JP5903721B1 - Thread corrector - Google Patents

Abstract

A screw capable of correcting a thread easily even when correcting a screw to be corrected having a large pitch and a large thread size without requiring technical skill and having a high thread correcting ability. Provide a mountain corrector. A screw thread correcting blade 8 having two shapes of a cutting edge 10 of a correcting blade 9 formed in the same straight line and having the same shape as a thread of the screw to be corrected, and a thread to be corrected, and a screw to be corrected And a contact means 3 that sandwiches the screw to be corrected with the screw thread correcting blade 8, and the screw thread correcting blade 8 or the contact means 3 is an axis orthogonal to the central axis of the screw to be corrected. The angle at which the screw thread correcting blade 8 meshes with the thread groove of the screw to be corrected can be adjusted in accordance with the lead angle of the screw to be corrected. A thread corrector characterized by being able to correct a damaged thread by rotating the thread corrector 1. [Selection] Figure 1

Description

  The present invention relates to a thread corrector that corrects a thread of a damaged screw close to the original thread.

  Some structures with members fixed with screws can be replaced by removing the screw alone, but there are also structures where the screw is integrated with the structure and cannot be replaced. . In a structure in which a single screw cannot be replaced, when a screw thread is damaged, a situation occurs in which the entire structure must be replaced even though the damaged portion is only the single screw.

  For this reason, there has been a demand for a thread corrector capable of correcting a damaged thread with a simple operation. For example, the screw thread corrector described in Patent Document 1 below is capable of screw thread correction in a state where a single screw is integrated with a structure, and has a plurality of blades that match the thread pitch of the screw to be corrected. The screw to be corrected is sandwiched between the blade and the guide roller, and the damaged screw thread is corrected while rotating the screw to be corrected or the screw thread corrector.

JP 2012-101278 A

However, when the actual machine was confirmed, the thread corrector of Patent Document 1 has a high correction capability when correcting a to-be-corrected screw having a small pitch and a small thread size, but the pitch is large and the thread When correcting a to-be-corrected screw having a large size, it becomes difficult to rotate if it is pinched strongly.
For this reason, when correcting the screw to be corrected having a large pitch and a large screw thread size with the screw thread corrector disclosed in Patent Document 1, while adjusting the pressure with which the screw to be repaired is adjusted according to the broken state of the thread. Since it is necessary to remove and correct the screw thread that is broken little by little, technical skill is required to correct the screw to be corrected with a large pitch and a large thread size with the thread corrector of Patent Document 1. Therefore, it was not that anyone could easily fix the screw.

  The present invention solves the conventional problems as described above, and when correcting a to-be-corrected screw having a large pitch and a large thread size, the screw thread correcting ability is high and technical skill is improved. It is an object of the present invention to provide a thread corrector capable of easily correcting a thread without requiring it.

  In the thread corrector disclosed in Patent Document 1, the thread correction blade is brought into contact with the center line of the screw to be corrected, and the cutting edges of the plurality of correction blades are orthogonal to the advancing direction due to the rotation of the screw. Therefore, the lead angle between the roots of the thread of the screw to be corrected was used to cut the damaged part as the cutting angle of the correction blade. However, if the pitch of the screw to be corrected is large and the lead angle is large, the cutting angle of the correction blade becomes deep. If it is too large, it is considered difficult to rotate because it becomes difficult to correct the damaged portion of the thread of the screw to be corrected having a large pitch and a large thread by simultaneously pressing a plurality of portions with a plurality of correction blades.

In order to achieve the above object, a thread correcting device according to the present invention includes a thread correcting blade having a correcting blade in which two points on the same straight line mesh with a thread groove of a screw to be corrected,
Abutting means that abuts the screw to be corrected and sandwiches the screw to be corrected with the thread correction blade;
The thread correction blade or the contact means is rotatable around an axis orthogonal to the center axis of the screw to be corrected,
It is characterized in that a damaged screw thread can be corrected by rotating a screw to be corrected or a screw thread corrector.

According to this configuration, when correcting the thread of the screw to be corrected with a large pitch and a large thread size, the screw thread correction having the correction blade in which two points on the same straight line engage with the thread groove of the screw to be corrected. With the blade, the damaged part of the thread of the screw to be corrected can be corrected one by one.
Rotate the screw to be corrected even if the screw to be corrected is clamped more strongly than when correcting the damaged part of the screw to be corrected, which has a large thread, by pressing multiple points simultaneously with multiple correction blades. Therefore, screw correction can be easily performed without requiring technical skill.

According to the present invention, the angle of the thread correction blade can be adjusted so that the correction blade meshes with the thread groove of the screw to be corrected at an angle that matches the lead of the screw to be corrected. As the thread correction of the large screw to be corrected becomes smooth,
Damage to the screw thread of the screw to be corrected whose thread size is large due to the side of the correction blade engaged with the screw groove of the screw thread correction blade that has a correction blade that meshes with the screw groove of the screw to be corrected. Since each part can be pushed back to its original position one by one and corrected by plastic deformation, the damaged part of the thread of the screw to be repaired, which has a large thread, can be simultaneously pushed through multiple correction blades to correct it. You will have more ability to correct than you do.
This makes it possible to rotate the screw to be corrected without difficulty even when fixing the screw with a large pitch and a large screw thread. Screw correction can be easily performed without the need.

