JPH11156751A - Utensil for breaking and removing tongue - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a utensil for breaking and removing a tongue capable of easily breaking and removing the tongue even in the presence of a shallow screw prepared hole, and causing to defectiveness in that a pin strikes at the screw prepared hole at its bottom part to deform the bottom part in the case of the thin bottom thickness of the screw prepared hole. SOLUTION: Setting a shaft 5 in an installing member 11 and inserting the shaft 5 into an insert coil with a handle 6 strike a hook 7 at the tongue 16 of the insert coil 15. Meanwhile, the shaft is bent, escaping the shaft from the tongue 16. Inserting the shaft 5 until the hook 7 completely passes through the tongue 16 returns the hook 7 to the horizontal state when the hook 7 completely passes through the tongue 16. Withdrawing the shaft 5 by pushing up the handle 6 engages the hook 7 with the tongue 16. Continuous withdrawal bends and breaks the tongue 16 at its notched part near its root. Then removing the utensil for breaking and removing the tongue removes the broken tongue 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tongue breaker.

[0002]

2. Description of the Related Art In general, when the purpose is to improve the durability of a female screw, increase the fatigue limit, and repair in the event of a female screw failure, a screw hole 14 is formed in a mounting member 11 so that the screw is formed. The insert coil 15 is screwed into the pilot hole 14 and mounted.

As shown in FIGS. 7A and 7B, the insert coil 15 is formed by winding a wire 15a in a coil shape, and a tongue is provided at the end of the coil wire made of the wire 15a. 16 are formed and this tongue 1
Near the root of 6, a notch 17 for breaking is formed.

[0004] When the insert coil 15 is screwed into the screw hole 14 of the mounting member 11, a tongue 16 is sandwiched between the rotating parts of the screwing tool by using a screwing tool (not shown), and the rotating part is fixed to the screwing tool. Rotate tongue 1
6, the insert coil 15 is rotated, and the insert coil 15 is screwed into the screw hole 14.

[0005] As described above, the tongue 16 is used when the insert coil 15 is inserted into the pilot hole 14 of the screw. However, after the insertion, the tongue 16 becomes unnecessary and must be removed.

To remove the tongue 16 after the insert coil 15 is inserted into the pilot hole 14 as described above, a pin 18 having a diameter corresponding to the inner diameter of the insert coil 15 is prepared as shown in FIG. Then, the pin 18 is inserted into the insert coil 15, the tip surface 18 a of the pin 18 is applied to the tongue 16, and the pin 18 is
By hitting at 9, the tongue 16 was to be broken off at the notch 17 at the base.

[0007]

However, the screw hole 14 is a blind screw hole, and the screw hole 14
If the depth of the tongue is shallow,
Of the tongue 16 hits the bottom 14a of the pilot hole 14, and the tongue 16 cannot be broken at the notch 17 and cannot be removed in many cases. Also, as shown in FIG. 9, when the bottom thickness t of the screw hole 14 is small, when the tongue 16 is cut off, the tip surface 18a of the pin 18 hits the bottom portion 14a of the screw hole 14 and deforms the bottom portion 14a. There was a problem to make it.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make it possible to easily remove a tongue even when a screw hole is shallow, and to remove a tongue. Conventionally, when the bottom thickness t of the hole is thin,
In some cases, the pin hit the bottom of the pilot hole, causing a problem such as deforming the bottom.To provide a tongue breaker that can perform work without causing such a problem. is there.

[0009]

In order to achieve the above object, a tongue breaker according to the first aspect of the present invention has a tip portion of a shaft which is inserted into a screw hole provided with an insert coil. A hook for breaking the tongue of the insert coil is provided.

[0010] With this configuration, in removing the tongue of the insert coil in the blind screw hole, the tongue can be easily cut off even if the pilot hole is shallow, and the bottom thickness t of the pilot hole is small. In some cases, conventionally,
In some cases, the pin hits the bottom of the prepared screw hole, causing a problem such as deforming the bottom. However, the work can be performed without causing such a problem.

According to a second aspect of the present invention, there is provided a tongue breaking tool according to the first aspect, wherein the hook is formed of an insert coil having the screw hole. When the hook is in contact with the tongue, it rotates toward the shaft when it comes into contact with the tongue, so that the hook passes through the tongue portion.

With this configuration, not only can the same effects as those of the first aspect of the present invention be obtained, but also, as the shaft is inserted into the insert coil, the hook hits the tongue of the insert coil. Can rotate to the shaft side by contact with the tongue to avoid the tongue.

In order to achieve the above object, the tongue breaking tool according to the third aspect of the present invention is arranged such that a pair of long holes along the axial direction of the sleeve main body are opposed to each other on the periphery of the sleeve main body. A handle formed through the elongated hole facing the sleeve and movable in the axial direction of the sleeve body in the elongated hole, and an end inserted into the sleeve is connected to the handle. The shaft is folded toward the shaft by contact with the tongue of the insert coil attached to the distal end of the shaft and attached to the prepared screw hole, and is opposed to the shaft by releasing the contact with the tongue. And a hook that expands to the side and is hooked on the tongue.

With this configuration, when the handle is operated to insert the shaft into the insert coil, the hook hits the tongue of the insert coil, but the hook is folded toward the shaft by contact with the tongue to avoid the tongue. Then, when the shaft is inserted until the hook completely passes through the tongue, at the time when the hook completely passes through the tongue, the hook expands to the side opposite to the shaft side and is hooked on the tongue. In this state, by pulling the shaft by pulling the handle, the tongue is broken off near its root.

