JP2003231017A - Cutting device for support member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting device for a support member capable of cutting the support member arranged in a ceiling part in a stable condition while fixing it at its position and cutting the support member with beautiful cut end without crushing and warping the cut end and having excellent operation property and safety in cutting. <P>SOLUTION: This cutting device 10 for the support member is composed of a pair of handle parts 11, B12 connected turnably by a first turn shaft 13, a pair of cutting members 14 whose terminal parts are turnably connected with second turn shafts 14b, 15b provided in the handle parts 11, B12, respectively, to form into substantially L-shape, respectively, and which are mutually connected through a third turn shaft 16 provided in the vicinity of an L-shaped bent part so as to open and close freely, a pair of shearing members 15, at least a pair of channel parts 18 provided like a substantially rectangular channel in a cutting edge part 14a of a cutting member 14, and a projection cutting part 17 formed on a basic part side of a shearing part 15a of the shearing member 15 on the other side opposing to the cutting member 14. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support member for cutting a support member such as a field rim made of aluminum or metal, which is used as a base member for a ceiling in a ceiling construction of a building, a house, a factory or the like. Cutting tools.

[0002]

2. Description of the Related Art A lightweight ceiling used for a building ceiling or the like has a U-shaped cross section attached to the lower surface of a field rim receiver 51 suspended from a skeleton by a hanging bolt 50 as shown in FIG. 10, for example. A structure in which the ceiling finishing material 53 is supported by using a supporting member such as the formed edge 52 is often used. When a lighting fixture, an air conditioning outlet, etc. are provided on the ceiling, holes are made in the ceiling finishing material 53, and
It is necessary to cut the support members such as the field edge 52 and the field edge receiver 51. Therefore, conventionally, a method of cutting the support member using a hand saw or an electric cutter has been performed. However, since it requires labor and lacks workability, various studies have been made to improve this. For example, utility model registration No. 3017
Japanese Patent No. 159 (hereinafter referred to as "A") has a V-shaped cross section extending in the thickness direction of the cutting blade at two positions above and below one of the pair of cutting blades provided at the upper end of the handle. There is described a field edge cutting tool provided with a concave groove having.

[0003]

However, the above conventional techniques have the following problems. (1) When the support member is cut using a hand saw, there is a problem in that the operation is unstable, time is required, and workability is poor. (2) When an electric cutter is used, there are problems such as sparks and dust scattering around, discoloring the finishing material and the risk of fire. (3) In the method of using the field edge cutting tool described in Japanese Patent Publication (A) No. Gazette, a supporting member having a substantially U-shaped cross section is fitted into the groove of one cutting blade, and the other cutting blade is inserted. When pressing and cutting, there is a problem that the starting point that triggers the cutting is not determined, so that the cut end is likely to be crushed or distorted, resulting in poor appearance. (4) Further, since the starting point of cutting becomes slippery and unstable, it is difficult to perform precise positioning and cutting, and there is a problem that workability is poor. (5) Further, since the direction of the cutting blade at the time of cutting and the direction of the handle of the handle at that time are substantially the same, when cutting a field edge in which the U-shaped opening direction is the vertical direction, There is a problem in that the handle has to be extended in the horizontal direction, and the handle portion interferes with the ceiling member or the like, resulting in poor usability.

The present invention solves the above-mentioned problems of the prior art by simply and surely shortening in a stable state the support member for the field edge or field edge receiver arranged on the ceiling or the like is fixed at that position. An object of the present invention is to provide a support member cutting tool that can be cut in a time period, has excellent operability and safety in cutting, and can cut a support member with a beautiful cut edge without being crushed or distorted.

[0005]

In order to solve the above conventional problems, the present invention has the following constitution. The support member cutting tool according to claim 1 is a pair of handle portions A and B that are rotatably connected by a first rotation shaft, and a second handle portion that is provided on each of the handle portions A and B. A cutting member and a shearing member whose base ends are rotatably connected to the rotary shaft and openably and closably connected to each other via a third rotary shaft, and abut on the shearing part of the shearing member so as to face each other. The blade of the cutting member is provided with a protrusion cutting portion formed in a convex shape, a concave shape, or a bent shape. With this configuration, the following effects can be obtained. (A) By opening and closing a pair of handle parts A and B that are rotatably connected by a first rotating shaft, the base end parts of the handle parts A and B rotate about a second rotating shaft. It is possible to cut the cutting member, which is freely connected and connected via the third rotation shaft, and the support member arranged between the shearing portions of the shearing member. At this time, the corners of the support member are engaged with projection cutting portions formed in a convex shape, a concave shape, or a bent shape, and the shearing force can be concentrated from this point as a starting point to perform cutting while opening, facilitating the cutting work. At the same time, the cut can be made beautiful. (B) The projection cut portion can be surely held by being bitten into a corner portion such as a field edge or a field edge receiver, and the support member can be reliably positioned without being displaced in the middle, Excellent workability. (C) Since the cutting member and the shearing member can be formed in a substantially L shape, it is possible to cut while the supporting member that is horizontally extended and arranged on the ceiling or the like is fixed at that position.

