JP6218155B2 - Gypsum board chamfer - Google Patents

Description

  The present invention relates to a chamfering gutter for a plaster board used for interior construction of a building, and in particular, it can cut the paper affixed to the front and back of the plaster board without losing the sharpness of the cutter blade, The present invention relates to a chamfering pad for a gypsum board that is easy to operate and can easily adjust the chamfering width.

  Protective paper is pasted on the front and back surfaces of gypsum board used as various building material boards, and both ends in the longitudinal direction of the gypsum board are chamfered at a predetermined angle from the front surface to the lower surface. .

  An example of such a gauze chamfering gutter is disclosed in Patent Document 1.

  This chamfering chamfer for a gypsum board is provided with an inclined surface for attaching a blade to the center of the upper surface of the main body. The inclined surface has an inclination angle in the longitudinal direction of the ridge and also exhibits an inclination angle in the width direction. On the inclined surface in the longitudinal direction, a through hole is provided toward the groove on the back surface, and the blade is mounted on the inclined surface in the width direction so as to straddle the through hole.

  When attaching the blade, the blade is placed on an inclined surface in the longitudinal direction, and the placed blade is pressed from above by a fixing bracket. The fixing bracket is provided with two left and right elongated holes, and two screws to be screwed into the main body are attached while being loosely fitted into the two elongated holes, respectively. The position of the blade is adjusted by each of these two long holes and a fixing bracket made of screws.

  The fixing bracket is pressed in by holding the blade and the blade is pressed in, and the position is fixed. In this state, when chamfering the end face of the desired width of the gypsum board with the chamfering gutter, the chamfered part of the gypsum board is aligned with the groove of the main body of the gypsum board to chamfer the gypsum board.

  By the way, in a hoe for cutting wood, a blade is generally attached at an angle of 38 degrees with respect to the longitudinal direction with respect to the horizontal surface of the hoe. Even for a hoe that cuts softwood such as cedar, this attachment angle is a little over 30 degrees.

  On the other hand, in the case of a chamfer for chamfering a gypsum board, for example, as described in Patent Document 2, there is a case in which a slimming (cutter blade) is attached at an angle of 20 degrees.

  According to the chamfering pad for gypsum board described in Patent Document 2, the blade mounting angle α with respect to the width direction is set to 60 degrees, the inclination angle of the slime with respect to the front surface of the slider is set to 20 degrees, and the blade is cut out at the blade edge. Fix the gypsum board of 2mm in thickness and 12.5mm in thickness in a state inclined at 45 degrees with respect to the vertical surface, and use the chamfering guide surface of the guide groove of the slider in the board cutting paddle as the edge of the gypsum board As a result of chamfering, it has been reported that a sharpness of 1.5 times can be obtained with respect to the comparative example in which the inclination angle in the width direction is 30 degrees.

JP 2004-351737 A JP 2010-042576 A

  By the way, the most important thing in chamfering this gypsum board is to clean the paper affixed to the front and back of the gypsum board. For that purpose, the attachment angle of the blade in the longitudinal direction becomes very important. If it is 90 degrees, the cutter will only rub against the surface without entering the paper, and if it is 0 degrees, the cutter's bladed shoulder and bottom face will always come into contact with each other, and it will hold down the paper. Absent.

  On the other hand, in Patent Document 1, although there is a reference to the blade attachment angle in the longitudinal direction and the inclination angle in the width direction, there is no mention of a specific appropriate value. Further, in Patent Document 2, if the inclination angle in the width direction is set to 60 degrees and the inclination angle in the longitudinal direction is set to 20 degrees, a sharpness 1.5 times that obtained when the inclination angle is set to 30 degrees is obtained. Although it has been reported, there is no consideration as to whether the paper affixed to the front and back of the most important gypsum board chamfer can be cut cleanly.

  Actually, the applicant applied the same conditions as in Patent Document 2, that is, the inclination angle in the width direction was set to 60 degrees, the inclination angle in the longitudinal direction was set to 20 degrees, the amount of blade protrusion at the blade edge was 2 mm, and the thickness 12. When chamfering was performed with a 5 mm gypsum board inclined at 45 degrees with respect to the vertical plane, the cutting edge was pressed from above and the cutter blade itself was thin. I found that it floats and vibrates. As a result, when the sharpness of the cutter blade is lowered, there is a problem that the paper stands up without being cut, or is caught on the paper and the paper is torn or turned up.

