JPH0767681B2 - Electric circular saw - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric circular saw for cutting an object to be cut such as wood or metal by rotating a rotary saw blade, and more specifically to storing cut (cut) chips .
It is about structure .

[0002]

2. Description of the Related Art At present, in electric circular saws, wood, metal pipe, plastic, A
Various materials such as LC (foam concrete) materials can be cut (cut). Then, such course that chips for cutting various materials (chips) also become a likewise various. In general work sites, there is no particular problem if the chips are discharged to the outside, but when used in stores, home remodeling, remodeling, etc., it is a problem because the chips are polluted and the surroundings become dirty. In the interior work), it is necessary to cover the room with sheets, etc. to prevent dust from contaminating the room. Such dust collection type of circular saw is emerging that such chips from the point was to prevent as much as possible out to the outside. For example, Kokai Kai 62-144606
In the report, chips are stored on one side of the fixed cover that covers the rotary saw blade.
By providing a box, the cutting that occurs at the cutting part of the rotary saw blade
Debris is cut through the inside of the fixed cover that covers the rotary saw blade.
It is shown to fit in a waste storage box.

[0003]

By the way, the electric circular saw is
A motor for driving the rotary saw blade is installed on one side of the rotary saw blade.
And the other side is designed for convenient replacement of the rotary saw blade.
Or opened for observation of cutting conditions with a rotary saw blade.
Normally, the chip storage box is arranged.
Or, the following points become a problem. That is, the chip storage box
It is preferable that the scrap has a large chip storage capacity. Also, fixed cover
-The chip discharge part from the chip to the chip storage box is
It should be installed almost directly above the
It is preferable in terms of the efficiency of introducing chips. Where the public
As shown in the report, cut on the side where the motor is installed.
When arranging the waste storage box, do not avoid the motor etc.
Chips without sacrificing handling
It is difficult to increase the chip storage capacity of the storage box.
It In other words, increase the width and front-back length of the chip storage box.
If you work hard, you can increase the storage capacity.
The chip storage box pops out sideways or forward.
The work becomes difficult depending on the work place.
And the chip storage box is open for the rotating saw blade
Attach it to the other side and increase the chip storage capacity.
Ku, also the orientation on the cut portion to enhance the transfer efficiency of the chip
If chips are to be introduced from the
Kusu makes it difficult to see the cutting part of the rotary saw blade,
This causes workability to deteriorate.

The present invention was invented in view of the problems of the above-mentioned conventional example, and its purpose is to improve workability and workability.
Chips from the chip storage box without degrading handling
An object is to provide an electric circular saw that can increase the storage amount and the efficiency of introducing chips .

[0005]

In order to solve the above-mentioned conventional problems and achieve the object of the present invention, an electric circular saw according to the present invention comprises:
A base that can be placed on the upper surface of the work piece and a part of the base
A rotary saw blade that is rotated downward and is driven, and a rotary saw blade
Cover the upper edge of the base of the
Equipped with a chip discharge port above the cutting part near the base
Connected to the fixed cover and the discharge port of the fixed cover.
It has an opening through which it is arranged on one side of the rotary saw blade and cuts as described above.
And a chip storage box that stores the chips generated in the
In an electric circular saw,
Install it on the side opposite to the side on which
The cut section is located near the base of the box facing the cut section.
It is characterized in that a notch portion that opens to one side is provided .

Is the chip storage box on the side of the rotary saw blade?
It is formed by extending backward from the above
It is preferable that it is wide, and it is close to the base.
Providing a transparent protective cover that covers the cutting part of the nearby rotary saw blade,
In addition, the position where this protective cover covers the cutting part and the cutting part are exposed.
It is preferable to be able to slide freely between the position where it is put out.
Good

Further, the fixed cover is internally provided with a chip introduction chip.
And a chip discharge path separated by this rib.
Preferably there is.

[0008]

[ Function ] The chip storage box is arranged with the rotary saw blade drive member.
Since it is placed on the opposite side to the cut side, it stores chips.
It is easy to increase the amount, and the fixed cover
Communicate with the chip discharge port provided above the cutting part.
Because it has an opening that keeps the chip introduction efficiency high.
The chip storage box is close to the base.
A notch that opens the cutting part to the side facing the cutting part
The cut section can be easily inserted through the notch because it has a section.
Can be seen.

At this time, the chip storage box is on the side of the rotary saw blade.
It is formed to extend rearward from the surface and
If the width is wide, the chip storage box
The chip storage capacity can be further increased and the cutting operation
It is easy to see the front, which is the direction of work.

