WO2014097494A1

WO2014097494A1 - Opening/closing tool

Info

Publication number: WO2014097494A1
Application number: PCT/JP2012/083627
Authority: WO
Inventors: 正實梨本
Original assignee: ナシモト工業株式会社
Priority date: 2012-12-18
Filing date: 2012-12-26
Publication date: 2014-06-26
Also published as: JP2014117780A

Abstract

The purpose of the present invention is to provide an opening/closing tool capable of grasping an object without crushing, breaking or scratching same even if the worker grasps the opening/closing actuator section roughly and with force. An opening/closing tool configured so that: a contact section (6) is provided on a first half (1) or a second half (2) and the other is provided with a movable contact section (7) that approaches and contacts said contact section (6); a movability-causing section (8) is provided part way towards the base end of the first half (1) or the second half (2); and when an object (4) is grasped by the opening/closing work section (3) and a closing force is applied on the opening-closing actuator section (5), the base end of the first half (1) or the second half (2) is deformed by the movability-causing section (8), the movable contact section (7) moves towards the contact section (6) as a result of said deformation, and the movable contact section (7) contacts the contact section (6) as a result of said mobility.

Description

Opening / closing tool

The present invention relates to an opening / closing operation tool for transmitting a closing force applied to an opening / closing operation unit to the opening / closing operation unit so that an object is sandwiched, cut or expanded by the opening / closing operation unit.

Conventional opening / closing work tools such as pliers, nippers, and snap ring pliers, for example, change the gripping force for the operator to grip the opening / closing operation part to a large clamping force, cutting force or expanding force by lever principle. It is transmitted to the opening / closing operation part to clamp, cut or expand the object, and the greater the closing force applied to the opening / closing operation part, the larger the holding force, cutting force or expansion force in the opening / closing operation part. It is configured to demonstrate.

For this reason, this kind of opening / closing work tool has a rigidity strength of the entire opening / closing work tool so that the closing force applied by the operator to the opening / closing operation part can be efficiently transmitted to the opening / closing work part that opens / closes on the distal end side of the opening / closing work tool. What is raised is common.

However, in the conventional opening / closing work tool mainly for ensuring the rigidity and strength, an unnecessary clamping force, cutting force or spreading force is easily applied to the opening / closing operation part that opens and closes. When sandwiching or expanding objects with delicate structures such as those that are easily broken or those that are easily scratched, the closing force applied to the opening / closing operation section may be slightly increased or reduced by mistake. In many cases, the object is crushed and damaged or the surface is scratched by the opening / closing operation part.

Therefore, in order to avoid crushing, damaging, or scratching the target object, the operator concentrates the nerves on the fingertips and fingers and applies a delicate force to the opening / closing operation part to apply a closing force with a delicate force. Therefore, the operation while adjusting the delicate force adjustment of the opening / closing operation unit is very difficult and causes a significant reduction in work efficiency.

In view of such a current situation, the present invention has advanced product development through trial and error based on the idea that it is desired to sandwich or expand an object having a delicate structure without crushing or breaking the surface or scratching the surface. The object that was completed at the end, for example, the object can be crushed or damaged by an extremely simple operation such as an operator simply gripping or picking the opening / closing operation part with a fingertip. Can be sandwiched or expanded without scratching, can easily cut objects that require delicate cutting (to avoid crushing or damaging them), or only the part of the object that you want to cut (for example, Providing an epoch-making opening / closing tool that makes it possible to easily design and implement an opening / closing tool that can cut only the soft part of the outer material) Than is.

The gist of the present invention will be described with reference to the accompanying drawings.

Opening and closing operation in which the first half 1 and the second half 2 are pivotally attached, and the front end side portions of the first half 1 and the second half 2 facing each other are sandwiched, cut or expanded. The opening / closing operation unit 3 is closed or opened by applying a closing force that presses the proximal side of the opposed first half 1 and second half 2 inward in the closing direction. Then, in the opening / closing operation tool which is the opening / closing operation unit 5 for pinching, cutting or expanding the object 4, a contact portion 6 is provided on one of the first half 1 and the second half 2, and the other A movable abutting portion 7 is provided to come in contact with the abutting portion 6 relatively close to the abutting portion 6, and a movable factor portion 8 is provided in the middle of the base end side portion of the first half 1 or the second half 2. The opening / closing operation unit in a state where the object 4 is held by the opening / closing operation unit 3 or in a state where the opening / closing operation unit 3 is in contact with the object 4 When a closing force is applied to the first half 1 or the second half 2 due to the movable factor 8, the movable abutting portion 7 is deformed by the deformation. 6 so that the movable contact portion 7 comes into contact with the contact portion 6 by the movement, and the movable contact portion 7 is deformed by the deformation. The deformation stops when it moves and comes close to the contact portion 6, and is further applied to the opening / closing operation portion 5 with the movable contact portion 7 coming into contact with the contact portion 6 and stopped. Even if the closing force is increased, the first half 1 or the second half 2 is not further deformed by the movable factor 8, and this is further increased and added to the opening / closing operation unit 5. The opening / closing operation tool is characterized in that the closing force is not transmitted to the opening / closing operation unit 3. A.

Further, the first half 1 and the second half 2 are pivotally attached, and the front end sides of the first half 1 and the second half 2 facing each other are used as a sandwiching portion, a cutting portion, or an expanding portion. The opening / closing operation unit 3 is closed by applying a closing force that presses the proximal end sides of the opposed first half 1 and second half 2 inward in the closing direction. Alternatively, in an opening / closing operation tool that is opened and closed and cut or widens the object 4, the fixed contact portion 6 is provided on one of the first half 1 and the second half 2, On the other side, a movable factor portion 8 and a movable abutting portion 7 movable by the movable factor portion 8 are provided, and the movable abutting portion 7 is in a state where the object 4 is sandwiched by the opening / closing operation unit 3 or the opening / closing operation. When a closing force is applied to the opening / closing operation unit 5 while the working unit 3 is in contact with the object 4, the movable factor unit 8 performs this operation. The first half 1 or the second half 2 provided with the movable contact portion 7 is deformed, and is movable so as to approach the fixed contact portion 6 by this deformation, and the fixed by the movement by this deformation. Even if the closing force applied to the opening / closing operation unit 5 is further increased while the movable contact portion 7 is in contact with the fixed contact portion 6, the contact force is increased further. As long as the closing force applied to the opening / closing operation unit 5 is not transmitted to the opening / closing operation unit 3, the opening / closing operation unit 5 is further provided as long as the movable contact unit 7 is in contact with the fixed contact unit 6. Even when a closing force is applied, the opening / closing operation unit 3 holds the holding force for holding the object 4, the cutting force for cutting the object 4, or the expanding force for expanding the object 4 in a constant state. The present invention relates to an opening / closing work tool that is configured as described above.

