JPH0217813Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a box spanner in which a recessed portion having a polygonal cross section is provided and a screw type fastening means is inserted into the recessed portion and rotated.

[Prior Art] FIG. 1 is a diagram showing the configuration of a conventional example of this type of box spanner.

In Figure 1, 10 is a box spanner, 20
Numeral 30 is a screw-type fastening means, such as a hexagonal nut, and 30 is a fastening means mounting member.

The box spanner 10 consists of a fastening means gripping portion 11 and an arm 12. The fastening means gripping portion 11 is provided with a recess 13 having a hexagonal cross section. The arm 12 is formed in an L shape, and the fastening means gripping portion 11
is fixed. The fastening means attachment member 30 is provided with a male threaded portion 31 .

In such a box spanner, the arm 12 is inserted with the hexagonal nut 20 inserted into the recess 13.
By rotating the hexagonal nut 20, the hexagonal nut 20 is rotated together with the box spanner 10, and is attached to and detached from the male threaded portion 31.

[Problems to be solved by the invention] However, in such a box spanner, the hexagonal nut 20 is only inserted into the recess 13 and is not held, so the opening surface 14 of the recess 13 is directed downward. If this happens, the hexagonal nut 20 will fall out of the recess 13 due to its own weight. As a result, when the opening 14 is directed downward during on-site work, the hexagonal nut 20 must be held down to prevent it from falling out of the recess 13, resulting in poor workability.

As a box spanner with measures to prevent it from falling off, a hole is provided in the fastening means gripping part to communicate with the recess, and a holding member formed by bending an elastic wire is protruded from this hole, and the elastic force of this holding member is used to There was one in which the square nut was held within the recess.

However, in such a box spanner, the holding member is not a commercially available item, but is bent to the dimensions specific to the fastening means gripping part, so if the holding member is damaged or lost, a new one must be made. The problem arises that it must be done.

The present invention has been made in order to eliminate the above-mentioned problems, and an object of the present invention is to realize a box spanner that can hold a screw type fastening means using an easily available commercially available holding means.

[Means for Solving the Problems] In the present invention, a concave portion having a polygonal cross section is provided in the fastening means gripping portion, and the screw type fastening device is inserted into the concave portion and rotated, and the screw type fastening device is rotated. In the box spanner provided with a holding means for holding the fastening means in the recess, the fastening means gripping part is provided with a slit groove that partially communicates with the corner of the side surface of the recess, and as the holding means, This box spanner is characterized in that it uses an O-ring that is attached to the slit groove and protrudes from the conductive corner into the recess, and holds the screw type fastening means in the recess by frictional force.

[Example] The present invention will be explained below with reference to the drawings.

FIG. 2 is a diagram showing the structure of an embodiment of the box spanner according to the present invention. 3A is a sectional view in the axial direction of FIG. 2, and FIG. 3B is a view seen from the direction of arrow A in FIG. 3A. In FIGS. 2 and 3, the same parts as in FIG. 1 are designated by the same reference numerals, and redundant explanation will be omitted.

In these figures, 40 is a retaining means, for example an O-ring.

15 is a slotted groove, and the fastening means gripping portion 11
, and a portion thereof communicates with the corner 16 of the side surface of the recess 13 . The O-ring 40 is made of a material having a large coefficient of friction and elasticity, such as rubber, and is commercially available. The O-ring 40 is installed in the slot groove 15,
A portion protrudes from the corner 16 of the recess 13. 6
When the square nut 20 is inserted into the recess 13, the side 21 of the hexagonal nut 20 bites into the corner 16. O
The protrusion of the ring 40 from the corner 16 is such that even after the hexagonal nut 20 is inserted into the recess 13 and the opening surface 14 of the recess 13 is directed downward, the hexagonal nut 20 does not stick to the side edge 2.
1 and the O-ring 40 to prevent it from falling out of the recess 13.

In such a box spanner, when the hexagonal nut 20 is inserted into the recess 13, the side 21 of the hexagonal nut 20 bites into the O-ring 40 protruding from the corner 16, and the side 21 and the O-ring 40 The hexagonal nut 20 is held within the recess 13 by the frictional force generated between the two. By rotating the arm 12 in this state, the hexagonal nut 20 is attached to the box spanner 1.
0, and is attached to and detached from the male threaded portion 31. The hexagonal nut 20 is removed from the recess 13 by applying a force greater than its own weight.

In the embodiment, an O-ring is used as the holding means, but other holding means such as a piece of rubber may also be used.

Further, in the embodiment, the case where the screw type fastening means is a hexagonal nut has been described, but the screw type fastening means may be other than this, such as a hexagonal bolt.

In addition, in the embodiment, the cross section of the recess 13 and the nut is 6.
Although the cross section of the recess 13 and the nut has been described as having a rectangular shape, the cross section of the recess 13 and the nut may have a polygonal shape other than this.

Further, in the embodiment, a case has been described in which one corner 16 of the recess 13 communicates with the slotted groove 15, but the present invention is not limited to this. Two or more corners of the recess 13 may communicate with the slit groove 15 within a range that maintains sufficient strength. This allows the O-ring 40 to be attached to the hexagonal nut 2 at two or more locations.
0, even heavy hexagonal bolts can be
can be held within.

Further, in the embodiment, a case has been described in which the L-shaped arm 12 is fixed to the fastening means gripping part 11, but the present invention is not limited to this.
A T-shaped arm, a screwdriver handle, etc. may be fixed to the holder.

[Effect] According to the box spanner with this configuration, 6
Since the square nut 20 is held in the recess 13 by the frictional force between the sides 21 and the O-ring 40, the hexagonal nut 20 will not move out of the recess 13 under its own weight even if the opening surface 14 of the recess 13 is directed downward. It never falls out. As a result, in field work etc., 6
Since it is not necessary to press the square nut 20 so that it does not fall out of the recess 13, work efficiency can be improved. Since the hexagonal nut 20 is held by frictional force, even a hexagonal nut made of non-magnetic material can be held in the recess 13.

Further, since the O-ring used as the holding means is a general-purpose and inexpensive one, even if it is damaged or lost, a replacement can be easily obtained. This is particularly effective in field work.

As explained above, according to the present invention, it is possible to realize a box spanner that can hold a screw type fastening means using a commercially available holding means that is easily available.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the configuration of a conventional example of a box spanner, Fig. 2 is a diagram showing the configuration of an embodiment of the box spanner according to the present invention, and Fig. 3A is a cross section in the axial direction of Fig. 2. 3B are views seen from the direction of arrow A in FIG. 3A. 10...Box spanner, 13...Recess, 16
... corner portion, 20 ... screw type fastening means, 40 ... holding means.

Claims (1)

[Claim for Utility Model Registration] The fastening means gripping portion is provided with a recessed portion having a polygonal cross section, and the threaded fastening means is inserted into the recess and rotated, and the threaded fastening means is held within the recessed portion. In the box spanner provided with a holding means, the fastening means gripping part is provided with a slotted groove that is partially electrically connected to the corner of the side surface of the recessed part, and the holding means is attached to the slotted groove. A box spanner characterized by using an O-ring that protrudes into a recess from a conductive corner and holds a screw type fastening means in the recess by frictional force.