JP2011087506A - Saw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saw preventing peeling of a bark in cutting work, and allowing a user to easily, promptly and efficiently perform cutting work. <P>SOLUTION: The saw includes a main blade 1, a side blade 2 arranged oppositely to the main blade 1, and a spring 5 regularly triggeredly energizing so as to clasp the side blade 2 toward the main blade 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a saw.

Conventionally, as a saw used for cutting a branch, there is one in which saw blades are arranged in a straight line on a single plate-like member (see Patent Document 1).
When a branch is cut with a conventional saw, the branch to be cut may fall or hang down due to its own weight during cutting, and the bark of the branch on the remaining side may be peeled off. For this reason, a cut is made on the side opposite to the main cutting side with a saw, and the bark between the side to be cut and the side to be cut is cut in advance.

Japanese Utility Model Publication No. 62-9792

  However, in order to prevent the peeling of the bark, it has been a problem that it takes time and effort to cut into the branches separately from the main cutting. In addition, since it is necessary to position the saw on the opposite side of the pre-release separation cut and start the main cutting, it takes time to check the position of the cut and position the saw quickly. There was a problem that I could not work.

  Accordingly, an object of the present invention is to provide a saw that can prevent the bark from being peeled off during the cutting operation and can perform the cutting operation easily, quickly and efficiently.

In order to achieve the above object, the saw according to the present invention is provided with a main blade, a sub-blade disposed opposite to the main blade, and a constant impact so as to sandwich the sub-blade toward the main blade. And a spring to be energized.
In addition, the tooth alignment of the main blade and the tooth alignment of the sub blade are formed in an arc concave shape in a side view, and a bamboo leaf-shaped opening that opens to the left and right sides between the main blade and the sub blade is formed. It is.
Further, the tip of the auxiliary blade is projected longer than the tip of the main blade to form a receiving jaw type.
Further, the main blade and the sub blade are arranged with their positions shifted laterally to the left and right sides, and the main blade and the sub blade are arranged so as to overlap on the tip side in a side view.

The secondary blade is pivotally attached to a plate-like attachment piece attached in the vicinity of the proximal end of the main blade.
Alternatively, a resin mounting member on which the main blade is fixed and the sub blade is pivotally attached is provided.

  According to the saw of the present invention, the main cutting of the branch can be performed while making a cut for preventing bark peeling on the branch, and the cutting operation can be performed quickly and efficiently. Cutting can be performed from both sides so as to sandwich a member to be cut such as a branch, and cutting time can be shortened. During the cutting operation, the main blade and the auxiliary blade can be prevented from being inadvertently detached from the cutting portion being cut and can be easily cut. When cutting, it is possible to prevent the main blade and the sub blade from cutting obliquely with respect to the member to be cut, and the cutting operation can be easily performed.

It is a side view of one embodiment of the present invention. It is an operation explanatory view. It is an operation explanatory view. It is a principal part front view. It is a side view which shows an example of an attachment piece. It is an operation explanatory view. It is a use condition explanatory view of other embodiments.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
The saw of the present invention includes a main blade 1 and a sub blade 2 for cutting a member to be cut E such as a tree branch or bamboo as in the embodiment shown in FIGS.
The main blade 1 has many saw teeth 13 that can cut the member E to be cut. In a side view, the tooth arrangement F1 of the main blade 1 (the saw tooth 13) is formed in a circular arc concave shape. A base end 11 of the main blade 1 is detachably fixed to a handle member 4 gripped by a user.

A plate-shaped metal attachment piece 3 as shown in FIG. 5 is fixed in the vicinity of the base end 11 of the main blade 1 and in the vicinity of the handle member 4.
The mounting piece 3 has one side surface 3a side (see FIG. 4) in surface contact with the main blade 1 and is fixed by a bolt / nut member, and the secondary blade 2 is pivotally attached to the other side surface 3b side (see FIG. 4). . That is, the main blade 1 and the sub blade 2 are disposed with their positions shifted to the left and right sides via the mounting piece 3. Further, by attaching the attachment piece 3 to the main blade 1, the attachment piece 3 and the auxiliary blade 2 are provided detachably from the main blade 1.

