JP6178146B2 - grip - Google Patents

Description

  The present invention relates to a grip that constitutes a gripping operation portion of a manual operation tool for an industrial machine.

  In the prior art of the grip that constitutes the grip operation part of the manual operation tool of the industrial machine, as disclosed in Patent Documents 1 and 2, the grip body that is gripped by the palm and the long finger, and the top of the grip body And a switch that can be operated with a thumb, and the grip body includes a thumb spherical surface that comes into contact with the thumb ball, a palm surface that comes into contact with the middle part of the palm and the little finger ball, and a long finger that comes into contact with the long finger. And an open surface on which the thumb can be placed between the tip of the long finger and the thumb ball when gripped with a hand.

JP 2011-53789 A Japanese Patent Laid-Open No. 2005-120821

The above-mentioned prior art grip is a shape mainly for swinging a manual operation tool, and the thumb spherical surface and the long finger surface are smooth arc surfaces, and it is attached to the grip body when the wrist is bent or bent. The shape is not suitable for transmitting rotational power.
An object of the present invention is to provide a grip that can solve such problems of the prior art.

  An object of the present invention is to provide a grip that can be easily rotated by pressing with a thumb ball when palming the wrist and hooking a long finger when dorsally bending the wrist.

Specific means for solving the problems in the present invention are as follows.
The grip of the present invention constitutes the grip operation part 3 of the hand operation tool 2, the grip main body 5 gripped by the palm and the long finger, the thumb spherical surface B contacting the thumb ball, the middle part of the palm, A palm surface C that comes into contact with the little finger ball, a long finger surface D that comes into contact with the long finger, and an open surface E on which the thumb can be placed between the tip of the long finger and the thumb ball when gripped by a hand. A grip having
Between the thumb spherical surface B and the palm surface C of the grip body 5, a palm bending pressing portion G that presses with the thumb ball when the wrist is palm bent and transmits the rotational force to the grip body 5 is formed, the long finger surface D of the grip body 5 forms a back屈引hook H which transmits grip body 5 twice force by hooking the long finger when succumb back of the wrist, the palm屈押pressure portion G is the grip A portion that is projected so that the longest distance from the axial center of the main body 5 to the palm bending pressure portion G is larger than the longest distance from the axial center to the corner portion between the thumb spherical surface B and the open surface E. The dorsiflexion hooking portion H is formed adjacent to and adjacent to the recess 39 by forming a recess 39 that is recessed toward the inside of the grip body 5 between the long finger surface D and the open surface E. It is characterized by being a raised portion formed in the above manner.
Further, the part of the thumb spherical surface B continuous to the palm bending pressing part G is formed flat, and the palm bending is a corner part between the flat part of the thumb spherical surface B and the palm surface C. The radius of the pressing portion G is formed to be smaller than the corner portion between the thumb spherical surface B and the open surface E.

The front Symbol grip body (5) is fitted rotatably through a support shaft (40) relative to the lever rod (2a) of the manual tool (2), the support shaft body (40 ) Is provided with a rotation sensor (9) for detecting the rotation of the grip body (5) .
Further, a switch 6 that can be operated with a thumb is provided at the top A of the grip body 5, and a shallow groove-shaped thumb guide is provided on the upper part of the thumb spherical surface B of the grip body 5 so that the thumb's belly runs along the thumb 6. The portion Ba is formed in the vertical direction and toward the switch 6,
A raised portion Bc is formed between the thumb guide portion Ba and the palm surface C so as to resist the penetration of the hand into the switch 6 in the vertical direction along the thumb guide portion Ba. It is characterized in that the part G is connected.

Further, a push button 7 that is operated with an index finger or a middle finger is provided on the upper part of the long finger surface D of the grip body 5, and a raised protection part Da is formed around the push button on the upper part of the long finger surface D. The lower part of the fender part Da and the upper part of the dorsiflexion hook part H are connected.

According to the present invention, the turning operation of the grip body can be easily performed by palm flexion and dorsiflexion of the wrist.
That is , between the thumb spherical surface B and the palm surface C of the grip body 5, a palm bending pressing portion G that presses with the thumb ball when the wrist is palm bent and transmits the rotational force to the grip body 5 is formed. The long finger surface D of the grip body 5 is formed with a dorsiflexion hooking portion H that hooks the long finger to transmit the rotational force to the grip body 5 when the wrist is bent back. The grip body 5 can be rotated by pressing the palm bending pressing portion G with a finger ball, and the grip body 5 can be rotated by hooking a long finger on the dorsiflexion hooking portion H when the wrist is bent backward. Easy operation.

