JP6963655B2 - Wood chopping device - Google Patents

Description

The present invention relates to a wood-splitting device, and more particularly to a wood-splitting device that can safely and efficiently split firewood and is easy to maintain.

For example, when chopping firewood in outdoor activities such as camping, it is often the case that the blade of a hatchet is applied to the upper end of the firewood. In chopping wood using the hatchet, it is necessary to hold a heavy and dangerous hatchet with one hand, place the blade of the hatchet on the upper end of the firewood, and repeat the manual work of raising and lowering the hatchet, resulting in poor work efficiency. In addition, there is a risk that the worker's hand may touch the blade of the hatchet and get injured when chopping wood, which is dangerous.

Therefore, the wood splitter disclosed in Patent Document 1 is provided as a means for manually chopping wood safely and efficiently. In the firewood splitter, instead of hitting the upper end of the firewood with a hatchet blade, the lower end of the firewood is placed on the cutting edge of the standing blade installed at the place where the firewood splitting work is performed, and the upper end of the firewood is pressed downward with a hammer. By doing so, the cutting edge was cut into the lower part of the firewood, and the firewood was chopped by pressing with a hammer. The wood splitter is composed of a long blade to be erected and two or more inclined blades which are connected to one end of the long blade and are erected at a predetermined angle, and the long blade has a predetermined length from the outside. It had a special type of blade in which a horizontal cutting edge was provided and an inclined cutting edge was provided so as to be lowered toward the center from the horizontal cutting edge, and the cutting edge of the inclined blade was arranged so as to be lowered toward the center.

Therefore, when using a wood splitter with such a special configuration, there is a problem that it is not easy to maintain the wood splitter such as sharpening the cutting edge, and it is necessary to carefully transport it because the dangerous blade is exposed. there were. Further, since the blade has such a special shape, the manufacturing cost of the wood splitter is high and the product price is high, so that it is not easily available to anyone in outdoor activities such as camping.

Japanese Unexamined Patent Publication No. 2004-305256

The present invention has been developed in view of such conventional problems, and not only can firewood be broken safely and efficiently, but it can also be easily maintained, safely transported, and manufactured at a manufacturing cost. The object is to provide a wood-splitting device that can reduce the amount of firewood.

In order to solve the above problems, the present invention employs the following means.
That is, the first aspect of the wood-splitting device according to the present invention is a wood-splitting device including a support base having a pair of left and right facing support members and a hatchet detachably attached to the support base. Left and right insertion openings through which the blade of the hatchet can be inserted into the pair of strut members from the tip in the length direction with the blade provided on one side of the blade facing upward. Is provided. Then, a portion of the blade on the tip end side and a portion on the base end side of the blade are inserted into the left and right insertion openings, and the blade is bridged between the left and right strut members. With the other side edge of the blade supported by the bottoms of the left and right insertion openings, the lower end of the wood is applied to the upper end (blade edge) of the blade facing upward, and the upper end of the wood is downward. By striking, the firewood can be split by the blade. Further, the hatchet can be removed from the support base by pulling out the blade body from the left and right insertion openings.

A second aspect of the wood-splitting device according to the present invention is that, in the first aspect, the pair of strut members are made of wood, and the other side edge of the blade is attached to the bottom of the left and right insertion openings. It is characterized in that a metal receiving piece that is supported from below is provided.

In the third aspect of the wood-splitting device according to the present invention, in the second aspect, the receiving piece is a bolt shaft penetrating the support column member, and the upper end portion of the bolt shaft in the penetrating state is the insertion opening. It is characterized by being present at the bottom of the part.

A fourth aspect of the wood-splitting device according to the present invention is, in any one of the first to third aspects, the base end portion of the blade body is inserted in a state where the blade body is inserted into the left and right insertion openings. The blade is characterized in that the upper end (blade edge) of the blade is tilted at a required angle with respect to the horizontal plane by being positioned higher than the tip of the blade.

A fifth aspect of the wood-splitting device according to the present invention is characterized in that, in the fourth aspect, the inclination angle of the blade portion can be adjusted.

In the sixth aspect of the wood-splitting device according to the present invention, in the first to fifth aspects, a pair of lower parts of the support members are connected by a connecting member, and the upper end portion of the connecting member is the said. The front and rear portions of the upper end portion are formed as a mountain-shaped inclined surface that inclines downward in the opposite direction, and the top portion of the mountain-shaped inclined surface is located substantially directly below the blade portion.

A seventh aspect of the wood-splitting device according to the present invention is characterized in that, in the sixth aspect, the mountain-shaped inclined surface is covered with a mountain-shaped metal cover piece that abuts on the mountain-shaped inclined surface. Is to be.

The support base according to the present invention is a support base that constitutes the wood-splitting device according to the first to seventh aspects.

