JP2001238513A - Mowing shears - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide mowing shears with wheels by which desired mowing operations are performed with ease through the adjustment of a space between the blades of the shears and a ground plane. SOLUTION: An oblong slot 14 is perforated on a longitudinal center line Y regarding blade surfaces of a pair of shears in an intermediary sheet 12 pivotally attached by a pivot 9 in such a way that the sheet 12 can rotate on a parallel plane to blade surfaces. Respective one ends of a pair of equal- length levers 15 rotatably are pivotally mounted on shears blades 7 and 8 symmetrical to each other with respect to the center line Y, and a pivot 17 in the slot 14 links together the other ends of the levers 15 under a condition that the other ends of the levers 15 can longitudinally move. Ground wheels 21 rolling along the longitudinal directions of the shear blades are fixed on protrusions 19 attached to the sheet 12 in such a way as to protrude from both sides and/or the rear part of the sheet 12. Thus, the rolling directions of the wheels always coincide with the longitudinal directions of the shear blades, which leads to capability for the easy adjustment of a space between the blades of the shears and a ground plane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to mowing scissors with wheels, and more particularly to a mechanism for appropriately regulating the direction of wheels to the direction of a scissor blade body, in which the distance between the mowing scissors and a ground contact surface is adjustable. is there.

[0002]

2. Description of the Related Art Conventionally, in mowing scissors, when a pair of wheels rotating on the ground are attached to both sides of a scissor body in order to improve operability, the wheels freely rotate around a caulking axis of the scissors. The operability is impaired because the direction of the blade edge of the scissors blade body and the direction of rotation of the wheel do not always match because of the mounting with the mounting plate. Also, the distance between the mowing scissors and the ground contact surface was adjusted separately for the left and right wheels.

[0003]

SUMMARY OF THE INVENTION The present invention relates to mowing scissors with wheels. The wheels always roll in the longitudinal direction of the scissor blades even during opening and closing operations of a pair of scissor blades for mowing. It is another object of the present invention to move the height of the pair of wheels with respect to the mowing scissors up and down together to adjust the distance between the scissor blades and the grounding surface, so that a desired mowing operation can be easily performed.

[0004]

According to a first aspect of the present invention, a vertically elongated hole is provided on a neutral plate pivotally connected to a pair of scissor blade surfaces by a pivot so as to be rotatable in parallel with the pair of scissor blade surfaces, on a longitudinal center line of the scissor blade surface. One end of a pair of isometric levers is rotatably mounted on a pair of scissor blades symmetrical with respect to the center line, and the other ends of the levers are connected to each other so as to be able to move back and forth by a shaft in the long hole, and the neutral plate is provided. Mowing scissors characterized in that a grounding wheel that rolls in the longitudinal direction of the scissor blade body is provided on a business trip portion provided on both sides and rearward, or protruding on either side. Therefore, when mowing, the longitudinal direction of the scissor blade always coincides with the rolling direction of the wheel during the opening and closing operation of the scissor blade by the opening and closing operation of the pair of handle portions.

According to a second aspect of the present invention, both sides of the erecting body are fixed by a horizontal axis parallel to the surface of the neutral plate and urged by an elastic body so as to rise on the neutral plate, and the rising angle is regulated by an adjusting screw. The mowing scissors according to claim 1, wherein the wheels are provided in a business trip portion provided to protrude rearward. Therefore, by moving the upper and lower positions of the wheel with respect to the mowing scissors with the adjusting screw, the distance between the scissor blade body and the ground contact surface can be adjusted.

[0006]

In the mowing scissors according to the first aspect of the present invention, a scissor blade is attached to a neutral plate pivotally mounted on a pair of scissor blades so as to rotate in parallel with the scissor blade body surface. A long hole is provided, and one end of a pair of isometric levers is rotatably mounted on a shaft provided at a portion on the scissor blade body which is symmetrical with respect to the center line in the longitudinal direction of the scissor blade body surface. The ends are connected so that they can move freely back and forth with the opening and closing operation of the scissors with the shaft in the long hole. For this purpose, the shaft in the slotted hole is mounted on the scissor blade body symmetrical with respect to the center line of the scissor blade body by an isometric lever, and is moved back and forth on the longitudinal center line of the scissor blade body surface with the opening and closing operation of the scissors. Since the center line of the elongated hole of the neutral plate is always overlapped with the longitudinal center line of the scissor blade body surface, the direction of the neutral plate and the longitudinal direction of the scissor blade body are always the same. If the rolling direction of the grounding wheel attached to both sides of the neutral plate and the business part protruding backward is parallel to the direction of the center line of the long diameter of the long hole, the wheel will always be in the open / close operation of the scissors. It will roll in the longitudinal direction of the scissors blade body, which matches the direction of the neutral plate.

