JP2002254332A - Socket for impact wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a reliable and easy visual observation of whether a socket for an impact wrench is rotated or stopped, or ensure reliable tightening of one nut in locking using a double nut. SOLUTION: The socket A has an insertion portion 1 with a depth substantially the same as the thickness of a nut on one end side, a connection portion 3 connectable to a transmitting member 2 to which tightening force of a driver is transmitted on the other end side, and an index 5 with which to determine a rotating state or a stopped state on an outer circumference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact wrench socket for tightening bolts and nuts.

[0002]

2. Description of the Related Art It is widely used to fix an object by tightening a bolt or a nut. When tightening bolts and nuts, use a wrench or wrench.However, when assembling the frame or steel structure of a steel-framed house, the number of tightening will be large. Is difficult, and a tool having a driving member such as a motor is generally used.

[0003] One of the above tools is an impact wrench. This impact wrench is configured by a driver having a driving member such as a motor, and a socket having an insertion portion corresponding to the shape of a bolt and a nut and configured to be detachable from the driver, and tightened in advance. A tightening operation is performed by mounting a socket corresponding to the size of the bolts and nuts to be tightened. In this process, the operator confirms that the rotation of the socket has stopped and stops the driver.

[0004] In addition, a socket mounted on the impact wrench is formed with an insertion portion for inserting a bolt head and a nut along an axis, and a torque is applied to the bolt and nut inserted into the insertion portion. However, the depth of the insertion part is not controlled, and has a sufficient depth so that the head or nut of the bolt can be inserted easily and securely. Generally, it is formed.

[0005]

In a socket to be mounted on an impact wrench, a portion to be fitted into a driver is generally machined, and other portions are generally ground or plated by die forging. . In other words, the outer peripheral surface of the socket is engraved indicating the specifications of the socket, but has a single color that does not change except for the engraved mark.

[0006] Further, when an operator performs a tightening operation of bolts and nuts, the operator watches the socket obliquely from behind and monitors the socket. In addition, since the socket is of a single color, it is difficult to immediately and clearly determine the rotation of the socket during the fastening operation and the stop of the socket due to the end of the fastening operation. Even after the work is completed, the next work, for example, the transition to the tightening work for the adjacent bolts and nuts, cannot be performed, and there is a problem that wasteful time is wasted. There is also a problem that the fastening operation is stopped even though the rotation of the socket is not stopped, and the next operation is started with insufficient tightening of the bolts and nuts.

[0007] Even if the wasted time spent on one bolt and nut is very small, it is wasted when a large number of bolts and nuts are tightened, such as when assembling a steel-framed house. Time is accumulated, which is a major problem.

In order to prevent the nuts tightened on the screws from being loosened, a so-called double nut system in which two nuts are fastened may be adopted. However, it is troublesome to tighten the two nuts individually. As a result, two pieces may be tightened at the same time. In this case, even if the first nut is tightened, there is no guarantee that the second nut is tightened to prevent loosening, and the function of preventing loosening may not be exhibited.

However, when the second nut is tightened using the socket, the depth of the insertion portion of the socket is sufficiently large with respect to the thickness of the nut.
When the first nut approaches the first nut, the first nut engages with the insertion portion, and the rotation of the socket is hindered.

It is an object of the present invention to be able to reliably and easily visually check whether the motor is rotating or stopped, or to securely tighten one nut when locking with a double nut. An object of the present invention is to provide an impact wrench socket.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an impact wrench socket according to the present invention is an impact wrench socket for tightening a bolt or a nut, and determines a rotating state or a stopped state on an outer peripheral surface. Index is provided.

[0012] In the impact wrench socket (hereinafter referred to as "socket"), it is possible to clearly determine whether it is rotating or stopped by the index provided on the outer periphery. Therefore, even when the operator operates the driver while observing the socket from diagonally rearward, the operator immediately and clearly determines that the socket has transitioned from the rotating state to the stopped state, and immediately stops the operation. You can move on to the next task.

Therefore, the bolt and nut tightening operation can be effectively performed without wasting time, and when a large number of tightening operations are performed, the operation can be smoothly performed. This can contribute to shortening the construction period.
In addition, since it is possible to visually confirm that the socket is stopped, it is possible to prevent the occurrence of insufficiently tightened bolts and nuts.

Another socket according to the present invention is an impact wrench socket for fastening a bolt or a nut, wherein the depth of an insertion portion provided along one axis at one end side is substantially equal to the thickness of the nut. These are dimensions.

In the above-described socket, only one nut can be fitted into the insertion portion, so that it is impossible to physically tighten two nuts at the same time. Even when the second nut is fastened to the screw without simultaneous tightening, the screw does not interfere with the already-tightened nut.
For this reason, the first nut and the second nut can be securely tightened by a preset torque, respectively, and a high locking function can be exhibited.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the above socket will be described below. The socket according to the present invention is configured to be detachable from a driver having a built-in drive motor,
Further, the head and the nut of the bolt can be inserted so as to be aligned with the axis, so that the bolt or the nut can be tightened by being driven by a driver and rotating.

