JP4582967B2 - Clamping device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamping device for fixing a work on a table.
[0002]
[Prior art]
Japanese Patent No. 3101802 shows a clamp device in which the fixing position on the table surface is adjustable and the clamp is moved up and down by a hydraulic mechanism. In this way, even if the shape, dimensions, etc. of the workpiece (hereinafter referred to as shape, etc.) change, a versatile clamping device that can be used in common can be obtained without providing a dedicated jig for each. .
[0003]
[Problem to be Solved by the Invention]
By the way, the conventional clamping device includes a hydraulic mechanism, so that the structure is complicated and expensive. Therefore, a clamp device that can achieve the same effect with a simpler and less expensive structure is desired. The present invention fulfills such a demand.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the clamping device of the present application is provided with a clamp shaft orthogonal to the surface of the table on which the workpiece is placed, and is a clamp device for fixing the workpiece onto the table by a clamp provided on the clamp shaft, In one comprising a lateral position adjusting means for moving the clamp shaft on the table surface and fixing it at a predetermined position, and a height adjusting means for adjusting an interval from the table surface to the clamp, The height adjusting means includes an inner / outer cylinder fitted into the clamp shaft so as to be relatively movable in the length direction, and a lock means for locking or unlocking between the inner and outer cylinders. A rod member that is housed in the frame, and at least a part of the rod member is locked or unlocked by rotating about a longitudinal axis. It is characterized in.
[0005]
At this time, as the locking means, a recess formed in the outer peripheral portion of the rod member, and a lock that moves to the unlock position when it coincides with the concave portion and moves to the lock position by the outer peripheral portion other than the concave portion of the rod member. And the ball member, and the recess can be rotated and locked or unlocked by the rotation of the rod member.
[0006]
Further, as the locking means, an annular groove formed on the outer peripheral portion of the rod member, and when the locking means coincides with the annular groove, the lock member moves to the unlock position, and the outer peripheral portion of the rod member other than the annular groove moves to the lock position. And a lock ball that moves, and can be configured to be locked or unlocked by moving the annular groove in the longitudinal direction of the inner cylinder by the rotation of the rod member.
[0007]
【The invention's effect】
When the shape of the workpiece changes, the clamping device of the present invention includes a lateral position adjusting means and can be moved to a predetermined position on the table surface and fixed. In addition, the clamp height adjusting means is composed of a clamp shaft made of inner and outer cylinders that can be moved relative to each other by fitting inside and outside, and a lock means that locks or unlocks the inner and outer cylinders. The height of the clamp can be adjusted by changing. Therefore, even if the shape or the like of the workpiece changes, it can be reliably fixed by adjusting the horizontal position adjusting means and the height adjusting means correspondingly. Therefore, since it is not necessary to provide a dedicated jig for each workpiece as compared with the conventional case, the clamping device has versatility. In addition, since the locking means is fitted into the inner cylinder and at least a part of the locking means is rotated around the longitudinal axis to lock or unlock, the lock structure can be made relatively simple and inexpensive. Easy to operate.
[0008]
At this time, if the recess means is formed in the outer peripheral portion of the rod member as the lock means, and the lock ball is moved to the lock or unlock position by the rotation of the recess portion, the rod member is rotated. When the position of the recess is changed, when the recess matches the lock ball, the lock ball moves backward to the unlock position and unlocks between the inner and outer cylinders. The outer peripheral portion other than the concave portion of the member can be advanced to the lock position to lock the inner and outer cylinders.
[0009]
Further, as the locking means, if an annular groove is formed in the outer peripheral portion of the rod member and the lock ball is moved to the lock or unlock position depending on the position of the annular groove, a part of the rod member is rotated. The position of the annular groove is changed by moving the position of the annular groove in the longitudinal direction of the inner cylinder. When the annular groove matches the lock ball, the lock ball moves backward to the unlock position and unlocks between the inner and outer cylinders. When the annular groove moves to a place where it does not coincide with the lock ball, the lock ball can be advanced to the lock position by the outer peripheral portion other than the annular groove of the rod member, and the inner and outer cylinders can be locked.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment will be described below with reference to the drawings. 1, 2 and 3 are a partially cutaway front view, a plan view, and a left side view of a work table to which the clamping device of the embodiment is applied, respectively. FIG. 4 is an enlarged cross-sectional view of a clamp device portion, and FIG. 5 is a view showing a lock piece.