The perspective view of the thread corrector which concerns on one Embodiment of this invention. The perspective view which shows the state which mounted | wore the to-be-corrected screw with the thread corrector shown in FIG. The side view of the thread corrector shown in FIG. FIG. 2 is a plan view of the thread corrector shown in FIG. 1. The side schematic diagram which shows the principal part at the time of the thread correction using the thread corrector shown in FIG. The front schematic diagram which shows the principal part at the time of the thread correction using the thread corrector shown in FIG. The perspective view of the thread corrector which has arrange | positioned the contact means side rotatably in one Embodiment of this invention.

Hereinafter, a thread corrector according to an embodiment of the present invention will be described with reference to the drawings. The thread corrector according to the present embodiment is attached to the screw to be corrected (a screw having a part of the thread damaged) and rotates the screw 15 or the thread corrector 1 while rotating the screw 15 to be corrected. Is a tool that corrects by bringing the screw closer to the original thread.
FIG. 1 is a perspective view of a thread corrector 1 according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a state in which a correction target screw 15 to be corrected is mounted on the thread corrector 1 of the present invention. 3 is a side view of the thread corrector 1 of the present invention, FIG. 4 is a plan view of the thread corrector 1 of the present invention, and FIG. 5 is a screw using the thread corrector 1 of the present invention. FIG. 6 is a schematic side view showing the main part at the time of thread correction, FIG. 6 is a schematic front view showing the main part at the time of thread correction using the screw thread corrector 1 of the present invention, and FIG. 7 is an embodiment of the present invention. It is a perspective view of the thread corrector which has arrange | positioned the contact means side so that rotation is possible.

As shown in FIG. 1, a guide roller 3, which is a means for contacting the screw to be corrected, is rotatably attached to the main body 2 via a shaft 4. The pressure adjusting screw 5 incorporated in the main body 2 is screwed to the main body 2 and the movable support piece 6 that can be rotated.
The built-in pressure adjusting screw 5 is integrated with the pressure adjusting knob 7, and a screw thread correcting blade 8 is fixed to the movable support piece 6 that can be rotated. In the present embodiment, the mounting screw 14 is fastened to the movable support piece 6 that can be rotated, and the thread correction blade 8 is fixed to the movable support piece 6 that can be rotated. Is possible.
By rotating the pressure adjustment knob 7 of FIG. 1, the pressure adjustment screw 5 incorporated therein is rotated. In accordance with this rotational direction, the movable support piece 6 that can rotate moves forward or backward while sliding, and the thread correction blade 8 that is integral with the movable support piece 6 that can rotate also moves back and forth linearly.
This makes it possible to adjust the distance between the thread correction blade 8 and the guide roller 3.

FIG. 2 is a perspective view showing a state in which the screw 15 to be corrected is mounted on the screw thread corrector 1.
The pressure to be adjusted by arranging the screw to be corrected 15 between the screw thread correcting blade 8 and the guide roller 3 in advance in a state where the distance between the screw thread correcting blade 8 and the guide roller 3 is larger than the diameter of the screw to be corrected 15. By rotating the knob 7, the screw to be corrected 15 is held in a state of being pressed by the screw thread correcting blade 8 and the guide roller 3, and the rotation fixing screw 13 is tightened to be integrated with the movable movable support piece 6. The angle of meshing with the thread groove of the thread 15 to be corrected of the thread correction blade 8 can be fixed.
The rotation fixing screw 13 screwed into the main body 2 fixes the movable support piece 6 that can be rotated during the correction operation of the correction target screw 15 so that the screw correction can be performed stably.
In this state, by rotating the to-be-corrected screw 15 or the thread corrector 1, the damaged portion 18 of the screw to be corrected 15 is corrected by the thread correcting blade 8.

