JPH09294471A - Pruning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pruning machine capable of carrying out a smooth pruning work without causing a trouble, even when the surface of the ground or a place near to a fence is pruned on the pruning of the lower part of a spherical garden tree or a hedgerow. SOLUTION: A shaft handle 10 is formed in a state capable of being divided into a front dividing member 11 and a rear dividing member 12 in the middle grip 9 of a single-edged pruning machine, and the front dividing member and the rear dividing member are respectively connected to the pruning blade 8 and to the main body case 1. Catching claws 18 whose spring forces are energized, and a swollen part 20 on whose peripheral edge the suitable number of depressions 19 capable of facing to the catching claws disposed at a prescribed pitch are projected from the mutually faced end parts 16, 17 of the front and rear dividing members, respectively. The front and rear dividing members can always be twisted on their shaft handle axis, so that the catching claws are slid on the peripheral edge part of the swollen part and simultaneously elastically press-engaged with the proper depressions. Thereby, the restraining state of the dividing members can be maintained at a prescribed twist position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive source, a power conversion mechanism, and a long clipper-type cutting blade that are integrally directly connected to each other, and a large number of cutting blades are provided only on one side edge with respect to a stem. The present invention relates to a clipper-type clipper, which is a so-called single-edged type in which rows of rows are lined up and used for cutting various hedges, pruning trees, cutting tea trees, and the like.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 1, a mower of this type has a drive source 2 such as a motor in a main body case 1 and a power for converting a rotation from the drive source 2 into a reciprocating motion. Each of the conversion mechanisms 3 is built in the main body case 1 and is extended forward to hold the movable plate 7 from the main body case 1, and a horizontal shaft shaft extending to the cutting blade 8 is provided. ing. (Note that the reference numerals of the above-mentioned prior art are indicated by the same reference numerals as those which are recognized to be substantially the same as the corresponding reference numerals in the embodiments of the present invention described later.)

The main body case 1 is maintained at a height at which the shaft 10 is inserted and fitted therein, and mainly has a relatively large pedestal portion 2 in which a power conversion mechanism 3 is built.
2 and mainly a relatively small upright protruding portion 23 having a built-in drive source such as a motor.

Incidentally, as well known, the shaft 10 has a function of simply connecting them straightly, so to speak, an arrow A between the main body case 1 and the cutting blade 8 does not mean anything. Alternatively, it does not have a twisting function in the direction of the anti-arrow A.

[0005]

However, as described above, in the case of the single-edged type mower, which has the main body case of the upright protruding shape as described above, first of all,
When mowing a spherical garden tree such as a boxwood family, the trimmer itself must be rotated and trimmed while adjusting its angle so as to follow the contour of the garden tree. As it goes to the bottom, the main body case is gradually forced to assume an inverted posture.

When the main body case is turned upside down as described above, the operator has to hold the main body case with his / her hand, which makes it difficult to perform the work. Moreover, the standing protrusion of the main body case is used. However, it gradually approaches the ground and the like and eventually collides. In other words, there is a problem that the main body case and the ground support each other, which hinders the movement of the trimming machine and hinders the trimming work.

Secondly, when cutting hedges or lawns horizontally, obliquely, and vertically, when cutting the edge without the cutting blade (opposite to the cutting blade). , If the edge of the body touches a fence provided at the boundary of a house, a site, etc., the body case of the trimmer must be kept in the inverted position. There was a problem that it hindered smooth and clean cutting work by supporting it on the edge of the lawn or on the ground.

An object of the present invention is to provide a mower that solves the above problems.