  On the other hand, the conventional scissors had a rectangular shape as a whole as a basic shape, but this is good for hooking a plane in the first place, but it is difficult to hold for planes that chamfer 45 degrees, Also, there was a problem that the hands were tired because they were gripping strongly.

  Furthermore, although both Patent Documents 1 and 2 refer to fixing the cutter blade in a fixed position, there is no mention of adjusting the chamfering width of the gypsum board by moving the cutter blade. I don't have any assumptions.

  Therefore, the object of the present invention is to clean the paper affixed to the front and back of the gypsum board without losing the sharpness of the cutter blade, and to easily adjust the chamfer width with good operability. The object is to provide a chamfer for a gypsum board.

The present invention, in order to achieve the above object, the longitudinal direction in the guide groove is formed on the lower surface of鉋台body, the cutter blade on the inclined surface and the inclined surface of the cutter blade is mounted on the upper surface of該鉋rest body a through hole penetrating in the guide grooves of the lower surface of the fitting and the該鉋rest body tightening is provided to tighten,該締the cutter blade in a state in which the cutting edge is protruded of the cutter blade into the guide groove through the through hole tightened with fitting, a chamfering plane chamfering cut clean paper affixed to the front and back of the gypsum board when performing chamfering the guiding groove is brought into contact with the edge of the gypsum board, the cutting blade angle of the inclined surface which is tightened, the鉋台Ri range der of 10 to 15 degrees with respect to the lower surface of the horizontal plane of the body, the angle between the angle and the total angle of cutting edge of the cutter blade of the inclined surfaces is 20 degrees and wherein less than 30 degrees der Rukoto more There is provided a chamfer for the plane of the gypsum board that.

  In the above configuration, it is desirable that the upper and lower surfaces of the table main body are chamfered at 40 ° to 50 ° at both corners in the longitudinal direction.

  Further, it is desirable that a guide groove for guiding the movement of the fastening bracket in the longitudinal direction is formed on the upper surface of the base body.

Furthermore, fitting the tightening includes a protrusion to be inserted into the guide groove, wherein a mounting portion for mounting a ridge of the cutter blade, ridge is the placed cutter blade the mounting section wherein A cutter blade pressing portion that is pressed by a peak portion and an intermediate portion of the blade edge , and the cutter blade moves on the inclined surface in accordance with the movement in the longitudinal direction of the fastening bracket while being pressed by the cutter blade pressing portion. It is desirable to do.

As described above, according to the present invention, the guide groove is formed in the longitudinal direction on the lower surface of the base body, the inclined surface on which the cutter blade is placed on the upper surface of the base body, and the tightening that tightens the cutter blade on the inclined surface. An attachment fitting and a through-hole penetrating the guide groove on the lower surface of the base body are provided, and the cutter blade is clamped to the clamping blade in a state where the blade edge of the cutter blade protrudes into the guide groove through the through-hole. The chamfering scissors are chamfered by chamfering the guide groove with the edge of the work building material board, and the angle of the inclined surface to which the cutter blade is tightened is set to the horizontal surface of the bottom surface of the base body. On the other hand, the angle between the angle of the inclined surface and the angle of the blade edge of the cutter blade is 20 degrees or more and less than 30 degrees so that the cutter blade does not wobble during use. So cut the cutter blade sharpness The paper, which is affixed to the front and back of the gypsum board can be cut to clean without.

Further, according to the present invention, the longitudinal corners of the upper surface and the lower surface of the base body are chamfered to 40 to 50 degrees, and the movement of the fastening bracket in the longitudinal direction is guided on the upper surface of the base body. a guide groove formed in the fastening bracket, and to have a protrusion to be inserted into the guide groove, a mounting portion for mounting said cutter blade, and a cutter blade pressing part for pressing the cutter blade Therefore, it is possible to provide a gypsum board chamfering ridge that has good operability and can easily adjust the chamfer width.

