JP6847423B2 - Cutting tool fixture - Google Patents

Description

The present invention relates to a cutting tool fixture.

When constructing a building consisting of multiple floors such as a building, cables such as trunk cables are laid between the floors, so it is necessary to form a rectangular through hole in the floor slab at the corresponding location on each floor. .. Specifically, a rectangular metal formwork (sleeve) formed in a tubular shape is fixed to a metal deck plate for a floor slab. At this time, the formwork is installed so that one opening faces upward and the other opening is closed by the deck plate. Next, concrete is placed on the deck plate around the formwork. Then, using a cutting tool, the deck plate portion exposed through the opening of the formwork is cut along the inner peripheral edge of the formwork to form a through hole corresponding to the opening of the formwork. ..

To cut the deck plate, a cutting tool equipped with a saw blade is used instead of gas cutting to avoid the risk of fire. Further, as described above, since it is necessary to cut the deck plate on the inner peripheral edge of the rectangular formwork especially along the corners, the cutting tool is not a circular tip saw but a reciprocating saw, a reciprocating saw, or the like. It is preferable to use a working cutting tool. The attachment described in Patent Document 1 is known as an attachment for fixing such a cutting tool and forming a through hole efficiently and accurately. The fixture described in Patent Document 1 is attached to an upper flange provided on the top of the mold. The deck plate is cut by attaching the cutting tool to the fixture and moving the cutting tool along the upper flange.

Utility Model Registration No. 3190546 Gazette

Since the fixture described in Patent Document 1 is attached to the upper flange of the mold, its attachment strength depends on the shape and strength of the upper flange. For example, when the width of the upper flange is small or the plate thickness of the upper flange is small, the upper flange is deformed by the pressure of the operator pressing the cutting tool or the reaction force received from the cutting tool, and the cutting tool is moved to the upper flange. There is a risk that it will not be able to move along. Further, since the cutting tool is fixed to the fixture by the bent plate, the mounting angle of the cutting tool cannot be easily changed according to the dimensions such as the height of the formwork. Furthermore, since the bent plate supports the cutting tool in the shape of a cantilever, it may bend due to the pressure that the operator presses on the cutting tool, the reaction force received from the cutting tool, etc., and stable work is performed. Can't.

An object of the present invention is to provide a cutting tool fixture capable of stably fixing a cutting tool to a mold.

According to one aspect of the present invention, it is a cutting tool attachment for cutting a deck plate along the inner peripheral edge of the formwork to form a through hole, and is a straight line attached to the facing inner wall surface of the formwork. Provided is a cutting tool attachment characterized by comprising a shaped guide member and a holding member that can move along the guide member while holding the cutting tool.

The guide member may be configured to be expandable and contractible. Further, even if the holding member has a locking mechanism, the locking mechanism enables the holding member to move in the cutting direction and locks the movement in the direction opposite to the cutting direction. Good. The locking mechanism may be configured so that the cutting direction can be switched. The locking mechanism has two locking plates that penetrate the guide member and are arranged adjacent to each other, and one of the locking plates is arranged at an angle with respect to the axis of the guide member. The other locking plate is arranged vertically, and when the holding member moves in a direction opposite to the cutting direction, the one locking plate is more inclined to lock with the guide member, and the holding member. When moves in the cutting direction, the one locking plate may move so as to be perpendicular to the axis of the guide member so as not to lock with the guide member. The locking plate arranged at an angle may be switchable. The guide member may have a width adjusting mechanism. The width adjusting mechanism may have two plates superposed on each other and may be adapted to the formwork by changing the superposition of the two plates. One end may be further provided with a fall prevention member attached to the formwork and the other end attached to the fitting of the cutting tool.

According to the aspect of the present invention, it is possible to obtain a common effect of providing a cutting tool fitting capable of stably fixing the cutting tool to the mold.

