JPH11266702A - Horticultural trimming machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scissors type cutter comprising one main body common to each edged tool of trimming clippers and a hedge trimmer, in which the edged tools can be changed without screws, having excellent trimming ability. SOLUTION: One end of an edged tool is engaged with one part of a main body case 1. When the other is pushed against the main body case 1, the hook of the edged tool is engaged with the hook holder of the main body by spring force, the tip of a sliding plate 13 is slid by a hand and a long hole part is engaged with an eccentric cam to complete assembly. When the manual knob 7 of the main body case 1 is moved, an engaging part is released to remove the edged tool. The opening and closing of the edged tool, in which the sliding plate 13 for changing the rotation of the eccentric cam to vertically move by a coil spring attached to a reduction gear into a sliding motion is fixed with surrounding the rotary central shaft 20 of upper and lower pairs of movable blades 14 and 15 attached to a movable blade fitting plate 17 and further rocking shafts 21 which are set at the outside of the central shaft and alternately arranged in the direction perpendicular to the direction of the sliding direction change the reciprocation of the sliding plate 13 to the reciprocating rocking motion of the movable blades 14 and 15, carries out cutting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pruning machine such as a clipper and a hedge trimmer used for pruning lawns and hedges and for pruning tree branches and leaves.

[0002]

2. Description of the Related Art Hitherto, gardening clippers for cutting lawn and grass have been formed on the bottom surface of the final reduction gear by changing the rotation force of a motor or an engine as a drive source to an appropriate number of rotations by a combination of a reduction gear. The rotation of the eccentric cam is converted into the swinging motion of the movable blade, and the lawn and grass are cut off by the respective shearing action with the fixed blade. The fixed blade is generally fixed to the body housing with several screws. It is a target. (Japanese Utility Model Application 5-51051)

A hedge trimmer used for cutting and trimming hedges and the branches and foliage of a tree is provided with an appropriate number of rotations by a combination of the above-described reduction gears, and the rotation of an eccentric cam formed on the bottom surface of the final reduction gear is comb-shaped. The movable blade is converted into a sliding motion back and forth, and the respective blades are trimmed and pruned by respective shearing action with a similar comb-shaped fixed blade. The fixed blade is fixed to the main body housing with several screws. It is.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, two types of cutting tools, the aforementioned clippers for lawn mowing and the hedge trimmers for cutting branches and leaves such as hedges, are shared by a single main body. The structure is such that it can be attached and detached without screwing it to the case, and the blade is made to open and close in the same way as the scissors to improve the cutting ability.

[0005]

In order to replace the conventional blades of the above-mentioned hedge trimmer for cutting leaves and leaves such as clippers for mowing or hedges, the guide portion of the movable blade is fitted and connected to the eccentric cam. In addition to the fact that the hand must be moved by directly grasping the cutting edge or the eccentric cam, there is also a problem that the hand must be screwed, in addition to the problem of dirtying the hand with grease or damaging the hand with the cutting edge. Also, since the cutting width of the clippers for lawn mowing is about 10 cm, there is also a problem that the lawn mowing operation takes too much time.

Also, since the blades of the clippers for lawn mowing and the hedge trimmer for cutting branches and leaves are made of a single plate for both the fixed blades and the movable blades, even if only one portion is missing, the entire blade must be replaced. was there.

[0007]

The present invention has been made in order to solve the above-mentioned problems. By attaching and detaching and replacing two types of blades, one for lawn mowing and the other for cutting branches and leaves such as hedges, it can be shared by one main unit. (2). Two types of cutting blades, a clipper for lawn mowing and a hedge trimmer for cutting foliage such as hedges, can be removed and replaced without screwing. (3). The upper and lower movable blades, which have the same shape as the scissors, are connected and configured to the number required for the cutting width, and the rotational motion of the eccentric cam connected to the drive source is transmitted to all the upper and lower movable blades to move the movable blade. Is made to perform a cutting action by making the same swinging motion as scissors.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the external appearance of a part of a blade portion of the electric hedge trimmer, FIG. 2 is a bottom view thereof, and FIG. 3 is a side sectional view of a main part. In the figure, reference numeral 1 denotes a main body case that can be used for both a hedge trimmer and a hair clipper. A detachable auxiliary handle 2 and a hand guard 3 are attached to the outer surface of the main body case. A power switch and the like (not shown) are stored. The main body case 1 is provided with a slot 4 which is engaged with one end of the blade assembly on the bottom surface of the handle so that the blade assembly of both the hedge trimmer and the clipper can be attached and detached. A hook holder 6, which is a lock receiving portion provided with a push coil spring a5 for applying a force (to the left) for locking the other end of the assembly, is incorporated.

