JPH06154430A - Knife - Google Patents

Abstract

PURPOSE: To provide the structure of a knife for facilitating the production thereof concerning the knife of a type for producing the entire knife by individually preparing the blade of the knife and the core member of a handle and bonding the both by welding. CONSTITUTION: Concerning the knife with which the end face of a ferrule 3 as the core member of handle of the knife is butted and welded on a flat face 2' of a swell 2 as the root of a blade 1, the swell 2 is welded only near the center of a terminal part 6' of the wide side face of the ferrule 3 and concerning a handle member 5, a recess 7 is formed on the surface facing a welding ball 4. Thus, the stable welding bonding between the swell and ferrule can be provided by an extremely simple method and further since the welding face is covered with the recess of the handle member after welding, any mechanical working of the welding face is not required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knife structure, and more particularly to a core member of a knife handle portion (hereinafter referred to as a ferrule) on a flat surface of a portion where a root of a knife blade is swollen (hereinafter referred to as swell). ) Is a butt welded flat end face of the ferrule, and the parallel wide face of the ferrule relates to a knife having a structure covered by a handle member.

[0002]

2. Description of the Prior Art According to a conventionally known knife, such as German Federal Republic of Germany OS 3713958, a ferrule made by stamping from a flat material is welded to a flat surface of a swell, and a welding ball is attached to the end surface of the ferrule. It is developed like a collar around. Then, the sleeve-shaped handle member is pressed onto the ferrule to complete the handle.

[0003]

SUMMARY OF THE INVENTION It is a principal object of the present invention to provide a knife structure that facilitates the manufacture of knives of the type described above.

[0004]

In order to achieve such an object, the knife according to the present invention welds the swell only near the center of the end of the wide side surface of the ferrule, and the handle member is recessed on the surface facing the welding ball. Is provided

[0005]

In the knife having the above construction, since the welding ball is covered in the shape of a tunnel by the recess formed in the end surface of the handle member, it is not necessary to machine the welding surface after welding. Welding the swell near the center of the wide side of the ferrule is sufficient to obtain a reliable joining strength. By partially welding the vicinity of the center of the wide side surface of the ferrule to the swell, the narrow side surface end of the ferrule is not obstructed by the welding ball. This is especially useful when showing the narrow side edges. The length of the welding sphere can be shorter than the length of the end of the wide side, i.e. less than about a half, nevertheless ensuring a reliable joint strength between the ferrule and the swell. It is desirable that the handle member be composed of two half-split body members that can be tacked to the ferrule. The appearance of this half-split body member is matched with the shape of the wide side surface of the ferrule, and the ferrule is sandwiched by the half-split body member so that the narrow side end of the ferrule is shown. The wide side edge of the ferrule is preferably of such length that the narrow side edge of the ferrule is in line with the flat surface edge of the swell. Also,
The end surface of the handle member facing the welding sphere has its edges aligned with the edges of the flat surface of the swell, thereby providing a continuous connection between the outer surface of the swell and the outer surface of the handle.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a knife having a structure according to the present invention will be described with reference to the attached FIGS. Figure 1
2 is a side view of a knife according to the present invention, in which the root of the blade 1 is swollen, that is, the swell 2 is about 4 to 5 times the thickness of the blade 1 as shown in FIG. . The flat end surface 3'of the ferrule 3 is butt-welded to the flat surface 2'of the swell 2 away from the blade 1. Line V-V in FIG.
As shown in FIG. 5, which is a cross-sectional view taken along the line, the cross section of the ferrule 3 is substantially quadrangular.

Before welding, ferrule 3 and swell 2
Are adjusted so that the blade 1 and the ferrule 3 are straight to each other. In particular, the narrow side surface (back portion) of the blade 1 and the narrow side surface of the ferrule 3 are aligned in a straight line so that the narrow side end portions 9 and 9 ′ of the ferrule 3 are aligned with the flat end surface of the swell 2.

As shown in FIG. 4, the welding consists of two welding balls 4 provided on the opposite sides at the center of the end 6'of the wide side surface of the ferrule 3, and the length of the ball 4 is the end 6. Less than half the length of '.

