JP6377658B2 - Insertion jig for embedded nuts - Google Patents

Description

  The present invention relates to an insertion jig that is mounted on an electric screwdriver device or the like for embedding and fixing an outer diameter screw type embedded nut used for strengthening or correcting a screw hole of a light alloy / mold product or the like.

Conventionally, embedment of an outer diameter screw type embedded nut is carried out by holding the outer diameter screw type embedded nut on the guide screw with which the insertion jig abuts and embedding it in the work piece, and caulking or bonding the embedded mouth. After fixing, the guide screw was pulled out.
And, as a lock mechanism for fixing the outer diameter screw type embedded nut to the guide screw of the insertion jig, conventionally, there is only a butting type or a lock nut method, and the outer diameter screw type embedded nut is locked to the insertion jig. There is a problem in that the outer diameter screw type embedded nut is often pulled back from the workpiece without being unlocked.
Therefore, an insertion jig is provided that can be unlocked without being pulled out after the outer diameter screw type embedded nut is embedded and fixed in the workpiece.

  For example, the guide screw of the locking slide part of the embedding jig is separated from the slide part so that it has a play of about a quarter of a turn in the rotation direction and the play can be made about 1 mm when unlocking in the axial direction. By inserting the coupling mechanism, when rotating the guide shaft and lock slide outer diameter knob, the insertion jig ensures the locking or unlocking of the jig to the embedded nut by preceding the rotation of the outer diameter knob. Is provided (see Patent Document 1).

Utility Model Registration No. 3108102

However, although the insertion jig according to the device described in Patent Document 1 allows the unlocking without pulling out the outer diameter screw type embedded nut, the locking operation and the unlocking are performed manually, and the parts There is a problem in that the number of points is large and the production takes time and cost.
Therefore, the present invention can be automated by mounting the outer diameter screw type embedded nut on the electric screwdriver device or the like after the outer diameter screw type embedded nut is locked, without removing the outer diameter screw type embedded nut. An object of the present invention is to provide an insertion jig for an outer diameter screw type embedded nut that is easy and can be manufactured at low cost.

  In order to solve the above-mentioned problems, an invention according to claim 1 is an insertion jig for an outer diameter screw type embedded nut comprising a guide shaft, a slide upper portion, a slide lower portion, and a locking screw, wherein the guide shaft A first male screw for holding an outer diameter screw type embedded nut at a lower end of the first shaft, and a first male screw in a direction opposite to the first male screw for screwing with the locking screw in the middle of the guide shaft. 2 male threads are formed, the lower slide part and the upper slide part are screwed together while containing the locking screw, and an engaging convex part is formed at the lower end of the locking screw, The outer-diameter embedded nut held by the first male screw is engaged with an engaging recess formed at the upper end of the lower slide, and is locked to the workpiece by rotating the guide shaft. And then the guy Characterized by releasing the lock without returning disconnect the outer diameter screw-type anchor nuts by rotating the shaft in reverse.

  According to a second aspect of the present invention, the locking screw is formed in a substantially cylindrical shape so that the guide shaft can be inserted therethrough, and the engaging convex portions are downwardly spaced at intervals of 180 degrees on the circumference of the lower end of the locking screw. The engagement convex portion has a semicircular lower end.

  According to a third aspect of the present invention, the upper portion of the lower portion of the slide is formed in a substantially short cylindrical shape, and the engagement concave portions are formed in two arcs at equal intervals on the circumference of the upper end of the lower portion of the slide. It is characterized by that.

  The invention according to claim 4 is characterized in that a central angle of the engaging recess is approximately 90 degrees.

  According to a fifth aspect of the present invention, the engagement concave portion has a first vertical surface, a first horizontal surface, an upward inclined surface, a second horizontal surface, an upward curved surface and a second surface in a rotational direction in which the engagement recess is tightened. It is characterized by comprising a vertical plane.

  The invention according to claim 6 is characterized in that the total length in the circumferential direction of the second horizontal plane and the curved surface is the same as the length in the circumferential direction of the engaging convex portion.

First, an engagement concave portion for engaging with an engagement convex portion of a locking screw is formed at the upper end of the slide lower portion, and the engagement concave portion is a first vertical surface in the direction of tightening, the first Since it is composed of a horizontal surface, an upward inclined surface, a second horizontal surface, an upward curved surface and a second vertical surface, after locking the outer diameter screw type embedded nut on the workpiece, and after locking Rotating the guide shaft in the reverse direction to unlock it is easier and more reliable, improving the workability and reliability related to embedment fixing of the outer diameter screw type embedded nut to the workpiece, electric driver device etc. It is possible to automate the embedment and fixing of the outer diameter screw type embedded nut to the workpiece.
Second, the outer diameter screw type embedded nut insertion jig according to the present invention is composed of four parts: a guide shaft, a slide lower part, a slide upper part, and a lock screw. It is easy and can be manufactured at low cost.

