JP3390782B2 - Bit shaft fitting structure to two-stage hexagon socket - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening tool bit such as an impact wrench, an impulse wrench, and a nut runner.

[0002]

2. Description of the Related Art Bits for tightening tools are different in size due to the difference in the size of the cross hole of the screw head to be tightened with ordinary driver bits and the difference in the size of the bolt head and nuts to be tightened with box bits. You have to replace it with a new one from time to time. However, when it is necessary to perform work in units of seconds, such as in an automobile assembly line, it is the current situation to prepare a plurality of tightening tools with a bit suitable for the size and size thereof. When using multiple tightening tools by one person, after tightening with one tightening tool, it is necessary to return the tightening tools to the original position and take another tightening tool. The range of action of was widened, and it was a pain for workers.

Further, in the case of performing work with one tightening tool without using a plurality of tightening tools, for example, the tip end portion of the rotary shaft 11 of the tightening tool 10 as shown in FIG. It is necessary to replace the bit for the tightening tool by manually operating the chuck 12 mounted on. That is, when the bit is attached to the tightening tool, the ball 15 of the chuck 12 is fitted into the fitting groove 14 formed at the end of the bit shaft 13 and the inner wall of the sleeve 17 positioned by the spring 16 is fitted. The formed protrusion 17a prevents the ball 15 from moving and prevents the bit from coming out. Further, in order to remove the bit from the tightening tool, the sleeve 17 is moved forward with a hand so that the ball 15
Is pushed up into the gap 17b formed on the inner wall of the sleeve 17, and then the bit may be pulled out. Then, while the ball 15 is pushed up into the gap 17b formed in the inner wall of the sleeve 17, another bit is fitted and the sleeve 1
Bits can be exchanged by returning 7 to the original state.

[0004]

However, the conventional work of replacing the bit for the tightening tool by manually operating the chuck is very troublesome, and it is necessary to perform the work in seconds as in an automobile assembly line. In some cases, it had the problem of being unsuitable.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and it is necessary to make the replacement work extremely easy and to carry out the work in seconds as in an automobile assembly line. The purpose is to provide a bit for a tightening tool which is optimized in the case.

[0006]

The structure for fitting the bit shaft into the two-stage hexagon socket with socket of the present invention is such that the two-stage hexagon socket with socket 5 mounted on the rotary shaft 4 of the tightening tool 3 has a bit shaft. 1 has a structure in which the socket 5 with two hexagonal holes is provided with an inner small diameter hexagonal hole 5a and an outer large diameter hexagonal hole 5b continuous with the inner hexagonal hole 5a. A structure in which the synthetic resin member 2 is attached, and the synthetic resin member 2 is forcibly fitted in the outer large diameter hexagonal hole 5b in a state where the bit shaft 1 is fitted in the inner small diameter hexagonal hole 5a.

The structure for fitting the bit shaft into the two-stage hexagon socket of the present invention relates to the invention according to claim 1, wherein two synthetic resin members 2 and 2 are attached to the bit shaft 1 with a space therebetween, and A synthetic resin pipe 6 is loosely fitted between the synthetic resin members 2 and 2 of the bit shaft 1 and is on the same side in a state where one side of the bit shaft 1 is fitted into the inner small diameter hexagonal hole 5a. 2 is forcibly fitted in the outer large diameter hexagonal hole 5b.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a bit for a tightening tool according to the present invention will be described below in detail with reference to the drawings.

The tightening tool bit of the present invention is shown in FIGS.
In the case of a short-axis driver bit or box bit as shown in Fig. 3, a flexible synthetic resin member 2 is attached to the bit shaft 1, and the tightening tool 3 shown in Fig. 3 is used. It is removably attached to the socket 5 with a two-stage hexagonal hole attached to the rotary shaft 4. As shown in FIG. 3, the two-stage hexagon socket with socket 5 is provided with an inner small diameter hexagonal hole 5a and an outer large diameter hexagonal hole 5b, and one end of the bit shaft 1 corresponds to the inner small diameter hexagonal hole 5a. The synthetic resin member 2 attached to the bit shaft 1 in the fitted state
Is forcibly fitted in the outer large diameter hexagonal hole 5b. It is preferable that the inner small diameter hexagonal hole 5a is deeper than the outer large diameter hexagonal hole 5b because the swing can be reduced as the bit shaft 1 is fitted deeper.

The synthetic resin member 2 can be formed into a highly flexible tube-like member, and has a large outer diameter hexagonal hole 5b.
It can be deformed into the hexagonal hole shape when it is forcibly fitted in, or can be made slightly larger than the hexagonal hole shape from the beginning. Further, it is preferable that the synthetic resin member 2 has excellent heat resistance, oil resistance, weather resistance, wear resistance and the like. In addition, this synthetic resin member 2
When the tube is made into a tube shape, it is forcibly fitted, it is used with an adhesive, it is baked, etc.
Since the tightening tool bit itself is not expensive, it can be manufactured at low cost.

