JP2006194520A - Catch fork - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a catch fork capable of stably and surely performing opening and closing movement of an arm with enhanced durability. <P>SOLUTION: This catch fork is provided with a pair of arms 16 and a shaft 14, a base part of the arm 16 is journaled to an end of the shaft 14, an end of the arm 16 can be opened and closed, and the catch fork is provided with a spring 20 for energizing the pair of the arms 16 to the opening movement direction to which ends thereof are opened, a stopper 22 arranged in the shaft 14 so as to be able to slide along the axial direction, and a spring 24 for energizing the stopper 22 to the direction intruding into the base part of the arms 16. The stopper 22 intrudes into the base part of the pair of the arms 16, and is abutted to the base part, and thereby a predetermined opened angle of the arm 16 is maintained, and opening and closing movement of the arm 16 is prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a piercing crotch comprising a pair of arms and a shaft, wherein the base of the arm is pivotally attached to the tip of the shaft, and the tip of the arm can be opened and closed.

  Conventionally, as this kind of stabbed crotch, there has been known a sushi mechanism wand described in Patent Document 1.

  The sword mechanism guard described in this document can be opened and closed around the rotation axis that is the two fulcrum of the two arms, and the axis of the rotation axis is separated from the rotation axis. The slide rib is movable in the axial direction perpendicular to the direction through a spring, and the slide rib slides in and out along an S-shaped slope formed at the base of the arm. . Normally, the outer cover is attached to the arm, and the arm is closed. However, when the outer cover is removed, the slide rib follows the S-shaped slope at the base of the arm by the biasing force of the spring. And the arm opens. When the slide rib enters the cam-like bottom of the arm base, the arm cannot be closed, and the arm opening operation is defined by the arm base contacting the inner wall of the main body supporting the arm. It has come to be.

JP 2001-183091 A

  However, since the conventional piercing described in the above publication induces the opening operation of the arm only by the urging force of the spring that urges the slide rib, the durability of the spring for operating the slide rib is improved. There's a problem.

  Furthermore, the opening operation of the arm is defined by the contact between the base portion of the arm and the main body, but the arm is biased in the opening direction by the biasing force of the spring that operates the slide rib. There is a problem that the pipe-shaped body that is in contact with the surface is deformed. If the main body is greatly deformed, it becomes impossible to attach the outer cover, which makes it unusable.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a piercing cuff that is capable of performing an arm opening / closing operation stably and reliably with high durability.

In order to achieve the above object, the invention according to claim 1 of the present invention comprises a pair of arms and a shaft, the base of the arm is pivotally attached to the tip of the shaft, and the tip of the arm can be opened and closed. It ’s a piercing crotch,
A first urging means for urging the pair of arms in an opening operation direction in which tips of the arms open to each other;
A stopper arranged to be slidable in the axial direction in the shaft;
Second urging means for urging the stopper in a direction to enter between the base portions of the arms,
The stopper enters between the base portions of the pair of arms and comes into contact with the base portions, thereby maintaining a state of a constant opening angle of the arms and disabling the opening / closing operation of the arms.

  The invention according to claim 2 is characterized in that the base portion and the stopper of the arm according to claim 1 are made of solid members.

  The invention according to claim 3 is characterized in that the stopper according to claim 1 or 2 makes surface contact with the base of the arm in a state of entering between the bases of the arm.

  According to a fourth aspect of the present invention, the shaft and the arm according to any one of the first to second aspects move between a storage position where the shaft and the arm are stored in the pipe and a use position where the arm protrudes from the tip of the pipe. The arm is opened at the use position.

  According to the present invention, the first urging means for urging the arm in the opening operation direction and the second urging means for urging the stopper in the direction of entering between the base portions of the arm are provided. Since two types of urging forces are used, each urging operation can be performed stably and reliably, and durability can be improved.

  According to invention of Claim 2, an arm and a stopper consist of a solid member, and when this solid member contact | abuts, the fixed opening angle of an arm is maintained and the opening / closing operation | movement of an arm is made impossible. Therefore, deformation of the member can be prevented and durability can be improved.

  According to the third aspect of the present invention, the arm and the stopper are brought into contact with each other by surface contact so that the arm can be maintained at a constant opening angle and the arm opening / closing operation can be disabled. Can be improved.

