JPH02255004A - Sickle - Google Patents

Abstract

PURPOSE:To obtain a sickle capable of changing an attaching angle of a blade to a handle and readily exchanging a blade by equipping a blade retaining part of the handle with a small protrusion to be engaged with at least one of plural small recessed parts formed at the root of the blade. CONSTITUTION:A protrusion 22 of angle decision projecting from an engaging face 21 of a bent part 15 curved at a given angle from the length direction of a handle is engaged with any of recessed parts 35a, 35b and 35c formed at the edge of a root 32 of a blade 13 to change an attaching angle of the blade to the handle.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sickle, and particularly to an improvement in the attachment structure between the sickle body and the sickle handle.

<Prior Art> FIGS. 7A and 7B are a front view and a right side view, respectively, of a conventional common sickle.

In the conventional sickle 1, a notch 3 is formed at the tip of a rod-shaped sickle handle 2 made of wood, a core 5 of the sickle 4 is inserted into the notch 3, and a peg 6 is inserted from above the sickle handle 2. The cap 9 is fitted into the tip of the sickle handle 2 as it is driven in. The base 8 of the sickle blade 4 is bent so that the blade portion 7 is inclined by a certain angle α with respect to the length direction of the sickle handle 2. In this way, by bending the base 8 and tilting the blade portion 7 with respect to the sickle handle 2, the operability of the sickle 1 is improved.

<Problems to be Solved by the Invention> The conventional sickle 1 configured as described above has the following drawbacks. In other words, ■ The base 8 of the sickle 4 must be bent, and the sickle 4 must be bent.
The number of manufacturing processes is large.

In addition, the sickle body 4 is attached to the sickle handle 2,
Since it is best that the angle of the blade part 7 to the length direction of the sickle handle 2 is α, in order to manufacture a good sickle, after attaching the sickle body 4 to the sickle handle 1, It was necessary to correct the bend. This is because, due to variations in the notches 3 formed on the sickle handle 1, no matter how uniform the bending angle of the base 8 of the sickle body 4, when attached to the sickle handle 1, the inclination angle will not always be the same. This is because it is not necessarily α.

■ When the cutting edge becomes bad, you can simply sharpen the blade 7, but since the sickle body 4 has a long sickle handle 2, it is difficult to sharpen it, and in reality, when the cutting edge becomes bad, you should just throw it away. Many users are looking for a new sickle.

■ Since the sickle handle 2 is made of wood, if it is used for a long period of time, a gap may occur between the notch 3 and the core 5, and the sickle blade 4 may shake.

Furthermore, since the surface of the sickle handle 2 is smooth, there is also the drawback that the sickle handle 2 is easily slippery when the user's hands are sweaty or when used with gloved hands.

Of course, a non-slip pad made of rubber or the like may be pasted on the surface of the sickle handle 2, but this is not cost effective. This is because the life of the conventional sickle 1 ends when the sickle blade 4 loses its sharpness, so troublesome treatments such as pasting anti-slip material on the sickle handle 2 are necessary. , because they couldn't afford to raise the price.

Therefore, the applicant of the present application first filed the patent application No. 63-139071.
In this paper, we proposed a new sickle handle and a replaceable blade type sickle using the sickle handle, but this invention is a further improvement of the previously proposed replaceable blade type sickle, and it is easy to change the sickle blade and is easy to use. The purpose is to provide an easy-to-use sickle.

Means for Solving the Problems> The present invention has a sickle body which is flat as a whole, a tip portion of which is bent at a predetermined angle with respect to the length direction of the handle, and the sickle body can be detachably held at the tip portion. A sickle comprising a sickle handle provided with a holding structure, wherein a mounting hole is formed at the base of the sickle body, and a plurality of small recesses are formed at the base of the sickle body so as to be scattered on an arc centered on the mounting hole. is formed, and the holding structure includes a mounting shaft that is inserted into a mounting hole formed at the base of the sickle blade, and at least one small protrusion that can engage with the plurality of small recesses. The sickle is characterized in that the attaching angle of the sickle body to the sickle handle can be changed by selecting a small recess which is provided with the small projection and is engaged with the small protrusion.

Further, in the sickle, the base of the sickle body is formed in a substantially arc shape in a plan view, and the plurality of small recesses include a plurality of recess notches formed along the edge of the base. It is characterized by being

Further, the present invention provides a sickle having a sickle body that is flat as a whole, a tip portion bent at a predetermined angle with respect to the length direction of the handle, and a holding structure that can detachably hold the sickle body at the tip portion. A sickle having a handle, wherein a mounting hole is formed at the base of the sickle body, and at least one small protrusion is provided at a position spaced a predetermined distance from the mounting hole, and the holding structure has a mounting hole. , is provided with a mounting shaft that is inserted into a mounting hole formed at the base of the sickle, and a plurality of mounting shafts that can be engaged with the small protrusions so as to be scattered on an arc centered on the mounting shaft. This sickle is characterized in that a small recess is formed therein, and the attachment angle of the sickle blade to the sickle handle can be changed by selecting the small recess to be engaged with the small protrusion.

