JPH02292417A - Shank for manual tool - Google Patents

Abstract

PURPOSE:To prevent the detent and backlash of a shank lever by forming an engaging groove at a nose section on the insertion side of the shank lever and projecting and forming a retaining piece engaged with the engaging groove from the insertion inward section of a grip insertion section monolithic-molded by a synthetic resin. CONSTITUTION:The diameter of an insertion-side nose section 12 to the insertion section 21 of a grip 2 is reduced through a stepped section 11 and the nose section 12 is formed in a tapered shape at another end of a shank lever 1, and a V-shaped engaging groove 13 is formed to the nose surface of the nose section 12. The grip 2 is manufactured by monolithic-molding the insertion section 21 into which the nose section 12 of the shank lever 1 is inserted and fixed, fork sections 22, 22 forkedly extended from the insertion section 21, and a grip section 23 formed between the nose sections of these fork sections by a synthetic resin. A retaining piece 24 engaged with the engaging groove 13 of the shank lever 1 is projected and shaped integrally to the insertion-inward section inner surface of the shank lever 1 of the insertion section 21. The shank lever 1 is inserted and fastened to the grip 2 side so that the retaining piece 24 is intruded into the engaging groove 13 of the insertion-side nose section 12 of the shank lever 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to handles for hand tools, and more particularly, to handles for hand tools such as shovels and shovels.

(Prior art) In the past, all grips for hand tools such as shovels and scoops were made of wood, but due to the recent shortage of wood resources, thin steel sheets have been used exclusively as a substitute. This is bent to form a grip, and a wooden or steel pipe rod is inserted into the base of the grip to fix it, but this requires a considerable amount of time and effort to manufacture. There was also the problem that the price was high.

Therefore, as an easy-to-manufacture and inexpensive grip, as shown in Japanese Utility Model Publication No. 52-3928 No. 1, for example, an insert part into which a handle rod is inserted and fixed, and a fork extending in a fork shape from this insert part are proposed. It is known that a grip consisting of a fork portion and a grip portion provided between the tip portions of these fork portions is integrally formed of synthetic resin, and is fixed by inserting a handle rod into the insertion portion of the grip. ing.

(Problem to be Solved by the Invention) However, in the conventional handle described above, since the insertion portion formed in the grip is simply a recessed hole, the handle rod can be fixed by simply inserting it into the insertion portion. In this case, the connection between the handle rod and the grip is weak, and if an unbalanced load is applied in the left-right direction to the scooping body attached to the tip of the handle rod, there is a problem in that the handle rod rotates relative to the grip.

In particular, when using a wooden handle, the handle dries and becomes thinner, and this wood thinning creates a gap between the insertion part and the handle, allowing the handle to rotate relative to the grip. In addition to this, there was also the problem of looseness occurring between the insertion portion and the handle rod.

The object of the present invention is to reliably prevent the handle rod from rotating and wobbling relative to the grip by devising the shape of the insertion part of the grip made of synthetic resin and the shape of the tip of the insertion side of the handle rod. The objective is to provide handles for hand tools that are capable of handling.

(Means for Solving the Problems) Therefore, the present invention includes a handle rod (1), an insertion portion (21) into which the handle rod (1) is inserted and fixed, and a A hand tool handle consisting of a fork part (22) extending in a bifurcated shape and a grip (2) integrally formed of synthetic resin with a grip part (24) provided between the tips of these fork parts (22). There is an engagement groove in the insertion side tip (12) of the handle rod (1). (13) is provided, and an engagement piece (13) that engages with the engagement groove (13) of the handle rod (1) is provided on the inner surface of the insertion inner surface of the handle rod (1) in the insertion portion (21). 24
) are integrally formed.
(Function) With the above configuration, the insertion portion (
When fixing the handle rod (1) by inserting the insertion side tip into the insertion part (21), the engagement groove (13) of the tip (12) is inserted into the engagement piece (24) of the insertion part (21). is engaged, and the handle rod (1
) can be reliably prevented from rotating and shaking relative to the grip (2).

(Example) Next, to explain an example, Fig. 7 shows a scissors to which the hand tool handle of the present invention is applied, and in Figs. 7 and 5, (1) has a scooping body ( A) is attached to a wooden handle rod, and the other end of the handle rod (1) has a tip end (12) on the insertion side to an insertion portion (21) of a grip (2), which will be described later.
is formed into a tapered shape with a small diameter through a stepped portion (11), and a V-shaped engagement groove (13) is formed in the distal end surface of the distal end portion (12).

(2) includes an insertion part (21) into which the tip (12) of the handle rod (1) is inserted and fixed, and a fork part (22) extending from this insertion part (21) to the forked cane. ) and these fut
- The grip part (22) provided between the tips of the grip parts (22) (22)
4) Grip (2) integrally formed with synthetic resin
An engagement piece (24) that engages with the engagement groove (13) of the handle rod (1) is provided on the inner surface of the insertion inner surface of the handle rod (1) in the insertion portion (21). It is formed as an integral part. In the embodiment shown in the figure, the first engaging piece (24) is
As shown in the drawings and FIG. 4, the longitudinal center line (X
) and extending in a direction perpendicular to the length direction thereof, a pair of wedge-shaped downward engaging pieces (24) are formed to protrude from both sides of the insertion part (21) in opposite directions. .

Further, as shown in Fig. 5, the retaining groove (13) is formed so as to extend in the same direction as the grain of the wood in the handle rod (1), so that the bending load is applied in the grain direction when the excavator is used. Install it so that it works.

