JP4157960B2 - Portable electric connected circular saw - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a portable electric continuously mounted circular saw.
[0002]
[Prior art]
Conventionally, when a switch box or the like is embedded in the inner wall of a building, a ventilating fan opening is provided, and an opening for attaching an inspection opening or a square-type lighting fixture is opened on the ceiling, it is usually portable with a single circular saw. An electric circle saw is used, and the opening is opened by vertically drawing along the ink marking the opening edge to cut the cutting line. In the case of a square opening, the direction must be changed four times to cut the cutting line.
[0003]
As a portable electric device for opening a switch box, a product made by a company is marketed as an opening device that arranges a straight body into a square and converts a rotational force of 1 into a reciprocating motion on a straight line of 4 sides to cut it. However, since the opening of one cutting line is dedicated, the size cannot be adjusted, and the principle is complicated and fragile. There is also a product from another company that does not require centering by inserting a magnet for opening one switch box. This is because it detects and opens two magnets, so it opens in a figure of 8 and attaches wiring equipment, but it is difficult to operate unless you are used to it, so it is difficult to adjust the size because it is compatible with one piece. It takes a lot of work and is not efficient.
[0004]
Opening by turning and pulling manually requires labor and time just like operating a saw, and is not a good method. Until now, the openings on the inner walls of buildings have been mostly rectangular or square. In either case, a smearing operation was performed to draw two vertical and two horizontal black inks, and a single circular electric saw was cut along the black ink. You must change direction and do the same work four times. Therefore, the time and labor for opening increase. Therefore, there is a strong desire in the field to enable efficient and safe opening with less time and effort.
[0005]
However, there are many types of materials that can be used for inner walls, outer walls, ceilings, floors, roads, etc. that are subject to opening, such as board, veneer, concrete, asphalt, cardboard, and ready-made blocks (ALC). Since there are many types, finding the optimal relationship between the two has been unexpectedly difficult and has not been realized until now.
[0006]
Problems to be Solved by the Invention
Accordingly, it is an object of the present invention to provide a portable electric continuous circular saw that can be used for an inner wall of a building and the like and can be safely and efficiently opened in the object with less time and effort.
[0007]
[Means for Solving the Problems]
In order to achieve this object, according to the first aspect of the present invention, a plurality of disk-shaped circular saws are fixed to a single rotating shaft at a predetermined interval at the center thereof, and one end portion of the rotating shaft is fixed. Is a continuous circle formed as a rotational force passive part and the other end of the rotational shaft is formed as a shaft support part, an electric part connected to the rotational force passive part and transmitting the rotational force to the rotational shaft And a grip portion that is fitted to the shaft support portion and supports the rotating shaft during construction operation, thereby forming a portable electric continuous circular saw.
[0008]
In order to achieve this object, the invention according to claim 2 is characterized in that the plurality of the disk-shaped circles are two or more, and the shape of the circle is the same and / or the diameter of one circle is the other. This is an invention which is configured to improve workability by slightly increasing the diameter of this circle, for example, a 10 cm diameter circular saw with a diameter approximately 10% larger.
[0009]
In order to achieve this object, the invention according to claim 3 is an invention configured such that the predetermined interval between the disk-shaped circular saws is variable so as to be adapted to the shape of the object opening. .
[0010]
In order to achieve this object, the invention according to claim 4 is configured such that the electric part and the grip part have a function of not damaging the in-wall apparatus by adjusting the cutting depth in the object opening cutting line. It is an invention.
[0011]
In order to achieve this object, according to a fifth aspect of the present invention, the motorized portion and the grip portion are connected by a variable frame, and a safety cover that covers a circular saw is attached to a cross member of the variable frame so as to be freely positioned. To secure the safety against unexpected flying objects, and to attach the motorized part and the grip part to the tip of the two leg members of the variable frame so that the distance between the two members can be variably adjusted. It is an invention configured to be adaptable to the shape.
