JP2016150388A - Screw thread corrector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw thread corrector which has a high ability to correct screw threads and allows easy correction of the screw thread, even when a screw to be corrected which has a large pitch and a large screw thread is subjected to correction, without requiring technical skill.SOLUTION: A screw thread corrector 9 is obtained by rotatably and displaceably combining two screw thread correctors as one set. A damage part 20 of a screw thread of a screw 14 to be corrected can be corrected to an original position by: meshing all the four points of correction blades 22 of screw thread correction blades integrally provided in the screw thread corrector 9 with screw grooves in a valley of the screw 14 to be corrected by sandwiching both sides of the screw 14 to be corrected with the screw thread corrector 9; fixing a position and angle of the screw thread corrector 9 relative to the screw 14 to be corrected with an angle fixing nut 11; and then pushing back and plastically deforming the damage part 20 with side surface parts of the correction blades 22 of the screw thread correction blades meshed with screw grooves on both sides of the screw 14 to be corrected by rotating the screw 14 to be corrected or the screw thread corrector 9.SELECTED DRAWING: Figure 2

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. An object of the present invention is 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 much, it will be difficult to rotate because it will be difficult to correct the damaged part of the thread of the screw to be corrected, which has a large pitch and a large thread, with multiple correction blades at the same time. .

  In order to achieve the above-mentioned object, a thread corrector according to the present invention is a correction blade having the same cross-sectional shape as between threads, a thread correction blade in which two points on the same straight line mesh with a thread groove of a screw to be corrected, and a thread Two screw thread correctors with corrector combination bolts integrated with the main body are combined into each other's thread corrector in a long hole that is formed in the shape of a fan for the thread corrector combination formed in the main body and penetrated. Pass the bolts and fix the two thread correctors in place and angle with the pressure adjustment nut and angle fixing nut. As a set of thread correctors, all four points of the cutting edge engaged with the thread groove of the thread to be corrected of the thread correcting blade provided on the thread corrector on both sides are positioned and angled to match the lead angle of the thread groove. Fixed in the axial direction perpendicular to the center axis of the screw to be corrected Therefore, when correcting the thread of the screw to be corrected with a large pitch and a large screw thread, the damaged part of the screw thread of the screw to be corrected is used as the screw groove of the screw to be corrected of the screw thread. It is characterized in that the damaged portion of the screw thread of the screw to be corrected can be corrected by plastic deformation to the original position one by one by pushing back by the side portion of the meshing correction blade.

じ山を修正できるので、ねじ山の大きさが大きい被修正ねじのねじ山の破損部分を複数の修正刃で複数個所同時に押し切って修正する場合よりも、被修正ねじを強く挟んでも被修正ねじを無理なく回すことができるので、技術的な熟練を要することなく容易にねじ修正を行うことができる。According to the present invention, the four points of the correction blade meshed with the thread groove of the screw to be corrected of the thread correction blade provided in both screw thread correction devices as a set of thread correction devices. All can be fixed in the axial direction perpendicular to the central axis of the screw to be corrected at a position and angle that matches the lead angle of the screw groove on both sides of the screw to be corrected, so that the thread can be corrected smoothly and the pitch The side of the correction blade that meshes with the thread groove of the screw of the thread correction blade that is integrated with the thread corrector on both sides, even when correcting the thread of the correction screw that has a large thread size. Damage to the thread of the screw to be corrected

Since the thread can be corrected, the screw to be corrected can be fixed even if the screw to be corrected is sandwiched more strongly than the case where the damaged part of the thread of the screw to be corrected, which has a large thread size, is pressed and corrected simultaneously with multiple correction blades. Therefore, the screw can be easily corrected without requiring technical skill.

図３に示した第一実施形態のねじ山修正器一台の正面図。 図４に示した第一実施形態のねじ山修正器一台の左側面図。 第一実施形態のねじ山修正刃の斜視図。 図２に示した第一実施形態の二台を一組に組み合わせたねじ山修正器を用いたねじ山修正時の要部を示す正面概略図。 図２に示した第一実施形態の二台を一組に組み合わせたねじ山修正器を用いたねじ山修正時の要部を示す側面概略図。 第二実施形態の二台を一組に組み合わせたねじ山修正器の斜視図。 第二実施形態の二台を一組に組み合わせたねじ山修正器の正面図。 The perspective view of the thread corrector which combined two units of 1st embodiment into 1 set. The perspective view which shows the state which attached the to-be-corrected screw to the screw thread correction device which combined two sets of 1st Embodiment shown in FIG. 1 into 1 set.