Here, the cutting member and the shearing member are each formed in a generally L-shape or curved shape, and one end side of each of the cutting member and the shearing member connects the handle portions A and B to each other. It is a metal member that is rotatably fixed to a second rotation shaft provided on the rotation shaft side and has a hardened blade portion on the tip side. The lengths of the handle portions A and B are preferably 3 to 15 times, preferably 4 to 10 times the total length of the cutting member or the shearing member. This depends on the material of the supporting member to be cut and the positional relationship of the supporting members on the ceiling portion, but the supporting member is cut as the length of the handle portion becomes smaller than four times the total length of the cutting member. The work force tends to decrease due to an increase in the force necessary for the operation. On the contrary, as it exceeds 10 times, the opening width of the grip portion at the end of the handle portion becomes too large, which makes it inconvenient to handle or opened. Occasionally, the workability tends to be deteriorated by interfering with surrounding ceiling members, and these tendencies are less than 3 times or more than 15 times, and more prominent, which is not preferable.

The projection cutting portion can be easily cut open by allowing the projection portion to first pierce a supporting member such as a field edge and using this as a cutting edge to easily insert the blade portion into the supporting member. When the projection cutting portion is formed in a substantially V-shaped concave shape, the opening angle of the opening is preferably set in the range of 45 degrees to 120 degrees. If the opening angle is less than 45 degrees, the cut end is small and the field edge tends to be pushed and bent, which tends to cause distortion or deformation at the time of cutting. It is not preferable because it has a weak break-through and tends to be deformed (tilted) at the time of cutting by pressing a field edge or the like. When the projection cutting portion is formed in a sharp shape, the sharp angle is preferably set in the range of 45 degrees to 100 degrees. If this angle is less than 45 degrees, the protrusion cut portion tends to have insufficient durability,
On the other hand, if it exceeds 100 degrees, biting becomes less and operability tends to deteriorate, which is not preferable.

According to a second aspect of the present invention, in the cutting tool for a supporting member according to the first aspect, the shearing portion of the shearing member is provided with at least a pair of groove portions formed in a substantially rectangular groove shape. There is. With this configuration, in addition to the operation of claim 1, the following operation can be obtained. (A) The supporting member can be fixed between the shearing portions of the shearing member via the groove portion, and the projection cutting portion is engaged with the corner portion of the supporting member, and the cut cutting is easily deformed starting from this point. It can be done without any work, and can be easily cut and has excellent operability. Here, the opening of the groove portion is arranged in the shape of a groove at a right angle to the shear plane of the shearing member, and is formed according to the width of the tip of the supporting member such as a field edge or a field edge receiver formed in a substantially U shape. To be done. The spacing between the pair of grooves is set according to the spacing of the opening of the field edge that is formed in a generally U-shaped configuration to be applied. Can be adapted.

A support member cutting tool according to a third aspect of the present invention is the support member cutting tool according to the first or second aspect of the present invention, wherein the cutting member and the shearing member are each formed in a substantially L shape, and the L shape is bent. It is configured to be openably and closably connected to each other via the third rotation shaft provided near the portion. With this configuration, in addition to the operation of claim 1 or 2, the following operation can be obtained. (A) Since the cutting member and the shearing member are formed in a substantially L shape, the cutting member and the supporting member such as a field edge horizontally extended on the ceiling portion and the like can be easily cut while being fixed at that position. It is possible and excellent in operability in the cutting work of the supporting member. (B) Since the total length can be shortened, it can be compactly stored in a tool box or the like and is excellent in portability and handleability.

A cutting member for a supporting member according to a fourth aspect is the cutting tool for a supporting member according to any one of the first to third aspects,
In the opened state of the cutting member and the shearing member, the length direction of the handle portion B and the direction of the shearing portion of the shearing member are formed substantially at right angles. With this configuration, the following actions can be obtained in addition to the actions according to any one of claims 1 to 3. (A) In the open state of the shearing portion, since the length direction of the handle portion B and the direction of the shearing portion of the shearing member are substantially perpendicular to each other, support for a field edge or the like that is extended in the horizontal direction of the ceiling portion. The shearing part formed on the tip of the support member cutting tool can be inserted into the member from the lower side, and the shearing part can be easily fitted into the groove for operation, whereby cutting work such as a field edge in the ceiling part can be performed. It can be done efficiently. (B) Positioning can be easily performed from the lower side of the ceiling, there are few failures, and anyone can easily cut the support member, which is excellent in workability. (C) While holding the handle portion B in the vertical direction, the blade portion can be moved by opening and closing the other handle portion A, so that interference with the ceiling plate arranged on the ceiling portion and other fields is prevented. The number can be minimized, and the support member can be cut efficiently.

