JP2023016068A - Screw fastening tool - Google Patents

Abstract

To provide a screw fastening tool capable of holding a screw and a member to be fixed, through which the screw is inserted.SOLUTION: A screw fastening tool 1 comprises a handle 2, and a shank 3, the tip of which is formed with an engagement part 31 engaged with a screw. The screw fastening tool 1 has the shank 3 provided with a support member 4 freely rotatable with respect to the shank 3, and has the support member 4 provided with a holding member 5 capable of elastically holding a member to be fixed, through which the screw engaged with the engagement part 31 is inserted.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw tightening tool for attaching and detaching a screw for fixing a member to be fixed.

2. Description of the Related Art When turning or milling a workpiece such as metal, a cutting tool 9 having a holder 6 with a replacement indexable insert 7 is sometimes used as shown in FIG. The indexable tip 7 fixed to the holder 6 by the screw 8 is attached and detached using a tool such as a wrench or a driver. Many of such indexable inserts 7 are small in size, and may be accidentally dropped and lost when attaching to or detaching from the holder 6 . Throwaway inserts 7 having a plurality of cutting edges can be used until all the cutting edges are worn out, and the unit price is relatively high. helps reduce

By the way, as described in Patent Document 1, it is known to provide a tool such as a screwdriver with a member for holding a screw in order to prevent the screw from falling out of the tool during attachment and detachment. However, although such a tool can prevent the screw from falling off, it cannot prevent the member to be fastened, such as the indexable tip, to be fixed by the screw from falling off. Patent Document 2 describes a wrench that uses a magnet to prevent a throwaway tip made of a magnetic material from falling off. cannot be prevented from falling out.

JP-A-2000-135685 JP-A-10-296647

The problem to be solved by the present invention is to solve the conventional problems described above and to provide a screw tightening tool capable of holding a screw and a member to be fixed through which the screw is inserted.

In order to solve the above-mentioned problems, a screw tightening tool has a handle and a shaft portion formed with an engaging portion that engages with a screw at the tip thereof, wherein the shaft portion rotates with respect to the shaft portion. A screw tightening tool provided with a flexible support member, and the support member is provided with a clamping member capable of elastically clamping a member to be fixed through which the screw engaged with the engaging portion is inserted. do.

Further, the clamping member may be arranged so that the distal end side thereof can be opened and closed with respect to the shaft portion, and the distal end side can be opened by pressing a pressing portion provided on the proximal end side of the clamping member with a finger. preferable.

Further, the clamping member has a clamping portion that clamps the member to be fixed on the distal end side, and the clamping portion has a V-shaped cross section perpendicular to the extending direction of the shaft portion. is preferred.

Moreover, it is preferable that the holding member is made of a leaf spring.

Moreover, it is preferable that the clamping member is made of resin, and configured such that the distal end side thereof is closed by being pressed by a spring.

According to the present invention, it is possible to provide a screw tightening tool capable of holding a screw and a member to be fixed through which the screw is inserted.

1 is a front view of the screw tightening tool of the first embodiment; FIG. 1 is a side view of the screw tightening tool of the first embodiment; FIG. 1 is an exploded view of a cutting tool to which a throwaway tip, which is a member to be fixed in the first embodiment, is attached; FIG. It is the figure which showed the procedure which attaches an indexable tip to a holder using the screw tightening tool of 1st Embodiment. (A) shows a state in which the shaft portion and the clip body are open, and (B) shows a state in which the throwaway tip through which the screw is inserted is held between the shaft portion and the clamping portion of the clip body. 4B is a cross-sectional view taken along the line VV of FIG. 4B; FIG. It is a perspective view of the screw tightening tool of 2nd Embodiment. It is a partial cross-sectional view of the screw tightening tool of 2nd Embodiment. It is a perspective view of the screw tightening tool of 3rd Embodiment.

Modes for carrying out the invention are shown below. As shown in FIGS. 1 and 2, the screw tightening tool 1 of the first embodiment includes a flat plate-shaped handle 2 and a shaft portion 3 extending in the longitudinal direction. A mating engaging portion 31 is formed. A support member 4 that is rotatable with respect to the shaft portion 3 is provided on the base end side of the shaft portion 3 . The shaft portion 3 has a stepped portion (not shown) that holds the support member 4 so that it does not move in the axial direction. A bearing is used as the support member 4 in this embodiment. Note that the support member 4 is not limited to a bearing and may be another member as long as it can rotate with respect to the shaft portion 3 . The support member 4 is provided with a clamping member 5 capable of elastically clamping the member to be fixed through which the screw engaged with the engaging portion 31 is inserted.

