JPH0621855U - Replaceable box spanner using ratchet spanner - Google Patents

Abstract

(57) [Abstract] [Purpose] A box spanner that allows bolts and nuts of various sizes to be fastened with a single ratchet wrench by using an adapter with a replaceable box socket [Configuration] Ratchet wrench 1 at one end In the ratchet wheel, a polygonal stopper 3a that meshes with the fitting hole 2a on the large diameter side is formed, and at the other end, a square hole 3b of the box socket is formed.
As shown in FIG. 1, the stopper portion 3a of the adapter 3 having the angular shaft 3a that can be fitted to the ratchet wheel is fitted into the ratchet wheel, and the angular shaft 3b is protruded and fixed on the opposite side to form a cylindrical shape. Inside the box socket 4 in which one end of the box body is formed with a square hole 4b that engages with the square shaft 3b of the adapter and the other end is formed with a polygonal hole 4a that matches the diameter of the head of the bolt or the nut. A replaceable box spanner that selects a box socket 4 suitable for the diameter of a bolt or a nut to be fastened, and strongly presses the square shaft 3b of the adapter 3 into the square hole 4b of the box socket for fitting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a box spanner using a commercially available ratchet spanner, and more particularly to a box spanner in which a box socket that can be fitted into a ratchet wheel of the ratchet spanner is replaceable.

[0002]

[Prior art]

 In a conventional ratchet spanner, as shown by reference numeral 1 in FIG. 1, a ratchet head portion 1b connected to the tip of a handle 1a is provided with a cylindrical ratchet wheel 2 rotatably, and the ratchet wheel is tapered. A polygonal engagement hole 2a is formed on the inner surface of the head portion of the bolt or the outer shape of the nut, and the ratchet wheel 2 is constantly pressed against the ratchet wheel 2 by a spring inside the head. A claw that can be switched by the knob 1c, a box spanner attached directly to the tip of the handle, or a ratchet wheel and ratchet claw at the tip of the handle 11a as shown in Fig. 3. A box spanner 11 etc. in which a ratchet head portion 11b composed of is formed, and a socket square shaft 12 for fitting a box socket concentrically with the ratchet wheel is provided in the head portion is known. To have.

[0003]

[Problems to be solved by the device]

 In the conventional ratchet spanner 1, one of the engaging holes 2a for engaging the polygonal bolts and nuts of the ratchet wheel 2 has a size of 19 and the other has a size of 21, which is two sizes. Since it can only be used with a nut, it is heavy and inconvenient, in addition to the one normally used, it is necessary to carry multiple spanners that are infrequently used but are required. The same is true for box spanners, and if the ratchet wheel has a socket shaft on only one side, the box must be replaced frequently to accommodate the two commonly used nuts. It had to be inconvenient. Therefore, in the present invention, one ratchet spanner having two types of frequently used polygons can be used as a box spanner that can handle nuts and bolts of sizes other than the two types that are frequently used. It is intended to provide a simple ratchet spanner.

[0004]

[Means for Solving the Problems]

 A single ratchet wrench 1 with polygonal nut engaging holes 2a, 2a of different sizes formed on both end surfaces of a cylindrical ratchet wheel 2 can be used to tighten various types of bolts and nuts. To this end, a large-diameter polygonal columnar stopper 3a that can be fitted and fixed in the large-diameter side engaging hole 2a of the ratchet wheel 2 is provided at one end, and the square hole of the box socket 4 is provided at the other end. The box spanner 5 of the present invention consisting of a box spanner replacement adapter 3 having a small-diameter square shaft 3b that can be fitted into the box 4b and a box socket 4 is used, and a single ratchet spanner can be used to handle bolts and screws of various sizes. Make it possible to conclude

[0005]

【Example】

 The invention of the present application will be described based on embodiments with reference to the drawings. As shown in FIG. 4, the adapter 3 used in the present invention has a polygonal columnar 3a having a large diameter that meshes with the inner surface of a polygonal nut engaging hole 2a provided at the inner surface of a ratchet wheel 2 having one end. And the other end is a small-sized rectangular shaft 3b that can be fitted into the rectangular hole 4b of the box socket 4, and the middle part thereof forms a diameter-reduced cylindrical body. Is provided with a spherical retainer 3c which is pressed outward from the inside by a spring. The inner surfaces of the engaging holes 2a and 2'a and the engaging hole 4a of the box socket are slightly inwardly tapered so that they can smoothly mesh with the engaging surfaces of the nut and the adapter.