  According to the fourth aspect of the present invention, the arm is closed by the pipe at the storage position stored in the pipe, and the arm can open at the use position where the arm protrudes from the tip of the pipe. Therefore, the arm opening / closing operation can be determined by moving the arm relative to the pipe.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall view showing a piercing according to an embodiment of the present invention. In the figure, reference numeral 10 denotes a pierced crotch. The pierced crotch 10 is roughly a metal pipe 12, a metal shaft 14 slidable in the pipe 12, and a pair supported at the tip of the shaft 14. The metal arm 16 and the spring 18 disposed in the pipe 12 are provided.

  The shaft 14 and the arm 16 are always urged by a spring 18 in a direction protruding from the tip opening of the pipe 12. The shaft 14 is provided with a locking projection 14a that can be projected and retracted in a direction perpendicular to the axial direction of the shaft 14 by a spring (not shown). The locking projection 14a is a storage engagement formed on the pipe 12. The locking holes 12a and the protruding locking holes 12b can be selectively locked.

  FIG. 1 shows a use position in which the locking projection 14a is locked in the protruding locking hole 12b, and the shaft 14 and the arm 16 protrude from the end opening of the pipe 12, that is, the usage state. The latching protrusion 14a is latched by the storage latching hole 12a, and the storage position, ie, the storage state, in which the shaft 14 and the arm 16 are stored in the pipe 12 is shown.

  As shown in FIGS. 3 and 4, the arm 16 is pivotally supported by the shaft 14 at the rotation shafts 16a and 16a of the base, and the tip of the arm 16 is centered on the rotation shafts 16a and 16a. Opening and closing is possible. A spring (first urging means) 20 for urging the arms 16 in the opening operation direction to open the arms 16 is wound around the rotation shafts 16a and 16a of the arms 16. One end of the spring 20 is locked inside the one arm 16, and the other end of the spring 20 is locked inside the other arm 16. However, the spring 20 can be provided separately for each arm 16, and the first urging means can be constituted by two springs.

  A slit 14b extending in the axial direction is formed at the tip of the shaft 14, and a stopper 22 is disposed so as to be slidable in the axial direction in the slit 14b. The stopper 22 slides on the tip entry portion 22a at the tip, the widened portion 22b wider than the tip entry portion 22a, the spring receiving portion 22c wider than the widened portion 22b, and the center hole of the shaft 14. A shaft portion 22d that can move is provided (FIG. 7). In the slit 14b, a spring (second urging means) 24 is provided around the shaft portion 22d to constantly urge the stopper 22 toward the shaft tip, in other words, toward the arm 16. The tip of the spring 24 is in contact with the spring receiving portion 22 c of the stopper 22.

  The base portion of the arm 16 is a stopper receiving portion 16 b that abuts on the stopper 22. A cam inclined portion 16c that is inclined with respect to the longitudinal direction of the arm 22 and a notched portion 16d that is notched at an angle of 90 degrees are formed following the cam inclined portion 16c at the base end of the stopper receiving portion 16b.

  Moreover, it is also possible to provide a cap 30 (FIGS. 1 and 2) for attaching the tip of the pipe 12 as necessary.

  The operation of the piercing crotch 10 configured as described above will be described. When the piercing crotch 10 is not used, as shown in FIG. 2, the shaft 14 and the arm 16 are in a storage state in which the shaft 14 and the arm 16 are mostly stored in the pipe 12, and in this state, it can serve as a baton. Yes. As shown in FIGS. 5 and 6, the tips of the two arms 16 are closed in the pipe 12. At this time, the tip entry portion 22 a of the stopper 22 is a cam of the stopper receiving portion 16 b at the base of the arm 16. It is in contact with the inclined portion 16c.

  Next, when the original function of the piercing crotch 10 such as capturing the criminal is to be exhibited, if the cap 30 is present, the cap 30 is removed, and then the locking projection 14 a is pushed into the pipe 12. Then, the locking between the locking projection 14a and the storage locking hole 12a is released, the shaft 14 protrudes from the tip of the pipe 12 by the urging force of the spring 18, and the locking projection 14a protrudes from the protruding locking hole 12b. 1 to be used as shown in FIG.