A support member cutting tool according to a fifth aspect is the cutting tool for a support member according to any one of the first to fourth aspects,
In the closed state of the cutting member and the shearing member, the length direction of the handle portions A and B and the direction of the cutting member and the blade portion and the shearing portion of the shearing member are formed substantially at right angles. . With this configuration, the following actions can be obtained in addition to the actions according to any one of claims 1 to 4. (A) In the closed state of the blade portion, since the length directions of the handle portions A and B and the blade portions of the cutting member and the shearing member are formed substantially at right angles, they are arranged on the ceiling side. The cutting tool for a support member can be easily operated by operating the cutting tool for a support member from the lower side of the support member such as a field edge directly below, and the cutting workability can be further improved. (B) Since the cutting member for a support member can be held vertically at the end of cutting a field edge or the like, it is possible to accurately perform positioning and the like in a comfortable posture, and it is also excellent in safety during work.

The cutting tool for a support member according to a sixth aspect is the cutting tool for a support member according to the first aspect or the second aspect, in the opened state of the cutting member and the shearing member, the longitudinal direction of the handle portion B and the shearing force. It is formed by forming a substantially straight line with the direction of the shearing portion of the member. With this configuration, in addition to the operation of claim 1 or 2, the following operation can be obtained. (A) Since the length direction of the handle portion B and the direction of the blade portion of the shearing member are substantially in a straight line when the blade portion and the shearing portion are in the open state, they extend horizontally in the ceiling portion. Then, insert the blade portion formed at the tip of the support member cutting tool from the lower side into the support member such as the field rim receiver that is opened laterally, and easily fit into this groove for operation. As a result, the cutting work such as the field rim receiver on the ceiling can be efficiently performed. (B) Positioning can be easily performed from the lower side of the ceiling, there are few failures, and anyone can easily cut the support member, which is excellent in workability. (C) While holding the handle portion B in the vertical direction, the blade portion can be moved by opening and closing the other handle portion A, so that interference with the ceiling plate arranged on the ceiling portion and other fields is prevented. The number can be minimized, and the support member can be cut efficiently.

A cutting member for a supporting member according to a seventh aspect is the cutting tool for a supporting member according to any one of the first to sixth aspects,
A plurality of groove portions are provided in the shearing portion of the shearing member, and the intervals between the groove portions are set according to the size of a supporting member such as a cutting edge or a cutting edge receiver to be cut. With this configuration,
In addition to the effect of any one of claims 1 to 6, the following effect is obtained. (A) Since a plurality of groove portions are provided in the shearing portion, either of them can be applied according to the width of a double bar or a single bar having a U-shaped opening width and the like different from each other. In this way, it is possible to efficiently perform the work of cutting the support member in the ceiling base member or the like constructed by combining different standards.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A cutting member for a support member according to an embodiment of the present invention will be described. (Embodiment 1) FIG. 1 is a front view of a cutting tool for a supporting member according to Embodiment 1 in a state in which a handle is closed, FIG. 2 is an explanatory view of a state in which the handle is opened, and FIG. It is a principal part front view of a blade part, FIG. 4 is a principal part front view of the shearing part, and FIG. 5 is a principal part front view showing its usage state. 1 to 5, 10 is a cutting member for a supporting member according to the first embodiment, 11,
Reference numeral 12 is a pair of left and right handle portions provided with the handle portions 11a and 12a, 13 is a first rotating shaft that connects the handle portion 11a and the handle portion 12a, and 14 and 15 are curved or bent in a generally L-shape. And a cutting member having a blade portion 14a and a shearing portion 15a on the tip side thereof, each base portion being rotatably fixed to the handle portion 11 and the handle portion 12 via the second rotating shafts 14b and 15b. A shearing member, 16 is a third rotation shaft that rotatably connects the cutting member 14 and the shearing member 15, and 17 is a protrusion formed in an inverted V shape on the base side of the blade portion 14a of the cutting member 14. The cutting portions 18a to 18c have an opening width of 1 to 3 m formed at predetermined intervals in the shearing portion 15a of the shearing member 15.
m, a groove having a substantially rectangular shape with a depth of 5 to 20 mm, 19 is a gripping portion made of rubber or synthetic resin provided on the base end sides of the handle portions 11a and 12a, and 20 is hung from the ceiling portion in the horizontal direction. Is formed so as to extend in a rectangular shape and has a substantially U-shaped cross section and is made of a metal such as aluminum or a synthetic resin, α is formed at a bending angle of the cutting member 14 of about 90 °, and β is The protrusion angle of the protrusion cutting portion 17 is 45 ° <β <120 °. γ is a bending angle of the shearing member 15 formed in a substantially L shape, and is formed at 80 ° to 95 °, preferably about 90 °. As shown in FIG. 4, the length from the end portion 18a ′ of the groove portion 18a to the end portion 18c ″ of the groove portion 18c is about 50 mm, and the end portion 18a ′ of the groove portion 18a to the end portion 18b ″ of the groove portion 18b.
Since the length up to about 25 mm and the depth of the groove portions 18a to 18c are formed to 19 to 25 mm, the field edge can be securely fitted and fixed between the groove portions, and the cutting portion shakes during the cutting work and the cutting portion may be shaken. It can be prevented from slipping.