FIG. 1 is a perspective view of a usage state of a cutting tool fitting according to an embodiment of the present invention. FIG. 2 is a view of FIG. 1 in the cutting direction. FIG. 3 is a perspective view of the holding member. FIG. 4 is a vertical cross-sectional view of the holding member. FIG. 5 is another vertical cross-sectional view of the holding member. FIG. 6 is a vertical cross-sectional view of the holding member in a used state. FIG. 7 is a cross-sectional view of the holding member in line AA of FIG. FIG. 8 is a cross-sectional view taken along the line AA of FIG. 4 in another state of the holding member. FIG. 9 is a cross-sectional view of the holding member in line AA of FIG. 4 in still another state.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A common reference code is attached to the corresponding components throughout the drawings.

FIG. 1 is a perspective view of a fixture 10 of a cutting tool 1 according to an embodiment of the present invention, and FIG. 2 is a view of FIG. 1 in the cutting direction. The cutting tool 1 is a cutting tool provided with a saw blade (blade). The cutting tool 1 is preferably a reciprocating cutting tool such as a saver saw or a reciprocating saw. The cutting tool 1 has a tool body 2 and a saw blade 3, and cuts the deck plate 110 by reciprocating the saw blade 3.

The fixture 10 has a guide member 20 and a holding member 30.

The guide member 20 includes a guide main body 21 which is a linear member, a male screw rod 22 having male threads formed on the outer peripheral surface, a support member 23, a first support plate 24, and a second support plate 25. are doing. The guide body 21 preferably has a circular cross section. A female screw is formed on the inner surface of the end portion of the guide main body 21. A support member 23 is attached to one end of the male screw rod 22, and the other end of the male screw rod 22 is screwed with a female screw at the end of the guide main body 21. Therefore, by grasping and rotating the support member 23, the amount of protrusion of the male screw rod 22 and the support member 23 with respect to the guide main body 21 can be changed. That is, the guide member 20 is configured to be expandable and contractible.

The guide member 20 may be configured to be expandable and contractible by means other than screwing. For example, the guide member 20 is composed of at least two tubular members, and a plurality of through holes evenly arranged on the same straight line are formed in each tubular member. These tubular members are fixed to each other by inserting the other tubular member into one tubular member and fastening bolts and nuts through the corresponding through holes. The guide member 20 may be adjusted to an arbitrary length by changing the insertion position of the tubular member.

The support member 23 is fixed to the first support plate 24. The first support plate 24 is formed with a plurality of mounting holes 26 evenly arranged on the same line. The second support plate 25 is formed with a plurality of mounting holes 27 evenly arranged on the same line at the same intervals as the mounting holes 26 of the first support plate 24. The first support plate 24 and the second support plate 25 are overlapped with each other and fixed to each other by fastening bolts and nuts through the mounting holes 26 and 27. The overall width of the first support plate 24 and the second support plate 25 is adjusted by superimposing the first support plate 24 and the second support plate 25, that is, by changing the positions of the mounting holes 26 and the mounting holes 27 to be fastened. can do. Therefore, the first support plate 24 and the second support plate 25 form a width adjusting mechanism.

The width adjusting mechanism may be configured by means other than the two plates. For example, as in the guide member 20 described above, the width may be adjustable by screwing, or the width may be adjustable by changing the fixed positions of the two tubular members.

FIG. 3 is a perspective view of the holding member 30, FIG. 4 is a vertical sectional view of the holding member 30, and FIG. 5 is another vertical sectional view of the holding member 30.

The holding member 30 is a member that can move along the guide member 20 while holding the cutting tool 1. The holding member 30 has a main body member 31. An insertion hole 32 is formed in the main body member 31 so as to penetrate the main body member 31. The guide body 21 of the guide member 20 is inserted into the insertion hole 32. The insertion hole 32 is divided into two in the axial direction by the recess 33 formed in the main body member 31. A switching rod 34 is arranged so as to penetrate the main body member 31 in parallel with the axis of the insertion hole 32 and straddling the recess 33. The switching rod 34 is movable in the axial direction. The switching rod 34 is preferably a columnar member. Two annular locking grooves 36 are formed on the outer surface near one end of the switching rod 34 arranged inside the main body member 31. One of both ends of the switching rod 34 protrudes from the main body member 31.

