JP2002017101A - Attaching structure for spare blade for weed scraping implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching structure for a spare blade capable of freely detaching the spare blade 4 on a handle or on a body 1 of a weed scraping tool fixed on the handle and securely stabilizing mounted spare blade 4. SOLUTION: This structure comprises a body 2 having a groove 3 of a constant depth formed from the end part and a spare blade 4 having a thickness capable of inserting into the groove 3. A holding member 5 is protruded on an end and a pulling engaging equipment 6 is installed on the other end of the inside of the groove 3 of the body 2. On the other hand, notched parts 9, 10 are installed on both left and right edges of the spare blade, a pulling lever 7 of the pulling engaging equipment 6 is engaged with the notch 10 of the spare blade 4 in a state engaging the notched part 9 with the holding member 5 and then an operating lever is fallen down to press and fix the spare blade 4 to the holding member 5 by the pulling lever 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for using a flat blade, such as a weeder, a scraper for removing paint, a scraper for removing rust, and the like, which uses a method for removing weeds from the roots. The present invention relates to a replacement blade mounting structure of a replacement blade type.

[0002]

2. Description of the Related Art A conventional weeder or scraper for weeding is usually one in which an integrated body having a blade having a fixed shape is simply fixed to the tip of a handle. As a replacement blade type,
Some have proposed replacement blades that can be attached to and detached from the main body with screws or the like.

[0003]

In the conventional one in which the main body of the integral type is fixed to the tip of the handle, if the blade portion is worn out, the entire body including the handle must be discarded, which is extremely uneconomical. there were. In particular, the blade always contacts the surface of the soil,
With this kind of product that comes in contact with the work surface, the blade part is severely worn,
It will wear out in a short time. If the blade portion is formed thick so as to withstand wear as much as possible, there is a problem in workability, and if the blade portion is formed sharp, the durability is inferior.
On the other hand, the conventional screw-fixing type replacement blade requires a lot of trouble to attach and detach, and there is a disadvantage that if the screw is rusted, it cannot be easily attached or detached.

In view of the above-mentioned drawbacks of the prior art, the present invention provides a replacement blade mounting structure such as a mower which can be easily attached and detached and can be mounted stably and stably on a handle. It is intended to do so.

[0005]

In order to achieve the above object, the present invention comprises a main body 2 mounted on the tip of a handle 1 and a replacement blade 4. The main body 2 having a constant width has a fixed width from the tip. While the groove 3 having a depth is formed, the replacement blade 4 has a thickness that can be inserted into the groove 3, and cutouts 9 and 10 are formed in left and right side edge portions. On the other hand, a locking portion is formed in a groove at one end in the width direction of the main body 2, specifically, as an example, a locking member 5 is protruded, and a pulling locking tool is pulled at the other end of the main body 2 in the width direction. The guide hole 8 for guiding the distal end of the pulling rod 7 of the tension locking device 6 is drilled inward from the side edge of the main body 2.

In this state, the notch 9 formed at one end of the replacement blade 4 is engaged with a locking portion formed in the groove 3 of the main body, specifically, the locking member 5, and the other portion of the replacement blade 4 is The notch 10 formed at the end is engaged with the pulling rod 7 of the tension locking device 6, and the replacement blade 4 is pressed by the tension locking device 6 against the locking portion formed in the groove 3 of the main body 2. I do. Thus, the replacement blade can be stably held at all times, and the replacement blade 4 can be easily removed by releasing the pull of the tension locking device 6.

The replacement blade 4 to be mounted in the groove 3 of the main body 2 has working edges 11 formed on both upper and lower side edges, and cutouts which are respectively engaged with the locking member 5 in two upper and lower stages on both left and right sides. If the notches 10, 10 with which the portions 9, 9 and the tip of the pulling rod 7 are engaged are formed, the replacement blade 4 can be inverted and used. When the guide hole 8 formed in the main body 2 is formed deeper than the notch 10 formed in the replacement blade 4, the pulling rod of the tension locking device always engages with the notch of the replacement blade. Thus, the replacement blade 4 can be firmly held. Further, the working width can be freely changed by swinging the main body 2 at a predetermined angle with respect to the handle 1 or the mounting rod 12 fixed to the handle and fixing the body at a predetermined swing angle.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a weeder for weeding will be described below with reference to the accompanying drawings. FIG. 1 is a side view of the entire weeding mower for implementing the present invention. FIG. 2 is a front view of the main body. FIG. 3 is a front view of the main body with a part cut away.

