JPS6332964Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates generally to screw type clamps, and more particularly to a rotating cup opening device for a screw type clamp having a rotating cup.

Prior Art The applicant of this application previously applied for a patent for an invention named "screw type clamp" (Japanese Patent Publication No. 56-645).
No. 1057493). In the above patent application, one of a pair of opposing legs of the clamp body forming a slot for receiving an article has a threaded rod, and the other leg has an eccentric cam surface that is slidably supported on a washer. A type of clamp having a thin profile is disclosed. The rotating bowl is provided with a socket having a spherical recess facing the slot side of the other leg, which fits and supports a ring having a complementary spherical surface with respect to the spherical recess, and is limited within the central hole of the ring. A cylindrical grip is provided which is slidably supported over a distance. The cylindrical grip has a gripping surface at the slot side end, and the opposite end has an eccentric cam surface whose distance from the center of rotation of the ring increases from the center to the outside, and the cam The face is supported by a washer. The rotating bowl clamps the article between the screw rod and the threaded rod in a state where the center of the eccentric cam surface of the cylindrical grip is in contact with the washer (this position is called the neutral position), but the clamped article may slip. When the gripper is about to be lifted, the rotating wheel is moved accordingly, and the gripping force is increased by the action of the eccentric cam surface of the cylindrical gripper to prevent the gripper from slipping off. The cylindrical grip, ring, and socket described above are completely similar in structure to those shown in the accompanying drawings of the present application.

Purpose of the invention In a screw type clamp having a rotating head as described above, when the rotating head rotates sufficiently and a strong gripping force is applied, the rotating head and the threaded rod will be able to hold the object between them. It has been found that there may be cases in which the rotating wheel cannot be easily returned to the neutral position and the threaded rod cannot be loosened. Although being in a locked state is welcome as it means that the safety objective has been achieved, the time it takes to release the item from the clamp for the next operation is a major drawback to work efficiency. This is undesirable as it reduces the However, safety cannot be sacrificed to improve work efficiency.

The object of the present invention is to provide a device for releasing a rotating bowl from a locked condition when a locked condition occurs as described above.

Structure of the invention According to the invention, a housing is provided on the other leg on the opposite side of the rotating head with respect to the washer, the washer is made thicker, and the back surface thereof has an inclined sliding contact that protrudes into the housing. a surface for slidably guiding the washer in the direction of movement toward the slot or retracting toward the housing; a movably guided cotter is provided, the cotter is provided with a wedge surface that is slidable on the sliding surface of the washer and has an inclination equal to but opposite to the inclination of the sliding surface; An actuating means is provided for moving and fixing the washer within the housing in a direction generally perpendicular to the sliding direction of the washer. There can be various forms of actuation means for moving and fixing the kotta, but one form is:
A threaded portion integrally formed with the clasp is made to protrude outside the housing from a small hole provided in one wall of the housing, and a nut is screwed onto the threaded rod via a washer.

Function: Therefore, the cotter is usually fixed and held in a position that pushes the washer toward the slot by means of an actuating means that moves and fixes it, and when a locked condition occurs, the cotter is released after loosening the said actuating means. The washer is retracted into the housing by loosening by tapping, thereby releasing the rotating bowl.

DESCRIPTION OF THE EMBODIMENTS The outline of the present invention has been described above, and the present invention will be described in further detail below with reference to the accompanying drawings.

FIG. 1 shows a clamp 1 according to an embodiment of the present invention.
0, FIG. 2 is a right side view thereof, and FIG. 3 is a partial sectional view taken along the line 3--3 in FIG. 1. The clamp 10 includes a clamp body 11 having a slot S for receiving an article, a shackle 12 for hoisting the clamp body, and a tightening mechanism provided on one of a pair of legs of the clamp body facing each other with the slot S in between. It has a threaded rod 13 and a rotating cup provided on the other leg. The rotating chamber is indicated generally at 20.

