JPS62152684A - Grip of cutting tool, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a handle for a cutlery such as a folding knife.

(Prior art) In general, a blade such as a folding knife has a blade arranged between a pair of middle plates as a handle formed of metal such as iron, and the blade is held between the middle plates, and the blade is caulked. The blade is configured to be rotatable using a pin or the like.

In addition, in order to improve the appearance of the folding knife with this structure and the feeling of grip in the hand during use, the outer surface of the middle plate is made of synthetic resin, wood, rubber, or rubber-like elastic material (hereinafter referred to as rubber-like elastic material). A decorative plate made of a material such as elastomer is attached to the body.

In recent years, the decorative plates are hand-held and soft.
A material that is also non-slip is preferred (it is in the middle, and the above-mentioned elastomers are beginning to be used).

As a method for temporarily attaching and fixing the elastomer decorative plate to the intermediate plate, there is a method in which the metal intermediate plate and the decorative plate are attached and fixed by screwing or caulking.

In the handle formed using this method, the decorative plate made of elastomer is securely attached and fixed to the middle plate, but the surface of the decorative plate is attached with the screws or caulking pins. will be exposed.

Therefore, in order to eliminate the exposed portion, a handle in which both are attached and fixed using double-sided adhesive tape or adhesive has been considered.

(Problems to be Solved by the Invention) However, there is a limit to the adhesive strength of the double-sided pressure-sensitive adhesive tape or adhesive, and there is also a problem in durability. Therefore,
If a strong peeling force is applied between the middle plate and the decorative plate after many years of use, both may peel off.

In particular, when a non-polar polymeric material such as polyethylene or polypropylene is used as the elastomer, there is no suitable adhesive, and the adhesion between the metal and the elastomer becomes low, causing this peeling. It was easy to happen.

Furthermore, it is conceivable to use a special adhesive for bonding, but the adhesive itself would be very expensive, making it unsuitable for practical use.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a protrusion member having a non-circular locking portion on the inner surface of the decorative plate, and A means is adopted in which an engagement hole is provided on the outer surface of the intermediate plate facing the protruding member, into which the engagement portion is inserted and engaged by twisting.

(Function) This handle can be attached to the decorative plate by inserting the locking part of the protruding member provided with the locking part formed on the inner surface of the decorative plate into the insertion hole provided in the center and twisting it. Since the plate is attached and fixed, it can be easily and reliably attached and fixed without using adhesives, screws, caulking pins, etc.

(Example) Hereinafter, an example in which the handle of the present invention is embodied in a folding knife will be described with reference to FIGS. 1 to 7.

As shown in FIG. 4, this folding knife 1 is composed of a pair of middle plates 3 to which a decorative plate 2 is attached and fixed on the outer surface, and a blade 4 rotatably attached between the middle plates 3. The handle is composed of the middle plate 3 and the decorative plate 2.

As shown in FIG. 1, the decorative plate 2 is formed by injection molding an elastomer material, and has a decorative pattern (not shown) integrally formed on its outer surface that also serves as a non-slip member. A flange portion 6 that surrounds the outer periphery of the intermediate plate 3 is integrally provided on the inner surface 2a of the decorative plate 2 in a protruding manner. The decorative plate 2 has through-holes 7.8 at its distal end and proximal end, respectively.
is transparent, and cylindrical relief recesses 7a and 8a are formed at the edges of both openings, respectively.

An inverted truncated cone-shaped recess 12 is formed approximately in the center of the inner surface 2a of the decorative plate 2, and a 4.6
As shown in the figure, a protruding member 1 consisting of a cylindrical connecting portion 13 and a substantially elliptical locking portion 14 attached to its upper surface.
5 is formed.

Further, the side wall portion of the locking portion 14 is formed in a tapered shape whose diameter decreases toward the connecting portion 13. The protruding member 15 is integrally formed with the decorative plate 2, and the locking portion 14 is arranged such that the long axis of the elliptical shape is in the lateral direction of the decorative plate 2.

As shown in FIG. 2, a truncated conical protrusion 2 is located approximately at the center of the outer surface 3b of the intermediate plate 3 to which the decorative plate 2 is attached and fixed.
1 is formed by extrusion at the same time as press forming for forming the intermediate plate 3, and a recess 23 is formed in the inner surface 3a.

