JP2019005886A - Detachable screw holding tool for driver - Google Patents

Abstract

To provide a screw holding tool for an electric driver and a manual driver by which size exchange can be easily performed by one-hand and in which rotation of the holding tool stops when a load is applied to the holding tool.SOLUTION: A screw holding part is made detachable by magnetically attaching a main body attachment part of "a" and a cylindrical screw holding part of "b" at a smooth surface. When a load is applied to the screw holding part of "b", the screw holding tool stops rotation of the cylindrical screw holding part of "b".SELECTED DRAWING: Figure 1

Description

  The present invention relates to a screw holder for electric and manual drivers, in which a main body can be easily attached to and detached from a front part and a rear part by magnetic force.

  When tightening a screw that does not work with a magnet using a screwdriver, to prevent the screw from coming off the driver or dropping when tightening, hold it with a claw-shaped protrusion on the tip of the driver, There has been proposed a screw holder in which a screw is inserted and held inside an elastic member.

Shokai 54-797 Japanese Utility Model Publication No. 53-163797 JP 2014-233810 A Shokai 56-15665

Patent Document 1 discloses a screw holder that holds a screw with elastic claw-like screw scissors.
However, this screw holder always rotates with elastic claw-like screw scissors exposed. As a result, there is a problem that a mark is likely to remain on a member for fastening the screw. In addition, because of its structure, it cannot be applied to short driver shafts, so there is a problem that it cannot be mounted on short driver shafts such as precision drivers and electric drivers.

Patent Document 2 discloses a screw holder in which a coil spring is attached and fixed to a driver shaft so that a cylindrical screw holder can be moved forward and backward.
However, since the cylindrical screw holding portion is always rotating in this screw holder, there is a problem that a mark is likely to remain on a member that fastens the screw, such as when the screw is idle, in an electric driver that rotates at high speed. In addition, when the cylindrical screw holding portion stops rotating due to friction with a member that fastens the screw, the portion fixed to the driver shaft continues to rotate, and thus the holder itself is damaged. There is also a problem that the holder must be replaced and re-installed depending on the type and size of the screw.

In Patent Document 3, a vertical slit is formed in a screw holding portion made of a cylindrical elastic body that can be fitted to the tip end portion of a driver shaft, and the slit portion is widened by the centrifugal force of the rotation of the driver. A screw holder is disclosed in which the end of the screw holding portion is not sandwiched between the screw and a member for fastening the screw when tightening.
However, this screw holder always rotates when the screw is tightened, so that the widened slit part is exposed and rotated, so when the member that tightens the screw is not flat or the projection is close to the member that tightens the screw. The expanded slit portion hits a member or a protrusion, and there is a problem that the holder itself is easily damaged in a high-speed electric driver.

Patent Document 4 discloses a screw holder that disassembles a main body into a front part of a screw holding part and a rear part of the main body attaching part, and connects the front part and the rear part with a retaining ring.
However, since the cylindrical screw holding part is always rotating in this screw holder, there is a problem that a mark is likely to remain on a member that fastens the screw, such as when the screw is idle, in an electric driver that rotates at high speed. In addition, due to the structure, there is a problem that it cannot be mounted on a short driver shaft such as a precision driver or an electric driver.

  According to the first aspect of the present invention, a cylindrical screw holding portion composed of a cylindrical elastic member and a ring-shaped magnetized body, and a cylindrical fixing portion are attached to the elastic body so as to advance and retreat in the driver shaft direction. A detachable screw holder for a driver, characterized in that a magnetic body is attached to a surface of the main body mounting portion that opposes the screw holding portion, and the screw holding portion is detached from the main body mounting portion.

  According to the second aspect of the present invention, the cylindrical screw holding portion and the main body mounting portion are magnetically attached to either the smooth surface or one of the cylindrical screw holding portion and the main body mounting portion on the smooth surface. The detachable screw holder for a driver according to claim 1, wherein the screw holding portion is prevented from rotating.

  The invention according to claim 3 can hold the terminal to which the electric wire is connected by making a cut in the cylindrical elastic member of the cylindrical screw holding portion. It is a screw holder.

  According to a fourth aspect of the present invention, the screw holder can replace the cylindrical screw holding portion to hold the washer and the like together with the screw and tighten the screw. It is a holding tool.

    The invention according to claim 5 is characterized in that the screw holder can fix the main body mounting portion to the driver and perform the work of tightening the screw while removing the cylindrical screw holding portion. It is a detachable screw holder for use.