The sandwiching member 5 will be described. As shown in FIG. 2, the clamping member 5 of the first embodiment is formed using one sheet of metal leaf spring, and has a substantially elongated plate shape extending along the longitudinal direction of the shaft portion 3. It includes a clip body 53 and a connecting portion 54 that is bent in a direction substantially orthogonal to the clip body 53 and connected to the support member 4 . When the holding member 5 is connected to the support member 4 provided on the shaft portion 3, the side positioned on the handle 2 side is defined as the base end side, and the side positioned on the engaging portion 31 side is defined as the distal end side. The connecting portion 54 of the embodiment is formed by cutting out and bending a part of the clip body 53 at a position on the base end side from the center of the clip body 53 . The connecting portion 54 of the first embodiment is adhered to the lower side of the support member 4 . Note that the connecting portion 54 is not limited to this shape, and may have another shape as long as the holding member 5 is supported so as to be able to swing with respect to the supporting member 4 .

The clip main body 53 of the first embodiment has a pressing portion 51 for pressing with a finger at the proximal end portion. The pressing portion 51 of the first embodiment is formed at an angle in a direction away from the shaft portion 3 from a position near the connecting portion 54 . Moreover, the clip main body 53 has a holding portion 52 that can elastically hold a member to be fixed on the distal end side. The holding portion 52 of the first embodiment is formed in a substantially wedge shape that gradually narrows toward the tip. Furthermore, the holding portion 52 is provided with a slit extending from the distal end to the base end side, and is mountain-folded along the slit when viewed from the shaft portion 3 side. The cross section perpendicular to the is V-shaped. The shape of the holding portion 52 is not limited to a V-shaped cross section, and may be a flat plate shape without an angle. In this case, the clamping portion 52 may be provided with a non-slip elastic member. As a result, even a member to be fixed having no corners can be held more stably.

As described above, the connecting portion 54 is formed by cutting out and bending a part of the clip main body 53 made of one sheet of leaf spring, so that the holding portion 52 can be pulled out of the shaft portion 3 by the elastic force of the leaf spring. It is biased so as to be pressed toward the tip side. When the pressing portion 51 is not pressed, the distal end side of the clip body 53 elastically abuts the distal end side of the shaft portion 3, and the shaft portion 3 and the clip body 53 are in a closed state. When an operator presses the pressing portion 51 toward the shaft portion 3 with a finger, the holding portion 52 moves away from the shaft portion 3 with the connecting portion 54 as a fulcrum, and the shaft portion 3 and the clip body 53 are opened. state.

Next, a method of clamping a member to be fixed through which a screw is inserted between the shaft portion 3 and the clamping member 5 will be described. As shown in FIG. 3, the member to be fixed in the first embodiment is a ceramic indexable insert 7 that is attached to a holder 6 of an indexable cutting tool 9 . Although the throwaway tip 7 in this example has a substantially rhombic shape in plan view, the shape of the throwaway tip 7 is not limited to this, and may be triangular in plan view, for example. Also, the material of the throwaway tip 7 is not limited to ceramic, and may be other materials such as metal.

As shown in FIG. 3 , the throwaway insert 7 has a rake face 71 , a flank face 72 , and a cutting edge 73 formed on the ridgeline where the rake face 71 and the flank face 72 intersect. The corners 74 are corner portions of the rake face 71, and the corners 74 on both the upper and lower surfaces are arranged in turn at the use position, and the indexable insert 7 is discarded after all the cutting edges 73 have been used.

The indexable tip 7 of this example is attached to the holder 6 by a screw clamp method. In this method, the indexable insert 7 is placed on the insert mounting surface 61 at the tip of the holder 6, and the positions of the screw hole 61 formed in the insert mounting surface 61 and the screw hole 75 formed in the rake surface 71 are adjusted. are aligned, and the throwaway tip 7 is fixed to the holder 6 by inserting the screw 8 into the screw hole 75 and tightening it.

When the throwaway insert 7 as described above is attached to the holder 6 using the screw tightening tool 1 of this embodiment, as shown in FIG. The shaft portion 3 and the clip body 53 are opened. In this state, the screw 8 is inserted through the screw hole 75 of the indexable tip 7 and the engaging portion 31 of the screw tightening tool 1 is engaged with the head of the screw 8 . When the position is aligned so that the V-shaped trough portion of the clamping portion 52 abuts against the corner 74 and the pressure on the pressing portion 53 is released, the indexable insert 7 is released as shown in FIGS. , the shaft portion 3, the screw 8, and the clamping portion 52 with a predetermined pressure. In this manner, the throwaway tip 7 through which the screw 8 is inserted can be elastically held between the shaft portion 3 and the holding member 5 . At this time, since the clamping member 5 is connected to the support member 4 which is rotatable with respect to the shaft portion 3, the shaft portion 3 is rotated while the throwaway tip 7 is clamped, and the screw 8 is tightened. can do.