[0012]
In order to achieve this object, the invention according to claim 6 is characterized in that both ends of the rotating shaft are respectively attached to electric parts having the same rotating speed and rotating the rotating shaft, respectively. Then, it is the invention comprised so that a rotational force might be insufficient.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment modes of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a configuration of a portable electric continuously connected circular saw (1) of Example 1, and FIG. 2 is a perspective view of the same. The portable electric continuous circular saw (1) includes a continuous circular saw (2), an electric motor M connected to one end of a rotational shaft (4) constituting the continuous circular saw (2), and a rotational shaft ( 4) It is comprised from the grip part (8) connected with the other terminal. In the first embodiment, the continuous circular saw (2) and the electric part M are connected by fixing the nut part (41) to one end of the rotating shaft (4) and being inserted into the rotating part of the electric part M. The nut portion (41) is fitted and connected to the power socket (7). It is also possible to directly transmit the rotational force by inserting one end of the rotating shaft (4) into the rotating part of the electric part M without going through the nut part (41) and the power socket (7). The continuous circular saw (2) and the grip portion (8) are connected by pivotally supporting a mounting socket (42) fixed to the other end of the rotating shaft (4) on the grip portion (8). In Example 1, a three-part bolt was used for the rotating shaft (4), a nut portion (41) was formed on one end, and a mounting socket (42) was screwed on the other end. The nut part (41) was fixed to the shaft end by using three three-minute nuts (5) and tightening each other. The continuous circular saw (2) is composed of two or more circular saws (3). In Example 1, two diamond concrete cutters were used.
[0014]
The nut portion (41) is used by being fitted to a power socket (7) which is a three-minute nut socket. The rotating shaft (71) of the power socket (7) is inserted into the chuck of the rotating portion of the power side electric drill constituting the electric portion M, and transmits the rotational force to the rotating shaft (4). At this time, the mounting socket (42) on the terminal opposite to the rotating shaft (4) is pivotally supported by the grip portion (8). An impact L-type rotation transmission fitting was used for the grip portion (8). In addition, it replaces with a power side electric drill, and an electric sander can also be used in the state which removed the tooth | gear, or the state which does not remove a tooth | gear. The portable electrically connected circular saw (1) is operated by holding the motorized part M and the grip part (8) separately with both hands and moving them while pressing them against the object.
[0015]
FIG. 3 is a right side view of the continuous circular saw (2), and FIG. 4 is a left side view of the same. 3 shows the side surface on the nut portion (41) side, and FIG. 4 shows the side surface on the mounting socket (42) side. In other words, FIG. 3 and FIG. 4 show the front and back surfaces of the circular saw (3), the circular saw (3) is disk-shaped and has circular saw teeth (31) on the periphery. Yes. There are various kinds of round saws (3) depending on the object, and they are used according to their usage.
[0016]
FIG. 5 is an explanatory view showing a situation in which the circular saw (3) is fixed to the rotating shaft (4). Use a half-length bolt of a predetermined length for the rotating shaft (4), insert the center hole of the circular saw (3) through this, insert the mounting nut washer for sander (6) from the mounting socket (42) side, Then, two 5 minute washers (61) and a 3 minute nut washer (62) are inserted from the nut part (41) side, and then screwed with a 3 minute nut (5) from both sides of the rotating shaft (4) to be fixed. To do. The other circular saws (3) to be attached are fixedly attached to the same rotating shaft (4) so that the arrangement of the nut, the washer and the circular saw (3) is the same as the above arrangement. The interval between the circular saws (3) can be freely determined by positioning the nut (5) on the mounting socket (42) side. In this Example 1, the 3 minute nut (5) was used to fix the circular saw (3) to the rotating shaft (4). However, a vertical groove was carved into the 3 minute bolt, and the circular saw (3) A corresponding groove is also provided in the center hole of this, and a wedge is driven in by aligning the positions of both grooves, and clamped with an annular clamp from both sides of the circular saw (3). May be. Loosen the screws and slide to adjust.
