the mounting flange portion 14 are provided with a phase difference of 90 °, but the number is appropriately selected. Even if the number is two, three, or more, there is no difference, and even in the arrangement form, they are provided at an appropriate interval.

  Further, in the holding means for holding the drawing bolt 16 in the element main body 12 and the urging means for urging it so as to protrude outward in the axial direction, other than the screwed structure and the coil spring 24 as illustrated, In addition, various known structures can be employed.

  In addition, although not listed one by one, the present invention can be carried out in an embodiment to which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. It goes without saying that any one of them falls within the scope of the present invention without departing from the spirit of the present invention.

An example of the positioning clamp element according to this invention is shown, Comprising: (a) is the front explanatory drawing, (b) is the plane explanatory drawing. It is a longitudinal cross-sectional explanatory drawing of the clamp element shown by FIG. 1, Comprising: (a) is II-II cross-sectional explanatory drawing (partially notched) in FIG.1 (b), (b) is the drawing bolt. It is longitudinal cross-sectional explanatory drawing corresponding to (a) which shows the state formed by being drawn in in an element main body. FIGS. 1A and 1B show a form in which the clamp element shown in FIG. 1 is attached to a base plate, where FIG. 1A is a plan view explanatory view and FIG. 1B is a front view explanatory view thereof. FIG. 4 shows a vise device fixed and held on the base plate shown in FIG. 3, (a) is an explanatory view of the plan view, and (b) is a cross-sectional view taken along IV-IV in (a). FIG. FIG. 5 is an explanatory view corresponding to the cross section of FIG. 4B, showing a state in which the vise device shown in FIG. 4 is fixed and held on the base plate shown in FIG. 3. It shows another example of the positioning clamp element according to the present invention, and (a) and (b) are explanatory views corresponding to FIGS. 1 (a) and (b), respectively. FIG. 7 is an explanatory cross-sectional view of the clamp element shown in FIG. 6, and (a) and (b) are cross-sectional explanatory views corresponding to FIGS. 2 (a) and (b), respectively. FIG. 9 is an explanatory diagram corresponding to FIG. 3 using two clamp elements shown in FIG. 1 and FIG. 6, and (a) and (b) are respectively (a) and (b) in FIG. 3. It is explanatory drawing corresponding to (). 8A and 8B show a workpiece fixed and held on the base plate shown in FIG. 8, wherein FIG. 8A is a plan view explanatory diagram thereof, and FIG. 8B is an IX-IX cross-sectional explanatory diagram in FIG. is there. 9 shows what the workpiece shown in FIG. 9 is fixed and held on the base plate shown in FIG. 8, (a) is a sectional explanatory view corresponding to the sectional form in FIG. ) Is a front explanatory view showing one step of performing cutting on such a fixed and held workpiece.

Explanation of symbols

10, 62 Clamp element 12 Element body 14 Mounting flange portion 16 Pull-in bolt 18 Stepped portion 20 Small diameter inner surface 22 Large diameter inner surface 24 Coil spring 26 Closure sleeve 28 Screw portion 30 Positioning cylinder portion 32, 46 Bolt hole 32a Head accommodation Hole 32b Leg insertion hole 34 Locking flange portion 36 Male screw 38 Hexagonal hole 40 Base plate 42 Bolt 44 Mounting hole 50 Vise device 52 Mounting plate 54 Vise body 56, 66, 68 Fixing hole 58, 70 Positioning hole 60 , 72, 74 Screw holes for fixing 64 Work piece 76 Cutting device 78 Cutting teeth

Claims (5)

A clamp element for fixing and holding a predetermined article on a predetermined base plate,
A cylindrical element body that is accommodated in a mounting hole provided at least in the base plate at the bottom;
A mounting flange portion provided integrally with the outer peripheral portion of the element body so as to extend outward in a direction perpendicular to the axis with a predetermined thickness, and provided with a bolt hole for fixing the bolt to the base plate;
The element is accommodated in the cylinder of the element body, and is protruded axially outward from the upper end of the element body for screwing into a fixing screw hole provided in the article, and the amount of protrusion is restricted. A pull-in bolt with an external thread formed on the outer peripheral surface,
A positioning clamp element, characterized by comprising:   The element main body integrally has a positioning cylinder part projecting a predetermined height axially outward from the upper surface of the mounting flange part, and the positioning cylinder part is fitted into a positioning hole provided in the article. The positioning clamp element according to claim 1, wherein the positioning clamp element is configured to be configured as described above.   The bolt hole provided in the mounting flange portion has a large-diameter head accommodating hole that accommodates the bolt head and a small-diameter penetrating bolt bolt provided through the bottom of the head accommodating hole. The positioning clamp element according to claim 1, wherein the positioning clamp element comprises a leg insertion hole.   The element body has biasing means for biasing the pull-in bolt so as to protrude axially outward from the upper end of the element body, and resists the biasing force of the biasing means, The positioning clamp element according to any one of claims 1 to 3, further comprising holding means for holding the drawing bolt in a cylinder of the element body. The mounting flange portion is mounted on the base plate, and the article is fixed and held on the base plate at a height corresponding to the thickness of the mounting flange portion. 5. The positioning clamp element according to any one of 4 above.

Images