JP2000061171A - Hand sharp-edged tool and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily disassemble and classify main bodies and grip parts. SOLUTION: Scissors 29 consist of scissors pieces 11a, 11b which are respectively provided with grip parts 16a, 16b made of synthetic resins and are made openable and closable by means of a screw 28. The grip parts 16a and 16b are integrally molded at the scissors pieces 11a and 11b by an insert molding method. At the time of insert molding, engaging pins 20 as fixing members are fitted into the engaging holes 15a and 15b of the scissors pieces 11a and 11b from insertion holes 19a and 19b formed simultaneously with the grip parts 16a and 16b, by which the grip parts 16 and 16b and the scissors pieces 11a and 11b are securely fixed. The easy disassembly and classification of the grip parts 16a and 16b and the scissors pieces 11a and 11b are made possible by removing the engaging pins 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual instrument which can separate a grip portion such as scissors, a knife, pliers, and a knife from a main body, and a manufacturing method thereof.

[0002]

2. Description of the Related Art As a conventional hand-operated instrument, for example, scissors are composed of a pair of main bodies made of metal, and a synthetic resin grip attached to one end side thereof. When integrating the main body and the grip portion, first, one end of the main body is inserted into the grip portion through the opening for inserting the main body formed in the grip portion. Then, screws are screwed into holes formed at opposite positions of the gripping part sandwiching the main body and through holes formed through the main body to integrate the gripping part and the main body.

[0003]

In recent years, in order to reuse resources, a metal body and a synthetic resin grip are separately collected. When the main body becomes unusable, only the main body is replaced and the grip portion is reused.

However, in order to separate the main body from the grip, the screw had to be screwed back. But,
Since the screw is screwed through the grip part sandwiching the main body and the main body, the screw is caught by the main body and the grip part, and there is a problem that the screw retreating work and the sorting work are very troublesome.

The present invention has been made by paying attention to the problems existing in the prior art. It is an object of the present invention to provide a hand-operated instrument which can easily disassemble and separate the main body and the grip portion, and a manufacturing method thereof.

[0006]

In order to achieve the above-mentioned object, in the manual instrument according to claim 1, the grip part and the main body fitted in the fitting hole of the grip part are made of different materials. , A hole is provided in the grip portion, and a fixing member is inserted into the hole of the grip portion in a state where the main body and the grip portion are fitted to each other, and the tip is pressed against the main body to fix the main body and the grip portion, and The main body and the grip portion can be separated by separating the fixing member.

According to the second aspect of the present invention, the grip and the main body that fits into the fitting hole of the grip are made of different materials, the grip is provided with a hole, and the grip is tapered as a fixing member. An engagement hole is formed in the main body using a dowel pin, and the engagement pin is inserted into the engagement hole through the hole of the grip portion in a state where the main body and the grip portion are fitted together. The main body and the grip are fixed by inserting the main body and the grip, and the main body and the grip can be separated by separating the engaging pin.

A method for manufacturing a manual interest instrument according to claim 3 is
The method for manufacturing a manual instrument according to claim 1, wherein a cavity corresponding to the grip portion is formed in a pair of molds, and a hole forming portion for inserting a fixing member is provided in one of the molds. The molten resin is injected into the cavity while the main body or the slide mold is supported, the mold is opened after cooling and curing, and the manual device as a molded product is taken out.

A method of manufacturing a manual interest instrument according to claim 4 is
It is a manufacturing method of the manual instrument of Claim 2, Comprising: The cavity corresponding to the said grip part was formed in a pair of metal mold | die, and the engaging pin as a fixing member was engaged with the engaging hole of a main body. In the state, inject the molten resin supporting in the cavity,
After cooling and curing, the mold is opened to take out the manual device as a molded product.

A method of manufacturing a manual instrument according to claim 5 is
It is a manufacturing method of the manual instrument of Claim 2, Comprising: A cavity corresponding to the said grip part is formed in a pair of metal mold | die, and an engaging pin as a fixing member is inserted in either metal mold | die. A hole forming part is provided, with the hole forming part engaged with the engagement hole of the main body, the molten resin is injected while being supported in the cavity, and the mold is opened after cooling and curing to form a molded product. This is to take out the manual instrument.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. (First Embodiment) As shown in FIGS. 1 and 2, the scissor pieces 11a and 11b as the main body are formed of metal, ceramic or the like in a substantially doglegged shape. The blade portion 12 is formed by polishing one side edge of one end side of the scissors pieces 11a and 11b, and the handle portions 13a and 13b are provided on the other end side. The handle portions 13a and 13b are formed so that the width thereof becomes narrower toward the tip thereof. Further, the handle portions 13a, 13b
Both sides of the tip are polished. Shaft holes 14a, 14b
Are formed on the other end side of the scissors pieces 11a and 11b from the center thereof, and the engagement holes 15a and 15b are formed on the handle portion 1 respectively.
They are formed at the tips of 3a and 13b, respectively.