The front view of one screw thread corrector of 1st embodiment shown in FIG. The left view of one screw thread corrector of 1st embodiment shown in FIG. The perspective view of the screw thread correction blade of 1st embodiment. The front schematic diagram which shows the principal part at the time of thread correction using the thread corrector which combined two units | sets of 1st Embodiment shown in FIG. 2 into 1 set. The side surface schematic diagram which shows the principal part at the time of the thread correction using the thread corrector which combined two units | sets of 1st Embodiment shown in FIG. 2 into 1 set. The perspective view of the thread corrector which combined two units of 2nd embodiment into 1 set. The front view of the thread corrector which combined two units | sets of 2nd embodiment into 1 set.

形態のねじ山修正器９の正面図、図４は、図３に示した第一実施形態の第１のねじ山修正器１の正面図、図５は、図４に示した第一実施形態の第１のねじ山修正器１の左側面図、図６は、第一実施形態のねじ山修正刃の斜視図、図７は、図２に示した二台を一組に組み合わせたねじ山修正器９を用いた第一実施形態のねじ山修正器を用いたねじ山修正時の要部を示す正面概略図、図８は、図２に示した二台を一組に組み合わせたねじ山修正器９を用いた第一実施形態のねじ山修正器を用いたねじ山修正時の要部を示す側面概略図、図９は第二実施形態の二台を一組に組み合わせたねじ山修正器の斜視図、図１０は第二実施形態の二台を一組に組み合わせたねじ山修正器の正面図である。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 embodiment is provided with a corrected screw 14 (a screw in which a part of the thread is damaged), and rotates the corrected screw 14 or a thread corrector 9 that is a combination of two units. However, it is an instrument that corrects the thread of a damaged screw close to the original thread. FIG. 1 is a perspective view of a thread corrector 9 in which two units of the first embodiment are combined as a set, and FIG. 2 is a thread of combination of two units in the first embodiment shown in FIG. FIG. 3 is a perspective view showing a state in which the corrector screw 14 is attached to the corrector 9, and FIG.

FIG. 4 is a front view of the first thread corrector 1 of the first embodiment shown in FIG. 3, and FIG. 5 is the first embodiment shown in FIG. FIG. 6 is a perspective view of the screw thread correcting blade of the first embodiment, and FIG. 7 is a screw thread obtained by combining the two units shown in FIG. FIG. 8 is a schematic front view showing a main part at the time of screw thread correction using the screw thread corrector of the first embodiment using the corrector 9, and FIG. 8 is a screw thread obtained by combining the two units shown in FIG. FIG. 9 is a schematic side view showing a main part at the time of screw thread correction using the screw thread corrector of the first embodiment using the corrector 9, and FIG. 9 is a screw thread correction combining the two units of the second embodiment as a set. FIG. 10 is a front view of a thread corrector in which two units of the second embodiment are combined in one set.

As shown in FIG. 4, in the first thread corrector 1, two points of the correction blade 22 formed on the same straight line with the same cross-sectional shape as the thread groove between the threads are the screw of the screw 14 to be corrected. The first thread correction blade 3 that meshes with the groove is integrally combined with the first thread corrector 1 with two mounting bolts 13, and the first thread corrector combination bolt 5 is the first The screw thread corrector 1 is integrally provided with the first thread corrector 1 by being screwed into the main body through a screw hole provided in the thread corrector 1 and fixed with a lock nut 12.
As shown in FIG. 5, on the center line 15 in the thickness direction of the first thread correction blade 3 of the first thread corrector 1, the first thread corrector combination bolt 5 and the screw A first thread corrector combination oblong hole 7 through which a thread corrector combination bolt for the combination of two thread correctors passes through the thread correcting blade is passed through the first thread thread. It is formed in a fan shape from the center point of the corrector combination bolt 5.

  As shown in FIG. 3, the two screw thread correctors include a screw thread corrector combination bolt integrally formed with each other's body, and a fan-shaped through hole for the thread corrector combination. By being combined by the pressure adjusting nut 10 and being fixed by the angle fixing nut 11, it functions as a screw thread corrector 9 in which two units are combined in one set.

