JPH0720258U - spanner - Google Patents

Abstract

(57) [Summary] [Purpose] The bolts and nuts can be re-engaged while they are positioned inside the mouth. (Structure) Of the upper jaw or the lower jaw, a notch is provided on the inner end surface of the mouth side of one of the jaws, and when the handle is turned in the direction opposite to the direction in which the bolts and nuts are turned, When the corners of the bolts and nuts are located in the notches, the opposite corners of the bolts and nuts are disengaged from the jaws, and the handle is further rotated, the corners of the bolts and nuts are rotated. A wrench characterized in that a part is separated from the cutout part and the opposite corner parts of the bolt and nut are engaged with the jaw part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spanner, in particular, an improvement of a mouth portion.

[0002]

[Prior art]

 As shown in FIGS. 11 and 12, the wrench of the wrench has a head formed of an upper jaw portion 111, a lower jaw portion 112, and a mouth portion 113. A bolt / nut 114 is fitted into the mouth portion 113 so that the bolt It is configured to engage and tighten the nut 114. Therefore, for example, when tightening the hexagon head bolt / nut 114, it is necessary to turn the handle 115 of the wrench about 60 ° and then once remove the mouth 113 of the wrench from the bolt / nut 114 and re-engage it. Occurs.

However, it is troublesome to remove the mouth portion 113 of the spanner from the bolts and nuts 114 and re-engage them, which causes a reduction in work efficiency. Therefore, a wrench having a pawl and a ratchet wheel that can tighten the bolt and nut while the bolt and nut are still engaged with the mouth was proposed. However, there is a problem in that the wall thickness of the head of such a spanner becomes large, so that it cannot be inserted into a narrow gap and the manufacturing cost becomes high.

[0004]

[Problems to be solved by the device]

 The present invention has been made in view of the above points, and an object thereof is to provide a spanner capable of re-engaging bolts and nuts with the bolts and nuts positioned in the mouth. Especially.

[0005]

[Means for Solving the Problems]

 The wrench of the present invention is a wrench configured to rotate the bolt and nut by engaging the opposite corners of the bolt and nut with the upper jaw and the lower jaw, wherein the upper jaw and the lower jaw are If a notch is provided on the inner end surface of the mouth of one of the jaws and the handle is turned in the direction opposite to the direction in which the bolt and nut are turned, the corners of the bolt and nut will be cut. When the corners of the bolts and nuts located inside the notches are disengaged from the jaws and the handle is turned further, the corners of the bolts and nuts are removed from the notches. It is characterized in that the opposite corners of the bolt and nut are engaged with the jaw portion apart from each other.

[0006]

[Action]

 First, when the bolts and nuts are engaged with the jaw and turned, the opposite corners of the bolts and nuts located inside the mouth should be engaged with the upper jaw (bottom jaw) located on the mouth bottom side. Section and the lower jaw (upper jaw) located on the mouth side, engage the bolts and nuts respectively.

Then, for example, when tightening hexagonal headed bolts and nuts, the bolts and nuts are positioned inside the mouths, and the upper and lower jaws are engaged with the opposite corners of the bolts and nuts. And rotate the handle about 60 °.

Next, when the handle portion is reversed, the corner portions of the bolts and nuts located on the mouth tip side enter into the above-mentioned notches, whereby the opposite corner portions of the bolts and nuts and the upper jaw and the lower jaw are When the handle is disengaged and the handle is rotated further, the corners of the bolts and nuts move away from the notches and the reversal angle becomes about 60 °. The lower part and the lower jaw are engaged with each other.

In this way, the bolts and nuts can be re-engaged with the bolts and nuts positioned in the mouth to tighten the bolts and nuts.

On the other hand, when the wrench is turned over and the mouth is fitted into the bolt / nut and rotated in the direction of loosening the bolt / nut, the opposite corners of the bolt / nut engage the upper jaw and the lower jaw. You can loosen the bolts and nuts. Then, when the handle is rotated about 60 ° and then reversed, the corners of the bolts and nuts located on the tip side of the mouth enter into the notches, and the opposite corners of the bolts and nuts and the upper jaw. When the handle and the lower jaw are disengaged and the handle is further reversed, the corners of the bolt and nut move away from the notch, and when the reversal angle becomes about 60 °, the relative bolt and nut The corners of the upper jaw and the lower jaw are engaged with each other.

In this way, the bolt / nut can be loosened with the bolt / nut always positioned in the mouth.

[0012]

【Example】

 The wrench S is composed of a head 1 and a handle 2. An upper jaw 3, a lower jaw 4 and a mouth 5 are formed on the head 1, and a bolt is provided on the inner end surface of the upper jaw 3 on the tip side. -A notch 6 for releasing the engagement with the nut C is formed (Fig. 1).

The notch 6 has a center point at a point located at a distance X from the base end of the lower jaw 4 toward the mouth tip and a distance Y from the center line CL of the mouth 5 toward the upper jaw 3. It is formed by cutting out along an arc having a radius R of (FIG. 2). In FIG. 2, L represents a contact point O1 between the side surface of the bolt / nut C and the boundary point 6A of the cutout portion 6 and the inner end surface of the upper jaw portion 3, and a corner portion of the lower jaw portion 4 located on the mouth bottom 5a side. Indicates the length of the line segment connecting the. L is not longer than the width across flats B of the mouth portion 5 in relation to the dimensional tolerance described later, and therefore, even if the handle portion 2 is rotated around the boundary point 6A, the angle of the bolt / nut C is changed. The part does not get caught on the inner end surface of the lower jaw part 4.

The following table shows an example of the values of X, Y and R corresponding to the width across flats B of the mouth of the spanner.

[Blank below]

Table (Unit is mm)

The size of R is not particularly limited as long as it is larger than half the size of the diagonal line D of the bolt / nut C.

In the figure, 3 a is an engaging portion of the upper jaw portion 3 that engages with a corner portion of the bolt / nut C, and is located on the inner bottom surface of the upper jaw portion 3 on the mouth bottom 5 a side. Reference numeral 4a in the drawing denotes an engaging portion of the lower jaw portion 4 that engages with a corner portion of the bolt / nut C, and is located on the mouth end side of the inner end surface of the lower jaw portion 4.

Next, the turning operation of the bolt / nut C by the spanner configured as described above will be described. (1) First, when the bolts and nuts C are engaged with the jaws 3 and 4 and turned, the opposite corners C1 and C2 of the bolts and nuts C located in the mouth 5 are replaced by the upper jaw 3 The bolt / nut C is rotated by engaging with the engaging portion 3a and the engaging portion 4a of the lower jaw 4 respectively (FIG. 3).

Since there is a dimensional tolerance on the plus side of the spanner B of the wrench S and a minus side dimensional tolerance of the twin face width B1 of the bolt / nut C, the two-face width B, B1 of both of them. Even with the same dimensions, the wrench engages the bolt / nut C at two points.

Then, for example, when tightening a hexagonal headed bolt / nut C, the bolt / nut C is located in the mouth portion 5 and the upper jaws are placed on the opposite corner portions C1, C2 of the bolt / nut C. The engaging portion 3a of the portion 3 and the engaging portion 4a of the lower jaw portion 4 are engaged, and the handle portion 2 of the spanner is rotated about 60 ° in the direction of arrow a in FIG.

(2) Next, when the handle portion 2 is reversed, the corner portion C1 ′ of the bolt / nut C located on the tip side of the mouth enters into the notch portion 6 so that the opposite corner portion of the bolt / nut C. The engagement between C1 and C2 and the engaging portion 3a of the upper jaw 3 and the engaging portion 4a of the lower jaw 4 is released (FIGS. 4 and 5). When the handle 2 is further reversed in the direction of arrow D, the corner C1 'of the bolt / nut C separates from the notch 6 and when the reversal angle becomes about 60 °, the opposite corner of the bolt / nut C is reached. C1 'and C2' are engaged with the engaging portion 3a of the upper jaw portion 3 and the engaging portion 4a of the lower jaw portion 4 (Fig. 6).

(3) By repeating the above operation, the bolt / nut C can be tightened with the bolt / nut C positioned in the mouth 5.