Also, the cutting portion of the rotary saw blade near the base is covered.
If you have a transparent protective cover,
There is no scattering of chips and the chips are not stored in the chip storage box.
The efficiency of introduction is further improved, and this protective cover covers the cutting part.
Freely slides between the cutting position and the position where the cutting part is exposed
Therefore, the visibility of the cutting part is better than the scattering of chips.
If important, we can accommodate this.

Further, a fixed cover is provided inside for introducing chips.
Equipped with a rib and a chip discharge path partitioned by this rib
If so, the efficiency of introducing chips into the chip storage box is further improved.
Can be turned on.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. Auxiliary electric saw to the handle 6 to the rear of the body 5
The strong piece 6a is provided on the top and bottom, and both are connected to each other.
The battery portion 10 is detachably attached to the rear end portion . By providing the reinforcing piece 6a for reinforcement, the handle portion 6 can be made thin and easy to grip. Further, by reinforcing the reinforcing piece 6a, the reinforcing piece 6a will not be damaged even if it is accidentally dropped , and the reinforcing piece 6a is positioned between the hand holding the handle portion 6 and the workpiece 32 to protect the hand. It is like this. The motor 7 projecting from the one side of the front portion of the main body 5, Yes and the rotary saw blade 1 is provided to be rotated by the motor 7 to the other side of the front part of the body 5, is yet another side of the front portion of the main body 5 and the each other by providing <br/> fixed cover 8 Wa, Yes substantially upper half of the rotating saw blade 1 covered by a fixed cover 8, also in the front lower surface side of the main body 5 there is attached a base 2 , The lower half of the rotary saw blade 1 is the base 2
From the long groove 9 of the above.

Reference numeral 28 in FIG. 6 is a switch operation.
Part, 29 is a switch, 30 is a switch operating part28The lock
KuforSwitch lock button, 31 is a saw blade for rotating the motor 7
A gear box containing a gear for transmitting to the mounting shaft 11.
It's a cus.the aboveThe rotary saw blade 1 is provided in the gear box 31.
Mounted on the saw blade mounting shaft 11 located at the center of the cylindrical portion 31a.
Attached.Cylindrical part provided in the gear box 31 described above
A movable cover 3 is rotatably attached to 31a. Yes
The moving cover 3 projects downward from the base 2 of the rotary saw blade 1.
It has a U-shaped cross section so as to cover the peripheral edge of the part.
The movable cover 3 is integrally formed of synthetic resin. This
The movable cover 3 has a substantially U-shaped cross section in the embodiment shown in the accompanying drawings.
ConditionAndOne side piece 3a is long and the other side piece 3b is short
The longer side piece 3a is lower than the base 2 of the rotary saw blade 1.
To cover almost all of one side of the protruding part
The shorter side piece 3b is the base 2 of the rotary saw blade 1.
Closer to the outer edge of the other side of the part that protrudes below
It covers the side of the white part. Provided on top of the movable cover 3
A spring support portion 12 and a spring support portion 13 projecting from the main body 5,
Both ends of the spring member 14 consisting of a pull springAttach
hand,The circumference of the part of the rotary saw blade 1 that projects downward from the base 2
The edgeThe movable cover 3The state of FIG. 3 covering the spring material 1
FourofThere is no load. And when cutting
An object hits the front end of the movable cover 3 and is rotated by the rotary saw blade 1.
When cutting,Movable cover 3IsAgainst the spring material 14
14 in the clockwise direction as shown in FIG.
It is designed to go into the fixed cover 8. cross section
The front end of the substantially U-shaped movable cover 3 is reinforced with metal.
Board 4ToIt is provided. In the embodiment shown in FIG. 11, the reinforcing plate 4
Is the movable cover 3ofFront end of outer peripheral bottom and movable cover 3
Has a shape along the front ends of both side surfaces. Where the reinforcement
The plate 4 is at least the front end portion of the outer peripheral bottom surface of the movable cover 3,
A shape along the front end of one side surface of the movable cover 3Become me
It ’s good.In addition, the movable cover 3 having a substantially U-shaped cross section
Both side pieces 3a, 3bbothLong and rotating saw blade 1 base 2
Cover almost the entire surface on both sides of the part that protrudes downward.
If so, the outer peripheral bottom surface of the movable cover 3
Of the front ends of the two long side pieces 3a, 3b
It may be provided so as to extend over almost the entire length. Also made of metal
Guy formed by curling on the bottom 4a of the reinforcing plate 4.
Do part 15ToIt is provided. Metal reinforcing plate 4 made of synthetic resin
To attach to the movable cover 3 of, for example, as shown in FIG.
On the front end of the movable cover 3 made of synthetic resin, a metal reinforcing plate
4 is fitted and the boss 16 provided on the movable cover 3 is attached to the reinforcing plate 4.
Holes 17 provided on both side pieces 4b, 4cToInset and heat
Secure with a seal.