  According to the present invention, since the cylindrical screw holding portion and the main body mounting portion are magnetically attached, they can be easily attached and detached, and when the cylindrical screw holding portion is subjected to friction or resistance, the cylindrical screw holding portion Only stops rotation and is less likely to break. Similarly, even if there is a protrusion at the place where the screw is tightened, it is not easily damaged without being caught, and the work can be performed with the main body mounting part attached without attaching the cylindrical screw holding part. In addition, a cylindrical screw holder can be attached only when it is necessary to hold the screw.

  Sectional view showing the state where the screw is held by attaching the holder to the driver   A perspective view showing a state in which a holding tool is attached to a driver and a screw is held.   Perspective perspective view showing the operation of holding the screw while the screw is inserted into the round crimp terminal with the electric wire attached   Enlarged view of the part holding the screw in the state where the screw is inserted through the round crimping terminal with the wire shown in FIG.   Cross-sectional view showing a state where the screw is replaced with a cylindrical screw holder that matches the outer diameter of the washer, and is attached to the spring washer and plain washer.   A perspective view showing a combination of a magnetic holder with a magnetic claw, a magnet ring and a coil spring   The perspective view which shows the combination of the magnet holder with a nail | claw which lets magnetism pass, a cylindrical elastic member, and a spherical magnet   The perspective view which shows the state which couple | bonds the magnetic attachment body with a nail | claw with a cylindrical elastic member.   The perspective view which shows the state which couple | bonds the magnetic attachment body with a collar to a cylindrical elastic member   A perspective perspective view showing a state in which a cylindrical elastic member or an elastic member obtained by subdividing a cylindrical elastic member in a longitudinal direction is coupled to a magnetized body having a shape of a ring type and a cylindrical type.   The perspective view which shows the state which couple | bonds a fan-shaped magnetic attachment body with a nail | claw, and a cylindrical elastic member.   Perspective perspective view showing a state in which a pin type magnetic body and a cylindrical elastic member are coupled together   A perspective view of the screw holding part, combining an elastic member with a thin tip and a magnetic attachment   Perspective perspective view of a screw holding portion combining a frustoconical elastic member having a frustoconical inner hole and a magnetic body.   A perspective view of the screw holding part, which combines an elastic member with a cylindrical inner hole expanded in a truncated cone shape and a magnetic attachment.

The first embodiment will be described below with reference to FIGS.
1 and 2 are views showing a state in which a holder is attached to a driver and a screw is held. In FIG. 1, a is a main body mounting portion, which is composed of 1 driver shaft fixing portion, 2 set screws, 3 elastic bodies, and 4 magnetic bodies.
The driver shaft fixing portion 1 has a cylindrical shape, and the inner diameter of the driver shaft fixing portion is larger than the outer diameter of the driver shaft. The driver shaft fixing part is preferably made of durable metal such as iron, brass or stainless steel.
Reference numeral 2 denotes a set screw, which is a set screw for fixing the driver shaft fixing portion 1 to the driver shaft. In the first embodiment, one part of the driver shaft is fixed with one set screw. However, the driver shaft may be fixed at multiple locations with multiple set screws.
Reference numeral 3 denotes an elastic body. In the first embodiment, a coil spring is used in order to emphasize durability on the premise of using an electric screwdriver. However, in the case of a small screw such as a precision screwdriver, a foamed rubber, a cylindrical elastic body such as rubber and silicon may be used.
Reference numeral 4 denotes a ring-shaped magnetic body. In this embodiment 1, a magnet ring is used. The magnet ring is bonded to the elastic body 3 with an adhesive. However, it may be bonded with an adhesive or adhesive tape.
FIG. 1B shows a cylindrical screw holding portion, which is composed of 5 magnetic adherends and 6 cylindrical elastic members and has a cylindrical shape.
Reference numeral 5 denotes a magnetized body, which is magnetically attached to a ring made of magnet which is a ring-shaped magnetic body of 4.
In this embodiment, since an iron flat washer is used for the magnetized body 5, the magnetized surface with the magnet ring, which is the ring-shaped magnetic body 4, becomes a smooth surface and a screw holding portion b. When a load is applied to the magnet, the magnetized surface is detached to prevent rotation.
Reference numeral 6 denotes a cylindrical elastic member that is bonded to the magnetic adhering body 5 with an adhesive. However, a cylindrical elastic body such as rubber or silicon may be used.
The cylindrical elastic member 6 and the coil spring which is the elastic body 3 are compressed when screwing. At this time, since the cylindrical elastic member 6 is deformed, the end portion of the cylindrical elastic member 6 is easily sandwiched between the screw and the member to which the screw is tightened, and is easily damaged.
In order to avoid breakage, an elastic member having a cylindrical elastic member 6 having a smaller deflection than the elastic body 3 is used. When the compression force is applied to the cylindrical elastic member 6 and the elastic body 3, the compression force applied to the cylindrical elastic member 6 is reduced by the elastic body 3 being bent before the cylindrical elastic member 6. And avoiding deformation.
A screw holder is formed by magnetizing the body mounting portion a and the cylindrical screw holding portion b.
In Example 1, since the inner hole diameter of the cylindrical elastic member 6 is smaller than the outer diameter of the screw head and larger than the outer diameter of the driver shaft, when the screw is inserted into the inner hole of the screw holding portion, the elastic force of the elastic member causes The screw is held.

