JP7208663B1 - cutlery - Google Patents

Abstract

An object of the present invention is to provide a knife capable of easily aligning a handle and a fixing member. A knife includes a blade, a handle, a base as a fixing member fixed to the handle, and a connecting mechanism for connecting the handle and the base. The connecting mechanism 50 includes a housing recess 51 that opens to the front end surface 20 a of the handle 20 and has a bottom surface 22 , a bolt 60 that is housed in the housing recess 51 , and a male screw portion 62 that opens to the rear end surface 30 a of the mouthpiece 30 . It has a female screw part 33 into which the tip is screwed. The accommodation recess 51 has a large diameter portion 52 that accommodates the head portion 61 and a small diameter portion 53 that accommodates the male screw portion 62 . A first gap G1 is provided between the head portion 61 and the bottom surface 22 in the axial direction of the housing recess 51 . A second gap G2 and a third gap G3 are provided between the head portion 61 and the large diameter portion 52 and between the male threaded portion 62 and the small diameter portion 53 in the radial direction of the housing recess 51, respectively. [Selection drawing] Fig. 2

Description

The present invention relates to cutlery.

In Patent Document 1, a long handle (referred to as a handle main body in Patent Document 1), a mouthpiece fixed to the front end of the handle, and a tail fixed to the rear end of the handle A knife is disclosed that includes a metal and a blade connected to a mouthpiece.

The handle has a through hole extending in its lengthwise direction. The through hole accommodates a connecting rod having male threads at both ends. Both ends of the connecting rod protrude from the through holes respectively.

A female thread is formed in each of the mouthpiece and the tail piece. The mouthpiece and tailpiece are screwed onto one end and the other end of the connecting rod, respectively. An adhesive is interposed between the front end of the handle and the base and between the rear end of the handle and the tail metal. With these, the mouthpiece and the tail metal are fixed to the front end and the rear end of the handle, respectively.

JP 2005-153065 A

By the way, when attaching the mouthpiece and the tail metal to the handle, from the viewpoint of functionality and design, these must be arranged so that there are no steps or gaps between the mouthpiece and the tail metal and the handle. Alignment is performed.

In the knife described in Patent Document 1, the mouthpiece is fixed to the handle by screwing the connecting rod. Therefore, when the end face of the handle and the end face of the die are in contact with each other, the relative positions of the die and the handle in the circumferential direction tend to vary. As a result, there is a risk that the design of the blade will be impaired. This is the same for the tail metal.

In addition, the more complicated the shape of the fixing member such as the mouthpiece and the end piece and the handle, the more difficult it becomes to align them, so the above problem becomes more conspicuous.

A knife for solving the above problems is a knife comprising a blade, an elongated handle, and a fixing member fixed to one end face in the length direction of the handle with an adhesive. and a connecting mechanism for connecting the handle portion and the fixing member, the connecting mechanism opening in one of the end surface of the handle portion and the opposing surface of the fixing member facing the end surface. a housing recess having a base and a bottom; a bolt having a head and a male screw portion extending from the head; and a female threaded portion that opens to the other of the opposing surfaces and into which the tip of the male threaded portion is screwed, wherein the accommodation recess includes a large diameter portion that accommodates the head; a small-diameter portion having a diameter smaller than that of the large-diameter portion to accommodate the male screw portion and to prevent the bolt from slipping out, and is located between the head portion and the bottom surface in the axial direction of the accommodation recess. is provided with a first gap, and a second gap and a third gap are provided between the head portion and the large diameter portion and between the male screw portion and the small diameter portion in the radial direction of the housing recess, respectively. A gap is provided.

When an operator fixes the fixing member to the end surface of the handle, the male threaded portion of the bolt protruding outside from the accommodation recess provided in one of the handle and the fixing member is provided on the other of the handle and the fixing member. The end face of the handle and the facing surface of the fixing member are brought into contact by screwing into the female thread.

