JP2011179663A - Clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp capable of surely holding a workpiece by rotating a holding cam to bite into the surface of the workpiece when clamping the workpiece. <P>SOLUTION: A movable jaw member 13 includes a rotating slide block 18 slidably enclosed in a storage hole 15 opened to the inner surface of one leg part 12a and pressed and energized toward an outlet; a movable jaw 17 with its swing head 17a mounted in a swingable manner into a turning hole 19 opened to the inner surface side of the rotating slide block 18; and a guide pin 23 inserted in an inclined hole 22 provided in one of the one leg part 12a and the rotating slide block 18 and inclining with respect to an axial direction, mounted to the other of the one leg part 12a and the rotating slide block 18, and inserted in a locking hole 17g recessed in the swing head 17a of the movable jaw 17. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a clamp used to suspend and hold a work such as an iron plate, a shape steel, and a flat steel with a wire rope.

  An example of this type of clamp is disclosed in Patent Document 1 (FIG. 3), for example. This conventional clamp has a generally U-shaped clamp body having a pair of legs facing each other across an opening, a rotating jaw rotatably mounted on the one leg, and penetrating the other leg. A pressure nut that is mounted so as not to rotate relative to the mounting hole and that can move in the axial direction; a tightening bolt that is screwed into the female screw of the pressure nut and faces the rotating jaw; and The urging means for urging the tip portion in a direction to protrude from the inner opening end of the other leg portion, and the tightening bolt was tightened with a suspended load sandwiched between the rotating jaw and the tightening bolt. Tightening confirmation means provided on the pressure nut for confirming that a prescribed tightening force has acted on the suspended load when the pressure nut is retracted a predetermined distance against the biasing means. Therefore, the tightening confirmation means is a ring member fitted in a state of being completely accommodated in a circumferential groove formed on the outer peripheral portion of the tip of the pressure nut at a predetermined position, and the presence of the tightening confirmation means The tightening confirmation means retreats and enters the mounting hole so that it cannot be seen from the outside, so that the completion of tightening can be confirmed from the outside, and reliable tightening can always be confirmed from the outside.

Japanese Patent No. 3655151 (FIG. 3)

  However, the tightening bolt only moves in the axial direction in the protruding direction opposite to the immersion direction of the pressure nut attached to the other leg portion so as not to rotate relative to the other leg and relatively movable in the axial direction when the workpiece is tightened. The rotating jaw only swings the head along the tilt of the workpiece, and the workpiece is simply clamped by the clamping force of the clamping bolt.

  Therefore, if a foreign object is caught in the mounting part of the rotating jaw with the leg, or if the movement of the tightening bolt is poor, the rotating jaw or The tightening bolt may move slightly, reducing the tightening force of the tightening bolt and dropping the workpiece.

  The present invention has been made in view of such conventional problems, and the clamping cam rotates and bites into the surface of the work when the work is tightened, and the work can be securely held, and at the same time, the work is tightened from the outside. It is to provide a clamp that can be confirmed.

  According to the first aspect of the present invention, “a substantially U-shaped clamp body 12, a movable jaw member 13 provided on the inner surface side of one leg portion 12a of the clamp body 12, and a movable jaw member 13 on the other leg portion 12b”. The movable jaw member 13 is slidably accommodated in the accommodation hole 15 opened in the inner surface of the one leg portion 12a. The rotary slide block 18 pressed and urged toward the outlet, and the movable jaw 17 having a swinging head 17a swingably attached to a rotation hole 19 opened on the inner surface side of the rotary slide block 18; The one leg portion 12a or the rotary slide block 18 is inserted into the inclined hole 22 that is inclined with respect to the axial direction provided in either one of the leg portions 12a or the rotary slide block 18. 8 and a guide pin 23 that is inserted into a locking hole 17g that is recessed in the swinging head 17a of the movable jaw 17 ". is there.

  According to the second aspect of the present invention, in the clamp 10 according to the first aspect, “the fixing mark 24 is provided on the outer surface of the one leg portion 12a, and the rotation is performed by the necessary rotation amount in the rotation direction of the inclined hole 22 when tightening. When the slide block 18 is rotated, a rotation mark 25 corresponding to the fixed mark 24 is provided on the protruding portion 26 from the leg portion 12a of the rotary slide block 18 ".