The first socket according to the present invention is provided with indices for judging the rotating state and the stopped state on the outer peripheral surface, so that when the fastening operation is performed, the socket is currently rotating or stopped. To make it easy to determine
Thus, when the socket is stopped, the driver is stopped immediately to shift to the tightening operation for the next bolt and nut, or to shift to the next process, and the occurrence of insufficiently tightened bolts and nuts is generated. This makes it possible to prevent the problem.

The index provided on the outer peripheral surface of the socket is not particularly limited as long as it can be easily and reliably visually recognized from the outside and can reliably determine the rotation state or the stopped state. Is not limited.

The index is preferably a color line or a color point having a color formed on the outer peripheral surface of the socket in the axial direction (the direction along the rotation axis). For example, it is possible to divide the outer circumference of the socket into at least three substantially equal parts along the circumference to form an axial color line at each division position, and to form a color point at each division position. It is also possible.

It is difficult to recognize a color line or a color point as described above as a color line or a color point when the socket is rotated, and it is recognized as a color band due to an afterimage. When the socket is stopped, it is recognized as an individual color line or color point. Therefore, it is possible to easily and reliably determine whether the socket is in the rotating state or the stopped state.

In addition, at least three color lines and color points provided on the outer peripheral surface of the socket are necessary for an operator to visually recognize from outside. However, if the number of color lines and color points is too large or the size is too large, even if the rotation speed of the socket is reduced, it is not easy to distinguish between adjacent color lines and color points, It is difficult to smoothly determine the rotation state and the stop state of the motor. Therefore, it is preferable to experimentally determine the size and number of the color lines and color points at which rotation and stop can be easily and reliably determined.

As an index provided on the outer peripheral surface of the socket,
A spiral color line (spiral color line) may be used in addition to the linear color line and the dot color point. Preferably, the spiral colored wire leads are approximately equal to or slightly longer than the length of the socket. In this case, the spiral color line provided on the outer peripheral portion of the socket makes a round of the socket.
It is possible to surely recognize the rotation regardless of the rotational position of the socket, and it is possible to reliably and easily determine whether the socket is rotating or stopped.

The color line, the color point, or the spiral color line must have a color that can be clearly distinguished from the color of the outer peripheral surface of the socket. That is, when the outer peripheral surface of the socket is dark black, white or yellow is preferable, and when the outer peripheral surface of the socket has a color close to white, black or red is preferable. However, the present invention is not limited to these colors, but can be selected in accordance with the background color of the socket.

The marker provided on the outer peripheral surface of the socket is not limited to the color, and may include a projection. However, it is not preferable to use only the protrusion as the marker, and it is necessary to color the protrusion.
That is, the color line, the color point,
It is necessary to form a portion corresponding to the spiral color line in a projecting shape, and paint the projecting portion in a color such as white, yellow, black, or red, respectively.

In the second socket according to the present invention, the depth of the insertion portion of the nut formed so as to coincide with the axis of the rotating shaft is formed to have a dimension substantially equal to the thickness of the nut.
In order to prevent the loosening of the first nut fastened to the thread of the bolt or the thread of the stud bolt, the second nut is engaged with the first nut already fastened when fastening the second nut. It is configured such that only the second nut can be surely rotated and fastened without matching.

The shape of the insertion portion may be any depth as long as it is substantially equal to the thickness of the nut, and other shapes are not particularly limited. That is, the cross-sectional shape of the insertion portion can be a hexagonal shape corresponding to the shape of the nut, or a shape such as a chrysanthemum shape including 12 and 18 angles.

In each of the above sockets, the sizes of the bolts and nuts are not limited, and the present invention can be applied to sockets of all sizes which are mounted on a driver and driven.

Hereinafter, an embodiment of the above socket will be described with reference to the drawings. FIG. 1 is a three-view drawing illustrating the configuration of the socket. FIG. 2 is a diagram illustrating an example of an index provided on the outer peripheral surface of the socket. FIG. 3 is a diagram illustrating still another example of the index.

As shown in FIG. 1, the socket A has an insertion portion 1 formed at one end and a connection portion 3 of the transmission member 2 formed at the other end. A plurality of indices 5 are formed on the outer peripheral surface 4.

The insertion portion 1 is formed in a hexagonal shape corresponding to the shape of the head of the bolt and the nut, and the depth d is formed to have a size corresponding to the thickness of the nut.

In this embodiment, the insertion portion 1 is configured so that a hexagonal nut of M12 can be inserted, and the hexagonal portion is formed to have a width B of 19 mm and a depth of 10 mm.
This dimension has a value equal to the thickness of one or two nuts of M12. As described above, the insertion portion 1 has a shape and a size corresponding to the nut to be tightened, and when the diameter of the screw is different, the size is naturally changed.

In the insertion section 1 formed as described above, when one or two kinds of nuts are inserted, the end face of the inserted nut is flush with the end face of the socket A on the insertion section 1 side. Therefore, even when the second nut is screwed into the screw to which one nut has already been fastened and the second nut approaches the first nut, the insertion portion 1 of the socket A is Without engaging the first nut already fastened,
The second nut can be fastened smoothly and easily.