FIG. 3 is a side view of the thread corrector 1 of the present invention, and FIG. 4 is a plan view of the thread corrector 1 of the present invention.
FIG. 5 is a schematic side view of the state where the screw 15 to be corrected is pressed by the guide roller 3 and the thread correction blade 8 in which two points of the cutting edge 10 of the correction blade 9 mesh with the thread groove of the screw 15 to be corrected on the same straight line. Show.
Even if the screw 15 to be corrected or the screw thread corrector 1 is rotated, the screw 15 to be corrected is always pressed by the two guide rollers 3 and the thread correction blade 8 arranged in the thread corrector 1. An angle at which the thread correction blade 8 integrated with the movable movable support piece 6 is in contact with the thread groove of the screw 15 to be corrected. Can be arbitrarily fixed by the rotation fixing screw 13, so that the cutting edge 10 of the screw correction blade 8 is matched with the lead angle of the thread groove between the threads of the correction screw 15 and fixed by the rotation fixing screw 13. It shows a state in which it is engaged in a valley between screw threads.
The screw 15 to be corrected is pressed by the two guide rollers 3 arranged on the thread corrector 1 and the thread correcting blade 8 so that the screw 15 to be corrected or the thread corrector 1 is rotated. The correction screw 15 is always stably maintained at a right angle with respect to the thread correction device 1, and the cutting edge 10 of the screw correction blade 8 is located at two points in the thread groove between the threads of the correction screw 15. Since it is formed in a meshing shape, even if one of the cutting edges 10 contacts the damaged portion 18 of the thread of the corrected screw 15, the thread groove of the other corrected screw 15 that is engaged at two points. Since the cutting edge 10 meshed with the screw serves as a guide, the cutting edge 10 on the side in contact with the damaged portion 18 of the thread of the screw 15 to be corrected can also maintain the angle corresponding to the lead angle of the original accurate thread groove. Thread of modified screw 15 deformed The damaged portion 18 is pushed back toward the original state by the side surface 12 of the correction blade 9 of the screw correction blade 8, and the damaged portion of the thread of the screw 15 to be corrected is corrected to the original position by plastic deformation. I can do it.

FIG. 6 is a front view of a state in which the screw 15 to be corrected is pressed by the guide roller 3 and the thread correction blade 8 in which two points of the cutting edge 10 of the correction blade 9 formed on the same straight line mesh with the thread groove of the screw 15 to be corrected. A schematic diagram is shown.
The screw 15 to be corrected is pressed by the two guide rollers 3 arranged on the screw thread corrector 1 and the thread correction blade 8 so that the screw thread is always stably corrected even when the screw 15 to be corrected is rotated. The thread correction blade 8 integral with the movable support piece 6 that is rotatable is maintained at a right angle with respect to the vessel 1, and the angle of the thread correction blade 8 that is in contact with the thread groove of the screw 15 to be corrected is an arbitrary rotation fixing screw. 13 shows a state in which the cutting edge 10 of the screw correcting blade 9 is fixed in accordance with the lead angle of the thread groove between the threads of the screw 15 to be corrected and is engaged with the valley between the threads of the screw 15 to be corrected. Yes.
The screw thread correcting blade 8 integrated with the movable movable support piece 6 engages with the thread groove of the screw to be corrected 15 when correcting the thread of the screw to be corrected 15 having a large pitch and a large thread size. By the side face 12 of the correction blade 9, the damaged portion of the screw 15 to be corrected, in which the damaged portion 18 is formed in a plurality of screw threads, can be corrected by pushing back to the original position by plastic deformation one by one. Therefore, since the screw to be corrected 15 can be rotated more easily than the case where a plurality of correction blades are used to simultaneously correct a damaged portion of the screw to be corrected 15 with a large thread, the pitch is large. The correction of the screw thread of the screw to be corrected having a large screw thread size becomes smoother and the correction capability is enhanced.

  FIG. 7 is a perspective view of a thread corrector in which two guide rollers 3 that are contact means in one embodiment of the present invention are arranged on a movable support piece 6 that can be rotated, and is fixed to the main body 2. The two guide rollers 3 are integrated with a rotatable moving support piece 6 with respect to the thread correction blade 8, and the rotatable movable support piece 6 moves forward or backward while sliding, and is rotatable. The two guide rollers 3 integrated with the moving support piece 6 also move back and forth linearly. This makes it possible to adjust the distance between the thread correction blade 8 and the guide roller 3.

  Although the embodiment has been described in detail above, the present invention is not limited to such an embodiment, and the configuration, shape, arrangement, material, etc. of the details are arbitrarily changed without departing from the gist of the present invention. it can.

1 Thread corrector 2 Body 3 Guide roller (contact means)
4 Axis 5 Pressure adjusting screw 6 Moving support piece 7 Pressure adjusting knob 8 Thread correcting blade 9 Correcting blade 10 Cutting edge 11 Mounting screw 12 Correcting blade side surface 13 Rotation fixing screw 14 Mounting screw 15 Corrected screw 16 Corrected screw thread Nose bottom 17 Thread of the screw to be corrected (outer circumference)
18 Damaged part of the screw to be corrected 19 Center line of the screw to be corrected

Claims (2)

A thread corrector for correcting the thread of a damaged screw,
A thread correction blade having a correction blade meshing with the thread groove of the screw to be corrected;
Abutting means for abutting the screw to be corrected and sandwiching the screw to be corrected with the thread correction blade;
The screw thread correcting blade or the abutting means is fixed to a rotatable moving support piece that moves in a direction to sandwich the screw to be corrected, and the rotatable moving support piece is connected to the central axis of the screw to be corrected. It can be rotated around an axis that intersects at right angles ,
A screw thread corrector characterized in that a damaged thread can be corrected by rotating the screw to be corrected or the thread corrector.   The thread correction blade is the thread correction blade having the correction blade whose two points on the same straight line mesh with the thread groove of the screw to be corrected, and is detachable from the thread correction device. The thread corrector according to 1.

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