  According to the present invention, when the work 11 is tightened, the movable jaw member 13 slides in the direction in which the leg portion 12 a is inserted into the storage hole 15 against the pressing biasing direction by tightening the clamp screw 14. At this time, the rotating slide block 18 is guided by the guide pin 23 and rotates while being immersed in a direction perpendicular to the axial direction of the inclined hole 22.

  Here, since the guide pin 23 is inserted into the locking hole 17g of the swinging head 17a of the movable jaw 17, the movable jaw 17 rotates with the rotation of the rotary slide block 18, and the movable jaw 17 moves to the workpiece 11. The surface of the workpiece 11 is bitten and the work 11 is securely held.

  Moreover, when the rotary slide block 18 is rotated by the rotation amount (S) of the inclined hole 22 in the rotation direction, it rotates to the fixed mark 24 provided on the protruding portion 26 of the rotary slide block 18 from the leg 12a. Since the mark 25 matches, it is possible to confirm the completion of tightening from the outside.

It is a partially notched front view which shows the clamp concerning this invention. FIG. 2 is a partial cross-sectional view taken along line XX before tightening of the workpiece in FIG. 1. FIG. 2 is a partial cross-sectional view taken along the line XX after the workpiece is tightened in FIG. 1. It is a partial front view showing the relationship between the fixed mark and movable mark of this invention. It is the side view which shows the fixed cylinder part of this invention, a longitudinal cross-sectional view, and a cross-sectional view. It is the front view and cross-sectional view which show the movable jaw of this invention. It is sectional drawing which shows the rotation slide block of this invention.

  The present invention will be described below with reference to the drawings. As shown in FIG. 1, the clamp body 12 of the clamp 10 is substantially U-shaped, and hanging rings 20 and 21 for attaching ropes are formed on the outer surface of the body portion and one leg portion 12 a. A movable jaw member 13 is attached to the inner surface side of the leg portion 12a, and a clamp screw 14 is attached to the other leg portion 12b so as to be able to be screwed back and forth toward the movable jaw member 13. The inner surface of one leg 12a is provided with a concave hole 28 formed in a step shape by gradually reducing the diameter in two steps (may be formed in three or more steps). Each of them has a large diameter hole 28a and a small diameter hole 28b, and a fixed cylinder part 29 constituting a part of one leg 12a is fitted into the large diameter hole 28a and fixed with a set screw. In the state where the fixed cylinder portion 29 is attached to the large diameter hole portion 28a, the hollow portion from the inner peripheral surface of the fixed cylinder portion 29 to the small diameter hole portion 28b becomes the storage hole 15 that opens to the inner surface of the leg portion 12a.

  As shown in FIG. 5, the fixed cylinder portion 29 is formed with inclined holes 22 that are inclined with respect to the axial direction on the side surfaces thereof, and fixing holes 30 that serve as set holes for set screws are recessed on both sides. ing.

  As shown in FIG. 6, the movable jaw 17 of the movable jaw member 13 has a disk-like shape in which a spherical swinging head 17a, a narrow neck 17b and a neck 17b following the spherical swinging head 17a are provided at the center of the outer surface. A sandwiching cam 17c in which a sandwiching surface 17d with a workpiece 11 on the side is formed into a projecting curved surface obtained by cutting off a part of a spherical surface, and a plurality of concentric multiple projecting ridges or many conical projections 17e are formed. It consists of A hemispherical or conical concave hole 17f is formed in the top of the swinging head 17a.

  A locking hole 17g is recessed in the side surface of the swinging head 17a. In this embodiment, the locking hole 17g is an elongated hole extending in the axial direction in order to make the movable jaw 17 swingable.

  As shown in FIG. 7, the rotary slide block 18 of the movable jaw member 13 includes a large-diameter portion 18a and a small-diameter portion 18b that is coaxial with the large-diameter portion 18a and protrudes from the center thereof. A rotation hole 19 is formed in the large-diameter portion 18a of the rotary slide block 18, and a spring holding hole 18c penetrating from the hole bottom to the small-diameter portion 18b is formed. Two through holes 18d are formed at a predetermined interval. Further, a through hole 18e that penetrates the rotation hole 19 from the outer surface is formed in the side surface of the large diameter portion 18a.