Here, according to the above configuration, the first gap is provided between the head portion and the bottom surface in the axial direction of the accommodation recess. A second gap and a third gap are provided between the head portion of the bolt and the large diameter portion and between the male threaded portion and the small diameter portion of the bolt, respectively, in the radial direction of the housing recess. Therefore, until the handle and the fixing member are fixed with an adhesive, the first to third gaps allow the bolt to rotate relative to the accommodation recess and to move relative to the radial direction. As a result, the operator can rotate the handle and the fixing member relative to each other without changing the screwing amount of the bolt into the female thread while the end face of the handle and the facing surface of the fixing member are in contact with each other. can be moved relative to each other in the radial direction. Therefore, the operator can easily align the handle and the fixing member.

In addition, according to the above configuration, since the connecting mechanism is not exposed to the outside of the cutter, it is possible to suppress deterioration of the design of the cutter.
Therefore, it is possible to easily align the handle and the fixing member while improving the design of the blade.

In the knife described above, the housing recess has a mounting hole that opens to the one of the end surface and the facing surface and has the bottom surface, and a space that is positioned coaxially with the mounting hole and has a space between the bottom surface and the mounting hole. a tubular member attached to the mounting hole in a state in which the large-diameter portion is configured by the space, and the small-diameter portion is configured by the internal space of the tubular member. preferable.

According to this configuration, a mounting hole is provided in one of the handle portion and the fixing member, and after the bolt is accommodated in the mounting hole, the large diameter portion and the small diameter portion are mounted by mounting the cylindrical member in the mounting hole. A receiving recess having is configured. Therefore, the housing recess can be easily realized without dividing the handle into a plurality of parts.

In the blade described above, it is preferable that the bolt and the tubular member are made of metal, and a resin washer is provided between the tubular member and the head.
When the bolt and the tubular member are made of metal, when the amount of screwing of the bolt into the female thread portion increases, the bearing surface of the bolt head is pressed against the end surface of the tubular member, thereby The frictional force generated between the end face of the shaped member increases. As a result, the operator may find it difficult to rotate the handle and the fixing member relative to each other or to move the handle and the fixing member relative to each other in the radial direction while the end surface of the handle and the opposing surface of the fixing member are in contact with each other. There is

In this regard, according to the above configuration, since the bearing surface of the bolt head is pressed against the resin washer, the frictional force generated between the bolt head and the washer is become smaller in comparison. Therefore, it is possible to suppress the occurrence of the inconvenience as described above.

In the cutter described above, it is preferable that the accommodation recess is provided in the handle, and the female thread is provided in the fixing member.
Since the accommodating recess is provided with a large diameter portion and a small diameter portion, the part of the blade where the accommodating recess is provided must have a predetermined length.

In this respect, according to the above configuration, the accommodation recess is provided in the handle, which is originally elongated. Therefore, it is possible to suppress an increase in the length of the fixing member as compared with the case where the fixing member is provided with the accommodation recess. Therefore, an increase in the overall length of the cutting tool can be suppressed.

In the cutler described above, when the fixing member is the first fixing member and the connecting mechanism is the first connecting mechanism, an adhesive is applied to the end face opposite to the one end face in the length direction of the handle. It is preferable to further include a fixed second fixing member and a second connecting mechanism for connecting the handle and the second fixing member.

According to the same configuration, in a state in which the end surface of the handle and the facing surface of the second fixing member are in contact, the handle and the second fixing member can be fixed without changing the amount of screwing of the bolt into the female thread of the second coupling mechanism. The member can be relatively rotated and relatively moved in the radial direction. Therefore, the operator can easily align the handle and the second fixing member.

Therefore, it is possible to easily align the handle with each of the two fixing members while improving the design of the blade.

According to the present invention, it is possible to easily align the handle and the fixing member.

An exploded perspective view of a cutting tool in one embodiment. (a) is a cross-sectional view centering on the connecting mechanism of the cutting tool, and (b) is an enlarged cross-sectional view centering on the housing recess. Sectional drawing of the cutting tool of the 1st modification. Sectional drawing of the knife of the 2nd example of a change.