のすべてが同時にでき、被修正ねじ１４は両方のねじ山修正器と一体のねじ山修正刃の二枚の、被修正ねじのねじ溝に噛み合う四点によって押圧された状態で保持される。
さらに角度固定ナット１１を締めることで、二台両方のねじ山修正器の位置と角度を固定すれば、二台を一組に組み合わせたねじ山修正器９は圧力調整ナット１０と角度固定ナット１１により押圧されることにより位置と角度が固定されるので、ねじ修正がより安定して行える様になる。
この状態で、被修正ねじ１４又は二台を一組に組み合わせたねじ山修正器９を回転させることにより、被修正ねじ１４のねじの破損部分２０がねじ山間に噛み合った二台両方のねじ山修正器の二枚のねじ山修正刃の修正刃２２の側面により元の位置に押し戻され、塑性変形によって被修正ねじ１４のねじ山の歪みが修正される。FIG. 2 is a perspective view showing a state in which the screw 14 to be corrected is mounted on the thread corrector 9 in which two units are combined in one set. In advance, the distance between the two thread correctors and the integral thread correcting blade is larger than the diameter of the thread 14 to be corrected. The correction screw 14 is arranged, and the thread corrector combination bolt provided integrally with the two thread correctors is passed through the fan-like long slot for the combination of the respective thread correctors, All four points of the cutting edge 21 of the correction blade 22 of the thread correction blade that meshes with the thread groove between the threads of the correction screw provided in the correction device at two points on the same straight line are in contact with the root 17 of the screw thread of the correction screw. In the same way, mesh with the screw grooves on both sides of the screw to be corrected, and adjust the position and angle of both screw correctors to the axial direction perpendicular to the central axis of the screw to be corrected, so that the two screw correctors are integrated. Pressure adjustment nut 1 of the screw corrector combination bolt provided in The tightening Comco

The screw 14 to be corrected is held in a state of being pressed by the four points meshing with the thread grooves of the screw to be corrected, both of the thread correcting blades integrated with both of the thread correcting devices.
Further, if the position and angle of both of the two screw thread correctors are fixed by tightening the angle fixing nut 11, the screw thread corrector 9 that combines the two units as a set includes the pressure adjusting nut 10 and the angle fixing nut 11. Since the position and the angle are fixed by pressing, the screw correction can be performed more stably.
In this state, by rotating the corrected screw 14 or the screw thread corrector 9 in which two screws are combined into one set, both of the two screw threads in which the damaged portion 20 of the screw 14 of the corrected screw 14 is engaged between the screw threads. It is pushed back to the original position by the side surface of the correction blade 22 of the two thread correction blades of the corrector, and the distortion of the screw thread of the correction target screw 14 is corrected by plastic deformation.

FIG. 7 shows a schematic front view of a state in which the screw to be corrected 14 is pressed by two thread correction blades integrated with a thread correction device 9 in which two units are combined into one set. The correction blade 22 formed in a shape in which the cutting edge 21 is engaged with the screw groove between the threads of the screw 14 to be corrected at two points on a straight line is formed in the same cross-sectional shape as the screw groove between the screw threads, and the two units are combined into one set. Each of the four blades of the correction blade 22 of the combined thread corrector 9 is angled at a position where all four points are aligned with the screw groove of the screw 14 to be corrected and the lead angle of the screw groove of the screw 14 to be corrected. Are engaged with each other in the axial direction perpendicular to the center line 19.
In this state, by rotating the thread corrector 9 in which the corrected screw 14 or two units are combined as a set, the two parts in which the damaged portion 20 of the screw 14 of the corrected screw is engaged with the screw groove are combined into one set. It is pushed back by the side of the correction blade 22 of the thread correction blade integrated with the combined thread corrector 9, and is corrected to the original position by plastic deformation.
At this time, due to the damaged portion 20 of the screw 14 to be corrected, a force is applied to any one of the correction blades 22 of the thread corrector 9 that is a combination of the two screws so as to be removed from the thread groove in the valley of the screw 14 to be corrected. Even if added, the screw thread corrector 9 in which the two units are combined into one set has the angle of the screw to be corrected to the screw 14 fixed at a predetermined position by the pressure adjusting nut 10 and the angle fixing nut 11. Since the other three points of the correction blade 22 meshing with the lead angle of the thread groove of the valley serve as a guide, one point in contact with the damaged portion 20 of the screw 14 to be corrected also depends on the original position and angle. There is no losing.

