JP4302009B2 - Cutting tool for channel material - Google Patents

Description

  In the present invention, when installing a lighting fixture or an air-conditioning duct air outlet on the ceiling lower surface side of a building, an opening is formed in a required portion of the ceiling board, and then disposed on the back side of the ceiling board. The present invention relates to a cutting tool for a groove member used for cutting a field edge receiving member made of a groove member as a ceiling base.

  Although conventional documents such as patent documents cannot be specifically mentioned as conventional technology, conventionally, a conventional type of metal cutter or a pair of clippers is used to cut the field receiver as described above. A cutting tool called a channel cutter that is opened and closed via a ratchet mechanism is used.

  With the above-mentioned metal cutting bar, it is difficult to cut the groove shape material which is a field edge holder, and it takes a lot of labor and time, and the cut edge part is easily deformed or damaged, which may hinder the subsequent work. There is. In addition, the above-mentioned channel cutter is very easy to cut and can be cut appropriately without deforming the cut end. However, in order to cut the groove shape material at one place, the opening / closing operation rod (ratchet handle) is turned 10 times. Since it is necessary to oscillate to some extent, it takes a very long time and the work efficiency is poor.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a grooved material cutting tool that can easily and easily cut a grooved material such as a field edge holder by simply closing and closing the gripping rod for opening and closing operation once. And

Means for solving the above problems will be described with reference numerals in the embodiments described later. The cutting tool for a grooved material of the invention according to claim 1 includes both side plate portions a and b, a bottom plate portion c, A cutting tool for cutting a groove member 10 comprising a U-shaped cutting blade 3 formed on the outer surface side of the bottom plate portion c on the groove member 10 to be cut. The first clip 1 and a trapezoidal cutting edge 4 facing the U-shaped cutting edge 3 of the first clip 1 are provided on the tip side, and the groove member 10 is formed in cooperation with the first clip 1. The first clip 2 and the second clip 2 are composed of a second clip 2 and a holding clip 5 for opening / closing operation respectively connected to the rear ends of the clamps 1 and 2. The U-shaped cutting blade 3 and the trapezoidal cutting blade 4 open and close each other, and when closing, the two cutting blades 3 and 4 do not overlap each other from the front side cutting blade portion to the front side cutting blade portion. Closed, time so that both cutting edges 3 and 4 is opened while successively away from the front cutting edge to the other party side cutting edge portion opening are pivotally by pivot 7, and the first pinching lever 1 co The letter-shaped cutting edge 3 is composed of a front side edge 3a, a front side edge 3b, and a vertical edge 3c connecting both side edges 3a and 3b. The front oblique side edge 4a corresponding to the front lateral edge 3a of the U-shaped cutting blade 3, the front oblique side edge 4b corresponding to the front lateral edge 3b of the U-shaped cutting blade 3, and the U-shaped Corresponding to the vertical edge 3c of the cutting edge 3, it consists of a straight edge 4c that connects both oblique edges 4a, 4b, and the tip of the straight edge 4c that intersects the front oblique edge 4a of the trapezoidal cutting edge 4 The portion 4o rises in a round shape or a diagonal straight line, and the crossing corner of both edges 4a and 4c. It is characterized by forming a pointed-shaped projections 8.

Claim 2 is the groove profile cutting tool according to claim 1, each rear end portion of the first pinching lever 1 and the second pinch rod 2 is connected directly to opening and closing gripping rod 5, 6 It is characterized by.

Claim 3 is the groove profile cutting tool according to claim 1, each rear end portion of the first pinching lever 1 and the second pinch rod 2, the grip rod 5 for opening and closing via a toggle joint T , 6 are connected to each other.

  The effect of the invention by the above-described solution means will be described with reference numerals in the embodiments described later. According to the groove shape cutting tool of the invention according to claim 1, the first pin 1 and the second pin From the state where the two are opened to each other, the groove fitted to the first pin 1 is simply operated by closing both the pines 1 and 2 with the two opening / closing grips 5 and 6. The shape member 10 can be easily cut, and the cutting portion can be cut accurately and beautifully without being broken or deformed.

