JP3199133U - Model pin vise - Google Patents

Abstract

To provide a model pin vise having a long product life, capable of stably holding a rod-like body such as a drill, and capable of reliably rotating the rod-like body. A model pin vise 1 having a sandwiching portion 2 and a handle portion 3, wherein the sandwiching portion 2 includes a chuck 5 capable of sandwiching a rod-like body 50, and a cone for housing the chuck 5 in a hollow interior. A hood 6 having a shape, and an attachment member 7 for attaching the hood 6 to the tip 4. The hood 6 has a first threaded portion formed on a first inner peripheral surface, and the attachment member 7 has a first outer periphery. A second threaded portion is formed on the surface to be screwed with the first threaded portion, a third threaded portion is formed on the second inner peripheral surface, and the tip 4 is formed on the second outer peripheral surface. A cylindrical shape is formed in which a fourth screw portion that is screwed into the screw portion is formed, and the opening edge is covered with a contact member 12 that contacts the rear end surface of the chuck 5. [Selection] Figure 1

Description

  The present invention relates to a model pin vise having a clamping part that clamps a rod-shaped body for processing a model, and more particularly to a model pin vise provided with a contact member that comes into contact with a chuck accommodated in the clamping part.

Conventionally, in order to drill a small hole or screw a screw into a plastic or wood model, a clamping part where a tip tool such as a small diameter drill is clamped and a handle part to which this clamping part is attached The model pin vise has been used. More specifically, the drill is configured to be clamped by a chuck accommodated in the clamping unit, and this chuck has a plurality of claws so that it can be clamped when a base end of a drill or the like is inserted. This is a configuration in which
However, since it is necessary to use a size that matches the diameter of the tip tool, the chuck needs to be replaced with a tip tool with a different diameter. The work of attaching to the handle is necessary. Therefore, there has been a problem that the replacement work of the tip tool is complicated.
Next, when using the pin vise for a model, for example, press the drill against the model, and further turn the drill and the handle together while pressing the hand against the rear end of the handle. The method of drilling holes has been performed. This is because a pressing member that freely rotates around the central axis of the handle portion is attached to the rear end of the handle portion so as to efficiently realize the progress and rotation of the drill. . Such a rotation of the pressing member is realized, for example, by interposing one rolling element at the position of the central axis of the handle portion between the rear end of the handle portion and the pressing member.
However, in the arrangement of the rolling elements as described above, the pressing member is supported at one point, so that the rotation of the pressing member becomes unstable, and as a result, the progress and rotation of the drill can be performed reliably. There is also a problem that it is difficult to drill small holes accurately and smoothly.
In recent years, therefore, various researches and developments have been carried out for the purpose of reducing the trouble of replacement, and a device has already been disclosed for this purpose.

For example, Patent Document 1 discloses a device related to a pin vise with the name “pin vise”.
The device disclosed in Patent Document 1 includes a pin vice body having a blind hole into which a small-diameter rod-like body can be inserted along the axial direction from the tip, a chuck having a plurality of claws for grasping the rod-like body, and a pin vise The cap has a mounting portion that can be detachably attached to the outer peripheral surface of the tip of the main body, and a cap having an opening that penetrates the rod-shaped body but does not pass through the chuck, and the cap extends from the opening to the mounting portion. The chuck has a chuck accommodating portion formed so that the inner diameter gradually increases toward the opening, and the chuck accommodated with the tip of the claw facing the opening in the chuck accommodating portion faces the opening by attaching the cap to the pin vice body. And an elastic member for opening the nail.
In the pin vise having such a structure, as the chuck moves away from the opening portion toward the mounting portion of the cap, the chuck claws in the chuck housing portion can expand in the radial direction. Therefore, even if the rod-shaped body is replaced with one having a large diameter, it can be passed through the same chuck. Thus, the pin vice of the present invention eliminates the need for chuck replacement when exchanging the rod-shaped body with a different diameter. As a result, handling of the pin vice is facilitated and an inexpensive pin vise can be manufactured.

Utility Model Registration No. 3175099

However, in the device disclosed in Patent Document 1, since the tip of the screw portion directly contacts the rear end surface of the claw of the chuck, as the rotation of the screw portion is repeated, the tip of the screw portion and the rear end surface of the claw May be damaged and the product life may be shortened.
In addition, since the chuck is provided with an elastic member for opening the claw, there is a risk that the claw is subjected to the action of spreading in the radial direction and the screw portion is rotated in the reverse direction and the tip thereof is moved away from the opening. is there. That is, there is a possibility that the chuck cannot stably hold the rod-shaped body.
Furthermore, since the internal structure of the pressing member provided at the end of the pin vice body is unknown, the instability at the time of rotation of the pressing member as described above has been solved by the device disclosed in Patent Document 1. It can not be said.

  The present invention has been made in response to such a conventional situation, has a long product life, can stably hold a rod-like body such as a drill, and further reliably rotates the rod-like body. An object of the present invention is to provide a pin vise for a model that can be performed in a simple manner.

  In order to achieve the above object, a first device is a model pin vise comprising a clamping part for clamping a rod-like body and a handle part to which the clamping part is attached at the tip, and the clamping part clamps the rod-like body. And a conical hood that accommodates the chuck in a hollow interior so as to be movable along the central axis of the handle, and an annular mounting member that attaches the hood to the tip. An insertion hole into which the rod-like body is inserted is provided, a first screw portion is formed on the first inner peripheral surface at the opposite end of the insertion hole, and the mounting member is formed on the first outer peripheral surface. A second threaded portion that is screwed with the threaded portion is formed, a third threaded portion is formed on the second inner peripheral surface, the tip is provided with an opening edge into which a rod-shaped body is inserted, and A fourth screw portion is formed on the outer peripheral surface of the screw 2 to be screwed into the third screw portion. A cylindrical shape, the opening edge, characterized in that it is coated with the contact member in contact with the rear end surface of the chuck.

In the invention of such a structure, for example, a chuck provided with a plurality of claws arranged radially around the rod-shaped body when the rod-shaped body is sandwiched can be considered. In such a chuck, when the rear end face is pushed by being accommodated in the hood, if the plurality of claws hold the rod-like body, or the rear end face is not pushed, the plurality of claws are separated from the rod-like body. Thus, the holding of the rod-shaped body is released.
For example, the first, third, and sixth screw portions are female screws, and the second, fourth, and fifth screw portions are male screws, respectively.
Further, the abutting member includes, for example, an annular portion that is detachably fitted to the opening edge, and an abutting surface that is orthogonal to the annular portion and is parallel to the rear end surface of the chuck. .

In the device of the above structure, for example, the fourth screw portion at the tip is screwed with the third screw portion of the mounting member, and the contact member is fitted to the opening edge. Then, when the first screw portion of the hood in which the chuck is inserted is screwed into the second screw portion of the mounting member, the hood is connected to the tip. Then, when the rod-shaped body is inserted into the chuck through the hood insertion hole and the handle is rotated so that the opening edge advances in the direction of the hood insertion hole, the contact member comes into contact with the rear end surface of the chuck. The chuck is pushed. Therefore, the rod-shaped body is held by the chuck.
In this case, instead of the opening edge coming into contact with the rear end surface of the chuck, for example, the contact surface parallel to the rear end surface of the contact member comes into contact, so that the rear end surface is deformed by the contact of the opening edge or It is prevented from being damaged.
Further, when the handle is rotated in a direction in which the opening edge is separated from the insertion hole of the hood, the contact member is separated from the chuck, so that the holding of the rod-shaped body is released.

Further, the second device is the first device according to the first device, wherein the tip of the second outer peripheral surface is between the fourth screw portion and the opening edge, and the fifth screw portion is opposite to the fourth screw portion. And the contact member is formed with a sixth screw portion that is screwed into the fifth screw portion on the third inner peripheral surface.
In the invention of such a structure, in addition to the action of the first invention, after the contact member comes into contact with the rear end surface of the chuck, when the rotation of the handle portion is stopped, the opening edge becomes the contact member. Since the reaction of the chuck is received via the handle, the handle portion tends to move away from the rear end surface of the chuck. That is, it tries to rotate in the direction in which the fourth screw portion is loosened with respect to the third screw portion.
However, since the fifth screw portion is threaded in the direction opposite to the fourth screw portion, the fifth screw portion tries to rotate in the direction in which the fourth screw portion loosens with respect to the third screw portion. It tries to rotate in the direction in which the sixth screw portion is tightened with respect to the screw portion. By canceling both rotations, the handle portion is prevented from moving away from the rear end face of the chuck. That is, the contact member exerts an action of preventing the fourth screw portion from loosening with respect to the third screw portion.
In any of the above cases, the first screw portion is sufficiently tightened with respect to the second screw portion, and the state without looseness is maintained.

The third device is the first or second device, wherein when the chuck sandwiches the rod-shaped body, the chuck has a plurality of claws radially arranged around the rod-shaped body, and the plurality of claws are rod-shaped bodies. And an elastic member that urges the plurality of claws to be separated from each other, and each of the plurality of claws has a fine unevenness at a tightening portion that fastens the peripheral surface of the rod-shaped body. It is formed.
In addition, as a method of forming fine unevenness in the tightening portion, for example, roughening of the surface of the tightening portion, spraying process in which a molten metal powder is applied to the surface of the tightening portion, metal or the like An electrodeposition process for electrodepositing the surface of the tightening portion is conceivable.
In the device of the above structure, in addition to the action of the first or second device, the frictional force between the peripheral surface of the rod-shaped body and the tightening portion increases, so that when the rod-shaped body is tightened, the tightening portion is in the shape of a rod. Prevents sliding against the body. At the same time, depending on the composition of the powder, since the hardness of the surface of the tightening portion is improved and the wear resistance is exhibited, deformation and breakage of the tightening portion can be prevented over a long period of time.

A fourth device is characterized in that, in the third device, the fine unevenness is formed by diamond electrodeposition.
In the idea of such a structure, diamond particles are fixed to the surface of the tightening portion by electroplating. Therefore, when the tightening portion tightens the rod-shaped body, fine irregularities due to the diamond particles bite into the peripheral surface of the rod-shaped body, and the anti-slip action is strongly exerted between the peripheral surface and the tightening portion.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the handle is attached to the rear end with a pressing member that freely rotates about the central axis, and the rear end is on the central axis. And a bearing provided around the first locking portion. The bearing includes a plurality of bearings arranged at a desired angle around the central axis. A holding hole, and a rolling element that is rotatably held inside each of the plurality of holding holes. The pressing member has a handle that has one end supported by the bearing and is provided with a through hole, and the through hole. And a fixing member provided with a second locking portion that is locked to the first locking portion.
In the idea of such a structure, the first locking portion is, for example, a protruding body that protrudes outward on the central axis of the handle portion. The fixing member is, for example, a cylindrical body in which a second locking portion that is locked to the first locking portion is provided. Furthermore, the plurality of holding holes are arranged, for example, every 120 degrees around the central axis of the handle. Therefore, a total of three rolling elements are also equally arranged around the central axis of the handle.

In the device of the above structure, in addition to the action of any one of the first to fourth devices, the first locking portion is inserted into the through hole of the handle, and the fixing member is inserted into the through hole. The pressing member is attached to the rear end of the handle portion by locking the second locking portion to the first locking portion.
In this case, since one end of the pressing member is supported by a bearing including a plurality of rolling elements, the pressing member rotates freely about the central axis of the handle.
And since a some rolling element is equally arrange | positioned centering | focusing on the central axis of a handle | pattern part, it is prevented that rotation of a pressing member becomes unstable.

As described above, according to the first device, since the plurality of claws can be moved closer to or away from each other by rotating the handle portion, rods having different diameters can be formed with one type of chuck. Can be pinched.
In addition, since the opening edge is covered with the contact member, the rear end surface is prevented from being deformed or damaged, so that the product life of the model pin vice is reduced as compared with the case where the opening edge directly contacts the rear end surface. Can be prolonged. In addition, when the contact member is detachably fitted to the opening edge, only the contact member can be easily replaced, so that the product life of the model pin vice can be further prolonged.

  According to the second device, in addition to the effect of the first device, the third screw portion is prevented from loosening with respect to the fourth screw portion, so that it is possible to maintain the firm clamping of the rod-shaped body. it can.

According to the third device, in addition to the effects of the first or second device, the anti-slip action is exhibited between the tightening portion and the peripheral surface of the rod-like body. It is possible to efficiently transmit the rotation of the rod-shaped body.
In addition, since the deformation of the tightening portion is prevented over a long period of time, the durability of the chuck can be improved.

  According to the fourth device, in addition to the effect of the third device, the anti-slip action is exerted strongly between the rod-shaped body and the tightening portion. Can be securely clamped.

  According to the fifth device, in addition to the effects of any one of the first to fourth devices, the arrangement of the plurality of rolling elements prevents the rotation of the pressing member from being unstable. The rotation of the rod-like body during work can be precisely controlled via the handle.

(A) And (b) is the side view and disassembled perspective view of the pin vise for models which concern on embodiment of this invention, respectively. (A) is sectional drawing along the central axis of the pin vise for models which concerns on embodiment of this invention, (b) and (c) are perspective views of an attachment member and a contact member, respectively. (A) And (b) is the perspective view and front view of a chuck | zipper which comprise the pin vise for models which concerns on embodiment of this invention, respectively, (c) is a side view of the nail | claw which comprises a chuck | zipper. (A) is sectional drawing along the central axis of the handle | pattern part of the pressing member attached to the handle | pattern part which comprises the pin vise for models which concerns on embodiment of this invention, (b) is A in (a). FIG. (A) is sectional drawing along the central axis of the pin vise for models which concerns on the modification of a present Example, (b) is a perspective view of an abutting member.

An example of a pin vise for a model according to an embodiment of the present invention will be described in detail with reference to FIGS.
FIGS. 1A and 1B are a side view and an exploded perspective view, respectively, of a model pin vise according to an embodiment of the present invention.
As shown in FIG. 1 (a), a model pin vise 1 according to an embodiment of the present invention includes a sandwiching portion 2 for sandwiching a rod-like body 50, and a handle portion 3 to which the sandwiching portion 2 is attached to a tip 4. It is a pin vise for models.
As shown in FIG. 1B, the clamping unit 2 includes a chuck 5 that can clamp the rod-shaped body 50, and a cone that accommodates the chuck 5 in a hollow interior so as to be movable along the central axis X of the handle 3. A hood 6 having a shape and an annular attachment member 7 for attaching the hood 6 to the tip 4 are provided. The contact member 12 provided between the chuck 5 and the attachment member 7 and the pressing member 18 attached to the handle portion 3 will be described with reference to FIGS. 2 and 4, respectively.

Next, the attachment member and the contact member constituting the model pin vise according to the present embodiment will be described in detail with reference to FIG. 2A is a cross-sectional view taken along the central axis of the model pin vice according to the embodiment of the present invention, and FIGS. 2B and 2C are perspective views of the mounting member and the contact member, respectively. It is. In addition, about the component shown in FIG. 1, the same code | symbol is attached | subjected also in FIG. 2, and the description is abbreviate | omitted.
As shown in FIGS. 2 (a) and 2 (b), the hood 6 is provided with an insertion hole 6a into which the rod-like body 50 is inserted at the apex, and the first inner portion at the opposite end 6b of the insertion hole 6a. the first threaded portion S ₁ is formed on the peripheral surface 6c. The hood 6 is specifically made of an aluminum material with a nickel plating layer formed thereon. Further, the hood 6 may be formed of iron or steel that has been subjected to quenching in order to improve the strength.

The attachment member 7 is formed with a _second screw portion S2 which is screwed with the _first screw portion S1 on the first outer peripheral surface 7a, and a third screw portion S on the second inner peripheral surface 7b. ₃ is formed.
Tip 4 of the handle portion 3, together with the opening edge 4a is provided the rod-like body 50 is inserted, the fourth screw portion S ₄ screwed into the third screw part S ₃ in the second outer circumferential surface 4b is formed It has a cylindrical shape. The opening edge 4 a is covered with a contact member 12 that contacts the rear end surface 5 a of the chuck 5.
Further, the tip 4, while the fourth threaded portion S ₄ and the opening edge 4a of the second outer circumferential surface 4b, in a direction opposite to that of the fourth screw portion S ₄ is the fifth threaded portion S ₅ threaded Is done.

As shown in FIG. 2C, the contact member 12 includes an outer cylinder 13 having a flat contact surface 13 a and an inner cylinder 14 accommodated in the outer cylinder 13. threaded portion S ₆ of the sixth screwed to the threaded portion S ₅ of the fifth is formed on the third inner peripheral surface 14a. Further, the outer cylinder 13 and the inner cylinder 14 are fixed to each other on the joining surface 15 with an adhesive. The reason why the contact member 12 is configured by combining the outer tube 13 and the inner tube 14 as described above is that the contact member 12 can be manufactured more easily than when the contact member 12 is integrally formed from the beginning.
The first screw portion S ₁ , the third screw portion S _3, and the sixth screw portion S ₆ are all female screws, and the second screw portion S ₂ , the fourth screw portion S _4, threaded portion S ₅ of 5 is the male screw both.

Next, the configuration of the chuck will be described in detail with reference to FIG. 3A and 3B are a perspective view and a front view of the chuck constituting the model pin vise according to the embodiment of the present invention, respectively, and FIG. 3C is a side view of the claw constituting the chuck. FIG. 1 and 2 are denoted by the same reference numerals in FIG. 3 and description thereof is omitted.
As shown in FIGS. 3A and 3B, the chuck 5 radiates every 120 degrees around the rod-like body 50 when the rod-like body 50 (see FIGS. 1 and 2) is sandwiched. A plurality of claws 8 to 10 and an elastic member that connects the plurality of claws 8 to 10 so as to be openable and closable with respect to the rod-like body 50 and urges the plurality of claws 8 to 10 to be separated from each other. 11a to 11c. In the chuck 5, the elastic members 11 a to 11 c contract when the cusps 8 a to 10 a of the plurality of claws 8 to 10 are fitted into the insertion holes 6 a (see FIG. 2) of the hood 6. The claws 8 to 10 are close to each other, and the rod-like body 50 is sandwiched between the claws 8 to 10. The plurality of claws 8 to 10 are all made of the same material as that of the hood 6.
And as shown in FIG.3 (b) and FIG.3 (c), as for the nail | claw 8, the fine unevenness | corrugation (not shown) is formed in the clamping part 8b which clamps the surrounding surface of the rod-shaped body 50. As shown in FIG. Specifically, the fine irregularities are formed by diamond electrodeposition. The tightening portion 8b is formed in a planar shape. Further, the claw 8 is provided with a concave portion 8c to which the elastic member 11a is fixed symmetrically with the tightening portion 8b interposed therebetween. This configuration is the same for the claws 9 and 10, and the claws 9 and 10 are provided with tightening portions 9b and 10b and recesses 9c and 10c, respectively.

Next, the handle portion constituting the model pin vise will be described in detail with reference to FIG. Fig.4 (a) is sectional drawing along the central axis of the handle part of the pressing member attached to the handle part which comprises the pin vise for models which concerns on embodiment of this invention, FIG.4 (b) is a figure. It is the sectional view on the AA line in 4 (a). The constituent elements shown in FIGS. 1 to 3 are denoted by the same reference numerals in FIG. 4 and description thereof is omitted.
As shown in FIGS. 4A and 4B, the handle 3 is attached to the rear end 16 with a pressing member 18 that freely rotates about the central axis X.
The rear end 16 is formed with a first locking portion 16a provided on the central axis X and a bearing 17 provided around the first locking portion 16a.
The bearing 17 includes a plurality of holding holes 17a disposed every 120 degrees around the central axis X, and balls 17b held in the plurality of holding holes 17a so as to be capable of rolling.
The pressing member 18 has one end 19a supported by the bearing 17 and a handle 19 provided with a through hole 19b, and a second engagement fitted into the through hole 19b and locked to the first locking portion 16a. And a fixing member 20 provided with a stopper 20a. In more detail, the 1st latching | locking part 16a is a protrusion body which protrudes along the central axis X, and the uneven surface 16b is formed in the terminal. In addition, the second engaging portion 20a of the fixing member 20 has an uneven surface 20b that fits into the uneven surface 16b.

In order to use the model pin vise 1 having such a structure, first, as shown in FIG. 2, for example, the mounting member 7 is gripped unrotatably and the handle 3 is rotated in the α direction. 3 of a screw portion S ₃ is screwed and fourth screw portion S ₄ of the tip 4. Of course, the handle 3 may be gripped unrotatably and the attachment member 7 may be rotated in the β direction. Moreover, in any case, so that the relative fourth screw portion S ₄ is a third screw portion S ₃ is tightened.
If the screwing at this time is kept to such an extent that the mounting member 7 is positioned closer to the opening edge 4a, the contact surface 13a of the outer cylinder 13 is fixed when the hood 6 containing the chuck 5 is mounted on the mounting member 7. The chuck 5 is not in contact with the rear end surface 5a. That is, since the chuck 5 can be accommodated away from the insertion hole 6 a of the hood 6, the rod-like body 50 can be inserted between the plurality of claws 8 to 10.

Next, to cover the opening edge 4a of the gripped handle portion 3 at the contact member 12, since the threaded portion S ₅ of the fifth is threaded in a direction opposite to that of the fourth screw portion S _4, the above-mentioned Contrary to the case where the handle portion 3 is rotated in the α direction, the abutting member 12 is gripped unrotatably and the handle portion 3 is rotated in the β direction, or the handle portion 3 is gripped non-rotatably. In addition, it is necessary to rotate the contact member 12 in the α direction. By this kind of operation, it engaged sixth threadedly with the screw portion S ₆ that is formed on the third inner peripheral surface 14a of the inner cylinder 14 a screw portion S ₅ of the fifth tip 4.
Then, the mounting member 7 the hood 6 chuck 5 is inserted while gripping the non-rotatably is rotated to β direction, it is screwed a first threaded portion S ₁ to the second screw portion S ₂ When tightened, the chuck 5 is accommodated in the hood 6 so as to be movable in the F direction and the R direction along the central axis X, and the hood 6 is connected to the tip 4.
Subsequently, the rod-like body 50 is inserted between the plurality of claws 8 to 10 (see FIG. 3) of the chuck 5 through the insertion hole 6a of the hood 6, and the handle portion 3 so that the opening edge 4a advances in the F direction. Is rotated in the α direction, the abutment surface 13a of the outer cylinder 13 abuts on the rear end surface 5a and the claws 8 to 10 are pushed in the F direction, and the pointed heads 8a to 10a (see FIG. 3) serve as the hood 6. Is fitted into the insertion hole 6a. Therefore, the plurality of claws 8 to 10 come close to each other and the rod-like body 50 is strongly held between the claws 8 to 10.

Further, since the flat contact surface 13a contacts the rear end surface 5a, the pressure of the contact surface 13a against the rear end surface 5a is dispersed. Therefore, the rear end surface 5a is also prevented from being deformed or damaged by repeating the rotation of the handle 3.
On the other hand, when the handle 3 is rotated in the β direction so as to move backward in the R direction, the contact surface 13a is separated from the rear end surface 5a, so that the pinching of the rod-like body 50 by the plurality of claws 8 to 10 is released, The rod-shaped body 50 can be taken out.

However, when the rod-like body 50 is strongly held between the claws 8 to 10, if the rotation of the handle 3 in the α direction is stopped, the opening edge 4 a receives the reaction of the chuck 5 via the contact member 12. The handle part 3 tries to retreat in the R direction. That is, the fourth screw portion S ₄ attempts rotated in a direction (beta direction) loosening relative to the third screw part S _3. In addition, since this reaction is urged | biased by the direction which separates mutually the some nail | claws 8-10 by the elastic members 11a-11c, when chuck | zipper 5 tries to move away from the insertion hole 6a of the hood 6, It has been strengthened.
However, since the screw portion S ₅ of the fifth it is threaded in a direction opposite to that of the fourth screw portion S _4, although the fourth screw portion S ₄ is to rotate in the β direction, sixth screws part S ₆ tries to rotate in the α direction. By canceling both rotations, the handle 3 is prevented from moving in the R direction away from the rear end surface 5a of the chuck 5. That is, the fifth threaded portion S ₅ and the abutting member 12 of the action of the fourth screw portion S ₄ of locking for the third screw portion S ₃ is exhibited.
In the case of the first threaded portion S ₁ is sufficiently tightened to the second thread portion S _2, looseness-free state is maintained.

Subsequently, as shown in FIG. 3, in the claws 8 to 10 of the chuck 5, fine irregularities due to diamond particles fixed to the fastening portions 8 b to 10 b respectively bite into the peripheral surface of the rod-like body 50, Anti-slip action is exhibited between the surface and the tightening portions 8b to 10b.
Further, since the surface hardness of the tightening portions 8b to 10b is improved by diamond electro-deposition processing and has wear resistance, deformation and breakage of the tightening portions 8b to 10b can be prevented over a long period of time.

In addition, as shown in FIG. 4, in the pressing member 18, the first locking portion 16a of the rear end 16 is inserted into the through hole 19b of the handle 19, and the fixing member 20 is inserted into the through hole 19b. At the same time, the pressing member 18 is attached to the rear end 16 of the handle portion 3 by locking the uneven surface 20b of the second locking portion 20a to the uneven surface 16b of the first locking portion 16a.
In this case, since the one end 19a of the pressing member 18 is supported by the bearing 17 including the plurality of balls 17b, the pressing member 18 freely rotates about the central axis X of the handle portion 3. .
And since the some ball | bowl 17b is arrange | positioned equally centering on the central axis X, it is prevented that rotation of the pressing member 18 becomes unstable.

As described above, according to the model pin vice 1 according to the present embodiment, the rod-shaped body 50 having different diameters can be held by the one type of chuck 5 by a simple operation of rotating the handle 3. it can. Therefore, the labor for replacing the chuck 5 is saved, and the working efficiency is improved.
Further, since the opening edge 4a is covered with the contact member 12 and the pressure of the contact surface 13a against the rear end surface 5a is dispersed, the rear end surface 5a is prevented from being deformed or damaged. Compared with the case of the prior art in which the opening edge 4a directly abuts, the product life can be prolonged.
Furthermore, by the fifth screw portion S ₅ and the abutment member 12, since the effect of the fourth screw portion S ₄ of locking for the third screw portion S ₃ is exerted, rigid clamping of the rod-like body 50 Can be maintained. Therefore, it is possible to stably rotate the rod-like body 50 around the central axis X of the handle portion 3, and for example, it is possible to drill a small hole quickly and accurately in the model.

