JPH06226649A - Wrench tool - Google Patents

Abstract

PURPOSE:To improve practicability by supporting a chuck piece, provided with a chuck hole piercingly formed, rotatably on a lever through a unidirectional rotation transmission means, and providing the chuck hole with a lead-in cutout for a clamped component such as a nut in the communicated state. CONSTITUTION:This wrench tool is of such structure that a chuck piece 3 is rotatably supported on a lever 1 through a unidirectional rotation transmission means 4, and the lever 1 is formed into forceps shape vzith a pair of handle levers 1a pivotally supported by a pivot 1b. Chuck piece holding parts 1d provided at the inner peripheries thereof with semi-circular guide walls 1c closed into complete round shape by the closing operation of the handle levers 1a are respectively formed at the tip parts of the handle levers 1a. The chuck piece 3 is provided at its outer periphery with a ring groove slidably fitted to the guide walls 1c, and the outer periphery of the collar edge 3b above is provided with a ratchet 3b with which a feed claw 5 in the unidirectional rotation transmission means 4 is meshed. The chuck piece 3 is further provided with a clamped component lead-in cutout 2a formed being communicated with a chuck hole 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrench tool for rotating tightened parts such as nuts (hereinafter referred to as nuts).

[0002]

2. Description of the Related Art A conventional wrench tool suitable for comparison with the present invention is a so-called box wrench shown in FIG. In the box wrench, the lever b has a cylindrical chuck piece c penetrating through a chuck hole (b) parallel to the axial direction of the nut and rotatably supported via a one-way rotation transmitting means (d) such as a ratchet mechanism. , Its usage is
The chuck hole (b) is fitted in the nut in the axial direction, and the lever (i) is reciprocally moved around the chuck piece (c) as a fulcrum to rotate the chuck piece (c) in the direction for tightening the nut. By pushing and switching to the other side and reciprocating the lever a in the same manner as described above, the chuck piece c is rotated in the direction of loosening the nut.

[0003]

The box wrench described in the prior art is a convenient wrench tool that can quickly rotate the nut while the chuck piece is still fitted to the nut. For example, as shown in FIG. When members A and B, such as pipes and shafts whose both ends are connected to a wall surface, are butt-connected with each other by a nut C, the chuck piece C has an endless ring shape in its cross-sectional shape. Since the structure can be inserted only from the axial direction, the chuck rod cannot be fitted into the nut C. Therefore, the convenient wrench tool cannot be used in the above case, and the chuck part is inevitably rotated by the use of the fixed wrench. Therefore, an object of the present invention is to enable the chuck piece to be inserted from the side (side) of the nut, thereby enabling the rotation operation of the nut shown in FIG. 7 which has been impossible in the past. To do.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a one-way rotation transmission of a chuck piece having a lever bar formed with a chuck hole penetrating through a chuck hole in a direction parallel to an axis of a tightened component such as a nut. In a wrench tool of a type that is rotatably supported via a means, for introducing a tightened part in a direction orthogonal to the axis of the chuck hole, the starting end of which is opened to the outer surface of the chuck piece with a full thickness of the chuck hole. The point is to connect the notches.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 4, a chuck piece 3 having a chuck hole 2 formed through a lever bar 1 at a center thereof in a direction parallel to an axis of a nut is rotated through a unidirectional rotation transmission means 4. In the wrench tool that is freely supported, the chuck hole 2
In addition, a notch 2a for introducing a nut in a direction orthogonal to the axis of the chuck hole 2 having the starting end opened to the outer side surface of the chuck piece 3 to the full thickness of the chuck piece 2 is communicated.

The lever bar 1 referred to above is, in this example, formed into a forceps shape in which a pair of handle rods 1a are pivotally supported by a pivot shaft 1b, and the handle rod 1a is closed at the tip of the handle rod 1a. Each has a holder part 1d for sandwiching a chuck piece, which has a semi-circular guide wall 1c closed in a perfect circular shape by operation on the inner circumference.

The chuck piece 3 is shown in FIGS. 3 and 4 in this example.
As described above, the outer periphery has an annular groove 3a slidably fitted to the guide wall 1c, and upper and lower brim edges 3b and 3c that slidably contact the upper and lower surfaces of the holder portion 1d in the fitted state. Edge 3b
Ratchet 3d is formed on the outer circumference of the ratchet 3
The feed claw 5 that constitutes the one-way rotation transmission means 4 is engaged with d.

The feed claw 5 is engaged with the feed claw 5 by being urged to rotate inward by a support shaft 6 and a plate spring 7 provided in the holder 1d.