According to the present invention, it is possible to provide a firewood splitting device that can not only split firewood safely and efficiently, but also can be easily maintained, safely transported, and can reduce the manufacturing cost.

It is a partial cross-sectional front view which shows the wood-splitting device which concerns on this invention by disassembling into a support stand and a hatchet. It is a perspective view which shows the wood-splitting device which concerns on this invention. It is explanatory drawing explaining the use state of the wood chopping apparatus which concerns on this invention. It is sectional drawing which shows the state which provided the receiving piece as a bolt shaft at the bottom of the insertion opening. It is explanatory drawing explaining the action of the mountain-shaped inclined surface which constitutes the upper end part of the connecting member which connects the lower part of a pair of support members with each other. It is a front view which shows the wood-splitting device which makes the upper end of a blade part inclined with respect to a horizontal plane. It is explanatory drawing which shows an example of the use mode of the wood-splitting device which concerns on this invention. It is explanatory drawing which shows the other example of the use mode of the wood-splitting device which concerns on this invention.

The wood-splitting device 1 according to the present invention in FIGS. There is. The pair of left and right strut members 2 and 3 have a blade 7 of the hatchet 6 and a tip portion 11 in the length direction thereof with the blade portion 10 provided on one side portion 9 of the blade 7 facing upward. Left and right insertion openings 12, 13 that can be inserted from are provided.

Then, as shown in FIGS. 2 to 3, the portion 15 on the tip end portion 11 side of the blade body 7 and the portion 16 on the base end portion side of the blade body 7 are inserted into the left and right insertion openings 12 and 13. The blade body 7 is bridged between the left and right strut members 2 and 3, and in this state, the other side edges 17 of the blade body 7 are supported by the bottoms 19 and 20 of the left and right insertion openings 12 and 13. NS. In the hatchet mounting state 21 (FIGS. 2 to 3), the lower end 25 of the firewood 23 is applied to the upper end 22 (blade edge) 8 of the blade portion 10 facing upward, and the upper end 26 of the firewood 23 is pressed downward with a hammer. Therefore, the firewood 23 can be divided by the blade 7. After the wood-splitting work is completed, the hatchet 6 can be removed from the support base 5 by pulling out the blade 7 from the left and right insertion openings 12 and 13. The insertion direction and the pull-out direction of the hatchet 6 at the time of mounting and removing the hatchet 6 are shown by arrows F1 and F2 in FIG.

This will be described in more detail below. In this embodiment, the support base 5 is entirely made of wood, and a pair of strut members 2 and 3 facing each other on the left and right are erected on the pedestal 27, and a connecting member 29 is provided between the lower portions of the pair of strut members 2 and 3. It is connected. As shown in FIGS. 2 and 5, the upper end portion 30 of the connecting member 29 exhibits a mountain-shaped inclined surface 33 in which the front and rear portions 31 and 32 of the upper end portion 30 are inclined downward in the opposite direction. The top portion 35 of the mountain-shaped inclined surface 33 is located substantially directly below the blade portion 19.

Then, on the pair of left and right strut members 2 and 3, the blade 7 of the hatchet 6 is directed upward in the length direction of the blade 10 provided on the one side portion 9 of the blade 7. Left and right insertion openings 12 and 13 that can be inserted from the tip 11 (FIGS. 1 and 2) of the above are provided. In FIGS. It shows a state of being bridged between the support members 2 and 3 of the above. In this embodiment, the left and right insertion openings 12 and 13 are provided so as to substantially match the cross-sectional shape of the blade 7. Therefore, the blade body 7 is held by the pair of support column members 2 and 3 in a stable bridging state, and the upper end 22 of the blade portion 10 is in a horizontal state. In the bridged state, the other side edge 17 of the blade 7 is supported by the bottoms 19, 20 of the insertion openings 12, 13, as described above.

In this embodiment, since the pair of strut members 2 and 3 are made of wood, the bottom portion 19, 20 may be deformed. Therefore, in this embodiment, the bottoms 19 and 20 of the insertion openings 12 and 13 are provided with metal receiving pieces 37 and 37 that support the other side edge 17 of the blade 7 from below. The receiving pieces 37, 37 can be configured by, for example, a bolt shaft 39 penetrating the support column members 2, 3. Therefore, as shown in FIGS. 1 and 4, the lower portion 40 of the insertion openings 12 and 13 penetrates the support column members 2 and 3 in the width direction (front-back direction) of the insertion openings 12 and 13. Through holes 41, 41 are provided, and the bolt shafts 39, 39 are inserted through the through holes 41, 41.