Further, the first half 1 and the second half 2 are pivotally attached, and the front end sides of the first half 1 and the second half 2 facing each other are used as a sandwiching portion, a cutting portion, or an expanding portion. The opening / closing operation unit 3 is closed by applying a closing force that presses the proximal end sides of the opposed first half 1 and second half 2 inward in the closing direction. Alternatively, in an opening / closing operation tool that is opened and closed and cut or widens the object 4, the fixed contact portion 6 is provided on one of the first half 1 and the second half 2, On the other side, a movable factor portion 8 and a movable abutting portion 7 movable by the movable factor portion 8 are provided, and the movable abutting portion 7 is in a state where the object 4 is sandwiched by the opening / closing operation unit 3 or the opening / closing operation. When a closing force is applied to the opening / closing operation unit 5 while the working unit 3 is in contact with the object 4, the movable factor unit 8 performs this operation. The first half 1 or the second half 2 provided with the movable contact portion 7 is deformed, and is movable so as to approach the fixed contact portion 6 by this deformation, and the fixed by the movement by this deformation. The fixed contact portion 6 or the movable contact portion 7 is formed so as to protrude inward as the closing direction of the opening / closing operation portion 5, and the opening / closing When the diameter, thickness, or shape of the object 4 to be pinched, cut, or expanded by the working unit 3 changes, the contact position of the movable contact part 7 with respect to the fixed contact part 6 or the movable contact part 7 The contact position of the fixed contact portion 6 with respect to the position is changed so that the object 4 is clamped by the opening / closing operation portion 3 or the opening / closing operation portion 3 is brought into contact with the object 4. Applying a closing force to the opening / closing operation unit 5 Then, the deformation caused by the movable factor 8 moves so that the movable abutting portion 7 approaches the fixed abutting portion 6 and abuts against the fixed abutting portion 6. Even if the closing force applied to the opening / closing operation unit 5 is further increased in a state where the movable contact portion 7 is in contact with the contact portion 6, the increased closing force is applied to the clamping force, cutting force, or expansion force. A configuration in which the opening force is not transmitted to the opening / closing work unit 3 or a transmission ratio in which the closing force further increased is transmitted to the opening / closing work unit 3 as a clamping force, a cutting force, or an expanding force is the fixed application. The present invention relates to an opening / closing tool characterized in that it is configured to be reduced as compared with a transmission ratio before the movable contact portion 7 comes into contact with the contact portion 6.

Further, the first half 1 and the second half 2 are pivotally attached, and the front end sides of the first half 1 and the second half 2 facing each other are used as a sandwiching portion, a cutting portion, or an expanding portion. The opening / closing operation unit 3 is closed by applying a closing force that presses the proximal end sides of the opposed first half 1 and second half 2 inward in the closing direction. Alternatively, in an opening / closing operation tool that is opened and closed and cut or widens the object 4, the fixed contact portion 6 is provided on one of the first half 1 and the second half 2, On the other side, a movable factor 8 and a movable abutting part 7 movable by the movable factor 8 are provided. The fixed abutting part 6 has a convex part 6 a or a concave part 6 a on a surface facing the movable abutting part 7. The movable abutting portion 7 is provided with a convex portion 6 a provided on the fixed abutting portion 6 on a surface facing the fixed abutting portion 6. In other words, the concave portion 7a or the convex portion 7a to be fitted to the concave portion 6a is provided, and the state in which the object 4 is held by the opening / closing operation portion 3 or the opening / closing operation portion 3 is attached to the object 4. When a closing force is applied to the opening / closing operation part 5 in the contacted state, the first half 1 or the second half 2 provided with the movable contact part 7 is deformed by the movable factor 8, and this deformation Is configured to move toward the fixed abutting portion 6 and to be brought into contact with the fixed abutting portion 6 by movement due to this deformation, and the opening / closing operation portion 3 holds the object 4 therebetween. Alternatively, when a closing force is applied to the opening / closing operation unit 5 in a state where the opening / closing operation unit 3 is in contact with the object 4, the deformation caused by the movable factor unit 8 causes the fixed contact unit 6 to move. Movable so that the movable contact portion 7 approaches The convex portion 6a provided on the fixed contact portion 6 and the concave portion 7a provided on the movable contact portion 7 or the concave portion 6a provided on the fixed contact portion 6 and the movable contact portion 7 are provided. The convex portion 7a is fitted and the fixed contact portion 6 and the movable contact portion 7 are fitted and locked, and the movable contact portion 7 is fitted and locked to the fixed contact portion 6. In this state, even if the closing force applied to the opening / closing operation unit 5 is further increased, the further increased closing force is not transmitted to the opening / closing operation unit 3 as a clamping force, a cutting force, or an expanding force, or The transmission ratio at which this further increased closing force is transmitted to the opening / closing operation unit 3 as a clamping force, cutting force or expansion force is such that the movable contact portion 7 is fitted to the fixed contact portion 6. It is related to an opening / closing work tool characterized in that it is configured to be reduced compared to the transmission ratio before stopping. The

Further, the movable factor 8 is closed in the middle of the proximal end portion of the first half 1 or the second half 2 provided with the movable contact portion 7 and the opening / closing operation portion 5 is closed. The opening / closing operation tool according to any one of claims 2 to 4, wherein the opening / closing tool is provided on a distal end side with respect to a force point portion 9 to which a closing force is applied.

Further, the fixed contact portion 6 or the movable contact portion 7 is formed in a shape protruding inwardly in the closing direction of the opening / closing operation portion 5 and the movable contact portion of the fixed contact portion 6 is formed. The shape of the contact surface with which the contact portion 7 abuts or the contact surface with which the movable contact portion 7 contacts the fixed contact portion 6 is formed in an arc shape and is clamped, cut or expanded by the opening / closing operation portion 3. When the diameter, thickness, or shape of the object 4 to be changed changes, the contact position of the movable contact portion 7 with respect to the fixed contact portion 6 or the contact position of the fixed contact portion 6 with respect to the movable contact portion 7 The structure according to any one of claims 2 to 4, wherein the position varies, but the deformation amount of the deformation of the first half 1 or the second half 2 caused by the movable factor 8 is not changed. This relates to the opening / closing work tool described in item 1.

Further, the fixed contact portion 6 or the movable contact portion 7 is formed in a shape protruding inwardly in the closing direction of the opening / closing operation portion 5 and the movable contact portion of the fixed contact portion 6 is formed. The shape of the contact surface with which the contact portion 7 abuts or the contact surface with which the movable contact portion 7 contacts the fixed contact portion 6 is formed in an arc shape and is clamped, cut or expanded by the opening / closing operation portion 3. When the diameter, thickness, or shape of the object 4 to be changed changes, the contact position of the movable contact portion 7 with respect to the fixed contact portion 6 or the contact position of the fixed contact portion 6 with respect to the movable contact portion 7 6. The opening / closing operation according to claim 5, wherein the position is changed, but the deformation amount of the deformation of the first half 1 or the second half 2 caused by the movable factor 8 is not changed. It relates to ingredients.

Since the present invention is configured as described above, the object can be sandwiched or expanded with a constant clamping force or spreading force, or the clamping force or cutting force or spreading force exceeding a predetermined value can be very easily achieved. Since it is possible to prevent the opening force from being applied to the object, for example, when an object having a delicate structure such as an object that is easily crushed, an object that is easily broken, or an object that is easily scratched is sandwiched or expanded. However, the operator must apply a closing force to the opening / closing operation part to avoid crushing, damaging or scratching the object sandwiched or expanded by the opening / closing operation part. There is no need to perform the cumbersome work of applying closing force to the opening / closing operation part while concentrating nerves and applying closing force with delicate force on the opening / closing operation part. Force or finger Even if the closing force is applied to the open / close operation part with a simple operation such as a gripping operation or a fingertip picking operation that does not require fine adjustment of the picking force, the object is crushed. Or a breakthrough opening / closing work tool that continues to be sandwiched or expanded by the opening / closing work part without damaging or scratching, or a cutting force exceeding a predetermined value is not exhibited, An innovative opening / closing work tool that can cut only a desired portion that can be cut with this cutting force, cannot cut a portion that cannot be cut without a cutting force larger than this, and can reliably cut only the desired portion It becomes an epoch-making opening and closing work tool excellent in practicality that can be done.

