JPH0223648Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is applicable to manual tools such as shovels and scoops.
More specifically, it relates to a hand tool consisting of a blade and a tubular handle.

Conventionally, in this type of hand tool, an insertion tube is integrally connected to the rear end of a metal blade, and a cylindrical wooden plug is attached to the tip of a tubular grip lever, and one end of the wooden plug is attached to the tip of a tubular handle. There is a structure in which the handle lever is fitted into the insertion tube of the blade and the other end of the wooden stopper is fitted to connect the handle rod to the insertion tube of the blade.

However, in the case of a hand tool having such a structure, the blade and the handle rod are connected only by fitting the wooden stopper, so the connection work can be easily performed. The bonding strength with the wooden plug is weak, and there is a problem that the blade rattles against the wooden plug or comes off from the wooden plug after long-term use.

Therefore, in order to solve this problem, the insertion tube of the blade and the gripping rod are connected by the wooden stopper, and
The blade and the handle tube are fixed by passing pins through the joints between the insertion tube, the handle rod, and the wooden stopper in order to strengthen the connection strength. According to the above, in addition to the connection work by fitting the wooden stopper, a separate connection work by penetrating the pin is required, and this joining work is very complicated and time-consuming. This method has drawbacks such as requiring a special pin insertion hole to be provided in the wooden stopper and requiring a large number of parts, resulting in high cost.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to easily fit the connecting piece of the blade into the handle rod, and press-fit a press-fit piece such as a wooden stopper into the connecting piece. While the blade and the gripping rod can be quickly and easily connected through a simple joining operation, the blade and the gripping rod can be pressed and deformed into the opening formed at the proximal end of the connecting piece. The purpose is to further increase the strength of the connection with the handle rod and to ensure that the connection is strong.

Therefore, in the present invention, one circumferential side of the proximal end of the cylindrical coupling piece protruding from the blade is open, and a pair of open ends are provided at the proximal end facing each other at a predetermined distance. At the same time, the distal end of the gripping handle is fitted into the coupling piece, a press-fitting piece is press-fitted into the coupling piece, and the distal end of the grasping handle located between the open ends is moved outwardly. radially toward the center, the tip is deformed inwardly between the open ends, and the inner surface of the tip is engaged with the open edge of each of the open ends. That is.

Embodiments of the hand tool of the present invention will be described below based on the drawings.

The shovel shown in the figure is a hard metal blade 1 that has been hardened, and has a connecting piece 10 that projects rearward from its rear end. A bulging portion 20 is provided near the tip 22 of the tubular metal handle rod 2 by bulge processing, and the connecting piece 1 of the blade 1 is
0 is fitted onto the tip 22 of the gripping rod 2 to connect the blade 1 to the gripping rod 2, and
A grip body 21 is fixed to the rear end of the grip rod 2.

Therefore, the connecting piece 10 in the blade 1
The distal end portion 11 is approximately cylindrical, one side of the proximal end portion 12 in the circumferential direction is open, and a pair of open end portions facing each other with a predetermined interval are provided, and an open edge 13 of the open end portion, 13 is a protruding end that protrudes outward from the outer circumferential surface of the tip 11 and interferes with the inner circumferential surface of the tip 22 of the gripping handle 2 to deform the tip 22 outwardly. 2 to the connecting piece 10.
The press-fitting piece 3 is press-fitted into the coupling piece 10, and the tip of the handle lever 2 located between the open ends is pressed from the outside toward the center in the radial direction. The tip portion is configured to deform inwardly between the open ends, and the inner surface of the tip portion is configured to engage the open edges 13, 13 of each of the open ends.

The distal end 11 of the coupling piece 10 is provided with an extending portion 14 extending diagonally upward from the distal end, and the outer surface of the extending portion 14 is aligned with the inner surface of the raised portion 20a of the enlarged portion 20. That's what I do.

The enlarged portion 20 extends a certain distance toward the hand from a position near the tip of the gripping rod 2, that is, a position slightly closer to the blade 1 than the rear portion of the press-fit piece 3 where bending moment is applied during operation. 2
0 is formed to have a cylindrical cross section, and by forming this enlarged portion 20 on the grip lever 2, the grip lever 2
Even if a small-diameter one is selected, the strength of the rear portion of the press-fitting piece 3 to which a bending moment is applied during operation can be sufficiently increased, so that the weight can be reduced.

In addition, 20b... is a groove for preventing the hand from slipping, which extends along the length direction on the outer periphery of the enlarged portion 20.

Reference numeral 15 denotes a stepped portion, which serves as a contact point between the blade 1 and the grip lever 2 when the connecting piece 10 is fitted into the grip lever 2.

Further, as the press-fitting piece 3, a cylindrical wooden plug or a plastic member having a diameter slightly larger than the inner diameter of the coupling piece 10 is used, and a tapered part 31 is provided at the tip of the press-fitting side. Connecting piece 10
This allows for smooth press-fitting.

The press-fitting piece 3 may have a cylindrical shape as shown in the drawing, or may have a tapered shape.