  In the above-described embodiment, the case where the inclined hole 22 is formed in the fixed cylinder portion 29 and the through hole 18e is formed in the rotary slide block 18 is shown, but the relationship between the fixed cylinder portion 29 and the rotary slide block 18 is as follows. It is sufficient that the fixed cylinder part 29 and the rotary slide block 18 constituting one leg part 12a rotate relative to each other when the rotary slide block 18 moves in the immersion direction with respect to the fixed cylinder part 29 at the time of tightening. However, the through hole 18 e may be formed in the fixed cylinder portion 29 and the inclined hole 22 may be provided in the rotary slide block 18.

  The guide pin 23 has a cylindrical shape, and is fitted into the through hole 18e, the locking hole 17g formed in the long hole, and the inclined hole 22 in a state where there is no rattling with respect to the short diameter. Has a diameter.

  The rotary slide block 18 is slidably and rotatably stored in the storage hole 15 opened on the inner surface of the one leg portion 12 a, and the small diameter portion 18 b of the rotary slide block 18 is the small diameter hole portion 28 b of the storage hole 15. A large-diameter hole portion of the storage hole 15 is fitted into the elastic hole 16, which is slidably and rotatably fitted therein, and is fitted with a plurality of springs so as to surround the outer periphery of the small-diameter portion 18 b. The bottom of the hole 28a and the stepped portion of the rotary slide block 18 are brought into contact with each other to bias the rotary slide block 18 in the pushing direction.

  In addition, a coil spring 33 is disposed in the spring holding hole 18c of the rotary slide block 18, and the coil spring 33 is necked through a ball 34 fitted in the concave hole 17f of the swinging head 17a of the movable jaw 17. The swinging head 17a is pressed and urged in the pushing direction. Comparing the elastic force of the coil spring 33 and the elastic force of the elastic material 16, the elastic force of the elastic material 16 is configured to be stronger than the elastic force of the coil spring 33.

  The swinging head 17a of the movable jaw 17 is fitted in the rotation hole 19 of the rotary slide block 18, and the front and rear of the swinging head 17a are inserted by pins 34 inserted into the two through holes 18d. Movement in the direction is restricted. As described above, the swinging head 17a of the movable jaw 17 is attached to the rotary slide block 18 without any play, but the swinging motion in the rotation hole 19 is possible.

  Further, a fixing mark 24 is provided on the outer surface of one leg portion 12a (in this embodiment, the protruding portion 29a of the fixed cylinder portion 29 from the leg portion 12a).

  On the other hand, the protruding portion of the leg portion 12a of the rotary slide block 18 (in this embodiment, the protruding portion 26a from the fixed cylinder portion 29) corresponds to the fixing mark 24, and the inclined hole 22 rotates when tightened. When the rotary slide block 18 is rotated by the amount of rotation in the direction, a rotation mark 25 that matches the fixed mark 24 is provided.

  In this embodiment, the fixed mark 24 and the rotation mark 25 are formed by applying a white or yellow phosphorescent paint in a rectangular shape so as to stand out against a black background in a portion engraved along the axial direction. . The fixed mark 24 and the rotation mark 25 may be provided at one place, or may be formed on the outer peripheral surfaces of the protruding portions 29a and 26a over the entire circumference at equal intervals.

  The other leg portion 12b of the clamp body 12 is provided with a through-thick hole 31 directed to the movable jaw member 13, and a nut member 32 that integrally forms the other leg portion 12b is fitted into this through-thick hole 31. It is.

  A female screw is engraved on the inner peripheral surface of the nut member 32, and a screw fixing hole 32a is recessed on the outer peripheral surface. A large-diameter clamp screw 14 is screwed on the nut member 32 so as to be able to be screwed back and forth.

  On the clamping surface 14a of the clamping screw 14 facing the clamping surface 17d of the clamping cam 17c, sharp concentric ridges or a large number of conical projections 14e are formed in the same manner as the clamping surface 17d. A hexagonal column-shaped spanner hanging portion 14b is provided on the opposite side portion, and a handle insertion hole 14c penetrating from one surface to the opposite side surface is formed in the spanner hanging portion 14b. Are installed as needed.

  Thus, the workpiece 11 is disposed between the movable jaw member 13 and the clamp screw 14, and the clamp screw 14 is rotated to be screwed. The workpiece 11 is sandwiched between the clamp screw 14 and the movable jaw member 13 as the clamp screw 14 is screwed (see FIG. 2).

