JP3606802B2 - Swing coupler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a swing coupling device comprising a shackle, a support body configured to be capable of being screwed to an attachment target, and a swing support mechanism that swings the shackle with respect to the support body. Specifically, the present invention relates to a technique for increasing the support strength of the shackle to the support body.
[0002]
[Prior art]
As shown in FIGS. 4 and 5, the conventional oscillating connector A is externally fitted to a boss member 1 that can be bolted to an attachment target 6 and a boss member 1 composed of these two parts so as to be relatively rotatable. The support ring 2 and a U-shaped shackle 3 that is swingably supported with respect to the support ring 2 are included. A pair of connecting bolts 4, 4 are provided to be screwed to the support ring 2 through holes 3 a formed in the pair of legs 3 A, 3 A of the shackle 3, and the connecting bolts 4, 4 are pinned to the support ring 2. By fixing, a swing support mechanism having a horizontal axis Y was configured.
[0003]
In other words, the shackle 3 is swingably supported by the support body 18 composed of the boss member 1 and the support ring 2, so that the shackle 3 swings following the inclination in the tensile load direction acting on the attachment target. Therefore, a large bending moment due to the inclination in the load direction is less likely to act, and the load resistance as a coupling tool can be increased. Incidentally, the support ring 2 is also rotatable about the longitudinal axis X with respect to the boss member 1.
[0004]
[Problems to be solved by the invention]
In the swing coupling tool according to the prior art, the threaded portion 4a of the connecting bolt 4 is formed from the support ring 2 to the position where it travels to the shackle 3 side, in order to allow the shackle 3 to swing and move with little play in the axial direction. Thus, the shearing force due to the load applied to the connecting bolt 4 via the shackle 3 is to act on the screw portion 4a. Since a shearing force acts on the screw part in which a crack-shaped screw groove is formed in advance in the cross section, it is disadvantageous in terms of load resistance, and an expensive material with excellent strength is required to compensate for the disadvantage. There was room for improvement.
[0005]
An object of the present invention is to provide a rocking coupler that can improve the bearing capacity of a shackle by shearing and can easily increase the load resistance.
[0006]
[Means for Solving the Problems]
〔Constitution〕
The configuration of claim 1, FIG. 1, as illustrated in FIG. 2, the shackle 5, a support body 19 which threadedly child stopped with mounting bolts is configured to be a mounting object 6, a shackle 5 relative to the support body 19 And a swing coupling device including a swing support mechanism 8 that swingably supports
A C-ring that engages between an inner peripheral portion of a bolt hole through which the mounting bolt is inserted in the support body and a bolt shaft portion of the mounting bolt is provided, and the swing support mechanism 8 is connected to a pair of leg portions of the shackle 5. The connecting hole 15 formed in each of 5a and 5a is fitted to a pair of shaft portions 14 and 14 formed integrally with the support body 19 in a state having a smooth outer peripheral surface, and the leg portion 5a. And a pair of shaft portions of the support body are inserted into the bolt holes and screwed to the mounting object, and the diameter of the mounting bolt is increased. It forms so that it may be located in the said attachment object side from a part .
[0007]
1 and 2, the shackle 5 is arranged around the axis X perpendicular to the swing axis Y of the shackle 5 by the swing support mechanism 8 in the configuration of the first embodiment. A rotation support mechanism 9 that supports the support main body 19 so as to freely rotate is provided.
[0008]
In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry.
[0009]
[Action]
According to the configuration of the first aspect, since the shaft portion integrally formed with the support body in a state having a smooth outer peripheral surface is fitted into the connecting hole of the shackle leg portion, the shackle is interposed through the shackle. The part receiving the shearing force acting on the shaft part has no unevenness like the screw part, and has a smooth outer peripheral surface, which makes it possible to improve the shearing resistance. In addition, there are the following effects.
[0010]
For example, there is a problem that the means for providing a pin shaft inserted into a retaining state in place of the connecting bolt in the conventional structure cannot completely eliminate the possibility of the pin shaft being separated from the support body. On the other hand, the present invention in which the shaft portion is integrally formed on the support body is preferable in that the shaft portion is not likely to be detached from the support body. In addition, in the structure in which the connecting bolt and pin shaft are mounted, there is a backlash between these and the support body side, that is, there is often a slight gap, so the impact load or bending moment acts and the limit load is applied. However, in the structure of this claim, it is also preferable that such a risk does not occur at first.
[0011]
According to the configuration of the second aspect, since the shackle is rotatably supported with respect to the support body around the shaft center orthogonal to the shaft shaft of the shackle by the rocking support mechanism, It can follow the inclination of the load direction and can also follow the inclination about the axis that is perpendicular to the axis about the inclination, so it can handle all three-dimensional directions, and no excessive bending moment acts on the shackle. Can be.
[0012]
〔effect〕