An embodiment in which the cutlery is a kitchen knife will be described below with reference to FIGS. 1 and 2. FIG.
As shown in FIG. 1, the blade includes a blade portion 10, an elongated handle portion 20, a mouthpiece 30 fixed to one end face in the length direction of the handle portion 20, and a handle portion 20 and a mouthpiece 30. and a connection mechanism 50 that connects the The blade portion 10 is fixed to the mouthpiece 30 . The base 30 is an example of a "fixing member".

Henceforth, the length direction of the handle|steering-wheel part 20 may only be called a length direction. In addition, in the length direction, the side where the blade portion 10 is located is called the front side, and the side opposite to the front side is called the rear side.
(Blade part 10)
The blade portion 10 has a blade body 11 and a connecting portion 12 extending from the blade body 11 toward the mouthpiece 30 . The connecting portion 12 is connected to the mouthpiece 30 .

Examples of materials for the blade portion 10 include metal materials and ceramics. The material of the blade portion 10 of this embodiment is a metal material such as stainless steel.
(Handle 20)
A cross-sectional shape perpendicular to the length direction of the handle 20 is, for example, octagonal. The cross-sectional shape has an outer edge gradually enlarged toward the rear side.

Materials for the handle 20 include, for example, wood, metal materials, and resin materials. The material of the handle 20 of this embodiment is wood.
As shown in FIG. 2(a), the handle 20 has a front end surface 20a perpendicular to the length direction. The handle portion 20 is provided with a mounting hole 21 that opens to the front end surface 20 a and has a bottom surface 22 . The cross-sectional shape of the attachment hole 21 is circular, for example.

A female thread 23 is provided in the mounting hole 21 . Female thread 23 is provided only in a region of a predetermined length from the opening edge of mounting hole 21 . That is, the mounting hole 21 has a portion where the internal thread 23 is not provided.

A tubular member 40 having a through hole 41 is attached to the attachment hole 21 . The cylindrical member 40 is positioned coaxially with the mounting hole 21 . The cross-sectional shape of the through hole 41 is circular.

Materials for the cylindrical member 40 include metal materials and resin materials. The material of the cylindrical member 40 of this embodiment is a metal material such as stainless steel.
A male thread 42 is provided on the outer peripheral surface of the tubular member 40 . The cylindrical member 40 is attached to the attachment hole 21 by screwing the male thread 42 into the female thread 23 . The cylindrical member 40 is attached to the attachment hole 21 with a space S between it and the bottom surface 22 of the attachment hole 21 .

As shown in FIG. 1, the front end surface of the cylindrical member 40 is provided with a pair of engaging grooves 43 with which a tool (not shown) is engaged.
(Clasp 30)
The base 30 has a block shape.

Examples of materials for the base 30 include metal materials and resin materials. The material of the base 30 of this embodiment is a metal material such as stainless steel.
A slit 31 for sandwiching the connecting portion 12 of the blade portion 10 is provided at the front end portion of the mouthpiece 30 .

As shown in FIG. 2( a ), the base 30 has two curved surfaces 32 located on opposite sides of the slit 31 . The two curved surfaces 32 are curved so as to approach each other toward the front.

A cross-sectional shape perpendicular to the length direction of the portion of the mouthpiece 30 on the rear side of the curved surface 32 is, for example, an octagonal shape. The cross-sectional shape has an outer edge gradually enlarged toward the rear side.

The mouthpiece 30 has a rear end face 30a orthogonal to the length direction. The rear end surface 30 a is a surface facing the front end surface 20 a of the handle 20 . The rear end face 30a of the mouthpiece 30 and the front end face 20a of the handle 20 have the same shape. The mouthpiece 30 and the handle 20 are flush with each other at their boundary.

The mouthpiece 30 is provided with a female screw portion 33 that opens to the rear end surface 30a and has a bottom surface 34. As shown in FIG. The female threaded portion 33 is provided coaxially with the mounting hole 21 .
A rear end surface 30a of the mouthpiece 30 is fixed to a front end surface 20a of the handle 20 via an adhesive (not shown).

(Coupling mechanism 50)
The connecting mechanism 50 has a housing recess 51 that opens to the front end surface 20a of the handle 20, a bolt 60 that is housed in the housing recess 51, and the female screw portion 33 described above.