The synthetic resin grips 16a and 16b are annular and have a finger-holding hole 17 formed in the center thereof.
8a and 18b are formed on one end side of the grip portions 16a and 16b. Insertion holes 19a and 19b as a pair of upper and lower holes
The fitting holes 18a, 1 are provided at the base ends of the grips 16a, 16b.
It is formed at a position facing each other across 8b. Each of the insertion holes 19a and 19b is formed in an inverted conical shape whose diameter is reduced toward the inside. Then, the fitting holes 18 of the grip portions 16a and 16b
a and 18b, the handle portion 13 of the scissors pieces 11a and 11b
A and 13b can be engaged and disengaged. In the fitted state, the engagement holes 15a, 15b and the insertion hole 19a,
19b is adapted.

The engaging pin 20 as a fixing member is formed of a synthetic resin in a substantially tapered shape so that the diameter decreases from the base end portion to the tip end portion, and a step portion 20a is formed in the middle portion thereof. In addition, the engagement pin 20 has the insertion hole 19
It is formed in a size that can be fitted into the a and 19b and the engagement holes 15a and 15b. That is, the outer diameter of the base end portion of the engagement pin 20 corresponds to the inner diameter of one end side of the insertion holes 19a and 19b, and the outer diameter of the tip end portion corresponds to the inner diameter of the other end side of the insertion holes 19a and 19b. It is like this.

Then, the handle portion 1 is provided in each of the fitting holes 18a and 18b.
3a and 13b are fitted into each other, and the insertion holes 19a and 19b are inserted.
b and the engaging holes 15a and 15b are associated with each other. Further, the distal end side of the engagement pin 20 is inserted from one end side of each of the insertion holes 19a and 19b, respectively, and the engagement holes 15a and 15b.
To the other end of the insertion holes 19a and 19b through the engaging pin 2
As shown in FIG. 3, the grips 16a, 1b are attached to the scissors pieces 11a, 11b by inserting and fitting the tip end of 0.
6b can be fixed.

The first interposition member 21 made of synthetic resin is formed in a disk shape, and a first mounting hole 22 is formed in the center thereof. The second interposition member 23 made of synthetic resin has an annular receiving portion 2
4 and a cylindrical portion 25 formed in the center thereof. The second mounting hole 26 is formed at the center of the cylindrical portion 25.

Then, the first interposing member 21 is attached to the grip portion 16
a, which engages with the shaft hole 14a of the one scissor piece 11a, and the cylindrical portion 25 of the second interposition member 23, the shaft hole 14b of the other scissor piece 11b with the grip portion 16b and the one scissor piece. It engages with the shaft hole 14a of 11a. Then, the first mounting hole 22 and the second
The mounting holes 26 are made to correspond to each other, and the screws 28 are screwed into the second mounting holes 26 from the first mounting holes 22. As a result,
As shown in, the scissors pieces 11a and 11b respectively provided with the grip portions 16a and 16b are openably and closably supported by the screws 28 via the interposition members 21 and 23, thereby forming scissors 29.

Next, a method of manufacturing the scissors 29 will be described. As shown in FIG. 4A, the pair of molds 30 for molding the scissors 29 by the insert molding method is the fixed mold 3
0a and the movable die 30b. Fixed type 30
The outer shape of the grip portion 16a or 16b is formed on the inner surface of a. Further, the fixed mold 30a has scissor pieces 11a or 11
A fixing portion (not shown) for fixing b at a predetermined position is formed. On the other hand, on the inner surface of the movable die 30b, the grip 1
The contour of 6a or 16b is stamped. The hole forming portion 31 having a shape corresponding to the engaging pin 20 is provided in the movable die 3
It is formed so as to project from a predetermined position on the inner surface of 0b toward the fixed mold 30a. A step portion 31a is formed on the outer peripheral surface of the center of the hole forming portion 31.

Then, as shown in FIG. 4B, when the movable die 30b is moved in the direction of the fixed die 30a and the two die 30 are clamped, the grip portion 16a or 16b is placed in the die 30.
A cavity 32 corresponding to the outer shape of is formed. Also,
The tip of the hole forming portion 31 contacts the inner surface of the fixed die 30a. A gate (not shown) is communicated with the cavity 32, and molten synthetic resin is injected into the cavity 32.

