JPH04293412A - Dustproof device in branch pruner or the like - Google Patents

Abstract

PURPOSE:To obtain a dustproof device capable of preventing foreign materials from entering the interior of a reaping blade driving case during operation in a branch pruner, a ridge grass mower, etc. CONSTITUTION:In a branch pruner 1, etc., equipped with reaping blades 4, reciprocating in the longitudinal direction of the blade body and projected from a reaping blade driving case 2 and a dustproof felt 16, engaged and inserted so as to surround the base part of reaping blades 4 in the reaping blade driving case 2 in parts where the reaping blades are projected, a felt 17, surrounding the base part (4a) of the reaping blades and enabling observation on a part of the aforementioned felt 17 joined to the base part (4a) of the reaping blades from the outside is arranged on the outside of the reaping blade driving case 2 where the above-mentioned dustproof felt 16 is engaged and inserted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust prevention device for a pruning machine, a ridge mower, etc., which prevents foreign matter from entering the cutting blade drive case during operation.

0002

[Prior Art] Conventionally, a cutting blade that reciprocates in the length direction of the blade protrudes from a cutting blade drive case, and the base of the cutting blade is enclosed within the cutting blade drive case at the portion where the cutting blade protrudes. There are known pruners, ridge mowers, etc. in which dust-proof felt is inserted. The felt is used to prevent twigs, dust, dirt, water drops, etc. from entering the cutting blade drive case during work.

0003

[Problems to be Solved by the Invention] However, when pruning hedges, garden trees, etc. with the above-mentioned conventional pruning machine with the cutting blade facing upward, fine branches, dust, dirt, water droplets, etc.
It was easy to get into the blade drive case through the joint (sliding contact) between the felt and the base of the blade. Further, when mowing work is performed with the cutting blade of the ridge mower in a horizontal position, dirt, water droplets, etc. are particularly likely to enter the mower drive case.

[0004]The foreign matter that once entered the cutting blade drive case was not discharged to the outside. For this reason,
The rotary drive unit at the base of the cutting blade was damaged. In particular, when pruning tea plants with dew on a pruner, water enters the blade drive case and accumulates, eventually damaging the rotary drive part (specifically, the bearing) at the base of the blade. There was a problem that they could get in and damage it or cause it to rust. Furthermore, when dirt enters the cutting blade drive case, the felt is worn out and the gap between the felt and the base of the cutting blade becomes larger, resulting in even more foreign matter entering the case. The worn state of the felt could not be observed from outside the cutting blade drive case. The present invention has been made to solve the various problems mentioned above.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention protrudes a cutting blade that reciprocates in the length direction of the blade body from a cutting blade drive case, and provides a portion from which the cutting blade projects. In a pruning machine, etc., in which a dustproof felt is inserted into the cutting blade drive case so as to surround the base of the cutting blade, the base of the cutting blade is placed outside of the cutting blade drive case in which the dustproof felt is inserted. It is characterized by the fact that it is surrounded by felt, which allows the joint part with the base of the cutting blade to be observed from the outside.

[0006]

[Operation] With the above structure, the dustproof device for a pruning machine, etc. of the present invention surrounds the base of the cutting blade on the outside of the cutting blade drive case into which dustproof felt is inserted, and connects the base of the cutting blade from the outside. Since the felt is provided so that the joint part of the blade can be observed, the intrusion of foreign matter is prevented at the first stage by the felt, and furthermore, the felt inserted into the cutting blade drive case prevents the intrusion at the second stage. This prevents foreign matter from entering the cutting blade drive case. Also, when it is observed that the outer felt is worn and the gap between the felt and the base of the cutting blade becomes large, the felt is replaced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a pruning machine, and this pruning machine 1 has a cutting blade support arm 3 protruding from a cutting blade drive case 2 which also serves as a main body frame. A reciprocating type cutting blade 4, which is composed of a pair of upper and lower blade bodies and has a double-edged cutting blade, is supported so as to reciprocate in the length direction. A variable speed transmission case 5 is integrally provided above the cutting blade drive case 2, and an engine 6 is mounted on the variable speed transmission case 5 so that its output shaft is directly connected. Engine 6 above
On the front side of the blade drive case 2, a handle support 7 is supported so as to be horizontally rotatable by a chrysanthemum seat 8 and a knob 9.
The base of the first handle 11 is supported so as to be rotatable in the vertical direction. A second handle 13 is supported at the tip of the first handle 11 via a chrysanthemum seat 12 and a grip/stay 14 so as to be rotatable in the vertical direction.

The portion of the cutting blade 4 protruding from the cutting blade drive case 2 is not provided with a cutting blade and forms a base 4a, and the cutting blade drive case 2 accommodates this base 4a.
A felt case 15 is provided in the felt case 1.
A dust-proof interior felt 16 is fitted into the interior of the mower 5 so as to surround the base 4a of the cutting blade. The above configuration is similar to a conventionally known configuration.