Further , according to the cutting tool for grooved material of the present invention , the front end portion 4o of the linear edge 4c intersecting the front oblique side edge 4a of the trapezoidal cutting blade 4 rises into a round shape or an oblique linear shape, and the front side Since the intersecting corner portion of the hypotenuse edge 4a and the straight edge 4c forms a sharp projection 8, the tip side hypotenuse edge 4a of the trapezoidal cutting edge 4 becomes the channel profile when cutting the channel profile 10. Immediately before the cutting of the front side plate portion 10 of the groove 10, the sharp projection 8 bites into the inner surface side end portion of the bottom plate portion c of the groove member 10, and thereby the front side plate portion a and the bottom plate portion of the groove member 10. The corner portion k1, which is difficult to cut between c, can be easily cut by cutting from the front side.

According to the grooved material cutting tool of the invention according to claim 2 , the rear end portions of the first clip rod 1 and the second clip rod 2 may be directly coupled to the opening / closing operation grip rods 5 and 6, respectively. The structure is simple and the manufacture is easy.

According to the groove shape cutting tool of the invention of claim 3 , the gripping force (grip force) in the opening / closing operation gripping rods 5, 6 is changed by the toggle joint T to the U-shaped cutting of the two pinching rods 1, 2. Since it is increased at the blade 3 and the trapezoidal cutting blade 4 to generate a large shearing force, the cutting work of the groove member 10 can be performed easily.

  FIG. 1 is an overall schematic front view of a grooved material cutting tool A according to the present invention, and FIG. 2 (a) shows first and second sandwiching rods 1 and 2 which are essential parts of the grooved material cutting tool A. FIG. 3B is an enlarged front view of the second pin 2 seen from the front side, FIG. 3B is a side view of the pin 1 and 2 seen from the direction of the arrow X in FIG. 3A, and FIG. It is a front view in the state where the 1st and 2nd pinching rods 1 and 2 shown in (a) were turned upside down. 4 to 7 show the operation of the grooved material cutting tool A. FIG. 1 and 4 to 7 show a groove member 10 which is a field receiver disposed as a ceiling base on the back of a building. The groove shape member 10 is a channel-like shape member made of a steel plate including both side plate portions a and b and a bottom plate portion c.

  As shown in these drawings, the grooved material cutting tool A of the present invention is a U-shaped cutting formed so as to be fitted from the outer surface side of the bottom plate part c to the grooved material 10 to be cut. A first clip 1 provided with a blade 3 on the tip side and a trapezoidal cutting blade 4 facing the U-shaped cutting blade of the first clip 1 are provided on the tip side for cooperation with the first clip 1 The second holding rod 2 that sandwiches the channel member 10 by the shearing force generated by the first and second holding rods 1 and 2 and the opening / closing operation holding rods 5 directly connected to the rear ends of the first and second holding rods 1 and 2, respectively. 6 and the first pin 2 and the second pin 2 as shown in FIGS. 4 to 7, the U-shaped cutting blade 3 and the trapezoidal cutting blade 4 open and close each other, When closing, both cutting edges 3 and 4 are closed while overlapping one another from the front side cutting edge part to the front side cutting edge part, and when opening, both cutting edges 3 and 4 are the front side. To open while sequentially away from the edge portion to the other party side cutting edge is pivotably mounted by a pivot 7.

  The structure of the above-mentioned groove shape cutting tool A will be described in more detail. As shown in FIGS. 2 and 3, the U-shaped cutting blade 3 of the first pin 1 has a front side edge 3a and a front side side. The side edge 3b and the vertical side edge 3c that connects the side edges 3a and 3b are formed in a U shape so that the groove 10 to be cut can be lightly fitted from the outer surface side of the bottom plate portion c. The trapezoidal cutting edge 4 of the second pin 2 has a front side oblique edge 4a corresponding to the front side edge 3a of the U-shaped cutting edge 3 and a front side edge 3b of the U-shaped cutting edge 3. It is formed in a trapezoidal shape by a corresponding front oblique side edge 4b and a linear edge 4c corresponding to the longitudinal side edge 3c of the U-shaped cutting blade 3 and connecting the oblique side edges 4b, 4b. The groove member 10 fitted to the ridge 1 is sandwiched by the shearing force generated by the cooperative operation with the first nip 1.

  The trapezoidal cutting edge 4 of the second pin 2 has a tip portion 4o of a straight edge 4c that intersects the front oblique side edge 4a rising in a rounded shape so that the front oblique side edge 4a and the straight edge 4c intersect. The corners form sharp projections 8. The sharp projection 8 will be described later.