When molding the grip portion 16a, first, as shown in FIG. 4A, with the movable die 30b opened from the fixed die 30a, the scissors piece 11 is attached to the fixed portion of the fixed die 30a.
The handle 13a of a is fixed. Next, as shown in FIG. 4B, the movable die 30b is moved in the fixed die 30a direction, and the hole forming portion 31 is inserted into the engaging hole 15a of the handle portion 13a. At this time, the tip portion of the hole forming portion 31 penetrates the engaging hole 15a, and the step portion 31a engages with the handle portion 13a so that no gap is formed between the handle portion 13a and the step portion 31a. There is. Further, the tip surface of the hole forming portion 31 has a fixed mold 3
It contacts the inner surface of 0a.

Next, as shown in FIG. 4 (c), the mold 3
A molten synthetic resin, which is a raw material of the grip portion 16a, is injected into the cavity 32 from the gate formed at 0. Then, after the raw material is cooled and solidified, the movable die 30 b is fixed to the fixed die 30.
The hole forming portion 31 is pulled out from the engagement hole 15a and the grip portion 16a while being separated from the mold a, and the grip portion 16 is pulled out.
a is taken out together with the handle portion 13a of the scissors piece 11a inserted therein.

At this time, as shown in FIG.
a is formed by the outer periphery of the other end of the scissors piece 11a, and the insertion hole 1
9a is formed at a position facing the base end portion of the grip portion 16a via the fitting hole 18a.

Then, the distal end side of the engagement pin 20 is inserted from one end side of the insertion hole 19a, and the engagement hole 1 is formed.
5a is penetrated and it inserts in the other end side of the insertion hole 19a, and is fitted. Further, the engaging pin 20 is inserted into the insertion hole 19a and the engaging hole 1
Push into 5a and force fit. As a result, as shown in FIG. 1, the grip 16a is attached to the scissor piece 11a.
It can be fixed by 0. Therefore, by the insert molding method, the grip portion 16a is integrally molded with the scissor piece 11a,
The positional relationship can be fixed.

Then, by the same method as described above, the scissors piece 1
The grip portion 16b is integrally molded with the 1b and fixed. further,
The first interposing member 21 is engaged with the shaft hole 14a of the one scissor piece 11a, and the cylindrical portion 25 of the second interposing member 23 is connected to the shaft hole 14b of the other scissor piece 11b and the one scissor piece 11a. Shaft hole 14a
Engage with. Then, from the first mounting hole 22 to the second mounting hole 2
Screw the screw 28 into the 6. As a result, the grips 16a, 1
A pair of scissors pieces 11a and 11b respectively provided with 6b are openably and closably supported by screws 28 via the first and second interposing members 21 and 23, and scissors 29 are configured.

Scissors piece 11 of scissors 29 obtained by the above method
When the a and 11b are separated from the grip portions 16a and 16b, first, the screws 28 attached to the shaft holes 14a and 14b through the first and second interposing members 21 and 23 are pulled out, and then the first and the first 2 Insert the interposition members 21 and 23 into the scissors pieces 11a and 1
Remove from 1b and disassemble the pair of scissor pieces 11a, 11b. Then, the thin end portion of the ballpoint pen or the like is brought into contact with the tip end portion of the engagement pin 20 through the insertion holes 19a and 19b into which the tip end portion of the engagement pin 20 is fitted.

Then, by further pushing the engaging pin 20 with a ballpoint pen or the like, the engaging pin 20 is inserted.
The fitting with 9a, 19b and the engaging holes 15a, 15b is released, and it comes out. Next, by grasping the grip portion 16a or 16b and pulling the scissor piece 11a or 11b, the scissor piece 11a or 11b is pulled out from the fitting hole 18a or 18b of the grip portion 16a or 16b. At this time, the scissors piece 11a,
The handle portions 13a, 13b of 11b are formed in a tapered shape whose diameter decreases toward the tip, and the handle portions 13a, 13b
Both sides of the tip of 13b are polished. Therefore, the scissors pieces 11a and 11b can be easily extracted from the grip portions 16a and 16b.

As a result, the scissors pieces 11 constituting the scissors 29.
a, 11b, grip portions 16a, 16b, first interposing member 2
The first and second interposition members 23 and the screw 28 can be disassembled, and the metal scissor pieces 11a and 11b and the screw 2 can be disassembled.
8 and the grip portions 16a and 16b made of synthetic resin, the first interposition member 21, and the second interposition member 23 can be completely separated.