A second embodiment will be described below with reference to FIGS.
In Example 2, since the screw is not directly held by the screw holding portion, a screw holding portion having an inner hole diameter larger than the outer diameter of the screw head is used.
Reference numeral 7 denotes a slit placed at the tip of the screw holding portion in the screw direction for holding a round crimp terminal to which 12 electric wires are coupled.
A screw is inserted into the insertion hole of the 12 round crimp terminal and is loosely inserted into the inner hole of the screw holding portion, and a crimp part where the 12 round crimp terminal and the electric wire are coupled is sandwiched in the slit 7. Accordingly, the 12 round crimp terminals and the screws are held only by the crimp portion sandwiched between the seven slits.

Embodiment 3 will be described below with reference to FIG.
Reference numeral 10 denotes a spring washer. 11 is a flat washer. b is a cylindrical screw holding portion, and since the inner hole is small in the screw holding portion of the first embodiment and a washer or the like cannot be inserted, the screw holding portion is a cylinder having an inner hole slightly smaller than the outer diameter of 11 plain washers. The screw holder is replaced.
Insert the screw through the 10 spring washer and 11 plain washer, insert the screw, 10 spring washer and 11 flat washer together into the cylindrical screw holder of b, and fit the screw tip to the driver tip. Let
Since the 11 plain washers are held by the elastic force of the screw holding portion, the screws and the 10 spring washers are also held together and can be tightened.

Hereinafter, the shapes of the magnetically attached body and the elastic body of the main body mounting portion different from the first embodiment will be described with reference to FIGS. 6 and 7.
In FIG. 6, 3x is a coil spring. 4k is a magnet ring. j is a magnet holder with claws to pass magnetism, 3x coil spring and 4k magnet ring are placed on top of each other, and the magnet holder with claws to pass magnetism j is fitted into the 4k magnet ring and coupled. Let The claw of the magnet holder with claw that passes the magnetic field of j is bent inward and the steel wire portion of the 3x coil spring is clamped or wound, whereby the magnet holder with claw that passes the magnetic field of 3x and the magnetic field of j It becomes possible to further strengthen the bond.
It is also possible to change the 3x coil spring to a cylindrical elastic body.
7y of FIG. 7 is a cylindrical elastic body. m is a spherical magnet with a claw that passes j magnetism on the side of the 3y cylindrical elastic body so that a plurality of magnets are arranged and sandwiched between the 3y cylindrical elastic body and the magnet holder with claw that passes j magnetism. Fit the magnet holder and join. Further, the coupling can be further strengthened by bending the claws of the magnet holder with claws for passing the magnetism j inwardly and sandwiching the claws.
In addition, the spherical magnet of m can be changed to a magnetic body having another shape such as a cylindrical shape, a square shape, or a rod shape.

Hereinafter, a magnetic attachment body having a cylindrical screw holding portion different from that of the first embodiment will be described with reference to FIGS.
In FIG. 8, g is a magnetic attachment with a claw, and is fitted to the 6 cylindrical elastic member. Moreover, it is also possible to couple | bond the nail | claw part of the magnetic attachment body with a nail | claw by bend | folding in the side surface direction of the 6 cylindrical elastic member.
FIG. 9d shows a magnetized body with a collar, which is a shape obtained by extending the inner circle portion of the magnetically bonded body of 5 described in Example 1 into a cylindrical shape in the vertical direction. s is the height of the magnetized body cylindrical portion with the collar, t is the height of the cylindrical elastic member, and u is the height of the screw head. In order to hold the screw head with the 6 cylindrical elastic member, the height of the cylindrical magnetic part with the collar of s is obtained by subtracting the height of the screw head of u from the height of the cylindrical elastic member of t. Must be shorter than the length.
E in FIG. 10 is a magnetized body having a ring shape and a cylindrical shape, and the outer circular portion of the magnetized body of 5 described in the first embodiment is formed into a cylindrical shape in the vertical direction. . v indicates the cylindrical height of the magnetized body of e. In order to easily hold the screw with the cylindrical elastic member, it is desirable that the height of v is shorter than the height of the cylindrical elastic member of t.
6a is an elastic member obtained by subdividing the cylindrical elastic member 6 in the vertical direction, and can be coupled to a magnetized body having a shape combining the ring shape and the cylindrical shape of e. However, since it cannot be fitted, it is bonded with an adhesive or an adhesive.
Reference numeral h in FIG. 11 denotes a fan-shaped magnetic attachment with a claw, which can be magnetically attached to the main body attachment portion by being horizontally aligned and coupled to the attachment surface of the cylindrical elastic member 6.
In FIG. 12, f is a pin type magnetic body, and is inserted into and coupled to the mounting surface of the 6 cylindrical elastic member.