A locking rod 35 that penetrates the switching rod 34 perpendicularly to the axis is provided in the central portion of the switching rod 34 exposed in the recess 33. Each of both ends of the locking rod 35 protrudes. In the recess 33, two locking plates 37 are arranged adjacent to each other with the locking rod 35 of the switching rod 34 interposed therebetween. Each end of the two locking plates 37 is arranged in two grooves 33a provided on the bottom surface of the recess 33. Since the width of the groove 33a is larger than the thickness of the locking plate 37, the locking plate 37 can be freely inclined while the end portion of the locking plate 37 is arranged in the groove 33a. .. Each of the two locking plates 37 is provided with a locking hole 38. The guide body 21 of the guide member 20 is inserted into the locking hole 38. The inner diameter of the locking hole 38 is formed to be larger than the outer diameter of the guide main body 21 and further larger than the insertion hole 32. The switching rod 34 penetrates the two locking plates 37. The two locking plates 37 are movable with respect to the switching rod 34. Two coil springs 39 are arranged on the outer peripheral surface of the switching rod 34. The two locking plates 37 are arranged between the two coil springs 39.

The main body member 31 has a positioning member 40 arranged perpendicular to the switching rod 34. The positioning member 40 holds the ball via a spring at the tip inserted inside the main body member 31 (not shown). Therefore, the ball at the tip of the positioning member 40 can move in the direction perpendicular to the switching rod 34. The ball at the tip of the positioning member 40 is configured to be dispositionable in the locking groove 36 of the switching rod 34.

The main body member 31 has a fixing knob 41 arranged perpendicular to the switching rod 34 and the positioning member 40. The fixing knob 41 is screwed into the main body member 31. By rotating the fixing knob 41, the tip of the fixing knob 41 is strongly pressed against the switching rod 34, whereby the movement of the switching rod 34 in the axial direction can be restricted. The pressing can be released by rotating the fixing knob 41 in the opposite direction.

The main body member 31 has a mounting rod 42 that is arranged perpendicular to the axis of the insertion hole 32 and penetrates the main body member 31. The cutting tool 1 is attached to the attachment 10 by being connected to the attachment rod 42. The mounting rod 42 is selectively fixed by a fixing rod 43 arranged parallel to the axis of the insertion hole 32. The fixed rod 43 has an operating portion 44 at one end protruding outward. By rotating the operation unit 44, the user can rotate the fixing rod 43 and fix or release the mounting rod 42 as described later.

Next, the operation of the holding member 30 will be described with reference to FIGS. 4, 5, and 6. FIG. 6 is a vertical cross-sectional view of the holding member in a used state. In FIG. 4, the switching rod 34 is arranged closer to the left side, and the left end portion of the switching rod 34 protrudes from the main body member 31. In this state, the ball at the tip of the positioning member 40 is arranged in the locking groove 36 on the right side of the switching rod 34, and at this position, the movement of the switching rod 34 in the axial direction is fixed by the fixing knob 41. At this time, the locking plate 37 on the left side is arranged perpendicular to the switching rod 34, while the locking plate 37 on the right side is arranged so as to be inclined to the left.

On the other hand, in FIG. 5, the switching rod 34 is arranged closer to the right side, and the right end portion of the switching rod 34 protrudes from the main body member 31. In this state, the ball at the tip of the positioning member 40 is arranged in the locking groove 36 on the left side of the switching rod 34, and at this position, the axial movement of the switching rod 34 is fixed by the fixing knob 41. At this time, the locking plate 37 on the right side is arranged perpendicular to the switching rod 34, while the locking plate 37 on the left side is arranged so as to be inclined to the right.

With the fixing knob 41 loosened, the state shown in FIG. 5 can be switched by pressing the end of the switching rod 34 protruding to the left in FIG. On the other hand, with the fixing knob 41 loosened, the state shown in FIG. 4 can be switched by pressing the end of the switching rod 34 protruding to the right in FIG. At this time, the posture of the locking plate 37 is changed by being pressed by the locking rod 35 provided on the switching rod 34 and by the urging force of the coil spring 39.