As shown in FIG. 1, the cutting member 10 for the support member has the handle member 11 and the handle member 12 in the directions of the blade portion 14a and the shearing portion 15a when the cutting member 14 and the shearing member 15 are closed. When the cutting member 14 and the shearing member 15 are formed to be substantially perpendicular to the directions of 11a and 12a and the handle portion 11 is opened at the opening angle θ as shown in FIGS. The direction of the shearing portion 15a of the member 15 and the direction of the handle portion 12a of the handle portion 12 are arranged at a substantially right angle. As shown in FIG. 4, the shearing member 15 has a bending angle γ of 75 ° <γ <9 as a whole.
It is formed in an L-shape at 5 °, preferably about 90 °, and can be rotated through a rotating shaft 16 provided in the bent portion, and the shearing portion 15a has a rotating shaft 16 side and a cutting edge 15a ′ in order. The groove portions 18a to 18c are arranged according to the width of the field edge 20. The field edge 20 is formed by bending an open front end of its substantially U-shaped cross section at a right angle with a predetermined width, and a locking tool such as a W clip or an S clip is engaged with this L-shaped portion. ,
It is connected to a field rim receiver which is horizontally extended above it via a locking tool. A ceiling plate material such as a non-combustible board is attached to the flat portion on the back surface side of the field edge 20 via a tacker pin, a rivet or the like.

Next, a method of using the cutting member 10 for a supporting member configured as described above will be described. First, as shown in FIG. 3, the cutting member 14 and the shearing member 15 are inserted from the openings provided in the ceiling finishing material and the both ends of the field edge 20 which are opened in a substantially U-shape and folded back. , Its groove 18a,
18c is fitted. The cutting member 14 and the shearing member 15
In the open state, the handle portion 12a of the handle portion 12 is held in a substantially vertical direction, the opening angle θ with the handle portion 11 can be operated within a range of about 60 degrees to 110 degrees, and the interference with the ceiling portion is prevented. The cutting work can be carried out efficiently with minimum control. Then, as shown in FIG. 3, with the handle portion 12 maintained in a substantially vertical direction,
The opening angle θ between and is narrowed, and the bent portion 17a bent in the V-shape on the base end side of the projection cutting portion 17 formed on the blade portion 14a of the cutting member 14 is provided at one corner portion 20a of the field edge 20. Abut and perform necessary positioning. After this positioning, the opening angle θ is further narrowed and the bent portion 17a formed by expanding at the angle β is used as a starting point, and the side portion 20b and the side portion 2 of the field edge 20 are formed.
It is possible to cut and cut both 0c at a time by the cutting edge portion 17b of the projection cutting portion 17 at one time. As shown in Fig. 2, the protrusion cutting portion 17 rotates in the locus of the arrow X toward the tip 18a "of the groove 18a. This prevents the corner portion of the field edge from being depressed and prevents the appearance from being deteriorated. At the same time, shearing is applied to the angle, so that the angle can be easily cut. It is preferable that the angle β is in the range of 90 to 120 degrees, and when the angle is smaller than 90 degrees, the side portion 20c gets deeper. There is a tendency for the cut to become distorted, and conversely 12
If it exceeds 0 degrees, the biting becomes shallow and the reliability of positioning tends to deteriorate, which is not preferable. In the closed state at the end of cutting, since the handle portions 11a and 12a of the handle portion 11 and the handle portion 12 are in substantially vertical directions, it is easy to confirm the end of cutting, and the work is continued in a comfortable posture. be able to.