[0017]
FIG. 6 is a perspective view showing a situation where a safety cover (23) for the circular saw (3) is mounted around the rotation shaft (4). The safety cover (23) has a half donut shape and is hooked by the rotating shaft (4). The safety cover (23) prevents damage caused by flying objects during operation. As another safety device, adapters (74, 81) (shown in FIG. 12) are provided on the electric part M and the grip part (8) in order to prevent unnecessary cutting of the in-wall equipment.
[0018]
FIG. 7 to FIG. 11 are explanatory views showing an operation procedure of cutting by the portable electric continuous circular saw (1) of the first embodiment. FIG. 7 shows a case where two cutting lines having a width of 200 mm are to be opened on the inner wall of a building, for example. Conventionally, two black inks ab and cd are drawn at intervals of 200 mm and cut along the black inks ab and cd, respectively. Therefore, two operations were necessary. On the other hand, according to the portable electric jointed circular saw (1) of the first embodiment, black is drawn on the center line (cl) ef from the point e to the point f between the points a and b, It is only necessary to cut along the line by aligning the center of the continuous circular saw (2). Although a line connecting bd in FIG. 7 is not drawn, if black is drawn on this line, a predetermined cutting is performed if the cutting operation is stopped by this black line. Therefore, the work is only required once. In the figure, M represents an electric part, and G represents a grip part (8). The operator holds and operates these M and G with both hands.
[0019]
FIG. 8 shows a case where a square opening having a side length of X mm is opened. First, the circular saw (3) of the continuous circular saw (2), which is the main member of the portable electric continuous circular saw (1), that is, the tooth spacing is set to X mm, and the tooth of the continuous circular saw (2) is set. When the center point is moved in the downward direction of the arrow along the vertical center line (vcl), the ab line and the cd line are cut. Next, when moving in the horizontal direction of the arrow along the horizontal center line (lcl), the ac line and the bd line are cut to complete the opening of the square abdc. In these cases, if the bd line and the cd line are drawn in advance at the ends of the vcl line and the lcl line, these lines are displayed as the end of work. Conventionally, four operations are required along each side, but two operations can be performed.
[0020]
FIG. 9 shows a case where a rectangular opening having a width of 50 mm and a height of 90 mm is opened so that the position of the center point of the rectangle is 150 mm from the window frame and 250 mm on the floor. First, the 150 mm line (vcl) and the 250 mm line (lcl), bd line, and cd line from the window frame are marked. Next, when the interval between the teeth of the continuous circular saw (2) is set to 50 mm, the center point of the tooth is cut downward in the direction of the arrow while matching the vcl line, and stopped at the bd black line, the ab line, cd line Is disconnected. Subsequently, the interval between the teeth of the continuous circular saw (2) is set to 90 mm, the center point of the tooth is cut to the right side of the arrow while being aligned with the lcl line, and stopped at the cd ink line, the ac line, bd The line is cut to complete the opening of the rectangle abdc. Only half of the conventional process is required.
[0021]
FIG. 10 shows a case where rectangular openings having the same height of 90 mm but different in width from 100 mm and 150 mm are opened from the floor at the same height. Black is drawn on each side of the two rectangular openings, then a horizontal lcl line is drawn with black from the floor to a wall surface of a predetermined height, and then two vertical vcl lines on the left and right sides at a predetermined interval. The ink is drawn with black to complete the preparation. Therefore, the interval between the continuous circular saws (2) is set to 90 mm, the cutting is started from the ab line while aligning the center point of the continuous circular saws (2) with the lcl line, and moved in the horizontal direction of the arrow as it is. Pull the continuous circular saw (2) upward on the outgoing cd line, and further move in the horizontal direction of the arrow to perform the same operation from the ef line to the gh line, and cut the ac line, db line, eg line, and fh line. To do. At this time, G displaying the grip portion (8) moves along the floor surface and serves as a guide. Subsequently, the interval between the circular saws (2) of the continuous circular saws (2) is set to 100 mm, the center of the circular saws (3) is moved along the center line vcl line of the ba line and the dc line, Starting from the ac line and moving downward and stopping at the bd line, the ab line and the cd line are cut, and an opening of the rectangle abdc is opened. Further, the interval between the circular saws (3) of the continuous circular saw (2) is set to 150 mm, and the ef line and the gh line are cut by moving along the center line vcl line of the ef line and the gh line, Opening of rectangular efhg. Since the parallel lines are cut at the same time, the process can be shortened to half of the conventional method.