[0014] The front portion of the fixed cover 8 is provided with a chip introducing ribs 19 as shown in FIG. 8, the rotation saw blade 1 is passed through the longitudinal groove 20 provided in the chip introduction rib 19 .
The front portion of the fixed cover 8 partitioned by the chip introducing rib 19 serves as a chip discharge passage 21. A duct 22 is provided on the upper side surface of the front portion of the fixed cover 8, and the duct 22 and the chip discharge path 21 communicate with each other.
Further, the duct 22 has a discharge port 23 that opens rearward.
It is provided. By providing the chip introducing rib 19 in the fixed cover 8, the chips are prevented from being guided by the rotation of the rotary saw blade 1 and moving backward to be scattered, so that the chips can be reliably discharged to the duct 22 side. .

The side of the body 5 on which the fixed cover 8 is provided
The chip storage box 24 as shown in Fig. 9 can be freely attached and detached.
Mounted on. In this case, in front of the chip storage box 24
So that the side of the part and the side of the fixed cover 8 overlap
To install,One of the front of the chip storage box 24
The edge of the opening 24a provided at the upper part of the side surface is fixed to the fixed cover 8
Just in front of the duct 22 provided on the upper front end of the side surface of the
It is locked to the locking hook 22a that protrudes forward
Then, the chip storage box 24 is projected to the rear part of the side surface of the main body 5 side.
The elastic engaging hook 24b provided on the rear portion of the main body 5 is
Rear end of handle 6ToDetachable in the provided engagement groove 10a
It is attached by engaging. Of course mounting other than the above
The chip storage box 24 can be attached and detached by means of a scraper.
It's okay. Chip storage box 24 like this
If it is supported and attached to the front and rear ends of the
Since the storage box 24 can be stably supported at both ends,
The attachment is stable and suddenly due to movement during work or vibration due to cutting
It does not come off, and the duct 22
The fixed cover 8 can be installed by mounting near the opening 24a.
There is a gap betweenDoes not occurAnd if the chips are in this part
Can be prevented from leaking outside. Also, chip collection
Place the storage box 24 on the side of the fixed cover 8 as described above.
When installed by twisting, the duct 22 protruding from the fixed cover 8
Collects chips from the opening 24a of the chip storage box 24.
So that it fits into the upper part of the front part of the storage box 24
And the discharge port 23 of the duct 22 is a chip storage box.
It will open rearward at the front of the space 24.
It The chip storage box 24 is long in the front and rear,
It is attached to the side of the fixed cover 8 in a stack, and the base
Although it is mounted close to the base 2 above 2,
The lower surface of the front end of the chip storage box 24 is notched.
Therefore, the cutout portion 24c is formed. This notch 24c
Is the opening where the duct 22 is fitted24aCorresponding downward
It is provided at the position where And this chip storage box 2
4 is provided with a notch 24c on the lower surface of the front end thereof.
With the rotary saw blade 1 even with the storage box 24 attached
Workpiece32It ’s easy to see the cutting part of
And can be cut accurately. Also, chips
The storage box 24 is long in the front-rear direction as shown in FIG.
It is formed so that it becomes wider toward the rear and rotates.
The width of the chip storage box 24 in the side portion of the saw blade 1.
Is becoming narrower. Therefore, one part of the rotary saw blade
In the case of the
Comfortable by suppressing the waste storage box 24 as much as possible
Ready to work. Also rotate like this
Reduce the lateral protrusion of the saw blade 1 part
So that you have a good view in the front and you can perform accurate cutting work.
It has become. Rotation on the rear end surface of the chip storage box 24
A lid 26 rotatably attached by a support portion 25 opens and closes.
It is provided freely. Also, the rear end of the chip storage box 24
Across the side and top at the upper corner opposite the main body 5
Air outlet 27ToIt is provided. in this way,
Upper part of the rear end of the chip storage box 24 opposite to the main body 5
Air exhaust port 27 so that it covers the side and top at the corners of
ToIf provided, it will be introduced and stored in the chip storage box 24.
Chips to be scraped off from the lower rear part of the chip storage box 24
They are stored in order, but they are separated from this chip storage location.
Air can be exhausted from the position, chip storage box
Improves the ability to store chips in the space 24,
-No leakage from the outlet 27,
Exhaust air with fine chipsButComfortable work without hitting
Will be able to In addition, the chip storage box 24 is
It is transparent so that the amount of accumulated chips can be visually confirmed from the outside.
ing.

