JP4394150B2 - Rotating case with feeding mechanism for nylon cutter of mower - Google Patents

Description

  The present invention relates to a rotating case provided with a feeding mechanism of a nylon cutter (nylon cord) of a mower.

  Conventionally, in the case of a rotary case of a mower equipped with a nylon cutter, if this nylon cutter becomes worn and shortens due to wear, making it difficult to cut the grass, the bobbin (winding mechanism) in this rotary case An operation to feed out a spare nylon cutter is required. In this case, there are known a structure in which the bobbin is automatically fed out using this rotation when the bobbin is rotated, and a structure in which the bobbin is rotated out by manual operation. A typical example will be described using the following prior art.

  References (1) and (2) are structures for automatically feeding out the bobbin using this rotation when the bobbin rotates. This document (1) is a “cord feeding mechanism in a cutting blade device of a cord type mower” disclosed in Japanese Patent Laid-Open No. 6-30626. The structure of the present invention is such that a first locking claw and a second locking claw project from the front and back surfaces of the upper and lower flanges of the bobbin, are loosely fitted into the bobbin, and are slidably provided on the housing. A switching member provided with a striking portion, a latching claw provided on the outer peripheral wall of the switching member, a housing for biasing the switching member, and a spring provided between the cover, The switching member is prevented from being pulled out by the cover, and the striking portion of the switching member protrudes from the cover. Then, the hitting portion is inserted into the cover via the hitting of the hitting portion, and the bobbin is rotated via the engagement release of the second locking pawl and the locked pawl, while the bobbin is rotated. The bobbin can be stopped from rotating through the engagement between the one locking claw and the locked claw, and the nylon cutter can be fed out during the engagement from the moment of releasing the engagement. A feature of the present invention resides in that the feeding length is adjusted through the feeding of the nylon cutter and the repetition of the striking operation using the difference in rotational speed between the bobbin and the switching member. Reference (2) is “a cord feeder of a brush cutter and a cord routing method in the cord feeder” of JP-A-2005-124501. In the structure of the present invention, a push claw is provided on the inner surface of the upper wall of the housing (case lid), and an engaging recess is provided on the bottom wall of the cover (case body) so as to be movable between the housing and the cover. A forward claw and an engaging convex portion are provided on the front and back surfaces of the upper and lower walls of a bobbin (reel member) provided and provided with a pressing portion, and a spring for biasing the pressing portion is provided between the housing and the bobbin. The bobbin pressing portion is provided so as to protrude from the cover. Then, the hitting portion of the pressing portion is inserted into the cover through the striking of the pressing portion, the engagement claw and the engaging projection are disengaged, and the bobbin is rotated while the push claw and the forward claw are rotated. The bobbin is rotated through the engagement with the nylon cutter, and the nylon cutter can be fed out during the engagement from the moment when the engagement is released. A feature of the present invention is that since a nylon cutter insertion hole is opened in the dish-shaped cover, dust, dirt, and grass do not invade into the outer case (configured by the case main body and the case lid). .

  And there exists literature (3) as a structure which rotates a bobbin by manual operation and pays out. This document (3) is “a manual cord feeding mechanism in a cutting blade device of a cord type mower” disclosed in Japanese Patent Application Laid-Open No. 2006-14686. In the structure of the present invention, an interlocking concavo-convex portion and a stopper concavo-convex portion are provided on the surface of the upper collar piece of the bobbin, and a manual operating body engaged with and disengaged from the stopper concavo-convex portion is inserted and removed in the radial direction of the bobbin. The manual operating body is configured to be urged in the radial direction via a spring, and the bobbin is rotatably provided between the housing and the cover. The bobbin is rotated and stopped by pressing (insertion) and releasing (returning), and the nylon cutter can be fed out by this rotation and rotation stop. A feature of the present invention resides in that the feeding and / or feeding length of the nylon cutter is adjusted through the operation of the manual operating body.