The transmission member 2 has a function of being attached to and detached from a driver (not shown), connecting the socket A to the driver, and transmitting torque generated from the driver to the socket A. For this reason, the transmitting member 2 only needs to have the function described above, and the shape and dimensions are not limited.

In this embodiment, a transmission member 2 having a rectangular cross section used for a normal impact wrench and having a positioning ball 2a urged outward at a predetermined position is used.

The connecting portion 3 is a portion connected to a driver (not shown) via the transmitting member 2 and to which a tightening force from the driver is transmitted. For this reason, it is formed having a shape corresponding to the shape of the transmission member 2. That is, the connection portion 3 is formed in the same shape as a general socket, and by having such a shape, it is possible to maintain versatility.

The index 5 is formed as a color line 5a consisting of a straight line along the axial direction. The color lines 5a are formed at positions where the outer peripheral surface 4 of the socket A is equally divided into three in the circumferential direction. The thickness of each color line 5a is about 2 mm. In this embodiment, three color lines 5a are formed. However, in practice, if the thickness is the same as that described above, it is sufficient to form at least six color lines 5a.

In the socket A configured as described above, when the head of a bolt or a nut (nut) is inserted into the insertion portion 1 and the driver is operated, the tightening force generated from the driver is transmitted via the transmission member 2 to the socket. A, the nut is inserted into the socket A by rotation and the nut is fastened to the screw. When the nut is tightened, the socket A stops.

When the socket A is rotating, the worker cannot recognize the color line 5a as a line, but recognizes it as a color band due to the occurrence of an afterimage due to the rotation, and based on this recognition, the user is rotating. Is determined. When the socket A stops, the worker recognizes the color line 5a as a line, and determines that the socket A has stopped based on this recognition.
Therefore, the worker can clearly and easily determine the rotation state and the stopped state of the socket A.

Next, an example of the index 5 will be described with reference to FIG. FIG. 3A shows a case where a plurality of linear color lines 5 a are provided on the outer peripheral surface 4 of the socket A along the axial direction of the socket A. In this example, by providing the color line 5a over the entire length of the outer peripheral surface 4 of the socket A, it is easy to determine the worker.

FIG. 6B shows a case in which a spiral color line 5b is provided on the outer peripheral surface of the socket A. In this example, the helical color line 5b is formed at any part over the entire length of the outer peripheral surface 4 of the socket A, so that the worker can be easily identified.

FIG. 5C shows a case where a plurality of color points 5c are provided on the outer peripheral surface 4 of the socket A. The number and size of the color points 5c are not particularly limited, but need to be such numbers and dimensions that a part of any of the color points 5c is always visible to the operator.

Further, as shown in FIG. 3 (a), the outer peripheral surface 4 of the socket A has a smaller diameter than the above-mentioned color point 5c at a position where it is easy for an operator to visually recognize when attached to the driver. It is preferable that the color points 5d are formed side by side on substantially the same circumference so that they look like a band during rotation as shown in FIG. In this case, the corner color points 5d maintain a band shape even when the socket A is rotated at a low speed, and are spaced such that the individual color points 5d can be visually recognized independently when the socket A stops. It is preferred to have. Such an interval between the color points 5d can be experimentally obtained.

[0043]

As described in detail above, in the first socket according to the present invention, the operator visually recognizes the index provided on the outer peripheral surface, and thus, regardless of whether the socket is rotating or the driver is driven. The state in which the socket has stopped can be easily and reliably determined. For this reason, when the socket stops, it is possible to immediately end the tightening work and proceed to the next work, and it is possible to eliminate wasteful time and achieve a reasonable work progress.

Further, in the second socket according to the present invention, when one nut is inserted into the insertion portion, there is no dimensional margin for engaging with another nut. Even when the second nut is tightened and approaches the first nut, it can be securely tightened without being affected by the first nut. For this reason, work stability can be improved and the loosening prevention function can be surely exhibited.

In particular, in the second socket, since only one nut can be inserted into the insertion portion, it is possible to screw two nuts into a screw and tighten them simultaneously. Absent. For this reason, the two nuts can be individually fastened to reliably exhibit the function of preventing loosening.

[Brief description of the drawings]

FIG. 1 is a three-view drawing illustrating the configuration of a socket.

FIG. 2 is a diagram illustrating an example of an index provided on an outer peripheral surface of a socket.

FIG. 3 is a diagram illustrating still another example of an index.

[Explanation of symbols]

 A Socket 1 Insertion part 2 Transmission member 2a Ball 3 Connection part 4 Outer peripheral surface 5 Index 5a Color line 5b Spiral color line 5c, 5d Color point

Claims (2)

[Claims] 1. An impact wrench socket for fastening a bolt or a nut, wherein an index for determining a rotating state or a stopped state is provided on an outer peripheral surface of the impact wrench socket. 2. An impact wrench socket for tightening a bolt or a nut, wherein a depth of an insertion portion provided along one axis on one end side is set to be substantially equal to a thickness of the nut. Impact wrench socket.