A transparent protective cover 33 is attached to the lower portion of the front portion of the fixed cover 8 so as to be slidable in the vertical direction. Then, for example, when the metal workpiece 32 is cut, or when it is troublesome that cutting scraps are scattered to the outside,
The lower portion of the protective cover 33 is lowered so as to project downward from the lower end of the front end portion of the fixed cover 8 to bring the lower end of the protective cover 33 close to the base 2 to prevent cutting chips from scattering to the outside. ing. Further, in this case, since the protective cover 33 is transparent, it is possible to see the portion where the object 32 to be cut is cut by the rotary saw blade 1. Of course, if the cutting dust is not a problem even if it scatters outward from the lower portion of the lower end of the front end of the fixed cover 8, move the protective cover 33 upward as shown in FIGS. 12 and 13. , The object to be cut 3 by the rotary saw blade 1
It is possible to perform the cutting work while directly observing the part where 2 is cut.

By the way, in the present invention, as shown in FIG. 5, since the motor 7 is arranged on one side of the handle portion 6 and the chip storage box 24 is arranged on the other side, the weight in the left-right direction is set. It has a good balance and can be easily worked when holding the handle portion 6. Further, the rotary saw blade 1 and the object 32 to be cut are positioned at right angles at the time of cutting, so that accurate cutting can be performed.

Further, as shown in FIG. 5, the rotary saw blade 1 is moved forward.
By arranging the motor 7 and the battery portion 10 at the rear, the weight balance in the front-rear direction with the handle portion 6 as the center is improved, and the work can be performed easily without causing fatigue. Therefore, in order to use the electric circular saw of the present invention, the rotary saw blade 1
The electric circular saw is moved forward while rotating, and the object 32 to be cut is cut by the portion of the rotary saw blade 1 protruding downward from the base 2. In this case, the front end of the movable cover 3 is pushed rearward by the object to be cut 32, so that the movable cover 3 retracts against the spring member 14 as shown in FIG. Inside, the object to be cut is cut in this state. At this time , since the metallic reinforcing plate 4 is provided at the front end of the movable cover 3 made of synthetic resin, the metallic reinforcing plate 4 at the front end of the movable cover 3 hits the front end of the workpiece 32. Therefore, even if the object to be cut 32 is a thin metal plate or a metal material and has an edge, the object to be cut 32 bites into the front end of the movable cover 3 or the front end of the movable cover 3 is scraped. The movable cover 3 rotates smoothly without moving. By providing the guide portion 15, the electric circular saw can smoothly slide on the object to be cut 32 even if the object to be cut 32 such as a thin metal plate is cut and a return occurs in the direction of the base 2. , Workability is good and you will not get tired . Of course in the present invention, not only metal, it can be cut ones trees other various.

Here, a place where it is troubled if chips are discharged and the surroundings are polluted, such as in the case of remodeling or remodeling a store or a house,
In the case of indoor work, as shown in FIG. 12, a chip storage box 24 is attached and used so as not to be contaminated with chips. In this case, the cutting debris cut by the rotating saw blade 1 object to be cut 32 is introduced into the chip discharge passage 21 formed inside the front portion of the fixed cover 8, scattering is guided by the chip introduction rib 19 From the discharge port 23 of the duct 22 communicating with the chip discharge path 21 while preventing
Will be introduced in . At this time, the chips are stored in the chip storage box 24.
It is discharged from the upper part of the front part of the inside toward the rear and accumulated in the chip storage box 24. Exhaust air is provided at the rear end of the chip storage box 24 at an upper corner opposite to the main body 5 so as to extend over the side surface and the upper surface 27.
It is discharged from the inside so that it does not hit the worker.
Then, when discarding the chips accumulated in the chip storage box 24, the chip storage box 24 is detached from the main body 5, and the chip storage box 24 is carried to the dumping place to carry the lid 26.
Open the and discard the chips inside.

Of course, in the present invention, when there is no problem even if chips are discharged and scattered at a general work site, as shown in FIG. 13, the chip storage box 24 is used with the chip storage box 24 removed from the main body 5. To do. In this case, even if the chip storage box 24 is removed, since the substantially upper half of the rotary saw blade 1 is covered with the fixed cover 8, there is no problem in terms of safety, and further, the front part inside the fixed cover 8 is chipped. a discharge passage 21, the duct 22 is provided on the upper side of the front portion of the fixed cover 8, to communicate the duct 22 and the chip discharge passage 21, the duct 2
Since the discharge port 23 is formed in the rearward direction in 2 ,
The chips are ejected from the side of the worker holding the handle 6 toward the rear.
It Therefore, chips are not directly applied to the worker.