As described above, according to the first embodiment, the following effects are exhibited. -According to the scissors 29 of the first embodiment, the engagement pin 20 is formed in a taper shape so that the diameter thereof decreases from the base end portion to the tip end portion thereof, and the insertion holes 19a and 19b have one end side to the other end side. The inner diameters thereof are formed so as to become closer to. Therefore, the engagement pin 20 fitted in the insertion holes 19a and 19b and the engagement holes 15a and 15b can be easily pulled out by pressing the tip portion thereof. Therefore, the grips 16a, 16b and the scissors pieces 11a, 1
1b and 1b can be easily disassembled to easily separate them. In addition, resources can be reused and it can contribute to environmental protection.

According to the scissors 29 of the first embodiment, the grip portions 16a and 16b are scissor pieces 11 formed by the insert molding method.
The handle portions 13a and 13b of a and 11b are integrally formed. Therefore, the work for integrating the scissor pieces 11a, 11b and the grip portions 16a, 16b can be omitted, and the manufacturing time can be shortened, and the production efficiency can be improved.

According to the scissors 29 of the first embodiment, the handle portions 13a, 13b of the scissors pieces 11a, 11b are attached to the grip portions 16a,
16b is provided. Then, the insertion holes 19a, 19
The engaging pin 20 is fitted into the engaging holes 15a, 15b from b to fix the grip portions 16a, 16b to the scissor pieces 11a, 11b. Therefore, the grip portion 1 is not attached to the scissors pieces 11a and 11b.
6a and 16b can be firmly fixed, and the grip portion 16
It is possible to reliably prevent the a and 16b from coming off the scissor pieces 11a and 11b.

According to the scissors 29 of the first embodiment, a step portion 31a is formed on the central outer peripheral surface of the hole forming portion 31. Therefore, when the grip portions 16a and 16b are formed, the stepped portion 31a engages with the handle portions 13a and 13b and the handle portions 13a and 1b.
A gap is prevented from being formed between 3b and the stepped portion 31a of the hole forming portion 31. As a result, the synthetic resin is prevented from adhering to the periphery of the engaging holes 15a, 15b of the handle portions 13a, 13b, and the stepped portion 20a of the engaging pin 20 is removed from the handle portions 13a, 13b.
Can be securely engaged with.

According to the scissors 29 of the first embodiment, the step portion 20a is formed at the center of the outer peripheral surface of the engagement pin 20. Therefore, the insertion holes 19a of the grip portions 16a and 16b,
19b and engaging holes 15a, 15b of the handle portions 13a, 13b
When the engaging pin 20 is fitted in the
It is possible to prevent the engagement pin 20 from engaging with the engagement holes 15a and 15b more than the required amount by engaging with the engagement holes 3a and 13b. Therefore, the work of extracting the engagement pin 20 from the insertion holes 19a and 19b and the engagement holes 15a and 15b can be easily performed.

(Second Embodiment) In each of the following embodiments, differences from the second embodiment will be mainly described.

In the second embodiment, the grip portion 16a or 16
In the pair of molds 30 for molding b, the grip 1
The hole forming portion 31 for forming the insertion hole 19a or 19b in 6a or 16b is omitted.

Then, for example, when molding the grip portion 16a on the handle portion 13a of one scissor piece 11a, first, the scissor piece 1 is formed.
The engagement pin 20 is previously inserted into the engagement hole 15a of 1a. At this time, the engagement pin 20 is formed of acrylonitrile-butadiene-styrene copolymer resin (ABS resin). Next, the scissors piece 11a is fixed to the fixed portion of the fixed die 30a, and the movable die 30b is fixed to the fixed die 30a.
Direction, and both molds 30 are clamped. Finally, polypropylene having a lower melting temperature than the ABS and another ABS resin is injected from the gate to insert-mold the grip portion 16a.

As a result, the engaging pin 20 previously inserted into the engaging hole 15a forms the insertion hole 19a in the grip 16a, and the grip 16a and the scissors piece 11a are fixed to each other. Therefore, the work of fitting the engagement pin 20 into the engagement hole 15a of the scissor piece 11a from the insertion hole 19a of the grip portion 16a can be omitted, and the manufacturing time can be shortened.

Further, since the ABS resin forming the engaging pin 20 and the polypropylene forming the grip portion 16a have low adhesiveness, it is possible to prevent the engagement pin 20 and the grip portion 16a from being joined. . Therefore, the engagement pin 20 can be easily pulled out from the insertion hole 19a and the engagement hole 15a, and the scissors piece 11a and the grip portion 16a can be easily disassembled,
The separation can be easily performed. Furthermore, movable type 3
Since the step of forming the hole forming portion 31 in 0b can be omitted, the structure of the mold 30 can be simplified and the manufacturing cost can be reduced.