Since the cutting member 10 for a support member of the first embodiment is configured as described above, it has the following effects. (A) A pair of handle portions 11, 1 rotatably connected
By opening and closing 2 and operating the opening angle θ, the groove portion 18 is provided between the blade portion and the shearing portion of the cutting member 14 and the shearing member 15.
The fixedly arranged field edge 20 can be cut via the. At this time, the projection cutting portion 17 is attached to the corner portion 20a of the field edge 20.
After the stress is concentrated in a point shape from the sharp bent portion 17a as the starting point to set the cutting base point, the cutting edge portion 17b is linearly contacted with the side portion 20c of the field edge 20 to cut the cutting force. It can be pushed open while being dispersed, and can be cut to facilitate the cutting work and make the cut end beautiful. (B) In the opened state of the blade portion 14a and the shearing portion 15a, since the length direction of the handle portion 12a of the handle portion 12 and the direction of the shearing portion 15a of the shearing member 15 are substantially perpendicular to each other, the ceiling portion is horizontal. Inserting the shearing portion 15a formed at the front end of the supporting member cutting tool 10 from the upper side into the field edge 20 extending in the direction of the arrow and easily fitting the shearing portion 15a into the groove portion 18 Therefore, the cutting work of the field edge 20 and the like on the ceiling can be quickly performed. (C) The handle portions 11 and 12 of the handle portion 11 and the handle portion 12 in the closed state of the blade portion 14a and the shearing portion 15a.
14 of the cutting member 14 and the shearing member 15
Since a and the shearing portion 15a are formed so as to be substantially perpendicular to each other, the support member cutting tool 10 can be operated from below the support member such as the field edge 20 arranged on the ceiling side. Can be easily cut, and the cutting workability can be further improved. (D) Since the plurality of groove portions 18 are provided in the shearing portion 15a, either of them can be applied according to the width of the field edge 20 such as a double bar or a single bar having a U-shaped opening width and the like different from each other. In this way, it is possible to efficiently perform the cutting work on the ceiling base member constructed by combining different standards. (E) Since the supporting member cutting tool 10 can be held vertically,
Positioning etc. can be performed accurately in a comfortable posture, and it is also excellent in safety during work. (F) Positioning can be easily performed from the lower side of the ceiling, there are few failures, and anyone can easily cut the field edge, which is excellent in workability. (G) Since the protrusion cutting portion 17 is provided on the base side of the blade portion 14a of the cutting member 14, the supporting member such as the field edge 20 does not shift halfway after the start of cutting, and the positioning can be performed reliably. It has excellent workability. (H) Since the cutting member 14 and the shearing member 15 are formed in a substantially L shape, it is possible to easily cut the field edge 20 that is horizontally extended on the ceiling or the like and fixed at that position. . (I) While holding the handle portion 11 in the vertical direction, the blade portion can be moved by opening and closing the other handle portion 12, which prevents interference with the ceiling plate arranged on the ceiling portion or other field edges. It can be cut to the minimum and can cut the field efficiently.

(Embodiment 2) FIG. 6 is a front view of a main portion of a shearing member side showing a use state of a cutting member for a support member according to Embodiment 2. In FIG. 6, 21 is a cutting member for a support member of the second embodiment, 22 is a protruding blade portion 23 and a protruding blade portion formed by protruding in a reverse V shape from the base side of the blade portion 14a of the cutting member 14. 23 from the side to the tip side by the side portion 24a and the angle δ
And a V-shaped blade portion 24 that is formed by notching in a V-shape by expanding to the side portion 24b. In the closed state of the cutting member 14 and the shearing member 15 of the support member cutting tool 21, the tip 23a of the protruding blade portion 23 has the groove portion 18a.
At the corner portion 18a 'of the base side which is opened, and the V-shaped blade portion 2
The open end portions (bent portions) of No. 4 are arranged so as to contact the corner portions 18a ″ on the other end side of the groove portions 18a, respectively.
Here, the protruding blade portion 23 is 1 to 1 from the blade surface of the blade portion 14a.
It is preferable to project in a range of about 10 mm, and it is preferable that the angle δ of the V-shaped blade portion 24 provided in series with the protruding blade portion 23 is in the range of 60 to 90 degrees. This can enhance the bite-cutting effect. Protruding blade 2
When the protruding height of 3 is less than 1 mm, the corner 2 of the field edge 20
There is a tendency that it becomes difficult to reliably capture 0a, and conversely 1
If it exceeds 0 mm, the biting will become too deep and the field edge 20
This is not preferable because the cut surface of the item (1) tends to be distorted. If the angle δ is less than 60 degrees, the degree of stress concentration becomes too strong and it is easy to deform. If it exceeds 90 degrees, the field edge 2
It is not preferable because the side portion 24b of the protrusion cutting portion 22 is bitten into the zero side portion 20c at a small angle, resulting in lack of certainty. It should be noted that the components having the same functions as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The support member cutting tool 21 according to the second embodiment differs from that according to the first embodiment in that the projection cutting portion 22 includes the projection blade portion 23 and the V-shaped blade portion 24. When cutting a support member such as a field edge, the tip end 23a of the protruding blade portion 23 is bitten into the corner portion 20a of the field edge 20 which is disposed by fitting one end portion into the groove portion 18a at the start of rupture. Hold it securely,
It is possible to cut neatly without distorting the cut portion while sequentially tearing by the side portion 24b of the V-shaped blade portion 24. Thus, the projection cutting portion 22 is formed on the corner portion 20a of the field edge 20.
It is possible to surely fit the blades to each other, and to cut while opening, so that the cutting work can be easily performed, the work safety is ensured, and the cut end can be finished neatly.

