JPH11243778A - Trimming machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trimming machine in which blades are hung by a supporting plate and the supporting plate can be easily attached and detached. SOLUTION: This trimming machine has a housing 3 having an opening rid 3a, a supporting plate 11 detachably fixed in the housing 3 with a fixture 10 and a pair of blades 8 and 9 which are hung by the supporting plate 11 and reciprocally moved by a driving apparatus placed in the housing 3. In the trimming machine, the detaching-and-attaching operation part 10b of the fixture 10 is placed at the opening rid side of the supporting plate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pruning machine used for pruning trees and shaping hedges, and more particularly to a pruning machine in which a pair of reciprocating blades opposed to each other are supported by a single support plate. It is about.

[0002]

2. Description of the Related Art Conventionally, as this type of pruning machine, as shown in FIG. 6, a housing 50 in which an opening / closing lid 50b is attached to an opening of a case body 50a having an open bottom surface, Drive shaft 52, main gear 5
3, a driving device comprising a pair of eccentric cams 55, 56, a pair of upper and lower blades 57, 58 reciprocating by the driving device, and fixing screws 62
And a support plate 59 which is supported from above through the support plate, and the support plate 59 is known to be fixed in the housing 50 via a fixture 61.

More specifically, the fixing tool 61 is fixed on the upper surface of the support plate 59 by welding or the like, and is fixed in a hole 60 formed in the upper surface of the case body 50a. Insertable threaded support rod 61a
And a nut 61b that can be screwed onto the support rod 61a. The support rod 61a is inserted into the hole 60 from inside the housing 50, and the nut 61b is inserted from the upper surface side of the case body 50a.
By tightening the support plate 59, the support plate 59 is fixed in the housing 50.

[0004] In the cutting machine having such a configuration, the support plate 59 is fixed to the housing 50 by the fixture 61 including the support rod 61a and the nut 61b.
The support plate 59 can be replaced by removing the nut 61b.

[0005]

However, in the above-described conventional cutting machine, the nut 61b (corresponding to the attachment / detachment operation portion of the fixture) is located on the upper surface of the case body (the upper surface of the housing). Therefore, when attaching and detaching the support plate 59, first, the nut 61 is placed on the upper surface of the housing 50.
After removing b, the cutting machine must be inverted and the opening / closing lid 50b must be removed, and the attaching / detaching operation is complicated. That is,
In the conventional cutting machine, the removal work of the nut 61b and the opening / closing lid 5 necessary for attaching / detaching the support plate 59 are performed.
0b cannot be removed from the same direction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a mowing machine in which a blade can be easily supported by a single supporting plate. That is the task.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a pruning machine according to the present invention comprises:
A housing 3 provided with an opening / closing lid 3a, a support plate 11 removably fixed in the housing 3 via a fixture 10, and a drive supported by the support plate 11 and provided in the housing 3 In a mowing machine including a pair of blades 8 and 9 reciprocated by the device, a detachable operation portion 10b of the fixing tool 10 is arranged on the opening / closing lid side of the support plate 11.

Here, the attachment / detachment operation portion 10b of the fixture 10 means a portion for applying an external force necessary for attaching / detaching the fixture 10 when the support plate 11 is fixed to or detached from the housing 3. , For example, fixture 10
When a bolt is used, the head of the bolt corresponds to the attaching / detaching operation unit 10b.

In the trimming machine according to the present invention, when the attachment / detachment operation portion 10b of the fixture 10 for fixing the support plate 11 in the housing 3 is based on the support plate 11, the opening and closing of the support plate 11 is performed. Since it is arranged on the lid 3b side, when removing the support plate 11, after opening the opening / closing lid 3b of the housing 3, an external force is applied to the attachment / detachment operation unit as it is (without inverting the cutting machine, etc.). The fixture 10 can be removed. Therefore, the attachment / detachment work of the support plate 11 can be performed only from the direction of the opening / closing lid 3b.

Further, if the blades 8, 9 are provided with engaging portions 17 for engaging with a part of the fixture 10 in the reciprocating direction, the blades 8, 9 are reciprocated. When exercising, a part of the fixture 10 causes the blades 8,
This is preferable because the movement of the blade 9 is restricted in the reciprocating direction, and the blades 8 and 9 are less likely to shake right and left.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2,
Reference numeral 1 denotes a drive shaft for transmitting a driving force of a drive means (not shown) such as a motor. The drive shaft 1 is rotatably supported by a housing 3 via a bearing 2 and has a lower end. Is formed with a gear portion 1a. A main gear 4 is meshed with the gear portion 1a. The main gear 4 is rotatably supported by a fixed shaft 5 whose upper end is press-fitted and fixed to the housing 3. The housing 3 includes a lower opening type case body 3a and an opening / closing lid 3b for closing an opening of the case body 3a. The opening / closing lid 3b is provided with screws or the like (not shown) provided at four corners thereof. ) Detachably attached to the case body 3a.