  As described above, the swinging head 17a of the movable jaw 17 is in a freely swingable state, and the movable jaw 17 is formed by a locking hole 17g which is a long hole in accordance with the clamping state of the workpiece 11. The head is swung according to the guide action of the guide pin 23, and the workpiece 11 is clamped at an angle that is just right in relation to the clamp screw 14. At this time, the rotation mark 25 is located away from the fixed mark 24 as shown in FIG.

  When the clamp screw 14 is further screwed, the elastic body 16 and the coil spring 33 are both bent and pushed until the small-diameter portion 18b of the rotary slide block 18 hits the bottom of the small-diameter hole portion 28b of the concave hole 28 (see FIG. 3).

  At this time, the rotary slide block 18 is guided by the guide pin 23 whose outer end is fitted into the inclined hole 22 of the fixed cylinder portion 29 constituting the one leg portion 12a and the through hole 18e of the rotary slide block 18. Rotates relative to the fixed cylinder portion 29. Then, with this rotation, the rotation mark 25 approaches the fixed mark 24 (see FIG. 4B).

  Since the inner end portion of the guide pin 23 is fitted in the locking hole 17g extending in the axial direction of the swinging head portion 17a, the movable jaw 17 also rotates as the rotary slide block 18 rotates. Then, the protrusions or protrusions 17e, 14e of both the clamping surfaces 17d, 14a bite into the surface of the work 11 in cooperation with the clamp screw 14 which is the opposite position via the work 11.

  When the clamp screw 14 is further pushed in this state, the rotation mark 25 approaches the fixed mark 24 as the rotary slide block 18 rotates, and finally coincides. Clamping is completed at the coincidence, and it can be confirmed from the outside that the necessary amount of rotation has been rotated and the necessary tightening has been performed. The protrusion L2 of the protruding portion 26a at this time is smaller than the initial protrusion L1 when the rotary slide block 18 is pushed. As shown in FIG. 3, the small-diameter portion 18 b of the rotary slide block 18 is pushed to the bottom of the small-diameter hole portion 28 b of the concave hole 28.

  When the clamping is completed as described above, a wire rope (not shown) attached to the hanging ring 20 (or 21) of the clamp 10 is pulled, the workpiece 11 is lifted while being held, and transferred to the destination. When the clamp screw 14 is loosened when arriving at the destination, the projectile 16 extends in the reverse direction at the time of clamping, and reversely rotates while pushing out the movable jaw 17 and the rotary slide block 18, and finally the coil spring 33 is fully extended. Then, the clamp 10 is further loosened to move away from the workpiece 11.

DESCRIPTION OF SYMBOLS 10 ... Clamp 11 ... Work 12 ... Clamp main body 12a ... One leg 12b ... The other leg 13 ... Movable jaw member 14 ... Clamp screw 15 ... Storage hole 17 ... Movable jaw 17a ... Swing head 17g ... Locking hole 18 ... Rotating slide block 19 ... Rotating hole 22 ... Inclined hole 23 ... Guide pin 24 ... Fixed mark 25 ... Rotating mark 26 ... Projecting part 29 ... Fixed cylinder part

Claims (2)

(1a) A substantially U-shaped clamp body, a movable jaw member provided on the inner surface side of one leg portion of the clamp body, and a clamp attached to the other leg portion so as to be able to be screwed back and forth toward the movable jaw member In clamps composed of screws,
(1b) The movable jaw member is
(1b1) A rotating slide block that is slidably housed in a housing hole that opens on the inner surface of one leg, and that is pressed and urged toward the outlet,
(1b2) A movable jaw whose swing head is swingably attached to a rotation hole opened on the inner surface side of the rotary slide block;
(1b3) Inserted into an inclined hole inclined with respect to the axial direction provided in either one of the legs or the rotating slide block, attached to either one of the legs or the rotating slide block, and movable It is composed of a guide pin inserted in a locking hole recessed in the oscillating head of the chin
(1c) Clamp. The clamp according to claim 1,
A fixed mark is provided on the outer surface of one leg, and when the rotating slide block is rotated by a necessary amount of rotation in the rotation direction of the inclined hole during tightening, the rotating mark corresponding to the fixed mark is the leg of the rotating slide block. A clamp characterized by being provided in a protruding part from

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