JP3182674U - wrench - Google Patents

Abstract

A wrench capable of performing tightening / relaxation operations of various types of fasteners of different sizes.
A wrench head has a first fitting for receiving a first bolt by an engagement surface provided so as to be slightly contactable with a side surface portion of a head of a third bolt. A hole 41 is provided, and the engaging surface 42 has an accommodation groove 423 for accommodating a corner of the head of the second bolt for defining a second fitting hole for accommodating the second bolt. Is formed.
[Selection] Figure 2

Description

  The present invention relates to a wrench for performing a work of fastening by fastening fasteners such as bolts and nuts, and fixing and loosening them.

  FIG. 5 shows a first example of a conventional wrench. This conventional wrench 10 has a head 13 for turning a fastener (not shown) having a predetermined size at the tip of a wrench main body 11 elongated as a gripping portion, and the head 13 has a predetermined size. The polygonal fitting hole 12 is provided.

  FIG. 6 shows a second example of a conventional wrench. In this conventional wrench 20, a ratchet member 22 having a hexagonal fitting hole 23 is provided on the head on the tip side of a wrench main body 21 that is elongated as a grip portion, and the wrench main body 21 is arranged in a predetermined direction. It is a ratchet wrench that can be turned but cannot rotate in the reverse direction.

  FIG. 7 shows an example of a socket used for a socket wrench. An insertion hole (not shown) for coupling with the head of the wrench body is provided at one end in the axial direction centering on the rotation axis for turning the fastener of the socket 30, and a fastener is provided at the other end in the axial direction of the socket 30. A fitting hole 31 for receiving and rotating is provided.

  In the above-described conventional wrench, each fitting hole 12, 23, 31 has a predetermined size, so that a fastener having a predetermined standard can be turned. Traditionally, fasteners have different sizes defined by the metric method and the yard-pound method, so multiple wrench of different standards must be prepared for fasteners of different sizes. However, there is a problem that the cost is increased and the storage is complicated.

  A wrench applicable to a plurality of sizes is known in the art as disclosed in Patent Document 1 and Patent Document 2, for example. 8 and 9 show an example of a known wrench. The wrench 50 is provided with an accommodation hole 52 that can accommodate various types of fasteners 60 of different sizes in the head of the wrench body 51. The inner peripheral surface of the accommodation hole 52 is a convex groove 53 that undulates in the direction toward the radially outer side from the hole axis center and extends in the six hole axis directions, and a concave groove 54 that extends in the six hole axis directions. Are formed in a concavo-convex shape so that they are alternately arranged, and a notch groove 54 is formed in the convex groove 53 so as to correspond to the corner 61 of the outer peripheral surface of the fastener 60 to be accommodated. .

US Pat. No. 8,056,448 Taiwan registered utility model No. 349458 specification

  In the wrench described above, the corner portion 61 of the fastener 60 is engaged with the notch groove 54 while being in sliding contact with the convex groove 53, whereby the tightening / relaxation operation of the fastener 60 can be performed. There is a problem that the slidable contact surfaces of the convex groove 53 and the fastener 60 in contact therewith wear out.

  This invention is made | formed in view of the said malfunction, and it aims at providing the wrench which can perform the operation | work of fastening of various kinds of fasteners from which size differs, and relaxation | loosening.

  In order to achieve the above object, a wrench according to the present invention includes a plurality of bolts having different sizes including at least a first bolt and a second bolt having heads formed in polygonal shapes having different sizes. A wrench applied to a fastener having a head provided with a first fitting hole formed in a polygonal shape so as to accommodate and rotate the head of the first bolt. The first fitting hole is provided in the head so as to extend along an axial direction along the rotation axis of the head, and a plurality of the first fitting holes are formed in the polygonal shape when viewed from the end face in the axial direction. The engaging surfaces are defined by being continuous, and the engaging surfaces are divided into two by a concave surface portion that is recessed in a radially outward direction centering on the rotation axis and the concave surface portion. And two engaging surface portions. The concave surface portion is formed with an accommodation groove extending long in parallel with the axial direction, and the accommodation groove has side edge portions connected to the corresponding engagement surface portion on both sides thereof, and the first groove Inside the fitting hole, the side surface portion of the head of the second bolt is formed in a polygonal shape so as to contact the side edge portion and accommodate the corner portion of the head of the second bolt by the housing groove. The second fitting hole is defined.

  According to the wrench of the present invention, the side portions of the bolts having different sizes can be accommodated in the first fitting hole or the second fitting hole without sliding against the corresponding engaging surface or the engaging surface portion. Therefore, the wear of the wrench can be greatly reduced and it can be used for a long time. In addition, since wear on the head of the bolt can be significantly reduced, the bolt can be stably tightened and loosened.

It is an end view of the head in the wrench concerning the present invention. It is a figure explaining the use condition of the wrench which concerns on this invention. It is a figure explaining the other use condition of the wrench which concerns on this invention. It is a figure which expands and shows a part of FIG. It is a figure which shows an example of the conventional wrench. It is a perspective view which shows the other example of the conventional wrench. It is a figure which shows an example of the socket used for a wrench. It is a figure which shows the use condition of the conventional wrench. It is a figure which shows the other use condition of the wrench of FIG.

  Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.

(Example)
FIG. 1 shows an example of a wrench according to the present invention. The wrench according to this embodiment performs an operation of tightening and fixing or loosening and removing by turning fasteners having different sizes. The fasteners applied in this example are bolts 100, 200, and 300 having different sizes as shown in FIGS. 2, 3, and 4, for example. This wrench has a head 40 for turning a bolt at the tip of a wrench main body (not shown) extended as its gripping portion, and this head 40 is extended along an axial direction along its rotation axis. A first fitting hole 41 is provided, and the first fitting hole 41 is formed in, for example, a six-sided shape when viewed from the end surface by connecting a plurality of, for example, six engaging surfaces 42.