[0021]

According to the present invention, as described above, the chip collection
The storage box is opposite to the side on which the drive member of the rotary saw blade is arranged.
Being placed on the side, it is restricted by the driving member.
Without increasing the amount of chips that can be stored.
And is installed above the cutting part of the fixed cover.
Since it has an opening that communicates with the chip discharge port,
The chips generated at the cutting section are smoothly transferred to the chip storage box side.
Keeps the efficiency of chip introduction high as it flows into
The chip storage box can be cut near the base.
The notch that opens the cutting part to the side is provided at the part facing the part.
Therefore, it does not mean that a chip storage box is provided.
No, the chip storage box hinders the visibility of the cutting part.
Cutting while looking at the cutting part of the rotating saw blade
(Cutting) work is possible, which reduces workability.
There is no such thing.

At this time, the chip storage box is placed on the side of the rotary saw blade.
It is formed to extend rearward from the surface and
If the width is wide, the chip storage box
The width of the part that is located on the side of the rotary saw blade is used to store chips.
Can be kept small and cut without reducing the amount
It becomes easier to see the front part, which is the direction of cutting work and cutting work,
Work can be performed accurately and easily.

Also, the cutting portion of the rotary saw blade near the base is covered.
If you have a transparent protective cover,
There is no scattering of chips and the chips are not stored in the chip storage box.
The introduction efficiency is further increased and the visibility of the cutting part is maintained.
The protective cover can be
Keep it freely slidable between the exposed parts
If the visibility of the cutting part is more important than the scattering of chips,
If this is the case, this can be dealt with.

Further, a fixed cover is provided inside for introducing chips.
Equipped with a rib and a chip discharge path partitioned by this rib
If so, the efficiency of introducing chips into the chip storage box is further improved.
Can be turned on.

[Brief description of drawings]

FIG. 1 is a perspective view seen from one side of the present invention.

FIG. 2 is a perspective view seen from the other side of the above.

FIG. 3 is a side view of the above.

FIG. 4 is another side view of the above.

FIG. 5 is a plan view of the above.

FIG. 6 is a side view showing a state in which one side of a cover of the above main body is removed.

FIG. 7 is a perspective view showing a state in which the same chip storage box as the above is removed.

FIG. 8 is a partially cutaway side view of the above.

FIG. 9 is a drawing showing the above-mentioned chip storage box, (a)
Is a side view and (b) is a plan view.

FIG. 10 is a perspective view of a portion in which a reinforcing plate is attached to the above movable cover.

FIG. 11 is a perspective view of the same reinforcing plate.

FIG. 12 is a side view showing a state in which the transparent cover is raised with the above-described chip storage cover attached.

FIG. 13 is a side view showing a state in which the transparent cover is raised in a state in which the above chip storage cover is not attached.

FIG. 14 is a side view showing a state in which the above-mentioned object to be cut is being cut.

[Explanation of symbols]

 1 Rotating Saw Blade 2 Base 8 Fixed Cover 19 Chip Introducing Rib 21 Chip Discharge Path 24 Chip Storage Box 24a Opening 24c Notch 33 Protective Cover

Claims (5)

[Claims] 1. A base mounted on the upper surface of a workpiece,
A rotary saw that is driven to rotate with a part of it located below the base
While covering the blade and the peripheral edge of the rotary saw blade above the base
Chips above the cutting part near the base of the rotary saw blade
Of the fixed cover with the discharge port of
An opening communicating with the discharge port is provided on one side of the rotary saw blade.
A chip storage button that is placed and stores the chips generated at the cutting section.
Box for electric circular saw
Is placed on the side of the rotary saw blade opposite to the side on which the drive member is placed.
Cut in the part facing the cut part near the base.
An electric circular saw having a cutout portion that opens a cut portion laterally . Wherein electric circular cutting chip storage box according to claim 1, wherein the width as the rear has become widely <br/> with is formed to extend from the side surface of the rotating saw blade backwards saw. 3. A transparent protective cover for covering a cutting portion of the rotary saw blade near the base is provided.
The described electric circular saw. 4. The position where the protective cover covers the cutting portion and the cutting portion
The electric circular saw according to claim 3, wherein the electric circular saw is slidable between the exposed position and the position . 5. The fixed cover has a rib for introducing chips inside thereof.
The electric circular saw according to claim 1, further comprising: a chip discharge path partitioned by the rib .