  As shown in FIG. 1, the rear ends of the first clip rod 1 and the second clip rod 2 are integrally connected to the opening / closing operation grip rods 5 and 6 by rivets and other fixing tools 18, respectively. . Both sandwiching rods 1 and 2 are made of steel, but aluminum gripping rods 5 and 6 are made of aluminum alloy in order to reduce the weight as much as possible. Further, synthetic resin grips 5a and 6a are attached to the rear end portions of the sandwiching rods 1 and 2, respectively. The grooved material cutting tool A has a simple structure because the rear ends of the first pin 1 and the second pin 2 need only be directly connected to the opening / closing grips 5 and 6. Manufacture is easy.

  With reference to FIG. 1 and FIGS. 4 to 7, the case of cutting the groove member 10 used as the edge receiver for the ceiling foundation using the groove member cutting tool A configured as described above. In other words, as shown in FIG. 1, the operator holds both the sandwiching rods 1 and 2 of the cutting tool A below the cutting portion of the groove member 10 with the gripping rods 5 and 6 for opening / closing operation held by both hands. Bring it to the position. Then, the gripping rods 5 and 6 are further expanded from the state shown in FIG. 1 so that both the pinching rods 1 and 2 are sufficiently opened. In this state, the U-shaped cutting blade 3 of the first pinching rod 1 is grooved. It fits from the outer surface side of the baseplate part c with respect to the profile 10, and it shall be in the state as shown to (a) and (b) of FIG.

Thus, when the U-shaped cutting blade 3 of the first pin 1 is fitted to the groove member 10, the first pin is fixed so that the U-shaped cutting blade 3 is fixed at the fitting position with the groove member 10. With the gripping rod 5 on the heel 1 side (see FIG. 1) firmly held and fixed with one hand, the gripping rod 6 on the second pinching rod 2 gripped with the other hand is the first pinching rod 1 When the trapezoidal cutting blade 4 of the second pin 2 is closed with respect to the U-shaped cutting blade 3 of the first pin 1, this base As shown in FIG. 5 (a), the front side oblique edge 4a of the shape cutting edge 4 overlaps the front side lateral edge 3a of the U-shaped cutting edge 3 in an oblique direction so as to be in contact with the front side lateral edge 3a. The front side plate portion a of the groove member 10 is cut by the shearing force generated by the cooperative operation. The cutting state of the side plate a is shown in FIG.
Shown in

  And just before the front-side hypotenuse edge 4a of the trapezoidal cutting edge 4 finishes cutting the front-side plate portion a of the groove member 10, the sharp shape at the intersection angle between the front-side hypotenuse edge 4a and the linear edge 4c is formed. As shown in FIG. 6 (a), the protrusion 8 bites into the inner end of the bottom plate portion c of the groove member 10, and in this state, when the trapezoidal cutting blade 4 moves toward the U-shaped cutting blade 3, the protrusion 8 advances. The front hypotenuse edge 4a cuts the corner portion k1 between the front side plate portion a and the bottom plate portion c of the groove member 10 at a stretch from the front side, and the straight edge 4c of the trapezoidal cutting blade 4 continues. The bottom plate portion c of the groove member 10 is cut by the shearing force generated by the cooperation with the vertical edge 3c while overlapping with the vertical edge 3c of the U-shaped cutting blade 3 in an oblique direction. When the cutting of the trapezoidal cutting edge 4 is finished, the front oblique side edge 4b of the trapezoidal cutting edge 4 becomes a U-shaped cutting edge 3 From the corner portion of the bottom plate portion c and the front side plate portion b of the groove member 10 by the shearing force due to the cooperative action with the side edge 3b while overlapping in the oblique direction with respect to the front side side edge 3b of the front side When cutting to the side plate portion b and the near side oblique side edge 4b of the trapezoidal cutting edge 4 completely overlaps the near side edge 3b of the U-shaped cutting edge 3, the cutting of the groove member 10 is finished.

  Although the cutting operation of the grooved material cutting tool A has been described in detail, in short, according to the grooved material cutting tool A, the first clip rod 1 and the second clip rod 2 are shown in FIG. As shown in a), the grooves fitted into the first pin 1 are simply opened and closed with the two open / close operation grips 5 and 6 once from the open state. The shape member 10 can be easily and easily cut, and the cutting portion does not become uneven or deformed, and can be cut accurately and beautifully.

