JP2019146942A - Floor covering corner cutter - Google Patents

Abstract

To provide a sheet cutter which can cut a floor covering from end to end during a cutting work for the floor covering.SOLUTION: This floor covering corner cutter having two shafts 6, 7 for movably connecting a body and a supporter which supports the body, cutters 3, 4 are ejected from the supporter by oscillatory movement of the body and the supporter.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a corner cutter for a floor covering that can cut a floor covering into a floor shape from end to end.

  Conventionally, when cutting a floor covering into the shape of the floor surface, the carpet cutter is pressed against the floor surface and the wall surface from the floor covering and slid along, but the excess edge of the floor covering is cut off. In the corners surrounded by, there will be uncut portions at the beginning and end of the cut. (Patent Document 1)

  There are sheet cutters that project the blades at both ends, but there is one rotation shaft for the circular motion, which is a structure for projecting the blades, and since it is above the cutting position, it can be left uncut at the end. (Patent Document 2)

  In addition, although there is an object with a single round motion rotation axis below the cutting position height, the blade enters the object to be cut from the part without the blade, so it is impossible to force from the part without the blade. The sheet that is to be pushed and cut is torn and damages the appearance of the surface (Patent Document 3)

  In order to solve the problem of the object with the rotating shaft at the lower part and to cut the floor covering, it was also considered that it can cut to the end by cutting in two directions, but the blade in two directions When a hardened floor covering is cut, the blade that has been attached will bend or spill over. In addition, the blade cannot be stably cut with the blade protruding at the end. (Patent Document 4)

JP 50-95900 JP2011-161193 JP2013-255774A JP2016-39894A

  Conventional carpet cutters have the following drawbacks. Since the blade protrudes in the vicinity of the central portion of the main body, in the corners surrounded by the wall surface, the main body portions in front of and behind the blade come into contact with each other and a portion that remains uncut is created. Since the floor covering is hard unlike the wallpaper, it is desirable to cut it at a cutting angle of about 60 ° with respect to the floor covering. Therefore, even if the blade of the cutter knife is provided at the end of the main body, the back portion of the blade of the cutter knife comes into contact with the side wall surface, so that it can be left uncut at the beginning of cutting. (Figure 3)

  In addition, there is a reason that the carpet cutter is not provided with the blade at the end portion but is provided close to the center portion of the carpet cutter. To cut off the floor covering, the carpet cutter is pressed against the floor and the wall surface from the floor covering and slid, but if the blade is located at the edge of the carpet cutter, the edge of the carpet cutter provided with the blade Since force must be applied, the end opposite the blade rises due to the repulsive force of the floor covering, making it difficult to cut stably. Therefore, it is provided so that the blade position is close to the center of the carpet cutter.

  The corner part of the floor covering cannot be cut, but the blades are provided at both ends, and the main body is tilted so that the sheet cutter that projects one of the blades (Patent Document 2) does not tilt the main body for safety reasons. The blade must not protrude from the main body or guide plate. Therefore, when the perfect circle rotation axis B is above the cutting position height A, the cutting edge C follows the trajectory of D with the B as an axis, so that the sheet end E can be left uncut. Also, a single flat guide plate cannot be pressed against the floor and wall surfaces to guide it, and the floor covering cannot be cut. (Fig. 4)

  A wall spatula cutter with a rotational axis of circular motion located below the cutting portion (Patent Document 3) is a circular motion with the center point of the arc of F as the rotational axis, and the cutting edge H is an arrow I. Move in the direction. For this reason, the blade will not enter the floor covering because it will be pushed in from the part J where the blade is not attached after contacting the cut object. Further, as described above, it is impossible to cut a floor covering with a single flat guide plate. (Fig. 5)

  The thing (patent document 4) considered to cut the floor covering was solved by solving the problems of the uncut residue (Patent Document 4). When cutting a hard floor covering, a blade that has been bladed in two directions with a thickness of 2 mm will cause broken or spilled tips. Further, since the floor covering is cut in a state where the blade is located at the end of the main body, it is difficult to balance the pressing force at the time of cutting the floor covering and it cannot be cut stably. In addition, the blade protruding during use cannot keep the tilt of the main body constant, and the blade may be retracted, and there is a risk that the blade will be caught when the opposite blade comes out. The present invention has been made to eliminate the above drawbacks.