It is explanatory drawing of the insertion jig for external diameter screw type embedding nuts. It is explanatory drawing of the insertion jig for external diameter screw type embedding nuts of the state which removed the slide upper part. It is a front view of the slide lower part of the insertion jig for external diameter screw type embedding nuts. It is a perspective view of the slide lower part of the outer diameter thread type embedded nut insertion jig.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory view of the structure of the outer diameter screw type embedded nut insertion jig of the present embodiment, and FIG. 2 is an explanatory view of the outer diameter screw type embedded nut insertion jig with the slide upper part removed. .
The insertion jig for the outer diameter screw type embedded nut in the present embodiment is composed of four parts: a guide shaft 10, a slide upper part 30, a slide lower part 20, and a locking screw 40. The slide lower portion 20 and the slide upper portion 30 are screwed and joined while containing the locking screw 40. Further, an engaging convex portion 41 is formed at the lower end of the locking screw 40 and is configured to engage with an engaging concave portion 22 formed at the upper end of the slide lower portion 20. Then, the upper end portion of the guide shaft 10 is attached to an electric driver device or the like.

The structure of the outer diameter screw type embedded nut insertion jig of the present embodiment will be described in more detail.
A first male screw 11 is formed at the lower end of the guide shaft 10 to hold an outer diameter screw-type embedded nut that is embedded and fixed to the workpiece, and a locking screw 40 is screwed into the middle of the guide shaft 10. For this purpose, a second male screw is formed in the opposite direction to the first male screw 11.
Then, the outer diameter screw type embedded nut held by the first male screw 11 is locked to a workpiece such as a light alloy / mold product by rotating the guide shaft 10, and then the guide shaft 10 is rotated in reverse. By doing so, the action of the first male screw 11 and the second male screw causes a force to separate the embedded outer diameter screw type embedded nut and the lock surface 21 and releases the lock without pulling out the outer diameter screw type embedded nut. To do. The first male screw 11 and the second male screw may have the same lead angle, but the pitch of the screws is different, and the effective diameter is that of the second male screw so that the screw can be cut. The effective diameter is larger than the effective diameter of the first male screw 11.

The lower end of the substantially cylindrical slide upper portion 30 is opened and screwed to the slide lower portion 20 that slides on the guide shaft 10, and the upper end of the slide upper portion 30 is closed. A through hole through which the guide shaft 10 can freely rotate is formed. The slide upper portion 30 is coupled to the slide lower portion 20 by screwing, and is configured to include a locking screw 40 therein, and the second male screw of the guide shaft 10 and the engaging protrusion of the locking screw 40 are engaged. The movement of the guide shaft 10 is transmitted by the portion 41 and the engagement recess 22 of the slide lower portion 20.
The lower end of the slide lower part 20 is a lock surface 21 for locking the outer diameter screw type embedded nut, and the first male at the lower end of the guide shaft 10 is rotated by rotating in the same direction as the guide shaft 10. The outer diameter screw type embedded nut held by the screw 11 is locked to the workpiece at the holding position, and the guide shaft 10 rotates in the opposite direction to the locked state after being locked. Unlock without pulling back.
Note that the maximum outer diameter of the slide lower portion 20 and the slide upper portion 30 is formed so as not to be larger than that of the guide shaft 10 so as to reduce blurring during rotation when mounted on an electric screwdriver device or the like. ing. Further, if the lower end portion of the slide lower portion 20 is thick, it becomes difficult to insert the outer diameter screw type embedded nut into the corner portion of the workpiece, and therefore, the outer diameter of the lower end of the slide lower portion 20 is not increased. . A portion from the maximum outer diameter portion to the minimum outer diameter portion of the slide lower portion 20 is formed in a truncated cone shape in order to maintain the strength as much as possible. Moreover, the maximum outer diameter of the slide lower part 20 and the slide upper part is the same.

  The locking screw 40 is substantially cylindrical and is formed so that the guide shaft 10 can be inserted therethrough. On the circumference of the lower end of the locking screw 40, two engaging projections 41 are formed downward at intervals of 180 degrees. The engaging convex portion 41 has a semicircular lower end.

FIG. 3 is a front view of the slide lower portion 20 of the outer diameter screw type embedded nut insertion jig, and FIG. 4 is a perspective view of the slide lower portion 20 of the outer diameter screw type embedded nut insertion jig.
The slide lower portion 20 is formed such that the guide shaft 10 can be inserted through the center thereof, and an external thread is formed on the outer peripheral surface of the lower portion of the engagement recess 22, and the inner peripheral surface of the lower portion of the slide upper portion 30. And screwed into the female screw formed on.
The upper portion of the slide lower portion 20 is formed in a substantially short cylindrical shape, and two engaging recesses 22 are formed in an arc shape at equal intervals on the circumference of the upper end of the slide lower portion 20. The center angle when the circumferential length of the engagement recess 22 is an arc and the axis is the center is approximately 90 degrees. Then, when the engaging convex portion 41 and the engaging concave portion 22 are engaged, the movements of the guide shaft 10 and the locking screw 40 are transmitted to the slide lower portion 20 and the slide upper portion 30.
In order to ensure that the lock can be released without pulling out the outer diameter threaded embedded nut after locking and locking, the engagement recess 22 is formed in order of the first vertical surface 23, the first A horizontal plane 24, an upward inclined surface 25, a second horizontal plane 26, an upward quarter-circular curved surface 27, and a second vertical surface 28 are formed. The total length in the circumferential direction of the second horizontal surface 26 and the curved surface 27 is the same as the length in the circumferential direction of the engagement convex portion 41.