(Third Embodiment) FIG. 7 is a front view of a cutting tool for a supporting member according to a third embodiment with a handle closed.
Is an explanatory view of a cutting state of a field edge, and FIG. 9 is a front view of a main part showing a usage state thereof. 7 to 9, 30 is a cutting member for a supporting member according to the third embodiment, and 34 and 35 are blades which are curved in a substantially spiral shape around the rotating shaft 13 and are opposed to the inner side on the tip side thereof. The base portion 14a and the shearing portion 15a are provided, and the base portions of the handle portions 11a and 11b are disposed via the rotating shafts 14b and 15b.
And a cutting member and a shearing member rotatably fixed to the handle portion 12, 37 a projection cutting portion formed by projecting sharply on the base side of the blade portion 14a of the cutting member 34, and 38 a cutting edge portion of the cutting member 14 Projection cutting part formed in a bent shape in 3
9, 39a are substantially rectangular groove portions similar to the groove portions 18a, 18c of the first embodiment formed on the base side of the shearing portion 15a of the shearing member 35, and 40 is suspended from the ceiling portion and extends horizontally. It is a field frame receiver that is arranged and has a substantially U-shaped cross section and is made of metal such as aluminum or synthetic resin. The cutting member 30 for a support member according to the third embodiment includes the shape of the cutting member, the shearing member, and the projection cutting member, and the positional relationship between the blade portion and the handle portion in the open state and the closed state. It differs from the cutting member 10 for a support member of the first embodiment. It should be noted that the components having the same functions as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 8, the projection cutting portion 37 provided on the base side of the blade portion 14a protrudes at an acute angle between the side portion 37a on the base side and the side portion 37b on the front side, and the angle Φ of the tip thereof is 30. It is formed at 120 degrees. In the closed state of the support member cutting tool 30, the corner formed by the side portion 40a and the side portion 40b of the field edge receiver 40 fitted in the groove portion 39 of the other shearing portion 15a and the side portion 40a. The side portion 37a having the cutting edge of the protrusion cutting portion 37 is arranged so as to come into contact first. As a result, stress is concentrated when the cutting edge is bitten into the side portions 40a and the side portions 40b of the field edge receiver 40, and the first opened portion can be cut surely and smoothly. The interval between the corner 39 'of the groove 39 and the corner 39a' of the groove 39a and the opening width of each groove are arranged in accordance with the standard of the field rim receiver 40 to be applied, and if necessary, three or more grooves are provided. It may be arranged. In the protruding cutting portion 38 provided on the tip side of the blade portion 14a, the side portion 38b extended from the side portion of the blade portion 14a has the groove portion 39a of the shearing portion 15a.
Is formed by bending toward the side portion 38a at an angle ξ at a position corresponding to the corner portion 39a ′ of the angle 39a ′, and the angle ξ is in the range of 100 to 150 degrees. When the angle ξ is smaller than 100 degrees and is shallow, the projecting shearing portion 38 cannot effectively escape the stress after being bitten into the corner portion 40d on the cutting edge side of the field edge receiver 40 and further opening, and the cutting edge However, if the angle exceeds 150 degrees, the certainty at the time of biting into the corner 40d tends to decrease, which is not preferable.

As shown in FIG. 7, the support member cutting tool 30 has the cutting member 34 and the shearing member 35 in the closed state, the direction of the blade portions 14a and 15a, the handle portion 11 and the handle portion 11a of the handle portion 12. , 12a are formed so as to form a substantially straight line, and shearing is performed in the open state of the cutting member 34 and the shearing member 35 in which the handle portion 11 is opened at the opening angle θ as shown in FIGS. 8 and 9. The blade edge direction of the member 35 and the handle portion 12a of the handle portion 12 are arranged in a straight line.

Next, a method of using the supporting member cutting tool 30 of the third embodiment configured as described above will be described. First, as shown in FIG. 7, the cutting member 34 and the tip of the shearing member 35 are inserted from the opening provided in the ceiling finishing material and the like, and the tip of the cutting edge 34 is opened in a substantially U-shape so that the tip is inward. The folded back tip portion 40e is fitted into the groove portions 39 and 39a. In the opened state of the cutting member 34 and the shearing member 35, the handle portion 12a of the handle portion 12 is held in a substantially vertical direction, and the opening angle θ with the handle portion 11 is about 6.
It can be operated in the range of 0 to 90 degrees. Then,
While maintaining the handle portion 12 in a substantially vertical direction, the opening angle θ with the handle portion 11 is narrowed, and the blade portion 1 of the cutting member 34 is
The projection cutting portion 37 formed on 4a is brought into contact with the corner portion 40c on the base end side of the field edge receiver 40 to perform necessary positioning. After this positioning is performed, the opening angle θ is further narrowed and the side portion 40 of the field edge receiver 40 starts from the tip of the protrusion cutting portion 37.
While cutting open the corner 40c formed by a and the side 40b, the cutting portion 38 on the cutting edge side can be cut by bringing it into contact with the next corner 40d of the field receiver 40 fitted in the groove 39a. it can.