[0009]

In order to achieve such an object, the invention of a trimmer according to the present invention comprises a main body case 1;
Drive source 2 built in the main body case 1 and the drive source 2
The power conversion mechanism 3 for converting the rotation from the above into a reciprocating motion, the fixed plate 5 and the fixed blade 4 in which a large number of fixed blades 4 are arranged in a row in front of the drive source 2 over one side edge in the longitudinal direction. A large number of movable blades 6 are arranged in line at one side edge in the direction, and the movable plate 7 is attached to the fixed plate 5 so as to be able to reciprocate, and the fixed blade 4 and the movable blade 6 are used for the power conversion. By the reciprocating motion converted by the mechanism 3, a pair of cutting blades 8 which can slidably press each other are formed, and a shaft 10 which extends forward from the main body case 1 to hold the movable plate 7 is formed. In a case where the intermediate grip 9 is arranged at an appropriate portion, the shaft 10 is divided into a front divided body 11 and a rear divided body 12 in the intermediate grip 9, and the front divided body 11 is formed as described above. Cutting blade 8
Side and the rear divided body 12 are connected to the main body case 1 side, respectively, and these front divided body 11 and rear divided body 12 are connected.
The opposite ends 16 and 17 of the
7) has a locking claw 18 and the other opposite end 17 (1
6), a bulge portion 20 having a uniform thickness is projected from the 17 (16), and the locking claws 18 are provided at the peripheral edge of the bulge portion 20 at a predetermined pitch. A suitable number of recesses 19 that can be exposed to, and a spring force 13 is urged to the locking claw 18 so that the locking claw 18 is always in sliding contact with the peripheral edge portion of the bulging portion 20, When the rear divided body 12 and the front divided body 11 are twisted around the stalk axis by elastically contacting the concave portion 19, the rear divided body 12 is twisted with respect to the front divided body 11. After the locking claw 18 is brought into sliding contact with the peripheral edge of the bulging portion 20, the bulging portion 2 at a predetermined twisting position.
It is engaged in the recess 19 of 0 and is locked so that the restrained state in the rotation direction can be maintained to maintain a predetermined twisting position, and the mutual predetermined twisting position of the front divided body 11 and the rear divided body 12 is released. At this time, the rear division body 12 and the front division body 11 are strongly rotated against the spring force 13 so that the locking claw 18 can be separated from the recess 19, so that the rear division body 12 and the front division body 11 can be returned to the original positions before the twisting. It is characterized by being configured in.

The spring force is not limited to the case where an elastic material such as synthetic resin having elasticity is used for the locking claw itself.
It includes the case where the spring force is applied to the inelastic member by borrowing the force of the spring member, but in any case, the spring force is such that the front divided body 11 and the rear divided body 12 can be disengaged during twisting. Is set to.

The front division body 11 and the rear division body 1 are also provided.
The predetermined twisting position for maintaining the locked and restrained state in which the rotation can be switched at a predetermined circumferential pitch with respect to 2 can be appropriately changed, for example, a 45 ° pitch, a 90 ° pitch, or a smaller angular pitch. Is.

[0012]

In use of the trimmer according to the present invention, the trimming work is usually performed with the standing protrusion 23 side of the main body case 1 on the front side, as shown by the solid line in FIG.
At this time, the front divisional body 11 and the rear divisional body 12 have the locking claws 18 and the bulging portions 2 provided on the opposing end portions 16 and 17, respectively.
As shown in FIG. 7, the 0 recessed portions 19 are not twisted by the bias of the spring force 13 and are maintained in a normal initial locked state.

As described above, the main body case 1 of the trimmer is kept in the inverted posture when the end on the side not having the trimming blade is cut close to the spherical garden book or hedge, the lawn fence, etc. This must be done, but this action is performed as follows.

First, the rear divided body 12 connected to one of the main body cases 1 is grasped at an appropriate position with a hand, and the front divided body 11 is held.
On the other hand, the spring 13 is rotated left and right while being in sliding contact with each other by twisting around the shaft shaft axis while resisting the spring 13 force. Then, with the rotation, the front divided body 1
1, the engagement of the pair of locking claws 18 at the opposite ends 16 and 17 of the rear divided body 12 and the recess 19 of the bulging portion 20 is once disengaged from the initial state. 1
7 shifts to the sliding contact with each other to reach another next predetermined twisting position, which is different from the initially engaged state, to be engaged again.

