CN106607974A - Safety protection device for electric circular saw and method thereof - Google Patents
Safety protection device for electric circular saw and method thereof Download PDFInfo
- Publication number
- CN106607974A CN106607974A CN201710043882.3A CN201710043882A CN106607974A CN 106607974 A CN106607974 A CN 106607974A CN 201710043882 A CN201710043882 A CN 201710043882A CN 106607974 A CN106607974 A CN 106607974A
- Authority
- CN
- China
- Prior art keywords
- carbon filament
- coil
- relay
- protective device
- circular saw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
- B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Abstract
The invention relates to a safety protection device for an electric circular saw and a method thereof. The method comprises the steps: mounting a leakage protector and a carbon filament in a circuit; when a person is contact with the carbon filament, generating electric leakage and shunting at a fault point, wherein the leakage current is grounded through the human body, so that a current passes through a mutual inductor and the other group of coil of the mutual inductor will generate an inductive voltage; when the voltage value reaches the operation voltage value of silicon controlled, enabling a relay to act by conducting the silicon controlled and cutting off a power supply. By virtue of difference between a wood and human resistance, a high sensitivity electric leakage protection device mounted, so that the reaction speed is fast which is 0.1s; when the human body is far from the saw, the wood can pass the saw blade smoothly to work normally; when any part of the human body is close to the saw blade, the electric leakage protection device acts to cut off the power supply to prevent the human body from being hurt, thereby achieving a purpose of safe operation.
Description
Technical field
The present invention relates to woodworking machinery safety guard, i.e., the safety guard and its method of a kind of electric circular saw.
Background technology
At present woodworking circular saw due to it is quick and laborsaving with blank the characteristics of, commonly use in vast construction site.Woodworking circular saw
It is that arbor is installed on the table by bearing, saw blade is higher by work top, motor is arranged on below workbench, is used
Shi Kaidong motors, saw blade are rotated, and workman station is shifted onto timber for sawing beside saw blade with handss, sometimes work before the saw blade for flying to turn
Make time length, when having neglectful unavoidably, handss just touch the saw blade for flying to turn, and damage, and little then traumatic injury of skin is then cut greatly
Cut off the hands finger, this injury to human body is very big.The safety guard of one electric circular saw of invention is always carpenters and is concerned about
Problem.
The content of the invention
In order to avoid the accident that saw blade is hurted sb.'s feelings, the present invention proposes a kind of technical side of the safety guard of electric circular saw
Case.
The safety guard of this electric circular saw, including workbench, saw blade are installed on the table by installing hole, electricity
Machine is connected with the rotating shaft of saw blade by drive mechanism, and motor switch is also mounted on workbench, it is characterised in that on workbench,
Fender bracket is installed directly over saw blade, suspention on fender bracket has a carbon filament, and carbon filament is located at before saw blade, carbon filament by wire with
The induction coil of earth leakage protective device is connected, and earth leakage protective device is connected with and off switch, when the handss of staff touch carbon filament,
Earth leakage protective device action, on and off switch is closed makes motor stopping.
The operation principle of earth leakage protective device is：Earth leakage protective device and carbon filament are installed in the line, when carbon filament, someone touches
When, produce electric leakage and shunting is produced in trouble point, this leakage current Jing human body groundings have electric current to pass through in causing transformer, mutually
Another group of coil of sensor can produce induced voltage, and when this magnitude of voltage reaches controllable silicon action magnitude of voltage, controlled silicon conducting makes
The actuating of relay, cuts off the electricity supply.
The present invention is provided with highly sensitive earth leakage protective device, response speed using timber and the difference of human body resistance
Hurry up, be 0.1 second, when human body from saw blade farther out when, timber can pass through saw blade normal work, and any position of human body is near saw blade
When, earth leakage protective device action power dump, protection human body preserve from.Reach the purpose of safety work.
Description of the drawings
Fig. 1 is the structural front view of the present invention
Fig. 2 is the structure right view of the present invention
Fig. 3 is the circuit theory diagrams of the present invention
In figure：1st, workbench, 2, installing hole, 3, drive mechanism, 4, motor, 5, motor switch, 6, fender bracket, 7, carbon filament, 8, leakage
Non-electricity protector, 9, saw blade, 10, relay coil, 11, transformer, 12, isolation transformation.