A high stability is maintained by the welding ball 4 from the opposite direction, even when the lateral force of the blade 1 acts on its weld joint. Similarly, when a force is applied from the direction of the blade 1,
For example, when used for cutting, a long and thin mating surface between the swell and ferrule ensures the required stability. By arranging it in the center of the welding ball 4, optimum leverage can be obtained in both directions. Further, by separately manufacturing the ferrule and the blade, the blade 1 and the swell 2 can use higher grade steel than the ferrule 3. For example, the ferrule 3 can be made by stamping from steel sheet, while the swell 2 and the blade 1 can be made using other suitable manufacturing methods.

The welding ball 4 can be heated electrically or by a burner in an inert gas atmosphere. As shown in FIG. 3, the handle member is preferably composed of two half-split body members 5 that can be tacked to the ferrule 3. The sectional shape of this half-split body member 5 is the ferrule 3
Match the shape of the wide side of. The lower end surface 5'of the handle member is aligned with the flat surface 2'of the swell 2 so that the outer surface of the swell makes a continuous surface with the outer surface of the handle member. The half body member 5 is made of plastic or wood.

The narrow side edge of the ferrule should also be straight with the outer surface of the swell. That is, the narrow side surface ends 9 and 9 ′ of the ferrule 3 are aligned with the flat surface end portion of the swell 2.

The lower end surface 5'of the handle member 5 facing the welding ball 4 is provided with a tunnel-shaped recess 7 for covering the welding ball portion on the side surface facing the ferrule. The length of the recess 7 is set longer than the length of the welding ball 4. In this way, even if there is some variation in the position and length of the welding ball, the portion of the welding ball can be reliably covered without additional processing. That is, the welding ball does not need to be machined after the joining of the ferrule 3 and the swell 2 is completed.

Even if the length of the welding ball is shorter than one half of the length of the end portion of the wide side surface, the strength is sufficient. However, it is also conceivable that the length of the welding ball is slightly shorter than the length of the end portion of the wide side surface. In such a case, its length is preferably selected so that the recess 7 of the handle member 5 does not extend to the outer surface of the handle member 5 unless it becomes invisible when the handle member 5 is attached. That is, the welding ball 4 does not reach the narrow side surface 9 of the ferrule.

[0014]

As described above, according to the knife structure of the present invention, stable welding connection between the swell which is the base of the blade and the ferrule which is the core member of the handle can be obtained by a very simple method, and welding is also possible. After that, the welding surface is covered with the depression of the handle member, so that the welding surface does not need to be machined.

[Brief description of drawings]

FIG. 1 is a wide side view showing a knife according to the present invention.

FIG. 2 is a schematic view of a knife according to the present invention as seen from a narrow side surface, showing a swell integrated with a blade and a ferrule before welding.

FIG. 3 is a schematic view of a knife according to the present invention as viewed from a side with a narrow width, showing a swell and a ferrule after welding, and showing a state before attaching a handle member.

FIG. 4 is a wide side view showing the knife of FIG.

5 is a cross-sectional view taken along the line VV of FIG.

6 is a sectional view taken along line VI-VI in FIG.

[Explanation of symbols]

 1 knife blade 2 swell 3 ferrule 4 welding ball 5 handle member 7 recess

Claims (4)

[Claims] 1. A handle member of a core member (ferrule) (3) of a handle portion (5) of a knife is provided on a flat surface (2 ') of a bulged portion (swell) (2) of a blade (1). In a knife in which flat end faces of wide side faces parallel to the covered flat face are butted and welded, the swell (2) is welded only near the center of the end (6 ') of the wide side face of the ferrule (3), and the handle member (5) is a knife characterized in that a recess (7) is provided on the surface (5 ') facing the welding ball (4). 2. The handle member includes the ferrule (3).
2. Knife according to claim 1, characterized in that it consists of two halved body members (5) which can be fastened to the rivets. 3. Knife according to any of the preceding claims, characterized in that the length of the welding ball is shorter than the length of the end (6 ') of the wide side surface. 4. A narrow side edge (9, 9 ') of the ferrule (3) is aligned with a flat surface edge of the swell (2). Knife.