The accommodation recess 51 is configured by the attachment hole 21 of the handle 20 and the tubular member 40 . The accommodation recess 51 has a large-diameter portion 52 and a small-diameter portion 53 having a smaller diameter than the large-diameter portion 52 .
The large diameter portion 52 is defined by the space S in the mounting hole 21 . The small-diameter portion 53 is defined by the internal space of the tubular member 40 , that is, the through hole 41 .

The bolt 60 has a head 61 and a male threaded portion 62 extending from the head 61 . The head 61 has, for example, a cylindrical shape. The diameter of the head portion 61 is larger than the diameter of the small diameter portion 53 , that is, the diameter of the through hole 41 .

Materials for the bolt 60 include metal materials and resin materials. The material of the bolt 60 of this embodiment is a metal material such as stainless steel.
The head 61 is accommodated in the large diameter portion 52 . The male threaded portion 62 is accommodated in the small diameter portion 53 . The bolt 60 is housed in the housing recess 51 with the tip of the male threaded portion 62 protruding outside the housing recess 51 . The tip of the male threaded portion 62 is screwed into the female threaded portion 33 of the mouthpiece 30 .

The length of the large-diameter portion 52 in the axial direction of the housing recess 51 is greater than the length of the head portion 61 in the coaxial direction. Therefore, a first gap G1 is provided between the head 61 and the bottom surface 22 of the mounting hole 21 , which is the bottom surface of the housing recess 51 , in the axial direction of the housing recess 51 .

As shown in FIG. 2B, the diameter of the large diameter portion 52 is larger than the diameter of the head portion 61 . Therefore, a second gap G2 is provided between the head portion 61 and the large-diameter portion 52 in the radial direction of the housing recess 51 . The second gap G2 is provided over the entire circumference of the housing recess 51 and over the entire length of the head 61 .

As shown in FIG. 2( a ), the diameter of the small diameter portion 53 is larger than the diameter of the male threaded portion 62 of the bolt 60 . Therefore, a third gap G3 is provided between the male threaded portion 62 and the small diameter portion 53 in the radial direction of the housing recess 51 . The third gap G3 is provided over the entire circumference of the housing recess 51 and over the entire length of the small-diameter portion 53 .

A disk-shaped resin washer 70 is provided between the tubular member 40 and the head 61 of the bolt 60 . The friction coefficient of washer 70 with respect to bolt 60 is smaller than the friction coefficient of cylindrical member 40 with respect to bolt 60 . Examples of materials for the washer 70 include resin materials such as polyamide.

The inner diameter of washer 70 is larger than the outer diameter of male threaded portion 62 and smaller than the diameter of through hole 41 . The outer diameter of washer 70 is substantially the same as the outer diameter of head 61 . Therefore, the washer 70 and the bolt 60 are prevented from slipping out of the mounting hole 21 by the tubular member 40 .

As shown in FIG. 2B, a fourth gap G4 is provided between the male screw portion 62 and the washer 70 in the radial direction of the housing recess 51. As shown in FIG. The size of the fourth gap G4 in the radial direction is, for example, greater than or equal to the size of the second gap G2 in the radial direction.

From the above, in a state in which the handle 20 and the mouthpiece 30 are not fixed with an adhesive, the gaps G2 to G4 prevent the rotation of the bolt 60 in the circumferential direction of the housing recess 51 and the rotation of the bolt 60 in the radial direction of the housing recess 51. Movement of the bolt 60 is allowed. Further, since the head portion 61 of the bolt 60 and the bottom surface 22 do not come into contact with each other due to the provision of the first gap G1, the above rotation and movement can be performed smoothly.

(Method of Fixing Handle 20 and Base 30)
When fixing the handle portion 20 and the mouthpiece 30 , the operator first accommodates the bolt 60 from the head portion 61 into the attachment hole 21 of the handle portion 20 . The tip of the male threaded portion 62 of the bolt 60 received in the mounting hole 21 protrudes outside the mounting hole 21 .