  In cutting the groove member 10 with the cutting tool A, it is difficult to cut the corner portion k1 between the front side plate portion a and the bottom plate portion c of the groove member 10, so that the trapezoidal cutting blade as described above. The tip end 4o of the linear edge 4c intersecting the front-side oblique side edge 4a of the No. 4 rises in a rounded shape, and the intersection angle portion between the forward-side oblique side edge 4a and the linear edge 4c forms a sharp projection 8 Because of this, immediately before the tip side hypotenuse edge 4a of the trapezoidal cutting edge 4 finishes cutting the tip side plate portion a of the groove member 10, the sharp projection 8 is formed on the inner side of the bottom plate portion c of the groove member 10. It bites into the end portion, so that the corner portion k1 can be easily cut from the near side by one cut.

  Further, regarding the cutting of the corner portion k2 between the bottom plate portion c and the front side plate portion b of the groove shape member 10, unlike the cutting of the corner portion k1 in the initial stage of the cutting step, the front side of the groove shape member 10 The cutting at the final stage after the cutting of the side plate portion a and the bottom plate portion c is completed, and the trapezoidal cutting edge 4 is moved from the bottom plate portion c to the front side plate portion b by the inertial force of the second clip rod 2 being closed. Therefore, the corner k2 can be cut smoothly.

  In the second pin 2 of the grooved material cutting tool A shown in FIGS. 2 to 7, the tip portion 4o of the linear edge 4c intersecting the front side oblique side edge 4a of the trapezoidal cutting edge 4 has a rounded shape. As shown in FIG. 8 (a), the tip end portion 4o of the straight edge 4c is an oblique straight line. An embodiment is shown in which the sharpened protrusion 8 is formed at the intersection angle between the front hypotenuse edge 4a and the straight edge 4c. The sharp projection 8 formed so as to rise in an oblique straight line in this manner is almost the same as the sharp projection 8 formed so as to rise in the above-mentioned round shape, but rises into a round shape. The sharp protrusion 8 formed in this manner can cut the corner portion k1 more smoothly.

  In FIG. 8B, the tip 4o of the linear edge 4c that intersects the front hypotenuse edge 4a of the trapezoidal cutting edge 4 is not raised, but is straight as it is, and is straight with the front hypotenuse edge 4a. An embodiment in which the intersection corner of the edge 4c does not form the sharp protrusion 8 is shown. Thus, even if the sharp protrusion 8 is not formed, the corner portion k2 between the bottom plate portion c and the near side plate portion b of the channel member 10 can be cut.

  1 to 8, the cutting tool A for a groove member has a rear end portion of each of the first clip rod 1 and the second clip rod 2 directly connected to the opening / closing operation grip rods 5 and 6. However, FIGS. 9 and 10 show the groove members in which the rear end portions of the first clip rod 1 and the second clip rod 2 are connected to the opening and closing operation grip rods 5 and 6 via the toggle joint T, respectively. The cutting tool B for use is shown.

  The toggle joint T of the grooved material cutting tool B is composed of a pair of left and right link members 11 and 12, each of which has bifurcated arms 13 and 14 on the upper side. The end portion 13a of the bifurcated arm 13 of the link member 11 and the one end portion 14a of the bifurcated arm 14 of the link member 12 are pivotally connected by a pin 15 and the bifurcated portion of the link member 11 is formed. The other end 13b of the arm 13 is pivotally connected to the rear end of the first pin 1 by a pin 16, and the other end 14b of the bifurcated arm 14 of the link member 12 is the rear end of the second pin 2. The lower ends of the link members 11 and 12 are integrally connected to the upper ends of the opening / closing operation grips 5 and 6, respectively.

  Therefore, when using this cutting tool B for channel members, the gripping rods 5 and 6 are gripped from the state shown in FIG. 9 in which the first and second sandwiching rods 1 and 2 are in the open position. When the two sides are swung in a direction approaching each other, the rear end sides of the two scissors 1 and 2 are opened together via the toggle joint T, and at the same time, the U-shaped cutting blade on the front side of the both scissors 1 and 2 3 and the trapezoidal cutting blade 4 are closed together to perform a cutting operation.

  According to the groove-shaped material cutting tool B provided with such a toggle joint T, the gripping force (grip force) in the opening / closing operation gripping rods 5 and 6 is increased at the pins 16 and 17 of the toggle joint T, and Since it is increased at the U-shaped cutting edge 3 and the trapezoidal cutting edge 4 of both the sandwiching rods 1 and 2 to generate a large shearing force, the cutting work of the groove member 10 can be performed easily.

