JPH11151677A - Hook spanner with fixing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hook spanner with fixing tool which can engage a pawl of the hook spanner in a groove or a hole provided in a tightening member such as a nut and a collet chuck surely to tighten it in a good condition. SOLUTION: A pawl 1c is provided on an inner peripheral face of an end part on handle side of a circular arc part 1b of a hook spanner 1. A circular arc opening part 4b is formed on an outer peripheral face 4a of a fixing tool 4 made of a hollow cylindrical member, and a length of the circular arc is longer than a length of the circular arc of the circular arc part 1b of the hook spanner 1. An end part on open side of the circular arc part 1b of the hook spanner 1 is nipped in one end of an opening part 4a of the fixing tool 4, a support pin 5 is inserted through an insertion hole 4e on one side of the fixing tool 4, an insertion hole 1d of the hook spanner 1, and an insertion hole 4f on the other side of the fixing tool 4, and the hook spanner 1 is fixed on the fixing tool 4 using the support pin as a support point in a condition in which both are held so as to turn freely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook spanner with a fixing tool.

[0002]

2. Description of the Related Art When a tightening member such as a bolt head or a nut is rotated and fixed by a wrench, a contact surface between the wrench and the bolt head or a nut may slip and the wrench may be difficult to rotate. In such a case, a hook spanner as shown in the schematic perspective view of FIG. 4 is used. In the example shown in FIG. 4, the hook spanner 1 has an arc-shaped portion 1b at the tip of the handle 1a.
And a hook-shaped pawl 1c is formed on the inner peripheral surface of the open end of the arc-shaped portion 1b.

FIG. 5 is a schematic perspective view showing an example in which a hook spanner 1 having the structure shown in FIG. 4 is used and a collet chuck is turned by a hook spanner to tighten and fix a tool such as a cutting blade. It is. In FIG. 5, reference numeral 2 denotes a collet chuck, and a plurality of grooves 2a are provided at equal intervals on an outer peripheral surface of the collet chuck which comes into contact with the hook spanner 1. Also,
A collet 2b for holding the tool 3 is provided at one end, and a fixed portion 2c to be attached to a machine tool such as a lathe is formed at the opposite end.

When the hook spanner 1 is used, a groove 2a formed on an outer peripheral surface of the collet chuck 2 is formed on an inner circumferential surface of an open end of the arc-shaped portion 1b of the hook spanner 1. The claw 1c is hooked and engaged, and the outer periphery of the collet chuck 2 is rotated in a tightening direction by a predetermined distance by applying a force to the handle 1a and turning it. Next, the pawl 1c is removed from the groove 2a, and the pawl 1c is engaged with a groove formed at another position on the outer peripheral surface of the collet chuck 2 to apply force to the handle 1a and rotate the handle 1a in the same direction. Hereafter, the first one
By changing the position of the groove engaged with c and applying a force to the handle 1a and turning it in the same direction, the tightening force on the tool 3 is increased, and the tool 3 is fixed to the collet chuck 2.

[0005]

As described above, even when a hook spanner having a claw that engages a groove formed on the outer peripheral surface of the fastening member is used, the hook spanner is attached to the outer peripheral surface of the fastening member. When making contact, the hook wrench is not mechanically fixed, so that the nail may slide from the groove position and the nail and the groove may not be engaged.
For this reason, there has been a problem that a fastening member such as a nut or a collet chuck cannot be rotated by a hook spanner, and fastening may not be performed stably.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a nail or a collet chuck. An object of the present invention is to provide a hook spanner with a fixing tool that can stably perform fastening by rotating a fastening member with a hook spanner.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hook-type wrench with a fixing tool, which has an arc-shaped portion formed at the tip of a handle, and a plurality of engaging portions provided on an outer peripheral surface of a fastening member. A hook spanner having a hook to be engaged provided on an inner peripheral surface of the arc-shaped portion; and an arc-shaped spanner having an arc length longer than the arc-shaped portion of the hook spanner on the outer peripheral surface of the hollow cylindrical member. An opening is formed, and a fixing tool is fitted to the outer peripheral surface of the fastening member. A hook spanner is held at one end of the opening of the fixing tool, and the fixing means is rotatably fixed in a two-sided state by the fixing means. This is achieved by adopting a configuration.

According to the above-mentioned feature of the present invention, the engagement formed on the outer peripheral surface of the tightening member in a state where the fixing member formed of the hollow cylindrical member is fitted to the outer peripheral surface of the tightening member such as a nut or a collet chuck. The hook of the hook spanner is engaged with the engaging portion at a position corresponding to the opening of the fixture in the portion, so that the nail is securely engaged with the engaging portion. For this reason,
The fastening by turning the fastening member with the hook spanner can be performed stably.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hook spanner with a fixing tool according to an embodiment of the present invention.
FIG. 1 is an exploded perspective view showing a schematic configuration of a hook spanner with a fixing device according to the present invention. The same or corresponding portions as those in the conventional example of FIG. 4 are denoted by the same reference numerals, and a detailed description thereof will be omitted to avoid duplication. An insertion hole 1d for a support pin 5 to be described later is formed on the surface of the open end of the arc-shaped portion 1b of the hook spanner 1. The claw 1c is provided on the inner peripheral surface of the handle-side end of the arc-shaped portion 1b.

Reference numeral 4 denotes a fixture made of a hollow cylindrical member, which has an arc-shaped opening 4b formed on an outer peripheral surface 4a.
The length of the arc of the arc-shaped opening 4b is selected to be longer than the length of the arc of the arc-shaped portion 1b of the hook spanner 1. Further, insertion holes 4e and 4f for the support pins 5 are provided at symmetrical positions of the end surfaces 4c and 4d on both sides of one end of the opening 4b.