Further , a raised portion Bc that provides resistance to the penetration of the hand into the switch 6 is formed between the thumb guide portion Ba and the palm surface C in the vertical direction along the thumb guide portion Ba. Since it connects with the press part G, the up-and-down range of the palm bending press part G which a thumb ball presses when palming a wrist becomes wide, and the palm body rotation of the grip main body 5 becomes more reliable and easy.
Further , a raised protection part Da is formed around the push button on the upper part of the long finger surface D, and the lower part of the protection part Da and the upper part of the back buckling hook part H are connected. It becomes a guide part for guiding the long finger to the push button 7, and the push button 7 serves as a guide for hooking the long finger to the dorsiflexion hooking part H, and the dorsiflexion rotation of the grip body 5 becomes more reliable and easy.

Further , the grip body 5 is rotatably fitted to the manual operation tool 2, and a rotation sensor 9 that detects the rotation between the grip operation body 5 and the manual operation tool 2 is provided below the grip body 5. Therefore, the turning operation of the grip body 5 can be detected easily and reliably.

It is the front view seen from the operator which shows embodiment of this invention. It is the same perspective view. It is the same rear view. It is a right view of a grip. It is the left side view. It is the same top view. FIG. 6 is a sectional view taken along line XX of FIG. 5. FIG. 6 is a cross-sectional view taken along line YY in FIG. 5. FIG. 6 is a sectional view taken along line ZZ in FIG. 5. It is a right view of the mounting state of a grip. It is the top view applied to the manual operation tool of a backhoe control part. It is the whole backhoe side view. It is explanatory drawing which shows the movement of a dozer.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
10-13, the backhoe 21 is illustrated as an industrial machine. The backhoe 21 is provided with a swivel base 24 on a traveling machine body 23 having a left and right crawler type traveling unit 22 so as to be rotatable about a vertical axis, a dozer device 26 is supported on a front portion of the traveling machine body 23, and a control unit 27 is mounted on the swivel base 24. Is provided.

  The control unit 27 includes a working unit for causing the swivel base 24 to perform a swiveling operation, a boom 31 to move up and down, an arm 32 to swing, and a bucket 33 to crawling and dumping. Operating devices 34 and 35 are arranged, a traveling control device 37 and the like are arranged in front of the floor 36, and the manual operation tool 2 (operating lever) for operating the blade 26A of the dozer device 26 in front of the driver's seat 28 is A grip 1 constituting the grip operation unit 3 is provided.

  The manual operation tool 2 has a grip 1 attached to the upper end of the lever rod 2a, and swings the grip 1 back and forth to move the blade 26A of the dozer device 26 up and down (direction α in FIG. 13). By rotating the grip 1 around the lever rod 2a, the blade 26A of the dozer device 26 is operated at an angle (back and forth movement of the left and right sides of the blade 26A shown in the β direction in FIG. 13), and the top switch is moved with the thumb. By performing the pushing operation, the blade 26A is tilted (the vertical movement of the left and right sides of the blade 26A shown in the γ direction in FIG. 13), and the push button on the back (viewed from the operator seated on the driver's seat 28) is pushed. By performing a push operation with the index finger, a shifting operation is performed to switch the traveling speed of the backhoe 21 between high and low.

  1 to 10, a grip 1 is rotatably fitted to a lever rod 2 a of a manual operation tool 2 via a support shaft body 40, and a palm and a long finger (index finger, middle finger, ring finger, and little finger) The grip body 5 to be gripped by the head, the seesaw type switch 6 which is disposed on the top portion A of the grip body 5 and can be operated with the thumb (mother finger), and the upper front portion of the grip body 5 (sitting on the driver's seat 28) The push button 7 is arranged on the back side as viewed from the operator and operated by the index finger or the middle finger, and is provided between the lower part of the grip body 5 and the support shaft body 40, and the grip body 5 is rotated. And a rotation sensor 9 for detecting.