The two locking plates 37 constitute a locking mechanism that allows the holding member 30 to move in the cutting direction and locks the movement in the direction opposite to the cutting direction. Specifically, when cutting to the left in FIG. 6, the guide main body 21 moves to the right relative to the holding member 30. At this time, since the locking plate 37 on the left side is arranged vertically, it does not come into contact with the guide main body 21 and does not hinder the movement of the guide main body 21. On the other hand, since the locking plate 37 on the right side is arranged in an inclined manner, the locking plate 37 is arranged so as to approach the vertical by locking between the inner surface of the locking hole 38, particularly the edge portion, and the outer surface of the guide main body 21. Posture changes. As the locking plate 37 approaches vertically, the locking force between the locking plate 37 and the outer surface of the guide body 21 decreases. Therefore, in FIG. 6, the guide main body 21 can move to the right relative to the holding member 30, and thus the holding member 30 can move in the cutting direction.

On the contrary, when the guide main body 21 moves to the left relative to the holding member 30, the locking plate 37 on the left side is arranged vertically as described above, so that the guide main body 21 comes into contact with the guide main body 21. It does not hinder the movement of the guide body 21. On the other hand, since the locking plate 37 on the right side is arranged so as to be inclined, the locking plate 37 is more inclined by locking between the inner surface of the locking hole 38, particularly the edge portion, and the outer surface of the guide main body 21. Posture changes. As the locking plate 37 is more inclined, the locking force between the locking plate 37 and the outer surface of the guide body 21 is increased. Therefore, in FIG. 6, the guide body 21 cannot move to the left relative to the holding member 30, and thus the holding member 30 moves to the right, that is, in the direction opposite to the cutting direction. Can not do it.

In FIG. 6, when it is desired to move the holding member 30 to the right for cutting, the movable direction of the holding member 30 with respect to the guide main body 21 can be switched by switching the position of the switching rod 34. Specifically, by putting the switching rod 34 in the state shown in FIG. 5, the locking plate 37 arranged at an angle is switched, and the guide main body 21 is relatively left with respect to the holding member 30. You will be able to move in the direction. Therefore, the locking mechanism is configured so that the cutting direction can be switched.

Next, a method of changing the amount of protrusion of the mounting rod 42 from the main body member 31 will be described with reference to FIGS. 7 to 9. 7 is a cross-sectional view of the holding member 30 in line AA of FIG. 4, FIG. 8 is a cross-sectional view of the holding member 30 in line AA of FIG. 4, and FIG. 9 is a cross-sectional view of the holding member 30 in another state. It is sectional drawing in still another state of the holding member 30 in line AA of FIG.

On the side surface of the mounting rod 42, two fitting recesses 42a separated in the axial direction and a first flat portion 42b arranged between the two fitting recesses 42a are formed. The fitting recess 42a is formed in a cylindrical surface shape extending in a direction perpendicular to the axial direction. A second flat portion 43a is formed on the side surface of the fixed rod 43.

For example, the state shown in FIG. 7 shows the state of the mounting rod 42 having a large protrusion amount. At this time, the columnar portion on the side surface of the fixed rod 43 is fitted into the fitting recess 42a to regulate the movement of the mounting rod 42 in the axial direction. When changing the protrusion amount of the mounting rod 42, the fixed rod 43 is rotated by rotating the operating portion 44 so that the second flat portion 43a is parallel to the first flat portion 42b of the mounting rod 42. To do. As a result, the mounting rod 42 can move in the axial direction without being restricted by the fixed rod 43 (FIG. 8). Therefore, when it is desired to reduce the protrusion amount of the mounting rod 42, as shown in FIG. 9, the mounting rod 42 is moved so that the fixing rod 43 is arranged in the fitting recess 42a different from that in FIG. Next, the operating portion 44 is rotated to fit the columnar portion on the side surface of the fixing rod 43 into the fitting recess 42a, and the mounting rod 42 is fixed.

Next, a method of using the fixture 10 and a cutting method using the cutting tool 1 will be described with reference to FIGS. 1 and 2. A rectangular metal formwork 100 formed in a tubular shape is fixed to the metal deck plate 110 for the floor slab. Specifically, in the formwork 100, the outer shape of the rectangular parallelepiped is formed by the side wall 101, and in the installed state, the upper flange 102 is formed over the entire circumference at the edge of the upper opening, and the edge of the lower opening is formed. The lower flange 103 is formed over the entire circumference. The lower flange 103 is fixed to the deck plate 110. In the mold 100, for example, the side wall 101 is formed so that an opening of 1200 mm × 300 mm is formed, and the height of the side wall 101 is, for example, 150 to 600 mm.