JP-A-6-30626 JP-A-2005-124501 JP 2006-14686

  The document (1) is a structure in which a switching member provided with a striking portion that is loosely fitted in a bobbin and slidably provided on a housing is provided. For example, the number of parts is increased, and the labor for this assembly is increased. And / or have problems such as requiring skill. Further, the bobbin is stopped and released (rotated) by a slight movement of the bobbin in the axial direction, and there is room for improvement in order to achieve reliable operation.

  Reference (2) is a structure in which the rotating shaft is extended to the deep case body, and it is necessary to solve the problem of blinding of the outer case, which leads to a complicated structure and handling during use. It is necessary to consider it, and it has problems such as being troublesome. In the present invention, the bobbin (reel member) is stopped and rotated through the engagement with the engaging projections and depressions and the engagement (engagement) of the forward claws and push claws. It is conceivable that there is little room for the pitch, and extra time and time are required, and there is room for improvement in handling.

  Furthermore, the document (3) is a structure in which the mower is stopped, the bobbin is rotated through the control of the manual operating body, and the nylon cutter mounted on the bobbin is fed out. There is room for improvement, such as the need, experience in handling the mower, and the need for new knowledge. Especially, it is a structure that feeds out the nylon cutter through the mower stoppage one by one, and it may be difficult to respond in an emergency, and if it fails to stop, it will cause an unexpected accident and become a problem There are problems to be improved.

  The invention of claim 1 has a structure in which the nylon cutter can be fed out for a predetermined length while rotating the mower, and at that time, the bobbin is separated from the cover, and immediately after the separation, the structure is locked to the housing. It is intended that the nylon cutter can be fed out with a predetermined length, surely and smoothly. In addition, the invention of claim 1 is provided to lock the first and second locked protrusions provided on the upper and lower flanges of the bobbin with the first and second locking protrusions provided on the housing. The structure is designed to stop and stop the rotation of the bobbin through the release of the lock. The nylon cutter can be reliably and smoothly fed out, and the above-mentioned nylon cutter can be reliably and smoothly moved to a predetermined length. In addition, it is intended to enable delivery. Furthermore, the invention of claim 1 adopts a structure in which the spring can be locked to the housing and the bobbin, and intends to achieve a reliable and smooth insertion and return of the bobbin.

According to a first aspect of the present invention, there is provided a hook-shaped housing provided with an opening in the upper wall that allows insertion of the rotary shaft of the mower, and a hook having a curved portion on one side of the peripheral wall. A pair of pieces are provided, and a guide piece for inserting a nylon cutter is fitted into a slit provided between the hook pieces, and a plurality of first locking protrusions are bulged on the inner surface of the upper wall. And
The bobbin which is built in the housing and is equipped with the nylon cutter is provided with a cylindrical main body portion, and upper and lower hook pieces provided on the cylindrical main body portion and formed by bulging the first and second locked protrusions. On the inner surface of the pressing projection provided at the lower part of the cylindrical main body part, the first ring wall provided in an annular shape from the inner surface side of the cylindrical main body part toward the axis , A plurality of seating surface pieces provided between the first ring wall and the inner surface of the cylindrical main body portion, and a second ring member provided in an annular shape on the inner surface of the first ring wall. A structure in which a ring wall and a plurality of protruding pieces provided between the second ring wall and the first ring wall are sequentially provided,
A dish-shaped cover that is locked to the hooking piece of the housing and covers the housing is provided, and the cover has a notch hole into which the hooking piece opened on the outer peripheral surface of the wall body is inserted. A plurality of projecting pieces provided between the cutout holes and attached to the outer side of the peripheral wall of the housing; an opening into which the bobbin projecting portion provided on the wall body is inserted; and an inner wall surface thereof Consisting of a plurality of second locking protrusions bulging
The housing, upon mounting the cover, projection of the bobbin than the opening of the cover is protruding, seating surface of the spring to the seat surface strip of the bobbin while being contact, the protrusion of the bobbin On the outside, the inner surface side of the spring is attached , and this spring is configured to be mounted between the housing and the bobbin ,
With the urging force of the spring, the second locking ridge and the second locking ridge ensure a locking relationship, and when the urging force of the spring is compressed, the bobbin moves, The first locked ridge and the first locking ridge secure a locking relationship,
A nylon cutter for a grass cutter in which the hook piece is detached from the stepped portion of the notch hole and the cover can be removed from the housing via the curved surface portion on one side of the hook piece. It is a rotation case provided with a feeding mechanism.