When removing the insert 7 from the holder 6 , the pressing portion 53 is pressed to open the clamping portion 52 and the engaging portion 31 , and the engaging portion 31 is engaged with the head of the screw 8 . match. After that, the pressure on the pressing portion 53 is released, and the V-shaped valley portion of the clamping portion 52 is brought into contact with the corner 74 to clamp the throwaway chip 7 . By rotating the shaft portion 3 and loosening the screw 8 in this state, the indexable tip 7 can be removed from the holder 6 while the indexable tip 7 is held by the screw tightening tool 1 . Therefore, according to the present invention, it is possible to provide a screw tightening tool capable of holding a screw and a member to be fixed through which the screw is inserted, and to prevent the screw and the member to be fixed from falling during attachment and detachment. .

Next, a second embodiment will be described. As shown in FIG. 6, in the second embodiment, the screw tightening tool 1 is provided with a holding member 5 made of resin. The holding member 5 of the second embodiment is entirely made of resin, and has a clip body 53 in which a substantially central portion is bent in a V shape with an obtuse angle when viewed from the side, and a and a connecting portion 54 which is a convex portion. The clip body 53 includes a pressing portion 51 extending in a direction away from the shaft portion 3 toward the end on the base end side from the bent portion, and a holding portion 52 extending substantially parallel to the shaft portion 3 on the distal end side from the bent portion. and In addition, the connecting portion 54 of this embodiment is provided at a position closer to the base end than the bent portion, and the connecting portion 54 is engaged with the bearing hole 424 formed in the arm portion 423 of the support member 4, whereby the holding portion is held. The member 5 is rotatably supported on the arm portion 423 with the connecting portion 54 as a support shaft.

The support member 4 of the second embodiment consists of a proximal side support member 41 and a distal side support member 42 . By inserting the shaft portion 3 into the shaft hole 411 formed in the center of the proximal side support member 41 and the shaft hole 421 formed in the distal side support member 42 , the support member 4 is moved with respect to the shaft portion 3 . It is rotatably attached. The distal support member 42 has two arm portions 423 extending in one direction from the side surface and facing each other. A bearing hole 424 for receiving the connecting portion 54 is formed in the arm portion 423 , and the holding member 5 supports the connecting portion 54 with respect to the arm portion 423 by pivotally supporting the connecting portion 54 in the bearing hole 424 . It is rotatably supported as a shaft.

In addition, the distal end side support member 42 of the second embodiment can be horizontally divided into two at approximately the center of the shaft hole 421 . Further, as shown in FIG. 7, a convex portion 412 is formed on the bottom of the proximal side support member 41, and a concave portion 422 that engages with the convex portion 412 is formed inside the distal side support member 42. there is The proximal side support member 41 and the distal side support member 42 are connected by engaging the convex portion 412 and the concave portion 422 . For this reason, first, the shaft portion 3 is inserted through the proximal side support member 41, and then the distal side support member 42, which has been divided into two parts, is joined so that the concave portion 422 sandwiches the convex portion 412 between them. can be concatenated.

Further, as described above, the holding member 5 of this embodiment is made of resin and does not have elasticity by itself like a leaf spring. Therefore, for example, if the pressing portion 51 is pressed from the shaft portion 3 side by the pressing pin 55 and the spring 56, the clamping portion 52 at the tip is pressed against the engaging portion 31, and the member to be fixed can be elastically clamped. state.

In the example shown in FIG. 7 , the pressing pin 55 is supported by the base end support member 41 . The base end side support member 41 of the second embodiment is a substantially cylindrical member, and includes a shaft hole 411 through which the shaft portion 3 is inserted and a support hole through which the pressing pin 55 is inserted in a direction perpendicular to the shaft hole 411 . 413. Further, the pressing pin 55 of the embodiment has a cylindrical shaft 551, and the shaft 551 is formed with an elongated hole 552 through which the shaft portion 3 is inserted. After the pressing pin 55 is inserted through the support hole 413 of the base end side support member 41, the positions of the shaft hole 411 and the long hole 552 are aligned, and the shaft portion 3 is inserted through these holes. The pressing pin 55 through which the shaft portion 3 is inserted is slidable in the direction orthogonal to the shaft portion 3 within the range of the longitudinal dimension of the elongated hole 551 .

A spring 56 is provided between the pressing pin 55 and the pressing portion 51, and by pressing the pressing pin 55 toward the pressing portion 51, the clamping portion 52 on the distal end side is urged to be pressed against the engaging portion 31. It becomes possible to elastically clamp the member to be fixed. On the contrary, by pressing the pressing portion 51 toward the shaft portion 3 with a finger, the shaft portion 3 and the clip body 53 can be opened.

