JPH0724035Y2 - Saw for branch cutting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw for cutting a tree, mainly for pushing and pulling by hand to grind the branches of trees.

[0002]

2. Description of the Related Art Conventionally, there has been nothing special about this type of saw, in other words, a normal saw in which a handle is attached to a saw blade in which many blades are engraved on a thin steel plate. It was offered only.

[0003]

[Problems to be solved by the invention] By the way, when a tree branch is ground with a saw having only such a saw blade and a handle, the branch of the tree, which is an object to be cut, also swings as the saw is pushed and pulled. Therefore, even if sufficient force is applied to the folding saw, it will not be transmitted to the tree reliably and effectively, and even if the relatively immovable branches that are relatively close to the trunk of the tree are ground, As the saw blade swings sideways at a right angle to the surface to be cut along with the reciprocating movement, coarse unevenness is generated on the surface to be cut, and the saw blade bends with the generation of a large amount of chips. The cutting resistance is increased, which hinders smooth cutting work.

Further, since the operation is carried out by gripping only one end of the saw handle, the operability is poor, and even if a force is applied, a large cutting force is not generated and the working efficiency is lowered. Problems such as occurred.

An object of the present invention is to provide a branch cutting saw that solves the above problems.

[0006]

SUMMARY OF THE INVENTION A branch cutting saw according to the present invention comprises a saw blade 1 and a grip tube 3 longitudinally penetrating a saw blade guide groove 2 slidably guiding the saw blade 1. And the gripper 3
A handle portion 4 which is continuously provided on the saw blade 1 so as to be located at the rear portion thereof.
And a saw blade 1 having a saw blade 1 inserted into a saw blade guide groove 2 so that the saw blade 1 can be pushed and pulled.
An object holding member 6 is provided at a substantially opposed position spaced from the saw blade 1 by an appropriate distance. When sawing, the object to be cut holding member 6 is inserted between the saw blade 1 and the object holding member 6. The cutting object 7 is characterized in that it can be held so as not to escape.

Here, the cut object holding member 6 is not particularly limited as long as it can hold the cut object 7, but in addition to a sawtooth shape, various notches such as a wave shape, a pulse shape or a trapezoidal shape. A metal plate or the like is preferable.

[0008]

When the branch cutting saw according to the present invention is used, the saw 8 is first brought close to the object 7 such as a tree branch, and the object 7 is held by the saw blade 1 and the object. It is inserted between the member 6 and the member 6. Then, the operator holds the handle portion 4 with one hand (usually the right hand) and grasps the grip tube 3 and the workpiece holding member 6 with the other hand as shown by the chain double-dashed line in FIG. The object 7 is held in a state of being sandwiched by the saw blade 1 and the object holding member 6 so that the object 7 does not escape from between these.

Next, the saw blade 1 is attached to the saw blade guide groove 2 of the grip cylinder 3.
When the saw blade 1 is pushed and pulled along, the saw blade 1 is guided by the saw blade guide groove 2 to cut the workpiece 7 without causing any bending, and as the cutting progresses, the saw blade 1 always moves. The object 7 to be cut is gradually deeply cut while being pressed against the upper edge of the saw blade guide groove 2, and eventually the cutting operation is completed. As soon as the cutting operation of the object to be cut 7 is completed, the object to be cut 7 is automatically released from the holding between the saw blade 1 and the object to be cut holding member 6, and at the same time, the pushing and pulling operation by the saw 8 is performed. To stop. When the grip between the grip cylinder 3 and the object holding member 6 is released, the original state is restored.

[0010]

As is apparent from the above description, the branch cutting saw according to the present invention is fixed so that the object to be cut does not swing when the saw is pushed and pulled, so that the force applied to the saw is fixed. Is transmitted to the object to be cut reliably and effectively.

Further, since the saw blade is always guided and slid along the saw blade guide groove of the grip cylinder, the saw blade oscillates in the lateral direction perpendicular to the surface to be cut of the object to be cut. Is prevented from doing. Therefore, the object to be cut becomes a clean surface without rough irregularities on the surface to be cut, so you do not have to hurt the tree unnecessarily and the cutting chips generated can be minimized to reduce cutting resistance. Can be done. Then, even with a thin saw blade, smooth cutting work is promoted without bending or breaking.

Further, as in the conventional case, instead of gripping only one part of one end of the saw handle, the saw is pushed while firmly gripping the grip barrel in front of the handle, so that the grip barrel is more responsive. Further power can be added to improve operability.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. 1 to 3 show one embodiment of a saw for branching according to the present invention, FIG. 1 is a front view showing the entire saw, and FIG. 2 is a sectional view as seen from the direction of arrows II-II in FIG. FIG. 3 is a cut end view taken along the line IV-IV in FIG.

In these figures, a branch cutting saw 8 according to the present invention is made of a saw blade 1 and a hard synthetic resin having a substantially rectangular cross section, and is capable of slidably guiding the saw blade 1. A grip cylinder 3 that penetrates the guide groove 2 in the longitudinal direction, and a screw 1 on the saw blade 1 so as to be located at the rear portion of the grip cylinder 3.
It is provided with a handle 4 made of wood or synthetic resin, which is connected in series with 0 and 10.