FIG. 1 is a perspective view showing a configuration of a chamfering chamfer for a gypsum board. Fig.2 (a) is a top view which shows the structure of the chamfering gutter of a gypsum board, FIG.2 (b) is a bottom view which shows the structure of the chamfering gutter of a gypsum board. Fig.3 (a) is a left view which shows the structure of the chamfering gutter of a gypsum board, FIG.3 (b) is a right view which shows the structure of the chamfering gutter of a gypsum board. FIG. 4A is a front view showing the configuration of the chamfering gutter for the gypsum board, and FIG. 4B is a rear view showing the configuration of the chamfering gutter for the gypsum board. FIG. 5 is a diagram illustrating the configuration of the fastening member. FIG. 6 is a diagram showing the configuration of the table. FIGS. 7A to 7C are diagrams comparing the mounting angles of the cutter blades between the chamfering scissors of this embodiment and the conventional scissors. 8A to 8D are diagrams showing a comparison of cutting tests.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the configuration of a chamfering gutter for a gypsum board, FIG. 2 (a) is a top view showing the configuration of a chamfering chamfer for a gypsum board, and FIG. 2 (b) is a gypsum board. FIG. 3 (a) is a left side view showing the configuration of the chamfering gutter of the gypsum board, and FIG. 3 (b) is a diagram of the chamfering gutter of the gypsum board. FIG. 4 (a) is a front view showing a configuration of a gypsum board chamfering ridge, and FIG. 4 (b) is a rear view showing a configuration of a gypsum board chamfering ridge. It is.

  As shown in FIGS. 1 and 2 (a) to 2 (b), the main body 1 for chamfering includes a gripping portion 11, a pedestal surface 12 on which a slimming body 20 is placed, and a pedestal surface 12 on the upper surface side of the gantry 10. The blade opening 13, the fastening member 14 for fastening and fixing the slimming body 20 from the blade opening 13, and the guide for guiding the movement of the fastening member 14 in the longitudinal direction of the table 10. The groove 15 and the knob 16 are provided, and on the lower surface side, as shown in FIGS. 4A to 4B, a guide groove 17 that is recessed in a concave shape along the longitudinal direction of the table 10 main body, have.

  The gantry 10 is made of resin and has a substantially rectangular shape. Since the gantry 10 is made of resin, the slidability of the surface that contacts the gypsum board is good and the resistance is reduced. Therefore, the chamfering operation of the gypsum board can be performed without applying extra force.

  The slimming body 20 is obtained by folding a commercially available folding blade type cutter blade for a cutter knife into a required length. That is, the slimming body 20 is a steel plate shape, a sharp blade is formed on one side edge in the width direction, and the opposite edge is a peak.

  The gripping part 11 has a structure in which both corners of the upper and lower surfaces of the rectangle are chamfered vertically by 40 to 50 degrees. Preferably, both corners are chamfered at an angle of 45 degrees. By adopting such a structure, it becomes easy to grip the upper surface with a finger and the lower surface with a finger. At the same time, it becomes easier to apply a pressing force during use. A plurality of long grooves 18 are formed in parallel to the guide grooves 17 on both sides of the guide grooves 17 formed on the lower surface side. The long groove 18 is provided so that the first joint of the finger can be easily hooked in the groove while gripping the grip portion 11. By providing the long groove 18 in this manner, it can be carried so as to be hooked without being strongly gripped.

  As shown in FIG. 3, the pedestal surface 12 is formed so as to have an inclination angle α (an inclination angle of 10 degrees to 15 degrees) with respect to the longitudinal direction of the base 10 main body. Further, as shown in FIG. 1, a blade edge 13 is formed in the approximate center of the pedestal surface 12. The pedestal surface 12 is also formed with a plurality of adjustment grooves 12a in parallel so that it can be easily adjusted to project a part of the slimming body 20 from the blade edge 13 by an arbitrary amount.

  As shown in FIGS. 5A to 5B, the fastening member 14 is made of metal and has a substantially triangular shape, and an elongated through hole 14a is formed on the upper surface thereof. In addition, a pressing portion 14b that hangs downward and presses down the slimming body 20 on one side of the two sides of the substantially triangular shape, and an abbreviation that places the vicinity of the peak portion of the slimming body 20 on the back side of the pressing portion 14b. It has a Z-shaped mounting portion 14d, and has a ridge portion 14c that hangs downward and is inserted into the guide groove 15 on the other side.