Next, the operator inserts the washer 70 into the mounting hole 21 while passing the washer 70 through the male threaded portion 62 .
Next, the worker screws the cylindrical member 40 into the mounting hole 21 while passing the male threaded portion 62 . As a result, the bolt 60 and the washer 70 are prevented from slipping out of the mounting hole 21 by the tubular member 40 . The attachment of the tubular member 40 to the attachment hole 21 is performed using, for example, a tool that engages with the engagement groove 43 .

Next, the operator applies an adhesive to at least one of the front end surface 20 a of the handle 20 and the rear end surface 30 a of the mouthpiece 30 . Thereafter, the worker brings the rear end surface 30a of the base 30 and the front end surface 20a of the handle 20 into contact by screwing the base 30 onto the male threaded portion 62 .

Then, when the adhesive is solidified, the handle 20 and the base 30 are fixed.
The operation of this embodiment will be described.
When the worker fixes the base 30 to the front end surface 20 a of the handle 20 , the handle 20 is secured by screwing the externally threaded portion 62 of the bolt 60 protruding from the accommodation recess 51 into the female threaded portion 33 provided in the base 30 . and the rear end surface 30a of the mouthpiece 30 are brought into contact with each other.

Here, a first gap G1 is provided between the head portion 61 and the bottom surface 22 in the axial direction of the housing recess 51 . A second gap G2 is provided between the head 61 of the bolt 60 and the large-diameter portion 52 in the radial direction of the accommodation recess 51 . A third gap G3 is provided between the male screw portion 62 and the small diameter portion 53 of the bolt 60 in the radial direction of the housing recess 51 . A fourth gap G4 is provided between the male screw portion 62 and the washer 70 in the radial direction of the housing recess 51 . Therefore, until the base 20 and the base 30 are fixed with an adhesive, the gaps G1 to G4 allow the base 30 and the bolt 60 to be integrally rotatable relative to the housing recess 51. It becomes possible to move relative to the direction. As a result, the operator can screw the handle 20 and the base 30 together without changing the screwing amount of the bolt 60 into the base 30 while the front end face 20a of the handle 20 and the rear end face 30a of the base 30 are in contact with each other. can be relatively rotated and can be relatively moved in the radial direction.

Effects of the present embodiment will be described.
(1) A first gap G1 is provided between the head portion 61 and the bottom surface 22 in the axial direction of the housing recess 51 . A second gap G2 is provided between the head 61 of the bolt 60 and the large-diameter portion 52 in the radial direction of the accommodation recess 51 . A third gap G3 is provided between the male screw portion 62 and the small diameter portion 53 of the bolt 60 in the radial direction of the housing recess 51 . A fourth gap G4 is provided between the male screw portion 62 and the washer 70 in the radial direction of the housing recess 51 .

According to such a configuration, the operator can easily align the handle 20 and the cap 30 because of the effects described above.
In addition, according to the above configuration, since the connecting mechanism 50 is not exposed to the outside of the cutter, it is possible to suppress deterioration of the design of the cutter.

Therefore, it is possible to easily align the handle 20 and the mouthpiece 30 while improving the design of the blade.
Further, according to the above configuration, the housing recess 51 is provided in the elongated handle 20 . Therefore, it is possible to suppress an increase in the length of the base 30 compared to the case where the base 30 is provided with the housing recess 51 . Therefore, an increase in the overall length of the cutting tool can be suppressed.

(2) The housing recess 51 is a cylindrical member that is mounted in the mounting hole 21 with a space S between the mounting hole 21 that opens to the front end surface 20a of the handle 20 and has the bottom surface 22 and the bottom surface 22. 40. A large-diameter portion 52 is formed by the space S. A small diameter portion 53 is formed by the inner space of the tubular member 40 .

According to this configuration, the mounting hole 21 is provided in the handle portion 20, and after the bolt 60 is accommodated in the mounting hole 21, the cylindrical member 40 is mounted in the mounting hole 21, thereby having the large diameter portion 52 and the small diameter portion 53. A housing recess 51 is configured. Therefore, the housing recess 51 can be easily realized without dividing the handle 20 into a plurality of parts.