On the outside of the felt case 15 into which the interior felt 16 is fitted, there is an exterior felt 17 that surrounds the base 4a of the cutting blade and allows the joint portion with the base 4a of the cutting blade to be observed from the outside. Holder 18, screw 1
It is arranged so that it can be attached and detached via 9. When it is observed that the exterior felt 17 is worn out due to the operation of the pruning machine 1 and the gap between the sliding contact area between the exterior felt 17 and the base 4a of the cutting blade becomes large, the screws 19 are loosened. The felt holder 18 is removed and the worn felt is replaced. The reference numeral 20 is a sled body used to slide on the ground when mowing grass on a bank, and the reference numeral 21 is a throttle lever of the engine 6.

An embodiment of the pruning machine 1 constructed as described above
When the engine 6 is operated during work, the speed is changed in the transmission case 5, and the cutting blade drive case 2
It is transmitted to the cam mechanism via the centrifugal clutch inside to cause the cutting blade 4 to reciprocate. The rotational speed of the engine 6 is adjusted by a throttle lever 21. Before starting work,
The angle of the handle 11 is adjusted in the horizontal and vertical directions using the knob 9, the chrysanthemum seat 8, and the chrysanthemum seat 10, and the angle of the second handle 13 is adjusted with respect to the first handle 11 using the chrysanthemum seat 12, Adjust the handle to the most appropriate posture depending on the work to be performed. This allows the worker to work in a comfortable posture and with less fatigue.

The cutting blade 4 slides at a high speed of approximately 1500 rpm, and the base 4a of the cutting blade, the inner felt 16 fitted into the felt case 15, and the outer felt 17 supported by the felt holder 18 are connected to each other. As a result of the sliding contact, the first stage exterior felt 17 prevents foreign matter from entering, and the interior felt 16 prevents foreign matter from entering the second stage, so that almost all foreign matter is prevented from entering the cutting blade drive case 2. Ru. When it is observed that the exterior felt 17 is worn and the gap between the exterior felt 17 and the base 4a of the cutting blade becomes large, the screw 19 is loosened, the felt holder 18 is removed, and the worn felt is replaced. Note that the interior felt 16 may be replaced periodically depending on the usage time of the pruning machine. The dust prevention device of the present invention is not limited to the pruning machine of the above embodiment, but can be similarly applied to a ridge mower and the like.

0012

As explained above, according to the dust-proof device for a pruning machine or the like of the present invention, a felt 16 is fitted on the outside of the cutting blade drive case 2, surrounding the base 4a of the cutting blade, and mowing from the outside. Since the felt 17 is provided so that the joint part with the blade base 4a can be observed, the entry of foreign matter into the cutting blade drive case 2 is doubly prevented by the felts 17 and 16, and the cutting blade drive case 2 is prevented from entering the cutting blade drive case 2. 2. Almost no intrusion into the interior. Therefore, the rotational drive section of the cutting blade 4 will not be damaged. In addition, the felt 17 can be easily attached, detached, and replaced.
7 can be easily removed. Furthermore, the degree of wear of the felt 17 can be judged from the outside, and by timely replacement, the wear of the felt 16 can be reduced, and foreign matter can be prevented from entering into the cutting blade drive case 2.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of the present invention.

FIG. 2 is an exploded and assembled perspective view of the main parts.

FIG. 3 is a perspective view of the entire pruning machine to which the present invention is applied.

FIG. 4 is an exploded and assembled perspective view of the same configuration as the conventional one.

[Explanation of symbols] 1　Pruning machine 2　Mower blade drive case 3　Mower blade support arm 4. Cutting blade 4a Base of cutting blade 5　Shift transmission case 6 Engine 7 Handle support 8, 10, 12 Chrysanthemum 9 Knob 11 First handle 13 Second handle 14 Grip part and stay 15 Felt case 16 Interior felt 17 Exterior felt 18 Felt holder 19 Screw 20 Sled body 21 Throttle lever

Claims (1)

[Claims] Claim 1: A cutting blade that reciprocates in the length direction of the blade protrudes from the cutting blade drive case, and a dust-proof device is installed in the cutting blade drive case at the portion where the cutting blade protrudes so as to surround the base of the cutting blade. In a pruning machine, etc., in which the dust-proof felt is inserted, the part surrounding the base of the cutting blade and connected to the base of the cutting blade is observed from the outside of the cutting blade drive case in which the above-mentioned dust-proof felt is inserted. A dust-proofing device for a pruning machine, etc., characterized in that it is equipped with felt that allows the dust to be removed.