[0006]

[Action]

 First, a replacement adapter in which a polygonal columnar stopper 3a that meshes with the large diameter fitting hole 2a of the ratchet spanner 1 is formed at one end, and a square shaft 3b for engaging a box socket is formed at the other end. 3 is prepared, a square box 4b that engages with the square shaft 3b of the adapter 3 is formed at one end of the cylindrical box body, and the other end has a polygonal shape that matches the diameter of the bolt head or nut. A large number of various box sockets 4 having the holes 4a are prepared and placed. Then, as shown in FIG. 2, the polygonal columnar stopper portion 3a of the adapter is fitted into the nut engaging hole 2a of the ratchet wheel 2, and the angular shaft portion 3b is projected and fixed on the opposite side. Next, select from a large number of box sockets 4 that match the diameter of the head or nut of the bolt to be fastened, and place the square shaft 3b of the adapter 3 in the square hole 4b of the box socket 4. Use it as a box spanner after pressing it firmly and fitting it together. With this arrangement, if the handle 1a is swung like a normal ratchet spanner, the ratchet mechanism can feed the bolts and nuts in one direction to tighten or loosen the bolts and nuts. It is very convenient. In this way, by using the box spanner 5 consisting of the replacement adapter 3 and the box socket 4 of the present invention, if there is only one ratchet spanner that is normally used frequently, the number of box sockets required is Since it is sufficient to have only one piece, there are few tools to carry, and it is light in weight, which makes it easy to work in high places. Further, since the adapter 3 and the box socket 4 are tightly fitted to each other by the retainer 3c, there is no fear that the box socket will fall out, so that it can be safely used in a high place.

[0007]

[Effect of device]

 As described above, according to the invention of the present application, as long as there is one ratchet spanner normally used and one adapter, all that is required is to prepare the required box socket, and the bolts and nuts other than the commonly used diameter can be used. Since it is possible to handle tightening and loosening work, it is not necessary to prepare many expensive ratchet spanners and box spanners, which is cheap. In addition, the box socket of the present invention is smaller than the conventional ratchet spanner and box spanner, and it is space-saving and lightweight, so it is easy to carry.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of fitting and fixing a ratchet spanner by applying the box spanner of the present invention.

FIG. 2 is a longitudinal sectional view showing the ratchet spanner fitted and fixed with the box spanner of the present invention.

FIG. 3 is a perspective view of a conventional box spanner.

FIG. 4 is a perspective view of a box spanner including the adapter of the present invention and a spanner socket.

FIG. 5 is a vertical sectional view of the box spanner of the present invention.

[Explanation of symbols]

 1 Ratchet spanner 1a Handle 1b Ratchet head 1c Switching knob 2 Ratchet wheel 2a Nut engaging hole 3 Box socket replacement adapter 3a Polygonal stop 3b Square shaft 4 Box socket 4a Nut engaging hole 4b Adapter fitting square hole 5 pieces Invented box spanner 11 Box spanner 11a Handle 11b Ratchet head 11c Switching knob 12 Socket square shaft

Claims (4)

[Scope of utility model registration request] 1. An adapter having, at one end, a polygonal pillar-shaped stopper that can be fitted into an engagement hole of a ratchet spanner, and the other end having an angular shaft shape that can be fitted into a rectangular hole of a box socket. And a box socket in which a rectangular hole is formed at one end of a cylindrical box body and a polygonal engagement hole matching the diameter of a bolt head or a nut is formed at the other end. Replaceable box spanner. 2. An adapter having a polygonal columnar stop portion that can be fitted in an engagement hole of a ratchet spanner at one end, and an angular shaft-shaped adapter that can be fitted in a square hole of a box socket at the other end. Characterized in that the stopper of the polygonal column is fitted and fixed by penetrating through the nut engaging hole of the ratchet wheel, and the square shaft is fitted into the square hole provided at one end of the cylindrical box socket. The replaceable box spanner according to claim 1. 3. The adapter has a polygonal columnar stopper so that one end meshes with a polygonal engagement hole formed on the inner surface of the ratchet wheel of the ratchet spanner, and the other end has the engagement hole. It has an angular axis shape that penetrates it and can be fitted into the rectangular hole of the box socket, and a spherical retainer that is pressed outward from the inside by a spring is provided on one surface of the angular axis. A replaceable box spanner according to claim 1 or 2. 4. The box socket has a polygonal box shape in which one end of a cylindrical box body is formed with an angular hole for fitting with an angular axis of an adapter, and the other end matches the diameter of a bolt head or a nut. The box spanner according to claim 1 or 2, wherein an engagement hole having a tapered surface is formed.