JP4056654B2 - Chamfer such as plasterboard - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chamfering tool for a gypsum board or a panel which is a base of a cloth and a surface material to be pasted on a wall or ceiling of a building.
[0002]
[Prior art]
The present inventor previously proposed as a Japanese Patent Application No. 11-043176 a chamfering tool such as a gypsum board which can finish the chamfering of the above-mentioned gypsum board and a panel (hereinafter referred to as a gypsum board) with a simple operation. is doing. This chamfering tool is useful because anyone can chamfer uniformly without requiring skill.
[0003]
[Problems to be solved by the invention]
The present invention is a further improvement of this, and has the above advantages and further ease of use and cost reduction.
[0004]
[Means for Solving the Problems]
Under the above-described problems, the present invention is a chamfering tool for chamfering a corner of a chamfered material, and this chamfering tool is a reverse V-groove having a constant depth in which a cross section for inserting a corner of the chamfered material is perpendicular to the bottom surface. A fixed blade angle that is mounted in a longitudinal direction on the main body and a concave portion formed on the upper surface of the main body so that the outer peripheral portion can cross the valley of the inverted V-groove and can rotate about the mounting shaft. A double-edged disk blade, and a lid formed with a sumi that can accommodate the disk blade on the back is placed on the disk blade so that the disk blade is sandwiched between the recessed part and the lid, and the mounting shaft There is provided a chamfering tool such as a gypsum board, characterized in that it is tilted forward in the chamfering direction in the extending direction of the reverse V-groove at an angle that is half or slightly larger than the angle of the disk blade . In other words, since the blade body is a rotating disk blade, the circumference can be used evenly, and the service life is prolonged. Further, such a chamfering tool has a simple structure in which a disk blade is rotatably attached to the main body, so that it is lightweight and easy to handle and can be manufactured at low cost.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a chamfering tool showing an example of the present invention, FIG. 2 is a rear view, FIG. 3 is a partial bottom view, FIG. 4 is a longitudinal sectional view of the main part, and FIG. However, the chamfering tool has a main body 10 and a disk blade 12 attached to the main body 10.
[0006]
The main body 10 is a long and thin rectangular parallelepiped having a width that can be grasped by a hand, and is made of wood, resin, aluminum, or the like. Although the upper surface of the main body 10 is formed as a flat surface, at least one inverted V-groove 14 having a right cross section is formed on the bottom surface. However, in this example, two reverse V-grooves 14 are provided side by side, and this example will be described below. The inverted V-groove 14 is formed by a central inclined surface 16 and an outer inclined surface 18, and a trough portion 22 where this intersects and a peak portion 20 where the central inclined surfaces 16 intersect each other form a ridge line and are long. Extending in the direction.
[0007]
Near one end of the main body 10, a disk blade 12 that traverses the valley 22 of the reverse V-groove 14 is rotatably provided. The disc blade 12 used in this case may be any one, but a double-edged blade that is commercially available for cross cutting or the like may be used as it is. According to such a thing, there exists an advantage which can be obtained cheaply.
[0008]
The disc blade 12 in this example is set at a right angle to the ridgeline of the valley portion 22 of the inverted V groove 14 in the transverse cross section of the main body 10 (FIG. 2), and at a constant angle α with respect to the ridgeline of the valley portion 22 in the vertical cross section. It is tilted (Figure 4). This is because the blade portion 12a of the disk blade 12 has a blade angle of 2α, and the blade surface of the blade portion 12a and the ridge line of the valley portion 22 are made parallel by inclining the half angle α. Because.
[0009]
Actually, it is preferable to incline the angle α slightly more than the angle α because the biting to the chamfered material is improved. On the other hand, when a single-edged blade 12 is used as the disk blade 12 and a straight surface is used for the bottom surface, this angle α is not necessary (in this case, too, it is actually better to bite slightly. preferable).
[0010]
A specific structure for mounting the disk blade 12 is such that a headed nut cylinder (mounting shaft) 24 is inserted into the main body 10 from the mountain portion 20 side so that the disk blade 12 is inclined at the angle α described above. The blade 12 is fitted and a lid 26 is covered, and a butterfly bolt 28 is screwed onto the mounting shaft 24 from above.
[0011]
A concave portion 30 is formed on the upper surface of the main body that covers the lid 26, and the lid 26 is inserted into the concave portion 30 so that the upper surfaces of the lid 26 and the main body 10 are substantially aligned. . Further, a countersink hole 32 is formed in the back surface of the main body 10 at the mountain portion 20 portion, and the head portion 24a of the mounting shaft 24 is submerged therein so as not to protrude. In addition, a screw 34 into which the disk blade 12 enters is formed on the back surface of the lid 26 so that the lid 26 does not press the disk blade 12 and restrict its rotation even if the butterfly bolt 28 is tightened.