Before starting tightening, the engaging convex portion 41 is positioned at the first horizontal surface 24 in the engaging concave portion 22, but the guide shaft 10 is rotated to start tightening the outer diameter screw type embedded nut to the workpiece. And slide away from the first horizontal surface 24 while abutting against the inclined surface 25 and then the second horizontal surface 26, and abutting against the second vertical surface 28 to completely attach the outer diameter screw type embedded nut to the workpiece. Lock in place. Further, the engaging convex portion 41 smoothly slides up in the engaging concave portion 22 when trying to lock, and smoothly moves in the engaging concave portion 22 when releasing the lock and trying to remove it from the outer diameter threaded embedded nut. The lower end of the engaging protrusion 41 is formed in a semicircular shape so as to slide down. The portion of the first horizontal surface 24 in the engagement recess 22 is embedded with the outer diameter screw type embedded nut insertion jig before and after the outer diameter screw type embedded nut is started to be fastened to the workpiece. This is a portion where the engaging convex portion 41 is located after being extracted from the nut.
After the lock, the outer diameter threaded embedded nut remains fixed to the workpiece, and the guide shaft is used to release the lock and remove only the outer diameter threaded embedded nut from the outer diameter threaded embedded nut. When 10 is rotated in the opposite direction to the locked state, the engaging convex part 41 moves away from the second vertical surface 28 in the engaging concave part 22 and slides down while contacting the second horizontal surface 26 and then the inclined surface 25. , It is again positioned at the portion of the first horizontal plane 24.

  By mounting the outer diameter screw type embedded nut insertion jig according to the present invention on an electric screwdriver device or the like, embedding, locking work and unlocking of the outer diameter screw type embedded nut can be automated. Moreover, this outer diameter screw type embedded nut insertion jig has a small number of parts, is easy to assemble, and can be manufactured at low cost.

10 Guide shaft 11 First male screw 20 Lower slide portion 21 Lock surface 22 Engaging recess 23 First vertical surface 24 First horizontal surface 25 Inclined surface 26 Second horizontal surface 27 Curved surface 28 Second vertical surface 30 Upper slide portion 40 Locking screw 41 Engaging projection

Claims (5)

An insertion jig for an outer diameter screw type embedded nut composed of a guide shaft, a slide upper part, a slide lower part, and a locking screw,
The lower end of the guide shaft has a first male screw for holding an outer diameter screw type embedded nut, and the middle of the guide shaft is opposite to the first male screw for screwing with the locking screw. A second male thread in the direction is formed,
The upper part of the lower part of the slide is formed in a substantially short cylindrical shape, and the engagement recesses are formed in two arcs at equal intervals on the circumference of the upper end of the lower part of the slide,
The slide lower part and the slide upper part are screwed together while containing the locking screw,
An engagement convex portion is formed at the lower end of the locking screw, and is configured to engage with an engagement concave portion formed at the upper end of the slide lower portion.
The outer diameter screw type embedded nut held by the first male screw is locked to the workpiece by rotating the guide shaft, and then the outer diameter screw type embedded nut is rotated by rotating the guide shaft in reverse. An insertion jig for an outer diameter screw type embedded nut, wherein the lock is released without removing the nut.
The locking screw is formed in a substantially cylindrical shape so that the guide shaft can be inserted therethrough, and the engagement convex portions are formed at two positions downward at intervals of 180 degrees on the circumference of the lower end of the locking screw, The insertion jig for an outer diameter screw type embedded nut according to claim 1, wherein the engagement convex portion has a semicircular lower end.
The insertion jig for an outer diameter screw type embedded nut according to claim 1 or 2 , wherein a central angle of the engaging recess is approximately 90 degrees.
The engaging recess is composed of a first vertical surface, a first horizontal surface, an upward inclined surface, a second horizontal surface, an upward curved surface and a second vertical surface in the rotational direction to be tightened. The insertion jig for an outer diameter screw type embedded nut according to any one of claims 1 to 3 .
5. The outer diameter threaded embedded nut according to claim 4 , wherein a total length in a circumferential direction of the second horizontal plane and the curved surface is the same as a length in a circumferential direction of the engagement convex portion. Insertion jig.

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