(3) The bolt 60 and the tubular member 40 are made of metal. The washer 70 is made of resin.
When the bolt 60 and the tubular member 40 are made of metal, when the screwing amount of the bolt 60 into the mouthpiece 30 increases, the bearing surface of the head 61 is pressed against the end surface of the tubular member 40, thereby and the end surface of the cylindrical member 40 increases. As a result, it becomes difficult for the operator to relatively rotate the handle 20 and the mouthpiece 30 in a state where the front end surface 20a of the handle 20 and the rear end surface 30a of the mouthpiece 30 are in contact with each other, or move the handle 20 and the mouthpiece 30 relative to each other in the radial direction. It may become difficult.

In this respect, according to the above configuration, the bearing surface of the head 61 of the bolt 60 is pressed against the washer 70 made of resin, so the frictional force generated between the head 61 of the bolt 60 and the washer 70 is smaller than in the case described above. Therefore, it is possible to suppress the occurrence of the inconvenience as described above.

<Change example>
This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- As shown in FIG. 3, the blade may have a mouthpiece 30 and a tail piece 130 fixed to both ends of the handle 20 in the length direction. In this case, the cutting tool may include a connecting mechanism 50 connecting the handle 20 and the mouthpiece 30 and a connecting mechanism 150 connecting the handle 20 and the tail metal 130 . Note that the configuration of the coupling mechanism 150 is the same as that of the coupling mechanism 50 . The base 30 and the tail metal 130 in this modification are examples of the "first fixing member" and the "second fixing member", respectively, and the connection mechanism 50 and the connection mechanism 150 are the "first connection mechanism" and the "second fixing member", respectively. It is an example of "2 connection mechanism". In this configuration, the handle 20 and the tail metal 130 can be screwed together without changing the amount of screwing of the bolt 60 into the tail metal 130 while the rear end face 20b of the handle part 20 and the front end face 130a of the tail metal 130 are in contact with each other. can be relatively rotated and can be relatively moved in the radial direction. Therefore, the operator can easily align the handle portion 20 and the tail metal 130 . Therefore, it is possible to easily align the handle 20 and the mouthpiece 30 and the handle 20 and the tail metal 130 while improving the design of the blade.

- As shown in FIG. 4 , the blade may include a connection mechanism 50 that connects the handle 20 and the tail metal 130 , and the handle 20 and the mouthpiece 30 may be fixed by bolts 160 . The housing recess 51 of the handle 20 in the modified example opens at the rear end surface 20 b of the handle 20 . The handle 20 has a through hole 24 that opens to the bottom surface 22 of the housing recess 51 and the front end surface 20 a of the handle 20 . A bolt 160 having a head portion 161 housed in the housing recess 51 is inserted into the through hole 24 . The handle 20 and the mouthpiece 30 are fastened by bolts 160 . One end of the housing recess 51 is closed by inserting the bolt 160 into the through hole 24 . In this modified example, a gap is provided between the head 61 of the bolt 60 and the head 161 of the bolt 160 in the axial direction. The tail metal 130 in this modified example is an example of a "fixing member".

- Although the connection mechanism 50 of this embodiment has the accommodation recessed part 51 provided in the handle part 20, and the internal thread part 33 provided in the mouthpiece 30, it is not limited to this. The connecting mechanism 50 may have a female screw portion 33 provided on the handle portion 20 and a housing recess portion 51 provided on the mouthpiece 30 .

- The washer 70 can be omitted from the blade. In this case, the portion of the cylindrical member 40 facing the seat surface of the head 61 may be coated with a highly slidable paint. The paint preferably contains a resin material such as polytetrafluoroethylene (PTFE). If the washer 70 is omitted from the cutting tool, the cylindrical member 40 prevents the bolt 60 from slipping out of the mounting hole 21 .

The housing recess 51 may be configured by attaching a member integrally formed with the large diameter portion 52 and the small diameter portion 53 to a recess provided in the handle portion 20 . That is, the accommodation recess 51 may be configured by a member separate from the handle 20 .