  The fastening member 14 is inserted into a bolt 30 (see FIG. 6) fixed to the main body 10 through the through hole 14a. When the fastening member 14 is inserted through the bolt 30, the protrusion 14 c of the fastening member 14 is inserted into the guide groove 15.

  On the other hand, the mounting portion 14 d has the same inclination angle as the pedestal surface 12. And the peak part of the slimming body 20 penetrated from the slight clearance gap between the holding | suppressing part 14b and the base surface 12 is mounted in this mounting part 14d. When the fastening member 14 body is tightened with the knob 16 in a state where the peak portion of the slimming body 20 is placed on the placement portion 14d, the pressing portion 14b is the surface of the slimming body 20 and is brought into contact with a substantially intermediate portion between the blade edge and the peak portion. The slimming body 20 is fixed to the pedestal surface 12 by touching and pressing.

  Since the peak portion of the slimming body 20 is placed on the placement portion 14 d, when the knob 16 is loosened and the fastening member 14 is moved along the guide groove 15, the placement portion 14 d is the same as the pedestal surface 12. Since it has an inclination angle, the slimming body 20 also moves along the pedestal surface by the length direction of the long hole-like through hole. In other words, the slimming body 20 also moves up and down (refers to the upper part and the lower part of the part indicated by reference numeral 12 in FIG. 6B) with respect to the horizontal plane as the fastening member 14 moves. If the slimming body 20 is moved in the lower direction and is fastened and fixed with the fastening member 14 in accordance with the arbitrary adjustment groove 12a, the chamfering width can be increased, and if the slimming body 20 is moved in the upper direction, the chamfering width is reduced. be able to.

  The slimming blade adopted here is a thin cutter blade, and if it is not pressed properly, chatter may occur or float when used. With this mechanism, the chamfering width can be freely adjusted at any position while keeping the slimming (thin cutter blade) at the optimum position.

  When the sharpness of the blade of the slimming body 20 falls, the knob 16 is loosened and moved in the left-right direction with the vicinity of the peak portion of the slimming body 20 being placed on the placement portion 14d. 13 is projected. Then, by tightening the fastening member 14 with the knob 16, the slimming body 20 is fastened and fixed.

Next, since the cutting test with respect to the gypsum board was done, the result is demonstrated.
FIGS. 7A to 7C are diagrams comparing the mounting angles of the cutter blades between the chamfering scissors of this embodiment and the conventional scissors.
FIG. 7 (a) shows a cutter blade (single blade) attached to a 10 ° pedestal surface, and FIG. 7 (b) shows a cutter blade (both blades) attached to a 10 ° pedestal surface. FIG. 7C shows a cutter blade (both blades) attached to a pedestal surface of 20 °.

  First, in the case of FIG. 7A, as shown in the figure, the cutting edge angle is thinner than both blades, and the gypsum board rises slightly and cuts slightly, but there is no gap between the cutter blade and the pedestal and there is no vibration. In the case of FIG.7 (b), a blade edge | tip enters horizontally, and it can cut according to the blade edge grinding | polishing angle of a cutter blade, and can be cut smoothly. Further, in the case of FIG. 7C, the cutting edge is pressed and cut from above, but the cutter blade itself is thin, so that it floats or vibrates as a whole.

Thus, it is optimal that the inclination angle of the pedestal surface 11 on which the cutter blade is installed is 10 °.
When the angle of the cutter blade is set to 10 °, only the surface of the cutter blade attached to the paper comes into contact with the paper, and since the cutting edge is slightly over 30 °, the paper can enter the paper.

  When the angle of the cutter blade is closer to 0 ° than 10 °, the cutting edge faces upward with respect to the second blade, and the cutter blade is chamfered to escape from the paper. Then you have to always hold it down when you work. Also, if the cutter blade rises above 15 °, the paper will be gradually scraped.

  Therefore, if a single-edged cutter blade is used as a slimming body, a force that suppresses the whole of the single-edged blade is applied, so that it is difficult for vibration to occur and the blade is difficult to crack, and it is possible to maintain sharpness.