Specific embodiment
It is as follows to the detailed description of the invention below in conjunction with the accompanying drawings：
In fig. 1 and 2, the safety guard of this electric circular saw, including workbench 1, saw blade 9 are installed by installing hole 2
On workbench 1, motor 4 is connected by the rotating shaft of drive mechanism and saw blade 9, and motor switch 5 is also mounted on workbench 1, work
Make on platform 1, the surface of saw blade 9 is provided with fender bracket 6, suspention on fender bracket 6 has carbon filament 7, and carbon filament 7 is located at before saw blade 9,
Carbon filament 7 is connected with the induction coil of earth leakage protective device 8 by wire, and earth leakage protective device 8 is connected with and off switch, works as staff
Handss when touching carbon filament 7,8 action of earth leakage protective device, on and off switch is closed shuts down motor 4.
In figure 3, the circuit of earth leakage protective device is as follows：220V alternating current power supplys one end passes through relay switch K1, relay
The rectification circuit that coil 10 is constituted with diode D1, D2, D3, D4 is connected, the anode of rectification circuit and one-way SCR T, negative electrode
It is connected, the induction coil of the trigger electrode of controllable silicon T and resistance R1, electric capacity C, the mu balanced circuit of diode D5 compositions and transformer 11
A is connected, and one end of another induction coil B of transformer 11 is by induction coil C, the current-limiting resistance R2 of isolating transformer 12 and ground
It is connected, carbon filament 7 is connected on the other end of coil B of transformer 11, isolates another coil D and relay K1 phases of transformation 12
Even, relay K1 is connected with 220V alternating current power supplys, and motor M is arranged in 220V alternating current power supplys by switching K2.
Claims (3)
1. a kind of safety guard of electric circular saw, it is characterised in that on the workbench of electric circular saw, the surface peace of saw blade
Equipped with fender bracket, suspention on fender bracket has carbon filament, and carbon filament is located at before saw blade, sense of the carbon filament by wire and earth leakage protective device
Coil is answered to be connected, earth leakage protective device is connected with and off switch, when the handss of staff touch carbon filament, earth leakage protective device is moved
Make, on and off switch is closed makes motor stopping.
2. a kind of safety guard of electric circular saw according to claim 1, it is characterised in that the electricity of earth leakage protective device
Road is as follows：220V alternating current power supplys one end passes through relay switch K1, relay coil（10）Constitute with diode D1, D2, D3, D4
Rectification circuit be connected, the anode of rectification circuit and one-way SCR T, negative electrode are connected, the trigger electrode and resistance R1 of controllable silicon T,
The mu balanced circuit and transformer of electric capacity C, diode D5 composition（11）Induction coil A be connected, transformer（11）Another sensing
One end of coil B passes through isolating transformer（12）Induction coil C, current-limiting resistance R2 be connected to the ground, carbon filament（7）It is connected to mutual inductance
Device（11）Coil B the other end on, isolating transformer（12）Another coil D be connected with relay K1, relay K1 with
220V alternating current power supplys are connected, and motor M is arranged in 220V alternating current power supplys by switching K2.