An end of an arc-shaped portion 1b of the hook spanner 1 is held at one end of an opening 4a of the fixture 4, and an insertion hole 4e formed in one end surface 4c of the fixture 4 and an insertion hole of the hook spanner 1 are formed. 1d, an insertion hole 4 formed in the other end face 4d of the fixture 4
The support pin 5 is inserted through f, and is hooked on the fixture 4 to fix the spanner 1 rotatably with the support pin 5 as a fulcrum.

FIG. 2 is a schematic side view showing a state in which the fixture 4 is fitted to the outer peripheral surface of the collet chuck 2 in a partial cross section. FIG. 2 shows that the hook spanner 1 is rotatably fixed to the fixture 4 by the support pins 5 in a state where the hook spanner 1 is held at both ends, and then the fixture 4 is fitted to the outer peripheral surface of the collet chuck 2 and A state is shown in which the handle 1a is turned to bring the inner peripheral surface of the arc-shaped portion 1b into contact with the outer peripheral surface of the collet chuck 2, and the pawl 1c is engaged with a groove 2a formed on the outer peripheral surface of the collet chuck 2. The groove 2a has a rectangular cross section and is formed at an appropriate depth so that the pawl 1c is engaged. Note that a hole having an appropriate depth may be provided on the outer peripheral surface of the fastening member instead of providing the groove 2a having a rectangular cross section as an engagement portion with the pawl 1c.

The length of the arc of the arc-shaped opening 4b of the fixture 4 is selected to be longer than the length of the arc of the arc-shaped portion 1b of the hook spanner 1. For this purpose, as shown in FIG. 2, when the hook spanner 1 is fixed to the fixture 4 with the support pins 5 in a double-supported state and the fixture 4 is fitted to the outer peripheral surface of the collet chuck 2, the fixture 4 A gap T1 between both ends of the arc-shaped opening 4b and the both ends of the arc-shaped portion 1b of the hook spanner 1.
T2 is formed. The gap T1 is provided as a space necessary for rotating the handle 1a of the hook spanner 1 toward or away from the outer peripheral surface of the collet chuck 2 with the support pin 5 as a fulcrum.

In the groove formed on the outer peripheral surface of the collet chuck 2 as shown in FIG. 2, the handle is engaged with the groove 2a and the pawl 1c at a position corresponding to the opening 4b of the fixture 4. When a force in the direction of arrow R is applied to 1a, the collet chuck 2 rotates in the tightening direction by a distance corresponding to the gap T2, and the inner peripheral surface end of the arc-shaped portion 1b of the hook spanner 1 is opened. 4b and comes to a stop. That is, the gap T2 is provided as a space for performing the turning operation of the fastening member by the hook spanner 1.

FIG. 3 is a schematic perspective view of an example in which the hook spanner 1 is fixed to the fixture 4 having the above-described configuration and the tool 3 is attached to the collet chuck 2 shown in FIG. Since the hook spanner 1 is fixed to the fixture 4 with the support pins 5 in a two-sided state, the handle 1 a is required to operate the hook spanner 1.
When the force is applied, the hook spanner 1 does not move in a direction parallel to the axial direction of the collet chuck 2, and the mounting state of the hook spanner 1 is stable.

For this reason, it is possible to reliably engage the claw 1c of the hook spanner 1 with the groove of the groove 2a formed on the outer peripheral surface of the collet chuck 2 corresponding to the opening 4b of the fixture 4. The collet chuck 2 can be rotated by the handle 1a of the hook spanner 1 to stably tighten the tool 3 by the collet chuck 2.

In the above example, the hooking wrench with the fixing tool is attached to the collet chuck to perform the turning action. However, the application example of the hooking wrench with the fixing tool of the present invention is not limited to this. The present invention can be applied to a structure in which a groove or a hole engaging portion is provided on the outer peripheral surface of a tightening member such as a bolt head or a screw so as to be engaged with a hook of a spanner.

[0018]

As described in detail above, according to the present invention, the fixing member made of a hollow cylindrical member is fitted to the outer peripheral surface of a tightening member such as a nut or a collet chuck, and is fixed to the outer peripheral surface of the tightening member. Since the hook of the hook spanner is engaged with the engaging portion at a position corresponding to the opening of the fixture among the formed engaging portions, the nail is securely engaged with the engaging portion.
For this reason, the fastening by turning the fastening member with the hook spanner can be stably performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a hook spanner with a fixture according to an embodiment of the present invention.

FIG. 2 is a side view showing a partial cross section when a hook spanner with a fixture according to the embodiment of the present invention is attached to a fastening member.

FIG. 3 is a schematic perspective view when a hook spanner with a fixture according to the embodiment of the present invention is attached to a fastening member.

FIG. 4 is a perspective view of a conventional example of a hook spanner.

FIG. 5 is a perspective view of a conventional example when a hook spanner is attached to a fastening member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook spanner 1a Handle 1b Arc-shaped part 1c Claw 1d Insertion hole 2 Collet chuck 2a Groove 3 Tool 4 Fixture 4a Outer circumference 4b Opening 5 Support pin

Claims (1)

[Claims] An arcuate portion is formed at the tip of a handle, and a hook is provided on an inner peripheral surface of the arcuate portion, the pawl being engaged with a plurality of engaging portions provided on an outer peripheral surface of the fastening member. A fixture having a wrench and an arc-shaped opening having an arc length longer than the arc-shaped portion of the hook spanner formed on the outer peripheral surface of the hollow cylindrical member, and being fitted to the outer peripheral surface of the fastening member. A hook spanner with a fixture, wherein the arc-shaped portion of the hook spanner is held at one end of the opening of the fixture, and is rotatably fixed in a two-sided state by a fixing means.