By the engagement of the locking claw 18 and the recess 19 of the bulging portion 20 at the next twisted position, the desired twisted state of the front divided body 11 and the rear divided body 12 is held in a locked state. Is done. Then, by rotating the locking position at the predetermined circumferential pitch by an appropriate amount to the left and right, the body case 1 of the trimmer can be maintained in the inverted posture or the desired twisted posture.

In such a desired twisted posture, the standing protrusion of the main body case 1 is prevented from being supported by the hedge, the edge of the lawn or the ground, and a smooth and clean cutting operation can be achieved. Further, in order to return to the original position before the twist in which the discrepancy between the front divided body 11 and the rear divided body 12 has been released from the inverted posture or the desired twisted posture, the reverse operation of the rear divided body 12 is performed. This can be achieved by rotating the shaft in the direction or further rotating in the same direction as described above until returning to the original position and maintaining the locking claw 18 and the recess 19 of the bulging portion 20 in the locking constraining bear. Because. This operation is performed with one hand using the shaft handle 10 on the main body case 1 side.
With the other hand, the shaft handle 10 on the cutting blade 8 side can be gripped respectively, and a quick and smooth twist switching operation can be efficiently performed.

[0017]

Since the trimmer according to the present invention has the structure and operation as described above, it has the following effects. That is, it is possible to very easily avoid the situation where the upright protruding portion of the main body case supports the hedge, the edge surface of the lawn or the ground, and perform a smooth and clean cutting operation. Also,
The intermediate grip covers the locking claws of the front and rear divided bodies and the recesses of the bulging portion without being exposed to the outside, and the hedges, lawn leaves and stems are caught and hedges, lawns, etc. Needless to say, there is no fear of damage to the trimmer itself, and there is an advantage that the life is long. Furthermore, the cutting blade can freely change the inclination according to the cutting site such as lawn,
It is possible to provide a convenient mower capable of supporting various kinds of cutting such as horizontal cutting, oblique cutting, and vertical cutting of lawns and hedges.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 8 show an embodiment of a trimmer according to the present invention. FIG. 1 is a perspective view of the whole trimmer, and FIG.
3 is a cross-sectional view of the shaft handle inserted into the main body case as seen from the direction of arrow II-II in FIG. 3, and FIG. 3 shows the shaft bear with the intermediate grip disposed in the main body case on the insertable bear. FIG. 4 is a partial longitudinal sectional view, FIG. 4 is a perspective view showing the appearance of a front divided body and a rear divided body immediately before being inserted into the intermediate grip, and FIG. 5 is a front divided body and a rear divided body in the intermediate grip. 6 and 7 are end views showing opposing ends of the rear divided body and the front divided body, respectively, and FIG. 8 is a view in which the opposite end portions are in sliding contact with each other. It is an action explanatory view showing the state where it rotates.

In these figures, the main body case 1 containing a drive source 2 and a power conversion mechanism 3 is provided in the main body of the mower, and the rotation from the drive source 2 is converted into a reciprocating motion by the power conversion mechanism 3. It The drive source 2 used is a motor-type conventional clipper-type trimmer, and a fixing plate 5 is attached to the front portion of the main body case 1.

The fixed plate 5 is provided with a large number of fixed blades 4 arranged in a saw-tooth shape at regular intervals over one side edge of the drive source 2 in the longitudinal direction of the front surface. One side of the fixed blade 4 in the same direction as the fixed blade 4. A movable plate 7 having a large number of movable blades 6 lined up at its edge is superposed on the fixed plate 5 so as to be slidably contactable, and is movable with respect to the fixed plate 5 by the reciprocating motion converted by the power conversion mechanism 3. A pair of cutting blades 8 which can reciprocate the plate 7 and are slidably pressed against each other are formed. One end of the movable plate 7 is integrally connected to the tip of the reciprocating transmission plate 26. It is fixed.