According to a second aspect of the present invention, according to the first aspect, the neutral plate is rotated by the pivots of the pair of scissor blades in parallel with the scissor blade body surface,
The center line of the pair of scissors blades and the center line of the long hole of the neutral plate always coincide. And if the erecting body fixed on the horizontal axis parallel to the neutral plate surface and perpendicular to the center line of the neutral plate rotates on this horizontal axis, it will be installed in the business trip part that protrudes on the left and right sides of the erecting body The pair of wheels goes up and down in parallel with the neutral plate surface and the scissor blade body surface,
Raise and lower the scissors blade surface on the ground plane in parallel. On the other hand, the wheels of the business trip section that protrude backward also raise and lower the scissor blade body surface by rotating the horizontal axis of the raising body. Then, the erecting body is urged by the elastic body installed between the neutral plate and the erecting body so as to be raised by the rotation of the horizontal axis, and the distance between the two is adjusted with an adjusting screw connecting the neutral plate and the erecting body. If the rising angle is adjusted by changing the angle, the distance between the scissors blade body and the ground contact surface can be arbitrarily set with an adjusting screw.

[0008]

1 to 3 show a first embodiment of the present invention.
It will be described based on. The pair of handle portions 1 and 2 intersect at their tip sides, and are rotatably fixed at the portions via the first shaft 3. The base ends of the handle portions 1 and 2 are bent toward the rear side to provide a grip portion 4. At the tips of the handle portions 1 and 2, the U-shaped connecting part 5 is rotatably mounted on a second shaft 6 which rotates along with the rotation around the first shaft 3. The upper scissor blade body 7 and the lower scissor blade body 8 intersect substantially at the center, and at the intersecting portion, a third shaft male screw 9 and a loose-locking female screw 10 as shown in FIG. Stop it. The male screw 9 has a square portion slightly larger than the screw diameter at the base of the screw portion and is formed by the thickness of the upper scissor blade body 7 and the lower scissor blade body 8. The round hole at the intersection has a diameter slightly larger than the diagonal line of the square, and the hole at the intersection of the upper scissor blade 7 is a square hole that fits into the square. Therefore, since the male screw 9 does not rotate with the upper scissor blade 7, the female screw 10 with locking is easily screwed. Further, the base ends of a pair of scissor blades of an upper scissor blade body 7 and a lower scissor blade body 8 are externally threaded with a male screw 9 on the bottom surface of a U-shaped connecting part 5 fixed to the ends of the handle parts 1 and 2. A fourth shaft 11 that rotates with the rotation around the shaft. In such mowing scissors, the male screw 9 of the third shaft is connected to the female screw 10
, The front end of the neutral plate 12 is sandwiched between the nut 13 with a lock on the upper surface of the female screw 10, and the neutral plate 12 is pivotally attached with an appropriate play so as to rotate in parallel with the scissor blade body surface. . An elongated hole 14 is provided at a portion where the neutral plate 12 is extended to the base end side of the scissor blade body so that the center line X of the major axis overlaps the longitudinal center line Y of the scissor blade body surface. Further, a fifth scissor blade provided on the scissor blade body which is symmetrical with respect to the longitudinal center line Y of the scissor blade body surface.
One end of a pair of levers 15 of the same length is rotatably and removably mounted on a shaft 16 of this type. In addition, the other end of lever 15 is connected to slot 1
4 are connected together so that the pair of levers 15 can freely reciprocate in the elongated holes 14 by the opening and closing operation of the scissors. Further, both ends of the end portion of the neutral plate 12 are raised to form a mounting portion 18. On both sides of the mounting portion 18, a tubular travel portion 19 is extended perpendicularly to the center line X of the elongated hole. A grounding wheel 21 that rolls in the direction of the center line X with an axle 20 fitted in the pipe is attached. In the mowing scissors configured as described above, the opening / closing operation of the grip portion 4 of the handle portion performed while standing is transmitted as the opening / closing operation of mowing the scissor blades on the ground, and at the same time, the opening / closing operation of the scissors blades causes the pair of mowing scissors to open and close. A sixth shaft 17 to which the other ends of the isometric levers 15 are connected is connected to a fifth shaft 16 symmetrical with respect to the center line Y of the scissor blade from a fifth hole 16 on the center line Y of the isometric scissor blade. Slot 14 so that there is always
Guide while moving back and forth inside. Therefore, the neutral plate 12
The center line X of the long hole 14 does not deviate from the center line Y of the scissors blades 7 and 8 and overlaps. Then, the rolling direction of the grounding wheel 21 attached to the tip of the tubular traveling portion 19 that protrudes perpendicularly to the center line X of the long hole on both sides of the neutral plate 12 is parallel to the center line of the long diameter of the long hole, During the opening and closing operation of the scissors, the pair of scissor blades rolls in the longitudinal direction to which the pair of scissor blades face, thereby improving operability. In addition, when the mowing scissors are transported or stored, or when wheels are not required, the nut 13 with a lock is made detachable, removed from the male screw 9, the neutral plate 12 is removed from the male screw 9, and a pair of If the lever 15 is removed from the detachable fifth shaft 16 at one end thereof, it will not be bulky.