Threaded rod 13 is biased by spring 14 in the direction of protruding into sleeve member 15.
It is shown as being threadedly engaged with a female thread cut into the inner wall of the However, this structure is not an essential configuration of the present invention.

The rotating cup 20 has a cylindrical grip piece 21, a ring 22 that slidably supports the cylindrical grip piece 21, has a cylindrical hole and a spherical side wall, and has a spherical surface complementary to the spherical surface of the side wall of the ring 22. 22 rotatably supported.

The cylindrical grip piece 21 has a hole penetrating in a direction perpendicular to its central axis, and is slidably supported over a limited distance with respect to the ring 22 by a pin inserted into the hole. ing. The ring 22 is
The spherical side wall is rotatably supported within the spherical recess of the socket 23, and the socket 23 is connected to the recess 1 provided in the other leg of the clamp body 11.
It is fitted and fixed within 1a.

A gripping surface is formed at the slot side end of the cylindrical gripping piece 21, and an eccentric cam surface 21a is formed at the opposite end. The cam surface 21a is in sliding contact with a washer 24 and is supported.

All the structures described above are the same as those disclosed in the above-mentioned patents. When the gripping surface of the rotating head 20 rotates in any direction from the illustrated neutral position,
The cylindrical grip piece 21 rotates within the socket 23 together with the ring 22, and at this time, the cylindrical grip piece 21 approaches the inside of the slot due to the action of the eccentric cam surface 21a of the cylindrical grip piece 21 supported by the washer 24. It will be served.

Particularly, referring to FIG. 3, there is shown a cross-sectional view of the rotating cup opening device according to the present invention and its surrounding parts, and in the present invention, the washer 24 has a thick wall and is further away from the rotating cup 20. A sliding contact surface 24a (FIG. 3) that is inclined toward the side is formed. Washer 2
4 is slidably supported within a cylindrical recess 11b formed in the central axis direction of the cylindrical grip piece 21 in the neutral position.

A housing 11c for mounting an opening device is formed in the other leg of the clamp body 11 in the vicinity of the rotary head 20, and the housing has a cavity 11 extending in a direction orthogonal to the cylindrical recess 11b.
d is formed. In the cavity 11d, there is a cotter 2.
5 is slidably fitted.

The cotter 25 has a guide portion 25a in its lower portion in FIG. 3, and has a wedge surface 25b inclined in the opposite direction complementary to the inclined sliding surface 24a of the washer 24 above the guide portion 25a. Further, it has a stopper part 25e having shoulder parts 25c and 25d above it, further has one guide part 25f above it, and further has a threaded part 25g above it. Guide section 25a
is slidably guided to the opening 11f of the cavity 11d. The wedge surface 25b is slidably abutted against the sliding surface of the washer 24. The guide portion 25f is connected to the cavity 1
It is slidably guided by a small hole 11e formed at the upper end of 1d. The threaded part 25g is the small hole 1 mentioned above.
1e and protrudes to the outside of the housing 11c.

A threaded portion 25g protruding from the small hole 11e is screwed into a nut 27 via a washer 26.

Thus, when rotating the nut 27 in the forward direction,
The kotta 25 moves upward in FIG.
The washer 24 is pushed towards the rotating bowl 20 via b. FIG. 3 shows the washer 24 pushed fully toward the rotating cage 20, in which position the clamp is used.

When the rotating head rotates during use and the threaded rod 13 and the rotating head are in a locked state, the nut 27 is loosened and the head of the threaded portion 25g is struck downward as shown in FIG. The handle 25 moves downward, and the washer 24 moves to the third position due to the inclination of the wedge surface 25b.
In the figure, it becomes possible to move in the left-right direction, and the rotating carton 20 is therefore released from the locked state.

The shoulders 25c and 25d have the function of restricting the movement of the handle 25.