In the second, third, fourth, and fifth aspects of the invention, the movable contact portion moved by the movable factor portion contacts the contact portion, and the movable contact portion contacts the contact portion. Even if the closing force is increased and applied to the opening / closing operation unit, the closing force applied to the opening / closing operation unit is not transmitted to the opening / closing operation unit, and the opening / closing operation unit has a constant clamping force, cutting force, or expansion force. This is an epoch-making opening / closing work tool that makes it possible to easily design the structure to be held.

In the inventions according to

claims

6 and 7, even if the diameter, thickness or shape of the object to be clamped or cut or expanded by the opening / closing operation portion changes, the clamping force or cutting force or expansion force acting on the object is changed. Since the maximum value of the opening force does not change, regardless of the diameter, thickness, or shape of the object to be clamped, cut or expanded in the opening / closing operation part, the object is always clamped with a constant clamping force or with a constant cutting force. Can be cut or expanded with a certain expansion force, for example, the clamping force that prevents the object from being crushed, damaged, or scratched at the maximum value that this opening / closing operation part can exert Alternatively, by setting an expansion force or a cutting force that cannot cut any part other than the desired location, delicate operations can be performed when holding or cutting or expanding various delicate objects with different diameters, thicknesses, or shapes. The a breakthrough closing the implement having excellent practicability which can be easily pinched or cut or expanded without.

1 is a perspective view showing Example 1. FIG. FIG. 3 is an explanatory front view illustrating a usage state of the first embodiment. FIG. 6 is an explanatory front view showing a use state (operation of main parts) of the first embodiment. It is explanatory drawing which shows the movable factor part of Example 2. FIG. It is explanatory drawing which shows another example of the movable factor part of Example 2. FIG. 10 is a front view showing Example 3. FIG. FIG. 6 is a front view showing a use state of Example 3. It is explanatory drawing which shows operation | movement of the movable contact part of Example 3. FIG. FIG. 10 is an explanatory front view showing a use state of Example 4. FIG. 10 is an explanatory front view showing a use state (operation of main parts) of Example 4. It is explanatory drawing which shows operation | movement of the movable contact part of Example 4. 10 is a front view showing Example 5. FIG. FIG. 10 is an explanatory front view showing a use state (operation of main parts) of Example 5.

Embodiments of the present invention that are considered suitable will be briefly described with reference to the drawings, illustrating the operation of the present invention.

For example, when the present invention is configured as an opening / closing work tool for sandwiching the object 4, the opening / closing work part that serves as a sandwiching part between the front end sides of the first half 1 and the second half 2 that face each other. When the object 4 is arranged in 3 and a closing force that presses inward in the closing direction is applied to the proximal end side of the first half 1 and the second half 2 facing each other, that is, the opening / closing operation portion 5. The opening / closing operation unit 3 can be closed and the object 4 can be clamped with the pivoting portion 10 pivoting the first half 1 and the second half 2 as a fulcrum.

Further, the present invention is movable when the opening / closing operation unit 3 serving as a clamping unit sandwiches the object 4 and increases the closing force that presses the opening / closing operation unit 5 inward in the closing direction. The first half 1 or the second half 2 is deformed by the factor 8, and the movable abutment 7 is moved closer to the abutment 6 by the deformation caused by the movable factor 8.

In the present invention, the movable factor 8 is configured to be elastically deformed by an elastic body, or is configured to open and close with a shaft or a bent portion as a fulcrum, such as a hinge, or A configuration in which one end side is fixed and the fixed portion is used as a starting point to bend and deform or bendable and movable, and the first half 1 or the second half 2 is deformed by the movable factor 8 is the opening / closing operation portion 5. This means that the entire shape of the first half 1 or the second half 2 is deformed by the movable factor 8 being deformed or moved by the closing force applied to the first half.

Further, as the movable contact portion 7 moves, the closing force applied to the opening / closing operation portion 5 is transmitted to the opening / closing operation portion 3, and the holding force for the opening / closing operation portion 3 to hold the object 4 is used for this opening / closing operation. It increases as the closing force applied to the part 5 increases.

Even after the movable contact portion 7 is moved so as to approach the contact portion 6, if the closing force is further applied to the opening / closing operation portion 5, the deformation by the movable factor portion 8 further proceeds. Thus, the movable contact portion 7 further approaches the contact portion 6 and comes into contact with the contact portion 6. When the movable contact portion 7 comes into contact with the contact portion 6, the movable factor portion 8 The resulting deformation stops.

In addition, the holding force by which the opening / closing operation unit 3 holds the object 4 during the period from when the movable contact portion 7 moves in the direction approaching the contact portion 6 to the contact portion 6 is determined by the opening / closing operation. Although it continues to increase as the closing force applied to the portion 5 increases, when the movable contact portion 7 contacts the contact portion 6, the increase in the clamping force with which the opening / closing operation portion 3 clamps the object 4 stops.

In addition, even when the closing force applied to the opening / closing operation unit 5 is further increased in a state where the contact portion 6 and the movable contact portion 7 are in contact, the deformation caused by the movable factor portion 8 does not proceed. The deformed state when the movable abutting portion 7 abuts on the portion 6 is maintained, and the deformation caused by the movable factor portion 8 does not advance, so that the movable abutting portion 7 does not move, and the movable abutting portion 7 By not moving, the closing force that is further increased and applied to the opening / closing operation unit 5 is not transmitted to the opening / closing operation unit 3, and the holding force for holding the object 4 by the opening / closing operation unit 3 is maintained at a constant holding force. .

That is, according to the present invention, this constant holding force becomes the maximum holding force, and the object 4 is not clamped by the clamping force higher than this, so for example, the object 4 clamped by the opening / closing operation unit 3 is crushed. The movable contact portion 7 that is movable by the movable factor portion 8 is brought into contact with the contact portion 6 before the opening / closing operation portion 3 exerts a clamping force that causes damage, breakage, or scratches. By doing so, even if too much closing force is applied to the opening / closing operation part 5, it can be configured not to exert a clamping force that crushes, breaks, or scratches the object 4. As a result, the above-described problem that the object 4 is crushed, broken or scratched by applying too much closing force to the opening / closing operation unit 5 does not occur.

Therefore, the operator applies a closing force to the opening / closing operation unit 5 so that the object 4 held by the opening / closing operation unit 3 is not crushed, damaged, or scratched. There is no need to perform the cumbersome work of applying a closing force to the opening / closing operation unit 5 while performing a delicate and fine operation that concentrates the nerve and applies a closing force to the opening / closing operation unit 5 with a delicate force. Delicate that can be easily broken or scratched with extremely simple operations such as gripping and fingertip operation that can be manipulated without any need for delicate adjustments to the gripping force or the gripping force of the fingertip. It is an epoch-making opening / closing work tool that can easily hold the object 4 and is extremely practical and easy to operate.

In addition, the present invention can be used for various applications by taking advantage of such characteristics, and can further realize a configuration that exhibits such innovative effects with a simple configuration. It becomes a typical opening and closing work tool.

Specific embodiment 1 of the present invention will be described with reference to FIGS.

In this embodiment, the first half 1 and the second half 2 are pivotally attached, and the front end side portions of the first half 1 and the second half 2 facing each other are sandwiched between the objects 4. The opening / closing operation part 3 as a holding part is applied, and the opening / closing operation part 3 is applied by applying a closing force that presses the proximal end sides of the first half 1 and the second half 2 facing each other inward. When the opening / closing operation tool 5 is closed and sandwiches the object 4, the opening / closing operation tool 5 applies a closing force to the opening / closing operation part 5 while the object 4 is sandwiched by the opening / closing operation part 3. When the closing force applied to the opening / closing operation unit 5 reaches a predetermined closing force, the closing force applied to the opening / closing operation unit 5 is not transmitted to the opening / closing operation unit 3 as a holding force, and the holding force is constant. The object 4 is configured to continue to be sandwiched.