In the oscillating connector according to claim 1, the anti-shearing force of the shaft portion is improved by fitting the hole of the shackle leg portion to the shaft portion integrally formed with the support body to prevent the shaft portion from coming off, Since the bending load and impact load do not act first, the load limit is improved and the reliability is improved.
[0013]
In the swing coupling tool according to claim 2, the shackle is supported in a swingable and pivotable manner with respect to the support body, and the shackle can be adapted to any pulling direction. There is an advantage that it is more convenient to use.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show the swing coupling tool B in the assembled state, and FIG. 3 shows an exploded perspective view. The swing connector B includes a shackle 5, a boss member 7 that can be screwed to the attachment target 6, and a swing support mechanism 8 that supports the shackle 5 with respect to the boss member 7 in a swingable manner. The shackle 5 is provided with a rotation support mechanism 9 that rotatably supports the boss member 7.
[0015]
The boss member 7 is constituted by a press-fit fitting connection between a flange-shaped lower boss 7A with a bolt hole 7a and a lid-shaped upper boss 7B with a bolt hole 7b, and an upper end portion of the bolt hole 7a of the lower boss 7A. A C-ring relief 10 is formed on the surface. A mounting bolt 11 that can be screwed to the mounting target 6 is installed through both bolt holes 7a and 7b, and the C-ring 12 that is externally fitted to the shaft portion 11a is positioned at the C-ring relief 10 described above. doing.
[0016]
A ring-shaped trunnion 13 is fitted to the boss member 7 so as to be rotatable about a longitudinal axis X along the axial direction of the mounting bolt 11, and a pair of shaft portions 14, 14 integrally formed with the trunnion 13. In addition, by connecting fitting holes 15, 15 formed in the pair of legs 5 a, 5 a of the shackle 5, a horizontal axis perpendicular to the vertical axis X (an example of a swing axis) around Y Thus, a swing support mechanism 8 that can swing the shackle 5 is configured. The shaft portion 14 has no smooth irregularities such as a screw portion or a snap ring mounting groove, and is formed in a state having a smooth outer peripheral surface.
[0017]
The rotation support mechanism 9 is configured by fitting the trunnion 13 and the boss member 7, and the trunnion 13, that is, the shackle 5 with respect to the boss member 7, is a vertical axis (axis perpendicular to the swing axis Y). An example of a heart) It is supported so as to be rotatable around X. The boss member 7 and the trunnion 13 form a support body 19, and the shaft portion 14 is formed integrally with the support body 19.
[0018]
The inverted U-shaped shackle 5 is formed by bending the straight shackle double-headed rod 5R shown in FIG. 3 hot (or at room temperature), and the connecting hole 15 is bent during the bending. A step of fitting the shaft portion 14 to the shaft portion 14 is also performed. In other words, the shackle 5 is fitted to the shaft portions 14 and 14 so as to be fitted and normally does not come out, but the shackle 5 may be opened and deformed due to a considerable tensile load acting on the shackle 5 or the like. is there. Therefore, a means s for preventing the leg portion 5a from being pulled out from the shaft portion 14 is provided by providing a washer 17 secured to the screw 16 in a screw hole 14a formed in the shaft portion 14.
[0019]
Since the innermost part of the screw hole 14a and its pilot hole does not reach the base end of the shaft part 14, the screw hole 14a and the pilot hole are not attached to the base part of the shaft part 14 that receives a shearing force due to the load from the shackle 5. The cross-sectional area is avoided from being reduced, and this also contributes to increasing the shearing force.
[0020]
[Another embodiment]
Although not shown in the drawings, a swinging body that is configured so that only the swinging movement of the shackle 5 around the horizontal axis Y is provided by providing a support body 20 having a shape such that the boss member 7 and the trunnion 13 are integrated. The connector B may be used. Further, the withdrawal prevention means s may be configured by a shaft exterior type snap ring such as an E-ring equipped on the shaft portion 14 so that the leg portion 5a is pulled out from the shaft portion 14.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a rocking coupler. FIG. 2 is a side view of the rocking coupler. FIG. 3 is an exploded perspective view of a rocking coupler. FIG. 5 is a partially cutaway plan view of the swing coupling shown in FIG.
5 Shackle 5a Leg 6 Attachment object 8 Oscillation support mechanism 9 Rotation support mechanism 14 Shaft part 15 Connection hole 19 Support body s Means for preventing removal Y Oscillation axis X axis

Claims (2)

A shackle, a support body which screw element stop is configured to be the mounting bolt to a mounting target, in the swing coupler that includes a swing support mechanism for supporting the shackle pivotably to the support body There,
A C-ring that engages between an inner peripheral portion of a bolt hole through which the mounting bolt is inserted in the support body and a bolt shaft portion of the mounting bolt is provided, and the swing support mechanism is connected to a pair of leg portions of the shackle. The connecting hole formed in each and a pair of shaft portions formed integrally with the support body in a state having a smooth outer peripheral surface are fitted, and the leg portion is extracted from the shaft portion. And a pair of shaft portions of the support main body are positioned closer to the attachment object than the diameter-enlarged head of the attachment bolt that is inserted into the bolt hole and screwed to the attachment object. A swing coupling formed to do so. The rotation support mechanism which supports the said shackle rotatably with respect to the said support main body around the axis center orthogonal to the swing axis of the said shackle by the said rocking | fluctuation support mechanism is provided. Swing coupler.

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