Means for Solving the Invention

  FIG. 6 is a diagram showing the movement of the blade and shaft of the present invention by arrows. A left blade and a right blade are provided at both ends of the grip, and the main body is movably connected to the grip support plate by two shafts. At this time, the two shafts spread in a reverse C shape from the bottom to the top. If these two shafts are parallel, the left and right blades will only move at the same height, and if they are spread downward, the blades in the opposite direction will come out first. I can't cut the rug. The tip of the blade provided on the main body connected to the support plate with the shaft having the inverted C shape moves in the lateral direction and protrudes from the side surface of the grip support plate, and then moves downward to move the floor covering. Enter. This structure allows you to start cutting without leaving the edge of the floor covering.

  Then, when the connecting hole of the shaft becomes the bottom dead center, the rotation is automatically controlled and the danger of reverse rotation during cutting of the floor covering can be avoided.

  When connecting the sliding base and the sliding base cover, they are movably connected by a long slot in the horizontal direction. The blade provided on the main body moves to the sliding base center side when the main body is tilted and the blade is put out and force is applied in the cutting direction. By the movement of the blade, instability at the time of cutting the floor covering can be solved.

  Also, as a method of obtaining the same movement as the rocking movement by the shaft of the present invention, the track K and L of the connection point on the upper part of the shaft is provided on the main body support plate as a rail groove, and a protrusion that enters the rail groove is provided on the grip. The same blade movement can be obtained by sliding the grip and the grip support plate. (Fig. 7)

  In addition, since the grip moves closer to the center of the sliding base by extending the groove from the bottom dead center of the rail groove in the cutting direction, the blade position is the same as when the sliding base and the grip support plate are connected by a long hole. A relationship is obtained.

  By using a crescent-shaped blade, the cutting edge can reach the end and the cutting angle can be increased.

Effect of the invention

  By cutting the edge of the sheet that was left uncut by the conventional circular movement of the blade, the blade edge can be moved in the horizontal direction by taking in the movement of both levers by the two shafts provided in the reverse C shape It is possible to obtain an ideal elliptical trajectory that descends downward after being projected into the floor and cut the floor covering to the extreme end.

  In addition, by tilting the grip and projecting the blade and applying force in the cutting direction, the main body slides in the horizontal direction so that the blade touches the center of the sliding base and the hard flooring is stable. Can be cut with the right balance.

  Also, while the grip is tilted and the blade is pushed out and the force is applied in the cutting direction, the position of the tilted grip is automatically controlled to be stationary so that it is not only easy to apply force but also easy to cut. You can work safely without the danger of picking up the blade.

  In addition, by using a crescent blade, the floor covering can be cut from the edge, and the cutting angle between the blade attachment section and the floor covering can be increased, so even a hard and elastic floor covering can slide from the blade. Will not run away and will not be cut off.

It is a perspective view of the present invention. It is an exploded perspective view of the present invention. It is a figure of the position and angle of a conventional blade. It is a figure where the axis of rotation of perfect circle motion is above a cutting position. It is a figure in which the axis of rotation of perfect circle motion is below a cutting position. It is a figure showing movement of the blade of the present invention. FIG. 6 is a view of a grooved support plate that produces the same effect as movement by the shaft of the present invention. It is a figure of the blade suitable for this invention product.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Note that in the present specification and drawings, components having the same reference numerals have the same configuration or function.

  FIG. 1 is a perspective view showing the configuration of an example of a floor covering corner cutter according to the present invention, and a blade 3 and a blade 4 for cutting the floor covering are provided at both ends of the grip front side 1. The blades 3 and 4 may be straight cutters, but the cutting force can be further improved by using a crescent blade (FIG. 8).

  The grip 1 is movably connected to the grip support plate 5 by a left shaft 6 and a right shaft 7. A grip connection protrusion 10 provided on the grip 1 is inserted into the hole 8 at the upper part of the shaft, and a protrusion 9 at the lower part of the shaft is inserted into the support plate connection hole 11 of the grip support plate 5 and sandwiched between the grip surface 1 and the grip back side 2. The shaft 6 and the shaft 7 are spread from bottom to top so as to form a reverse letter C. With this structure, when the grip 1 is pushed down in the lateral direction, the blade 3 provided on the grip 1 or the cutting edge of the blade 4 follows an elliptical trajectory and enters the floor covering from directly above.