Next, another embodiment of the present invention will be described. In the following description, the same portions as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. 4 to 6 show a second embodiment, and FIG.
In the embodiment, a pair of upper and lower U-shaped joint parts 22 for bending is provided between a U-shaped connecting part 5 connecting the handles 1 and 2 and the scissor blades 7 and 8 and a base end of the scissor blade body. , 23 are connected by a seventh shaft 24, and the scissor blades are rotated around the seventh shaft 24 so that the scissor blades facing forward with respect to the handle are folded in a parallel direction,
The mowing scissors are designed to be extended, and one wheel 25 is installed behind the scissor blade. As shown in FIG. 6, a pair of scissors blade bodies 7, 8 having their base ends connected to a lower joint part 23 for bending are fixed with a nut 27 with a locking stopper 27 via a spring washer 26 with a third shaft 9 and a predetermined nut. It is tightened to strength. On the upper part of the nut 27, a female screw 10 with a locking
The neutral plate 12 is pivotally attached to the neutral plate 12 with an appropriate play of rotating in parallel with the scissor blade body surface with the front end of the neutral plate 12 interposed between the nut 13 and the nut 13 with a lock. Then, a long hole is provided in a portion where the neutral plate 12 is extended to the base end side of the scissor blade body, and then the axle 29 is formed at the rear end.
The business trip section 28 is extended while applying a twist so that the surface on which is attached is vertical. Further, one end of a pair of equal-length levers 15 is mounted on a fifth shaft 16 provided at a position symmetrical with respect to the center line on the scissor blade body, and the other ends of the levers 15 are connected by a sixth shaft 17. Connect so that free reciprocation in the long hole is possible. The rolling direction of the wheel 25 attached to the axle 29 at the rear end of the neutral plate 12 thus configured is the longitudinal direction of the scissors blade body, which coincides with the direction of the center line X of the major axis of the long hole. Also, the neutral plate 12
Similarly, when the female screw 10 with locking and the nut 13 with locking are sandwiched up and down, the neutral plate 12 moves up and down on the scissors blade, and the distance between the scissors blade and the grounding surface can be adjusted.
In addition, a pair of wheels 25 may be provided on the left and right sides at the rear end of the neutral plate 12, and the vehicle may run on two wheels.

A third embodiment of the present invention shown in FIGS. 7 and 8 is a combination of the first and second embodiments, and includes a neutral plate 12 having the same structure as that of the first embodiment. As in the second embodiment, the wheels 25 are mounted on a business trip portion 28 extending to the rear of the scissors blade body, and a total of three wheels including a pair of wheels 21 mounted on a business trip portion 19 protruding on both sides of the neutral plate. The mowing scissors stabilize on the ground in front, back, left and right, and the operability is further improved.

FIGS. 9 and 10 show a fourth embodiment of the second embodiment. In the first embodiment, the direction of the neutral plate and the direction of the scissors blade are always changed during opening and closing operations of the handles 1 and 2 in the first embodiment. In the matching mowing scissors, a pair of left and right horizontal shafts 30 that are parallel to the upper surface of the neutral plate 12 and are perpendicular to the center line X of the elongated hole 14 are provided on the mounting portion 18 that is raised on both sides of the tip of the neutral plate 12. . The horizontal shaft 30 fixes the front side of both sides of the inverted U-shape bent below the raising body 31. A screw 32 having a large diameter head on the lower surface side of the neutral plate 12 is urged upward so as to raise the erecting body 31 through a hole provided with play for swinging in the front-rear direction above the neutral plate 12. Through the inside of the spring 33
Adjustable female screw 3 on the upper surface through the hole in the middle of the raising body 31
It is screwed in at 4. Therefore, the raising body 31 pressed by the spring 33 on the upper surface of the neutral plate 12 is
The rising angle is determined by the amount by which the screw is screwed into the screw 32, and the rising amount of the raising body 31 can be arbitrarily adjusted by turning the adjusting female screw 34 to tighten or loosen the spring 33. Further, a tubular travel portion 19 is projected from the rear side, which is eccentric with the horizontal axis 30 on both side surfaces of the erecting body 31, perpendicularly to the center line X of the elongated hole 14 of the neutral plate 12, and attached to the tip thereof. The grounding wheel 21 moves up and down in parallel with the scissor blade body surface by adjusting the amount of screwing the adjusting female screw 34 into the screw 32, so that the distance between the grounding surface and the scissor blade body can be adjusted. In addition, the grounding wheel 25 attached to the tip of the business trip portion 28 extending rearward along the center line X of the elongated hole 14 of the neutral plate 12 from the rear part of the erecting body 31 is also raised by turning the adjusting female screw 34. The distance between the tread surface and the scissors blade can be arbitrarily adjusted by adjusting the amount of body rising.

