JPS6156874A - Ratchet spanner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a ratchet spanner.

[Conventional technology]

In a conventional ratchet spanner, for example, as shown in FIG. 6, a ratchet wheel 3 is rotatably attached to a bifurcated head 2 connected to the tip of a handle 1. It has a structure in which a removable ratchet pawl 5 is attached, which is elastically biased by a spring 4 and always in pressure contact.

The ratchet spanner as described above is made by fitting the square hole 6 of the ratchet wheel 3 onto the head of a bolt or a Nand;
By grasping and rocking the ratchet wheel 3 from side to side,
The bolt 4 is tightened or loosened by the feeding action of the ratchet wheel 3 to one side by the ratchet pawl 5.

[Problem that the invention seeks to solve]

By the way, since the ratchet wheel of the above ratchet spanner is cylindrical, it can only be inserted externally from the axial direction onto the bolt or nano, and there is not enough space above the bolt or nano. and when can't use fl.

Further, when tightening or loosening a turnbuckle, a tool must be inserted into the turnbuckle from the radial direction, and a ratchet spanner cannot be used for tightening or loosening the turnbuckle.

This invention has been made in view of the above points, and can be engaged with bolts and nuts from the radial direction, and its use is not limited by space.
The purpose is to provide a ratchet spanner that can also tighten and loosen turnbuckles, etc.

[For production]

With the opening of the head and the opening of the ratchet wheel aligned, insert the ratchet wheel into the bolt, nut, turnbuckle, etc. from the radial direction, and then swing the handle from side to side. The ratchet wheel rotates intermittently in one direction by the feeding action of the ratchet pawl, allowing bolts, nuts, turnbuckles, etc. to be tightened or loosened.

〔Example〕

Embodiments of the present invention will be described below with reference to Figure 1 and 1.1 of the accompanying drawings.
This will be explained based on FIG.

In the first example shown in FIGS. 1 to 3, the handle 1
A head 2 provided at the tip of the head 1 is formed into a bifurcated shape by two opposing plates 13 and 13, and a ratchet wheel 14 is rotatably attached to the head 12.

The ratchet wheel 14 is rotatably supported on both sides by arcuate holes 15 provided in the plates 13.13, and pawls 16 provided at regular intervals on the outer circumferential surface are housed between the plates 13.13.

In both plates 13.13 of said head 12, openings 17 extending from the leading edges to the arcuate holes 15 are also provided with ratchet wheels 14.
are each provided with an opening 19 that reaches the engagement hole 18 from the outer periphery, and by aligning both openings 17 and 19 so as to communicate with each other, the engagement hole 18 can be positioned outward from the radial direction with respect to bolts, nands, turnbuckles, etc. It can be inserted or inserted.

A pair of ratchet pawls 20 and 21 are installed between the plates 13.13 of the head 12 by attachment to a shaft 22.23, and a spring 24 holds both ratchet pawls 20.2.
1 has rotational elasticity that is constantly pressed against the pawl 16 of the ratchet wheel 14 from both sides.

The shapes of the claws of both ratchet pawls 20, 21 are determined so that they both prevent rotation in the same direction with respect to the ratchet wheel 14, and even if the opening 19 of the ratchet wheel 14 faces one ratchet pawl, the other ratchet pawl will not rotate. The claws are designed to maintain engagement with the claws 16.

A cam 25 is provided between both check pawls 20 and 21 in the hemlock 12, and the lever 2 is located outside the head 12.
When the cam 25 is rotated at 6, both ratchet pawls 20.2
1 can be pushed open to free the ratchet wheel 14, as shown by the dashed line in FIG.

Both plays in the head 12) 13. On the inner surface of 13, an arc shape coaxial with the rotation center of the ratchet wheel 14? Vf,
27 is formed, and the ratchet shaft 14 is provided with a protrusion 28 that fits into both dish-shaped grooves 27. This is prevented by

Next, the second example shown in FIGS. 4 and 5 is one in which the feeding direction of the ratchet wheel can be selected from either the left or the right, which is different from the first example shown in FIGS. 1 to 3. The same parts as in the example will be described using the same reference numerals.

This second example is a pair of ratchet pawls 20.
Two sets of ratchet pawls 21 are used, the ratchet pawls of each set are installed in a reverse left-right arrangement as shown in Fig. 4, and a cam 25.2 is provided between each set of pawls.
5 is arranged so that when one set of ratchet pawls is engaged with the ratchet wheel 14, the other set of ratchet pawls opens, and by operating the lever 26, the feed of the ratchet wheel 14 can be selected to either the left or the right. It looks like this.

The ratchet spanner of the present invention has the above-mentioned structure, and the opening 17 of the head 12 has the opening 19 of the ratchet wheel 14.
1 or 4, insert the openings 17 and 19 into bolts, nuts, turnbuckles, etc. from the radial direction and fit the engaging holes 18, and then move the handle 11 from side to side. By swinging the ratchet wheel 14, the ratchet wheel 14 is intermittently fed and tightened or loosened.

Incidentally, in any of the examples, the shape of the engaging hole 18 provided in the ratchet wheel may be formed into a U-shape for a turnbuckle, in addition to a hexagonal or square shape.

〔effect〕

As described above, according to the present invention, since the opening is provided in the head and the ratchet wheel, the ratchet wheel can be engaged with the bolt or the nut from the radial direction, and when the space above the bolt or nut is narrow. However, you will be able to perform tightening and loosening work without any problems.

Further, since it can be engaged from the radial direction even with something long in the axial direction, such as a turnbuckle, it is possible to tighten and loosen the turnbuckle, and the range of uses can be expanded.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing a first example of a ratchet spanner according to the present invention, Fig. 2 is a longitudinal sectional side view of the same;
The figure is an exploded perspective view showing the main parts of the same as above, Fig. 4 is a longitudinal sectional front view showing the second example of the same, Fig. 5 is a longitudinal sectional side view of the same, and Fig. 6 is a front view showing a conventional ratchet spanner. be. 1] Handle, 12 Head, 13 Plate, 14 Ratchet wheel, 17.19 Opening, 18 Engagement hole, 20, 21 Ratchet claw, 24... Spring, 25... Cam, 26... Lever, 27... Arc-shaped groove, 28... Protrusion Patent applicant Toshiaki Miyazaki ``Same agent
sickle 1) sentence 2

Claims (2)

[Claims] (1) The ratchet wheel is rotatably attached to the head connected to the tip of the handle, the head has an opening that reaches the ratchet wheel support from the outer periphery, and an opening that opens at the outer periphery of the ratchet wheel, and the ratchet wheel is attached to the head. A ratchet spanner with a pair of ratchet pawls attached to both sides. (2) The ratchet spanner according to claim 1, wherein the head and the ratchet wheel are fitted with grooves and protrusions provided on their overlapping surfaces.