  The invention of claim 2 is intended to achieve the object of claim 1, to provide a housing having an optimal structure for achieving this object, and the like.

Claim 2 is a rotating case provided with the nylon cutter feeding mechanism of the mower according to claim 1,
The housing includes an inner cylinder that includes a fitting portion that surrounds an opening provided in the upper wall of the housing and that is secured to the rotating shaft that is suspended from the inner surface of the upper wall outside the opening. Surrounding the cylinder, an intermediate cylinder hanging from the inner surface of the upper wall, and a seat cylinder surrounding the intermediate cylinder and hanging from the inner surface of the upper wall are sequentially provided, and the inner surface of the spring is attached to the intermediate cylinder, The spring seating surface is configured to abut against the seat tube, and a plurality of first locking protrusions are provided between the seat tube and the peripheral wall of the housing and in the radial direction of the inner surface of the upper wall. It is the rotation case provided with the feeding mechanism of the nylon cutter of the mower made into the structure provided.

  The invention of claim 3 is intended to achieve the object of claim 1 and to provide a housing having a structure optimal for achieving the object.

Claim 3 is a rotating case provided with a nylon cutter feeding mechanism of the mower according to claim 1,
The hooking piece is provided extending in the radial direction of the housing, a curved portion is formed on one side of the hooking piece, and the cover is detachable via the curved portion. This is a rotating case equipped with a nylon cutter feed mechanism.

  The invention of claim 4 is intended to achieve the object of claim 1, to provide a bobbin having a structure optimal to achieve this object, and the like.

Claim 4 is a rotating case provided with a nylon cutter feeding mechanism of the mower according to claim 1,
The bobbin is a rotating case provided with a nylon cutter feeding mechanism of a mower that has a configuration in which a concave hole that can be locked to the inner side of the free end of the nylon cutter is opened only on the lower collar piece of the bobbin.

  The invention of claim 5 is intended to achieve the object of claim 1, to provide a bobbin having a structure optimal for achieving this object, and to prevent the nylon cutter from being fused.

Claim 5 is a rotating case provided with a nylon cutter feeding mechanism of the mower according to claim 1,
This bobbin is a rotating case provided with a feeding mechanism of a nylon cutter of a mower that has a structure in which a plurality of through holes for air circulation are opened in a cylindrical main body portion.

According to the first aspect of the present invention, a hook-shaped housing provided with an opening in the upper wall that allows insertion of a rotary shaft of a mower and secured to the rotary shaft has a curved portion on one side on the peripheral wall. A configuration in which a pair of pieces are provided, a guide piece for inserting a nylon cutter is fitted into a slit provided between the hook pieces, and a plurality of first locking protrusions are bulged on the inner surface of the upper wall. age,
The bobbin, which is housed in the housing and equipped with a nylon cutter, is composed of a cylindrical main body, and upper and lower flanges that are provided on the cylindrical main body and are formed by bulging the first and second locked protrusions. A first ring wall provided in an annular shape from the inner surface side of the cylindrical main body portion toward the axis from the inner surface side of the cylindrical main body portion; A plurality of seating surface pieces provided between the inner surface of the cylindrical main body portion, a second ring wall provided inside the first ring wall and annularly on the inner surface, and a second ring wall A configuration in which a plurality of protruding pieces provided between the first ring wall and the first ring wall are sequentially provided,
A dish-shaped cover that is locked to the housing hook and covers the housing is provided. The cover has a notch hole into which the hook piece opened on the outer peripheral surface of the wall body is inserted, and a notch hole. A plurality of protrusions attached to the outside of the peripheral wall of the housing, an opening into which the protrusion of the bobbin provided on the wall body is inserted, and a plurality of second latches bulging on the inner wall surface Composed of ridges,
The housing, when worn the cover protrusion of the bobbin than the opening of the cover is protruded, together with the seating surface of the spring seat surface piece of the bobbin is contact, the bobbin projecting piece on the outside, the spring The inner surface side is attached, and the spring is attached between the housing and the bobbin .
With the biasing force of the spring, the second latching ridge and the second latching ridge ensure a locking relationship, and when the spring biasing force is compressed, the bobbin moves and the first latching ridge The locking ridge and the first locking ridge secure the locking relationship,
Provided with a mechanism for feeding the nylon cutter of a mower that the hook piece is detached from the stepped portion of the notch hole and the cover can be removed from the housing through the curved surface portion on one side of the hook piece. It is a rotating case.