Since the cutting member 30 for a support member of the third embodiment is configured as described above, it has the following effects. (A) The field rim receiver 40 is fixed through the grooves 39, 39a, and the corners of the field rim receiver 40 are cut while pressing and opening the sharp convex or bent portions of the projection cutting portions 37, 38 as starting points. This makes it easy to cut and makes the cut end beautiful. (B) Since the projection cutting portion 37 has the projection cutting portion 38 on the base side of the blade portion 14a and the projection cutting portion 38 on the cutting edge side, the support member such as the field edge receiver 40 shifts after the start of cutting or near the end of cutting. There is no problem, positioning can be performed reliably, and workability is excellent. (C) The handle portion 12 of the handle portion 12 in the open state
Since the lengthwise direction of a and the direction of the shearing portion 15a of the shearing member 35 are arranged in a substantially straight line, the field rim receiver 40 that is arranged to extend horizontally in the ceiling portion is provided below It is possible to insert the shearing portion 15a formed at the tip of the supporting member cutting tool 30 from the side and easily fit the groove portions 39, 39a in the horizontal direction, and the field edge receiver 40 or the like in the ceiling portion. The cutting work can be efficiently performed. (D) In the closed state, the handle members 11 and 12 have handle portions 11a and 12a in the longitudinal direction and the cutting member 3.
4 and the direction of the blade portions 14a, 15a of the shearing member 35 are formed so as to be substantially in line with each other, so that they are supported from below the support member such as the field rim receiver 40 arranged on the ceiling side. It can be easily cut by operating the member cutting tool 30.

[0023]

According to the cutting member for a support member described in claim 1, the following effects can be obtained. (A) By opening and closing a pair of handle parts A and B that are rotatably connected by a first rotating shaft, the base end parts of the handle parts A and B rotate about a second rotating shaft. It is possible to cut the support member arranged between the cutting member and the blade portion of the shearing member that are freely connected and connected via the third rotation shaft. At this time, the corners of the supporting member are engaged with the protruding cutting portions formed in a convex shape, a concave shape, or a bent shape, and from this point, the force can be concentrated and the cutting can be performed while cutting open, facilitating the cutting work. , The cut can be beautiful. (B) The projection cut portion can be surely held by being bitten into a corner portion such as a field edge or a field edge receiver, and the support member can be reliably positioned without being displaced in the middle, Excellent workability. (C) Since the cutting member and the shearing member can be formed in a substantially L shape, it is possible to cut while the supporting member that is horizontally extended and arranged on the ceiling or the like is fixed at that position.

According to the cutting member for a support member described in claim 2, in addition to the effect of claim 1, the following effect can be obtained. (A) The supporting member can be fixed between the blades of the cutting member and the shearing member via the groove, and the protrusion cutting portion can be engaged with the corner of the supporting member to cut from the starting point. It is easy to operate and has excellent operability.

According to the cutting member for a support member described in claim 3, the following effects can be obtained in addition to the effects of claim 1 or 2. (A) Since the cutting member and the shearing member are formed in a substantially L-shape, the supporting member arranged to extend in the horizontal direction on the ceiling portion or the like can be easily cut while being fixed at that position. Has excellent operability in cutting work. (B) Since the total length can be shortened, it can be compactly stored in a tool box or the like and is excellent in portability and handleability.

According to the cutting member for a support member described in claim 4, in addition to the effects of any one of claims 1 to 3, the following effects can be obtained. (A) Since the length direction of the handle portion B and the direction of the blade portion of the shearing member are substantially perpendicular to each other in the opened state of the blade portion, they are arranged so as to extend horizontally in the ceiling portion. The blade formed on the tip of the support member cutting tool can be inserted into the supporting member such as the field edge from the lower side, and the blade can be easily fitted into the groove for operation. The cutting work can be efficiently performed. (B) Positioning can be easily performed from the lower side of the ceiling, there are few failures, and anyone can easily cut the support member, which is excellent in workability. (C) While holding the handle portion A in the vertical direction, the blade portion can be moved by opening and closing the other handle portion B, so that interference with the ceiling plate arranged on the ceiling portion or other fields is prevented. The number can be minimized, and the support member can be cut efficiently.

According to the cutting member for a support member described in claim 5, the following effects can be obtained in addition to the effect of any one of claims 1 to 4. (A) In the closed state of the blade portion, since the length directions of the handle portions A and B and the blade portions of the cutting member and the shearing member are formed substantially at right angles, they are arranged on the ceiling side. The cutting tool for a support member can be easily operated by operating the cutting tool for a support member from the lower side of the support member such as a field edge directly below, and the cutting workability can be further improved. (B) Since the cutting member for a support member can be held vertically at the end of cutting a field edge or the like, it is possible to accurately perform positioning and the like in a comfortable posture, and it is also excellent in safety during work.

According to the cutting member for a support member described in claim 6, the following effects can be obtained in addition to the effects of claim 1 or 2. (A) Since the length direction of the handle portion B and the direction of the blade portion of the shearing member are substantially in a straight line when the blade portion is in the open state, the ceiling portion extends horizontally in the horizontal direction. Insert the blade part formed at the tip of the support member cutting tool from the lower side into the support member such as the field receiver arranged by opening,
The groove portion can be easily fitted and operated, and the cutting work such as the field edge receiver in the ceiling portion can be efficiently performed. (B) Positioning can be easily performed from the lower side of the ceiling, there are few failures, and anyone can easily cut the support member, which is excellent in workability. (C) While holding the handle portion A in the vertical direction, the blade portion can be moved by opening and closing the other handle portion B, so that interference with the ceiling plate arranged on the ceiling portion or other fields is prevented. The number can be minimized, and the support member can be cut efficiently. (D) In the closed state of the blade portion, it is possible to easily cut by operating the support member cutting tool from below the support member such as the field edge receiver arranged on the ceiling side directly below the support member. Can be improved.