  The sub-blade 2 has a large number of saw teeth 23 that can cut the member E to be cut. In the side view, the tooth arrangement F2 of the secondary blade 2 (the sawtooth 23) is formed in a circular arc concave shape. The secondary blade 2 is disposed opposite to the main blade 1. That is, the saw blades 23 of the secondary blade 2 are disposed so as to face the saw blades 13 of the main blade 1 in a side view. Further, in the natural state (cutting work standby state) shown in FIG. 1, the tip 20 of the sub-blade 2 protrudes longer than the tip 10 of the main blade 1 to form a receiving jaw shape. In other words, the tip 20 of the secondary blade 2 has a receiving jaw portion 22 that protrudes in the tip direction from the main blade 1.

  Further, in the natural state, the main blade 1 and the sub blade 2 are overlapped in a side view on the tip side of the saw. Further, between the saw blade 13 of the main blade 1 and the saw blade 23 of the sub blade 2, a bamboo leaf-shaped opening 6 that opens to the left and right sides is formed. Note that the leaf shape of a bamboo shoot can be said to be a shape of a circle having a center at a position apart from each other and a portion where the circles overlap.

And the spring 5 which always urges and energizes so that the subblade 2 may be pinched | interposed toward the main blade 1 is provided. The spring 5 has one end 5 a attached to the mounting piece 3 and the other end 5 b attached to the auxiliary blade 2.
Specifically, the spring 5 is formed of a torsion coil spring, and is provided in a winding shape on a pivot shaft member 9 that pivotally attaches the auxiliary blade 2 to the attachment piece 3. One end 5 a of the spring 5 is bent and inserted into an insertion hole 51 formed in the attachment piece 3 to be locked. The other end 5 b of the spring 5 is bent and inserted into and locked in a locking hole 52 formed in the auxiliary blade 2.

  In addition, a plurality of types of springs with different wire diameters and materials (a set of springs with different elasticity) are provided. The spring 5 can be exchanged by attaching and detaching the pivot shaft member 9 and is alternatively attached from a plurality of types of springs having different elasticity. That is, the force (the clamping force between the main blade 1 and the sub blade 2) for pressing the sub blade 2 against the member E to be cut is provided to be adjustable.

  Further, a stopper portion 31 is provided for restricting the swing of the auxiliary blade 2 around the pivot axis L that is sandwiched toward the main blade 1. The stopper portion 31 protrudes from the attachment piece 3 and is disposed in the vicinity of the base end 21 of the auxiliary blade 2. By contacting the contact surface 21a formed at the base end 21 of the secondary blade 2, the main blade 1 and the secondary blade 2 are overlapped at the tip in the side view, and the main blade 1 and the secondary blade 2 are viewed from the side X. The secondary blade 2 is disposed so as to restrict the swing of the secondary blade 2 at a position that does not intersect the character.

  That is, in the natural state shown in FIG. 1, the secondary blade 2 is prevented from swinging in the direction in which the opening 6 is opened by the spring 5, and the secondary blade 2 and the main blade 1 are passed by the stopper portion 31 in a side view. Oscillations that cross in a letter shape are prevented.

Moreover, as shown in FIG. 6, the elastic force (sub blade 2) of the spring 5 is set so that the sub cutting range S2 to be cut by the sub blade 2 is 5 to 30% of the cross section of the member E to be cut. Is preferably set to the member E to be cut. In other words, it is preferable to set the elastic force of the spring 5 so that the main cutting range S1 cut by the main blade 1 is 70 to 95% of the whole.
By setting the spring force of the spring 5 so that the sub cutting range S2 is 30% or less of the whole, the user can smoothly and comfortably press the main blade 1 without feeling uncomfortable with the cutting resistance of the sub blade 2. It can be pushed and pulled. Further, by setting the elastic force of the spring 5 so that the sub-cutting range S2 is 5% or more of the whole, the cutting operation can be performed quickly and the bark can be cut reliably.

The use method (action) of the saw of the present invention described above will be described.
First, in the member E to be cut, if the side where the main blade 1 is desired to start cutting is referred to as the one surface Ea side, the tip of the secondary blade 2 is placed on the other surface Eb side of the member E to be cut as shown in FIG. 20 (receiving jaw 22) is brought into contact. Then, as shown in FIG. 2, when the handle member 4 is moved to one side or is swung around the pivot axis L, the tip 10 of the main blade 1 and the tip 20 of the sub-blade 2 that overlap each other are overlapped. Opens apart.