The reciprocating transmission plate 26 is provided with a guide groove 35 extending in the left-right direction at an intermediate portion thereof, and a guide groove 27 extending in a longitudinal direction (a direction perpendicular to the guide groove 35).
27 are arranged at the front and the rear with the guide groove 35 in between. On the other hand, the rotation of the drive source 2 is controlled by the gear 29 fitted around the central axis 28 of the drive source 2, the gear 30 meshed with the gear 29, the gear 31 fitted on the same axis of the gear 30, and the gear 32 meshed with the gear 31. At the eccentric position of the rotary plate 33 that can be decelerated and rotated about the same axis of the gear 32, the protrusion 34 protruding from the lower surface of the rotary plate 33 faces the guide groove 35.

By turning on the switch 24 of the drive source 2 and sliding the protrusion 34 along the guide groove 35, two protrusions 36, 36 integrally fixed to the trimmer main body are provided.
The reciprocating transmission plate 26 is slidably moved in the front-rear direction at the positions of the guide grooves 27, 27.
The movable plate 7 connected to 6 can reciprocate.

Between the fixed plate 5 and the movable plate 7, movable blades 6 in the form of scissors, which are separated one by one, are inserted, and the movable blades 6 are moved one by one by screws 38. Are installed in line. The screw 37 attached to each movable blade 6
This is a portion that serves as a fulcrum when the movable blade 6 makes an arc motion along with the reciprocating motion of the movable plate 7. Then, the tightening of the screws 37 and 38 is adjusted so that the sharpness is optimal,
A fan 25 is provided above the drive source 2.

In the main body case 1, a shaft 10 is extended forward so as to hold the movable plate 7, and an intermediate grip 9 is arranged at an appropriate portion of the shaft 10. Then, in the intermediate grip 9, the shaft 10 is provided with the front divided body 1.
1 and a rear divided body 12 are formed in front and rear.

As shown in FIG. 4 or 5, the shaft 10 has hollow pipes 41 and 48 each having a substantially rectangular cross section in each of the front divided body 11 and the rear divided body 12, and the front divided body is divided. The body 11 has a cylindrical portion 40 having a movable plate insertion hole 44 in a rear wall on the rear side of the collar portion 39 as a boundary, and a front side of the collar portion 39 is inserted into the collar portion 39 and the cylindrical portion 40, and In order to prevent mutual sliding between the cylindrical portion 40 and the hollow pipe 41, a proper number of through holes 42 formed in the peripheral surface of the hollow pipe 41 and the inner wall of the cylindrical portion 40 that can be exposed to the through holes 42 project. It engages with the provided protrusion 43. The shaft 10 is hollow pipe 48 as shown in FIG.
Is integrally attached and connected to the cutting blade 8 by a U-shaped cross-section mounting bracket 45.

The rear divided body 12 has a cylindrical portion 47 having a movable plate insertion hole 46 in the rear wall on the rear side, and a hollow pipe 48 connected to the cylindrical portion 47 and extended to the front side. The cylindrical portion 47 and the hollow pipe 48 have the same structure as that of the front division body 11 described above, and an appropriate number of holes are bored on the peripheral surface of the hollow pipe 48 so that mutual sliding does not occur. The through hole 42 and the projection 43 protruding from the inner wall of the cylindrical portion 47 that can be exposed to the through hole 42 are meshed with each other. As shown in FIG. 2, the shaft handle 10 has a hollow pipe 41 integrally attached to the main body case 1 by a U-shaped cross-section attachment fitting 49.

The intermediate grip 9 is made of rubber or plastic which is an elastic body, and is provided with an appropriate uneven surface on the peripheral surface so as not to slip when gripped by the palm. As shown in FIG. 5, the intermediate grip 9 has a shape in which the front end is expanded into a trumpet shape, and the rear divided body 12 and the front divided body 11 are attached to the intermediate grip 9 as shown in FIG. As shown by the arrow, the trumpet-shaped portion is closed by the collar portion 39 of the front divisional body 11 and the cylindrical portion 47 of the rear divisional body 12 is inserted through the intermediate grip 9 by sequentially inserting. The rear wall portion 50 having the hole 51 can prevent the longitudinal displacement from occurring.