The saw blade 1 has a guide portion having no tooth portion substantially in the longitudinal direction of the saw blade guide groove 2 and a portion having a tooth portion carved in the portion protruding from the grip tube 3. The blade span of the saw 1 which is inserted into the saw blade guide groove 2 has a sufficient length such that the saw blade 1 can always face the object to be cut 7 when pushing and pulling the saw blade 1 (in this embodiment). , The length of the saw blade 1 protruding forward from the grip cylinder 3 is about 20.
It is about cm).

The cross section of the saw blade guide groove 2 is a thin groove portion 2a formed to have a thickness substantially equal to or slightly wider than the thickness of the saw blade 1 so that the saw blade 1 inserted therein can slide.
And a thick groove portion 2b formed continuously with the narrow groove portion 2a. In other words, when pushing and pulling the saw blade 1,
The tooth portion of the saw blade 1 can be smoothly slid without coming into contact with the saw blade guide groove 2.

The grip cylinder 3 is formed on a bifurcated bearing 11 having a slightly protruding rear end on the tooth side of the saw blade 1, and the object holding member 6 is pivoted on the bifurcated bearing 11. It is rotatably pivoted by 13.

That is, the object-to-be-cut holding member 6 has a rod-like portion 15 made of a hard synthetic resin, and a fixing pin 14 extending from a portion near the front of the rod-like portion 15 to a portion corresponding to the tip. It is composed of a large number of fixed saw-toothed metal hooks 16 and a handle 5 integrally fixed to the outside of the rod 15. A rear end of the rod-shaped portion 15 is rotatably supported by the bifurcated bearing portion 11 by a pivot shaft 13, and in the case of holding a branch of a tree which is the object to be cut 7,
First, the object holding member 6 is separated from the saw blade 1 as indicated by the chain double-dashed line 6 in FIG. 1 so that the object 7 is brought into contact with the bifurcated abutment portion 12 formed on the front surface of the grip cylinder 3. It is inserted between the grip cylinder 3 and the object holding member 6. After that, the cutting object 7 is sandwiched between the tooth portion of the saw blade 1 and the hooking portion 6b of the cutting object holding member 6, whereby the saw blade 1
The object 7 is held so as not to escape from between the object holding member 6 and the object holding member 6.

The handle 5 has a slightly flat annular shape having a size such that the four little fingers 9b can be inserted therein.
On the other hand, the outer circumference of the grip tube 3 is formed by a smooth curve along which the gripped palm extends, and as shown in FIG. 1, the thumb 9a is hung on the outer peripheral part of the grip tube 3 and the grip 5 is By inserting the little finger 9b of the book and grasping firmly, the saw blade 1
The object to be cut 7 can be held by the object to be cut holding member 6 and. Then, in this state, the handle 4 with the other hand
The object to be cut 7 is ground by grasping the object and pushing it back and forth. When the object to be cut 7 is cut, the object to be cut holding member 6 is cut.
As a result, the saw blade 1 bites into the object to be cut 7, and eventually the cutting of the object to be cut 7 ends. In this way, when the cutting of the object to be cut 7 is finished, the gripping force of the grip cylinder 3 and the object to be cut holding member 6 is relaxed, and the object to be cut holding member 6 is rotated like the original two-dot chain line. To return to the original state.

Although one embodiment of the present invention has been described above, the present invention can be variously modified without departing from the gist of the invention.
For example, in the above-described embodiment, the object to be cut 7 is held by the gripping force of fingers, but a spring (not shown) is wound around the pivot 13 to hold the object to be cut 7 on the object to be cut holding member 6. In order to prevent this, the spring force is elastically biased, and the saw blade 1 and the hook 16 are made to face each other with a slight shift so as not to collide with each other, as shown in FIG. It is possible to use two saw blades 6b arranged in parallel so that the saw blades 1 can face each other between them, if necessary.

[Brief description of drawings]

FIG. 1 is a front view showing an entire branch saw saw according to the present invention.

FIG. 2 is a cross-sectional view as seen from the direction of arrow II-II in FIG.

[Figure 3]

[Explanation of symbols]

1 Saw Blade 2a Narrow Groove 2b Thick Groove 2 Saw Blade Guide Groove 3 Grip Tube 4 Handle 5 Handle 6 Workpiece Holding Member 7 Workpiece 8 Saw 9a Thumb 9b Little Finger 10 Screw 11 Bifurcated Shaft Bearing 12 Fitting 13 Axis 14 Fixing pin 15 Bar-shaped part 16 Hooking part

Claims (4)

[Scope of utility model registration request] 1. A gripping tube 3 which penetrates a saw blade 1 and a saw blade guide groove 2 slidably guiding the saw blade 1 in the longitudinal direction.
And a handle portion 4 connected to the saw blade 1 so as to be located at the rear portion of the grip cylinder 3, and the branch cutting which inserts the saw blade 1 into the saw blade guide groove 2 so that it can be pushed and pulled. A saw for use in cutting, wherein an object holding member 6 is provided at a substantially opposite position of the saw blade 1 and at an appropriate distance from the saw blade 1, and when sawing, between the saw blade 1 and the object holding member 6. A saw for cutting off, characterized in that it is constructed so as to be able to hold the object 7 to be cut inserted between them so as not to escape. 2. The branch cutting saw according to claim 1, wherein the object holding member 6 is rotatably supported with respect to the grip cylinder 3. 3. An annular grip 5 on the object holding member 6
The saw for branch cutting according to claim 1, further comprising: 4. The branch cutting saw according to claim 1, wherein a spring force is elastically biased to hold the member to be cut 7 on the member to be cut holding member 6.