Furthermore, in the sickle, the base of the sickle blade is formed in a substantially arc shape in a plan view.

Function> The base of the sickle is rotatable about the mounting shaft around the mounting hole. By setting the sickle blade at a desired angle and engaging the corresponding small protrusions and small recesses in that state, the sickle blade is reliably fixed at that angle.

<Embodiments> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing the external shape of a replaceable blade type sickle 11 according to an embodiment of the present invention, and FIG.
FIG. FIG. 2 is partially cut away or transparent to show the internal structure.

To explain with reference to FIG. 1 and FIG. 2, a replaceable blade type sickle 1
1 is a sickle handle 12 and a sickle body 1 attached to the tip thereof;
It has 3. The sickle handle 12 consists of a grip part 14 and a bent part 15 extending from the tip of the grip part 14, and the bent part 15 is formed at an angle α (in this embodiment, α) with respect to the length direction of the grip part 14. -10 degrees) is bent. A holding structure, which will be described later, is provided on this bent portion 15, and the sickle 13 is held by the holding structure.

The user holds the sickle 11 by gripping any part of the grip part 14.
use. At that time, the bent part with respect to the grip part 14]
-5 is bent at an angle α, and the sickle 13 is attached to the bent portion 15, so the sickle 13 is inclined at an angle α with respect to the grip portion 14. As a result, the replaceable blade type sickle 11 is extremely easy to use.

As shown in the cutaway cross section of FIG. 2, the grip portion 14 has a structure in which, for example, a core 16 die-cast from aluminum is covered with a cylindrical body 17 made of synthetic rubber. . As a result, the grip portion 14 has a durable structure and a surface that is difficult to slip and is easy to hold.

When die-casting the core 16, it may be formed into a rod shape, a partially hollowed-out ladder shape, or a long plate shape with convex ribs. No matter what shape you choose for the core 16, since the core 16 is precisely formed by metal die-casting, the inclination angle α of the bent part 15 with respect to the grip part 14 can be made without variation from product to product. You can align it to the desired angle. Furthermore, the grip portion 14 can be made much better in terms of both durability and weather resistance than wood or the like.

FIG. 3 shows a bent portion 15 drawn to explain the holding structure.
In the enlarged cross-sectional view, functions of parts necessary for explanation of the holding structure are indicated by dashed lines.

To explain with reference to FIGS. 2 and 3, the bent portion 15
The structure includes a base part 18, a clamping member 19 attached to the back side of the base part 18, and a fixing screw 20 fitted from the front side of the base part 18.

The base portion 18 is formed by die-casting to form the grip portion 14.
It is formed integrally with the core 16 of. An engagement surface 21 for attaching the sickle 13 to the tip of the back side of the base 18
is formed. The engagement surface 21 is stepped with respect to other parts, and this step makes it easy to determine the mounting position of the sickle blade 13.

Furthermore, an angle determining protrusion 22 is provided on the engagement surface 21 in a protruding manner. As will be described in detail later, the angle determining protrusion 22 engages with one of the plurality of recessed notches 35a, 35b, or 35c (see FIG. 4) formed in the sickle 13, and
This is to specify the mounting angle of the

Furthermore, a first hole 23 is formed in the base portion 18 so as to pass through approximately the center of the engagement surface 21 from the front surface to the back surface of the base portion 18 .

The holding member 19 is a longitudinal member extending along the back side of the base portion 18, and its base portion 27 is firmly fixed to the base portion 18 with, for example, two screws 28. In this embodiment, one clamping member is made of synthetic resin 19b into which a leaf spring 19a is insert-molded. In its natural state, the clamping member 19 is brought into slight pressure contact with the base portion 18 due to the elasticity of a built-in leaf spring 19a.

Therefore, the sickle 13 attached to the engagement surface 21 is held between the base portion 18 and the holding member 19 in its natural state.
It will not come off the engagement surface 21 inadvertently.