  The sliding base 12 is composed of a bottom surface along the floor surface and a side surface along the wall surface, and a gap for projecting the blade 3 and the blade 4 is provided between the bottom surface and the side surface.

  A protrusion 13 is provided on the bottom surface of the sliding base 12, and the protrusion 13 and the elongated hole 15 of the sliding base cover 14 are movably connected. The blade 3 or the blade 4 protruding at the time of cutting by the long hole 15 moves in the lateral direction of the cutting direction from the end of the sliding base cover toward the center when the grip 1 receives a force in the cutting direction. With this structure, the floor covering can be cut stably.

  The grip support plate 5 and the sliding base 12 are connected by a vertically long hole 16 provided in the grip support plate. When the support plate adjusting screw 17 is loosened, the distance between the grip support plate 5 and the wall surface during construction can be varied. With this structure, the distance between the blade 3 and the blade 4 provided at the end of the grip 1 can also be adjusted, and the length of the floor covering can be changed.

  Further, as a method of obtaining the same effect as the shafts 6 and 7, the grip support plate 5 is provided with a groove 18 similar to the track followed by the shaft upper hole 8, and the protrusion 10 along the groove 18 is provided inside the grip 1. In use, the blades 3 and 4 provided at the end of the grip 1 by movably connecting the pair of grooves 18 and the pair of protrusions 19 are protruded in the side of the main body like the shaft, and then the floor covering. Follow an elliptical orbit going down somewhere.

  The grooved grip support plate 19 extends the groove 18 from the lowermost part of the groove 18 toward the inner cutting direction. When a force is applied in the cutting direction during use, the grip connection projection 10 moves to the inside of the grip support plate, and similarly, the blade 3 or the blade 4 also moves from the end of the sliding base 12 to a portion closer to the center. When the protrusion 10 enters the groove 18 extended inward, the rotation of the grip 1 is also stationary. (Figure 7 bottom)

  When no force is applied by the support plate recess 20 and the spring 21, the blade 3 and the blade 4 are kept from protruding from the main body.

  The blade 3 and the blade 4 whose lengths are adjusted with a hexagon socket set screw placed in a screw hole provided in the blade fixing cover 22 are fixed. During use, the screw without the head does not contact the sliding base 12.

  The individual grooves 18 provided on the grip support plate 19 are composed of a perfect circular arc and a straight line, but the blade 3 and the blade 4 move in the lateral direction even if the arc portion is composed of an ellipse or a straight line. After that, there will be no problem if the rail can be lowered downward.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the form mentioned above. That is, it is understood that forms or various modifications that can be conceived by those skilled in the art within the scope of the invention described in the claims belong to the technical scope of the present invention.

1 grip front side 2 grip back side 3 left cutting blade 4 right cutting blade 5 grip support plate 6 left shaft 7 right shaft 8 shaft upper hole 9 shaft lower projection 10 grip connection projection 11 support plate connection hole 12 sliding base 13 sliding base connection projection 14 Sliding base cover 15 Horizontally long hole 16 Vertically long hole 17 Support plate adjustment screw 18 Sliding groove 19 Grip support plate with groove 20 Support plate recess 21 Center maintaining spring 22 Blade fixing cover 23 Blade fixing screw

Claims (6)

A first blade and a second blade,
A main body provided with the first blade and the second blade;
A cutter comprising: a support body movably connected to the main body; and moving the main body relative to the support body to eject the first blade or the second blade from the support body. Having two shafts for movably connecting a main body and a support supporting the main body;
The cutter according to claim 1, wherein a blade is projected from the support body by a swinging motion of the main body and the support body. A groove or protrusion provided in the body,
The cutter according to claim 1, wherein the main body and the support are movably connected by a groove or a protrusion provided on the support, and a blade is projected from the support by a swinging motion of the main body and the support. The bottom guide,
The blade is put out from between the guides having a portion extending in a substantially perpendicular direction on the bottom surface.
The cutter according to claim 1. Concave or convex provided in the support body enters the concave or convex provided in the main body,
The cutter according to claim 1, wherein the main body and the support are controlled to be stationary. The blade projecting at the end of the support body is moved laterally by movably connecting the body and the support body by a groove or protrusion provided on the body and a groove or protrusion provided on the support body. The cutter according to 1.