JPH0645334Y2 - Insert tool for coiled inserts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of an insertion tool for inserting a coiled insert into a screw hole.

[Conventional technology]

When the material having the screw holes is a soft material, sufficient screw hole strength cannot be obtained, so that a coil-shaped insert is inserted into this to reinforce it. Coil insert H
As shown in FIGS. 5 and 6, is a wire rod having a rhomboidal cross section wound into a coil, and a bent piece h is formed at one end thereof. In order to insert the coiled insert H into the screw hole, the bending piece h is hooked on the tip notch of the insertion tool and screwed into the screw hole by the insertion tool.

Since the coiled insert H has a larger diameter than the screw hole and lacks rigidity like a spring, it is difficult to insert the coiled insert H into the screw hole. 4232
Various insertion tools such as the No. 0 publication have been considered.

[Problems to be solved by the invention]

However, since the coiled insert H has a large elastic force like a spring as described above, the mounting situation is not stable even when the bending piece h is attached by hooking the bending piece h in the notch of the tip of the insertion tool. It had to be done carefully when inserting into. Further, in all of the conventional insertion tools, the insertion depth cannot be adjusted by merely inserting the coiled insert H into the screw hole.

The present invention has been made in view of the above problems, and when the coiled insert H is inserted into a screw hole, the insertion tool is reliably mounted and the insertion depth into the screw hole is stabilized. It is an object of the present invention to provide an insertion tool that does.

[Means for solving problems]

The present invention made to achieve the above object includes a rotary cylinder to which rotation from a drive source is transmitted, and a movable cylinder provided in the rotary cylinder so as to rotate together with the rotary cylinder and slide in the axial direction. , A notch at which the bent piece of the coiled insert is locked is formed by a vertical groove and a horizontal groove, and the other end has an insertion shaft with a pawl clutch plate attached, and the width of the horizontal groove is the width of the bent piece. The width of the claw clutch plate of the insertion shaft and the claw clutch plate of the moving cylinder that meshes with the claw clutch plate of the insertion shaft, and the catch width of the notch is smaller than the catch width of the claw clutch plates. The gist is an insertion tool including a pressing spring provided in the movable barrel so that the plates are elastically engaged with each other, and an adjustable stopper that limits axial movement of the movable barrel.

[Action]

With the above-described structure, the insertion tool of the present invention is configured such that the rotation from the drive source is transmitted to the insertion shaft through the rotary cylinder, the movable cylinder, and the pawl clutch plate, and the insertion shaft rotates. By hooking the bending piece h on the notch formed at the tip of the insertion shaft and formed of the vertical groove and the horizontal groove, the coiled insert H is stably mounted on the insertion shaft without moving in the axial direction.

Therefore, the coiled insert H rotates together with the insertion shaft, and if it is pressed against the screw hole, it enters the screw hole along the lead of the screw hole. At this time, the insertion shaft also advances toward the screw hole along with the movable cylinder. After that, the movable cylinder hits the stopper and stops moving forward, but since the rotation of the drive source is not stopped, the insertion shaft rotates and moves forward until the pawl clutch plate is released while compressing the pressing spring. When the claw clutch plate is released and the rotation from the drive source is not transmitted, the coiled insert H and the insertion shaft both stop rotation and advance. By adjusting this stopper, the insertion depth of the coiled insert H into the screw hole is determined, and a stable insertion depth can always be obtained.

When the rotation and the forward movement stop, the insertion shaft retracts due to the force of the push spring, the claw clutch plate meshes with the claw clutch plate of the moving cylinder, and the rotation is transmitted again, but the catching width of the claw clutch plate is not the cutout part. Since the width is larger than the catching width, the bent portion h of the coiled insert H comes out of the notch at the tip of the insertion shaft, and the insertion shaft is re-inserted into the coiled insert H.
There are no problems such as rotating.

〔Example〕

A rotary cylinder 3 is coupled to an output shaft 21 of a drive source 2 such as a motor fixed to the case 1. A groove 31 is bored in the inside of the rotary cylinder 3 in the axial direction, and a projection 41 of the movable cylinder 4 is fitted into the groove 31, so that the movable cylinder 4 transmits the rotation of the rotary cylinder 3 and the inside of the rotary cylinder 3 in the axial direction. It can be slid on. Moving tube 3
Inside, a claw clutch plate 43 as shown in FIG. 3 is attached by a pin 42.