  Accordingly, the first aspect of the present invention has a structure in which the nylon cutter can be extended for a predetermined length while rotating the mower, and at that time, the bobbin is separated from the cover, and immediately after the separation, the structure is locked to the housing. The nylon cutter has features such as being able to be fed out with a predetermined length, surely and smoothly. The first aspect of the present invention also relates to the engagement and engagement between the first and second locked protrusions provided on the upper and lower flanges of the bobbin and the first and second locking protrusions provided on the housing. Bobbin rotation and this rotation stop can be achieved through the release of the stop, and it is possible to reliably and smoothly feed out the nylon cutter, and the above-mentioned nylon cutter has a predetermined length and surely and smoothly. It has the feature that it can be fed out. Furthermore, claim 1 employs a structure that allows the spring to be locked to the housing and the bobbin, and has an advantage that the bobbin can be securely and smoothly inserted and returned.

Invention of Claim 2 is a rotation case provided with the feeding mechanism of the nylon cutter of the mower of Claim 1,
The housing surrounds an opening provided in the upper wall of the housing, and an inner cylinder having a fitting portion fixed to a rotating shaft suspended from the inner surface of the upper wall outside the opening, and the inner cylinder, An intermediate cylinder suspended from the inner surface of the upper wall and a seat cylinder surrounding the intermediate cylinder and suspended from the inner surface of the upper wall are sequentially provided, the inner surface of the spring is attached to the intermediate cylinder, and the spring seat surface is in contact with the seat cylinder. Provided with a mechanism for feeding a nylon cutter of a mower having a structure and a plurality of first locking protrusions provided between the seat tube and the peripheral wall of the housing and in the radial direction of the inner surface of the upper wall It is a rotating case.

  Accordingly, the second aspect has features such that the object of the first aspect can be achieved and a housing having a structure optimal for achieving the object can be provided.

Invention of Claim 3 is a rotation case provided with the feeding mechanism of the nylon cutter of the mower of Claim 1,
The hook piece is provided extending in the radial direction of the housing, a curved portion is formed on one side of the hook piece, and the cover is removable via the curved portion of the nylon of the mower. It is a rotating case provided with a cutter feeding mechanism.

  Accordingly, the third aspect has features such that the object of claim 1 can be achieved, and a housing having an optimum structure for achieving the object can be provided.

Invention of Claim 4 is a rotation case provided with the feeding mechanism of the nylon cutter of the mower of Claim 1,
This is a rotating case provided with a nylon cutter feeding mechanism of a mower that has a configuration in which a concave hole that can lock the inside of the free end of the nylon cutter is provided only on the lower collar piece of the bobbin.

  Therefore, claim 4 has features such that the object of claim 1 can be achieved, and a bobbin having an optimum structure for achieving the object can be provided.

Invention of Claim 5 is a rotation case provided with the feeding mechanism of the nylon cutter of the mower of Claim 1,
This is a rotating case provided with a feeding mechanism of a nylon cutter of a mower having a configuration in which a plurality of through holes for air circulation are opened in a cylindrical main body portion of a bobbin.

  Accordingly, the fifth aspect has features such that the object of claim 1 can be achieved, a bobbin having an optimum structure for achieving the object, and a bobbin capable of preventing fusion of the nylon cutter can be provided.

  An example of the present invention will be described.

  Referring to the drawings, FIG. 1 is a scaled perspective view showing the entire mower, FIG. 2 is a plan view of a rotating case, and FIG. 3A is a sectional view of the rotating case, including a housing, bobbin, cover, In addition, a cross-sectional view showing the correlation of the springs, and FIG. 3-2 is a cross-sectional view showing the movement (rise) of the bobbin of FIG. 3-1. 4-1 is a perspective view of the housing as viewed from the back, FIG. 4-2 is a back view of the housing, FIG. 5-1 is a perspective view showing a correlation between the bobbin, the cover, and the nylon cutter, and FIG. FIG. 6A is a perspective view of the bobbin, FIG. 6B is a plan view of FIG. 6A, and FIG. 6C is a rear view of FIG.

  Reference numeral 1 denotes a housing in which an upper wall 1a is provided with an opening 2 allowing insertion of the rotary shaft M1 of the mower M. The housing 1 has a bowl shape having a fitting portion 3 fixed to the rotary shaft M1. The housing 1 has the upper wall 1 a and an annular peripheral wall 1 b, and the lower side of the peripheral wall 1 b is an opening 4. In addition, the peripheral wall 1b is provided with hook pieces 5 and 5 via a pair of kerfs 100 (slits), 100 [one symbol in the case of a pair], and the pair of kerfs 100. -It is a structure which gives elasticity to this hook piece 5 via the length and / or raw material. In addition, the guide pieces 7 and 7 are fitted on the peripheral wall 1 b and preferably between the hooking pieces 5 through the slits 101. Further, the inner surface 1c of the upper wall 1a of the housing 1 is provided with a fitting portion 3 fixed to a rotating shaft M1 suspended from a portion surrounding the opening 2 (a portion corresponding to the outside of the opening 2). A cylinder 8, an intermediate cylinder 10 that surrounds the inner cylinder 8 and hangs down from the inner surface 1 c, and a seat cylinder 11 that surrounds the intermediate cylinder 10 and hangs down from the inner surface 1 c are sequentially provided, and a spring is provided outside the intermediate cylinder 10. 15, the seating surface 1500 of the spring 15 is in contact with the seat tube 11, and the inner surface 1 c is formed between the outer surface of the seat tube 11 and the inner surface of the peripheral wall 1 b of the housing 1. In the radial direction, a plurality of first locking ridges 12 are provided.

  The housing 1 is formed with a space 13 in which a bobbin 20 in which a nylon cutter B can be fitted is provided. And the guide piece 14 which protects the said hook piece 5 each bulges and forms in the surrounding wall 1b. In the figure, reference numeral 16 denotes a bulging piece provided on the inner surface side of the peripheral wall 1b protecting the slit 101.

  The bobbin 20 includes upper and lower flanges 21 and 22 and a cylindrical main body 23, and the upper and lower flanges 21 and 22 include a plurality of first and second locked protrusions 25. , 26 are formed to bulge, and the lower collar piece 22 is formed with two concave holes 27 that can be locked to the inner ends of the free ends B1, B2 of the nylon cutter B, and the bobbin 20 A pressing projection 28 is formed. The bobbin 20 is provided with an intermediate hook piece 29, the intermediate hook piece 29 is used to feed the nylon cutter B in two directions, and the intermediate hook piece 29 is hooked at an intermediate position in the circumferential direction. It is desirable to use a structure that locks the middle of the nylon cutter B by using this hook.

  The following members are sequentially provided from the inner surface 23a of the cylindrical main body 23 toward the shaft core on the inner surface 28b of the wall 28a constituting the protrusion 28 of the bobbin 20. An outermost first ring wall 30 erected in an annular shape, a plurality of seating surface pieces 31 provided between the first ring wall 30 and the inner surface 23a of the cylindrical main body 23, and The first ring wall 30 includes a second ring wall 32 provided in a ring shape and a plurality of projecting pieces 33 provided between the first ring wall 30 and the first ring wall 30. The seat surface piece 31 is in contact with the seat surface 1500 of the spring 15, and the inner surface side 15 a of the spring 15 is attached to the outside of the projecting piece 33. And the bobbin 20 are securely attached (deployed), and the urging force of the spring 15 is pressed through the pressing of the projection 28, and the urging force of the spring 15 is restored by the return of the projection 28. It is a structure that can be achieved by using it.

  Further, a plurality of air circulation through holes 34 are formed in the cylindrical main body 23 of the bobbin 20 to prevent the nylon cutter B itself and / or the bobbin 20 from being fused. In particular, rational use in summer and / or tropics.

  40 is a dish-shaped cover that covers the space 13 of the housing 1 and is detachably attached to the housing 1. The cover 40 has a plurality of projecting pieces 41 on a peripheral wall 40 a, and the wall A pair of cutout holes 42 each having a stepped portion 42 a are formed between the outer peripheral edge of the body 40 b and between the projecting pieces 41. Then, the hook piece 5 of the housing 1 is inserted into the notch hole 42, and the claw portion 5b of the hook piece 5 is locked to the stepped portion 42a. Are merged. Further, the bobbin 20 and the spring 15 are mounted between the combined housing 1 and the cover 40, and the protrusion 28 of the bobbin 20 protrudes from the opening 43 of the cover 40, and the seating surface of the bobbin 20 The spring 15 is assembled between the piece 31 and the seat tube 11 of the housing 1. The structure with which the seating surface 1500 of the spring 15 abuts is as described above, and the inner surface side 15a is brought into contact with the outer side of the intermediate cylinder 10 and the projecting piece 33, thereby preventing the blind movement. There are features that can be done. A plurality of second locking protrusions 44 are provided in the radial direction on the inner surface of the wall 40 b of the cover 40 and on the outer side of the opening 43.

  Next, an example of the assembly and use of the present invention will be described. Hooked nylon cutter B is hooked on the middle portion of the middle collar piece 29 of the bobbin 20, and the inner ends of the free ends B1 and B2 are slightly inward. The bobbin 20 is locked in the concave hole 27, and its free ends B1 and B2 are drawn out in the radial direction. The bobbin 20 hooked with the nylon cutter B is attached to the housing 1 attached to the rotary shaft M1 of the mower M, and the free ends B1 and B2 of the nylon cutter B are connected to the rotating case (from the guide piece 7 of the housing 1). The spring 15 is provided between the inner cylinder 8 of the housing 1 and the seat surface piece 31 of the bobbin 20 at the time of being attached and attached in the radial direction (to be described later). Thereafter, the hook 5 of the housing 1 is fitted and locked in the cutout hole 42 of the cover 40. In this operation, the housing 1, the spring 15, the bobbin 20, and the cover 40 (rotating case) are mounted on the tip of the rotating shaft M1. This state is as shown in FIG. 3A. The bobbin 20 is at the lower limit position by the urging force of the spring 15, and the protrusion 28 protrudes from the opening 43 of the cover 40. The second locked protrusion 26 of the mounted bobbin 20 is locked to the second locking protrusion 44 of the cover 40, and the bobbin 20 is synchronized with the rotation of the rotating case. In this state, the rotating shaft M1 is rotated and the rotating case is rotated at a high speed, so that grass, rice, and small trees are cut through the end of the nylon cutter B protruding from the rotating case.

  In the above state, when grass, rice and small trees are cut and the nylon cutter B is worn away, the projecting portion 28 of the bobbin 20 is pressed against the ground while the rotating case is rotated, and the spring 15 is biased. When the spring is released (when the spring 15 is compressed), the second locked protrusion 26 of the bobbin 20 is separated from the second locking protrusion 44 of the cover 40, and at the same time, the bobbin 20 becomes free and its inertial force. Is rotated (turned), and the nylon cutter B is fed out only for the rotated distance. Then, the first locked protrusion 25 of the bobbin 20 is locked to the first locking protrusion 12 of the housing 1, so that the rotation of the bobbin 20 due to the inertial force is stopped and the nylon cutter B is fed out. Ends. The subsequent handling is as described above. In addition, the 1st latching protrusion 12 and the 2nd latching protrusion 44 are the structures from which the phase differs in a rotation direction, and the protrusion 28 was inserted via press only by this phase. In this case, the penetrating force is applied. Therefore, the feeding length of the nylon cutter B can be adjusted by continuing this pressing. Moreover, the 1st to-be-latched protrusion 25 and the 2nd to-be-latched protrusion 26 are structures provided in the same position in a rotation direction.

  Further, in the case of considering the removal of the cover 40 or the removal of the bobbin 20 and / or the replenishment of the nylon cutter B, the cover 40 is rotated and the curved surface portion 5a of the hook piece 5 provided in the housing 1 is used. There is a removal method to do. In this case, by rotating the cover 40 slightly stronger in the circumferential direction, the notch hole 42 provided in the cover 40 slides on the curved surface portion 5 a provided on one side of the hooking piece 5. The hook piece 5 warps and bends in the axial direction, and the claw portion 5b of the hook piece 5 is detached from the stepped portion 42a of the notch hole 42 of the cover 40, and the removal of the cover 40 is completed. . Thereafter, the bobbin 20 is removed and / or the nylon cutter B is replenished as described above. In this case, it is a detaching method for detaching from the notch hole 42 by utilizing the rotation of the cover 40 and the sliding of the curved surface portion 5a, which is useful because it can be easily and easily removed. As another removal method, the hooking piece 5 of the housing 1 is pressed, the hooking piece 5 is forcibly bent, and the claw portion 5b of the hooking piece 5 is stepped on the notch hole 42. A method of detaching from the attachment portion 42a is conceivable. In this case, it is conceivable that force is required for pressing, but there is no problem in removal.

FIG. 1 is a perspective view showing the entire mower. Figure 2 is a plan view of the rotating case FIG. 3-1 is a cross-sectional view of the rotating case, showing a cross-sectional view of the correlation among the housing, bobbin, cover, and spring. 3-2 is a cross-sectional view showing the movement (rise) of the bobbin of FIG. 3-1. FIG. 4-1 is a perspective view of the housing as viewed from the back. Fig.4-2 is the back view of the housing FIG. 5-1 is a perspective view showing the correlation between the bobbin, the cover, and the nylon cutter. 5-2 is a plan view of FIG. Fig. 6-1 is a perspective view of the bobbin FIG. 6B is a plan view of FIG. 6-3 is a rear view of FIG.

DESCRIPTION OF SYMBOLS 1 Housing 1a Upper wall 1b Peripheral wall 1c Inner surface 2 Opening 3 Fitting part 4 Opening 5 Hooking piece 5a Curved part 5b Claw part 7 Guide piece 8 Inner cylinder 10 Intermediate cylinder 100 Cut groove 101 Slit 11 Seat cylinder 12 First latching protrusion Strip 13 Space 14 Guide piece 15 Spring 15a Inner surface 1500 Seat 16 Swelling piece 20 Bobbin 21 Upper collar piece 22 Lower collar piece 23 Cylindrical main body 23a Inner surface 25 First locked protrusion 26 Second locked protrusion Article 27 Concave hole 28 Projection 28a Wall 28b Inner surface 29 Intermediate flange 30 First ring wall 31 Seat surface piece 32 Second ring wall 33 Projection piece 34 Through hole 40 Cover 40a Peripheral wall 40b Wall body 41 Projection piece 42 Notch hole 42a Stepped portion 43 Opening 44 Second locking protrusion M Mower M1 Rotating shaft B Nylon cutter B1 Free end B2 Free end