Specifically, the first half 1 is provided with an abutting portion 6, the second half 2 is provided with a movable abutting portion 7 that comes in contact with the abutting portion 6 relatively closely, and further this When the movable factor 8 is provided in the middle part of the base end side portion of the half body 2 and the closing force is applied to the opening / closing operation unit 5 with the object 4 held between the opening / closing operation unit 3, the movable factor The base end side portion of the second half 2 is deformed by the portion 8, and the movable contact portion 7 is moved relatively close to the contact portion 6 by this deformation, and is movable by this movement. The abutting portion 7 is configured to abut against the abutting portion 6, and when the movable abutting portion 7 is moved by the deformation and comes close to the abutting portion 6, the deformation stops, Even if the closing force applied to the opening / closing operation unit 5 is further increased in a state where the movable contact portion 7 is brought into contact with the contact portion 6 and stopped, the second half 2 is further deformed by the movable factor portion 8. Configured to no closing force obtained by adding to the opening and closing operation unit 5 The further increase in is configured so as not transmitted to the opening and closing operations unit 3.

More specifically, the first half 1 and the second half 2 have a configuration in which a metal member or a synthetic resin member is formed in a predetermined shape (in this embodiment, a metal member, specifically an aluminum alloy or stainless steel). And each tip side is configured to have a shape that can hold the object 4, and the base end side is configured to be a shape that can be gripped or operated by fingertips, and each tip side The first half on the tip side of the pivoting portion 10 that pivotally attaches the first half 1 and the second half 2 by cross-polymerizing and pivoting at the boundary position between the base portion and the base end side portion The first and second halves 1 and 2 are located on the base end side of the pivoting portion 10 with the portion where the tip side portions of the first and second halves 2 face each other as a clamping portion. A portion where each base end side portion with the body 2 is disposed to face each other is used as an opening / closing operation unit 5, and the opening / closing operation unit 5 is gripped or operated with a fingertip, The first half 1 and the second half 2 are pivoted by applying a closing force to the opening / closing operation part 5 inwardly in the closing direction (so that the facing distance of the opening / closing operation part 5 is narrowed). 10 is pivoted about the fulcrum and the opening / closing operation unit 3 is closed, and the closing force applied to the opening / closing operation unit 5 is transmitted to the opening / closing operation unit 3 as a clamping force, and the object 4 is applied to the opening / closing operation unit 5. In detail, when the object 4 is sandwiched between the opening / closing operation unit 3 and the opening / closing operation unit 5 is applied while increasing the closing force, the opening / closing operation is performed. The closing force applied to the operation unit 5 while being increased is transmitted to the opening / closing operation unit 3, and the opening / closing operation unit 3 is configured to hold the object 4 with a holding force according to the closing force applied to the opening / closing operation unit 5, In addition, with the object 4 sandwiched between the opening / closing operation unit 3, the opening / closing operation unit 5 is applied while increasing the closing force. Thus, the proximal end side portion of the second half 2 is deformed by the movable factor 8, and the movable contact portion 7 is moved relatively closer to the contact portion 6 by this deformation, and The movable contact portion 7 is configured to come into contact with the contact portion 6 by this movement, and when the movable contact portion 7 is moved by the deformation and comes close to the contact portion 6, the deformation stops. Even if the closing force applied to the opening / closing operation unit 5 is further increased while the movable contact portion 7 is in contact with the contact portion 6 and stopped, the second half 2 is further deformed by the movable factor portion 8. The closing force applied to the opening / closing operation unit 5 is further not transmitted to the opening / closing operation unit 3, and the opening / closing operation unit 3 is at the time when the movable contact unit 7 contacts the contact unit 6. The object 4 is configured to continue to be clamped by the clamping force.

Hereinafter, each component of the present embodiment will be described in more detail.

The front end side portions of the first half 1 and the second half 2 constituting the opening / closing operation unit 3 of the present embodiment are tapered, and the inner surface serving as a sandwiching surface is formed in a concavo-convex shape so that the object 4 is formed. When pinched, it is configured to be firmly held without slipping.

Moreover, as shown in FIG.1 and FIG.2, each base end side part of the 1st half body 1 and the 2nd half body 2 which comprises the opening / closing operation part 5 has higher rigidity than the movable factor part 8 mentioned later. The rod-shaped portion 11 is provided, and a finger insertion portion 12 for inserting a finger when the opening / closing operation portion 5 is opened and closed by a fingertip picking operation is provided on the proximal end side of the rod-shaped portion 11. The finger insertion portion 12 is a force point portion 9 that applies a closing force to the opening / closing operation portion 5.

The finger insertion portion 12 serving as the power point portion 9 is formed in a circular ring shape having a diameter into which the fingertip can be inserted, and the fingertip is inserted into the circular ring finger insertion portion 12 to operate the opening / closing operation portion 5. Thus, not only a closing operation for applying a closing force inward but also an operation for expanding the opening / closing operation part 5 outward can be operated with two fingers.

The opening / closing operation unit 5 of the present embodiment will be described in more detail. The proximal side portion of the first half 1 is provided with a contact portion 6 in the middle of the rod-shaped portion 11 and more than the contact portion 6. The notch recess 13 is provided on the base end side.

Specifically, the contact portion 6 is provided in a protruding state in the longitudinal direction of the rod-like portion 11, and has a configuration in which a convex portion 6a (specifically, an acute-angle-shaped convex portion 6a) is provided at the tip portion. The abutting portion 6 is configured as a fixed abutting portion 6 integrally formed with the rod-shaped portion 11 and provided in the middle portion of the rod-shaped portion 11.

That is, the fixed contact portion 6 of the present embodiment is integrally formed with the rod-shaped portion 11 and provided in a fixed state on the rod-shaped portion 11 so that the movable contact portion 7 is in contact with the fixed contact portion 6. However, even if it presses this fixed contact part 6, it is comprised so that it may become a stopper which stops the movement of this movable contact part 7, without moving or deform | transforming.

Further, the notch recess 13 is provided on the base end side (finger insertion portion 12 side) of the rod-shaped portion 11, and specifically, the thickness of the rod-shaped portion 11 is about half the thickness on the upper side of the rod-shaped portion 11. The movable contact portion 7 described later is formed in a shape that can be movably disposed.

In addition, the base end side portion of the second half 2 facing the base end side portion of the first half 1 provided with the fixed contact portion 6 is movable between the rod-like portion 11 and the finger insertion portion 12. The contact portion 7 and the movable factor portion 8 are provided.

Specifically, a first half body in which a movable factor 8 is connected to the base end of the rod-shaped part 11, a movable contact 7 is connected to the movable factor 8, and a fixed contact 6 is provided. When a closing force is applied to the opening / closing operation unit 5 including the base end side portion 1 and the base end side portion of the second half 2 provided with the movable contact portion 7 and the movable factor portion 8, the movable factor portion 8, the base end side portion of the second half 2 provided with the movable factor 8 is deformed, and the movable contact portion 7 approaches the fixed contact portion 6 provided in the first half 1 by this deformation. It is configured to move in the moving direction and to contact the fixed contact portion 6.

More specifically, the movable factor portion 8 forms a plate-like body set to a predetermined rigidity that can be elastically deformed by a closing force applied to the opening / closing operation portion 5 in a C shape, and one end portion is a rod-like portion 11. 3, the other end is connected to the movable contact portion 7, and a closing force is applied to the finger insertion portion 12 serving as the power point portion 9 provided at the proximal end portion of the opening / closing operation portion 5. As shown in FIG. 4, the end portion on the side (hereinafter referred to as the movable side end portion 14a) connected to the movable contact portion 7 is a rod-shaped portion so that the gap between both end portions of the movable factor portion 8 is narrowed. 11 is deformed so as to approach an end portion (hereinafter referred to as a fixed-side end portion 14 b) connected to 11, so that the movable contact portion 7 approaches the fixed contact portion 6 by this deformation. It is configured to move.

In other words, in this embodiment, the movable factor 8 itself is elastically deformed, and the movable factor 8 is elastically deformed so that the movable abutting part 7 moves in a direction approaching the fixed abutting part 6. It is configured to do.

In addition, the movable contact portion 7 that is connected to the movable cause portion 8 and is movable by the movable cause portion 8 is a closing direction of the opening / closing operation portion 5 (in this embodiment, the closing direction of the second half 2). The shape of the abutting surface of the movable abutting portion 7 that abuts against the fixed abutting portion 6 is formed in an arc shape and is held by the opening / closing operation portion 3. When the diameter or thickness of the object 4 to be changed changes, the contact position of the movable contact portion 7 that contacts the fixed contact portion 6 changes, but the deformation of the deformation of the second half 2 caused by the movable factor portion 8 changes. The amount, that is, the deformation amount of the movable factor portion 8 is configured not to change.

More specifically, the movable abutting portion 7 has a proximal end portion connected to both the end portion of the movable factor portion 8 and the finger insertion portion 12, and substantially the rod-like portion 11 of the second half 2. The second half 2 is projected inward so as to be orthogonal to the inner side in the closing direction. When the opening / closing operation portion 5 is in the closed state, the first half 1 crosses the notch recess 13 provided in the first half 1. It is configured in a shape that is arranged in a crossing state with the body 1.

Further, the movable contact portion 7 has a contact surface 7b that contacts the fixed contact portion 6 in a circular arc shape, and a convex portion 6a provided at the tip of the fixed contact portion 6 on the contact surface 7b. And a plurality of recesses 7a to be fitted.

Specifically, the recess 7a is formed by forming a V-groove along the short direction (width direction) of the movable contact portion 7, and in this embodiment, the recess 7a is made movable. When the diameter of the object 4 held by the opening / closing operation unit 3 is small (or thin) as a configuration in which the contact unit 7 is arranged in parallel in the longitudinal direction (length direction), this movable contact is possible. The concave portion 7 a provided on the base end side in the longitudinal direction of the portion 7 engages (fits) with the convex portion 6 a provided at the distal end portion of the fixed contact portion 6, and the diameter of the object 4 sandwiched by the opening / closing operation portion 3 is the same. When it is large (or thick), the concave portion 7a provided on the distal end side in the longitudinal direction of the movable contact portion 7 is engaged (fitted) with the convex portion 6a provided on the distal end portion of the fixed contact portion 6. Yes.

That is, in this embodiment, when the diameter or thickness of the object 4 held by the opening / closing operation unit 3 changes, the contact position of the movable contact portion 7 that contacts the fixed contact portion 6 varies. The elastic deformation amount of the movable factor portion 8 until the abutting portion 7 abuts on the fixed abutting portion 6 does not change, and is always the same regardless of the diameter and thickness of the object 4 held by the opening / closing operation portion 3. Thus, the movable contact portion 7 is configured to contact the fixed contact portion 6.

Moreover, although the present Example comprised the opening-and-closing operation part 3 as a clamping part, the shape which can cut | disconnect the target object 4 in each front end side part of the 1st half body 1 and the 2nd half body 2, ie, a cutting blade, is provided. Alternatively, the opening / closing operation unit 3 may be configured as a cutting unit.

In addition, the code | symbol 15 is a finger | toe latching | locking part which latches fingers other than having been inserted in the finger insertion part 12, when inserting a finger in the finger insertion part 12 and operating the opening / closing operation part 5. FIG.

The operation and effect of the present embodiment configured as described above will be described below.

An object 4 is arranged between the front end side parts of the first half 1 and the second half 2 facing each other, that is, in the opening / closing operation part 3 serving as a clamping part, and the first half 1 and the second half facing each other. When the closing force that presses inward in the closing direction is applied to the base end side portion with respect to 2, that is, the opening / closing operation portion 5, the pivot attachment portion 10 that pivotally attaches the first half 1 and the second half 2. With the fulcrum as a fulcrum, the opening / closing operation unit 3 can be closed to hold the object 4.

Further, if the closing force applied inward in the closing direction is applied to the opening / closing operation unit 5 while increasing the closing force applied to the opening / closing operation unit 5 while the object 4 is sandwiched by the opening / closing operation unit 3, The movable factor 8 is elastically deformed by the force.

Specifically, the movable side end portion 14a approaches the fixed side end portion 14b so that the distance between the movable side end portion 14a and the fixed side end portion 14b of the movable cause portion 8 formed in a C shape is narrowed. It deforms as follows.

Due to the deformation of the movable factor portion 8, the movable contact portion 7 connected to the movable side end portion 14 a of the movable cause portion 8 moves so as to approach the fixed contact portion 6.

Further, when the movable contact portion 7 is moving, the closing force applied to the opening / closing operation portion 5 is transmitted to the opening / closing operation portion 3, and the holding force for the opening / closing operation portion 3 to hold the object 4 is The opening / closing operation portion 5 increases as the closing force increases.

Even after the movable contact portion 7 is moved so as to approach the fixed contact portion 6, if the closing force is further applied to the opening / closing operation portion 5, the deformation by the movable cause portion 8 is further increased. As a result, the movable contact portion 7 further approaches the fixed contact portion 6 and comes into contact with the fixed contact portion 6.

When the movable contact portion 7 comes into contact with the fixed contact portion 6, the convex portion 6 a provided at the distal end portion of the fixed contact portion 6 formed in an acute angle is formed on the contact surface 7 a of the movable contact portion 7. One of the provided recesses 7a is fitted and locked.

Specifically, as shown in FIGS. 2 (a) and 3 (a), when the object 4 having a small diameter (thin thickness) is sandwiched, the movable contact portion 7 is located in the vicinity of the middle portion in the longitudinal direction. The provided V-groove-shaped concave portion 7a is fitted into the convex portion 6a provided in the fixed contact portion 6, and has a large diameter (thickness) as shown in FIGS. 2 (b) and 3 (b). When the object 4 is sandwiched, the concave portion 7 a provided in the vicinity of the distal end side in the longitudinal direction of the movable contact portion 7 is fitted into the convex portion 6 a provided in the fixed contact portion 6.

Further, in each of the case where the proximal-side concave portion 7a is fitted to the fixed contact portion 6 and the distal-side concave portion 7a is fitted to the fixed contact portion 6, the respective concave portions 7a. Is fitted and abutted on the convex portion 6 a provided at the tip of the fixed abutting portion 6 with the same amount of elastic deformation of the movable factor portion 8.

That is, the amount of elastic deformation of the movable factor 8 until the movable abutting part 7 abuts on the fixed abutting part 6 is independent of the diameter and thickness of the object 4 held by the opening / closing work part 3 (in other words, Even if the diameter or thickness of the object 4 changes and the contact position at which the movable contact portion 7 contacts the fixed contact portion 6 varies), the movable contact portion 7 comes into contact with the fixed contact portion 6. The closing force applied to the opening / closing operation unit 5 by the time the (fitting and locking) is always applied with the same closing force, and this movable contact portion 7 is provided at the distal end portion of the fixed contact portion 6. The closing force that is applied to the opening / closing operation unit 5 until it comes into contact with the convex portion 6a is always applied with the same closing force regardless of the diameter and thickness of the object 4 held by the opening / closing operation unit 3. Therefore, the maximum value of the closing force transmitted to the opening / closing operation unit 3 before the movable contact portion 7 contacts the fixed contact portion 6 is always constant. Because, the maximum clamping force the movable abutment 7 can exhibit that open working unit 3 until it abuts against the fixed abutment 6 is always constant.

Further, since the fixed contact portion 6 with which the movable contact portion 7 contacts is provided in a fixed state on the rod-like portion 11 of the first half 1, the movable contact portion 7 is fitted and locked. Even if the movable contact portion 7 is pressed, the movable contact portion 7 does not move or deform and becomes a stopper for stopping the movement of the movable contact portion 7, and the fixed contact portion 6 serving as the stopper is connected to the movable contact portion 7. Makes it impossible for the movable contact portion 7 to move further to the fixed contact portion 6 side, so that the movable contact portion 7 cannot move to the fixed contact portion 6 side. As the abutting portion 7 stops moving, the elastic deformation of the movable cause portion 8 also stops.

In addition, the clamping force with which the opening / closing operation unit 3 clamps the object 4 is from the time when the movable contact portion 7 moves in the direction approaching the fixed contact portion 6 to the time when the movable contact portion 7 contacts the fixed contact portion 6. Although it continues to increase as the closing force applied to the opening / closing operation unit 5 increases, when the movable contact portion 7 contacts the fixed contact portion 6, the increase of the holding force for the opening / closing operation portion 3 to hold the object 4 increases. Stop.

Further, even when the closing force applied to the opening / closing operation unit 5 is further increased in a state where the fixed contact portion 6 and the movable contact portion 7 are in contact with each other, the deformation caused by the movable factor portion 8 does not proceed, and this fixed The deformed state when the movable abutting portion 7 abuts against the abutting portion 6 is maintained, and the deformation caused by the movable factor portion 8 does not advance, so that the movable abutting portion 7 does not move, and this movable abutting portion Since 7 does not move, this further increasing closing force applied to the opening / closing operation portion 5 is not transmitted to the opening / closing operation portion 3, and the holding force for holding the object 4 by the opening / closing operation portion 3 is kept constant. .

Further, as described above, in the present embodiment, the movable contact portion 7 is movable by the movable factor portion 8, and therefore, when the movable factor portion 8 is configured, the elastic modulus of the movable factor portion 8 is small. In other words, if the movable cause portion 8 is configured using a soft member, a member having a small diameter, or a thin member, the closing force applied to the opening / closing operation portion 5 is small. Since the movable contact portion 7 comes into contact with the fixed contact portion 6 easily elastically deforming, the closing force transmitted to the opening / closing operation portion 3 is small, so that the holding force for the opening / closing operation portion 3 to hold the object 4 is also reduced. It can be set as the structure which exhibits only a small clamping force.

Further, for example, the fixed contact portion 6 is configured to be movable in the contact and separation direction with respect to the movable contact portion 7 so that the distance until the movable contact portion 7 contacts the fixed contact portion 6 can be adjusted. It is good also as a structure which makes it adjustable and can adjust the maximum clamping force which the opening-and-closing work part 3 exhibits.

That is, if the distance until the movable contact portion 7 contacts the fixed contact portion 6 is shortened, in other words, the movable contact portion 7 is fixed to the fixed contact portion 6 with a small deformation amount of the movable factor portion 8. With this structure, the closing force applied to the opening / closing operation unit 5 until the movable contact portion 7 contacts the fixed contact portion 6 is reduced, and the closing force transmitted to the opening / closing operation portion 3 is thereby reduced. Therefore, if the distance until the movable contact portion 7 contacts the fixed contact portion 6 is increased, in other words, the movable factor portion is reduced. If the movable contact portion 7 does not contact the fixed contact portion 6 unless the 8 is greatly deformed, the movable contact portion 7 is added to the opening / closing operation portion 5 until the movable contact portion 7 contacts the fixed contact portion 6. The closing force transmitted is increased, and the closing force transmitted to the opening / closing work unit 3 is thereby increased. It becomes large, thus, it is possible to increase the clamping force to open and close the working part 3 exhibits.

As described above, the present embodiment can easily realize a design that adjusts the maximum clamping force that can be exhibited by the opening / closing operation unit 3 in accordance with the application.

Therefore, the elastic modulus of the movable factor portion 8 is held so small that the holding force that crushes, breaks, or scratches the object 4 held by the opening / closing operation unit 3 is not exerted. By setting so that only the force is exerted, no matter how great the closing force is applied to the opening / closing operation unit 5, the closing force of a predetermined value or more is not transmitted to the opening / closing operation unit 3, and the opening / closing operation unit 3 The operator exerts only a clamping force that does not crush, break, or scratch, so that the operator applies too much closing force to the opening / closing operation unit 5 and crushes the object 4 clamped by the opening / closing operation unit 3. In order to prevent damage and scratches, close the open / close operation unit 5 while performing delicate and fine operations that apply a close force to the open / close operation unit 5 by applying a delicate force to the open / close operation unit 5 by concentrating the nerves on the fingers and fingertips. The troublesome task of applying power There is no need for it, for example, it is easy to break and scratches with extremely simple operations such as gripping operation and fingertip operation that do not require fine adjustment of the gripping force and force of gripping with the fingertip. It is an epoch-making opening / closing work tool with excellent practicality and operability that can easily hold a delicate object 4 that is easily attached.

Specific Example 2 of the present invention will be described with reference to FIGS.

The present embodiment is a case where the configuration of the movable factor portion 8 is different from the first embodiment, and specifically, the movable factor portion 8 is configured in a hinge form.

More specifically, as shown in FIG. 4, the movable factor portion 8 of the present embodiment is connected to the movable arm portion 16 a provided continuously with the movable contact portion 7 and the rod-like portion 11 of the second half 2. A fixed arm portion 16b to be provided, a pivot shaft 17 for pivotally mounting a pivot-side end portion of the movable arm portion 16a and a pivot-side end portion of the fixed arm portion 16b, and a movable contact portion 7 of the movable arm portion 16a. And an elastic body 18 disposed between a continuous side end portion provided continuously with the rod-like portion 11 of the fixed arm portion 16b and a continuous side end portion provided continuously with the fixed arm portion 16b. The continuous side end portion of 16a is movable toward and away from the continuous side end portion of the fixed arm portion 16b. In the embodiment, the coil spring 18) keeps the distance between the respective continuous side ends constant, and when a closing force is applied to the opening / closing operation portion 5, the closing force applied to the opening / closing operation portion 5 Spring 18 is retracted and movable The continuous side end of the portion 16a is movable so as to approach the continuous side end of the fixed arm portion 16b. In this embodiment, the continuous side end of the movable arm portion 16a is fixed to the fixed arm portion 16b. The movable arm portion 16a is rotated about the pivot shaft 17 so as to approach the end portion on the side of the continuous connection, so that the movable contact portion 7 connected to the movable arm portion 16a becomes the fixed contact portion 6. It is configured to move in the approaching direction.

In the present embodiment, the coil spring 18 is employed as the elastic body 18, but as shown in FIG. 5, a configuration in which the torsion spring 18 is employed instead of the coil spring 18 may be used. An arm-like spring provided with 18 coil portions 18a on the pivot shaft 17 and one arm-like spring portion 18b of the torsion spring 18 provided on the side of the side of the movable arm portion 16a provided with the movable contact portion 7. The coil described above is configured by engaging with the engaging portion 19a and engaging the other arm-like spring portion 18c with the arm-like spring engaging portion 19b provided at the continuous side end of the fixed arm portion 16b. The same effects as when the spring 18 is employed can be exhibited.