- The female threaded portion 33 may be configured by attaching a member having a female thread to a recess provided in the mouthpiece 30 . That is, the female screw portion 33 may be configured by a member separate from the mouthpiece 30 .

- The female thread 23 may be omitted from the mounting hole 21 and the male thread 42 may be omitted from the tubular member 40 . In this case, for example, the tubular member 40 may be attached to the mounting hole 21 by press-fitting the tubular member 40 into the mounting hole 21 in which the bolt 60 is accommodated.

- The accommodation recess 51 may be configured by a stepped hole having a small diameter portion 53 and a large diameter portion 52 opening on the side opposite to the small diameter portion 53 . In this case, the opening of the large-diameter portion 52 may be closed by a closing member. In this configuration, the cylindrical member 40 can be omitted.

- The cross-sectional shape of the accommodation recessed part 51 can be changed into arbitrary shapes, such as polygonal shape.
- The diameter of the head 61 of the bolt 60 may be smaller than the through hole 41 of the tubular member 40 . Even in this case, the bolt 60 is prevented from slipping out of the mounting hole 21 via the washer 70 .

- The cross-sectional shape of the head 61 of the bolt 60 may be, for example, a polygonal shape such as a hexagonal shape.
- The shape of the front end surface 20a of the handle 20 and the shape of the rear end surface 30a of the base 30 may be different from each other.

- The cross-sectional shape of the handle 20 and the cross-sectional shape of the mouthpiece 30 may be arbitrary shapes such as a polygonal shape different from an octagonal shape or a circular shape.
- The blade of the present invention may be applied to blades other than kitchen knives, such as saws, sickles, axes, and various knives.

G1... First gap G2... Second gap G3... Third gap G4... Fourth gap S... Space 10... Blade part 20... Handle part 20a... Front end surface 20b... Rear end surface 21... Mounting hole 22... Bottom surface 30... Base 30a Rear end face 33 Internal threaded portion 40 Cylindrical member 50 Coupling mechanism 51 Accommodating recess 52 Large diameter portion 53 Small diameter portion 60 Bolt 61 Head 62 Male threaded portion 70 Washer 130 Tail metal 130a Front end Surface 150... Coupling mechanism 160... Bolt 161... Head

Claims (4)

A blade comprising a blade, an elongated handle, and a fixing member fixed to one end surface of the handle in the length direction via an adhesive,
A connection mechanism for connecting the handle and the fixing member is provided,
The connecting mechanism is
a housing recess that is open to one of the end surface of the handle portion and a facing surface of the fixing member that faces the end surface and has a bottom surface;
a bolt having a head and a male threaded portion extending from the head, the bolt being accommodated in the accommodation recess in a state in which a tip end of the male screw protrudes outside the accommodation recess;
a female threaded portion that opens to the other of the end surface and the opposing surface, and into which the tip of the male threaded portion is screwed;
The accommodation recess has a large-diameter portion that accommodates the head, and a small-diameter portion that is smaller in diameter than the large-diameter portion and accommodates the male screw portion and prevents the bolt from coming off,
A first gap is provided between the head portion and the bottom surface in the axial direction of the accommodation recess,
A second gap and a third gap are provided between the head portion and the large diameter portion and between the male screw portion and the small diameter portion in the radial direction of the housing recess ,
The accommodation recess is
a mounting hole that opens to the one of the end surface and the facing surface and has the bottom surface;
a cylindrical member positioned coaxially with the mounting hole and mounted in the mounting hole with a space between the cylindrical member and the bottom surface;
The large-diameter portion is configured by the space,
The small-diameter portion is configured by the inner space of the tubular member,
Cutlery. The bolt and the tubular member are made of metal,
A resin washer is provided between the tubular member and the head.
The knife according to claim 1 . The accommodation recess is provided in the handle,
The female threaded portion is provided in the fixing member,
The knife according to claim 1 or 2 . When the fixing member is the first fixing member and the connecting mechanism is the first connecting mechanism,
a second fixing member fixed via an adhesive to the end face opposite to the one end face in the length direction of the handle;
A second connection mechanism that connects the handle and the second fixing member,
The cutlery according to any one of claims 1 to 3 .

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