(Third Embodiment) In the third embodiment, as shown in FIG. 5, the handle portion 13 of the scissors pieces 11a and 11b is used.
Engagement holes 15a and 15b are not formed at the tips of a and 13b. Further, as shown in FIG. 6A, the grip portion 16a
Or in a pair of molds 30 for molding 16b,
The hole forming portion 31 formed on the inner surface of the movable die 30b is the first
It is formed shorter than the hole forming portion 31 of the embodiment. That is, when the handle portions 13a or 13b of the scissor pieces 11a or 11b are fixed to the fixed portion of the fixed die 30a and both the dies 30 are clamped, the tip end surface of the hole forming portion 31 has a handle portion 13a or 13b.
It comes into contact with.

Then, for example, when molding the grip portion 16a of one scissor piece 11a, first, the handle portion 13a of the scissor piece 11a is fixed to the fixed portion of the fixed mold 30a. Then, as shown in FIG. 6B, the movable die 30b is moved in the fixed die 30a direction, and the hole forming portion 31 is brought into contact with the handle portion 13a.

Next, as shown in FIG. 6C, a molten synthetic resin, which is a raw material of the grip portion 16a, is injected into the cavity 32 from the gate. Then, after the raw material is cooled and solidified, the movable die 30b is separated from the fixed die 30a to open the die, the hole forming portion 31 is pulled out from the grip portion 16a, and the grip portion 16a is inserted into the scissors piece 11a.
Together with the handle 13a. At this time, the insertion hole 19
A is formed from the outer surface of the base end of the grip portion 16a to a position reaching the handle portion 13a.

Then, a wood screw 33 as a fixing member is screwed in from one end side of the insertion hole 19a. At this time, FIG.
As shown in (c), since the insertion hole 19a is not formed with a screw hole, a female screw is formed at the same time when the wood screw 33 is screwed in as shown in FIG.
a is formed. Then, the grip 16 by the wood screw 33
The positional relationship between the scissor piece 11a and the grip portion 16a can be fixed by pressing a against the scissor piece 11a.

Therefore, according to the third embodiment, the scissors piece 11 is used.
The engagement hole 15a is not formed in a. Therefore, it is possible to save the trouble of fitting the wood screw 33 as the fixing member to the scissors piece 11a, so that the work of fixing the grip portion 16a and the scissors piece 11a can be easily performed.

(Fourth Embodiment) In the fourth embodiment, as shown in FIG. 7, the handle portion 13 of the scissors pieces 11a and 11b.
The engagement holes 15a and 15b are omitted at the tips of a and 13b. On the other hand, as shown in FIG. 9, scissor pieces 11a,
When 11b and the grip portions 16a, 16b are integrated, the tip of the wood screw 33 as a fixing member inserted from one end side of the insertion holes 19a, 19b contacts the handle portions 13a, 13b of the scissors pieces 11a, 11b. Recesses 35a, 35b in position
Are recessed by a press working method or the like.

Further, as shown in FIG. 8, the handle portions 13a, 1
Arc-shaped cutout portions 36a and 36b are formed at positions corresponding to the one side edge portions of the concave portions 35a and 35b of the one side edge portion 3b. Therefore, when manufacturing the scissors pieces 11a and 11b,
When the recesses 35a, 35b are pressed and deformed in the handle portions 13a, 13b by a pressing method or the like, the edges of the handle portions 13a, 13b bulge toward the cutout portions 36a, 36b. Therefore, it is possible to prevent the surfaces of the handle portions 13a and 13b opposite to the pressed surfaces from protruding by pressing.

Further, in the pair of molds 30 for molding the grip portions 16a or 16b, in the fourth embodiment, the handle portions 13a, 13b of the scissor pieces 11a, 11b are fixed to the fixing portion.
Instead of fixing the scissors, the handle portion 13 of the scissors pieces 11a and 11b
A slide die having a size corresponding to a and 13b is fixed. The hole forming portion 31 formed on the inner surface of the movable die 30b is
It is formed to have substantially the same size as the hole forming portion 31 of the third embodiment. That is, when the slide die is fixed to the fixed portion of the fixed die 30a and both the dies 30 are clamped, the hole forming portion 3
The tip end surface of 1 is in contact with a slide type.

Then, for example, when molding the grip portion 16a of one scissor piece 11a, first, the slide die is fixed to the fixed portion of the fixed die 30a. Then, the movable die 30b is moved toward the fixed die 30a, and the hole forming portion 31
Abut on the slide type.