A variation of the embodiment shown in FIGS. 1-3 is shown in FIG. In the embodiment shown in FIG. 3, the pusher 25 is pulled upward by its threaded portion 25g and pushes the washer 24 toward the rotating bowl 20, but in the modified example shown in FIG. The basic difference is that the cotter 25 is pushed upward by separate screw means 26. Specifically, the cavity 11d is the housing 11c.
It has an opening 11f on the upper side for receiving the clasp 25, and a screw hole 11e screwed into the screw means 26 on the lower side of the cavity 11d. The cotter 25 has a guide portion 25a in the upper part of FIG. 4, and a wedge surface 2 below the guide portion 25a.
5b, and further below the second guide portion 25f.
has. The screw means 26 is shown as a bolt threaded into a threaded hole 11e' in the lower side of the housing 11c. The method of using this modification will be obvious to those skilled in the art from the embodiments shown in FIGS. 1 to 3, so a description thereof will be omitted.

FIG. 5 shows a further modification in which a spring 25i is provided which always pushes the washer 24 in the direction of the rotating wheel 20 by the wedge surface 25b of the lever 25, and a lever means 28 is provided to release the spring 25i. To be more specific, the cavity 11d of the housing 11c has a large opening 11f on the lower side that receives the rod part 25 in FIG. . The bolt 25 is substantially similar to that shown in FIG. 3, except that the threaded portion 25g is formed as a simple rod portion 25g'. Rod part 25
g' has a spring support means 25h, and a compression coil spring 25i is wound around the rod portion 25g' and positioned between the spring support means 25h and the outer wall of the housing 11c. The compression coil spring 25i pulls up the handle 25 and rotates the washer 24.
It has enough force to push it in the direction of 0.
In order to push the stick 25 downward (as shown in FIG. 5) against the force of the compression coil spring 25i, the lever 2 is pressed.
8 is provided, which connects the housing 1 at one end.
It is pivotally supported 28a with respect to 1c. Thus, in this variant, the lever 25 is normally pulled upwardly by a compression coil spring 25i, and when the locking condition occurs it pushes the free end of the lever 28 downwards in FIG. The locked state will be released.

Effects As explained above and illustrated, according to the present invention, the rotating head can be easily released from the locked state without sacrificing the advantages of the screw type clamp having the rotating head, improving work efficiency. can be done.

[Brief explanation of the drawing]

1 is a front view of a clamp according to an embodiment of the present invention, FIG. 2 is a side view of the clamp of FIG. 1, FIG. 3 is a partial cross-sectional view taken along line 3-3 in FIG. 4 and 5 are partial cross-sectional views corresponding to FIG. 3 of another embodiment. Explanation of symbols, 10...Clamp, 11...Clamp body, 12...Shackle, S...Slot, 13...Threaded rod, 14...Spring, 15
...Sleeve member, 20...Rotating vessel, 21...
Cylindrical grip piece, 22...Ring, 23...Socket, 24...Washer, 25...Kotta, 26...
Washer, 27... Nut, 24a... Sliding surface,
25b... Cunei surface.

Claims (1)

[Claims for Utility Model Registration] A clamp of a type in which one of a pair of opposing legs forming a slot for receiving an article has a threaded rod, and the other has a rotating head having an eccentric cam surface that slides into contact with a washer. A housing is provided on the other leg portion of the washer on the opposite side of the rotating case, the washer is made thick and an inclined sliding surface is provided on the back surface of the washer that protrudes into the housing, and the washer is rotated. the washer is slidably guided in the direction of pushing the washer toward the slot and the direction of retracting the washer toward the housing; is provided, so that the above-mentioned cotter can slide on the sliding surface of the above-mentioned washer,
and having a wedge surface having an inclination equal to but opposite to the inclination of the sliding contact surface, and providing means for moving and fixing the cotter within the housing in a direction generally perpendicular to the sliding direction of the washer; The above-mentioned kettle usually holds the rotating cup in a position where it protrudes toward the slot side through a washer, and when the rotary cup is in a locked state, the potter can be moved to retract the washer toward the housing side. A rotating cup opening device for a screw-type clamp having a rotating cup, characterized in that: