JPH0631641A - Development of compound functional hand work tool and method for preventing looseness of nut - Google Patents

Abstract

PURPOSE:To provide commonness for multisize use with a single tool by forming internal dimension between internal walls in a two-face width direction in two steps so that the tool can be applied for bolts and nuts of different dimension, in a shape of an end part of spanners, in the compound functional hand carrying work tool used in building an equipment or the like. CONSTITUTION:End parts of internal dimensions A, B are formed in a two-step structure in one side of the conventional open end wrench. End parts of internal dimensions C, D are respectively formed in a two-step structure in also the other side. That is, thickness T of the spanner end part is formed in a sum of thicknesses t1, t2 of the end parts of internal dimensions A and B, C and D, so that four kinds of nuts and bolts can be operated respectively by the ends of internal dimensions A to D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This application relates to facilities, hand tools for assembling or maintaining miscellaneous goods, and machine elements for claim 4, as claimed in claim 1, claim 2, and claim 3. We want to contribute to social needs by improving workability and productivity, improving design technology and safety.

[0002]

2. Description of the Related Art Conventional spanners, spectacles, torque, ratchet wrench are so-called single-function type which can be used only for rotating bolts and nuts of the same size at one mouth. Also, there is an adjustable wrench as an adjustable thing. With regard to claim 4, the conventional method of preventing the nut from loosening has been used, such as the double nut method using two nuts, the method of passing a split pin through the nut, and the method of using an adhesive.

[0003]

The conventional single-function spanners, such as an eyeglass wrench, a torque wrench, and a ratchet wrench, which have the following drawbacks, have been used by ordinary people at home and the like. When using it, visually measure the width across flats of the main parts of the bolts and nuts, and if one tool that seems to be compatible with this is prepared, it is often out of point. Since the tool of the present invention according to claims 1 and 2 has twice the applicability of the conventional tool, the misalignment is reduced by half, and the number of prepared tools is half. Therefore, the space for storage is halved, and management, carrying, etc. become easy, and there are advantages in terms of cost and steel resources. For construction adjusters of steel frame construction, electrical work, production equipment, etc., put about two tools of the present invention in pockets and carry them as needed at all times to improve productivity and improve safety even in high places work. Has the following drawbacks: An adjustable wrench rotates the bolts and nuts by sandwiching it with the upper jaw and lower jaw of the head, but there is play (play) which is a structural defect in the lower jaw, and large ones are easily removed from the bolts and nuts. Not only the force is not applied but also an injury may occur, which causes the ridgelines of bolts and nuts to be roundly deformed, and is disadvantageous to the tool of the present invention in terms of price and durability. It is a tool that considers the convenience of the user by combining it with a wrench or a driver as a set and combining them into a multi-function type. The tool of the present invention can be expected to be convenient at home and in the workplace in everyday life. According to claim 4, in the double nut method, if one nut is loosened due to a shock or the like, the remaining one is loosened at an accelerating rate, so there is concern about a long-time vibration place. The cotter pin structure is troublesome to mount. The workability is poor and the place of use is limited, and it cannot be used repeatedly. The adhesive method has doubts about heat resistance and chemical resistance, and repeated use is impossible.The present invention eliminates bolt and nut drop accidents as seen in Shinkansen Nozomi type vehicles. ,
I hope that you can make technical and social contributions to safety design.

[0004]

[Means for Solving the Problem] As is well known, a wrench, a wrench, and a ratchet wrench are used to rotate bolts and nuts. In order to make the thickness of the mouth portion (T) approximately half as shown in FIG. 2, the shape of bolts and nuts with different width across flats (t ₁ ) and lower side (t ₂ ) As a multi-function type with a finish that fits in, it is possible to fit two types of bolts and nuts with one mouth, and the knife type tool is a compact wrench and screwdriver. To prevent the nut from loosening, in Fig. 12, the split groove (s) of the main nut (a) is tightened with the outer width nut (b). The main nut (a) is internally threaded so that it can be screwed into the bolt. Is cut off,
In addition, there is a tapered male thread on the outside, a split groove (s) is provided in the hollow direction, and the other width nut (b) has an inner side that fits the tapered male thread of the main nut. It's screwed. Main nut (a) on bolt (v)
When fixing the main nut, screw in the main nut to a fixed position and fix it so that the main nut (a) does not escape when it reaches that position, and tighten the sub nut (b) firmly, and utilize the synergistic effect of the split groove and taper screw. It is a means to prevent the bolts and nuts from loosening due to elastic force and the law of wedges.

[0005]

FIG. 4 is a sectional view of the A-sized bolt head sandwiched by a spanner, an eyeglass wrench, a ratchet wrench, and a torque wrench according to the present invention, but the operation is equivalent to that of a conventional tool. FIG. 5 is a view of a B-sized nut sandwiched by a spanner, an eyeglass wrench, and a ratchet wrench of the present invention. Since the side having a large width across flats is used, the stepped surface in the middle of the mouth is a stopper. It plays a role and can be rotated efficiently when turning it in the tightening direction, and when turning the nut attached to the A dimension bolt, it is necessary to make it larger than the outer diameter (M dimension) of the bolt. It is the same idea as a hexagonal wrench. The function of the locking nut is to prevent loosening by tightening force, but the setting method is as shown in FIGS. 11, 12, and 13. For the strength, the number and length of the split grooves (s), the main nut ( The angle and thickness of the taper screw portion in a), the thickness, the material, etc. are adjusted. When the outer shapes of the main nut and the auxiliary nut are even-numbered polyhedrons, they can be tightened with a spanner.

[0006]

EXAMPLE An example will be described in claim 1. Prepare a conventional double-ended wrench with a nominal size of 14 x 17,
Weld only the mouth with a nominal size of 11 to the 14 side of this,
We have welded only the mouth of nominal size 13 to the side of 17 and conducted a test to tighten the nut, etc., but we obtained the results as planned, and we think that it is also possible to carry out claim 2 as well, claim 3 The effect was confirmed by using a spanner only. Regarding claim 4, for example, for a bolt having an external diameter of 50 M / M, the nut (L) is 30 M / M and (w) is 54.
We think that the purpose can be achieved by making it with 5M / M.

[0007]

EFFECTS OF THE INVENTION Nowadays, when labor saving is required, claims 1 and 2 are superior in ease of use and convenience to the conventional single-function type tool for the same purpose, and are mass-produced than the monkey wrench. Since it is suitable for use, inexpensive and durable spanners and wrenches can be provided. In claim 3, the spanner and the driver are integrated so that they can be prevented from being lost and are convenient to carry. Regarding the nut loosening prevention method, the present invention makes a social contribution so that a safe social life can be carried out without the accidents such as the bolts and nuts dropping as seen in Shinkansen Nozomi type vehicles.

[Brief description of drawings]

FIG. 1 is a plan view of a double-ended spanner according to claim 1.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view taken along line YY of FIG.

FIG. 4 is a cross-sectional view of a bolt sandwiched at a portion having a width across flat A in FIG.

5 is a cross-sectional view in which the nut is sandwiched at a portion having a width across flats B in FIG.

FIG. 6 is a plan view of a spanner having four iron plate openings in the application example according to claim 1;

FIG. 7 is a sectional view taken along line ZZ in FIG. 6, but this spanner is an example made by combining two iron plates.

8 is a plan view of a double-ended flat box wrench according to claim 2. FIG.

FIG. 9 is a plan view of the mouth of the ratchet wrench according to claim 2;

FIG. 10 is a side view of a handheld knife tool set according to claim 3;

FIG. 11 is an external view of a main nut (a) according to claim 4.

FIG. 12 is a cross-sectional view through the split groove surface (w-w) of the main nut after the bolt, the main nut, and the auxiliary nut according to claim 4 are assembled.

FIG. 13 is an explanatory view of an application example of a method for preventing loosening of a nut from a bolt according to claim 4 and a wrench of claim 1 in which a sub nut is tightened.

[Explanation of symbols]

A Inner dimension of width across flats a Main nut B Inner dimension of width across flats b Secondary nut C Inner dimension of width across flats s Split groove of main nut D Inner dimension of width across flats v Bolt T All spanners Thickness dimension t ₁ Thickness width of flat width D t ₂ Thickness width of flat width C φM Outer diameter of bolt

Claims (4)

[Claims] 1. A compound having a two-stage structure in which the inner dimension between the inner walls in the widthwise direction of the spanner is two-dimensional in the shape of the mouth of the wrench, and bolts and nuts of different dimensions can be sandwiched. Functional hand-held work tool. 2. In the shape of the mouth of a box wrench, ratchet wrench, torque wrench, etc., the inner dimension between the inner walls in the widthwise direction of the flat surface has a two-step structure, and bolts and nuts of different dimensions are provided. A multifunctional hand-held work tool that can hold 3. A hand-held knife-type tool set having a structure in which spanners or drivers of various sizes are supported by a key portion of a storage case and can be bent and stored in the case when not in use. 4. A locking nut method comprising two nuts. The main nut (a) is internally threaded so as to be screwed into the bolt (v), and is externally tapered, and the main nut (a) is:
A split groove (s) is also provided, and one auxiliary nut (b)
Has a taper female thread on the inside that fits the taper thread of (a). When fixing the main nut (a) to the bolt (v), screw (a) up to an arbitrary position. A method for preventing loosening of the nut with respect to the bolt, which is performed by reaching the position and strongly tightening the auxiliary nut (b) to the main nut (a).