[0022]
FIG. 11 shows a case where an oblong rectangle abdc, for example, an opening having a height of 1260 mm in the vertical ab and dc and a width of 300 mm in the horizontal ac and bd is opened. As preparation, black is drawn on the ac, bd, ab and cd lines, the vcl line connecting the center points of ac and bd, and the two horizontal lcl lines at a distance of 150 mm from ac and bd. First, the interval between the circular saws (2) and the circular saws (3) is set to 300 mm, and the center point of the circular saws (3) is moved vertically below the arrow while being aligned with the vcl line. Cut the cd line. With the distance between the circular saws (3) set to 300 mm, the circular saws (3) on the motorized part M side of the continuous circular saws (2) are aligned with the ac line, and the circular saws (3) The ac line is cut while the center is aligned with the horizontal lcl line. The same operation is performed to cut the lower bd line. Since the ac and bd lines cannot be cut at the same time because of the long rectangular shape at the top and bottom, it is necessary to cut an extra portion, but the work efficiency is good because it is not necessary to set the interval of the circular saw (3).
[0023]
FIG. 12 is a schematic diagram illustrating a configuration of the portable electric continuously connected circular saw (1) according to the second embodiment. The power-side electric part M and the grip part (8) were connected by the variable frame (22), and the safety cover (23) was attached to the variable frame (22) so that the attachment position could be moved. This is because the position of the circular body (3) changes depending on the object. Since the length of the continuous circular saw (2) differs depending on the cutting operation target, it is connected by a variable frame. In addition, adapters (74, 81) were attached to the electric part M and the grip part (8) in order to adjust the cutting depth so as not to damage other devices.
[0024]
In Example 1, two teeth with the same diameter were exclusively described. However, one of the two sheets has a slightly larger diameter than the other, so that the cutting operation is easier. This is because the larger circular saw (3) enters and stabilizes first, and this serves as a guide to easily enter another circular saw (3). As the length of the rotating shaft (4) increases, the rotational force decreases as the distance from the electric motor M increases. When used to form an opening with a width of about 1 m on a board such as a ceiling, the electric part M is attached in place of the grip part (8) and rotated in the reverse direction, and the number of rotations is adjusted. What is necessary is just to compensate for the lack of rotational force due to M. The portable electric continuous circular saw (1) can also be applied to soft materials such as paper. In the case of a hard material, a better result can be obtained by using a sander for the electric part M when used for the concrete demolition work for building construction.
[0025]
【The invention's effect】
According to the portable electric connected circular saw (1) according to the invention of claim 1, by changing the kind of the circular saw (3), a board, veneer, which forms a wall, an outer wall, a ceiling, a floor, a road, etc. It can be applied to concrete, asphalt, corrugated cardboard, ALC block, etc., and the conventional single-tooth product was difficult to blur, but the straight openings were easier to open because the fulcrum of the straight openings increased. It can be opened efficiently and safely in about half the time and effort.
[0026]
According to the portable electric continuous circular saw (1) according to the invention of claim 2, the number of circular saws (3) is arbitrary two or more, and usually when two pieces of the same type having the same diameter are used. However, if one circular saw body (3) is made slightly larger in diameter, this will stabilize by entering the cutting groove first, and this will serve as a guide, making it easier for other circular saws (3) to enter. There is an effect that the operation becomes easy.