FIG. 1 is an overall schematic front view of a grooved material cutting tool A according to the present invention. (a) is the enlarged front view which looked at the principal part of the cutting tool A for channel members from the front side of the 2nd pinching rod 2, (b) is the side view seen from the arrow X direction of (a). (a) is the front view of the state which turned over the cutting tool A shown to (a) of FIG. 2, (b) is a side view similar to (b) of FIG. (a) is a front view showing both the pinching rods 1 and 2 in a state where the first and second pinching rods 1 and 2 are in the open position when the groove member is cut, and (b) is a front view of FIG. It is a side view similar to (b). (a) is a front view showing a state in which the sandwiching rods 1 and 2 have started cutting, and (b) is a side view. (a) is a front view showing a state when both sandwiching rods 1 and 2 have finished cutting the front side plate portion a of the channel member 10, and (b) is a side view. (a) is a front view showing a state when both sandwiching rods 1 and 2 have finished cutting the bottom plate portion c of the channel member 10, and (b) is a side view. (a) is a front view showing an embodiment in which the tip portion 4o of the straight edge 4c rises in a slanting straight line to form a sharp projection 8, and (b) is a front slant side edge 4a and a straight edge 4c. It is a front view which shows embodiment which the crossing angle part of has not formed the sharp protrusion 8. FIG. FIG. 7 is a front view showing a cutting tool B for a grooved member provided with a toggle joint T, in a state in which both pinching rods 1 and 2 are in an open position. It is a front view in the state where both the pinching rods 1 and 2 of the cutting tool B for the same groove material are in the closed position.

Explanation of symbols

A, B Groove cutting tool 1 1st pin 2 2nd pin 3 U-shaped cutting edge 3a Front side edge 3b of U-shaped cutting edge Front side edge 3c of U-shaped cutting edge Vertical edge 4 of U-shaped cutting edge 4 Trapezoidal cutting edge 4a Tip side oblique side edge 4b of trapezoidal cutting edge Front side hypotenuse edge 4c of trapezoidal cutting edge Linear edge 4o of trapezoidal cutting edge Tip of straight edge Portions 5 and 6 Opening / closing operation gripping rod 7 Axis 8 Sharp protrusion 10 Groove material a Front side plate portion b of groove shape material Front side plate portion c of groove shape material Bottom plate portion T of groove shape material T Toggle joint

Claims (3)

A cutting tool for cutting a grooved material composed of both side plate parts and a bottom plate part, and having a U-shaped cutting edge formed so as to be fitted from the outer side of the bottom plate part to the grooved material to be cut. A first clip rod provided on the side and a trapezoidal cutting blade facing the U-shaped cutting blade of the first clip rod on the distal end side, and the first clip rod in cooperation with the first clip rod And 2 opening scissors, and opening and closing gripping scissors connected respectively to the rear ends of both scissors scissors,
The first and second scissors are configured so that the U-shaped cutting edge and the trapezoidal cutting edge open and close each other, and when closing, both cutting edges move from the front side cutting edge part to the front side cutting edge part. When closing and opening while overlapping one another, both cutting blades are pivotally attached by a pivot so that they open while sequentially separating from the front side cutting blade part to the front side cutting edge part .
The U-shaped cutting edge of the first pin is composed of a front side edge, a front side edge and a vertical edge connecting both side edges, and the trapezoidal cutting edge of the second pin is Corresponding to the front hypotenuse edge corresponding to the front side edge of the U-shaped cutting edge, the front hypotenuse edge corresponding to the front side edge of the U-shaped cutting edge, and the vertical edge of the U-shaped cutting edge It consists of a straight edge connecting both hypotenuse edges,
Cutting for grooved material where the tip of the straight edge that intersects the tip side hypotenuse edge of the trapezoidal cutting edge rises into a rounded shape or an oblique straight line, and the intersecting corner of both edges forms a sharp projection tool. 2. The channel member cutting tool according to claim 1 , wherein the rear end portions of the first clip rod and the second clip rod are directly connected to an opening / closing gripping rod. The channel member cutting tool according to claim 1 , wherein rear end portions of the first clip rod and the second clip rod are connected to a grip rod for opening / closing operation via a toggle joint.

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