[0011]
First, in FIGS. 1 to 3, a guide groove 3 is provided in the longitudinal direction at the center of the table surface, which is the upper surface of the table 1 having a substantially rectangular shape in plan view, and a rail 4 is formed on the opposing surface facing the guide groove 3. The clamp device 5 is provided along the rail 4 so as to be movable in the length direction.
[0012]
The base 6 of the clamp device 5 holds the rail 4, and the clamp device 5 can be moved and fixed to a predetermined position in the longitudinal direction of the guide groove 3 by rotating a tightening screw 7 provided on the base 6 with a handle 8. These guide grooves 3, rails 4, base 6, tightening screw 7 and handle 8 constitute a lateral position adjusting means of the clamping device 5.
[0013]
Further, the clamp device 5 includes a clamp shaft 10 that stands upright from the base 6 toward the upper direction orthogonal to the table surface 2. The clamp shaft 10 includes an outer cylinder 11 and an inner cylinder 12 that fit inside and outside. The outer cylinder 11 is a fixed side member integrated with the base 6, and the inner cylinder 12 is fitted inside the outer cylinder 11 and is slidable in the vertical direction.
[0014]
Between the outer cylinder 11 and the inner cylinder 12, a locking means described later is provided to form a height adjusting means. A clamp 13 is fixed to the upper part of the inner cylinder 12. The clamp 13 extends in the horizontal direction perpendicular to the 12 axis.
[0015]
As shown in FIG. 4, a clip 14 provided on the inner cylinder 12 supports the lower side of the clamp 13 and is formed at the upper end of a round bar-shaped lock piece 15 that is a rod member inserted into the inner cylinder 12. A small-diameter square shaft portion 16 penetrates upward from the clamp 13, and a nut 17 is connected to the rotation-stop coupling here. Further, a bolt 18 is fastened to the screw hole of the square shaft portion 16 from above, whereby the nut 17 Is clamped and fixed onto the clamp 13. A clamp pin 19 is inserted between the upper ends of the inner cylinder 12 to prevent the clamp 13 from rotating.
[0016]
The lower end portion of the lock piece 15 is provided with several stages of lock grooves 20 in the longitudinal direction, and as shown in FIG. 5, a taper portion 22 is formed which continues the lock groove 20 and a large diameter portion 21 sandwiching the lock groove 20, and A dihedral width portion is formed around the periphery, and a flat portion 23 is formed in a part thereof. The flat portion 23 is continuous with the lock groove 20. In the figure, A is a top view of the lock piece 15, and B is a cross-sectional view along BB.
[0017]
Round holes 24 of the same number as the number of the lock grooves 20 are formed in a portion corresponding to the lock grooves 20 of the inner cylinder 12 surrounding the lock piece 15, and lock balls 25 that enter and exit are provided. On the other hand, in the range where the lower part of the inner cylinder 12 slides on the inner surface of the outer cylinder 11, a large number of grooves 26 having a V-shaped cross section are formed continuously in the vertical direction.
[0018]
As is apparent from FIG. 4, the lock piece 15 can be rotated around its axis by pinching the nut 17. When the tapered portion 22 of the lock piece 15 faces the round hole 24, the lock ball 25 is locked. Is pushed radially outward from the round hole 24 and engaged with the groove 26 of the outer cylinder 11. As a result, the outer cylinder 11 and the inner cylinder 12 are coupled to each other, and the vertical movement of the inner cylinder 12 with respect to the outer cylinder 11 is disabled.
[0019]
Further, when the flat piece 23 faces the round hole 24 by rotating the lock piece 15 by 90 °, the lock ball 25 enters the flat piece 23 on the inner side from the round hole 24 and is detached from the groove 26 of the outer cylinder 11. Then, the unlocked state in which the coupling between the outer cylinder 11 and the inner cylinder 12 is released, and the inner cylinder 12 is movable up and down with respect to the outer cylinder 11.
[0020]
Next, the operation of this embodiment will be described. When the work 27 is placed on the table surface 2 and the upper surface side is pressed and fixed by the clamp 13, when the shape of the work 27 is changed and adjustment is required, the horizontal position on the table surface 2 is first adjusted. To do. In this case, the handle 8 is turned to loosen the screw 7, the clamp device 5 is moved in the direction of the guide groove 3 along the rail 4, and the screw 7 is tightened again by the handle 8 at a predetermined position.
[0021]
Further, to adjust the height, in FIG. 4, to Anne locked position by rotating the lock piece 15 90 ° Squeeze the nut 17 in the locked position. As a result, the inner cylinder 12 can be arbitrarily moved up and down with respect to the outer cylinder 11, and the clamp 13 is adjusted so as to come into contact with the work 27. When the lock piece 15 is rotated 90 ° again, the inner cylinder 12 is locked. 12 is fixed so that it cannot move up and down.