As described above, the front divided body 11 and the rear divided body 12 are connected to the cutting blade 8 side and the main body case 1 side, respectively, and the opposite end portions of the front divided body 11 and the rear divided body 12 are connected to each other. A pair of locking claws 18 and a recessed portion 19 of the bulging portion 20 which are elastically engageable with each other at a predetermined circumferential pitch by the biasing of the spring 13 force are formed in the parts 16 and 17.

The locking claw 18 is made of a synthetic resin material of the same quality as that of the front divided body 11, in other words, the locking claw 18 itself has an appropriate elasticity to which the spring force 13 is applied,
Two opposing ends 16 of the front divided body 11 are provided symmetrically with respect to the axis. In other words, as shown in FIG. 7, the base end portions of the respective locking claws 18 are located above the facing end portion 16,
It is integrally fixed to the lower peripheral edge portion, and slightly inside thereof along the peripheral edge portion, that is, substantially along the inner side of the peripheral edge portion of the facing end portion 17 of the rear divided body 12. It faces the vicinity of the peripheral edge on the opposite side in an arcuately curved posture, and is kept in the shape of a bear which is separated from the surface of the opposed end 16 with a slight gap except the base end.

On the other hand, a bulging portion 20 having a uniform and small thickness is projected from the facing end portion 17 of the rear divided body 12, and a peripheral edge portion of the bulging portion 20 is provided. An appropriate number (four in this embodiment) of recesses 19 are provided so that the bulged tips of the locking claws 18 can be seen at predetermined pitches.

Then, as described above, the main body case 1 of the trimmer is kept in the inverted posture when the end portion on the side without the trimming blade is cut near the spherical garden trees or hedges, the fence of lawn, etc. In the case of a bear, the twisting of the rear divisional body 12 and the front divisional body 11 about the axis of the stalk is performed. With the twisting, the front divisional body 11 and the rear divisional body 12 are twisted. The engagement of the pair of locking claws 18 at the opposite end portions 16 and 17 of the and the recessed portion 19 of the bulging portion 20 once disengages from the initial state bear, but after that, the locking claw 18 moves around the bulging portion 20. While slidingly contacting the end edge portions, the sliding contact between them reaches the concave portion 19 opposed to the next predetermined twisting position, which is different from the initially engaged state, so as to reach the concave portion 19 so as to be elastically pressure-contacted and engaged again. Enter.

As described above, when the recessed portion 19 of the bulging portion 20 at the predetermined twisting position is engaged, the front divisional body 11 and the rear divisional body 1 are inserted.
2 and 2 can maintain the restrained state in the rotation direction at the mutual predetermined twist position, and can maintain the predetermined twist position. It should be noted that, when it is necessary to further twist, it is performed in the same manner as above.

When releasing the predetermined twisting positions of the front divided body 11 and the rear divided body 12, the rear divided body 12 is released.
By strongly rotating the front divided body 11 in the same direction or in the opposite direction as described above against the spring force 13 so that the locking claw 18 can be disengaged from the recess 19, the original position before the twisting. Thus, the state in which the locking claw 18 and the recess 19 that have returned to the state of the above are elastically engaged is maintained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the entire trimmer according to the present invention.

FIG. 2 is a plan view in which a shaft is inserted into a main body case, which is a cross section viewed from the direction of arrow II-II in FIG.

FIG. 3 is a partial vertical cross-sectional view in which a shaft handle having an intermediate grip arranged in a main body case is in an inserted state.

FIG. 4 is a perspective view showing appearances of a front divided body and a rear divided body immediately before being inserted into the intermediate grip.