Claims (5)

An opening that allows insertion of the rotary shaft of the mower is provided in the upper wall, and a hook-shaped housing fixed to the rotary shaft is provided with a pair of hook pieces having a curved surface portion on one side on the peripheral wall Along with the slit provided between the hook pieces, a guide piece for inserting a nylon cutter is fitted, and a plurality of first locking protrusions are bulged on the inner surface of the upper wall.
The bobbin which is built in the housing and is equipped with the nylon cutter is provided with a cylindrical main body portion, and upper and lower hook pieces provided on the cylindrical main body portion and formed by bulging the first and second locked protrusions. On the inner surface of the pressing projection provided at the lower part of the cylindrical main body part, the first ring wall provided in an annular shape from the inner surface side of the cylindrical main body part toward the axis , A plurality of seating surface pieces provided between the first ring wall and the inner surface of the cylindrical main body portion, and a second ring member provided in an annular shape on the inner surface of the first ring wall. A structure in which a ring wall and a plurality of protruding pieces provided between the second ring wall and the first ring wall are sequentially provided,
A dish-shaped cover that is locked to the hooking piece of the housing and covers the housing is provided, and the cover has a notch hole into which the hooking piece opened on the outer peripheral surface of the wall body is inserted. A plurality of projecting pieces provided between the cutout holes and attached to the outer side of the peripheral wall of the housing; an opening into which the bobbin projecting portion provided on the wall body is inserted; and an inner wall surface thereof Consisting of a plurality of second locking protrusions bulging
The housing, upon mounting the cover, projection of the bobbin than the opening of the cover is protruding, seating surface of the spring to the seat surface strip of the bobbin while being contact, the protrusion of the bobbin On the outside, the inner surface side of the spring is attached , and this spring is configured to be mounted between the housing and the bobbin ,
With the urging force of the spring, the second locking ridge and the second locking ridge ensure a locking relationship, and when the urging force of the spring is compressed, the bobbin moves, The first locked ridge and the first locking ridge secure a locking relationship,
A nylon cutter for a grass cutter in which the hook piece is detached from the stepped portion of the notch hole and the cover can be removed from the housing via the curved surface portion on one side of the hook piece. Rotating case with feeding mechanism. A rotary case provided with a feeding mechanism for a nylon cutter of the mower according to claim 1,
The housing includes an inner cylinder that includes a fitting portion that surrounds an opening provided in the upper wall of the housing and that is secured to the rotating shaft that is suspended from the inner surface of the upper wall outside the opening. Surrounding the cylinder, an intermediate cylinder hanging from the inner surface of the upper wall, and a seat cylinder surrounding the intermediate cylinder and hanging from the inner surface of the upper wall are sequentially provided, and the inner surface of the spring is attached to the intermediate cylinder, The spring seating surface is configured to abut against the seat tube, and a plurality of first locking protrusions are provided between the seat tube and the peripheral wall of the housing and in the radial direction of the inner surface of the upper wall. A rotating case equipped with a mechanism for feeding a nylon cutter of a mower that is configured to be provided A rotary case provided with a feeding mechanism for a nylon cutter of the mower according to claim 1,
The hooking piece is provided extending in the radial direction of the housing, a curved portion is formed on one side of the hooking piece, and the cover is detachable via the curved portion. Rotating case with a nylon cutter feed mechanism. A rotary case provided with a feeding mechanism for a nylon cutter of the mower according to claim 1,
A rotating case with a nylon cutter feeding mechanism for a mower that has a structure that opens a concave hole that can lock the inner end of the free end of the nylon cutter only on the lower collar piece of the bobbin. A rotary case provided with a feeding mechanism for a nylon cutter of the mower according to claim 1,
A rotating case provided with a nylon cutter feeding mechanism of a mower having a configuration in which a plurality of through holes for air circulation are opened in the cylindrical main body portion of the bobbin.

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