[0012]
In the above configuration, the disk blade 12 crosses the valley portions 22 of the two inverted V grooves 14 respectively. In addition, since it is preferable for the disk blade 12 at this time to be chamfered at 45 ° to cross the central line of the valley portion 22 at a right angle, the angle of the peak portion 20 is made smaller than 90 ° so that it is as close as possible. I have to. However, the chamfering is performed in order to secure a space for inserting the putty, and therefore, it is usual that the angle is not so strict. In addition, an opening is provided in the main body 10 below the valley portion 22 into which the disk blade 12 enters, and the upper lid 26 is made narrow so that a substantially triangular cutting waste discharging window 36 can be formed in this portion. (FIG. 3).
[0013]
Next, a case where the chamfered material 38 such as a gypsum board is chamfered using the above chamfering tool will be described. FIG. 5 is a cross-sectional view of the main body 10 in the chamfered state viewed from the rear, but the chamfered material 38 is placed on an appropriate base 40, and the main body 10 is held by hand (in this case, the left hand). The inner inclined surface 16 of the V-groove 14 is applied to the upper surface, and the outer inclined surface 18 is applied to the side surface thereof. When the main body 10 is moved (pulled forward) in this state, the disk blade 12 chamfers the upper corner 42 of the chamfered material 38 while rotating.
[0014]
In this case, since the mounting shaft 24 of the disk blade 12 is inclined at an angle α, and the main body 10 where the disk blade 12 exists is formed with a window 36 for discharging cutting waste, the chamfering is performed just by operating the plane. Performs smoothly in a uniform state. On the other hand, when chamfering the corner 42 on the opposite side of the chamfered material 38, the main body 10 may be held with the right hand and another trough portion 20 may be applied to the corner 42. Therefore, it is not necessary to replace the chamfered material 38, and efficiency and labor saving can be achieved. However, this is merely an example, and in the present invention, at least one valley 20 may be provided.
[0015]
By the way, in this case, if the length of the outer inclined surface 18 is set to be equal to or less than the thickness of the chamfered material (gypsum board or the like) 38, the chamfered material 38 does not have to protrude from the base 40, which is convenient. It is. In addition, if only one reverse V-groove 14 is provided, it is exclusively for the right hand, and the formation of the left-hand groove is unnecessary.
[0016]
FIG. 6 is a cross-sectional view showing another example of the present invention. In this example, a rolling plate 44 having teeth 44a and the like formed on the outer periphery thereof is provided along with the disk blade 12. FIG. (46 is an integrated pin). According to this, since the teeth 44a of the rolling plate 44 bite into the chamfered material 30 and rotate without slipping, the disk teeth 12 are forcibly rotated accordingly, and the sharpness is improved.
[0017]
【The invention's effect】
As described above, according to the present invention, since cutting (chamfering) is performed with a rotating disk blade, the blade portion can be used evenly on the circumference, and the service life is prolonged. In addition, since the structure is simple and the operation is easy, anyone can easily and uniformly chamfer the surface. In addition, since the opposite corners can be chamfered as they are by holding them with the left and right hands, it is not necessary to replace the gypsum board, which is labor-saving and increases the efficiency. In addition, since the structure is simple, it can be manufactured at low cost.
[Brief description of the drawings]
FIG. 1 is a plan view of a chamfering tool showing an example of the present invention.
FIG. 2 is a rear view of a chamfering tool showing an example of the present invention.
FIG. 3 is a partial bottom view of a chamfering tool showing an example of the present invention.
FIG. 4 is a longitudinal sectional view of a main part of a chamfering tool showing an example of the present invention.
5 is a cross-sectional view taken along the line AA in FIG.
FIG. 6 is a cross-sectional view of a main part of a chamfering tool showing another example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Main body 12 Disc blade 14 Reverse V groove 24 Mounting shaft 26 Cover 30 Recessed part 34 Nusumi 38 Chamfering material

Claims (1)

A chamfering tool for chamfering a corner of the chamfered material, and the chamfering tool has a main body in which a reverse V-groove having a constant depth with a right-angled cross section for inserting a corner of the chamfered material is formed in the longitudinal direction on the bottom surface; A double-edged disk blade mounted on a recess formed on the upper surface of the main body and having an outer peripheral portion that is rotatably mounted around the mounting shaft across the valley of the inverted V-groove and having a fixed blade angle On the other hand, cover the disk blade with a lid that can hold the disk blade on the back, and sandwich the disk blade between the recessed part and the cover, and the mounting shaft is half the blade angle of the disk blade. A chamfering tool such as a plaster board, which is forwardly inclined in the chamfering direction in the extending direction of the reverse V-groove at a slightly larger angle .

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