  When the base edges 11 and 21 of the main blade 1 and the auxiliary blade 2 are brought close to the member to be cut E along the member to be cut E along the auxiliary blade 2, as shown in FIG. It is smoothly arranged between the saw blade 13 of the blade 1 and the saw blade 23 of the sub blade 2. The secondary blade 2 is pressed against the other surface Eb side by the spring 5 and serves with the main blade 1 to sandwich the member E to be cut.

  When the user pushes and pulls the handle member 4, the main blade 1 starts main cutting on the one surface Ea side of the member E to be cut. At this time, since the secondary blade 2 is pressed against the member E by the spring 5, the other surface Eb side is cut along with the push-pull movement of the main blade 1. That is, the member E to be cut is cut from both sides (one surface Ea side and the other surface Eb side).

  Here, in the case of a conventional saw, when cutting, the cut member E on the side to be cut falls or hangs down by its own weight, and peels off the bark of the cut member E on the side to be left. Therefore, it is necessary to make a cut in advance on the other surface Eb side to cut the bark, and then perform the main cutting from the one surface Ea side.

  However, since the saw of the present invention cuts the member E to be cut from both sides, substantially simultaneously with the start of the main cutting on the one surface Ea side by the main blade 1, the sub blade 2 is used to prevent bark peeling on the other surface Eb side. A cut is made. Moreover, since the main blade 1 is reliably disposed on the substantially opposite side of the cut for preventing bark peeling, labor and time such as alignment are omitted.

  In addition, the secondary blade 2 is pressed against the other surface Eb by the spring 5 and the member E to be cut is cut between the main blade 1 and the secondary blade 2 so that the main blade 1 and the secondary blade 2 are cut in the middle of cutting. Prevent inadvertent separation from the department. Further, the main blade 1 or the sub-blade 2 is prevented from sleeping (falling down) and being cut obliquely with respect to the member E to be cut, and the member E is easily and quickly cut efficiently. Moreover, if the attachment piece 3 is removed from the main blade 1, the sub-blade 2 and the spring 5 are removed integrally, and it can be used as a saw only for the main blade 1.

Next, another embodiment shown in FIG. 7 will be described.
A resin mounting member 7 is provided to which the main blade 1 is fixed and the sub blade 2 is pivotally attached. The attachment member 7 has a stopper portion 31 and has one end 5a of the spring 5 attached thereto. The other end 5 b of the spring 5 is attached to the auxiliary blade 2. That is, in the cutting operation of the member E to be cut, the above-described action similar to that of the embodiment can be obtained. The base ends 11 and 21 of the main blade 1 and the sub blade 2 are disposed in the internal space of the mounting member 7. Further, the spring 5 may be built in the mounting member 7.

  An operating rod 8 for cutting the cut member E at a high place is connected to the mounting member 7. The operation rod 8 is provided to be extendable and contractible. A plurality of operation rods 8 can be connected, and the length can be freely adjusted. By providing the operation rod 8, it is most suitable for cutting work of tall tree branches.

  In the present invention, the design can be changed, and the tooth arrangements F1 and F2 may be formed linearly. Further, a mechanism or a member capable of adjusting the strength of the elastic force of the spring 5 may be provided. The spring 5 may be a tension coil spring or a compression coil spring. The attachment piece 3 may be welded to the main blade 1. The attachment piece 3 may be in the vicinity of the base end 11 of the main blade 1, and the attachment piece 3 may be made of resin and fixed to the handle member 4. Further, the receiving jaw portion 22 is free whether or not the saw blade 23 is formed. Moreover, you may provide the handle member 4 of one Embodiment so that connection with the operation rod 8 of other embodiment is possible.

  As described above, the saw according to the present invention is constantly elastically energized so as to sandwich the main blade 1, the sub-blade 2 disposed opposite to the main blade 1, and the sub-blade 2 toward the main blade 1. Since the cutting member E is provided, the cutting member E is cut from both sides (one surface Ea side and the other surface Eb side) so as to shorten the cutting time. During the cutting operation, it is possible to prevent the main blade 1 and the sub blade 2 from being detached from the cut portion in the middle of cutting. Further, it is possible to prevent the main blade 1 or the sub blade 2 from lying down (falling down) and inclining into the member E to be cut. In addition, when the member to be cut E is a branch or a tree, the cut bark is cut by the secondary blade 2 even if the member E to be cut falls or hangs down to the secondary blade 2 side. Therefore, peeling of the bark that peels off the bark of the cut member E on the side to be left can be prevented. The set-up operation for making a cut for preventing bark peeling can be performed almost simultaneously with the main cutting, and the work efficiency can be improved. The positional relationship between the cut portion of the main cutting and the cut for preventing bark peeling is maintained in an appropriate state, and peeling of the bark can be reliably prevented.