  And since the anti-slip | slipping effect | action is strongly exhibited between the fastening parts 8b-10b and the surrounding surface of the rod-shaped body 50 by diamond electrodeposition processing, rotation of the handle | pattern part 3 is turned to rotation of the rod-shaped body 50. Can be transmitted efficiently. Note that, as the diameter of the rod-shaped body 50 increases, the tightening portions 8b to 10b become slippery with respect to the rod-shaped body 50. Accordingly, the tightening portions 8b to 10b are subjected to diamond electrodeposition processing, thereby increasing the diameter. It is possible to securely hold the rod-shaped body 50. Moreover, if the tightening portions 8b to 10b of the chuck 5 have wear resistance, the durability of the chuck 5 can be improved. Further, since the tightening portions 8b to 10b are formed in a planar shape as shown in FIGS. 3B and 3C, for example, they are disclosed in FIG. As described above, the diameter of the bar-shaped body 50 that can be sandwiched is not limited as compared with the case where the end surface of the “nail 6” on the “opening 3c” side is formed in a slightly recessed curved surface, and cutting at the time of manufacture is not limited. Easy to process. That is, according to the tightening portions 8b to 10b of the chuck 5, it is possible to simultaneously exhibit the effect that it can exhibit high anti-slip properties and wear resistance and the effect that it can be cut at low cost.

In addition, since the rotation of the pressing member 18 is prevented from becoming unstable, the rotation of the rod-shaped body 50 at the time of work can be precisely controlled via the handle 3.
According to the pressing member 18, it is not necessary to provide a rolling element at a position corresponding to the central axis X. Therefore, the position corresponding to the central axis X is opened like the through hole 19 b of the handle 19. Can be adopted. On the other hand, as an example of the prior art, for example, when a rolling element is disposed only at a position corresponding to the central axis X, a cross section in the direction along the central axis X is used to hold the rolling element. A letter-shaped handle will be adopted. Such a configuration is more difficult to manufacture than a configuration in which the position corresponding to the central axis X is open. Therefore, the pressing member 18 can be manufactured more easily than the conventional technique, and the manufacturing cost can be reduced.

Further, a modification of the model pin vise 1 will be described in detail with reference to FIG. Fig.5 (a) is sectional drawing along the central axis of the pin vise for models which concerns on the modification of a present Example, FIG.5 (b) is a perspective view of a contact member. 1 to 4 are denoted by the same reference numerals in FIG. 5 and description thereof is omitted.
As shown in FIGS. 5A and 5B, the model pin vise 1a according to the modified example of the present embodiment has a handle portion 21 and a contact member instead of the handle portion 3 and the contact member 12, respectively. 22 is provided. Among these, the handle portion 21 is provided continuously until the fifth screw portion S ₅ (see FIG. 2) in the handle portion 3 is not formed and the fourth screw portion S ₄ reaches the opening edge 4a. .
The contact member 22 includes a cylindrical portion 23 that is detachably inserted into the inside of the tip 4 from the opening edge 4 a and a flange portion 24 that is formed at one end of the cylindrical portion 23. The tubular portion 23 is not formed with the sixth screw portion S ₆ (see FIG. 2) of the contact member 12, and both the outer side 23a and the inner side 23b are smooth. The flange portion 24 is provided with a flat contact surface 24a that contacts the rear end surface 5a. Other configurations of the model pin vise 1a are the same as those of the model pin vise 1 according to the first embodiment.

In the model pin vise 1a having such a structure, although the action of preventing the _fourth screw portion S4 from loosening with respect to the _third screw portion S3 is not exhibited, the contact member 22 is the contact member according to the first embodiment. The structure is simpler than 12. Therefore, since the contact member 22 can be sold as a replacement member that is less expensive than the contact member 12, the product life of the model pin vise 1a can be further extended by frequently replacing the contact member 22. It can be made. Other functions and effects of the model pin vise 1a are the same as those of the model pin vise 1 according to the first embodiment.

  The model pin vise 1, 1a of the present invention is not limited to the structure shown in this embodiment. For example, the contact member 12 of the model pin vice 1 according to the embodiment may be integrally formed from the beginning instead of the outer tube 13 and the inner tube 14 being fixed. Further, in the model pin vise 1a according to the modification, a thread portion may be formed on the inner peripheral surface near the opening edge 4a and the outer peripheral surface of the contact member 22 so as to be screwed together. Further, the anti-slip action of the tightening portions 8b to 10b may be imparted by performing a process other than diamond electrodeposition, such as thermal spraying of ceramic or metal, or thermal spraying of a composite material of ceramic and metal. Alternatively, it may be provided by forming minute irregularities or grooves on the surfaces of the tightening portions 8b to 10b by knurling or the like. In addition, the chuck 5 may be composed of two or three or more claws.

