JPH0121291B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shovel and a shovel, and more particularly to a shovel and a shovel in which a blade and a tubular handle are connected via a press-fit piece such as a wooden stopper.

Conventionally, in this type of shovel and shovel, an insertion tube was integrally connected to the rear end of the metal blade, and a cylindrical wooden stopper was attached to the tip of the tubular grip lever, and one end of the rod was inserted into the insertion tube. There is a structure in which the handle rod is connected to the insertion tube of the blade by fitting the other end of the wooden stopper.

However, in the case of shovels and shovels 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 carried out; The bonding strength with the plug is weak, and there is a problem in 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 invented in view of the above-mentioned circumstances, and its purpose is to simplify the process by fitting a connecting piece of a blade to a handle rod and press-fitting a press-fitting piece such as a wooden stopper into the connecting piece. By performing a suitable joining operation, the blade and the gripping rod can be quickly and easily connected, and the strength of the connection between the blade and the gripping rod can be increased to ensure a strong connection. Another object of the present invention is to provide a shovel and a shovel that can simultaneously and reliably prevent the press-fitting piece from coming out.

Accordingly, the present invention comprises a blade and a tubular grip lever, and the blade is provided with a cylindrical connecting piece projecting rearward from the rear end of the blade, and the connecting piece is attached to the grip lever. A shovel and a shovel which are fitted into a distal end portion of the connecting piece to connect the blade to a gripping rod, wherein one side in the circumferential direction of the proximal end of the connecting piece is opened to form a semi-cylindrical shape, and the connecting piece a distal end of the piece having a substantially cylindrical shape, and extending outward in a tangential direction of the proximal end at an open end edge of the proximal end;
A press-fitting piece is press-fitted into the coupling piece while forming a protruding end edge that protrudes outward from the outer circumferential surface of the tip and deforms one side in the circumferential direction of the tip of the grip handle into a bent shape. It is characterized by:

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

What is shown in the figure is a shovel, in which reference numeral 1 denotes a hard metal blade that has been hardened, and integrally extends a cylindrical coupling piece 10 that projects rearward from its rear end. The piece 10 is fitted onto the tip 20 of a soft, unhardened, tubular metal gripping rod 2 to connect the blade 1 to the gripping rod 2, and the blade 1 is fitted onto the rear end of the gripping rod 2. is the grip part 2
1 is fixed.

Therefore, the connecting piece 10 in the blade 1
The distal end portion 11 is approximately cylindrical, and the proximal end portion 12 is semi-cylindrical with one circumferential side open, and the distal end portion 12 extends outward in the tangential direction of the proximal end portion 12 at the open end edge. Projecting end edges 12a, 12a are formed that project outward from the outer circumferential surface of the portion 11 and deform one circumferential side of the distal end portion 11 of the grip handle 2 into a bent shape, and are press-fitted into the coupling piece 10. Piece 3 was press-fitted.

The coupling piece 10 is integrally press-molded at the same time as the shovel main body 1 is manufactured, and its distal end 11 has a cylindrical shape that tapers toward the distal end, and its proximal end 12 The cross-sectional shape of
As shown in the figure, it has an approximately inverted U shape.

Reference numeral 13 denotes a stepped portion that serves as a contact point between the main body 1 and the grip lever 2 when the connecting piece 10 is fitted onto 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 connecting piece 10 is used, and a tapered part 31 is provided at the tip on the press-fitting side to connect the press-fitting piece 3. Piece 10
This is done to allow smooth press-fitting. The press-fitting piece 3 may have a cylindrical shape as shown in the drawings, or may have a tapered shape.

The present invention is constructed as described above, and when connecting the blade 1 and the gripping rod 2, first, the connecting piece 10 of the blade 1 is fitted to the tip 20 of the gripping rod 2, At this time, since the connecting piece 10 is harder than the grip lever 2, the connecting piece 1
The protruding end edges 12a, 12a protruding outward from the outer circumferential surface of the distal end 11 of the grip lever 2 interfere with the inner circumferential surface of the distal end 20 of the grip lever 2, as shown in FIG. The distal end portion 20 is pushed outward, and the distal end edge 20a portion of the distal end portion 20 is pressed and deformed so as to become substantially linear on the open side of the protruding end edges 12a, 12a, and the protruding end edges 12a, 12a are The tip edge 20a
It bites into the inner surface of the part.

Next, the press-fitting piece 3 is press-fitted into the connecting piece 10, and by this press-fitting, the connecting piece 1
0 can be expanded in diameter and the outer peripheral surface of the tip 11 can be pressed and bonded to the inner surface of the grip lever 2, and the protruding end edges 12a, 12a can be pushed outward. As a result, the substantially linear tip edge 20a of the handle lever 2 can be pressed and deformed outward by the outer circumferential surface of the press-fit piece 3 as shown in FIG.

As a result, the protruding edge portions 12a, 12a are further deepened into the tip portion 20 of the gripping rod 2,
The strength of the connection between the connection piece 10 and the handle rod 2 by biting can be further strengthened. Moreover, at the same time, when the press-fitting piece 3 is press-fitted, the tip edge 20a of the grip handle 2 bites into the outer peripheral surface of the press-fitting piece 3 as shown in FIG. By biting, the press-fitting piece 3
It is also possible to reliably prevent this from coming off from the coupling piece 10.