[0009]

The operation will be described below with reference to FIG. In addition, FIG. 5 shows a first mode in which the chuck piece 3 is previously removed from the holder portion 1d as shown by a solid line and fitted to the nut.
A second mode in which the chuck piece 3 is fitted to the nut while the chuck piece 3 is attached to the holder portion 1d as shown by an imaginary line is also shown in the same drawing. Therefore, first, as the first operation mode, only the chuck piece 3 is inserted and fitted into a nut (not shown) from the side (side) through the introduction notch 2a, and the chuck piece 3 in the fitted state is opened. The holder 1d is inserted, the guide wall 1c of the holder 1d is aligned with the annular edge 3a of the chuck piece 3, and the handle rod 1a is closed as shown in FIG. The ratchet 3d is automatically engaged with the chuck 3d so that the rotation can be transmitted, and in this state, the handle rod 1a is reciprocated to move the chuck piece 3a.
Is rotated in one direction using the guide surface 1c which is a perfect circle due to the closure of the holder portion 1d as a guide, and the nut is rotated in the tightening direction, for example. It should be noted that the nut can be turned in the loosening direction by turning the tool over and fitting the nut and reciprocating the same as above.

Next, a second operation mode will be described with reference to FIG. First, the holder portion 1d is opened as shown in the figure, and the notch 2a for introducing the chuck piece 3 is directed to the opened opening of the holder portion 1d in one opened holder portion 1d and one of the holder portions 1d is shown as an imaginary line. Temporarily attach to. In addition,
Even in the above-mentioned temporary mounting state, since the half circumference of the annular groove 3a of the chuck piece 3 is engaged with the guide wall 1c, the holder portion 1d.
The chuck piece 3 will not fall out of the holder portion 1d unless it is largely tilted. With the chuck piece 3 temporarily attached to the holder as described above, the notch 2a for introduction is inserted and fitted from the side of the nut, and after fitting, the holder 3 is closed as shown in FIG. Similarly, the nut is rotated by the rotation of the chuck piece 3 by reciprocally moving the handle rod 1a.

In the present embodiment, an example in which the entire circumference of the chuck piece 3 is closed due to the closing of the holder portion 1d has been shown, but the chuck piece 3 is provided between the tip abutting portions of the holder portion 1d when the holder portion 1d is closed. The length of the holder portion may be shorter than that shown in the figure so that a space capable of exposing the introduction notch 2a is formed.

Further, the holder portion 1d may be provided with a slight magnetism to prevent the chuck piece 3 from falling off from the holder portion 1d during a handling operation.

Further, since the wrench tool of the present embodiment is provided with the common lever 1 having the chuck holes 2 having different inner diameters, several kinds of chuck pieces 3 can be combined and set.
In this case, the inner diameter of the guide edge 1c of the holder portion 1d and the outer diameter of the annular groove 3a of the chuck piece 3 may be set to have common dimensions.

Further, in this embodiment, an example of the lever in which the lever 1 is formed in the shape of a forceps is shown, but this is one embodiment and is not limited to this shape and configuration. Similar to the conventional example described in 6, it is also possible to adopt a simple lever shape that does not open and close, and a one-way rotation transmission means.

[0015]

As described above, the present invention has the following effects. (A) Like the conventional box wrench, it is of course possible to rotate the nut by inserting the chuck hole provided in the chuck piece in the axial direction of the tightened component such as the nut in the usual manner to rotate the nut. (B) In particular, according to the present invention, the chuck hole is made to communicate with a notch for introducing a tightened part in a direction orthogonal to the axis of the chuck hole, the start end of which is opened to the outer surface of the chuck piece with a full thickness. Therefore, the tightened component can be fitted into the chuck hole from the side through the introduction notch. Therefore, according to the wrench tool of the present invention, as shown in FIG. It can be effectively used as a turning tool for a tightened part in the case where members such as a shaft are butt-connected to each other.

[Brief description of drawings]

FIG. 1 is a front view of a wrench tool with a holder section closed.

FIG. 2 is a rear view of the above wrench tool.

FIG. 3 is a cross-sectional view of a holder portion holding a chuck piece.

FIG. 4 is an exploded perspective view of a wrench tool.

FIG. 5 is a front view showing an operation mode of the wrench tool.

FIG. 6 is a perspective view of a conventional wrench tool (glass wrench).

FIG. 7 is an explanatory diagram when a pipe and a shaft are butted and connected with a nut.

[Explanation of symbols]

 1 Lever 2 Chuck hole 3 Chuck piece 2a Notch for introduction

Claims (1)

[Claims] 1. A wrench tool of a type in which a chuck piece having a chuck hole penetratingly formed in a lever rod through a chuck hole in a direction parallel to an axis of a tightened component such as a nut is rotatably supported by a one-way rotation transmitting means. A wrench tool characterized in that a notch for introducing a tightened component in a direction orthogonal to the axis of the chuck hole, which has a starting end opened to the outer side surface of the chuck piece with a full thickness, is communicated with the chuck hole.