Next, the molten synthetic resin, which is the raw material of the grip portion 16a, is injected into the cavity 32 from the gate. Then, after the raw material is cooled and solidified, the slide die is pulled out from the fixed portion, the movable die 30b is separated from the fixed die 30a and the die is opened, and the hole forming portion 31 is gripped by the grip portion 16
Remove from a. At this time, the insertion hole 19a is formed in the grip 16
It is formed from the outer surface of the base end portion of a to the position reaching the handle portion 13a of the scissors piece 11a to be inserted later.

Then, the handle portion 13a of the scissor piece 11a is fitted into the fitting hole 18a formed by the slide mold, and the insertion hole 19a and the recess 35a are made to correspond to each other. A wood screw 33 as a fixing member is screwed in from one end side of the insertion hole 19a of the grip portion 16a. At this time, since no screw hole is formed in the insertion hole 19a, a female screw is formed at the same time when the wood screw 33 is screwed in, and the screw hole 34 is formed in the insertion hole 19a.

Further, the wood screw 33 is screwed in, and the tip thereof is brought into pressure contact with the recess 35a. As a result, as shown in FIG. 9, the positional relationship between the scissor piece 11a and the grip portion 16a can be fixed by pressing the grip portion 16a against the scissor piece 11a with the wood screw 33. Further, the scissors piece 11a is grasped by the grip portion 1
Even if the pulling direction of 6a is pulled, the scissors piece 11a can be prevented from slipping out of the grip portion 16a due to the engagement between the inner peripheral surface of the recess 35a and the tip of the wood screw 33.

Therefore, according to the fourth embodiment, the scissors piece 11
When manufacturing a and 11b, the recesses 35 are formed in the handle portions 13a and 13b.
When a and 35b are pressed and deformed by a press working method or the like, the edges of the handle portions 13a and 13b are notched portions 36a and 3b.
Swell in 6b direction. Therefore, it is possible to prevent the surfaces of the handle portions 13a and 13b opposite to the pressed surfaces from protruding by pressing. As a result, the handle portion 13 of the scissors pieces 11a and 11b.
The surfaces of a and 13b become smooth, and grips 16a and 16b
When pulling out the scissors pieces 11a and 11b from the grips 16
The handle portions 13a and 13b can be easily pulled out without being caught by the handle portions a and 16b.

Further, the handle portions 13a of the scissors pieces 11a and 11b,
13b, recesses 35a, 3 are provided at positions where the tips of the wood screws 33 screwed from the insertion holes 19a, 19b come into contact with each other.
5b is formed. Therefore, the scissors pieces 11a and 11b
Even when pulling the grips 16a and 16b in the pulling-out direction, the scissors pieces 11a and 11b are engaged with the grips 16a and 1b by the engagement between the inner peripheral surfaces of the recesses 35a and 35b and the tips of the wood screws 33.
It is possible to prevent the escape from 6b.

The above embodiment may be modified and embodied as follows. The structure similar to that of each embodiment is adopted for the manual instrument 29 including the metal main body 11 such as a knife, pliers, and a knife and the grip 16 made of synthetic resin.

Even with this structure, the metal main body 11 and the synthetic resin grip 16 can be easily disassembled and separated, which contributes to environmental protection. -In 1st, 3rd, or 4th embodiment, the hole formation part 3
1 is formed on the fixed die 30a, and the hole forming portion 3 of the movable die 30b is formed.
Omit 1 In addition, in the third or fourth embodiment, the hole forming portions 31 are provided on both the fixed die 30a and the movable die 30b.

With this structure, the grip 16a,
When molding 16b, the insertion holes 19 are formed in the grips 16a and 16b.
a and 19b can be formed. Alternatively, when configured in this way, the grip portion 1 formed by insert molding
In 6a and 16b, insertion holes 19a and 19b can be formed in both of the grip portions 16a and 16b sandwiching the scissors pieces 11a and 11b. When the wood screw 33 is screwed in, the pair of wood screws 33 press the scissors pieces 11a and 11b against the grip portions 16a and 16b more firmly, and
It is possible to more reliably prevent the scissor pieces 11a and 11b from coming off from the a and 16b.

In the first or second embodiment, the engaging holes 15a and 15b are formed at a plurality of positions, and the insertion holes 19a and 19 are provided at positions corresponding to the plurality of engaging holes 15a and 15b.
Provide multiple b. And each insertion hole 19a, 19b
And engaging pin 20 in engaging hole 15a, 15b, respectively.