In FIGS. 2 and 6, (25) is the insertion part (21)
This is a nail hole for a fixing nail (3) formed near the opening side of the grip part (24) so as to be aligned with the longitudinal center line of the grip part (23), similar to the engaging piece (24).

Further, the handle rod (1) is not limited to a wooden handle rod, and a metal pipe or the like may also be used. The connection with the tip (12) does not necessarily have to be performed.

Further, instead of the connection using the nails (3), adhesive may be used, or if the handle rod (1) is a metal pipe, the connection may be performed using a connecting pin or a blind rivet. .

For example, when using a metal pipe, the grip (2
) is formed with a through hole such as a connecting pin in place of the nail hole (25), and an engagement groove ( 13), and an insertion hole for the connecting pin is formed at a position that corresponds to the through hole.

The present invention is constructed as described above, and the grip (
In the insertion part (21) of 2), a handle rod (
When the insertion side tip (12) of 1) is inserted and fixed, the engagement piece (24) is inserted into the engagement groove (13) formed in the insertion side tip (12) of the handle rod. (24) is inserted, and then insert the handle rod (1) into the grip (2) side.

In this case, the engaging pieces (24) (24) and the nail hole (25)
) is arranged on the longitudinal center line (X) of the grip part (23), so the engagement groove (13) of the handle rod (1) is aligned with the nail hole (25). The engagement groove (13) can be easily inserted into the engagement piece (24) by inserting the engagement groove (13) into the engagement piece (24).

By this insertion, the engaging piece (24) is inserted into the retaining groove (13).
While pressing the outer circumferential surface of the insertion tip (12) into contact with the inner surface of the insertion part (21) by pushing it apart with a wedge action, the retaining groove (13) is pressed.
), and as a result, the handle rod (1) is fixed firmly and non-rotatably to the grip (2).

After that, a nail is driven into the nail hole (25) of the insertion part (21) to connect the insertion part (21) and the handle rod (1).

Therefore, even if an uneven load is applied to the scoop body (A) attached to the tip of the handle rod, the handle rod (1) is the grip (2)
Since it is fixed so that it cannot rotate relative to the grip, it is possible to reliably prevent the handle rod from turning with respect to the grip.

In addition, when the wooden handle rod dries and becomes thinner, the engagement groove (13) acts to pinch the engagement piece (24) as the wood shrinks due to the wood thinning. Goppa (
24) and the retaining groove (13) are firmly secured, so that the handle rod does not easily rotate relative to the grip, or rattling does not occur between the insertion part and the handle rod. It is.

Furthermore, the engaging pieces (24) (24) are shown in FIGS. 1 and 6.
As shown in the figure, the grip part (24) on the inner surface of the inner part of the insertion part (21) in the longitudinal direction is continuous on the longitudinal center line (X) and in the direction orthogonal to the longitudinal direction. So,
The direction in which these engaging pieces (24) (24) are applied is the same as the direction of the bending load normally applied to the handle rod (1) when Shirobel is used, so that the bending load is directly applied to these engaging pieces (24). ) (24) does not act as a force that damages it.

Moreover, when the insertion part (12) and the insertion side tip part (12) are connected using the nail (3) or the connecting pin, the tip of the insertion side tip part (12) is engaged with the engagement piece (24), so there is no need to do it at two places, one on the tip side and the base side of the insertion side tip (12), as in the conventional case, and one on the base side of the insertion side tip (12). Only the points need to be nailed or pinned, which reduces the effort required to connect the nails (3) or connecting bottles, and also improves the grip by forming the nail holes (25) and connecting bottle insertion holes. It also prevents a decrease in strength.

(Effects of the Invention) As described in detail above, according to the hand tool handle of the present invention, the engagement groove (13) is formed in the insertion side tip portion (12) of the handle rod (1).
and engages with the engagement groove (13) of the handle rod (1) on the inner surface of the insertion inner side of the handle rod (1) in the insertion portion (21) of the grip integrally formed with synthetic resin. Since the engaging piece (24) is integrally formed, the insertion part (24)
When fixing by inserting the tip (12) of the handle rod (1) into the handle rod (1), the engagement piece (24) provided on the insertion portion (21) is attached to the insertion tip (12) of the handle rod (1). By engaging with the engagement groove (13), it is possible to reliably prevent the handle rod (1) from rotating and shaking relative to the grip (2).

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the hand tool handle according to the present invention with Ichiro omitted, Fig. 2 is a front view of the grip, Fig. 3 is a side view of the same, and Fig. 4
The figure is a longitudinal sectional view of the main parts of the same grip, Fig. 5 is an explanatory view of the insertion side tip of the handle rod, Fig. 8 is a longitudinal sectional side view of the main parts, and Fig. 7 is the handle for the hand tool of the present invention. It is an overall explanatory diagram of a Siebel using the. (1)... Handle rod (2)... Grip (12)... Insertion side tip (13)... Retaining groove (21) ...Insert part (22)...Fork part (24)...Grip part 187-1

Claims (1)

[Claims] 1) A handle rod (1), an insertion part (21) into which the handle rod (1) is inserted and fixed, a fork part (22) extending in a fork shape from this insertion part (21), and these A hand tool handle consisting of a grip part (24) provided between the tips of a fork part (22) and a grip (2) integrally formed of synthetic resin, the insertion side of the handle rod (1) An engagement groove (13) is provided in the tip portion (12), and an engagement groove (13) of the handle rod (1) is provided on the inner surface of the insertion depth of the handle rod (1) in the insertion portion (21). ) A handle for a manual tool, characterized in that an engaging piece (24) that engages with the handle is integrally formed.