A replaceable blade-type grass cutter according to the present invention comprises a handle 1
Is a weeding tool of a system in which a main body 2 is mounted on the tip of the body, a replacement blade 4 is mounted on the main body 2, and an operator operates the handle 1 to pull the weeds away from the roots. The main unit 2 is convenient for removing weeds from the roots.
Is formed so as to be bent at an acute angle when viewed from the side, so that the replacement blade 4 faces the direction of the handle 1.

As shown in FIGS. 2 and 3, the main body 2 has a front end (lower end) formed to have a constant width, and as can be understood from FIGS. Has formed. As shown in FIG. 9, the groove 3 has a width w that allows the replacement blade 4 having a thickness t to be freely inserted without large play. At one end (left side in FIG. 3) in the groove 3, a locking member 5 is provided as a locking portion by fixing a pin, for example. The locking member 5, which is a locking portion, is not limited as long as it can support a notch 9 of a replacement blade described later, for example, by projecting a part of the main body 2 into the groove 3. You may.

At the other end of the main body 2 (the left side in FIG. 3), a well-known pulling and locking member 6 is provided at a shoulder formed in a mountain shape, and a tip of a pulling rod 7 of the pulling and locking member 6 is provided below the pulling and locking member 6. A guide hole 8 through which the portion is guided is formed inward from the side edge. In other words, when the operation lever 6a of the pulling lock 6 is depressed, the tip of the pulling rod 7 moves inward along the guide hole 8.

The replacement blade 4 mounted on the groove 3 of the main body 2 is shown in FIG.
As shown in FIG. 3, edges 11 and 11 are formed on both upper and lower edges, and a notch 9 engaging with the locking member 5 is formed on one of the left and right edges (the left edge in FIG. 3) and the other of the left and right edges (FIG. 3). A notch 10 is formed on the right edge of the pulling engagement member 6 to be engaged with the pulling rod 7 of the pulling locking device 6. The notches 9 and 10 are arranged at symmetrical positions on both left and right side edges.

In order to mount the replacement blade 4 in the groove 3 of the main body 2, the notch 9 formed on one side edge of the replacement blade 4 is engaged with the locking member 5 in the groove 3. Push it into 3
It is assumed that the notch 10 is aligned with the position of the guide groove 8 of the main body 2. In this state, the pulling rod 7 of the pulling locking tool 6 that has raised the operating lever 6a is engaged with the notch 10 of the replacement blade 4, and the operating lever 6a is depressed. When you depress the operation lever 6a,
While the pulling rod 7 is guided by the guide groove 8 of the main body 2, the replacement blade 4 is pressed in the direction of the locking member 5, and is firmly fixed. At this time, the replacement blade 4 is firmly held by the spring elastic force of the pulling rod 7.

The notches 9 and 10 formed in the replacement blade 4 may be provided at one position on each of the left and right side edges, but in the illustrated embodiment, two notches are provided at vertically symmetric positions. By doing so, the replacement blade can be inverted and mounted, and the upper and lower side edges of the replacement blade can be effectively used as working edges 11. The shapes of the cutouts 9 and 10 may be different, but if the cutouts 9 and 10 are set to have the same shape, the cutouts 9 and 10 can be mounted even if the replacement blade is turned upside down. Further, the notches 9 and 10 are respectively arranged at two vertically symmetrical positions, but may be formed at asymmetrical positions having different distances from the edge 11. In this case, by mounting the replacement blade 4 upside down, the replacement blade can be used in a state where the protrusion amount of the replacement blade from the main body 2 is different.