In this structure, the grip portions 16a, 1 are attached to the scissor pieces 11a, 11b by the plurality of engaging pins 20.
6b can be fixed more firmly. -In the third or fourth embodiment, the insertion holes 19a, 1
9b are formed at a plurality of locations, and wood screws 33 are screwed into them to fix the grip portions 16a, 16b and the scissors pieces 11a, 11b.

With this structure, the grip portions 16a and 16b can be more firmly fixed to the scissor pieces 11a and 11b by the wood screws 33 as a plurality of fixing members. -The fixed mold 30a and the movable mold 30b are arranged vertically so that both molds 30 can be clamped in the left-right direction so that the molds can be opened.

Even with this structure, the scissors pieces 11a,
The grip portions 16a and 16b can be formed on 11b. -In 1st Embodiment, instead of the scissors piece 11a, 11b, fixing the slide type | mold with which the hole was formed to the fixed part of the fixed type | mold 30a. After forming the grip portions 16a and 16b, the slide die is extracted, and the handle portions 13a and 13b of the scissor pieces 11a and 11b are fitted into the fitting holes 18a and 18b formed by the slide die, and the insertion holes 19a and 19b are inserted. Through the engaging pin 20 from the grips 16a, 16b and the scissors piece 1
Fix 1a and 11b. Even with this structure, the grip portions 16a and 16b can be firmly fixed to the scissor pieces 11a and 11b by the engagement pin 20.

Further, the technical idea understood from the above embodiment will be described below. The manual instrument according to claim 1 or 2, wherein the main body is made of metal, and the grip portion is made of synthetic resin.

With this configuration, the main body is
It is preferably formed on scissors, knife blades, and the like. Also,
The grip portion is preferable because its molding is easy. Further, the main body and the grip portion can be easily disassembled, and the separation can be easily performed.

The manual instrument according to claim 1 or 2, wherein the other end of the main body on which the grip portion is molded is formed so that its width becomes narrower toward the tip. With this configuration, the work of pulling out the main body from the grip portion can be easily performed.

The handheld instrument according to claim 2, wherein the engagement pin as the fixing member is formed in a substantially truncated cone shape, and a step portion is formed in an intermediate portion thereof. With this structure, when the engaging pin is fitted in the hole of the grip portion and the engaging hole formed in the main body, the step portion engages with the main body, and the engaging pin is formed in the engaging hole more than the required amount. It is possible to prevent fitting. Therefore, the work of extracting the engagement pin from the hole of the grip portion and the engagement hole can be easily performed.

The manual instrument according to claim 1, wherein a recess is formed in the main body at a position where the tip of the fixing member inserted through the hole of the grip portion comes into contact. With such a configuration, even if the main body is pulled in the pulling-out direction of the grip portion, the main body can be prevented from coming out of the grip portion by the engagement between the inner peripheral surface of the recess and the tip of the fixing member.

In the main body, the recess is formed at a position where the tip of the fixing member inserted from the hole of the grip portion comes into contact, and the notch is formed at one side edge of the recess. Manual instrument.

With this structure, when the recess is formed in the main body by a press working method or the like, the edge of the main body bulges toward the notch. Therefore, it is possible to prevent the surface opposite to the pressed surface of the main body from protruding by the pressing. As a result, the surface of the main body becomes smooth, and when the main body is pulled out from the grip portion, the main body can be easily pulled out without being caught by the grip portion.

The method for manufacturing a manual instrument according to claim 5, wherein the hole forming portion is formed in a substantially truncated cone shape, and a step portion is formed in an intermediate portion thereof. With this configuration, when the pair of molds are clamped and the molten resin is injected into the cavity formed inside, the tip of the hole forming portion engages with the engaging hole and The portion engages with the body to prevent a gap from being formed between the body and the step of the hole forming portion. As a result, it is possible to prevent the synthetic resin from adhering to the periphery of the engagement hole of the main body, and to reliably engage the stepped portion of the engagement pin as the fixing member with the main body.

[0066]

Since the present invention is constructed as described above, it has the following effects. According to the manual instrument of the invention described in claim 1, the main body and the grip portion can be easily disassembled and separated.

According to the second aspect of the present invention, the engaging pin as a fixing member is fitted into the engaging hole formed in the main body and the hole formed in the grip portion, thereby providing the main body with the main body. The grip part can be firmly fixed to prevent the main body from coming out of the grip part.

According to the method of manufacturing a manual electric appliance of the third aspect of the present invention, the fixing member is screwed into the hole formed in the grip portion, and the main body is pressed against the grip portion. Therefore, the grip portion can be firmly fixed to the main body. Further, since the main body has no engagement hole, the fixing member is fitted only in the insertion hole. As a result, the work of removing the fixing member can be easily performed, and the time for separating the main body and the grip portion can be shortened.