As a procedure for assembling the support member 4, the clamping member 5, and the pressing pin 55 of the second embodiment to the shaft portion 3, first, the pressing pin 55 is inserted into the proximal side support member 41 and then The shaft portion 3 is inserted through the long hole 552, and then the distal end side support member 42, which has been divided into two parts, is fitted so as to sandwich the shaft portion 3 and the convex portion 412 of the proximal end side support member 41, thereby It is connected to the end support member 41 .

Further, as a third embodiment, a screw tightening tool 1 having a clamping member 5 shown in FIG. 8 may be used. The third embodiment is the same as the screw tightening tool 1 of the second embodiment except for the clamping member 5. As shown in FIG. The holding member 5 of the third embodiment is entirely made of resin, and includes a clip main body 53 extending along the longitudinal direction of the shaft portion 3 and a connecting member which is a convex portion formed on the side surface of the clip main body 53 . a portion 54; The pressing portion 51 provided on the base end side of the clip body 53 is formed so as to be inclined in a direction away from the shaft portion 3 from a position near the connecting portion 54 . The clip body 53 is formed by connecting a portion substantially parallel to the shaft portion 3, a portion inclined toward the shaft portion 3, and a portion substantially parallel to the shaft portion 3 from the connecting portion 54 to the tip. A portion of the tip of the clip body 53 that is substantially parallel to the shaft portion 3 serves as a clamping portion 52 capable of elastically clamping the member to be fixed.

The holding member 5 of the third embodiment is also made of resin, and the supporting member 5 alone does not have elasticity. By pressing the pressing portion 51 with , the holding portion 52 can be pressed against the engaging portion 31 to hold the member to be fixed.

Although the present invention has been described above using the embodiments as examples, the present invention is not limited to the above-described embodiments, and various aspects are possible. For example, the support member 4 of the first embodiment may have a shape that can be divided into a proximal end side and a distal end side, and the holding member 5 may be attached by sandwiching the connecting portion 54 between these members. The connecting portion 54 is formed as a hole through which a support shaft can be inserted, and the shaft inserted through the connecting portion 54 is received by the bearing hole 424 of the support member 4, so that the holding member 5 is pivotally supported by the support member 4. can also

Alternatively, the holding member 5 may be configured to be pressed against the shaft portion 3 by being biased by a torsion coil spring or the like. Moreover, as shown in FIG. 1, the holding portion 52 may be formed by bending the tip. In the example shown in FIG. 1, the tip of the clamping portion 52 is bent in the direction opposite to the shaft portion 3 side. may be formed. When the tip of the clamping portion 52 is formed so as to face the shaft portion 3, it is possible to hold a member to be fixed such as the throwaway tip 7 from below, thereby further suppressing the member to be fixed from coming off. can.

Moreover, the member to be fixed is not limited to the indexable tip 7, and the screw tightening tool 1 can be applied to other members to be fixed. Moreover, although the screw tightening tool 1 of this embodiment is a wrench, it may be a driver.

1 screw tightening tool 2 handle 3 shaft portion 31 engaging portion 4 support member 41 base end side support member 411 shaft hole 412 projection 413 support hole 42 tip side support member 421 shaft hole 422 recess 423 arm portion 424 bearing hole 5 clamping member 51 pressing portion 52 clamping portion 53 clip body 54 connecting portion 55 pressing pin 551 shaft 552 long hole 56 spring 6 holder 61 tip mounting surface 62 screw hole 7 indexable tip 74 corner 75 screw hole 8 screw 9 cutting tool

Claims (5)

a handle;
A screw tightening tool comprising a shaft portion having an engaging portion formed at its tip for engaging with a screw,
a support member that is rotatable with respect to the shaft is provided on the shaft;
A screw tightening tool, wherein the supporting member is provided with a clamping member capable of elastically clamping a member to be fixed through which the screw engaged with the engaging portion is inserted. The holding member is arranged so that a tip end thereof opens and closes with respect to the shaft,
2. The screw tightening tool according to claim 1, wherein a pressing portion provided on the base end side of said clamping member is pressed by a finger to open the tip side thereof. The clamping member has a clamping portion that clamps the member to be fixed on the distal end side,
The screw tightening tool according to claim 1 or 2, wherein the holding portion has a V-shaped cross section perpendicular to the extending direction of the shaft portion. A screw tightening tool according to any one of claims 1 to 3, wherein said clamping member comprises a leaf spring. 4. A screw tightening tool according to claim 2 or 3, wherein said clamping member is made of resin and is closed at the tip side by being pressed by a spring.

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