As shown in FIG. 4, the bolt heads 42, 42 provided at one end of the bolt shafts 39, 39 inserted through the through holes 41, 41 are the edges of one end of the through holes 41, 41. As shown in FIG. 4, nuts 46, 46 are screwed to the other end portions 45, 45 of the bolt shafts 39, 39 via the washer 44, and the nuts 46, 46 are screwed to the other end portions 45, 45 of the bolt shafts 39, 39. The bolt shafts 39 and 39 are fixed to the column members 2 and 3 by means of the bolt shafts 39 and 39. The upper ends 47, 47 of the bolt shafts 39, 39, respectively, are located at the bottoms 19, 20 of the insertion openings 12, 13.

A hatchet-mounted state 21 in which the blade 7 is bridged between the left and right strut members 2, 3 and the other side edge 17 of the blade 7 is supported by the bottoms 19, 20 of the insertion openings 12, 13. Then, as shown in FIG. 3, when the lower end 25 of the firewood 23 is applied to the upper end 22 of the blade portion 10 facing upward and the upper end 26 of the firewood 23 is pressed downward with a hammer, the firewood 23 is pressed against the blade body. It can be divided by 7. Since the impact at the time of pressing can be supported by the bolt 39 (the receiving piece 37), the bottoms 19 and 20 of the insertion openings 12 and 13 provided in the wooden strut members 2 and 3 are provided. It will be possible to protect.

In this embodiment, as described above, in order to reinforce the lower parts 49, 49 of the left and right support members 2, 3 which are made of wood, the connecting members 29 are connected between the lower parts 49, 49 of the support members 2, 3. It is connected. The connecting member 29 is made of wood, and the upper end portion 30 thereof exhibits a mountain-shaped inclined surface 33 as described above (FIGS. 2 and 5). The mountain-shaped inclined surface 33 is formed as an isosceles triangular inclined surface in this embodiment, and its apex angle is set to, for example, 60 degrees.

When the length of the firewood 23 is long, the upper end portion 30 of the connecting member 29 is configured as the mountain-shaped inclined surface 33 on the lower end side of the firewood 23 as shown in FIG. 5 (A). This is to allow the mountain-shaped inclined surface 33 to enter the portion 50 opened by being split by the blade body 7 so that the firewood 23 can be cracked more smoothly. At this time, in order to prevent damage to the mountain-shaped inclined surface 33 due to the striking pressure, as shown in FIG. 5B, the mountain-shaped inclined surface 32 is made of mountain-shaped iron or the like in contact with the mountain-shaped inclined surface 32. It is preferable to cover with a metal cover piece 51.

FIG. 6 shows a state in which the blade body 7 is supported by the left and right insertion openings 12 and 13, and the upper end (blade edge) 22 of the blade portion 10 is inclined at a required angle with respect to the horizontal plane. In such a configuration, it is preferable that the inclination angle of the upper end 22 of the blade portion 10 can be adjusted so that the optimum inclination angle can be obtained according to the material of the firewood 23 and the like. The inclination angle is set to, for example, an angle of up to 30 degrees. FIG. 6 shows an example thereof, in which the base end portion (the end portion of the hatchet 6 on the side where the handle 52 exists) 53 is positioned higher than in the case shown in FIG. Shows a state in which the upper end 22 of the above is inclined downward toward the tip 11. The inclination angle is set by interposing an angle adjusting piece between the base end portion 53 of the blade body 7 and the bottom portion 20 (FIG. 1) of the insertion opening 13 (the insertion opening on the right side in FIG. 6). Alternatively, the vertical position of the receiving piece 37 such as the bolt shaft 39 can be adjusted in height in two steps, for example.

When the upper end 22 of the blade portion 10 is tilted in this way, when the upper end 26 of the firewood 23 is pressed with a hammer, the upper end 22 of the blade portion 10 gradually bites into the lower end portion 55 of the firewood 23. Therefore, there is an advantage that firewood can be chopped more smoothly. Further, when the upper end 22 of the blade portion 10 is tilted in this way, the hatchet 6 is in a posture in which gravity acts in a direction opposite to the upward pulling direction (the direction indicated by the arrow in FIG. 6). Since it will be mounted on the support 5, the hatchet 6 can be mounted on the support 5 in a more stable state.

In the firewood chopping performed by using the firewood chopping device 1 having such a configuration, as shown in FIGS. 3 and 6, the lower end 25 of the firewood 23 is placed on the upper end 22 of the blade portion 10 of the hatchet 6, and then the blade portion 10 is far from the blade portion 10. The upper end 26 of the firewood 23 is pressed downward with a hammer, and the blade portion 10 is cut into the lower end portion 55 of the firewood 23 by the pressing force to split the firewood. In this respect, the chopping of firewood is clearly different from the conventional chopping of firewood using a hatchet, in which a heavy and dangerous hatchet is held with one hand and the blade of the hatchet is applied to the upper end of the hatchet to chop the wood.