According to the method of manufacturing a manual instrument of the present invention as defined in claim 4, since the grip portion is formed in a state where the engaging pin as the fixing member is inserted into the main body, the grip portion is formed with respect to the main body. It can be fixed more firmly. Further, it is possible to save the trouble of fitting the engagement pin.

According to the method for manufacturing a manual instrument according to the fifth aspect of the present invention, a hole can be formed in the grip portion at the same time when the grip portion is formed, and the grip portion can be integrally formed in the main body.

[Brief description of drawings]

FIG. 1 is a perspective view showing scissors as a manual instrument of the first embodiment.

FIG. 2 is an exploded perspective view showing scissors as a manual instrument of the first embodiment.

FIG. 3 is a partial side sectional view showing a main body and an engagement pin in a grip portion.

FIG. 4A is a partial side sectional view showing a state where a fixed die and a movable die are opened, and FIG. 4B is a partial side sectional view showing a state where the die is clamped and the main body is inserted into the die. (C) is a partial side sectional view showing a state where a synthetic resin is injected between the molds.

FIG. 5 is a partial side sectional view showing a grip portion of a third embodiment.

6A is a partial side sectional view showing a state where a mold of the third embodiment is opened, and FIG. 6B is a partial side sectional view showing a state where a main body is inserted into the mold of the third embodiment; FIG. 6C is a partial side sectional view of the mold of the third embodiment in which a synthetic resin is injected.

FIG. 7 is a plan view showing a scissor piece serving as a main body of a fourth embodiment.

FIG. 8 is a partial side view showing a recess and a cutout portion of the scissors piece according to the fourth embodiment.

FIG. 9 is a partial side sectional view showing a grip portion of a fourth embodiment.

[Explanation of symbols]

11a ... Scissors piece as main body, 11b ... Scissors piece as main body, 15a ... Engagement hole, 15b ... Engagement hole, 16a ... Gripping part, 16b ... Gripping part, 18a ... Fitting hole, 18b ... Fitting hole, 19a ... Insertion hole as a hole, 19b ... Insertion hole as a hole, 20 ... Engaging pin as a fixing member, 29 ... Scissors as a manual instrument, 30a ... Fixed mold as a mold, 30b ...
Movable die as a die, 31 ... Hole forming portion, 32 ... Cavity, 33 ... Wood screw as a fixing member.

Claims (5)

[Claims] 1. A grip part and a main body that fits into a fitting hole of the grip part are made of different materials, a hole is provided in the grip part, and the grip part of the grip part is fitted with the main body and the grip part. A manual instrument comprising a fixing member that is inserted into the hole and the tip of which is pressed against the main body to fix the main body and the grip portion, and by separating the fixing member, the main body and the grip portion can be separated. 2. A grip part and a main body that fits into a fitting hole of the grip part are made of different materials, a hole is provided in the grip part, and a tapered engagement pin is used as a fixing member. An engaging hole into which a dowel pin is inserted is formed, and an engaging pin is inserted into the engaging hole through the hole of the grip portion in a state where the main body and the grip portion are fitted to each other. A handheld instrument in which the main body and the grip portion are configured to be separated by fixing the body and removing the engaging pin. 3. The method for manufacturing a manual instrument according to claim 1, wherein a cavity corresponding to the grip portion is formed in a pair of molds, and a fixing member is inserted into one of the molds. A method of manufacturing a manual instrument, wherein a hole forming part is provided, molten resin is injected into a cavity while a main body or a slide mold is supported, and the mold is opened after cooling and curing to open a manual instrument as a molded product. 4. The method of manufacturing a manual instrument according to claim 2, wherein a cavity corresponding to the grip portion is formed in a pair of molds, and an engagement pin as a fixing member is provided in an engagement hole of a main body. A method of manufacturing a manual instrument in which a manual instrument as a molded product is taken out by injecting a molten resin while being supported in a cavity while cooling and curing, and opening the mold after cooling and curing. 5. The method for manufacturing a manual instrument according to claim 2, wherein a cavity corresponding to the grip portion is formed in a pair of molds, and one of the molds has an engagement pin as a fixing member. The hole forming part for inserting the hole is provided, and the molten resin is injected while being supported in the cavity while the hole forming part is engaged with the engaging hole of the main body, and the mold is opened after cooling and curing. A method of manufacturing a manual instrument that takes out a manual instrument as a molded product.