  The present invention can be applied as a pin vise for a model having a clamping part for clamping a rod-like body for processing a model, and also as a driver for tightening a small screw constituting a hinge of a spectacle or a precision instrument. Is possible.

DESCRIPTION OF SYMBOLS 1,1a ... Pin vise for models 2 ... Holding part 3 ... Handle part 4 ... Tip 4a ... Opening edge 4b ... Second outer peripheral surface 5 ... Chuck 5a ... Rear end face 6 ... Hood 6a ... Insertion hole 6b ... Opposite end 6c ... First DESCRIPTION OF SYMBOLS 1 Inner peripheral surface 7 ... Mounting member 7a ... 1st outer peripheral surface 7b ... 2nd inner peripheral surface 8-10 ... Claw 8a-10a ... Pointed head 8b-10b ... Fastening part 8c-10c ... Recessed part 11a- 11c ... Elastic member 12 ... Contact member 13 ... Outer tube 13a ... Contact surface 14 ... Inner tube 14a ... Third inner peripheral surface 15 ... Joining surface 16 ... Rear end 16a ... First locking portion 16b ... Uneven surface DESCRIPTION OF SYMBOLS 17 ... Bearing 17a ... Holding hole 17b ... Ball 18 ... Pushing member 19 ... Handle 19a ... One end 19b ... Through-hole 20 ... Fixing member 20a ... 2nd latching | locking part 20b ... Uneven surface 21 ... Handle part 22 ... Contact member 23 ... Cylindrical part 23a ... Outside 23b ... Inside 24 ... F Nji portion 24a ... contact surface 50 ... rod-like member S 1 _... first screw portion S 2 _... second screw portion S 3 _... third screw portion S 4 _... fourth screw portion S 5 _... fifth screw Part S ₆ ... Sixth screw part

Claims (5)

A pin vise for a model comprising: a sandwiching part that sandwiches the rod-shaped body; and a handle part to which the sandwiching part is attached at the tip,
The clamping portion includes a chuck capable of clamping the rod-shaped body, a conical hood that accommodates the chuck in a hollow interior so as to be movable along the central axis of the handle, and an annular shape that attaches the hood to the tip. An attachment member,
The hood is provided with an insertion hole into which the rod-like body is inserted at the apex, and a first screw portion is formed on the first inner peripheral surface at the opposite end of the insertion hole,
The mounting member is formed with a second screw portion that is screwed with the first screw portion on a first outer peripheral surface, and a third screw portion is formed on a second inner peripheral surface,
The tip is provided with an opening edge into which the rod-like body is inserted, and has a cylindrical shape in which a fourth screw portion that is screwed to the third screw portion is formed on the second outer peripheral surface,
The model pin vise characterized in that the opening edge is covered with a contact member that contacts the rear end surface of the chuck. The tip is threaded with a fifth screw portion in a direction opposite to the fourth screw portion between the fourth screw portion and the opening edge of the second outer peripheral surface,
The model pin vise according to claim 1, wherein the contact member is formed with a sixth screw portion that is screwed onto the fifth screw portion on a third inner peripheral surface. The chuck, when sandwiching the rod-shaped body, connects a plurality of claws radially arranged around the rod-shaped body, and the plurality of claws so as to be openable and closable with respect to the rod-shaped body. An elastic member that urges the claws in a direction to separate them from each other,
3. The model pin vise according to claim 1, wherein the plurality of claws have fine irregularities formed in a tightening portion that fastens a peripheral surface of the rod-shaped body.   4. The model pin vise according to claim 3, wherein the fine irregularities are formed by diamond electrodeposition. The handle is attached to the rear end thereof with a pressing member that freely rotates around the central axis.
The rear end is formed with a first locking portion provided on the central axis, and a bearing provided around the first locking portion,
The bearing includes a plurality of holding holes arranged at desired angles with the central axis as a center, and rolling elements that are held so as to be able to roll inside the holding holes, respectively.
The pressing member includes a handle that is supported at one end by the bearing and provided with a through hole, and a second locking portion that is fitted into the through hole and locked to the first locking portion. The model pin vise according to claim 1, comprising a fixing member provided.

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