Reference numeral 5 denotes an insertion shaft, one end of which is projected from the case 1, and a distal end portion thereof is provided with a cutout portion 51 on which a bent portion (bent piece) h of the coiled insert H is caught. The notch 51 has a slit (vertical groove) 52 as shown in detail in FIGS. 2A and 2B,
Horizontal grooves 53, 53 are formed from the outer side of the insertion shaft 5 toward the vertical groove 52. A claw clutch plate 54 is attached to the other end of the insertion shaft 5, and the claw clutch plate 54 and the claw clutch plate 43 are connected to the claw clutch plate 43 by the action of the push spring 6 interposed between the claw clutch plate 54 and the end of the moving cylinder 4. It is designed to mesh with each other.

Thus, the rotation of the drive source 2 is transmitted to the insertion shaft 5 via the output shaft 21, the rotary cylinder 3, the movable cylinder 4, and the claw clutch plates 43 and 54.

Reference numeral 7 is a stopper, and the screw shaft 8 and the ring 9 are used for the case 1
And the insertion shaft 5 penetrates through the center. By rotating the screw shaft 8, the stopper 7 can be adjusted in the axial direction.

After the bent portion h of the coil-shaped insert H is hooked on the vertical groove 52 and the horizontal groove 53 and attached to the insertion shaft 5 to stabilize in the axial direction (see FIG. 4), it is pressed against the screw hole 10. If the motor 2 is driven in this state, the rotation is transmitted to the insertion shaft 5,
The coiled insert H enters the screw hole 10 (first
Figure). When it is further inserted from the state shown in FIG. 1 and the movable cylinder 4 hits the stopper 7, the insertion shaft 5 compresses the pushing spring 6 and rotates forward until the pawl clutch plates 43, 54 are released, and the insertion is completed. To do.

At the end, the bent portion h of the coiled insert H released from rotation is reversed about 30 ° due to the elastic force to be disengaged from the horizontal grooves 53, 53, and the insertion shaft 5 is pushed by the force of the push spring 6. When retracted, the pawl clutch plates 43 and 54 engage again. As a result, the insertion shaft 5 rotates again, but the catching width D of the claw clutch plates 43, 54 is changed to the catching width (cutout depth) of the notch 51.
Since it is larger than d, the bent portion h is disengaged from the cutout portion 51, and no trouble such as rotation of the coiled insert H occurs.

If the axial size of the coiled insert H is changed,
When changing the insertion depth, it can be easily adjusted by turning the screw shaft 8.

[Effect of device]

As described above, according to the present invention, the stopper 7 can be finely adjusted, and in order to surely disconnect the pawl clutch plates 43 and 54 at this adjustment position, the coiled insert H is set to a predetermined depth with respect to the screw hole 10. Can be inserted with high accuracy.

In addition, the notch 51 at the tip of the insertion shaft 5 has a vertical groove 52 and a horizontal groove 5.
Since it is formed of 3,53, it suffices if the bent portion h of the coiled insert H is caught in the vertical groove 52 and the horizontal grooves 53,53.
As a result, the coiled insert H can be reliably mounted on the insertion shaft 5. Further, when the bent piece h is disengaged from the notch 51 even after the insertion is completed, the force of the push spring 6 causes the claw clutch plate 54
Moves backward and meshes with the claw clutch plate 43, but
Since the catching width D of 43 and 54 is larger than the catching width d of the notch 51, the notch 51 is not caught by the bent piece h, and the insertion tool can be removed without any trouble.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a coil-shaped insert is inserted into a screw hole by the insertion tool of the present invention. FIG. 2a is a view showing details of the cutout portion, and FIG.
A-A sectional drawing of FIG. FIG. 3 is a perspective view of the pawl clutch plate. FIG. 4 is a view showing a state in which the coiled insert is attached. 5 and 6 are views showing a coiled insert. 2 ... Drive source, 3 ... Rotating cylinder, 4 ... Moving cylinder, 5 ... Inserting shaft, 6 ... Push spring, 7 ... Stopper, 51 ... Notch, 52 ... Vertical groove, 53 ... … Horizontal groove, 43,54 …… Pawl clutch plate, H …… Coil-shaped insert,

Claims (1)

[Scope of utility model registration request] 1. A rotary cylinder to which rotation from a drive source is transmitted, a movable cylinder provided in the rotary cylinder so as to rotate together with the rotary cylinder and to be slidable in an axial direction, and a coiled insert at the tip. The notch that the bent piece of is locked is formed by a vertical groove and a horizontal groove,
An insertion shaft having a pawl clutch plate attached to the other end, a width of the lateral groove is substantially equal to a width of the bent piece, and a pawl clutch plate in the movable cylinder that meshes with the pawl clutch plate of the insertion shaft;
A push spring provided in the moving cylinder so that the catching width of the cutout portion is smaller than the catching width of the claw clutch plates, and the claw clutch plates are elastically engaged with each other. A tool for inserting a coiled insert, which comprises an adjustable stopper that limits the axial movement of the insert.