  Further, the tooth arrangement F1 of the main blade 1 and the tooth arrangement F2 of the sub-blade 2 are formed in an arc concave shape in a side view, and a bamboo leaf-shaped opening 6 that opens to the left and right sides between the main blade 1 and the sub-blade 2 is formed. Since it formed, the main blade 1 and the subblade 2 can contact stably and can cut | disconnect smoothly so that outer periphery, such as a branch, may be followed. The members to be cut E having various sizes can be reliably cut in a sandwiched manner.

  In addition, since the tip 20 of the secondary blade 2 protrudes longer than the tip 10 of the main blade 1 to form a receiving jaw, it is safe and easy without the user touching the main blade 1 or the secondary blade 2. In addition, the main blade 1 and the sub blade 2 can be opened apart from each other so that work can be performed quickly. The secondary blade 2 can be used as a guide member, and the member E to be cut can be smoothly disposed between the main blade 1 and the secondary blade 2.

  In addition, the main blade 1 and the sub blade 2 are arranged with their positions shifted to the left and right sides, and the main blade 1 and the sub blade 2 are disposed so as to overlap on the tip side in a side view. The incision part by and the incision part by the sub blade 2 can be made to overlap in a side view, and the member E to be cut can be cut reliably. Moreover, even if the member E to be cut has a small diameter, it can be cut reliably. Wear and chipping due to contact between the saw blade 13 of the main blade 1 and the saw blade 23 of the sub blade 2 can be prevented, and durability can be improved.

  Moreover, since the subblade 2 is pivotally attached to the plate-shaped attachment piece 3 attached to the base end 11 vicinity of the main blade 1, the subblade 2 can be provided in the main blade 1 easily and cheaply. . Moreover, the saw of this invention which has the subblade 2 can be obtained easily by adhering the attachment piece 3 to the conventional saw. In other words, the auxiliary blade 2 can be easily detached by removing the mounting piece 3 from the main blade 1 and can be used as a saw with only the main blade 1.

  Further, since the resin mounting member 7 to which the main blade 1 is fixed and the sub blade 2 is pivotally attached is provided, the number of parts can be reduced and the weight can be reduced. The position of the sub blade 2 can be more accurately arranged with respect to the main blade 1.

1 Main blade 2 Sub blade 3 Mounting piece 5 Spring 6 Opening 7 Mounting member
10 Tip of main blade
11 Base end (of main blade)
20 Front edge F1 (secondary blade) tooth alignment F2 (secondary blade) tooth alignment

Claims (6)

  The main blade (1), the auxiliary blade (2) disposed opposite to the main blade (1), and the secondary blade (2) are always elastic so as to sandwich the auxiliary blade (2) toward the main blade (1). A saw characterized by comprising a spring (5) for biasing.   The tooth arrangement (F1) of the main blade (1) and the tooth arrangement (F2) of the sub-blade (2) are formed in an arc concave shape in a side view, and between the main blade (1) and the sub-blade (2). The saw according to claim 1, wherein a leaf-like opening (6) is formed that opens to the left and right.   The saw according to claim 1 or 2, wherein the tip (20) of the sub-blade (2) protrudes longer than the tip (10) of the main blade (1) to form a receiving jaw type.   The main blade (1) and the sub-blade (2) are disposed with their positions shifted to the left and right sides, and the main blade (1) and the sub-blade (2) overlap on the tip side in a side view. The saw according to claim 1, 2 or 3, arranged as described above.   The said secondary blade (2) is pivotally attached to the plate-shaped attachment piece (3) attached to the base end (11) vicinity of the said main blade (1), Claim 1, 2, 3, or 4 Saw.   The saw according to claim 1, 2, 3 or 4, further comprising a resin mounting member (7) to which the main blade (1) is fixed and to which the sub blade (2) is pivotally attached.

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