The grip 1 is for right-hand use, and is disposed in a forward tilting posture from the lower part to the upper part. The grip body 5 is formed of a synthetic resin and divided into left and right parts. While being stopped, it is fitted to the support shaft body 40 so as to be rotatable about its axis.
As shown in FIGS. 4 and 7 to 10, the support shaft body 40 is fitted to a square material (hexagonal) manual operation tool 2 and fixed with a screw 44, and has a return spring 41 on the upper part thereof, and a lower part. A pair of left and right rotation sensors 9 are attached to the left and right.

  The return spring 41 has a coil portion located in the support shaft body 40, both ends thereof projecting radially outward from the grooves 40 a of the support shaft body 40, and the grip body 5 is engaged with both projecting ends. When 5 rotates in one direction, one end of the return spring 41 moves within the range of the groove 40a of the support shaft body 40. The grip body 5 has a rotation angle set within a movable range of the end of the return spring 41, and can be returned from the rotation position to the original position by the restoring force of the return spring 41.

The grip body 5 has an operating piece 42 that selectively contacts the left / right rotation sensor 9 at the lower portion, and by rotating, one operating piece 42 operates the left / right one rotation sensor 9, The rotation direction can be detected.
The screw 44 is concealed by a lid 45 provided on the grip body 5, and the grip body 5 is attached to and detached from the manual operation tool 2 together with the support shaft body 40 by removing the screw 44 by removing the lid 45. be able to.

  The grip body 5 generally has a head portion 5c having a top portion A having a spherical shape, a body portion 5d having a substantially elliptical cross section (circular or oval shape) having a diameter smaller than that of the head portion 5c, and a lower portion having a body portion 5d. It has an enlarged cylindrical portion 5e with a larger diameter and a substantially circular cross section, and is connected by an inclined surface N that is widened (tapered) from the trunk portion 5d to the enlarged cylindrical portion 5e. Shape.

The grip body 5 has a shape in which the thumb ball abuts against the inclined surface N and the thumb and index finger can be turned to the head 5c in a state where the body portion 5d is gripped by the palm and the middle finger. The thumb fingertip is in a position where it can be reached, and the push button 7 is in a position where the fingertip of a long finger can reach.
The proper position for gripping the grip body 5 is generally a position where the abdomen on the distal end side from the first joint of the thumb is placed on the switch 6, although it depends on the size of the hand of the operator. The palm is placed on the torso 5d and the thumb and long fingers are rolled and turned. The upper part of the palm and the base of the index finger are placed on the head 5c, and the lower side of the thumb ball is on the inclined surface N. It is a position where the wrist comes into contact and the wrist overlaps with the enlarged cylindrical portion 5e.

  The grip body 5 is ergonomically shaped so that it can be gripped most easily when gripped at an appropriate position and the hand part fits comfortably. When only moving up and down frequently, in order to increase the lever ratio and reduce the operating force, the head 5c of the grip body 5 may be covered or operated by holding the head 5c. .

  The grip body 5 has a thumb spherical surface B on the front side (a surface visible to the operator) that contacts the thumb ball from the body 5d to the head 5c, and a right side surface that contacts the middle part of the palm and the little finger ball. Between the palm surface C, the long finger surface D on the back side (the surface that cannot be seen by the operator, the front surface in the running direction), and the tip of the long finger and the thumb ball when gripped by the hand And an open surface E on the left side surface on which the thumb can be placed.

1, 2, and 6, the lower surface of the thumb spherical surface B of the grip body 5 comes into contact with the thumb ball, and the upper part comes into contact with the thumb when the switch 6 is operated. Of the head 5c, only the part corresponding to the upper part of the thumb spherical surface B is not spherical but is cut out, and the thumb spherical face B changes from a convex shape to a concave shape in a horizontal section from the bottom to the top. . This is shown by comparison with a two-dot chain line orthogonal to the center line S in FIG.

The upper surface of the thumb spherical surface B has an arc concave shape, so that a shallow groove-shaped thumb guide portion Ba is formed along the belly of the thumb. This thumb guide portion Ba is continuous so that the bottom of the shallow groove is substantially flush with the surface of the pivot portion of the operating body 6a of the seesaw type switch 6.
Since the upper surface of the thumb spherical surface B is a shallow groove with an arcuate concave shape, the first and second joints of the thumb can be contacted in a wider range, and the thumb 6 does not feel uneven in the longitudinal direction. The body 6a can be reached.