Further, a screw frame 29 is fixed to the tip of the clamping member 19 at a position facing the first hole 23 formed in the base portion 18 . This screw frame 29 has a female thread 26 formed therein. The screw frame 29 has a mounting hole 2 formed in the sickle body 13.
5 (see FIG. 4), and its main part is inserted into a first hole 23 formed in the base part 18. In this state, the fixing screw 20 can be screwed into the screw frame 29. That is, when the screw shaft 24 of the fixing screw 20 is screwed into the female thread 26 of the screw frame 29, the sickle blade 13 is firmly tightened and held by the base portion 18 and the clamping member 19, and the sickle blade 13 is separated. It doesn't sag or wobble.

The clamping member 19 is further provided with a pressing protrusion 30. The pressing protrusion 30 is provided to protrude from approximately the central portion of the holding member 19 in the length direction. A second hole 31 through which the pressing protrusion 30 passes is formed in the base portion 18 . In the natural state, the tip of the pressing protrusion 30 passes through the second hole 31,
It protrudes from the surface of the platform 18. User is Kamami 13
When replacing the base part 18, the fixing screw 20 is removed and the suppressing protrusion 30 protruding from the surface of the base part 18 is pressed. As a result, the clamping member 19 curves downward as shown by the solid line, and the distance between the engaging surface 21 and the clamping member 19 widens to a distance sufficient to remove the sickle blade 13.

In addition, in the above-mentioned embodiment, the clamping member 19 is a leaf spring 19a.
9b, but it may also be constructed using only a leaf spring.

Furthermore, in the above-described embodiment, the pressing protrusion 30 is provided so that the clamping member 19 can be easily bent downward when the sickle blade 13 is replaced, but the pressing protrusion 30 is not always necessary, and the structure may be modified. For simplicity, it may be omitted. Moreover, instead of the suppressing protrusion 30, a protrusion is provided on the tip of the clamping member 19, on which the user can hang his or her fingers, and the sickle body 1 is
The holding member 19 may be easily bent downward when replacing the holding member 3.

FIG. 4 is a plan view of the sickle body 13. As shown in FIG. 4, the sickle 13 according to this embodiment is not provided with a core at the base like the conventional sickle, but the base 32 of the sickle 13 is directly attached to the sickle handle 12. It has a shape that can be attached to the engagement surface 21 (see FIG. 3). More specifically, Kamami 1
3 does not have a bent portion, and is formed by punching out a flat steel plate, for example, and has a blade 33 attached thereto. Therefore, this sickle body 13 is easily adapted to machining during manufacturing, and can be mass-produced at low cost.

Moreover, even if the base of the sickle 13 is not bent like a conventional sickle, the sickle handle 12 itself is bent as described above, so when the sickle is attached to the sickle handle 12, the sickle 13
is tilted to the most convenient angle.

The root 32 of the sickle 13 has a substantially arcuate edge in its planar shape, and a mounting hole 34 is formed in the center thereof. Moreover, three recessed notches 35a, 35b, and 35C for angle determination are formed on the edge of the base 32.

In this embodiment, the base 32 of the sickle body 13 is attached directly to the sickle handle 12, and although it is not configured to have a core for attachment, it is possible to attach a core to the sickle body 13. The core may be provided so that the core can be attached to the sickle handle 12. Even in such a case, there is no need to bend the core, and the kamami 1
3 can be constructed by simply punching out a flat plate and attaching a blade.

Further, the edge of the root 32 of the sickle 13 may not be substantially arc-shaped, but may have an angular shape such as a rectangle or a polygon.

In such a case, the attachment angle of the sickle 13 may be determined by how the stepped portion of the engagement surface 21 and the corner of the edge of the base 32 are engaged.

FIG. 5 is a partial rear view of the replaceable blade type sickle 11 according to this embodiment. As shown in FIG. 5, the engagement surface 21 of the bent portion 15
The root 32 of the sickle 13 is attached to the angle determining protrusion 22 protruding from the
The attachment angle of the sickle blade 13 to the sickle handle 12 can be changed by selecting which of the recessed notches 35a, 35b, and 35c formed on the edge of the sickle handle 12 is to be engaged. Normally, the recessed notch 35a is engaged with the angle determining protrusion 22, but
Depending on the usage condition, the recessed notch 35b may be replaced by the angular protrusion 22.
It may be engaged with. In addition, when the recessed notch 35c is engaged with the angle determining protrusion 22, the sickle body 13 extends substantially in a straight line with the length direction of the sickle handle 12, which allows cutting of weeds, tree branches, etc. suitable for payment.

Even if the angle at which the sickle blade 13 is attached to the sickle handle 12 is changed,
Since the base 32 of the sickle 13 is firmly held by the sickle handle 12, there is no fear that the attachment angle of the sickle 13 will shift or that the sickle 13 will wobble.