<Cutting test 1>
Next, a cutting test will be described.
8A to 8D are diagrams showing a comparison of cutting tests.
In the cutting test, the chamfering scissors 1 according to the present embodiment in which the angle at which the cutter blade is installed is inclined by 30 ° with respect to the width direction of the scissors main body was compared with the conventional scissors.
In addition, the allowance of the blade was set to 2 mm, and a test was performed with a new cutter blade and a cutter blade with slightly reduced sharpness.

As shown in FIGS. 8 (a) and 8 (b), the dark portion of 1/3 color at the top of the photograph is the paper portion affixed to the upper surface of the gypsum board. And the lower 2/3 white part is the gypsum board.
As shown in the drawing, it can be seen that the chamfering scissors 1 according to this embodiment and the conventional scissors are relatively straight and well cut. In addition, the gypsum board part has been scraped off neatly because the gypsum board part has been cut off with a conventional scissors. On the other hand, it is considered that the chamfering scissors 1 of the present embodiment are cut while pressing the gypsum slightly on the surface of the cutter blade with a 20-degree cutting edge.

  Next, in the case where the cutter blade was sharply cut and tested, as shown in FIGS. 8 (c) and (d), the chamfering scissors 1 according to the present embodiment slightly cut the paper. It can be seen that the wave of the wave is getting bigger and the sharpness is falling. However, the paper still doesn't stand up or get caught on the paper and tear it. On the other hand, in the conventional kite, it can be seen that the paper enters the gypsum portion like a fiber thread. This clearly means that the sharpness has fallen.

  As described above, it can be seen that the chamfering scissors according to the present embodiment are sharper than the conventional scissors and the cutter blade lasts longer.

<Cutting test 2>
In the cutting test 2, the force when the gypsum board starts to be cut with a scissors is measured.
In addition, the measuring method measured the force when a gypsum board starts to cut by the weight concerning a scale.

-New blade Chamfering bowl of this embodiment 1.1-1.2 kg
Conventional bag 1.3-1.5kg

・ Used blade Chamfering scissors of this embodiment 2.2 to 3.2 kg
Conventional bag 2.5-3.8kg

  As described above, the chamfering trough of the present embodiment can be chamfered with a lighter force from the time when the cutter blade is new until the sharpness drops.

DESCRIPTION OF SYMBOLS 1 Chamfering ridge 10 Scaffolding base 11 Holding part 12 Base surface 12a Adjustment groove 13 Cutting edge 14 Fastening member 15 Guide groove 16 Knob 17 Guide groove 20 Slimming 30 Bolt

Claims (4)

A guide groove is formed in the longitudinal direction on the lower surface of the base body, an inclined surface on which the cutter blade is placed on the upper surface of the base body, a clamp for tightening the cutter blade on the inclined surface, and the guide on the lower surface of the base body A through-hole penetrating the groove is provided, and the cutter blade is fastened with the fastening fitting in a state where the cutting edge of the cutter blade projects into the guide groove through the through-hole, and the guide groove is fastened to the edge of the gypsum board A chamfering scissor that cuts and chamfers the paper affixed to the front and back of the gypsum board when chamfering by contacting the part,
Angle of the inclined surface of the cutter blade is tightened, the鉋台Ri range der of 10 to 15 degrees with respect to the lower surface of the horizontal plane of the body, the sum and the angle of the cutting edge of the angle between the cutter blade of the inclined surface angle There plane chamfering gypsum board, characterized in der Rukoto less than 20 degrees 30 degrees.   2. The chamfer for a gypsum board according to claim 1, wherein the upper surface and the lower surface of the table main body are chamfered at 40 ° to 50 ° at both corners in the longitudinal direction.   The gutter board chamfering gutter according to claim 1, wherein a guide groove for guiding the movement of the fastening bracket in the longitudinal direction is formed on the upper surface of the gutter base body. It said bracket clamping said a protrusion to be inserted into the guide groove, wherein a mounting portion for mounting a ridge of the cutter blade, the peak portion of the cutter blade ridge is placed on the placement section wherein and a cutter blade pressing part for pressing the middle portion of the cutting edge, the cutter blade to move the inclined surface with the longitudinal movement of the cutter blade pressing said clamping in a state of pressing was the portion fitting with The gutter for chamfering a gypsum board according to claim 3 .