Hereinafter, a screw holding portion different from that of the first embodiment will be described with reference to FIGS.
Reference numeral k2 in FIG. 13 is a cylindrical elastic member with a thin tip, which has the same inner diameter as that of the magnetic adhering member 5 and has an outer diameter smaller than the outer diameter of the magnetic adhering member, so that it is hidden by the cylindrical elastic member during operation. It is possible to reduce the area of the screw fastening member that cannot be seen from the cylindrical screw holding portion of the first embodiment. Therefore, the screw holding portion that combines the cylindrical elastic member with the narrow tip of k2 and the magnetized body is suitable for a driver using a small screw such as a precision screwdriver that performs fine work.
K3 in FIG. 14 is a frustoconical elastic member having a frustoconical inner hole, which is coupled to the magnetic adhering body 5 and spreads in a frustoconical shape in the tip direction. It is possible to hold a large head screw or washer.
In FIG. 15, k4 is an elastic member in which a cylindrical inner hole is expanded in a truncated cone shape. Since only the inner hole portion extends in a truncated cone shape in the distal direction, it is possible to hold a larger head screw or washer than the cylindrical screw holding portion of the first embodiment.
If the cylindrical elastic member has a cylindrical shape, the outer shape can be a polygonal shape.

  In Embodiments 1 to 3, the main body mounting portion has a magnetic body and the cylindrical screw holding portion has a magnetic body, but the main body mounting portion has a magnetic body and has a cylindrical shape. A shape having a magnetic body in the screw holding portion and a combination having a magnetic body in both the main body mounting portion and the cylindrical screw holding portion may be used.

  Even in a poor working environment, the screw holder can be easily replaced with one hand, improving work efficiency.

DESCRIPTION OF SYMBOLS 1 Driver shaft fixing | fixed part 2 Set screw 3 Elastic body 3x Coil spring 3y Cylindrical elastic body 4 Ring-shaped magnetic body 4k Magnet-made ring 5 Magnetic attachment body 6 Cylindrical elastic member 6a The cylindrical elastic member of 6 is longitudinally arranged Subdivided elastic member 7 Slit 10 Spring washer 11 Flat washer 12 Round crimping terminal a Body mounting part b Cylindrical screw holding part d Magnetic attachment body with collar e Magnetic attachment body with ring shape and cylindrical shape combined f Pin-shaped magnetized body g Magnetized body with claws h Fan-shaped magnetized body with claws j Magnet holder with claws to pass magnetism s Height of magnetized body cylindrical portion with collars t Height of cylindrical elastic member U The height of the screw head height ve The cylindrical height of the magnetized body k2 The cylindrical elastic member with a thin tip k3 The elastic member with a truncated cone having a wide tip k4 The elastic member with a truncated cone shape m Spherical magnet

Claims (5)

  Cylindrical screw holding part composed of a cylindrical elastic member and a magnetized body, and the cylindrical shape of the main body mounting part in which a cylindrical driver shaft fixing part is attached to the elastic body in order to be able to advance and retreat in the axial direction of the driver By attaching a magnetic body to the surface facing the screw holding portion of the cylinder and attaching the magnetic body of the cylindrical elastic member and the magnetic body of the screw holding portion, the cylindrical screw holding portion is detached from the main body mounting portion. A detachable screw holder for a driver characterized by being made possible.   A cylindrical screw holding part is provided by magnetizing the opposing surfaces of the magnetic holding body of the screw holding part or the magnetic body of the main body mounting part with either one or the other being a smooth surface. The detachable screw holder for a driver according to claim 1, wherein:   3. A cylindrical elastic member of a screw holding portion is cut to enable holding of a terminal to which an electric wire is connected, and the screw can be tightened together with the held screw. Detachable screw holder for driver as described.   4. The detachable screw holder for a driver according to claim 1, wherein the screw holder is capable of holding a washer and the like together with the screw and tightening the screw by exchanging a cylindrical screw holding portion.   5. The detachable screw holder for a driver according to claim 1, wherein the screw holder can fix the main body mounting portion to the driver and perform a screw tightening operation with the cylindrical screw holding portion removed.

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