A flat surface Aa formed on the top portion A of the grip body 5 surrounds the switch 6 to enable reliable operation of the operating body 6a, and the front surface (upper surface) of the switch case 6b is a flat surface Aa before the front. Therefore, the thumb arranged in the thumb guide portion Ba can be smoothly extended to the surface of the operation body 6a.
The top portion A of the grip body 5 is formed in a substantially spherical surface Ab around the flat surface Aa, and the surface of the switch case 6b of the switch 6 is disposed within the extension of the substantially spherical surface Ab.

In the upper part of the thumb ball B, the hand enters the switch 6 between the thumb guide portion Ba and the open surface E and between the thumb guide portion Ba and the palm surface C (crossing over the switch operation range). ) Is formed to give resistance.
The raised portion includes a first raised portion Bb between the thumb guide portion Ba and the open surface E, and a second raised portion Bc between the thumb guide portion Ba and the palm surface C.

  The first raised portion Bb gradually rises from the lower side to the upper side on the thumb spherical surface B, and is highest in the vicinity of the lower side of the switch 6, and has a first ridge line L1 substantially parallel to the center line S. This first raised portion Bb gives resistance when moving from the state where the thumb is placed on the open surface E to the thumb guide portion Ba, recognizes the sense of overcoming transition when performing consciously, and performs it unconsciously. It is possible to prevent intrusion by recognizing the sense of intrusion at the time.

  The second raised portion Bc rises gradually from the lower side to the upper side on the thumb spherical surface B, and is the highest in the vicinity of the lower side of the switch 6. The second ridge line is substantially symmetrical with the center line S as a boundary. L2. The second raised portion Bc covers the switch 6 between the upper part of the thumb ball or between the thumb ball and the forefinger, particularly when the user grips the top A of the grip body 5 with his hand. In addition to recognizing that these parts are covered by the switch 6, a resistance is given to the switch 6 so as to call attention.

The first ridge line L1 on the open surface E side and the second ridge line L2 on the palm surface C side are formed so that the distance from the lower side to the upper side increases as the distance from the lower part increases to the upper part. Further, the operation body 6a may be pushed sufficiently at the left and right positions.
1, 2, 7, and 8, a palm flexion pressing portion G is formed between the thumb spherical surface B and the palm surface C below the trunk portion 5 d of the grip body 5. This palm flexion pressing portion G is formed by flattening the lower portion of the thumb spherical surface B and forming a corner portion between the thumb spherical surface B and the palm surface C with a small radius R so that it can be removed from the axial center of the grip body 5. It is a part which made the distance to a corner part project apart from the distance to the thumb spherical surface B and palm surface C (this is two points centering on the axis of the support shaft 40 in FIG. 7) This is shown in comparison with a chain line circle.) When the wrist is bent palm (twist the hand to the palm side), the thumb ball (especially the right outside of the thumb ball) comes into contact and presses it. It is possible to transmit palm turning force to the grip body 5.

  The palm flexion pressing portion G is connected to the second raised portion Bc between the thumb guide portion Ba and the palm surface C substantially linearly and integrally in the vertical direction, and therefore the lower portion of the second raised portion Bc is also connected. This constitutes the palm flexion pressing portion with which the thumb ball abuts. In particular, when the upper portion of the grip body 5 is gripped, the second raised portion Bc serves as a palm bending pressing portion, and the rotational force due to palm bending from the hand to the grip body 5 can be transmitted.

2 to 5, 7, and 8, the long finger surface D of the grip body 5 has an upper portion that bulges forward from the lower portion, and a push button 7 that is operated with an index finger or middle finger is provided on the upper portion. Yes. A raised fender part Da is formed around the upper push button, and the height of the fender part Da is higher than or substantially the same as the push surface 7 a of the push button 7.
On the long finger surface D, a dorsiflexion hooking portion H that is long in the vertical direction along the center line S is formed. The dorsiflexion hook H is integrally connected to the lower part of the fender part Da, and the width gradually decreases from the upper part to the lower part.