The length X of the guide hole 8 formed in the main body 2 is
The length Y of the notch 10 formed in the replacement blade 4 may be the same, but it is preferable that the length X of the guide hole 8 be long as shown in FIG. In this way, as shown in FIG. 4B, the pulling rod 7 of the pulling locking tool 6 always pulls the notch 10 of the replacement blade 4, and the replacement blade 4
Is pressed against the locking member 5, so that it can be mounted and maintained in a more stable state.

In order to form the groove 3 at the tip of the main body 2, the main body 2 is formed from a thick plate material, and the groove 3 is cut.
A separate member may be mounted so as to maintain a constant interval only at the portion where the is formed. However, as a more rational method, as shown in FIG. 9, two relatively thin plate members 2A and 2B are overlapped to form the main body 2, and one plate member 2b is formed.
If the groove is formed by bending the front end of the groove, the processing can be performed relatively easily.
In addition, the main body can be easily formed from a stainless steel plate that is relatively difficult to process.

If the main body 2 is swung with respect to the handle 1 and can be fixed at a desired swing position, the main body 2 can be used with the working width substantially changed, and is narrow. It is convenient for cutting grass in complicated land. In order to swing the main body 2 with respect to the handle 1, the main body 2 is pivotally mounted on the tip of the handle 1 or a mounting rod 12 fixed to the handle 1 as shown in FIG. So that it can be fixed to

As described above, the screw hole 13 is formed in the base 2a of the main body in order to swing the main body 2 freely. In the illustrated example, a nut 13a is fixed to the rear surface of the through hole to form a screw hole, and the base 2a of the main body 2 and the mounting rod 12 are fixed to the screw hole 13 using fixing bolts 14. In addition,
Simply fixing the main body 2 and the mounting rod 12 using the fixing bolts 14 may cause the main body 2 to be unstable during operation.

Therefore, in the illustrated embodiment, the base 2a of the main body 2 is provided.
At the same time, locking holes 15 and 15 are formed at a certain angle α on an arc locus centered on the screw hole 13, and an engaging pin 17 is projected from the mounting rod 12 in front of the mounting hole 16. The engaging pin 17 is prevented from rotating freely by engaging with the locking hole 15. In this manner, the main body 2 is attached to the mounting rod 12 by loosening the tightening of the fixing bolt and tightening the fixing bolt 14 in a state where the engaging pin 17 is engaged with the locking hole 15 corresponding to the position of the desired angle. Can be fixed firmly.

FIG. 5 is a plan view in which the main body 2 is fixed in a state of being used at the maximum width W. In this state, when the tightening of the fixing bolt 14 is loosened and the main body 2 and the mounting rod 12 are relatively rotated to tighten the fixing bolt 14, the main body 2 is fixed to be used with a narrow width W 'as shown in FIG. It is fixed in a state where it is rotated by an angle. In any of the states shown in FIGS. 5 and 6, the main body 2 and the mounting rod 12 are fastened by the fixing bolts 14 in a state where they are engaged with the engaging pins 17 and do not rotate in a plane. Therefore, even if a large turning force acts on the main body 2 due to the weeding operation, the main body 2 can be used without rattling or free rotation.

The state in which the present invention has been applied to a weeder for weeding has been described above. However, the present invention is applicable not only to a weeder but also to a method using a flat blade, for example, for painting. The present invention can also be applied to a scraper used for removing old paint. FIG. 10 is an overall side view showing an example of a scraper that performs a scraper operation on a wide surface while holding the handle 1 with both hands. In this case, the mounting structure of the replacement blade 4 mounted on the tip of the main body 2 is the same as that of the grass cutter described above, except that the tip of the main body 1 faces forward of the handle 1. .

The scraper shown in FIG. 11 shows an embodiment of a scraper which can be operated with one hand. For example, in addition to a scraper for removing paint and removing rust, a scraper for interior work and surface mounting work, etc. It can be applied to

[0023]

According to the replacement blade mounting structure of the present invention, the replacement blade can be easily replaced with one touch, and the mounted replacement blade is firmly fixed to the main body. Can be done.