A pair of disk-shaped eccentric cams 6 and 7 are attached to the lower surface of the main gear 4 so as to face vertically.
It is provided so as to be capable of eccentric rotational movement about the fixed shaft 5. The two eccentric cams 6 and 7 are fixed with a phase of 180 degrees. A drive device is constituted by the drive shaft 1, the main gear 4, and the eccentric cams 6, 7.

Further, the eccentric cams 6, 7 are engaged with the rear sides of blades 8, 9 having comb-shaped blades (not shown) formed on the front side, respectively. The blades 8 and 9 are engaged with the outer peripheral surfaces of the eccentric cams 6 and 7 so that the blades 8 and 9 can alternately reciprocate back and forth opposite to each other by eccentric rotation of the eccentric cams 6 and 7. (See Fig. 2)

As shown in FIG. 1, a support plate 11 is provided above the blades 8 and 9, and the blades 8 and 9 are supported by the support plate 11 while being suspended by fixing screws 13. (Supported).

The fixing screw 13 has upper and lower blades 8, 9
A spacer 15 is provided which engages with the peripheral end surfaces of the long holes 14, 14 formed in the support plate 11. The spacer 15 sets a vertical separation distance between the support plate 11 and the head 13 a of the fixing screw 13 so as to be opposed to each other. The blades 8, 9 can reciprocate back and forth.

The support plate 11 is detachably fixed to the case body 3a in the housing 3 via a fixture 10.

More specifically, a male screw portion 10a of a shaft of a bolt 10 (corresponding to a fixture) is provided on the support plate 11.
Holes 12 (corresponding to the locking portions of the fixture) are formed at two places at predetermined intervals in the reciprocating direction of the blades 8 and 9.

A female screw portion 16a capable of locking the male screw portion 10a of the bolt 10 is provided inside the upper surface of the case body 3a.
(Corresponding to a locked portion) a cylindrical fixed portion 1 provided therein
6 are protrudingly provided.

Further, at the appropriate position of the blades 8 and 9 in the housing 3 and ahead of the eccentric cams 6 and 7, the peripheral end of the head 10b of the bolt 10 (corresponding to the attachment / detachment operation section). Slot-shaped engaging portion 1 formed with a peripheral end face that engages with
7 are provided along the reciprocating direction.

The support plate 11 includes blades 8 and 9
The shaft of the bolt 10 is inserted into the long hole-shaped engaging portion 17 and the hole 12 of the support plate 11 from the lower side (opening / closing lid side) of the support plate 11, and the hexagonal hole 10c of the head 10b of the bolt 10 is By fitting a tool (not shown) such as a hexagon wrench and rotating the head 10b to screw the shaft of the bolt 10 to the fixed portion 16, the bolt 10 is attached to the case body 3a of the housing 3. ing.

Next, the use state of the pruning machine configured as described above will be described. When the drive shaft 1 is rotated by a drive means such as a motor, the rotation of the main gear 4 causes the upper and lower eccentric cams 6 and 7 to eccentrically rotate about the fixed shaft 5, and the blades 8 and 9 mutually move by the operation of the drive device. Reciprocate back and forth alternately. By reciprocating the blades 8 and 9 back and forth, a plant or the like can be pruned with a comb-like blade.

Next, when the support plate 11 is to be removed, the cover 10 is opened, and the bolt 10 (fixing tool 10) is opened.
Since the head 10b (removal operation portion 10b) is exposed, the bolt 10 can be removed by turning the head 10b using a tool such as a wrench, and the support plate 11 can be removed from the housing 3. In addition, a new support plate 11
When attaching the, it is only necessary to perform a procedure reverse to the above-described removal procedure. Thus, according to the cutting machine according to the present invention,
When attaching and detaching the support plate 11, all operations can be performed from the open / close lid 3b side of the housing 3.

Further, in the conventional cutting machine, since a nut projects from the upper surface of the housing, when the plant is cut or the like, dead grass or leaves are caught by the projected nut, and after use, However, in the case of the cutting machine of the above embodiment, since the fixing tool 10 does not protrude from the upper surface of the housing, such a problem does not occur and the appearance is preferable.

Further, the blades 8 and 9 have bolts 10
Since the long hole-shaped engaging portion 17 having a peripheral end surface engaged with the peripheral end portion of the head 10b is provided along the reciprocating direction, when the blades 8 and 9 reciprocate, The engaging portion 17 contacts the head 10b of the fixed bolt 10, and the blades 8, 9 are regulated in the direction in which the engaging portion 17 is provided.
Therefore, the blades 8 and 9 have an advantage that they reliably perform reciprocating motion.

In particular, the driving devices such as the eccentric cams 6 and 7 and the fixture 10 are provided in the housing 3, that is,
Since the driving devices such as the eccentric cams 6 and 7 and the fixture 10 are relatively close to each other, the movement of the blades 8 and 9 caused by the rotation of the eccentric cams 6 and 7 prevents the driving devices such as the eccentric cams 6 and 7 from rotating. Can be regulated in the vicinity of.