To install the hedge trimmer blade assembly into the main body case, insert the two claws of the movable blade mounting plate 17 into the slot 4 provided on the bottom surface of the handle of the main body case 1 and then connect the other end side. When restrained by the main body case 1, the hook 24, which is a locking portion attached to the hedge trimmer blade assembly, is locked by the hook holder 6 which is a locking receiving portion of the main body case 1, and the blade assembly is fixed to the main body case 1. But the sliding plate 1
In some cases, the oval portion 3 may not be fitted to the eccentric cam 10. In this case, the pressing coil spring b11 contracts and the eccentric cam 10 is in a sunk state. Therefore, by manually sliding the distal end portion 25 of the sliding plate 11 back and forth, the oval portion of the sliding plate 13 reaches the fitting position with the eccentric cam 10, and
The eccentric cam 10 is necessarily fitted by the force of the pressing coil spring b11. Next, when removing the hedge trimmer blade assembly from the main body case 1, the locking force of the hook holder 6 is released by moving the manual knob 7 attached to the outer upper surface of the main body case 1 with a finger in the direction of the arrow. Therefore, the blade assembly can be removed by lifting the other end.

A power cord 8 connected to a driving motor is attached to a rear portion of the main body case 1.

Next, a mechanism for causing the upper and lower movable blades to open and close in the same manner as scissors will be described. The rotation of the driving motor is set to an appropriate number of rotations by a speed reduction gear. The eccentric cam 10 is attached to the final speed reduction gear 9 with a screw a12 while an upward force is applied by a pressing coil spring b11. After the rotation of the eccentric cam 10 is converted into a reciprocating motion by the sliding plate 13 attached to the movable blade mounting plate 17, the movable upper blade 14 and the movable lower blade 15 are reciprocally oscillated. A central axis of rotation of the blade and a swing axis provided outside thereof are required. Therefore, the center axis of rotation of each movable blade is connected to a hexagon nut a18 and a screw b via a rotary shaft spacer 20.
Further, the oscillating shaft is constituted by a flat head screw a22 and a hexagon nut b23 via oscillating shaft spacers 21 alternately arranged in a direction perpendicular to the longitudinal movement direction of the sliding plate 13. Then, each is mounted on the movable blade mounting plate 17. As a result, the rotation of the eccentric cam 10 is converted into a reciprocating motion by the sliding plate 13, and is further converted into a reciprocating swinging motion of the movable upper blade 14 and the movable lower blade 15. You will exercise. ([Eccentric cam left end] and [Eccentric cam right end] are shown in FIG. 2) A fixed blade a26 and a fixed blade b27 corresponding to the movable upper blade 14 are provided before and after the blade portion.

Next, the case where this pruner is used as an electric clipper will be described with reference to FIGS. 4 and 5. FIG.
FIG. 4 is a bottom view of the hair clipper, and FIG. 5 is a side sectional view of a main part thereof. The clipper blade assembly can be attached to and detached from the main body case 1 in the same manner as the hedge trimmer blade assembly. In the drawing, reference numeral 1 denotes a main body case when used for a hair clipper. As described above, the main body case 1 incorporates a drive motor, a final reduction gear 9, an eccentric cam 10, and the like.

Next, a mechanism for causing the upper and lower movable blades to open and close in the same manner as scissors will be described. The oscillating plate 31 attached to the clipper movable blade attachment plate 29 is fitted to the eccentric cam 10 at an oval hole, so that the oscillating plate 31 is centered on the oscillating shaft screw 40. Can be converted into a reciprocating swinging motion. The other end of the rocking plate 31 is connected to the movable blade mounting plate 2
9 and is connected to a sliding plate 32 attached to the same. Since the sliding plate 32 is sandwiched so as to surround the entire rotating shaft spacer 30, the sliding plate 32 is converted into a reciprocating left and right motion. Then, the movable upper blade 33 and the movable lower blade 34 are flat-headed via rocking shaft spacers 35 alternately arranged outside the rotary shaft in a direction perpendicular to the left and right reciprocating directions of the sliding plate 32. b3
6 and a hexagonal nut c37, and are attached to the clipper movable blade cover 28 and the clipper movable blade mounting plate 29 with a hexagonal nut d38 and a screw c39, respectively. With this mechanism, the rotation of the eccentric cam 10 is converted into a reciprocating rocking motion by the rocking plate 31, and further converted into a left-right reciprocating motion by the sliding plate 32 sandwiched around the entire rotary shaft spacer 30. After that, the movable upper blade 33 and the movable lower blade 34 are caused to swing, so that the same [cutting] movement as scissors can be performed.

Next, a modified embodiment of the electric hedge trimmer will be described with reference to an external perspective view in which a part of a blade portion of FIG. 6 is sectioned. Reference numeral 41 denotes a main body case. A detachable auxiliary handle 42 and a hand guard 43 are attached to the outer surface of the main body case. The internal structure of the main body case 41 is the same as that of FIG. I do.

Next, a mechanism for opening and closing the blade unit will be described. Movable blade mounting plate 4 also serving as fixed blade 44
The movable blade 47 sandwiched between the movable blade 5 and the movable blade cover 46 has a hex nut 49 and a screw 50 via a rotary shaft spacer 48 provided as a center axis of rotation of the oscillating motion of rubbing with the fixed blade 44, Further, a swing shaft provided outside the center axis of rotation is provided with a flat head screw 53 through a swing shaft spacer 52 arranged in a direction perpendicular to the longitudinal movement direction of the sliding plate 51 and alternately. And a hexagon nut 54. With this mechanism, the rotation of the eccentric cam is converted into a reciprocating motion in the forward and backward directions by a sliding plate 51 sandwiched around the entire rotary shaft spacer 48, and further converted into a reciprocating rocking motion of the movable blade 47. They perform opening and closing [cutting] movements similar to scissors.

[0016]

According to the present invention, (1). By replacing two types of blades and attaching and removing,
It can be shared by a single body of a lawn mower clipper and a foliage trimming hedge trimmer. (2). The two types of blades can be attached and detached and replaced without screwing. (3). Since cutting like scissors is performed with two upper and lower movable blades having excellent cutting ability, the cutting amount and the cutting width can be made larger, so that the cutting time can be reduced. (4). When replacing the blade, there is no need to directly grasp and move the blade edge of the movable blade or the eccentric cam, so that it is possible to reduce injuries to hands and fingers and dirt with oil. (5). The blade that has been partially lost can reduce waste by replacing only the lost blade without replacing the entire blade.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an electric hedge trimmer according to an embodiment of the present invention, in which a blade portion is partially sectioned.

FIG. 2 is a bottom view of the embodiment of FIG.

FIG. 3 is a side sectional view of a main part of the embodiment of FIG. 2;

FIG. 4 is a bottom view of the embodiment of the electric hair clipper of the present invention.

FIG. 5 is a side sectional view of a main part of the embodiment of FIG. 4;

FIG. 6 is an external perspective view of a partially cut-away portion of a blade portion in a modified embodiment of the electric hedge trimmer of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body case [Example for hedge trimmer] 2 Auxiliary handle 3 Hand guard 4 Slot of main body case 5 Push coil spring a 6 Hook holder (it is a catch receiving part) 7 Manual knob 8 Power cord 9 Final deceleration gear 10 Eccentric cam 11 Push coil spring b 12 Screw a 13 Sliding plate 14 Movable upper blade 15 Movable lower blade 16 Movable blade cover 17 Movable blade mounting plate 18 Hex nut a 19 Screw b 20 Rotating shaft spacer 21 Oscillating shaft spacer 22 Countersunk screw a 23 Hex nut b 24 Hook (which is a locking portion) 25 Tip part of sliding plate 13 26 Fixed blade a 27 Fixed blade b 28 Movable blade upper cover for clipper [Example for clipper] 29 Movable blade mounting lower plate for clipper 30 Rotation axis Spacer 31 Swing plate 32 Sliding plate 33 Movable upper blade 34 Movable lower blade 35 Swing shaft spacer 36 Countersunk screw b 37 Hex C 38 Hex nut d 39 Screw c 40 Oscillating shaft screw 41 Main body case [Modified embodiment of hedge trimmer] 42 Auxiliary handle 43 Hand guard 44 Fixed blade 45 Movable blade mounting plate 46 Movable blade cover 47 Movable blade 48 Rotary shaft spacer 49 Hex nut 50 Screw 51 Sliding plate 52 Oscillating shaft spacer 53 Countersunk screw 54 Hex nut

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[Procedure amendment]

[Submission date] June 25, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

[Title of the Invention] Gardening pruning machine

Claims (3)

[Claims] An eccentric cam, which is urged by a spring and can move up and down in a main body case, is provided on a part of a final gear that rotationally transmits the motion of a drive source. After engaging with a part of the case, the other end is suppressed to the main body case, so that the locking portion provided on the cutting blade assembly is provided at an appropriate position of the main body case, and a spring-loaded locking receiver is provided. After the cutting blade assembly is fixed by fitting into the part, the one end of the sliding plate provided for oscillating and reciprocating the movable blade is manually slid so that the long hole of the sliding plate is The product is assembled by being fitted to the eccentric cam, and is connected to the locking receiving portion of the main body case, and the manual knob provided on the outer surface of the main body case is moved to lock the locking portion by the spring. That the power is released and the cutting knife assembly can be removed. Characterized pruning machine. 2. A pair of upper and lower movable blades mounted on a movable blade mounting plate are in a direction perpendicular to a reciprocating sliding motion of a sliding plate sandwiched around a center axis of each swinging motion. The movable blades are converted into mutually opposing oscillating movements by a swinging shaft arranged alternately and outside the center axis to perform a cutting action. 3. A movable blade mounted on a movable blade mounting plate also serving as a fixed blade, in a direction perpendicular to the reciprocating sliding motion of a sliding plate sandwiched around a central axis of the swinging motion. A mowing machine in which the movable blades are converted into oscillating motions by oscillating shafts arranged outside the central axis to perform a cutting action.