Therefore, when removing the tongue of the insert coil in the blind screw hole, especially when the pilot hole is shallow, the tongue can be easily cut off and the bottom thickness t of the pilot hole is small. Conventionally, there has been a case where the pin hits the bottom of the prepared screw hole, causing a problem such as deformation of the bottom. However, the work can be performed without such a problem.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. FIG. 1 is a front view of the tongue breaker according to the present invention, and FIG. 2 is a side view of the tongue breaker.

The tongue breaking tool F according to the present invention includes a sleeve 1, and a long hole 2 along the axial direction of the sleeve body 1 A is provided around the cylindrical sleeve body 1 A of the sleeve 1. Both ends of the sleeve body 1A are closed, and a sliding hole 4 is formed at the center of the lower closed end face 3.

The upper portion of the shaft 5 having a diameter smaller than the inner diameter of the insert coil is inserted into the sleeve 1 from the sliding hole 4 of the closed end face portion 3. A handle 6 is provided through the hole 2, and the upper end of the shaft 5 is connected to the center of the handle 6. A hook 7 is attached to the lower end of the shaft 5. In this case, the hook 7 interferes with a stopper (not shown) in the horizontal state A, and the hook 7 is attached by the pin 8 so as to rotate only upward from the horizontal state A. It does not rotate.
For example, the hook 7 may be held in a horizontal state by a torsion spring.

The insert coil 15 is formed by winding a wire 15a into a coil as described in the conventional example, and a tongue 16 is formed at the end of the coil wire made of the wire 15a. In the vicinity of the root of the tongue 16, a notch 17 for breaking off is formed. The insert coil 15 is provided in the screw hole 1 of the mounting member 11.
4 screwed.

Next, the breaking of the tongue using the tongue breaking tool F configured as described above will be described.

As shown in FIG. 3, the tongue breaking tool F is set on the mounting member 11, and the handle 6 is operated to insert the shaft 5 into the insert coil 15. Shaft 5
Are inserted, the hook 7 hits the tongue 16 of the insert coil 15, but the hook 7 is bent to avoid the tongue 16 as shown in FIG. And hook 7
When the shaft 5 is inserted until the hook 7 has completely passed through the tongue 16,
The hook 7 returns to the horizontal state A as shown in FIG.

Next, the hook 7 is hooked on the tongue 16 by pulling the shaft 5 by pulling the handle 6, and the tongue 16 is bent and broken at the notch 17 near the root by further pulling. After the break, the tongue breaker is removed, and the broken tongue 16 is removed.

According to the above-described embodiment, in the removal of the tongue 16 of the insert coil 15 at the blind screw hole 14, the tongue 16 can be broken even when the pilot hole 14 is shallow. Removal becomes easier.

In the case where the bottom thickness t of the screw hole 14 is small, conventionally, the pin 18 is
In some cases, a problem such as deformation of the bottom portion 14a may occur, but the operation can be performed without causing such a problem.

In the tongue breaking operation of the insert coil 15, by changing the outer dimensions of the shaft 5 and the hook 7, all the insert coils 15
Can be applied to any size.

[0027]

As described above, according to the present invention,
In the removal of the tongue of the insert coil at the blind screw hole, especially when the pilot hole is shallow, the tongue can be easily cut off and when the bottom thickness t of the pilot hole is small, the pin is conventionally used. In some cases, the bottom of the screw hole hit the bottom, causing a problem such as deforming the bottom.
The work can be performed without causing such a problem.

[Brief description of the drawings]

FIG. 1 is a front view of a tongue breaker according to the present invention.

FIG. 2 is a side view of the tongue breaker.

FIG. 3 is an explanatory view showing a state in which the tongue breaker is set on a mounting member, and a handle is operated to insert a shaft into an insert coil.

FIG. 4 is an explanatory view showing a state where a tongue of an insert coil is broken.

FIG. 5 is an explanatory view of a state in which the handle is operated to insert the shaft into the insert coil and the hook is brought into contact with the tongue in the tongue breaking tool.

FIG. 6 is an explanatory diagram of a state where the hook is hooked on a tongue.

FIG. 7A is a front view of an insert coil.
(2) is a bottom view of the insert coil.

FIG. 8 is an explanatory diagram of a state in which a tongue is broken off by a conventional tongue breaking tool.

FIG. 9 is an explanatory view showing a state in which a tongue is broken off by a conventional tongue breaking tool.

[Explanation of symbols]

 Reference Signs List 1 sleeve 1A sleeve body 2 long hole 5 shaft 6 handle 7 hook 14 screw pilot hole 15 insert coil 16 tongue

Claims (3)

[Claims] 1. A tongue breaking tool, wherein a hook for breaking the tongue of the insert coil is provided at a distal end of a shaft inserted into a screw hole provided with the insert coil. 2. When the hook comes into contact with the tongue when the hook is inserted into the insert coil of the threaded hole, the hook rotates toward the shaft so that the hook passes through the tongue portion. The tongue breaking tool according to claim 1. 3. A sleeve formed on a peripheral portion of a sleeve body so as to face a pair of elongated holes along an axial direction of the sleeve body, and the elongated hole penetrating the opposed slots of the sleeve. A handle that can move in the axial direction of the sleeve main body, a shaft having an end inserted into the sleeve connected to the handle, and an insert attached to a distal end of the shaft and attached to a pilot hole. A tongue which is folded toward the shaft side by contact with the tongue of the coil, and which expands to a side opposite to the shaft side by releasing contact with the tongue and is hooked on the tongue. Break-off tool.