[0012]

In the mowing scissors of the present invention, the center line Y in the longitudinal direction of the body surface of the scissors blade and the center line X of the major axis of the long hole always overlap during the opening and closing operation of the scissors, and the direction of the neutral plate and the direction of the scissor blade body are The business unit 1 which always coincides and protrudes to both sides of the neutral plate 12 and to the rear.
Grounding wheels 21 and 25 attached to 9 and 28
Rolls in the longitudinal direction of the scissor blade body, which coincides with the direction of the center line X of the major axis of the long hole, and when cutting grass, work easily without opening or closing the handles 1, 2 without the wheel direction fluctuating from side to side. Can be. Further, wheels 25 at the rear end of the neutral plate,
When the vehicle is driven by three wheels 21 on the left and right, the mowing scissors work stably on the ground in all directions and the operability is further improved. Further, in the mowing scissors of claim 2, the neutral plate 12
The rising angle of the erecting body 31 can be adjusted by adjusting the degree of deformation of the intermediate elastic body by the screw 32 and the adjusting female screw 34 connecting the erecting body 31 to the erecting body 31. The grounding wheel 21 provided on the axle 20 which is eccentric to the upper and lower sides moves up and down in parallel with the scissor blade body surface only by turning the adjusting female screw 34, and further, the grounding wheel 21 contacts the axle 29 at the rear end of the erecting body 31 Even when the wheels 25 are provided, the wheels 25 move up and down only by turning the adjusting female screw 34, so that in any case, the distance between the ground surface and the scissor blade surface is easily and arbitrarily adjusted,
Desired mowing can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a first embodiment of the present invention.

FIG. 2 is an overall perspective view showing a first embodiment of the present invention.

FIG. 3 is a perspective view showing a male screw of a third shaft.

FIG. 4 is a perspective view of a main part showing a second embodiment of the present invention.

FIG. 5 is an overall perspective view showing a second embodiment of the present invention.

FIG. 6 is a side view of a main part showing a second embodiment of the present invention.

FIG. 7 is a perspective view of a main part showing a third embodiment of the present invention.

FIG. 8 is an overall perspective view showing a third embodiment of the present invention.

FIG. 9 is a side view of a main part of a fourth embodiment of the present invention from which a front wheel is removed.

FIG. 10 is a perspective view of a main part showing a fourth embodiment of the present invention.

[Explanation of symbols]

 7 8 Scissor blade body 9 Third axis 12 Neutral plate 14 Long hole 15 Lever 16 Fifth axis 17 Sixth axis 19 28 Business trip part 21 25 Wheel 30 Horizontal axis 31 Elevator 32 Screw 34 Adjusting female screw

Claims (2)

[Claims] 1. A scissor blade body symmetrical with respect to the center line, wherein a longitudinally long hole is provided on a neutral plate pivotally connected to a pair of scissor blade body surfaces by a pivot so as to be able to rotate in parallel with the pair of scissor blade body surfaces. One end of a pair of equal-length levers is rotatably mounted on the upper side, and the other ends of the levers are connected to each other so as to be able to move back and forth by a shaft in the long hole, and either or both of the neutral plate and the rear side Mowing scissors characterized in that a grounding wheel that rolls in the longitudinal direction of the scissor blade body is provided in a business trip section that is provided overhanging the scissor blade. 2. An elevator which is fixed on a horizontal axis parallel to the surface of the neutral plate and is urged by an elastic body so as to rise up on the neutral plate, and is adjusted on both sides or rearward of the riser whose rising angle is regulated by an adjusting screw. The mowing scissors according to claim 1, wherein the wheels are provided in an overhanging business trip section.