FIG. 5 is a vertical cross-sectional view showing a state in which a front divided body and a rear divided body are inserted into an intermediate grip.

FIG. 6 is an end view showing the facing end portion of the rear divided body.

FIG. 7 is an end view showing the facing end portion of the front divided body.

FIG. 8 is an operation explanatory view showing a state in which the opposite ends rotate while slidingly contacting each other.

[Explanation of symbols]

1; body case, 2; drive source, 3; power conversion mechanism, 4;
Fixed blade, 5; fixed plate, 6; movable blade, 7; movable plate, 8; cutting blades (4, 6), 9; intermediate grip, 10; shaft, 1
1; front divided body, 12; rear divided body, 13; spring force, 1
6; opposite end, 17; opposite end, 18; locking claw, 19;
Concave portion, 20; bulge portion, 22; pedestal portion, 23; standing protrusion portion, 24; switch, 25; fan, 26; reciprocating transmission plate, 27; guide groove, 28; central shaft, 29; gear wheel, 30;
Gears, 31; Gears, 32; Gears, 33; Rotating plates, 34;
Protrusion, 35; Guide groove, 37; Screw, 38; Screw, 39;
Spring, 40; Cylindrical part, 41; Hollow pipe (rear part), 4
2; through hole, 43; protrusion, 44; movable plate insertion hole (11
No.), 45; mounting bracket (front part), 46; movable plate insertion hole (of 12), 47; cylindrical part, 48; hollow pipe (front part), 49; mounting bracket (rear part), 50; rear wall part , 51;
Through hole.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area A01G 3/06 A01G 3/03 H

Claims (1)

[Claims] 1. A main body case 1, a drive source 2 incorporated in the main body case 1, a power conversion mechanism 3 for converting rotation from the drive source 2 into a reciprocating motion, and a longitudinal direction in front of the drive source 2. A fixed plate 5 in which a large number of fixed blades 4 are arranged in a row over one side edge in the direction, and a large number of movable blades 6 on one side edge in the same direction as the fixed blade 4.
By a reciprocating motion in which the movable plate 7 and the fixed blade 4 and the movable blade 6 are converted by the power conversion mechanism 3, A pair of cutting blades 8 which can be slidably pressed against each other are formed, and an intermediate grip 9 is arranged at an appropriate portion of a shaft 10 extending forward from the main body case 1 to hold the movable plate 7. In the intermediate grip 9, the shaft shaft 1
0 is divided into a front divided body 11 and a rear divided body 12,
The front divided body 11 is connected to the cutting blade 8 side, and the rear divided body 12 is connected to the main body case 1 side. The front divided body 11 and the rear divided body 12 have opposite end portions 16 and 17, respectively. The locking claw 18 is provided on one of the 16 (17) and the other 17 (16) is provided on the opposite end 17 (16).
From which a bulging portion 20 having a uniform thickness is projected, and a proper number of concave portions 19 which the locking claws 18 can face at a predetermined pitch at the peripheral edge portion of the bulging portion 20. A spring force 13 is applied to the locking claw 18 so that the locking claw 18 is always in sliding contact with the peripheral edge portion of the bulging portion 20 and is elastically brought into pressure contact with the recess 19 as appropriate. When twisting the rear divided body 12 and the front divided body 11 around the stalk axis,
By twisting the rear divisional body 12 with respect to the front divisional body 11, the locking claws 18 are brought into sliding contact with the peripheral edge of the bulging portion 20, and then are engaged in the recesses 19 of the bulging portion 20 at a predetermined twisting position. ．
The front divisional body 11 and the rear divisional body 1 are retained by locking so as to maintain the restrained state in the rotation direction and maintaining a predetermined twist position.
At the time of releasing the mutual predetermined twisting position with respect to 2, the rear divided body 12 and the front divided body 11 are twisted by strongly rotating them against the spring force 13 so that the locking claw 18 can be separated from the recess 19. A mower characterized by being configured so as to be able to return to its former position.