An engagement hole 22 is formed in the center of the projection 21 and has a size substantially equal to the elliptical shape of the locking portion 14 and whose major axis is in the longitudinal direction of the middle plate 3.

Therefore, the decorative plate 2 and the middle plate 3 are attached and fixed in the following manner to form a handle.

That is, the locking part 14 of the decorative plate 2 and the insertion hole 22 of the middle plate 3 are aligned with each other in the long axis direction, and the locking part 14 is inserted into the insertion hole 22 to lock either one of them. By twisting 90 degrees, as shown in FIG. 5, the long axis portion of the locking portion 14 is locked and fixed to the short axis portion of the engagement hole 22, and both are fixedly attached.

Threaded holes 25 and 26 for screwing the decorative plate 2 to the intermediate plate 3 with cap screws 24 are screwed into portions of the intermediate plate 3 facing the through holes 7 and 8 of the decorative plate 2. .

The threaded holes 25 and 26 increase the area of the threaded portion by making the side wall, which will become the threaded portion, protrude toward the decorative plate 2 side when the middle plate 3 is formed by press molding.

As shown in FIG. 4, a through hole 27 is provided at the tip of the middle plate 3, into which a caulking pin for rotatably holding the blade 4 is inserted.

A through hole 29 corresponding to the through hole 27 is formed in the core 28 of the blade 4, and an engaging stepped portion 30 and an engaging holding portion 31 are formed on the upper and lower sides as shown in FIG. ing. Then, by overlapping the through hole 27 of the middle plate 3 and the through hole 29 of the core 28 and inserting and caulking the caulking pin 32, the blade 4 is rotatably held between the rain plate 1. are doing.

As shown in FIG. 3, a locking member 35 is rotatably supported at the center by a caulking pin 34 on one side edge between the rainboards 3, and at its tip there is an engagement stepped portion 30 of the blade 4.
Alternatively, a retaining part 36 that engages and disengages the engagement holding part 31 is formed, and a pressing operation part 37 for release is provided in M Da.

A metal spring 42 is fixed to the base end between the rain plates 3 by a pair of caulking pins 41, and the locking member 35 is fixed to the base end between the rain plates 3.
The engaging part 36 is normally engaged with the engaging stepped part 30 or the engaging holding part 31 of the blade 4 by rotating counterclockwise in the figure, and the blade 4 is used with the blade 4 protruding from between the side plates 1. It is designed to be kept in the folded state or in the unused state folded between the two side plates 1.

Next, a method of using the folding knife configured in this way will be explained.

As shown in FIG. 3, when the engaging portion 36 of the locking parr 35 and the blade 4 are held in use, the small blade 4a of the blade 4 is held by grasping the handle portion consisting of the middle plate 3 and the decorative plate 2. This allows you to safely cut objects. Further, in this state, when the locking member 35 is rotated clockwise in FIG. 3 by the pressing operation part 37 against the action of the spring 42, the engaging part 36 is separated from the engaging step part 30. After that, blade 4
When it is rotated counterclockwise and folded between the rain plates 3, the engaging part 36 of the locking member 35 engages with the engagement holding part 31 of the blade 4, and the blade 4 is folded between the rain plates 3 as shown in FIG. is kept in an unused state. Furthermore, when the blade 4 is rotated clockwise from this unused state, the engaging part 36 of the locking par 35 engages with the engaging stepped part 30 again, as shown in FIG. held in state.

When the folding knife 1 constructed as described above is used or not used, the handle portion consisting of the decorative plate 2 and the middle plate 2 is gripped. The locking part 14 formed at the center of the back surface is inserted into the insertion hole 2 of the middle plate 3.
2 and twisting 90 degrees, the long axis portion of the locking portion 14 is locked with the short axis portion of the insertion hole 22, and both are fixed. It can be firmly attached and fixed without using it. Furthermore, the method of attaching this decorative plate 2 to the middle plate 3 is a very simple operation of aligning the long axes of both, inserting the locking part 14 into the insertion hole 22, and twisting either one. Can be assembled in a short time.