Further, two (plural) fixtures 10 are fixed along the reciprocating direction of the blades 8 and 9, and
Since the engaging portions 17 of the blades 8 and 9 are engaged with the individual fixtures 10, the engaging portions 17 are regulated at two points, so that the reciprocating motion can be performed more reliably.

In the above embodiment, the fixture 10 for fixing the support plate 11 is composed of a bolt, and the bolt is attached to the cylindrical fixed portion 16 protruding from the case body 3a. Fixture 1 for fixing plate 11
For 0, various configurations other than bolts can be adopted.

For example, as shown in FIG.
A nut 10b screwed into the threaded support rod 16a protruding from the fixed part 16 of the above, and screwed into the threaded support rod 16a from the opening / closing lid 3b side of the support plate 11 (in the attaching / detaching operation part of the fixture). The fixture 10 may be configured from the above.

As shown in FIG. 4, the leaf spring 10 is fixed to the fixed portion 16 of the case body 3a.
The elastic claw 10b which can be hooked on the surface of the support plate 11 on the side of the opening / closing lid 3b (the attaching / detaching operation part of the fixed part)
May be provided to configure the fixture 10.

In the case where the fixing device is constituted by the leaf spring 10, when the support plate 11 is attached,
When the support plate 11 is pressed, the claw portion 10b is elastically deformed and latched. On the other hand, when the support plate 11 is removed, if the claw portion 10b is pushed and expanded, the latch of the support plate 11 is released. However, since the claw portion 10b is arranged on the side of the opening / closing lid 3b of the support plate 11, removal is easy as in the above embodiment.

Further, in the above embodiment, the fixture 1
0 is a long hole-shaped engaging portion 1 provided on the blades 8 and 9.
Since it is mounted in a state inserted in 7, 17 it has the advantage of restricting the reciprocating movement of the blades 8, 9 but, for example, as shown in FIG. Also, the fixing tool 10 is covered from the opening / closing lid 3b side so that the end of the attachment / detachment operation portion 10b of the fixing tool 10 such as a bolt engages with the outer edge 17 (corresponding to an engaging portion) of the blades 8, 9. The support plate 11 may be attached by screwing to the locking portion 16. According to such a configuration, there is an advantage that it is not necessary to provide a long hole as the engaging portion 17 in the blades 8 and 9.

In the above embodiment, the fixture 10
Are provided at two places, for example, one place may be provided, or three or more places may be provided.

Further, in the above embodiment, the attachment / detachment operation portion 10b of the fixture 10 is engaged with the engagement portion 17 of the blades 8 and 9. For example, the engagement portion 10a of the fixture 10
(Corresponding to a part of the fixture) may be engaged with the engaging portions 17 of the blades 8 and 9, or a separate spacer or the like (corresponding to a part of the fixture) may be attached to the fixture 10. And the engaging portions 17 of the blades 8 and 9 may be engaged with the spacers.

[0034]

As described above, in the trimming machine according to the present invention, since the attachment / detachment operation portion of the fixture for fixing the support plate is disposed on the opening / closing lid side, it is necessary to remove the support plate. After the opening / closing lid of the housing is opened, the fixing tool can be removed without turning over the cutting machine. Accordingly, the work of attaching and detaching the support plate can be performed only from the direction of the opening / closing lid, and the work of attaching and detaching the support plate can be easily performed.

Further, according to the second aspect of the present invention, the operation of the blade is regulated in the reciprocating direction by the fixture, so that there is an advantage that the deflection of the blade can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mowing machine according to an embodiment of the present invention in a reciprocating motion direction.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an end view in the width direction of the trimming machine of the embodiment.

FIG. 4 is an end view in the width direction of the trimming machine of the embodiment.

FIG. 5A is a bottom view of the reaper of the embodiment with the open / close lid removed, and FIG. 5B is an end view in the width direction taken along the line BB of FIG.

FIG. 6 is a sectional view of a conventional cutting machine in a reciprocating motion direction.

[Explanation of symbols]

3 ... housing, 3a ... opening and closing lid, 8, 9 ... blade, 1
DESCRIPTION OF SYMBOLS 1 ... Support plate, 10 ... Fixture, 10b ... Detachment operation part, 17 ... Engagement part

Claims (2)

[Claims] 1. A housing (3) provided with an opening / closing lid (3a), a support plate (11) detachably fixed in the housing (3) via a fixture (10), and the support plate (11) and supported by the housing (3)
A cutting machine comprising a pair of blades (8) and (9) reciprocatingly driven by a driving device provided therein, the attachment / detachment operation part (10b) of the fixing tool (10) includes a support plate (11). Characterized in that it is arranged on the side of the opening / closing lid. 2. The pruning device according to claim 1, wherein the blades (8) and (9) are provided with engaging portions (17) for engaging a part of the fixture (10) in a reciprocating direction. Machine.