First, the fixture 10 is attached to the inside of the formwork 100 fixed to the deck plate 110. At this time, the cutting tool 1 is not attached to the attachment 10, that is, the holding member 30. As described above, the fixture 10 is configured such that the guide main body 21 can be expanded and contracted by rotating the support member 23. Therefore, the guide member 20 is attached by adjusting the length of the guide main body 21 and stretching it between the facing side walls 101 of the formwork 100, that is, the inner wall surface of the side wall 101 corresponding to the short side of the rectangle in FIG. Further, the overall widths of the first support plate 24 and the second support plate 25 are adjusted to fit between the inner wall surfaces of the side wall 101 facing the mold 100, that is, the side wall 101 corresponding to the long side of the rectangle in FIG. Let me. Depending on the size and shape of the formwork 100, the first support plate 24 and the second support plate 25 may be replaced to better fit the formwork 100.

In this state, the cutting tool 1 is attached to the holding member 30, and the saw blade 3 of the cutting tool 1 is used to cut the deck plate 110 along one side of the inner peripheral edge C (FIG. 2) of the mold 100. .. When the cutting of one side of the inner peripheral edge C of the mold 100 is completed, the fixture 10 is removed from the mold 100. Next, in order to cut another side of the inner peripheral edge C of the mold 100, the guide member 20 is attached to the mold 100 and cut by changing the posture by 90 degrees or 180 degrees. Depending on the size and shape of the formwork 100, it may be replaced with a longer or shorter guide member 20. This is repeated to cut all the inner peripheral edges C of the mold 100, and the cutting work is completed.

When the cutting of the deck plate 110 is completed, the rectangular section falls downward. In this regard, one end of the wire or the like is attached to the formwork 100, for example, the upper flange 102 in advance, and the other end is attached to the exposed deck plate 110 portion through the opening of the formwork 100. Thereby, it is possible to prevent the section of the deck plate 110 from falling after the cutting operation.

Further, after the cutting work is completed, it is necessary to remove the cutting tool 1 and the fixture 10 from the mold 100. At this time, since the through hole is already formed in the portion of the deck plate 110 in the formwork 100, there is a risk that the cutting tool 1 and the fixture 10 may be accidentally dropped. In this regard, a connecting member such as a carabiner attached to one end of a string-shaped member such as a rope in advance is connected to the guide body 21 or the male screw rod 22 of the guide member 20, and the other end is connected to the formwork 100, for example, the upper flange 102. Attach to. Thereby, it is possible to prevent the cutting tool 1 and the fixture 10 from falling during the removal work. Therefore, the fixture 10 may have a fall prevention member at one end that is attached to the formwork 100 and the other end that is attached to the fixture 10 such as the guide member 20.

The guide member 20 may adopt any configuration as long as it is attached to the facing inner wall surface of the formwork. For example, the guide member 20 may be attached to the inner wall surface by adhering both ends of the guide member 20 to the inner wall surface. Further, the guide member 20 may be attached to the inner wall surface by temporarily fastening both ends of the guide member 20 to the inner wall surface with screws or the like.

As described above, in order to perform the cutting work, the guide member 20 is first attached to the mold 100, and then the cutting tool 1 is attached to the holding member 30. At this time, as shown in FIG. 2, when there is not enough space between the holding member 30 and the side wall 101 of the mold 100, the mounting rod 42 is easily inserted into the mounting hole on the cutting tool 1 side. Can't. Therefore, as described above, the cutting tool 1 can be easily mounted by first reducing the protruding amount of the mounting rod 42, arranging the cutting tool 1 in the vicinity, and then increasing the protruding amount of the mounting rod 42.