Further, the tightening tool bit of the present invention is
In the case of a long-axis driver bit or box bit as shown in FIGS. 4 and 5, a synthetic resin pipe 6 is loosely fitted to the bit shaft 1 and the bit shaft 1 has the flexibility on both sides thereof. The synthetic resin members 2 and 2 may be attached.

[0012] The synthetic resin pipe 6 is for supporting with a hand and guiding the tip of the bit to the screw head or bolt head when tightening screws or bolts, and has flexibility. Heat resistance,
It is preferable to have excellent oil resistance, weather resistance, wear resistance and the like.

As shown in FIGS. 6 and 7, the tightening tool bit of the present invention constructed as described above has the inside of the two-stage hexagon socket with socket 5 mounted on the rotary shaft 4 of the tightening tool 3. When the bit shaft 1 is pushed into the small-diameter hexagonal hole 5a with one hand and one end of the bit shaft 1 is fitted into the inner small-diameter hexagonal hole 5a, the synthetic resin member 2 attached to the bit shaft 1 becomes a hexagonal hole of the outer large-diameter hexagonal hole 5b. Since it is deformed into a shape and is forcedly fitted into the outer large-diameter hexagon socket 5b, it is firmly held in the two-stage hexagon socket socket 5. Therefore, the tightening tool bit of the present invention is
It will not fall off when performing the downward tightening work, and will not pop out from the two-sided hexagon socket socket 5 side when it malfunctions.

The tightening tool bit of the present invention attached to the two-stage hexagon socket socket 5 can be easily removed from the two-stage hexagon socket socket 5 by simply pulling it out with a hand.

[0015]

Since the tightening tool bit of the present invention is constructed as described above, the replacement work becomes very easy, and it is necessary to carry out the work in seconds like an automobile assembly line. In some cases, it is optimal, and even when it is tightened in the downward direction, it does not fall off or pops out when it malfunctions, and it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a fastening tool bit according to the present invention.

FIG. 2 is a partial sectional side view showing a second embodiment of the fastening tool bit of the present invention.

FIG. 3 is an explanatory view of a tightening tool for attaching the socket for a tightening tool of the present invention in which a two-stage hexagon socket with socket is mounted on a rotary shaft.

FIG. 4 is a side view showing a third embodiment of the fastening tool bit of the present invention.

FIG. 5 is a partial cross-sectional side view showing a fourth embodiment of the tightening tool bit according to the present invention.

FIG. 6 shows the bit for the tightening tool of the present invention shown in FIG.
FIG. 6 is an explanatory view showing a state in which the tightening tool shown in FIG.

FIG. 7 shows the fastening tool bit of the present invention shown in FIG.
FIG. 6 is an explanatory view showing a state in which the tightening tool shown in FIG.

FIG. 8 is an explanatory view showing a state in which a conventional tightening tool bit is attached to a tightening tool.

[Explanation of symbols]

1-bit axis 2 Synthetic resin material 3 tightening tools 4 rotation axes 5 Two-stage hexagon socket socket 5a Small inside hexagon socket 5b Outside large diameter hexagon socket 6 synthetic resin pipes

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiro Uto 3-5-55 Nishi-Iwata, Higashi-Osaka City, Osaka Prefecture Yokota Industry Co., Ltd. (56) References ) Fields surveyed (Int.Cl. ⁷ , DB name) B25B 21/00-21/02

Claims (2)

(57) [Claims] 1. A structure in which a bit shaft (1) is fitted into a socket (5) with a two-stage hexagonal hole attached to a rotary shaft (4) of a tightening tool (3), wherein the two-stage hexagonal hole is provided. The attached socket (5) is provided with an inner small-diameter hexagonal hole (5a) and an outer large-diameter hexagonal hole (5b) continuous to the socket, while the bit shaft (1) has a flexible synthetic resin member (2). ) Is attached, and the synthetic resin member (2) is forcibly fitted in the outer large diameter hexagonal hole (5b) in a state where the bit shaft (1) is fitted in the inner small diameter hexagonal hole (5a). Bit shaft fits into a two-stage hexagon socket. 2. The two synthetic resin members (2) and (2) are attached to the bit shaft (1) with a space therebetween, and the two synthetic resin members (2) and (2) of the bit shaft (1) are combined with each other. The synthetic resin member (2) on the same side when the resin pipe (6) is loosely fitted and one side of the bit shaft (1) is fitted into the inner small diameter hexagonal hole (5a) is the outer large diameter hexagonal hole. The fitting structure of a bit shaft into a two-stage hexagon socket with socket according to claim 1, characterized in that it is forcibly fitted into (5b).