  This dorsiflexion hook H is formed by forming a long recess 39 in the vertical direction between the long finger surface D and the open surface E, as is apparent from the two-dot chain line circle shown in FIG. In particular, a long ridge is formed on the long finger surface D in the vertical direction, and when the fingertip of the long finger is placed on the recess 39, the dorsiflexion hooking portion H, which is the bulge, is hooked with the long finger. When the wrist is bent mainly by hooking a long finger such as the middle finger or the ring finger (the hand is bent toward the back of the hand), the rotational force of the dorsiflexion can be transmitted to the grip body 5.

The grip body 5 has an enlarged cylinder portion 5e which incorporates a left / right rotation sensor 9 at the lower portion and protects it from rainwater. The outer peripheral surface of the enlarged cylindrical portion 5e is connected to the lower surface of the thumb spherical surface B, the palm surface C, the long finger surface D, and the open surface E of the trunk portion 5d by an inclined surface N.
This inclined surface N is an inclined surface having a relatively steep angle from the middle portion of the palm surface C to the middle portion of the open surface E through the long finger surface D in the circumferential direction of the enlarged cylinder portion 5e. From the middle part to the middle part of the open surface E through the thumb spherical surface B is an inclined surface having a relatively gentle angle. In particular, the thumb inclined surface Nb below the thumb spherical surface B is below the long finger surface D. The front inclined surface Nd on the side and the inclined surface Ne on the lower side of the open surface E are formed at a smooth and gentle small inclination angle.

Further, since the thumb inclined surface Nb has a gentle small inclination angle, the thumb inclined surface Nb has penetrated to the midway portion in the vertical direction of the enlarged cylindrical portion 5e, and the lower front tilt of the long finger surface D is reached. The vertical width gradually increases from the surface Nd to the lower thumb inclined surface Nb of the thumb spherical surface B through the lower palm inclined face Nc of the palm face C.
The grip 1 is operated and functions as follows.

  The grip 1 constitutes a grip operation unit 3 of a manual operation tool 2 that is an operation lever. For example, the grip 1 is gripped by the right hand and swings back and forth together with the operation lever, and the wrist is bent (twist the hand to the palm side). ) Or dorsiflexion (turning the hand toward the back of the hand) to rotate the operation lever. If the switch 6 is provided, the switch is operated with the right thumb and the push button 7 is provided. Operate with your right long finger.

The grip body 5 has a thumb spherical surface B, a palm surface C, a long finger surface D, and an open surface E, and has a large-diameter enlarged cylinder portion 5e that protects the rotation sensor 9 in the lower portion, When the switch operation is performed, the body ellipse is generally gripped while rounding the thumb, palm, and long fingers, and the wrist of the thumb ball comes into contact with the enlarged cylindrical portion 5e. It becomes a state.
In this grip state, the thumb ball is brought into contact with the thumb ball B, the middle part of the palm and the little finger ball are brought into contact with the palm surface C, the long finger is brought into contact with the long finger surface D, and the thumb and thumb are brought into contact with the open surface E. The tip of the ball and the long finger is turned, and the grip ball 5 is gripped by the thumb ball and the long finger ring finger and the little finger, and the thumb, index finger and middle finger are separated from the grip body 5 and the switch 6 And it will be in the state in which free movement is possible so that operation of pushbutton 7 can be performed.

The grip body 5 is rotatably fitted to the manual operation tool 2, and can be rotated by palm and dorsiflexion of the wrist. Is detected by a rotation sensor 9 built in the enlarged cylindrical portion 5e.
In a state where the grip main body 5 is gripped with the thumb ball of the right hand, the ring finger of the long finger, and the little finger, when the operation lever is operated to swing back and forth, the wrist of the thumb ball comes close to and away from the enlarged cylindrical portion 5e. An inclined surface N is formed between the outer peripheral surface of the enlarged cylindrical portion 5e and the lower portion of the thumb spherical surface B. The lower thumb finger inclined surface Nb of the thumb spherical surface B is below the long finger surface D. It is formed at a gentle small inclination angle than the front inclined surface Nd on the side, and there is no sense of incongruity even if the wrist ball comes close to the wrist, so that the operation lever can be easily swung back and forth without feeling resistance. .

In addition, the palm flexion pressing portion G between the thumb spherical surface B and the palm surface C of the grip body 5 is in contact with the right outer side portion of the thumb ball. When the bending pressure part G is pressed to transmit the palm bending torque to the grip body 5, the dorsiflexion hooking part H of the long finger surface D of the grip body 5 is caught with the long finger, and when the right wrist is bent back, A dorsiflexion power is transmitted to the grip body 5 via the dorsiflexion hook H with a long finger.