According to the cutting member for a support member described in claim 7, the following effects can be obtained in addition to the effect of any one of claims 1 to 6. (A) Since a plurality of groove portions are provided in the blade portion, either of them can be applied according to the width of a double bar or a single bar having a U-shaped opening width and the like different from each other. In this way, it is possible to efficiently perform the work of cutting the support member in the ceiling base member or the like constructed by combining different standards.

[Brief description of drawings]

FIG. 1 is a front view of a cutting tool for a supporting member according to a first embodiment with a handle closed.

FIG. 2 is an explanatory view showing a state in which a handle of the cutting member for a supporting member according to the first embodiment is opened.

FIG. 3 is a front view of a main part of a blade portion of the cutting member for a support member according to the first embodiment.

FIG. 4 is a front view of a main part of a shearing member of the cutting member for a supporting member according to the first embodiment.

FIG. 5 is a front view of relevant parts showing a usage state of the cutting member for a supporting member according to the first embodiment.

FIG. 6 is a front view of a main part of a shearing member showing a usage state of a cutting member for a supporting member according to a second embodiment.

FIG. 7 is a front view of the cutting member for a support member according to the third embodiment with the handle closed.

FIG. 8 is an explanatory view of a cutting state of a field edge of the cutting member for a support member according to the third embodiment.

FIG. 9 is a front view of essential parts showing a usage state of the cutting member for a supporting member according to the third embodiment.

[Figure 10] Construction explanatory drawing of the ceiling part

[Explanation of symbols]

10 Cutting Tool for Support Member of First Embodiment 11 Handle 11a handle 12 Handle 12a handle 13 First rotation axis 14 Cutting member 14a blade 14b Second rotation shaft 15 Shearing member 15a shearing part 15a 'cutting edge 15b Second rotation shaft 16 Third rotation axis 17 Protrusion cutting part 17a Bent part 17b Blade part 18a-18c groove 18a 'corner 18a "corner 19 grip 20 Noen 20a corner 20b side 20c side 21 Cutting Tool for Support Member of Second Embodiment 22 Uneven cut section 23 Protruding blade 23a tip 24 V-shaped blade 24a side 24b side 30 Cutting Tool for Support Member of Third Embodiment 34 Cutting member 35 shearing member 37 Projection cutting part 37a side 37b side 38 Projection cutting part 38a side 38b side 39 Groove 39a groove 39 'corner 39a 'corner 40 Field Engagement 40a side 40b side 40c corner 40d corner 40e tip 50 hanging bolt 51 Field Engage 52 Noen 53 Ceiling finishing materials

Claims (7)

[Claims] 1. A pair of handle portions A and B rotatably connected by a first rotation shaft, and a second rotation shaft provided on each of the handle portions A and B, and a base end portion thereof. A cutting member and a shearing member that are rotatably connected to each other and are openably and closably connected to each other via a third rotation shaft, and a blade portion of the cutting member that faces and abuts against the shearing portion of the shearing member. A cutting tool for a support member, comprising: a protrusion cutting portion formed in a shape, a concave shape, or a bent shape. 2. The cutting member for a support member according to claim 1, wherein the shearing portion of the shearing member is provided with at least a pair of groove portions formed in a substantially rectangular groove shape. 3. The cutting member and the shearing member are each formed in a substantially L shape, and are openably and closably connected to each other via the third rotation shaft provided in the vicinity of the L-shaped bent portion. The cutting tool for a support member according to claim 1 or 2, wherein the cutting tool is for a support member. 4. The lengthwise direction of the handle portion B and the direction of the shearing portion of the shearing member are formed substantially at right angles in the opened state of the cutting member and the shearing member. The cutting tool for a support member according to any one of 1 to 3. 5. In the closed state of the cutting member and the shearing member, the lengthwise direction of the handle portions A and B and the direction of the shearing portion of the cutting member and the shearing member are formed substantially at right angles. The cutting tool for a support member according to any one of claims 1 to 4. 6. The length direction of the handle portion B and the direction of the shearing portion of the shearing member are formed in a substantially straight line in the opened state of the cutting member and the shearing member. Item 3. A cutting tool for a support member according to Item 1 or 2. 7. The shearing portion of the shearing member is provided with a plurality of grooves, and the intervals between the grooves are set in accordance with the width of the opening of the supporting member such as the field edge or the field edge receiver to be cut. The cutting tool for a support member according to any one of claims 1 to 6, which is characterized.