Furthermore, since the protrusion 21 formed on the intermediate plate 3 can be formed at the same time as the press molding of the intermediate plate 3, there is no need to add any special process to the conventional manufacturing process, resulting in low manufacturing costs. It is possible to embody it by Furthermore, by providing the protrusion 21 by press molding, the middle plate 3
A recess 23 is formed in the inner side 3a of the blade 4, and the locking portion 14 is disposed within the recess 23, so that the locking portion 14 does not protrude to the back side of the middle plate 3 and the blade 4 This does not impede the storage of the inside plate 3.

In addition, in this embodiment, the cap screw 24 was used as an auxiliary means for fixing the decorative plate 2 to the middle plate 3, but the cap screw 24
Since the portion of the middle plate 3 into which the cap screw 24 is screwed is made to protrude during press molding, the portion into which the cap screw 24 is screwed becomes wider, so that the mounting strength can be increased.

Note that the present invention is not limited to the above embodiments,
For example, it is also possible to make specific changes as shown below.

(1) In addition to this embodiment, the shape of the locking portion 14 is a cross shape,
It may be Y-shaped, square, hexagonal, etc., and any non-circular shape may be used.

However, in this case, the shape of the insertion hole 22 of the intermediate plate 3 needs to be made equal to the shape of the corresponding locking part 14.

(2) Although the folding knife 1 was used in this example,
The invention is not limited to this folding knife 1, and may be embodied in any type of cutlery provided with a normal handle.

(3) The size of the protruding member 15 is not limited, and can be freely selected from large to small according to its purpose.

(4) The types of elastomers include styrene elastomers with polystyrene as a hard segment and polybutadiene as a soft segment, olefin elastomers with polypropylene as a hard segment and EPDM as a soft segment, and polyester as a hard segment; Examples include polyester elastomers with non-grade polyether as soft segments, and polyamide elastomers with nylon as hard segments and polyol as soft segments.

Effects of the Invention As described in detail above, according to the present invention, in a handle composed of a middle plate and a decorative plate, a protruding member with a locking portion is provided on the inner surface of the decorative plate, and the middle plate has a providing a locking hole into which the locking portion is inserted and locked by being twisted;
Since both of them are attached and fixed, the decorative plate and the middle plate can be simply and easily attached and fixed without using an adhesive or the like, which is an excellent effect.

[Brief explanation of drawings]

1 to 7 show an embodiment embodying the present invention.
The figure is a perspective view showing the decorative plate, Figure 2 is a perspective view showing the middle plate,
Figure 3 shows the folding knife in use, a front view with one side plate removed, Figure 4 is a side sectional view with the decorative plate attached to Figure 3, and Figure 5 is the decoration. A front view of the main part showing the state where the middle plate is attached to the board, Figure 6 is A of Figure 5
- A sectional view, and FIG. 7 is a front view of the blade of FIG. 3 in an unused state. Sofifli + anti ・ ・ ・ 2 medium ten anti
・ ・ ・ 3 Sword blades...4 Connecting parts...13 Locking parts...14 Projecting members...15 Attendant holes...
22 Patent applicant Stock representative company Cosmo Industries agent Patent attorney On 1) Hironobu, Figure 1 Figure 2

Claims (1)

[Claims] 1. A pair of middle plates (3) that sandwich the blade (4) in a rotatable or non-rotatable manner, and a decorative plate made of rubber or rubber-like elastic material attached to the outer surface of the middle plates (3). (2) In the handle of a cutlery or the like, the inner surface (2a) of the decorative plate (2) is provided with a protruding member (15) having a locking part (14) formed in a non-circular shape. In addition, an engagement hole (22) into which the engagement part (15) is inserted and engaged by twisting is provided on the outer surface (3b) of the middle plate (3) facing the protruding member (15). A handle of a knife, etc. that is characterized by 2. The locking portion (14) is formed in a substantially elliptical shape, and its long axis is arranged in the short direction of the decorative plate (2), and the engagement hole (22) is formed in a substantially elliptical shape. The handle of a cutlery or the like according to claim 1, characterized in that the handle is formed into a shape and arranged so that its long axis is in the longitudinal direction of the decorative plate (2).