Further, in this embodiment, the elastic modulus of the elastic body 18 constituting the movable factor 8, specifically, the spring constants of the coil spring 18 and the torsion spring 18 having a desired size can be used for opening and closing. The degree of deformation of the movable factor 8 that is deformed by the closing force applied to the operation unit 5 can be adjusted to a desired degree of deformation.

That is, if the coil spring 18 or the torsion spring 18 having a small spring constant is used, the movable factor portion 8 is easily deformed and the movable contact portion 7 becomes the fixed contact portion 6 with a small closing force applied to the opening / closing operation portion 5. Therefore, the maximum clamping force that can be exerted by the opening / closing operation part 3 is reduced, and if the coil spring 18 or the torsion spring 18 having a large spring constant is used, the movable factor part 8 is not easily deformed and the opening / closing operation part. If the closing force applied to 5 is not increased, the movable contact portion 7 does not contact the fixed contact portion 6. Therefore, the maximum clamping force that can be exhibited by the opening / closing operation portion 3 is also increased. It is an epoch-making opening / closing work tool that can easily realize design by adjusting the elastic modulus of the elastic body 18 (the spring constant of the coil spring 18 or the torsion spring 18) for adjusting the maximum clamping force that can be exerted by the portion 3. .

Other configurations are the same as those in the first embodiment.

Specific Example 3 of the present invention will be described with reference to FIGS.

The present embodiment is a case where the configuration of the notch recess 13 in which the movable contact portion 7 can be movably disposed is different from that of the first embodiment. Specifically, the configuration of the notch recess 13 is as follows. This is a case where the movable abutting portion 7 is in contact with the fixed abutting portion 6 so that it can be maintained without continuously applying a closing force to the opening / closing operation portion 5.

More specifically, as shown in FIG. 6, the notch recess 13 of the present embodiment is constituted by a locking step portion 20 and a depression step portion 21, and the object 4 is sandwiched by the opening / closing operation portion 3. When the closing force is applied to the opening / closing operation part 5, the movable contact part 7 movable along the upper surface of the locking step part 20 so as to approach the fixed contact part 6 is brought into contact with the fixed contact part 6. As shown in FIG. 7, the movable contact portion 7 that has fallen into the depressed step portion 21 is locked to the distal end portion 20a of the locking step portion 20 so that it cannot move. It is composed.

8A shows a state before the movable contact portion 7 rides on the locking step portion 20, and FIG. 8B shows a state where the movable contact portion 7 contacts the locking step portion 20, FIG. 8C shows a state where the movable abutment part 7 comes into contact with the fixed abutment part 6 and falls down into the stepped part 21 as shown in FIG. 8C. It shows a state where it cannot move due to contact with the tip 20a of the locking stepped portion 20.

Other configurations are the same as those in the first embodiment.

Specific Example 4 of the present invention will be described with reference to FIGS.

The present embodiment is a case where the configurations of the fixed contact portion 6 and the movable contact portion 7 are different from those of the first embodiment. Specifically, the fixed contact portion 6 is closed in the closing direction of the opening / closing operation portion 5. When the diameter, thickness, or shape of the object 4 held by the opening / closing operation unit 3 is changed, the fixed contact portion 6 contacts the movable contact portion 7. This is a case where the contact position varies.

More specifically, as shown in FIG. 9, the fixed contact portion 6 is inwardly in the closing direction of the opening / closing operation portion 5 (in the present embodiment, the closing direction of the first half 1). The shape of the contact surface with which the movable contact portion 7 contacts is formed in an arc shape, and the tip of the movable contact portion 7 described later is formed on the contact surface formed in the arc shape. The recessed portions 6a to be fitted are arranged in parallel in a plurality of connected states.

The movable contact portion 7 is connected to the movable side end portion 14a of the movable cause portion 8, and a convex portion 7a having a shape that can be fitted into the concave portion 6a of the fixed contact portion 6 described above is provided at the distal end portion. It is configured.

In the present embodiment, as shown in FIG. 10, when the closing force is applied to the opening / closing operation section 5 with the object 4 held between the opening / closing operation section 3, as shown in FIG. The movable abutting portion 7 approaches the fixed abutting portion 6 and abuts against the fixed abutting portion 6 by elastic deformation of the movable factor portion 8.

In addition, as in the third embodiment, the present embodiment is configured so that the movable contact portion 7 can be maintained in contact with the fixed contact portion 6 without continuing to apply a closing force to the opening / closing operation portion 5. Yes.

Specifically, the sliding part 22 and the depression step part 23 are provided in the fixed abutting part 6, and the depression fitting part 23 is provided in the depression step part 23 provided in the fixed abutting part 6 at the tip of the movable abutting part 7. In the state where the locking projection 24 to be stopped is provided and the movable contact portion 7 approaches the fixed contact portion 6, the sliding portion provided on the fixed contact portion 6 as shown in FIG. FIG. 11B shows a state in which the locking projection 24 provided on the tip of the fixed contact portion 6 slides on the upper surface 22 and the movable contact portion 7 contacts the fixed contact portion 6. Further, the locking convex portion 24 of the movable contact portion 7 falls into the stepped portion 23 provided inside the sliding portion 22 of the fixed contact portion 6, and the side surface 23a of the stepped portion 23 is lowered by the return bias. It is configured so that it can be held even if it does not continue to apply a closing force to the closing operation portion 5 by being locked in the pressure contact state.

Other configurations are the same as those in the first embodiment.

Specific Example 5 of the present invention will be described with reference to FIGS.

A present Example is a case where this invention is comprised as an expansion work tool, Specifically, the 1st half 1 and the 2nd half 2 are pivotally attached, and the 1st half 1 which opposes and An opening / closing operation unit 3 having a distal end side portion with the second half body 2 as an expanding portion, and the base end side portions of the first half body 1 and the second half body 2 facing each other inward in a closing direction. The opening / closing operation tool is configured to open the object 4 by opening and closing the operation unit 3 by applying a pressing closing force.

More specifically, in the present embodiment, as shown in FIG. 12, the first half 1 and the second half 2 are formed in a U-shape or a U-shape, respectively. The parts are superposed on each other and the entire shape is formed into a substantially X shape.

Further, as shown in FIG. 13, when a closing force is applied to the opening / closing operation unit 5 while the opening / closing operation unit 3 is in contact with the object 4, the movable factor 8 is elastically deformed as in the first embodiment. Then, the movable contact portion 7 approaches the fixed contact portion 6 due to the elastic deformation of the movable cause portion 8 and comes into contact with the movable contact portion 6. Even if the closing force is increased and applied to the opening / closing operation unit 5, the closing force further applied to the opening / closing operation unit 5 is not transmitted to the opening / closing operation unit 3, and the object 4 is expanded with a constant expanding force. The state is configured to be maintained.

Other configurations are the same as those in the first embodiment.

The present invention is not limited to the first to fifth embodiments, and the specific configuration of each component can be designed as appropriate.