In the present invention, the shape of each member and the positional relationship between the front, back, left, right, and top are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the grip 1 may be applied not only to an operation lever of a backhoe dozer but also to an operation lever of a tractor or other construction machine or civil engineering machine, or may be formed for the left hand in the shape of a left-right hand.

Further, the grip 1 may be one without the switch 6 and / or the push button 7, and the switch 6 may be a push button.
It is also possible to cause the grip 1 rotating around the lever rod 2a to perform a tilting operation of the blade 26A of the dozer device 26 or to perform a shifting operation for switching the traveling speed of the backhoe 21 between high and low.

DESCRIPTION OF SYMBOLS 1 Grip 2 Hand operation tool 2a Lever rod 3 Grip operation part 5 Grip main body 5c Head part 5d Trunk part 5e Expansion cylinder part 6 Switch 7 Push button 7a Push surface 9 Rotation sensor 21 Backhoe 26 Dozer device 40 Support shaft body B Mother finger Spherical surface Ba Thumb guide portion Bc Second raised portion C Palm surface D Long finger surface Da Guard surface E Open surface G Palm flexion pressing portion H Back buckling hook portion N Inclined surface Nb Thumb inclined surface Nc Palm inclined surface Nd Front inclined surface S Center line

Claims (5)

The grip operation part (3) of the hand operation tool (2) is configured, the grip body (5) gripped by the palm and the long finger, the thumb spherical surface (B) contacting the thumb ball, and the palm of the palm The palm surface (C) that contacts the middle part and the little finger ball, the long finger surface (D) that contacts the long finger, and the thumb positioned between the tip of the long finger and the thumb ball when gripped by the hand A grip having an open surface (E) that can be arranged,
Palm flexion that transmits torque to the grip body (5) by pressing with the thumb ball when the wrist is bent between the thumb spherical surface (B) and the palm surface (C) of the grip body (5). A dorsiflexion hook that forms a pressing part (G) and hooks the long finger to the long finger surface (D) of the grip body (5) to transmit the rotational force to the grip body (5) when the wrist is bent back. (H) is formed,
The palm flexion pressing portion (G) has a longest distance from the axis center of the grip body (5) to the palm flexion pressing portion (G), and the thumb spherical surface (B) and the open surface (E) from the axis center. It is a part that protrudes to become larger than the longest distance to the corner part between,
The dorsiflexion hook (H) is formed by forming a recess (39) that is recessed toward the inside of the grip body (5) between the long finger surface (D) and the open surface (E). (39) A grip characterized by being a raised portion formed adjacent to and adjacent to (39).   A portion of the thumb spherical surface (B) continuous to the palm flexion pressing portion (G) is formed flat, and a corner between the flat portion of the thumb spherical surface (B) and the palm surface (C). The radius of the palm bending press part (G) which is a part is formed to be smaller than the corner part between the thumb spherical surface (B) and the open surface (E). Grip described in. Before Symbol grip body (5) is fitted rotatably through a support shaft with respect to the lever rod (2a) of the manual tool (2) (40), the support shaft body (40) The grip according to claim 1 or 2 , wherein a rotation sensor (9) for detecting the rotation of the grip body (5) is provided at a lower portion. A switch (6) that can be operated with a thumb is provided at the top (A) of the grip body (5), and when the switch (6) is operated on the upper surface of the thumb spherical surface (B) of the grip body (5), A shallow groove-shaped thumb guide portion (Ba) extending along the stomach is formed in a vertically long direction toward the switch (6),
A raised portion (Bc) is formed between the thumb guide portion (Ba) and the palm surface (C) so as to resist the penetration of the hand into the switch (6) in the vertical direction along the thumb guide portion (Ba). The grip according to any one of claims 1 to 3, wherein the raised portion (Bc) and the palm bending pressure portion (G) are connected to each other.   The grip body (5) has a push button (7) operated by an index finger or a middle finger on the upper part of the long finger surface (D), and is raised around the push button on the upper part of the long finger surface (D). The fender part (Da) is formed, The lower part of this fender part (Da) and the upper part of a dorsiflexion hooking part (H) are connected, The any one of Claims 1-4 characterized by the above-mentioned. The grip described.

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