  When the arm 16 moving forward in the pipe 12 together with the shaft 14 escapes from the pipe 12, the arm 16 moves in a direction to open each other by the urging force of the spring 20. Along with this movement, the tip entry portion 22a of the stopper 22 moves along the cam inclined portion 16c of the arm 16 by the urging force of the spring 24, and enters between the stopper receiving portions 16b of the base portions of the pair of arms 16. When the tip entry portion 22a of the stopper 22 is completely inserted between the two stopper receiving portions 16b, the notch portion 16d is engaged with the corner portion of the widened portion 22b. Due to the surface contact between the cam inclined portion 16c and the tip entry portion 22a and the surface contact between the notch portion 16d and the widened portion 22b, the arm 16 is prohibited from rotating in any direction around the rotation shaft 16a. That is, the movement in either the opening direction or the closing direction is prohibited, and the state at a constant opening angle as shown in FIG. 1 is maintained. Therefore, the function as a piercing crotch can be exhibited in this use state. Note that a slit 22e (see FIG. 8) is formed at the center of the tip entry portion 22a, and the spring 20 can be inserted through the slit 22e.

  When it is desired to return to the stored state of FIG. 2 after use, the spring receiving portion 22c of the stopper 22 is pushed back by hand against the urging force of the spring 24, and the tip entry portion 22a is After being escaped from the space and closing the arm 16 against the urging force of the spring 20, the arm 16 can be pushed into the pipe 12 to be stored.

  As described above, in this embodiment, the opening operation of the arm 16 and the operation of the stopper 22 for maintaining the constant opening angle of the arm 16 are performed by the two types of urging forces of the spring 20 and the spring 24. Therefore, the operating force and strength can be kept high, the operation after operating the locking projection 14a can be performed quickly, and the durability and reproducibility can be kept good. it can.

  Moreover, when maintaining the state of the constant opening angle of the arm 16, the opening angle of the arm 16 is determined by the stopper 22, and the shaft 14 is irrelevant, so that the shaft 14 is not deformed. Further, the stopper receiving portion 16b and the stopper 22 at the base of the arm 16 are not thin-walled members, but are solid block shapes. Due to the contact, deformation of the member can be prevented and durability can be improved. In addition, it can be used with certainty when fighting with the criminal.

It is a whole top view showing the use state of the piercing according to the embodiment of the present invention. It is a whole top view showing the accommodation state of the piercing crotch concerning the embodiment of the present invention. FIG. 2 is an enlarged plan view of an arm and a shaft tip portion in FIG. 1. FIG. 2 is an enlarged side view of an arm and a shaft tip portion in FIG. 1. It is a figure showing the internal structure of FIG. FIG. 3 is an enlarged side view of an arm and a shaft tip portion of FIG. 2. It is a figure showing the internal structure of FIG. It is the arrow view seen from the arrow 8 direction of FIG. FIG. 4 is an internal cross-sectional view of FIG. 3.

Explanation of symbols

10 Stitching 12 Pipe 14 Shaft 16 Arm 16a Rotating Shaft 16b Stopper Receiving Portion (Base)
20 Spring (first biasing means)
22 Stopper 24 Spring (second biasing means)

Claims (4)

A piercing crotch comprising a pair of arms and a shaft, the base of the arm being pivotally attached at the tip of the shaft, and the tip of the arm being capable of opening and closing,
A first urging means for urging the pair of arms in an opening operation direction in which tips of the arms open to each other;
A stopper arranged to be slidable in the axial direction in the shaft;
Second urging means for urging the stopper in a direction to enter between the base portions of the arms,
Stitching, wherein the stopper enters between the base portions of the pair of arms and abuts against the base portions, thereby maintaining a state of a constant opening angle of the arms and disabling the opening and closing operation of the arms.   The piercing crotch according to claim 1, wherein the base portion and the stopper of the arm are made of a solid member.   3. The piercing crotch according to claim 1, wherein the stopper makes surface contact with the base portion of the arm in a state of entering between the base portions of the arm. The shaft and the arm are movable between a storage position stored in the pipe and a use position in which the arm protrudes from the tip of the pipe, and the arm is opened at the use position. The piercing crotch according to any one of claims 1 to 3.

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