[0027]
According to the portable electric connected circular saw (1) according to the invention of claim 3, it is optimally adapted to the shape, type and purpose of the opening by arbitrarily setting the mutual spacing of the circular saw (3). Can be made.
[0028]
According to the portable electric continuous circular saw (1) according to the invention of claim 4, by providing an adapter in the grip part (8) and the electric part M, the switch box or the like is hidden behind the board when the board is opened. However, an opening is possible without damaging those internal instruments.
[0029]
According to the portable electric continuous circular saw (1) according to the invention of claim 5, the safety cover can avoid unexpected damage caused by scattering of the circular saw body (3) and its constituent members accompanying high-speed rotation. it can. If various types of shafts with different lengths with different intervals between the circular saws (2) and the circular saws (3) are prepared, these can be immediately mounted on the variable frame for fine adjustment. Is no longer necessary.
[0030]
According to the portable electric coupled circular saw (1) according to the invention of claim 6, the rotational force of the rotary shaft (4) that falls as it moves away from the electric motor part M is compensated, and smooth opening work is achieved by the uniform axial rotational force. Can proceed.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the configuration of a portable electric continuously connected circular saw (1) of Example 1. FIG.
FIG. 2 is a perspective view of the portable electric continuous circular saw (1) according to the first embodiment.
FIG. 3 is a right side view of a continuous circular saw (2).
FIG. 4 is a left side view of a continuous circular saw (2).
FIG. 5 is a perspective view showing a situation where a circular saw (3) is fixed to a rotating shaft (4).
FIG. 6 is a perspective view showing a situation in which a safety cover (23) for a circular saw (3) is mounted around a rotating shaft (4).
FIG. 7 is an explanatory diagram illustrating an operation procedure of the portable electric continuously connected circular saw (1) according to the first embodiment.
FIG. 8 is an explanatory diagram showing an operation procedure of the portable electric continuously connected circular saw (1) according to the first embodiment.
FIG. 9 is an explanatory diagram showing an operation procedure of the portable electric continuously connected circular saw (1) according to the first embodiment.
FIG. 10 is an explanatory diagram illustrating an operation procedure of the portable electric continuously connected circular saw (1) according to the first embodiment.
FIG. 11 is an explanatory diagram showing an operation procedure of the portable electric continuously connected circular saw (1) according to the first embodiment.
12 is a schematic diagram showing a configuration of a portable electric continuously connected circular saw (1) of Example 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Portable electric continuous circular saw 2 Example 1 Circular circular saw 3 Circular saw 4 Rotating shaft 5 Nut 6 Washer 7 Power socket 8 Grip part 21 Variable frame 22 Safety cover 31 Tooth part of circular saw (3) 41 Nut part 42 Mounting socket 74, 81 Adapter M Electric part

Claims (6)

A plurality of disk-shaped circular saws, which are connected to one rotary shaft at a predetermined interval at the center thereof, are connected to one end of the rotary shaft and are electrically driven to transmit rotational force. A portable electric connected circular saw characterized by comprising a portion and a grip portion that pivotally supports the other end of the rotating shaft during operation. 2. The portable electric jointed circle according to claim 1, wherein the disk-shaped circular saw has the same shape, and the diameter of one round is slightly larger than that of the other round. This. The portable electrically connected circular saw according to claim 1, wherein a predetermined interval between the circular saws is variable. The portable electric connected circular saw according to claim 1, wherein the electric part and the grip part include an adapter for adjusting a cutting depth of the object to be cut. The electric part and the grip part are connected by a variable frame, a safety cover that covers a circular saw is attached to a crosspiece member of the variable frame so as to be freely positioned, and attached to a leg member tip of the variable frame. The portable electric connected circular saw according to claim 1, wherein the gap between the grip portion and the power socket is adjustable. 2. The portable electric jointly mounted circular saw according to claim 1, wherein both ends of the rotating shaft are configured to rotate the rotating shaft in the same direction and be respectively attached to the electric parts having the same rotation speed.

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