FIG. 8 is a side view showing a main part at the time of screw thread correction in a state in which the screw 14 to be corrected is pressed from both sides with two screw thread correcting blades integrated with the thread thread corrector 9 which is a combination of two units. FIG.
The inclination of the lead angle between the valleys of the thread of the screw 14 to be corrected is opposite in the clockwise direction and the counterclockwise direction on both sides of the screw. The groove position is misaligned (the thread crest is on the opposite side of the thread root). The first thread correction blade 3 is engaged with the thread groove at a clockwise angle. The crest correction blade 4 meshes with the screw groove at a counterclockwise angle, and the first crest correction blade 3 and the second crest correction are half the distance of the lead of the screw at the center of the screw. The blade 4 is out of position.

When the positions and angles of the two thread correcting blades integrated with both thread correctors are aligned with the axial direction perpendicular to the center line of the screw to be corrected, the first thread corrector 1 integrated with the first thread corrector 1 is obtained. The first thread corrector combination bolt 5 passes through the screw corrector combination elongated hole 8 formed in the second thread corrector, so that the first thread corrector is tightened by tightening the pressure adjusting nut 10. 1 is combined with a second thread corrector 2, and a second thread corrector combination bolt 6 integral with the second thread corrector 2 is a first thread formed on the first thread corrector. Therefore, the second thread corrector 2 can be combined with the first thread corrector 1 by tightening the pressure adjusting nut 10.
Both the first thread corrector 1 and the second thread corrector 2 are perpendicular to the center line of the screw to be corrected at positions and angles that match the lead angles of the thread grooves on both sides of the screw to be corrected. The screw 14 to be corrected is composed of a first thread correcting blade 3 and a second thread correcting blade 4 which are integrated with a thread corrector 9 which is a combination of two screws. The sheet is held in a pressed state by four locations meshed with the thread grooves on both sides of the screw to be corrected.
Further, by fixing the angle fixing nut 11 to fix the angle of the thread corrector 9 that combines the two units as a set, the screw corrector 9 that combines the two units as a set has an angle with the pressure adjustment nut 10. Since the position and the angle are fixed by being pressed by the fixing nut 11, the screw correction can be performed more stably, and the first is provided integrally with the screw thread corrector 9 that combines the two units. For all the four points of the cutting edge 21 of the correction blade 22 engaged with the screw grooves on both sides of the two thread correction blades, the thread correction blade 3 and the second thread correction blade 4, with respect to the screw 14 to be corrected. All pressure adjustment, angle adjustment and position adjustment can be performed simultaneously.
In this state, by rotating the screw thread corrector 9 in which the corrected screw 14 or two screws are combined as a set, the two broken screws 20 of the screw 14 to be corrected are engaged with each other as a set. It is pushed back to the original position by the side surface of the correction blade 22 of the thread correction blade of the combined thread corrector 9, and the distortion of the screw thread is corrected by plastic deformation.

A single screw thread corrector is used to engage the thread correction blades on both sides of the screw to be corrected in accordance with the lead angle of the screw groove of the screw to be corrected, and in the axial direction perpendicular to the center line of the screw to be corrected. In order to press the screw 14 to be corrected, the angle of the screw thread correction blades on both sides of the screw 14 to be corrected can be rotated, and the position where both the correction blades are engaged depends on the pitch (lead distance) of the screw 14 to be corrected. However, the structure is complicated and the adjustment is complicated.
The screw thread corrector of the present invention can adjust the pressure, angle, and angle of the thread correcting blade with respect to the screw to be corrected by a simple operation by combining two screw thread correctors from both sides of the screw to be corrected. Since all adjustments of the position adjustment can be performed, the thread can be easily corrected without requiring technical skill.

２４と一体の第２のねじ山修正器２の二台を一組に組み合わせた第二実施形態のねじ山修正器９の斜視図である。FIG. 9 shows a case where two cutting blades 22 are arranged so that the cutting edges 21 of the two correcting blades 22 engage with the thread groove of the screw 14 to be corrected at two points on the same straight line. The first thread corrector 1 and the cutting edges 21 of the two correction blades 22 are repaired at two points on the same straight line.

24 is a perspective view of a thread corrector 9 according to a second embodiment in which two of the second thread correctors 2 integrated with 24 are combined into one set.