According to the second aspect of the present invention, by inverting the replacement blade, it is possible to mount the replacement blade to use the edges formed on the upper and lower side edges.
Therefore, one replacement blade can be used twice as a blade with a new edge.

According to the third aspect of the present invention, the mounted replacement blade itself is always mounted in a state where it is pressed against the locking member by the pulling rod of the pulling locking tool, and is easy to use without rattling during use. Can be good.

According to the fourth aspect of the present invention, the working width can be freely changed and used according to the situation of the work place.

According to the fifth aspect of the present invention, in carrying out the fourth aspect of the present invention, the main body can be firmly fixed to the handle without rattling.

[Brief description of the drawings]

FIG. 1 is a side view of an entire mower that applies the present invention to a mower.

FIG. 2 is a front view of only a main body,

FIG. 3 is a front view showing a state in which a main body and a replacement blade are separated from each other and partially cut away;

FIG. 4 is a front view showing the relationship between the guide hole of the main body and the notch of the replacement blade;

FIG. 5 is a plan view of a body and a mounting rod of the mower according to the present invention;

FIG. 6 is a plan view of the main body and the mounting rod in a state where the main body is swung.

FIG. 7 is a plan view of a base of the main body fixed to the mounting rod.

FIG. 8 is a sectional view taken along line AA of FIG. 5;

FIG. 9 is a sectional view taken along line BB of FIG. 3;

FIG. 10 is a side view of a state where the present invention is applied to a scraper such as paint peeling,

FIG. 11 is a front view of a state in which the present invention is applied to a single-handed scraper.

[Explanation of symbols]

1 ... handle, 2 ... scraper body, 2a ... base, 3 ...
Grooves, 4 replacement blades, 5 locking members, 6 pulling locks, 6a operating levers, 7 pulling rods, 8 guide holes, 9 cutouts, 10 cutouts, 11 cutting edges,
12 ... Mounting rod, 13 ... Screw hole, 13a ... Nut, 14 ...
Fixing bolts, 15: locking holes, 16: mounting holes, 17: engaging pins.

Claims (5)

[Claims] 1. A main body in which a groove having a predetermined depth from a tip is formed, and a replaceable blade having a thickness capable of being inserted into the groove formed in the main body and having cutouts formed in left and right side edges. And a locking portion is formed in a groove at one end in the width direction of the main body, and a tension locking device is arranged at the other end in the width direction of the main body. A guide hole for guiding the tip is bored inward from the side edge of the main body, and a notch formed at one end of the replacement blade is engaged with a locking portion formed in a groove of the main body, The notch formed at the other end of the replacement blade is engaged with the pulling rod of the pull-locking device, and the replacement blade is pressed against the locking portion formed in the groove of the main body by the pull-locking device. Replacement blade mounting structure for grass cutters. 2. The replacement blade mounted in the groove of the main body has a working edge formed on both upper and lower side edges, and a notch formed in two upper and lower stages on both left and right sides. Replacement blade mounting structure for grass cutters. 3. The guide hole formed in the main body is formed deeper than the notch formed in the spare blade and inward from the side edge of the main body, and the tip end of the pulling rod of the tension locking member is always formed. The replacement blade mounting structure according to claim 1 or 2, wherein the replacement blade is engaged with the notch portion of the replacement blade and presses the replacement blade toward the locking portion. 4. The mower according to claim 1, wherein the main body swings at a predetermined angle with respect to the handle or a mounting rod fixed to the handle, and fixes at a predetermined swing angle. Replacement blade mounting structure. 5. A main body is pivotally mounted on a handle or a mounting rod fixed to the handle in a state capable of being tightened, and is fixed to one of the main body and the handle or the mounting rod fixed to the handle from a center of the shaft mounting. Lock holes at multiple positions on the rotation path of the dimensions,
The replacement blade mounting structure of a grass cutter or the like according to claim 4, wherein an engagement pin (17) engaging with the locking hole is protruded from one of the other.