In addition, the sickle 13 can be replaced when its sharpness deteriorates, so by replacing the sickle 13, the sharpness can always be maintained at a good level. In addition, since the sickle 13 can be sharpened while being removed from the sickle handle 12, when the sharpness of the sickle 13 deteriorates, the case where the sickle 13 is removed from the sickle handle 12 and the blade 32 is sharpened. It also has the advantage of being easy to sharpen.

In addition, sickles are divided into types depending on the thickness of the sickle (blade): thin sickle, medium thick sickle, and wooden sickle, but according to this invention, it can be used as many types of sickle by simply changing the sickle body. can.

In the above embodiment, three recessed notches 35 a, 35 b, and 35 C were formed on the edge of the base 32 of the sickle 13, but any number of these recessed notches may be formed.

Further, instead of the recessed notch, small holes may be formed scattered on an arc centered on the attachment hole 34.

Furthermore, a plurality of protrusions 36a are formed at equal intervals on the root 32, as shown in FIG.
, 36b, 36c may be provided, and a plurality of recesses 37a, 37b, 37C may be formed in the base 18 of the sickle handle 12, in which the protrusions provided at the base 32 of the sickle blade 13 described above can engage.

<Effects of the Invention> Since the present invention is configured as described above, the sickle blade can be easily replaced, and the angle of the sickle blade with respect to the sickle handle can be freely changed depending on the application, making it versatile. We can provide sickles that can be used for

Further, according to the embodiment of the present invention, since the sickle handle is constructed using a metal material, it can be made durable and has a structure with few structural defects, and can be used for a long period of time while replacing the sickle barrel.

In addition, the sickle blade used as a spare blade does not need to have a bent part, so it can be manufactured by simply punching out a flat plate and attaching a blade, making it easy to adapt to machining, inexpensive, and suitable for mass production. Therefore, in the long run, the result is a high-quality product that is inexpensive for the user.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the external shape of a replaceable blade type sickle according to an embodiment of the present invention. FIG. 2 is a front view of a replaceable blade type sickle according to an embodiment of the present invention. FIG. 3 is an enlarged partial front view of a replaceable blade type sickle according to an embodiment of the present invention. FIG. 4 is a plan view of a sickle barrel attached to a replaceable blade type sickle according to an embodiment of the present invention. FIG. 5 is a partial rear view of a replaceable blade type sickle according to an embodiment of the present invention. FIG. 6 is a diagram showing another example of the configuration for determining the angle between the base and the sickle body. 7A and 7B are a front view and a side view of a conventional common sickle. In the figure, 11... Replaceable blade type sickle, 12... Sickle handle, 1
3... Sickle body, 14... Grip part, 15... Bent part, 16... Core part, 17... Cylindrical body, 18... Base part, 19... Clamping member, 20...・Fixing screw, 21...
Engaging surface, 22... angle determining protrusion, 30... pressing protrusion, are shown.

Claims (4)

[Claims] (1) A sickle whose entire body is flat, and a sickle handle whose distal end is bent at a predetermined angle with respect to the length direction of the handle, and whose distal end is provided with a holding structure that can detachably hold the sickle. The sickle has a mounting hole formed at the base of the sickle body, and a plurality of small recesses are formed so as to be scattered on an arc centered on the mounting hole, and the holding structure has a mounting hole formed at the base of the sickle body. is provided with a mounting shaft that is inserted into a mounting hole formed at the base of the sickle, and at least one small protrusion that can be engaged with the plurality of small recesses; A sickle characterized in that the angle at which the sickle is attached to the sickle handle can be changed by selecting a small recess to be fitted. (2) In the sickle according to claim 1, the base of the sickle body is formed in a substantially arc shape in a plan view, and the plurality of small recesses are formed along the edge of the base. It is characterized by including a plurality of recessed portions. (3) A sickle whose entirety is flat, and a sickle handle whose tip is bent at a predetermined angle with respect to the length of the handle, and whose tip is provided with a holding structure that can detachably hold the sickle. A sickle provided with the sickle, wherein a mounting hole is formed at the base of the sickle body, and at least one small protrusion is provided at a position separated from the mounting hole by a predetermined distance, and the holding structure has a mounting hole formed at the base of the sickle body. A mounting shaft is provided to be inserted into a mounting hole formed at the base of the body, and a plurality of small recesses that can be engaged with the small protrusions are scattered on an arc centered on the mounting shaft. A sickle, characterized in that the angle at which the sickle is attached to the sickle handle can be changed by selecting a small recess to be engaged with the small protrusion. (4) The sickle according to claim 3, wherein the base of the sickle body is formed in a substantially arc shape in a plan view.