The present invention is constructed as described above, and when the blade 1 and the gripping rod 2 are to be connected, the connecting piece 10 of the blade 1 is first fitted to the tip 22 of the gripping rod 2. In this case, since the connecting piece 10 is harder than the gripping rod 2, the open end 1 protrudes outward from the outer peripheral surface of the base end 12 of the connecting piece 10.
3 and 13 interfere with the inner circumferential surface of the tip 22 of the grip lever 2, pushing the tip 22 of the grip lever 2 outward as shown in FIG. While the open sides of the open edges 13, 13 are pressed and deformed so as to form a substantially straight line, the outer surface of the extending portion 14 extending from the connecting piece 10 is fitted along the inner surface of the enlarged portion 20.

Next, the press-fitting piece 3 is press-fitted into the connecting piece 10, and this press-fitting causes the open end edge 1 to
3 and 13 are pushed outward, and the substantially linear tip edge 22a of the handle lever 2 is pressed and deformed outward by the outer circumferential surface of the press-fit piece 3, as shown in FIG. As a result, the open end edges 13, 13 can be bitten into the tip portion 22 of the gripping handle 2 to strengthen the rotation prevention between the coupling piece 10 and the gripping handle 2, and at the same time, the press-fitting piece 3 can be press-fitted. When the tip edge 22a of the gripping handle 2 is aligned with the press-fit piece 3 as shown in FIG.
It will bite into the outer circumferential surface of.

Thereafter, the distal end portion 22 of the gripping rod 2 is pressed and deformed inwardly between the open ends of the proximal end portion 12 of the connecting piece 10, as shown in FIG. The inner surface of the tip portion 22 is engaged with the open edges 13, 13 of the open end portion, and the tip edge 22a of the tip portion 22 is bitten into the outer surface of the press-fit piece 3 so as to be warped toward the axis of the press-fit piece. In addition, it is possible to strengthen the prevention of the press-fitting piece 3 from coming out from the coupling piece 10, thereby making it possible to firmly connect the coupling piece 10 and the handle lever 2.

In the embodiment described above, the enlarged portion 20 is provided near the tip 22 of the gripping handle 2, and the enlarged portion 20 is provided near the tip 1 of the connecting piece 10.
1 is provided with an extending portion 14 along the inner surface of the enlarged portion 20, and a small-diameter grip lever 2 is used to reduce the weight.
0 and the extending portion 14 may not be provided separately, and the proximal end portion 12 of the coupling piece 10 has an open end edge 13, 13.
Also, the entire connecting piece 10 may be substantially cylindrical without protruding outward beyond the outer circumferential surface of the distal end 11 of the connecting piece 10.

Further, although the above embodiments are applied to a shovel, it goes without saying that the invention can also be applied to a shovel, an agricultural hawk, etc., although not shown.

As described above, the present invention provides a cylindrical connecting piece protruding from a blade, with one side in the circumferential direction of the proximal end being open, and a pair of open ends facing each other at a predetermined distance from the proximal end. At the same time, the tip of the grip lever is fitted into the coupling piece, a press-fit piece is press-fitted into the coupling piece, and the tip of the grip handle located between the open ends is removed from the outside. The distal end portion is deformed inwardly between the open end portions by pressing toward the center in the radial direction, and the inner surface of the distal end portion is engaged with the open edge of each of the open end portions. Therefore, the fitting of the connecting piece to the gripping rod in the blade, the press-fitting of the press-fitting piece into the connecting piece, and the pressing of the gripping rod between the open ends formed at the proximal end of the connecting piece. Due to the deformation, the blade and the handle rod can be reliably and firmly connected with a simple connecting operation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a bottom view, Fig. 2 is a partially cutaway side view, Fig. 3 is a side view of the blade, Fig. 4 is a bottom view thereof, and Fig. 5 is a side view of the blade. 3 is a sectional view taken along the line, FIG. 6 is a partially cutaway side view showing the state in which the handle rod is fitted to the blade, FIG. 7 is an enlarged sectional view taken along the line shown in FIG. 9 is an enlarged sectional view taken along the line of FIG. 1. FIG. DESCRIPTION OF SYMBOLS 1... Blade, 10... Connecting piece, 11... Tip part, 12... Base end part, 13, 13... Open end edge, 2... Grip handle, 22... Tip part, 3... Press fit piece.

Claims (1)

[Scope of utility model registration request] It consists of a blade and a tubular grip lever, and the blade is provided with a cylindrical connecting piece projecting rearward from its rear end, and the connecting piece is fitted into the tip of the gripping rod. A manual tool, such as a shovel or a scoop, in which a blade is connected to a gripping rod, wherein a pair of open ends facing each other at a predetermined interval are provided at the base end of the connecting piece, and the tip of the gripping rod is and press-fitting the press-fitting piece into the connecting piece, and pressing the tip of the grip lever located between the open ends from the outside toward the center in the radial direction. . A manual tool, characterized in that the tip portion is deformed inwardly between the open end portions, and the inner surface of the tip portion is engaged with the open edge of each of the open end portions.