のねじ山修正器９の正面図である。FIG. 10 shows that the two blades 21 of the correction blades 22 are arranged so that the cutting edges 21 of the two correction blades 22 are engaged with the thread groove of the screw 14 to be corrected at two points on the same straight line. The first thread corrector 1 and the cutting edges 21 of the two correction blades 22 are arranged so that they engage with the thread groove of the screw 14 to be corrected at two points on the same straight line. Screw thread correction

It is a front view of the screw thread corrector 9.

  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.

DESCRIPTION OF SYMBOLS 1 1st thread corrector 2 2nd thread corrector 3 1st thread corrector blade 4 2nd thread corrector blade 5 1st thread corrector combination bolt 6 2nd thread corrector Combination bolt 7 First screw corrector combination long hole 8 Second screw corrector combination long hole 9 Thread corrector combining two units in one set Pressure adjusting nut 11 Angle fixing nut 12 Lock nut 13 Fixing bolt 14 Screw 15 to be corrected 15 Center line 16 in the thickness direction of the first thread correcting blade 17 Center line 17 in the thickness direction of the second thread correcting blade 17 Valley root 18 of the thread to be corrected Screw to be corrected Screw thread (outer)
19 Center line 20 of the screw to be corrected 20 Damaged part 21 of the screw to be corrected 21 Cutting edge 22 Correction blade 23 A pair of first thread correction blades 24 A pair of two screw thread correction blades

  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. An object of the present invention is 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 much, it will be difficult to rotate because it will be difficult to correct the damaged part of the thread of the screw to be corrected, which has a large pitch and a large thread, with multiple correction blades at the same time. .

  In order to achieve the above-mentioned object, a thread corrector according to the present invention is a correction blade having the same cross-sectional shape as between threads, a thread correction blade in which two points on the same straight line mesh with a thread groove of a screw to be corrected, and a thread Two screw thread correctors with corrector combination bolts integrated with the main body are combined into each other's thread corrector in a long hole that is formed in the shape of a fan for the thread corrector combination formed in the main body and penetrated. Pass the bolts and fix the two thread correctors in place and angle with the pressure adjustment nut and angle fixing nut. As a set of thread correctors, all four points of the cutting edge engaged with the thread groove of the thread to be corrected of the thread correcting blade provided on the thread corrector on both sides are positioned and angled to match the lead angle of the thread groove. Fixed in the axial direction perpendicular to the center axis of the screw to be corrected Therefore, when correcting the thread of the screw to be corrected with a large pitch and a large screw thread, the damaged part of the screw thread of the screw to be corrected is used as the screw groove of the screw to be corrected of the screw thread. It is characterized in that the damaged portion of the screw thread of the screw to be corrected can be corrected by plastic deformation to the original position one by one by pushing back by the side portion of the meshing correction blade.

  According to the present invention, the four points of the correction blade meshed with the thread groove of the screw to be corrected of the thread correction blade provided in both screw thread correction devices as a set of thread correction devices. All can be fixed in the axial direction perpendicular to the central axis of the screw to be corrected at a position and angle that matches the lead angle of the screw groove on both sides of the screw to be corrected, so that the thread can be corrected smoothly and the pitch The side of the correction blade that meshes with the thread groove of the screw of the thread correction blade that is integrated with the thread corrector on both sides, even when correcting the thread of the correction screw that has a large thread size. The screw thread of the screw to be corrected is damaged and the deformed part is pushed back to the original position one by one to correct the screw thread damaged by the plastic deformation. Multiple damaged blades with multiple correction blades Than when corrected Oshiki' place simultaneously, it is possible to turn without difficulty be modified screw be sandwiched strongly be modified screw, it is possible to easily screw modified without requiring technical skill.

The perspective view of the thread corrector which combined two units of 1st embodiment into 1 set. The perspective view which shows the state which attached the to-be-corrected screw to the screw thread correction device which combined two sets of 1st Embodiment shown in FIG. 1 into 1 set. The front view of the thread corrector which combined two units | sets of 1st embodiment into 1 set. The front view of one screw thread corrector of 1st embodiment shown in FIG. The left view of one screw thread corrector of 1st embodiment shown in FIG. The perspective view of the screw thread correction blade of 1st embodiment. The front schematic diagram which shows the principal part at the time of thread correction using the thread corrector which combined two units | sets of 1st Embodiment shown in FIG. 2 into 1 set. The side surface schematic diagram which shows the principal part at the time of the thread correction using the thread corrector which combined two units | sets of 1st Embodiment shown in FIG. 2 into 1 set. The perspective view of the thread corrector which combined two units of 2nd embodiment into 1 set. The front view of the thread corrector which combined two units | sets of 2nd embodiment into 1 set.