FIGS. 7 to 8 show an example of a state in which the upper end 26 of the firewood 23 is pressed by the hammer 56 when the firewood 23 is cracked. The firewood 23 in FIG. 7 is relatively long. The firewood 23 in FIG. 8 is relatively short, and in this case, since the hand 57 holding the firewood 23 can be placed on the upper end 59 of any one of the support members 2 and 3, the hammer 56 strikes. The pressure can be applied in a more stable state.

Therefore, when chopping wood in outdoor activities such as camping, even the lower grades of elementary school can safely chop wood without touching the blade of the hatchet, and can easily and efficiently chop wood.

By pulling out the hatchet 6 as shown by the arrow F2 in FIG. 3, the hatchet 6 can be removed from the support base 5. Therefore, when transporting the wood-splitting device 1 according to the present invention, the wood-splitting device 1 can be divided into a support base 5 (FIG. 1) from which the hatchet 6 has been removed and a hatchet 6 housed in a sheath. Therefore, the wood chopping device 1 can be safely transported. The hatchet 6 removed in this way can be used for its original purpose by itself. Further, since the hatchet 6 can be removed, there is an advantage that the wood-splitting device 1 can be easily maintained, for example, the blade can be easily sharpened.

Further, since the blade 7 used in the wood-splitting device 1 according to the present invention is a commercially available hatchet that is easily available rather than a special dedicated one, the manufacturing cost of the wood-splitting device can be reduced. It is also possible to configure the wood-splitting device using the hatchet on hand. In this case, if only the support 5 is purchased, the wood-splitting device 1 can be made cheaper by combining the support 5 with the hatchet on hand. It will be possible to configure.

The configuration of the wood chopping device 1 according to the present invention can be changed as follows. That is, the insertion opening 12 into which the portion 15 of the insertion openings 12 and 13 on the tip 11 side of the blade 7 is inserted may be an opening whose outer end is closed. Further, the blade body 7 is mounted in the insertion openings 12 and 13 in a stable state, and the mounting means safely fixes the blade body 6 such as an engaging means, a pressing means, and a holding means. Various means that can be adopted can be adopted. Further, the hatchet 6 may be a double-edged hatchet in addition to the single-edged hatchet shown in the above embodiment.

1 Wood-splitting device 2 Strut member 3 Strut member 5 Support base 6 Hatchet 7 Blade body 9 One side 10 Blade 11 Tip 12 Insertion opening 13 Insert opening 15 Tip side 16 Base end 17 Other Side edge 19 Bottom 20 Bottom 22 Top 23 Firewood 25 Bottom 26 Top 27 Pedestal 29 Connecting member 30 Mountain-shaped inclined surface 35 Top 37 Receiving piece 39 Bolt shaft 41 Through hole 49 Bottom 51 Cover piece 56 Hammer
59 top

Claims (7)

It is a wood-splitting device that has a support base that has a pair of left and right facing support members and a hatchet that is detachably attached to the support base.
Left and right insertion openings that allow the blade of the hatchet to be inserted into the pair of left and right strut members from the tip in the length direction with the blade provided on one side of the blade facing upward. There is a part,
A portion of the blade on the tip end side and a portion on the base end side of the blade are inserted into the left and right insertion openings, the blade is bridged between the left and right strut members, and the blade With the hatchet attached state in which the other side edge of the body is supported by the bottoms of the left and right insertion openings, the lower end of the firewood is applied to the upper end of the upward blade portion and the upper end of the firewood is pressed downward. While the firewood can be split by the blade, the hatchet can be removed from the support by pulling the blade out of the left and right insertion openings.
The pair of strut members are made of wood, and a metal receiving piece that supports the other side edge of the blade from below is provided at the bottom of the left and right insertion openings. Device. The wood-splitting device according to claim 1, wherein the receiving piece is a bolt shaft penetrating the support column member, and the upper end portion of the bolt shaft in the penetrating state exists at the bottom portion of the insertion opening. With the blade inserted into the left and right insertion openings, the upper end of the blade is positioned higher than the tip of the blade so that the upper end of the blade is relative to the horizontal plane. The wood-splitting device according to claim 1 or 2, wherein the wood-splitting device is tilted to a required angle. The wood-splitting device according to claim 3, wherein the inclination angle of the blade portion can be adjusted. A pair of lower portions of the support members are connected by a connecting member, and the upper end portion of the connecting member is formed as a mountain-shaped inclined surface in which the front and rear portions of the upper end portion are inclined downward in the opposite direction. The wood-splitting device according to any one of claims 1 to 4, wherein the top of the mountain-shaped inclined surface is located substantially directly below the blade portion. The wood-splitting device according to claim 5, wherein the mountain-shaped inclined surface is covered with a mountain-shaped metal cover piece that abuts on the mountain-shaped inclined surface. A support base constituting the wood-splitting device according to any one of claims 1 to 6.

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