[0022]
Therefore, by providing the horizontal position adjusting means and the height adjusting means, the position on the table surface 2 and the height of the clamp 13 can be arbitrarily moved and adapted to the work 27 even if the shape of the work 27 changes. And the work 27 can be securely fixed.
As a result, the clamping device 5 can be used in common for a plurality of workpieces 27, and it is not necessary to provide a dedicated clamping device every time the shape of the workpiece 27 changes, increasing versatility, simplifying the structure, and reducing the cost.
[0023]
Further, since the clamp 10 is configured as an inner / outer cylinder and the lock piece 15 is simply rotated, the lock 10 can be locked and unlocked. In addition, a large number of lock grooves 20 can ensure the locking, and the durability of each part constituting the locking means can be increased, and the rotation angle of the lock piece 15 can be adjusted to rapidly move to the unlocked state. Switching can be prevented.
[0024]
6 and 7 show another embodiment of the locking means. FIG. 6 corresponds to FIG. 4 and FIG. 7 corresponds to FIG. In this embodiment, the lock piece 15 is divided into an upper rod 30 and a lower piece 31, and the upper rod 30 has a long bolt shape and has a head portion 32 and a screw portion 33 at both ends.
[0025]
On the other hand, the lower piece 31 has an annular lock groove 34 formed in a multi-stage around it, and is continuous with a tapered surface 36 between the large-diameter portion 35 and a small-diameter neck portion 37 at the upper end, which is formed at the axial center thereof. The screw portion 33 of the upper rod 30 is coupled to the screw hole 38.
[0026]
A projecting portion 39 projecting in the diametrical direction is provided at the lower end of the lower piece 31, and a coil spring 41 is disposed between the projecting portion 39 and the recess 40 formed around the neck portion 37 of the inner cylinder 12. 7A is a bottom view of the lower piece 31. FIG.
[0027]
The round hole 24, the lock ball 25, and the groove 26 are the same as in the previous embodiment. In this way, when the upper rod 30 is rotated, the screw part 33 moves forward and backward with respect to the projecting part 39, whereby the lower piece 31 moves in the axial direction inside the inner cylinder 12, and the lock groove 34 is formed in the round hole 24. If they match, the lock ball 25 enters the lock groove 34 and is unlocked.
[0028]
On the contrary, when the tapered surface 36 coincides with the round hole 24, the lock ball 25 is pushed out to be a lock engaged with the groove 26. If it does in this way, since the lower piece 31 becomes a simple structure which forms the lock groove 34 and the taper surface 36 in a perimeter, the structure of the lower piece 31 is simplified and manufacture is easy.
[Brief description of the drawings]
1 is a partially cutaway front view of a table according to a first embodiment. FIG. 2 is a plan view of the same. FIG. 3 is a left side view of the same. FIG. 4 is an enlarged sectional view of locking means. FIG. 6 is a diagram corresponding to FIG. 4 of the second embodiment. FIG. 7 is a diagram corresponding to FIG.
1: Table, 2: Table surface, 3: Guide groove, 4: Rail, 5: Clamping device, 8: Handle, 10: Clamp shaft, 11: Outer cylinder, 12: Inner cylinder, 13: Clamp, 15: Lock piece 17: nut, 20: lock groove, 21: large diameter part, 22: taper part, 23: flat part, 24: round hole, 25: lock ball, 26: groove, 30: upper rod, 31: lower piece, 32: Head, 33: Screw part, 34: Lock groove, 35: Large diameter part, 36: Tapered surface

Claims (3)

A clamp device orthogonal to the surface of the table on which the workpiece is placed is provided, and the workpiece is fixed on the table by a clamp provided on the clamp shaft, and the clamp shaft is moved on the table surface. and a lateral position adjusting means, e Bei a height adjusting means for adjusting the distance from the table surface to the clamp, said height adjusting means has a length constituting the clamp shaft is to fix at a predetermined position An inner and outer cylinders fitted so as to be relatively movable in the direction, and a lock means for locking or unlocking between the inner and outer cylinders, the locking means comprising a rod member housed in the inner cylinder, at least of the rod member In what is locked or unlocked by rotating a part about the longitudinal axis ,
The locking means moves to the unlocked position when the concave portion (20, 23) formed in the outer peripheral portion of the rod member (15) coincides with the concave portion (20, 23), and the rod member (15) And a lock ball (25) that moves to a lock position by an outer peripheral portion (22) other than the concave portion, and by rotating the rod member (15), the concave portion is rotated to lock or unlock,