In the above-mentioned embodiment, when the coupling piece 10 is fitted to the grip lever 2, the protruding end edges 12a, 12a interfere with the inner circumferential surface of the tip 20 of the grip lever 2, and the tip Although the portion 20 is deformed in a slightly outwardly protruding shape, when the connecting piece 10 is fitted into the grip handle lever 2, the tip portion 20 of the grip handle lever 2 is not deformed, and the press-fitting is performed. The tip portion 20 may be configured to be deformed only by press-fitting the piece 3.

Alternatively, the press-fitting piece 3 may be inserted into the coupling piece 10 in advance, and the coupling piece 10 may be fitted to the grip lever 2 in this state. Furthermore, in addition to using the gripping rod 2 having the same outer diameter over its entire length, as shown in FIGS.
It is preferable to provide By doing so, it is possible to increase the strength while reducing the weight by using a small diameter pipe.

In this case, the bulging portion 22 has three to six grooves 22a extending along its outer periphery in the length direction.
It is preferable to provide . . . so that when the bulged portion 22 is grasped, the concave grooves 22a . . . increase the strength and prevent the hand from slipping. In addition, the cylindrical portion 11 of the connecting piece 10 in the blade 1 includes:
As shown in FIGS. 12 and 13, an extending portion 14 that is inclined toward the front side and extends upward is extended from the upper end thereof, and when the connecting piece 10 and the grip lever 2 are connected, the extending portion 14 The outer surface of the bulge 2 is as shown in FIG.
It is preferable to strengthen the bulging portion 22 by the extending portion 14 by positioning it along the inner surface of the raised portion where the stress is most concentrated.

As described above, the present invention consists of a blade and a tubular grip lever, and the blade is provided with a cylindrical connecting piece projecting rearward from the rear end of the blade,
A shovel and a shovel in which the connecting piece is fitted to the tip of the gripping rod and the blade is connected to the gripping rod, and one side in the circumferential direction of the proximal end of the connecting piece is opened to form a half. The coupling piece has a cylindrical shape, and the distal end of the coupling piece is substantially cylindrical, and the coupling piece has an open end edge at the proximal end that extends outward in a tangential direction of the proximal end, and extends outward from the outer circumferential surface of the distal end. A protruding end edge is formed that protrudes and deforms one side in the circumferential direction of the tip of the grip handle into a bent shape, and a press-fit piece is press-fitted into the coupling piece, so that the tip of the grip handle is bent. fitting the coupling piece to the part;
The blade and the handle rod can be quickly and easily connected by a simple connection operation by press-fitting the press-fit piece into the connection piece, and when the connection is made, the protruding edge of the connection piece is pressed against the grip handle. By biting into the tip of the rod, the tip is deformed, and this deformation can be used to connect the blade to the handle rod, and since this connection is made by biting the edge, the connection is reliably strong. it can be done,
Furthermore, by deforming the tip of the gripping handle, the tip edge of the gripping handle can be bitten into the outer circumferential surface of the press-fitting piece, thereby simultaneously and reliably preventing the press-fitting piece from slipping out. It is possible.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway side view, FIG. 2 is an explanatory diagram of parts before assembly,
Figure 3 is a side view of the blade, Figure 4 is Figure 3-
A line sectional view, FIG. 5 is a partially cutaway side view showing the state in which the coupling piece is fitted to the handle lever, and FIG.
7 is a bottom view showing a state in which the press-fit piece is press-fitted into the coupling piece, FIG. 8 is an enlarged sectional view taken from FIG. 7, and FIG. 9 is a plan view showing another embodiment.
Figure 10 is a cutaway side view of the same part, Figure 11 is the 10th
12 is a side view of the blade, and FIG. 13 is a bottom view thereof. DESCRIPTION OF SYMBOLS 1...Blade, 10...Connecting piece, 11...Tip part, 12...Proximal end part, 12a, 12a...Protruding edge part, 2...Grip handle, 20...Tip part, 20a
...Tip edge, 3...Press-fit piece.

Claims (1)

[Claims] 1 Consisting of a blade and a tubular grip lever, the blade is provided with a cylindrical connecting piece that protrudes rearward from the rear end of the blade, and the connecting piece is fitted into the tip of the grip rod. The blade is connected to a handle rod, the shovel and the scope are combined, and one circumferential side of the proximal end of the connecting piece is open to form a semi-cylindrical shape, and the distal end of the connecting piece is formed into a semi-cylindrical shape. The grip lever has a substantially cylindrical shape, and is provided at an open end edge of the proximal end portion, extending outward in a tangential direction of the proximal end portion and protruding outward from the outer circumferential surface of the distal end portion, when the grip handle lever is fitted. A shovel and a shovel, characterized in that a protruding end edge is formed to bend one circumferential side of the tip of the handle rod, and a press-fit piece is press-fitted into the coupling piece.