  In this example, the engagement surface 42 includes a concave surface portion 422 that is recessed in a direction toward the radially outer side centering on the rotation axis of the head 40, and two engagements that are divided into two by the concave surface portion 422. It is comprised by the surface parts 421 and 421.

  The concave surface portion 422 is curved so that its end surface is drawn, for example, in an arc shape, and defines an engaging groove 423 extending along an axial direction that is a direction along the rotation axis of the head 40. It is formed to be elongated along the central axis that is substantially the middle in the axial direction of 42. As shown in FIG. 3, the receiving groove 423 is provided so as to define a second fitting hole 43 having a hexagonal shape together with the corresponding corners of the bolt 200. ing.

  In this example, as shown in FIG. 2, each receiving groove 423 has side edge portions 424 connected to the corresponding engaging surface portions 421 on both sides thereof.

  Next, the operation and effect of the wrench according to the present invention configured as described above will be described with reference to FIGS. In this example, as applied to the wrench according to the present invention, the first bolt 100, the second bolt 200, and the first bolt having heads formed in a predetermined multi-side shape, for example, a six-side shape, having different sizes. A description will be given using the three bolts 300. The first bolt 100 has a head portion configured in a six-sided shape when viewed from the end face by six side surface portions 101, and has corner portions 102 between the six side surface portions 101. The second bolt 200 has a head portion configured in a six-sided shape when viewed from the end surface by the six side surface portions 201, and has corner portions 202 between the six side surface portions 201. The third bolt 300 has a head portion configured in a six-sided shape when viewed from the end face by the six side surface portions 301, and has corner portions 302 between the six side surface portions 301. In this example, the maximum diagonal length H1 on the end face of the head of the first bolt 100 is substantially the same as the maximum diagonal length of the first fitting hole 41. It is longer than the maximum diagonal length H3. The second bolt 200 has a maximum diagonal length H2 different from the lengths H1 and H3.

  As shown in FIG. 2, the wrench according to the present invention configured as described above has the first bolt 100 when the first bolt 100 is accommodated and rotated in the first fitting hole 41. When the head portion of the first bolt 100 is accommodated in the first engagement hole 41 while each side surface portion 101 of the head portion of the head is in contact with the engagement surface 421, the first bolt 100 is tightened. The relaxation work can be performed.

  Further, when the third bolt 300 is accommodated in the first fitting hole 41 and rotated, the corner portion 302 of the head of the third bolt 300 is in contact with the corresponding engaging surface portion 421 and the first fitting is performed. By being accommodated in the joint hole 41, the third bolt 300 can be tightened and loosened.

  As shown in FIGS. 3 to 4, when the second bolt 200 is accommodated in the second fitting hole 43 defined by the concave surface portion 422 and rotated, The side portion 201 hits the corresponding side edge portion 424 and the corner portion 202 is accommodated in the corresponding accommodating groove 423, whereby the second bolt 200 can be tightened or loosened.

  As described above, in the wrench according to the present invention, the side surfaces 101, 102, 103 of the bolts 100, 200, 300 having different sizes do not slide with the corresponding engagement surface 42 or the engagement surface 421. Since it can be accommodated in the hole 41 or the second fitting hole 43, the wear of the wrench can be greatly reduced, the wrench can be used for a long time, and the bolt can be tightened or loosened stably. It can be carried out.

  As described above, one embodiment of the present invention has been described with reference to the drawings, but the present invention is not limited to the illustrated embodiment. Various modifications can be made to the illustrated embodiment within the same range as the present invention or within an equivalent range.

  For example, a wrench according to the present invention is applied as another example with a socket. For example, as shown in FIG. 1, the socket 401 accommodates the first bolt 100 by the engagement surface 42 provided so as to be slightly contactable with the side surface portion 301 of the head of the third bolt 300. One fitting hole 41 is provided, and a housing groove 423 for defining a second fitting hole 43 for housing the second bolt 200 is formed in the engagement surface 42. Thus, the wrench according to the present invention can be applied with the socket 401 attached.

  The wrench according to the present invention is useful as a tool for performing tightening / relaxation work of fasteners such as bolts and nuts.

40 Head 41 First fitting hole 42 Engaging surface 421 Engaging surface portion 422 Concave surface portion 423 Accommodating groove 424 Side edge portion 43 Second fitting hole 401 Socket 100, 200, 300 Bolt 101, 201, 301 Side surface portion 102 202, 302 Corner H1, H2, H3 Maximum diagonal length of bolt head

Claims (2)

A wrench that is applied to a plurality of fasteners of different sizes including a first bolt and a second bolt having heads formed in polygonal shapes of different sizes from each other,
A head provided with a first fitting hole formed in a polygonal shape so as to accommodate and turn the head corresponding to the head of the first bolt;
The first fitting hole is provided in the head so as to extend along an axial direction along the rotation axis of the head, and a plurality of engagement holes are formed in the polygonal shape in an end view in the axial direction. It is defined by a series of mating surfaces,
The engagement surface includes a concave surface portion that is recessed in a direction toward the radially outer side centered on the rotation axis, and two engagement surface portions divided into two by the concave surface portion,
The concave surface portion is formed with a receiving groove extending long in parallel with the axial direction, and the receiving groove has side edge portions connected to the corresponding engaging surface portions on both sides thereof,
In the first fitting hole, the side surface portion of the head of the second bolt is in contact with the side edge portion, and the corner portion of the head of the second bolt is received by the receiving groove. A wrench characterized in that a second fitting hole formed in a polygonal shape is defined.   The wrench according to claim 1, wherein the housing groove is curved so that an end surface thereof is arcuate.

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