The rod member (15) is rotatable with respect to the inner cylinder (12). At the end of the rod member (15) in the longitudinal direction, there is a lock groove (20) and an outer diameter of the lock groove. A large-diameter portion (21), a tapered portion (22) continuous with the large-diameter portion (21) and the locking groove (20), and two surfaces provided on the tapered portion (22). A flat portion (23) formed by a width portion is formed, and the flat portion (23) and the lock groove (20) continuously form the concave portion (20, 23),
A round hole (24) is formed in a portion corresponding to the lock groove (20) of the inner cylinder (12), and the lock ball (25) enters and exits from this,
In the range where the inner cylinder (12) slides on the inner surface of the outer cylinder (11), a plurality of grooves (26) having a V-shaped cross section are continuously formed in the longitudinal direction,
When the taper portion (22) of the rod member (15) faces the round hole (24), the lock ball (25) is pushed radially outward from the round hole (24). The inner cylinder (12) with respect to the outer cylinder (11) is brought into a locked state in which the outer cylinder (11) and the inner cylinder (12) are coupled by engaging with the groove (26) of the outer cylinder (11). Can not move up and down
When the rod member (15) is rotated so that the flat surface portion (23) faces the round hole (24), the lock ball (25) is moved from the round hole (24) to the flat surface portion (23) inside. Enters upward, disengages from the groove (26) of the outer cylinder (11), unlocks the connection between the outer cylinder (11) and the inner cylinder (12), and removes the inner cylinder (12) from the outer cylinder (12). A clamping device characterized by being vertically movable with respect to the cylinder (11) . A clamp device orthogonal to the surface of the table on which the workpiece is placed is provided, and the workpiece is fixed on the table by a clamp provided on the clamp shaft, and the clamp shaft is moved on the table surface. A lateral position adjusting means for fixing at a predetermined position; and a height adjusting means for adjusting an interval from the table surface to the clamp, wherein the height adjusting means is a length direction constituting the clamp shaft. And an inner / outer cylinder fitted to be movable relative to each other, and a lock means for locking or unlocking between the inner and outer cylinders. The lock means includes a rod member accommodated in the inner cylinder, and at least one of the rod members. In what is locked or unlocked by rotating the part around the longitudinal axis,
Said locking means, said rod outer peripheral portion formed in an annular groove of the member (34) moves to the matched when unlocked position in the annular groove (34), the rod member other than the annular groove (15) A lock ball (25) that moves to the lock position by the outer periphery of the rod member, and the rod member ( 15) is rotated or moved in the longitudinal direction to lock or unlock the annular groove (34) .
The rod member (15) is divided into an upper rod (30) and a lower piece (31). The upper rod (30) has a long bolt shape, and has a head (32) and a screw portion (33) at both ends. Have
The lower piece (31) is provided with an annular lock groove (34) that forms the annular groove around the periphery, and a large-diameter portion (35) larger in diameter than the outer diameter of the lock groove (34). A taper portion (36) continues between the diameter portion (35) and the lock groove (34), a small diameter neck portion (37) is formed at the upper end, and an upper portion is formed in a screw hole (38) formed in the shaft center. Join the thread (33) of the rod (30),
A projecting portion (39) projecting in the diameter direction is provided at the lower end of the lower piece (31), and a recess (40) formed around the projecting portion (39) and the neck portion (37) of the inner cylinder (12). ) Provide a coil spring (41) between
A round hole (24) is formed in a portion corresponding to the lock groove (20) of the inner cylinder (12), and the lock ball (25) enters and exits from this,
In the range where the inner cylinder (12) slides on the inner surface of the outer cylinder (11), a plurality of grooves (26) having a V-shaped cross section are continuously formed in the longitudinal direction,
When the upper rod (30) is rotated, the screw part (33) advances and retreats with respect to the projecting part (39), so that the lower piece (31) moves axially inside the inner cylinder (12). When the lock groove (34) is aligned with the round hole (24), the lock ball (25) enters the lock groove (34) and becomes unlocked.
On the contrary, when the taper part (36) coincides with the round hole (24), the lock ball (25) is pushed out and becomes a lock engaged with the groove (26) . A plurality of the lock grooves (20, 34) are provided in the axial direction of the rod member (15), and the same number of the round holes (24) and the lock balls (25) as the lock grooves (20, 34) are provided. clamping device according to claim 1 or 2, characterized in.

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