According to the fixture 10, since the guide member 20 is attached to the facing inner wall surface of the mold 100, the cutting tool 1 can be stably fixed to the mold 100. Further, the mounting position of the inner wall surface of the guide member 20 can be easily changed. Further, the first support plate 24 and the second support plate 25 of the width adjusting mechanism can be appropriately changed according to the mounting position of the inner wall surface of the guide member 20. Thereby, the positional relationship between the cutting tool 1 and the side wall 101 can be made appropriate. Further, since the holding member 30 can freely rotate around the guide member 20 and the cutting tool 1 can freely rotate around the mounting rod 42, the cutting work can be performed while freely changing the posture of the cutting tool 1. it can.

Further, since the locking mechanism enables the holding member 30, that is, the cutting tool 1 to move in the cutting direction and locks the movement in the direction opposite to the cutting direction, the cutting operation can be smoothly performed. .. That is, the operator can move the cutting tool 1 in the cutting direction by pressing the cutting tool 1 with a predetermined force, while trying to move the cutting tool 1 in the direction opposite to the cutting direction. The reaction force at the time of cutting is suppressed by the locking mechanism.

Further, since the cutting tool 1 is rotatably supported around the mounting rod 42, the operator can lift the rear end portion of the tool body 2 or by the weight of the cutting tool 1 to obtain the deck plate 110. The pressing force required for cutting can be easily applied to the body. Further, by appropriately adjusting and maintaining the posture of the cutting tool 1 around the mounting rod 42, the weight of the cutting tool 1 is utilized and the cutting tool 1 is cut without the operator actively moving the cutting tool 1. Can be made to progress.

1 Cutting tool 10 Mounting tool 20 Guide member 21 Guide main body 24 1st support plate 25 2nd support plate 30 Holding member 31 Main body member 34 Switching rod 37 Locking plate 100 Formwork 101 Side wall 110 Deck plate

Claims (11)

A cutting tool fixture for cutting a deck plate along the inner edge of the formwork to form a through hole.
A single guide member with a straight and circular cross section that is attached to the opposing inner walls of the formwork,
A cutting tool attachment characterized by comprising a holding member that can move along the guide member by utilizing the weight of the cutting tool while holding the cutting tool. The attachment for a cutting tool according to claim 1, wherein the guide member is configured to be expandable and contractible. The holding member has a locking mechanism and
The attachment tool for a cutting tool according to claim 1 or 2, wherein the locking mechanism enables movement of the holding member in the cutting direction and locks the movement in a direction opposite to the cutting direction. A cutting tool fixture for cutting a deck plate along the inner edge of the formwork to form a through hole.
A linear guide member attached to the opposite inner wall surface of the formwork,
A holding member that can move along the guide member while holding the cutting tool.
The holding member has a locking mechanism and
A tool fitting for a cutting tool, wherein the locking mechanism enables movement of the holding member in a cutting direction and locks the movement in a direction opposite to the cutting direction. The attachment for a cutting tool according to claim 4, wherein the guide member is configured to be expandable and contractible. The attachment tool for a cutting tool according to any one of claims 3 to 5, wherein the locking mechanism is configured to be able to switch the cutting direction. The locking mechanism has two locking plates that penetrate the guide member and are arranged adjacent to each other.
One of the locking plates is arranged at an angle with respect to the axis of the guide member, and the other locking plate is arranged perpendicular to the axis.
When the holding member moves in a direction opposite to the cutting direction, the one locking plate tilts more to lock with the guide member, and when the holding member moves in the cutting direction, the one engaging member is engaged. The attachment for a cutting tool according to any one of claims 3 to 6, wherein the stop plate moves so as to be perpendicular to the axis of the guide member and does not lock with the guide member. The fitting for a cutting tool according to claim 7 , wherein the locking plate arranged at an angle can be switched. The fitting for a cutting tool according to any one of claims 1 to 8 , wherein the guide member has a width adjusting mechanism. The fitting for a cutting tool according to claim 9 , wherein the width adjusting mechanism has two plates that are superposed on each other, and the fitting of the two plates is adapted to the mold by changing the superposition of the two plates. The cutting tool fitting according to any one of claims 1 to 10 , further comprising a fall prevention member having one end attached to the formwork and the other end attached to the cutting tool fitting.

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