  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 embodiment is provided with a corrected screw 14 (a screw in which a part of the thread is damaged), and rotates the corrected screw 14 or a thread corrector 9 that is a combination of two units. However, it is an instrument that corrects the thread of a damaged screw close to the original thread. FIG. 1 is a perspective view of a thread corrector 9 in which two units of the first embodiment are combined as a set, and FIG. 2 is a thread of combination of two units in the first embodiment shown in FIG. FIG. 3 is a perspective view showing a state in which the corrector screw 14 is mounted on the corrector 9, and FIG. 3 shows a first embodiment in which two sets of the first thread corrector 1 and the second thread corrector 2 are combined. FIG. 4 is a front view of the first thread corrector 1 of the first embodiment shown in FIG. 3, and FIG. 5 is the first embodiment shown in FIG. FIG. 6 is a perspective view of the screw thread correcting blade of the first embodiment, and FIG. 7 is a screw thread obtained by combining the two units shown in FIG. FIG. 8 is a schematic front view showing a main part at the time of screw thread correction using the screw thread corrector of the first embodiment using the corrector 9, and FIG. 8 is a screw thread obtained by combining the two units shown in FIG. Corrector FIG. 9 is a perspective view of a thread corrector in which two units of the second embodiment are combined into one set, and FIG. 9 is a schematic side view showing a main part at the time of thread correction using the thread corrector of the first embodiment using FIGS. 10A and 10B are front views of a screw thread corrector in which two units of the second embodiment are combined into one set.

  As shown in FIG. 4, in the first thread corrector 1, two points of the correction blade 22 formed on the same straight line with the same cross-sectional shape as the thread groove between the threads are the screw of the screw 14 to be corrected. The first thread correction blade 3 that meshes with the groove is integrally combined with the first thread corrector 1 with two mounting bolts 13, and the first thread corrector combination bolt 5 is the first The screw thread corrector 1 is integrally provided with the first thread corrector 1 by being screwed into the main body through a screw hole provided in the thread corrector 1 and fixed with a lock nut 12. As shown in FIG. 5, on the center line 15 in the thickness direction of the first thread correction blade 3 of the first thread corrector 1, the first thread corrector combination bolt 5 and the screw A first thread corrector combination oblong hole 7 through which a thread corrector combination bolt for the combination of two thread correctors passes through the thread correcting blade is passed through the first thread thread. It is formed in a fan shape from the center point of the corrector combination bolt 5.

  As shown in FIG. 3, the two screw thread correctors include a screw thread corrector combination bolt integrally formed with each other's body, and a fan-shaped through hole for the thread corrector combination. By being combined by the pressure adjusting nut 10 and being fixed by the angle fixing nut 11, it functions as a screw thread corrector 9 in which two units are combined in one set.

  FIG. 2 is a perspective view showing a state in which the screw 14 to be corrected is mounted on the thread corrector 9 in which two units are combined in one set. In advance, the distance between the two thread correctors and the integral thread correcting blade is larger than the diameter of the thread 14 to be corrected. The correction screw 14 is arranged, and the thread corrector combination bolt provided integrally with the two thread correctors is passed through the fan-like long slot for the combination of the respective thread correctors, All four points of the cutting edge 21 of the correction blade 22 of the thread correction blade that meshes with the thread groove between the threads of the correction screw provided in the correction device at two points on the same straight line are in contact with the root 17 of the screw thread of the correction screw. In the same way, mesh with the screw grooves on both sides of the screw to be corrected, and adjust the position and angle of both screw correctors to the axial direction perpendicular to the central axis of the screw to be corrected, so that the two screw correctors are integrated. Pressure adjustment nut 1 of the screw corrector combination bolt provided in By combining the two, the pressure adjustment, angle adjustment, and position adjustment of the two thread correctors can all be performed simultaneously, and the screw 14 to be corrected is a thread correcting blade integrated with both thread correctors. The two pieces are held in a pressed state by four points that mesh with the thread grooves of the screw to be corrected. Further, if the position and angle of both of the two screw thread correctors are fixed by tightening the angle fixing nut 11, the screw thread corrector 9 that combines the two units as a set includes the pressure adjusting nut 10 and the angle fixing nut 11. Since the position and the angle are fixed by pressing, the screw correction can be performed more stably. In this state, by rotating the corrected screw 14 or the screw thread corrector 9 in which two screws are combined into one set, both of the two screw threads in which the damaged portion 20 of the screw 14 of the corrected screw 14 is engaged between the screw threads. It is pushed back to the original position by the side surface of the correction blade 22 of the two thread correction blades of the corrector, and the distortion of the screw thread of the correction target screw 14 is corrected by plastic deformation.