Claims

The first half and the second half are pivotally attached, and the opening / closing operation part having the sandwiching part or the cutting part or the widening part as the tip side part of the opposing first half and the second half, By applying a closing force that presses the proximal end sides of the first half and the second half facing each other inward in the closing direction, the opening / closing operation portion is closed or opened to pinch or cut the object. Alternatively, in the opening / closing operation tool that is an opening / closing operation portion that is expanded, a contact portion is provided on one of the first half and the second half, and the other is relatively approaching and contacting the other. A movable contact part is provided, a movable factor part is provided in the middle part of the base end side part of the first half or the second half, and the object is held by the opening / closing work part or the opening / closing work When a closing force is applied to the opening / closing operation part with the part in contact with the object, the movable factor part causes the first The base end side portion of the half body or the second half body is deformed, and by this deformation, the movable contact portion is moved so as to be relatively close to the contact portion. The movable abutting portion is configured to abut against the abutting portion. When the movable abutting portion is moved by the deformation and comes into contact with the abutting portion, the deformation stops, The first half or the second half is not further deformed by the movable factor even if the closing force applied to the opening / closing operation part is further increased in a state where the movable contact part comes into contact with and stops. The opening / closing operation tool is configured so that the closing force applied to the opening / closing operation unit further increased is not transmitted to the opening / closing operation unit.
The first half and the second half are pivotally attached, and the opening / closing operation part having the sandwiching part or the cutting part or the widening part as the tip side part of the opposing first half and the second half, By applying a closing force that presses the proximal end sides of the first half and the second half facing each other inward in the closing direction, the opening / closing operation portion is closed or opened to pinch or cut the object. Alternatively, in the opening / closing operation tool that is an opening / closing operation unit that is expanded, a fixed contact portion is provided on one of the first half and the second half, and the movable factor that is movable by the movable factor is provided on the other. A contact portion, and the movable contact portion applies a closing force to the opening / closing operation portion in a state where the object is held by the opening / closing operation portion or a state where the opening / closing operation portion is contacted to the object. In addition, the first half or the second half provided with the movable contact portion is deformed by the movable factor portion. It is configured to move so as to approach the fixed contact portion by this deformation, and to contact the fixed contact portion by movement due to this deformation, and the movable contact portion contacts the fixed contact portion. In this state, even if the closing force applied to the opening / closing operation unit is further increased, the closing force applied to the opening / closing operation unit is not further transmitted to the opening / closing operation unit. If the contact portion is in a contact state, even if a closing force is further applied to the opening / closing operation portion, the opening / closing operation portion holds the object, a cutting force that cuts the object, or the object An opening / closing work tool characterized in that the expansion force for expanding the opening is held in a constant state.
The first half and the second half are pivotally attached, and the opening / closing operation part having the sandwiching part or the cutting part or the widening part as the tip side part of the opposing first half and the second half, By applying a closing force that presses the proximal end sides of the first half and the second half facing each other inward in the closing direction, the opening / closing operation portion is closed or opened to pinch or cut the object. Alternatively, in the opening / closing operation tool that is an opening / closing operation unit that is expanded, a fixed contact portion is provided on one of the first half and the second half, and the movable factor that is movable by the movable factor is provided on the other. A contact portion, and the movable contact portion applies a closing force to the opening / closing operation portion in a state where the object is held by the opening / closing operation portion or a state where the opening / closing operation portion is contacted to the object. In addition, the first half or the second half provided with the movable contact portion is deformed by the movable factor portion. It is configured to move so as to approach the fixed abutting portion by this deformation, and to abut against the fixed abutting portion by movement due to this deformation, and the opening or closing operation of the fixed abutting portion or the movable abutting portion is performed. When the diameter, thickness, or shape of the object to be sandwiched, cut, or expanded is changed by the opening / closing operation portion, the fixed contact portion is formed. A state where the contact position of the movable contact portion with respect to the movable contact portion or the contact position of the fixed contact portion with respect to the movable contact portion varies, When a closing force is applied to the opening / closing operation portion in a state where the opening / closing operation portion is in contact with the object, the movable contact portion is brought into contact with the fixed contact portion by the deformation caused by the movable factor portion. Approach Even if the closing force applied to the opening / closing operation part is further increased in a state where the movable contact part is in contact with the fixed contact part and the movable contact part is in contact with the fixed contact part, this further A configuration in which the increased closing force is not transmitted to the opening / closing operation unit as a clamping force, a cutting force, or an expanding force, or a further increased closing force is applied to the opening / closing as a clamping force, a cutting force, or an expanding force. An opening / closing work tool configured to reduce a transmission ratio transmitted to a working portion as compared to a transmission ratio before the movable contact portion contacts the fixed contact portion.
The first half and the second half are pivotally attached, and the opening / closing operation part having the sandwiching part or the cutting part or the widening part as the tip side part of the opposing first half and the second half, By applying a closing force that presses the proximal end sides of the first half and the second half facing each other inward in the closing direction, the opening / closing operation portion is closed or opened to pinch or cut the object. Alternatively, in the opening / closing operation tool that is an opening / closing operation unit that is expanded, a fixed contact portion is provided on one of the first half and the second half, and the movable factor that is movable by the movable factor is provided on the other. The fixed abutting portion is provided with a convex portion or a concave portion on a surface facing the movable abutting portion, and the movable abutting portion is provided on a surface facing the fixed abutting portion. When the concave portion or the convex portion that fits the convex portion or the concave portion provided in the fixed contact portion is provided. In addition, when a closing force is applied to the opening / closing operation unit while the object is held by the opening / closing operation unit or the opening / closing operation unit is in contact with the object, the movable factor unit performs the movable contact. The first half or the second half provided with the contact portion is deformed, and is movable so as to approach the fixed contact portion by this deformation, and contacts the fixed contact portion by the movement due to the deformation. When the closing force is applied to the opening / closing operation unit in a state where the object is held by the opening / closing operation unit or the opening / closing operation unit is in contact with the object, the movable factor unit The convex portion provided in the fixed contact portion and the concave portion provided in the movable contact portion that are movable so that the movable contact portion approaches the fixed contact portion by the generated deformation, or The concave portion provided in the fixed contact portion and the front The convex portion provided on the movable contact portion is fitted and the fixed contact portion and the movable contact portion are fitted and locked, and the movable contact portion is engaged with the fixed contact portion. Even if the closing force applied to the opening / closing operation unit is further increased in a stopped state, the further increased closing force is not transmitted to the opening / closing operation unit as a clamping force, a cutting force, or an expanding force, or this The transmission ratio at which the closing force applied further increases is transmitted to the opening / closing work part as a clamping force, a cutting force, or an expanding force, before the movable contact part is fitted and locked to the fixed contact part. An opening / closing work tool characterized by being configured to reduce the transmission ratio.
A closing force is applied to the movable factor part in the middle part of the base end side part of the first half or the second half provided with the movable contact part and when the opening / closing operation part is closed. The opening / closing work tool according to any one of claims 2 to 4, wherein the opening / closing tool is provided on a tip side of the force point portion.
The fixed abutting portion or the movable abutting portion is formed in a shape projecting inwardly in the closing direction of the opening / closing operation portion, and the movable abutting portion of the fixed abutting portion abuts. The shape of the abutting surface or the abutting surface that abuts on the fixed abutting portion of the movable abutting portion is formed in an arc shape, and the diameter, thickness, or shape of the object to be sandwiched, cut or expanded by the opening / closing operation portion When changed, the contact position of the movable contact portion with respect to the fixed contact portion or the contact position of the fixed contact portion with respect to the movable contact portion varies, but the first caused by the movable factor portion The opening / closing work tool according to any one of claims 2 to 4, wherein the deformation amount of the deformation of the half body or the second half body is not changed.
The fixed abutting portion or the movable abutting portion is formed in a shape projecting inwardly in the closing direction of the opening / closing operation portion, and the movable abutting portion of the fixed abutting portion abuts. The shape of the abutting surface or the abutting surface that abuts on the fixed abutting portion of the movable abutting portion is formed in an arc shape, and the diameter, thickness, or shape of the object to be sandwiched, cut or expanded by the opening / closing operation portion When changed, the contact position of the movable contact portion with respect to the fixed contact portion or the contact position of the fixed contact portion with respect to the movable contact portion varies, but the first caused by the movable factor portion The opening / closing work tool according to claim 5, wherein the deformation amount of the deformation of the half body or the second half body is not changed.