3. a kind of method for security protection of electric circular saw, it is characterised in that by earth leakage protective device and carbon filament install in the line, when
When carbon filament someone touches, producing electric leakage and shunting being produced in trouble point, this leakage current Jing human body groundings have in causing transformer
Electric current passes through, and another group of coil of transformer can produce induced voltage, when this magnitude of voltage reaches controllable silicon action magnitude of voltage, can
Control silicon conducting makes the actuating of relay, cuts off the electricity supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043882.3A CN106607974A (en) | 2017-01-21 | 2017-01-21 | Safety protection device for electric circular saw and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043882.3A CN106607974A (en) | 2017-01-21 | 2017-01-21 | Safety protection device for electric circular saw and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106607974A true CN106607974A (en) | 2017-05-03 |
Family
ID=58636192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710043882.3A Pending CN106607974A (en) | 2017-01-21 | 2017-01-21 | Safety protection device for electric circular saw and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106607974A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86206071U (en) * | 1986-08-15 | 1987-09-12 | 林忆秋 | Automatically protective switch for electric-leakage |
| CN87207394U (en) * | 1987-08-04 | 1988-04-27 | 福建省闽侯保安开关厂 | Leakage-curreut acting protector |
| CN1562586A (en) * | 2003-11-28 | 2005-01-12 | 肖杰明 | Cut-off shears |
| CN2777815Y (en) * | 2004-11-26 | 2006-05-03 | 钱加灿 | Dry combustion prevention leakage current action protector |
| CN200974268Y (en) * | 2006-11-01 | 2007-11-14 | 徐飞 | Circular carpentry sawing machine |
| CN203339658U (en) * | 2013-04-12 | 2013-12-11 | 海尔集团公司 | Electric leakage protection device |
| CN203831532U (en) * | 2014-05-15 | 2014-09-17 | 杨家友 | Bench saw safety device |
| CN105235017A (en) * | 2015-10-29 | 2016-01-13 | 河南理工大学 | Electric saw emergency braking control device |
| CN206436338U (en) * | 2017-01-21 | 2017-08-25 | 向奕铭 | A kind of safety guard of electric circular saw |
-
2017
- 2017-01-21 CN CN201710043882.3A patent/CN106607974A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86206071U (en) * | 1986-08-15 | 1987-09-12 | 林忆秋 | Automatically protective switch for electric-leakage |
| CN87207394U (en) * | 1987-08-04 | 1988-04-27 | 福建省闽侯保安开关厂 | Leakage-curreut acting protector |
| CN1562586A (en) * | 2003-11-28 | 2005-01-12 | 肖杰明 | Cut-off shears |
| CN2777815Y (en) * | 2004-11-26 | 2006-05-03 | 钱加灿 | Dry combustion prevention leakage current action protector |
| CN200974268Y (en) * | 2006-11-01 | 2007-11-14 | 徐飞 | Circular carpentry sawing machine |
| CN203339658U (en) * | 2013-04-12 | 2013-12-11 | 海尔集团公司 | Electric leakage protection device |
| CN203831532U (en) * | 2014-05-15 | 2014-09-17 | 杨家友 | Bench saw safety device |
| CN105235017A (en) * | 2015-10-29 | 2016-01-13 | 河南理工大学 | Electric saw emergency braking control device |
| CN206436338U (en) * | 2017-01-21 | 2017-08-25 | 向奕铭 | A kind of safety guard of electric circular saw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8943937B2 (en) | Power tool with circuit for sensing contact between an implement and an object | |
| US8336432B1 (en) | Safety system for machine tools | |
| CN206436338U (en) | A kind of safety guard of electric circular saw | |
| CN102699755A (en) | Security protection cover for numerical control cutting machine | |
| CN105846736A (en) | Wood working lathe control system | |
| CN102672526B (en) | Secondary power supply return circuit for numerical control sawing machine | |
| CN106607974A (en) | Safety protection device for electric circular saw and method thereof | |
| CN204094229U (en) | A kind of cutting machine | |
| US9519281B2 (en) | System and method for identification of contact between an object and a static implement in a power tool | |
| CN104289982A (en) | Intelligent grinding machine | |
| CN204068737U (en) | Airborne 270V/110KW high-power DC power supply | |
| US9575484B2 (en) | System and method for identification of contact between a human and a static implement in a power tool | |
| CN206010550U (en) | There are on a kind of gear-hobbing machine the cutter shaft driving means of defencive function | |
| CN207120098U (en) | A kind of mining stone cutting device | |
| CN203804354U (en) | Safe and environment-friendly linear cutting machine tool | |
| CN203104342U (en) | High-efficiency starting device being capable of effectively protecting motor windings | |
| CN208034879U (en) | A kind of safe band sawing machine of anti-cutting hand and its system | |
| CN205438799U (en) | Small -size carpentry sawing machine | |
| CN206030086U (en) | Multi -functional carpenter's flat plane saw | |
| CN205489515U (en) | Low pressure preventing arc umbrella | |
| CN202134887U (en) | Protector for three-phase non-contacting switch | |
| CN206136732U (en) | Special insulating tree ware of cutting of electric power | |
| CN204019369U (en) | Floor stand grinder | |
| CN204382439U (en) | A kind of slabber control system | |
| CN205792327U (en) | A kind of wood-turning machine control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170503 |
|
| RJ01 | Rejection of invention patent application after publication |