  FIG. 7 shows a schematic front view of a state in which the screw to be corrected 14 is pressed by two thread correction blades integrated with a thread correction device 9 in which two units are combined into one set. The correction blade 22 formed in a shape in which the cutting edge 21 is engaged with the screw groove between the threads of the screw 14 to be corrected at two points on a straight line is formed in the same cross-sectional shape as the screw groove between the screw threads, and the two units are combined into one set. Each of the four blades of the correction blade 22 of the combined thread corrector 9 is angled at a position where all four points are aligned with the screw groove of the screw 14 to be corrected and the lead angle of the screw groove of the screw 14 to be corrected. Are engaged with each other in the axial direction perpendicular to the center line 19. In this state, by rotating the thread corrector 9 in which the corrected screw 14 or two units are combined as a set, the two parts in which the damaged portion 20 of the screw 14 of the corrected screw is engaged with the screw groove are combined into one set. It is pushed back by the side of the correction blade 22 of the thread correction blade integrated with the combined thread corrector 9, and is corrected to the original position by plastic deformation. At this time, due to the damaged portion 20 of the screw 14 to be corrected, a force is applied to any one of the correction blades 22 of the thread corrector 9 that is a combination of the two screws so as to be removed from the thread groove between the valleys of the screw 14 to be corrected. Even if added, the screw thread corrector 9 in which the two units are combined into one set has the angle of the screw to be corrected to the screw 14 fixed at a predetermined position by the pressure adjusting nut 10 and the angle fixing nut 11. Since the other three points of the correction blade 22 meshing with the lead angle of the thread groove of the valley serve as a guide, one point in contact with the damaged portion 20 of the screw 14 to be corrected also depends on the original position and angle. There is no losing.

FIG. 8 is a schematic side view showing a main part at the time of screw thread correction in a state in which the screw 14 to be corrected is pressed from both sides by two screw thread correcting blades integrated with the screw thread corrector 9 in which two units are combined into one set. FIG. The inclination of the lead angle between the valleys of the thread of the screw 14 to be corrected is opposite in the clockwise direction and the counterclockwise direction on both sides of the screw. Although it deviated and position of the groove (the opposite side of the root of the screw thread is the top of) the first root Ji mountain modified blade 3 is engaged with a screw groove in a clockwise angle, Ji second root mountain modified blade 4 is in mesh with a thread groove in counterclockwise angle, half the distance portion of the screw of the lead in the face of the center of the screw, the first root Ji mountain modified blade 3 second root Ji mountain modifications The blade 4 is out of position.

Together the position and angle of the two thread modified blade integral with both threads modifier in the axial direction perpendicular to the center line between the object to be modified screw, the first root Ji mountain modifier 1 integral first the first root Ji mountain modifier by tightening the pressure adjusting nut 10 since the threads modifier combinations bolt 5 of 1 through threads modifier combination for slot 8 formed in the second thread modifier 1 is combined to the second thread corrector 2, first second thread modifier combinations bolt 6 of the second root Ji mountain corrector 2 and integrally formed on the first thread modifier Therefore, the second thread corrector 2 can be combined with the first thread corrector 1 by tightening the pressure adjusting nut 10. Perpendicular to the center line of the corrected screw in position and angle to suit both the first root of the two units Ji and mountain corrector 1 second thread corrector 2 to the lead angle of the sides of the thread groove of the modified screw The screw 14 to be corrected is composed of a first thread correcting blade 3 and a second thread correcting blade 4 which are integrated with a thread corrector 9 which is a combination of two screws. The sheet is held in a pressed state by four locations meshed with the thread grooves on both sides of the screw to be corrected. Further, by fixing the angle fixing nut 11 to fix the angle of the thread corrector 9 that combines the two units as a set, the screw corrector 9 that combines the two units as a set has an angle with the pressure adjustment nut 10. Since the position and the angle are fixed by being pressed by the fixing nut 11, the screw correction can be performed more stably, and the first is provided integrally with the screw thread corrector 9 that combines the two units. For all the four points of the cutting edge 21 of the correction blade 22 engaged with the screw grooves on both sides of the two thread correction blades, the thread correction blade 3 and the second thread correction blade 4, with respect to the screw 14 to be corrected. All pressure adjustment, angle adjustment and position adjustment can be performed simultaneously. In this state, by rotating the screw thread corrector 9 in which the corrected screw 14 or two screws are combined as a set, the two broken screws 20 of the screw 14 to be corrected are engaged with each other as a set. It is pushed back to the original position by the side surface of the correction blade 22 of the thread correction blade of the combined thread corrector 9, and the distortion of the screw thread is corrected by plastic deformation.