Next, a case where the bolt / nut C is loosened will be described. (1) First, turn over the wrench S, fit the mouth portion 5 into the bolt / nut C, and rotate the bolt / nut C in the loosening direction (the direction indicated by the arrow E). C1 'and C2' can be engaged with the engaging portion 3a of the upper jaw portion 3 and the engaging portion 4a of the lower jaw portion 4 to loosen the bolt / nut C (Fig. 7).

(2) Next, when the handle 2 is rotated about 60 ° and then reversed in the direction indicated by the arrow, the corner C2 of the bolt / nut C located on the mouth end side of the mouth 5 is notched. When the bolts and nuts C are engaged with each other, the corners C1 'and C2' of the bolt / nut C facing each other are disengaged from the engaging portion 3a of the upper jaw portion 3 and the engaging portion 4a of the lower jaw portion 4 (Fig. 8, FIG. 9). When the handle 2 is further reversed, the corner C2 of the bolt / nut C separates from the notch 6, and when the reverse angle becomes about 60 °, the opposite corners C1 and C2 of the bolt / nut C and the upper jaw. The engagement portion 3a of the portion 3 and the engagement portion 4a of the lower jaw portion 4 are engaged with each other (FIG. 10). (3) By repeating the above operation, the bolt / nut C can be loosened with the bolt / nut C always positioned in the mouth 5.

In the above embodiment, the wrench S having the fixed jaw has been described, but the present invention can also be applied to a wrench capable of adjusting the width across flats (opening width) B. Further, the shape of the cutout portion 6 is not particularly limited as long as the action and effect of the present invention can be obtained.

Although the notch 6 is formed in the upper jaw 3 in this embodiment, the same effect can be obtained by forming the notch 6 on the mouth side of the lower jaw 4. Further, the shape of the mouth bottom portion 5a does not have to match the side surface of the bolt / nut C as in this embodiment, and the shape is not particularly limited as long as the effect of the present invention is exhibited.

[0027]

[Effect of device]

 According to the spanner of the present invention, when the handle is reversed, the opposite corners of the bolt and nut and the jaw are disengaged in the mouth, and the other opposite corner and jaw of the bolt and nut are disengaged. Since the and are engaged, the bolts and nuts can be rotated without removing the mouth portions from the bolts and nuts, and the efficiency of tightening and loosening the bolts and nuts can be improved.

[0028]

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a spanner of the present invention.

FIG. 2 is a front view showing the operation of releasing the engagement between the wrench and the bolt / nut of the present invention.

FIG. 3 is a front view showing a tightening operation of bolts and nuts by the spanner of the present invention.

FIG. 4 is a front view showing a tightening operation of bolts and nuts by the spanner of the present invention.

FIG. 5 is a front view showing a bolt / nut tightening operation by the wrench of the present invention.

FIG. 6 is a front view showing a bolt / nut tightening operation by the spanner of the present invention.

FIG. 7 is a front view showing a loosening operation of bolts and nuts by the spanner of the present invention.

FIG. 8 is a front view showing a loosening operation of bolts and nuts by the spanner of the present invention.

FIG. 9 is a front view showing a loosening operation of bolts and nuts by the spanner of the present invention.

FIG. 10 is a front view showing a loosening operation of bolts and nuts by the spanner of the present invention.

FIG. 11 is a front view showing a conventional example of a spanner.

FIG. 12 is a front view showing a conventional example of a spanner.

[Explanation of symbols]

 1 Head 3 Upper jaw 4 Lower jaw 5 Mouth 6 Notch

Claims (1)

[Scope of utility model registration request] 1. A spanner configured to rotate bolts and nuts by engaging opposite corners of the bolts and nuts with an upper jaw and a lower jaw, wherein the upper jaw or the lower jaw is , If a notch is provided on the inner end surface of the jaw side of one of the jaws and the handle is turned in the direction opposite to the direction in which the bolt / nut is turned, the corner of the bolt / nut will have the notch. When the corners of the bolts and nuts located inside the parts are disengaged from the jaws and the handle is further turned, the corners of the bolts and nuts are separated from the notches and the bolts are removed.・
A spanner characterized in that the opposite corners of the nut and the jaw are engaged with each other.