  A single screw thread corrector is used to engage the thread correction blades on both sides of the screw to be corrected in accordance with the lead angle of the screw groove of the screw to be corrected, and in the axial direction perpendicular to the center line of the screw to be corrected. In order to press the screw 14 to be corrected, the angle of the screw thread correction blades on both sides of the screw 14 to be corrected can be rotated, and the position where both the correction blades are engaged depends on the pitch (lead distance) of the screw 14 to be corrected. However, since the structure is complicated and the adjustment is complicated, the thread corrector of the present invention is simple by combining two thread correctors from both sides of the screw 14 to be corrected. All adjustments such as pressure adjustment, angle adjustment, and position adjustment of the thread correction blade can be performed on the screw 14 to be corrected by operation, so that the thread correction can be easily performed without requiring technical skill. .

  FIG. 9 shows a case where two cutting blades 22 are arranged so that the cutting edges 21 of the two correcting blades 22 engage with the thread groove of the screw 14 to be corrected at two points on the same straight line. The first thread corrector 1 and the cutting edges 21 of the two correction blades 22 are arranged so that they engage with the thread groove of the screw 14 to be corrected at two points on the same straight line. It is a perspective view of the thread corrector 9 of 2nd embodiment which combined two sets of the 2nd thread corrector 2 integral with the thread corrector blade 24 of this.

  FIG. 10 shows that the two blades 21 of the correction blades 22 are arranged so that the cutting edges 21 of the two correction blades 22 are engaged with the thread groove of the screw 14 to be corrected at two points on the same straight line. The first thread corrector 1 and the cutting edges 21 of the two correction blades 22 are arranged so that they engage with the thread groove of the screw 14 to be corrected at two points on the same straight line. It is a front view of the thread corrector 9 of 2nd embodiment which combined two sets of the 2nd thread corrector 2 integral with the thread corrector blade 24 of this.

  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.

DESCRIPTION OF SYMBOLS 1 1st thread corrector 2 2nd thread corrector 3 1st thread corrector blade 4 2nd thread corrector blade 5 1st thread corrector combination bolt 6 2nd thread corrector Combination bolt 7 Long hole for first thread corrector combination 8 Long hole for second thread corrector combination 9 Thread corrector combining two units in one set 10 Pressure adjustment nut 11 Angle fixing nut 12 Lock nut 13 Mounting bolt 14 Screw to be corrected 15 Center line in the thickness direction of the first thread correction blade 16 Center line in the thickness direction of the second thread correction blade 17 Valley of the root of the screw to be corrected 18 Screw to be corrected Screw thread (outer)
DESCRIPTION OF SYMBOLS 19 Center line of to-be-corrected screw 20 Broken part of to-be-corrected screw 21 Cutting edge 22 Correcting blade 23 First set of two thread correction blades with two sheets 24 Second set of second thread correcting blade with two sheets

Claims (3)

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;
The correction blade of the thread correction blade is formed such that two points on the same straight line are in contact with one side of the screw to be corrected,
The thread correction blade is arranged so as to sandwich the screw to be corrected from both sides,
A screw thread corrector characterized in that the screw thread of the screw to be corrected can be corrected by rotating the screw to be corrected or the screw thread corrector.   The screw thread correcting blade can push back the damaged part of the screw thread to the original position by the side surface of the correcting blade meshed with the thread groove of the screw to be corrected, and correct the screw thread damaged by the plastic deformation. The thread corrector according to claim 1.   The thread corrector is formed by combining two sets of a first thread corrector and a second thread corrector, and the first thread corrector and the second screw. The thread corrector according to claim 1 or 2, wherein the thread corrector is relatively rotatable and displaceable.

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