JPH01135410A - Bolt cutting machine - Google Patents
Bolt cutting machineInfo
- Publication number
- JPH01135410A JPH01135410A JP28777387A JP28777387A JPH01135410A JP H01135410 A JPH01135410 A JP H01135410A JP 28777387 A JP28777387 A JP 28777387A JP 28777387 A JP28777387 A JP 28777387A JP H01135410 A JPH01135410 A JP H01135410A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- cutting
- bolt
- stud
- continuous
- 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.)
- Granted
Links
- 238000010008 shearing Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 abstract description 7
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Shearing Machines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、全ねじボルトの切断に用いるボルト切ＩＦｒ
機の切断刃に関する。゛
〔従来の技術〕
従来、照明機器や空調設備等を天井から吊り下げ−る際
に、全ねじボルトが使用されるが、このボルトは定尺の
ため建築現場で使用する際、適当な長さに切断する必要
がある。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bolt cutting IFr used for cutting fully threaded bolts.
Regarding the cutting blade of the machine. [Conventional technology] Conventionally, fully threaded bolts are used when hanging lighting equipment, air conditioning equipment, etc. from the ceiling, but since these bolts are of a fixed length, when used at construction sites, it is necessary to adjust the bolts to an appropriate length. It is necessary to cut it.
ねじボルトと切断刃の関係を示す断面図、第５図ねじポ
ルｌ−，１０１はそのおねじ、１０１ａはその山の項、
１０１ｂはそのフランク、２，２′は上、下一対の切断
刃で、２は上部切断刃、２′は下部切断刃、２０１は切
断刃２．２′の端部に設けためねじで、全ねじボルト１
のおねじ１０１と同一のピッチである。２０１ａは表刃
部、２０１ｂは裏刃部、２０１ｃはめねじ２０１の山の
頂、２０１ｄはその谷底である。A sectional view showing the relationship between the screw bolt and the cutting blade, Figure 5. Screw pole l-, 101 is its male thread, 101a is its mountain term,
101b is the flank, 2 and 2' are a pair of upper and lower cutting blades, 2 is the upper cutting blade, 2' is the lower cutting blade, 201 is an internal thread provided at the end of the cutting blade 2.2', screw bolt 1
The pitch is the same as that of the external thread 101. 201a is the front blade part, 201b is the back blade part, 201c is the top of the female thread 201, and 201d is the bottom of the valley.
上記構成において、全ねじボルト１の切断時に ゛
は第４図に示すように、全ねじボルト１と上、下一対の
切断刃２．２′は螺合し、上部切断刃２の表刃部２０１
ａと下部切断刃２′の裏刃部２０１ｂが相互に向い合っ
た状態で剪断荷重により全ねじボルト１を切断する。In the above configuration, when cutting the fully threaded bolt 1, as shown in FIG. 201
The fully threaded bolt 1 is cut by a shearing load with the back blade portion 201b of the lower cutting blade 2' facing each other.
従来の切断刃２，２′のめねじ２０１の山の角度０１は
全ねじボルト１のおねじ１０１の山の角度０２と同じで
、例えばＷ３／８のねじの場合にはθ１＝０２＝５５°
で、切断時にねじボルト１は第５図に示す如く剪断荷重
により約６°傾く。The angle 01 of the threads of the female threads 201 of the conventional cutting blades 2, 2' is the same as the angle 02 of the threads of the male threads 101 of the fully threaded bolt 1. For example, in the case of a W3/8 thread, θ1=02=55 °
During cutting, the threaded bolt 1 is tilted by about 6 degrees due to the shearing load, as shown in FIG.
そのため、全ねしボルト１のねじ山は上部切断刃２の表
刃部２０１ａおよび下部切断刃２′の裏刃部２０１ｂと
当接し、ここに曲げ荷重が加わることになる。Therefore, the thread of the full-length bolt 1 comes into contact with the front blade part 201a of the upper cutting blade 2 and the back blade part 201b of the lower cutting blade 2', and a bending load is applied thereto.
上記の如く、全ねじボルト１のねじ山は切１祈時に５下
部切断刃２′の裏刃部２０１ｂと当接するが、その当接
箇所は山の頂２０１ｃ付近となり、ここに大きな曲げ荷
重がかかる。As mentioned above, the thread of the fully threaded bolt 1 comes into contact with the back blade part 201b of the lower cutting blade 2' during cutting, but the contact point is near the top 201c of the thread, and a large bending load is applied here. It takes.
しかし、裏刃部２０１ｂは不完全なねじ山のため曲げ荷
重により欠損のおそれがあり、またこれと当接する全ね
しボルト１のおねじ１０１のフランク１０１ｂにも圧痕
がつきやすく、そのためナツトが入りにくくなるといっ
た不具合が生ずるおそれがあった。However, since the back blade part 201b has an incomplete thread, there is a risk of breakage due to bending load, and the flank 101b of the male thread 101 of the full-thickness bolt 1 that comes into contact with this part is also likely to be dented, so that the nut cannot be tightened. There was a risk that problems such as difficulty in entering the device would occur.
本発明は、従来技術の欠点を解消し、切断刃の欠損や全
ねじボルトの圧痕を防止することができるボルト切断機
を得ることを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a bolt cutting machine that eliminates the drawbacks of the prior art and can prevent breakage of cutting blades and dents on fully threaded bolts.
本発明では、切断刃のめねじの山の角度を全ねじボルト
のおねじの山の角度より大きくしたことを特徴とする。The present invention is characterized in that the angle of the threads of the female thread of the cutting blade is made larger than the angle of the threads of the male thread of the fully threaded bolt.
本発明では、切断時に全ねじボルトが剪断荷重により傾
くが、その傾斜に対応して切断刃のめねじの山の角度を
全ねじボルトのおねじの山の角度より大きくしたので、
切断刃の裏刃部の山頂付近に加わる曲げ荷重を小さくす
ることができ、切断刃の欠損や全ねじボルトの圧痕を防
止することができる。In the present invention, the fully threaded bolt tilts due to shearing load during cutting, but the angle of the threads of the female thread of the cutting blade is made larger than the angle of the threads of the male thread of the fully threaded bolt to accommodate this inclination.
It is possible to reduce the bending load applied to the vicinity of the peak of the back blade portion of the cutting blade, and it is possible to prevent breakage of the cutting blade and impressions of fully threaded bolts.
以下、図面を参照して本発明の一実施例について説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
第２図は電動式のボルト切断機の外観を示す斜視図であ
る。図において、２．２′は上、下一対の切断刃、３は
モータ、４は歯車箱、５はクランク、６はアーム、７．
８はカッタホルダで、これに切断刃２．２′が取り付け
られている。９は吊り下げフック、１０はハンドル、１
１は切断刃２．２′をカッタホルダ７．８に固定するた
めのねじである。FIG. 2 is a perspective view showing the appearance of the electric bolt cutting machine. In the figure, 2.2' is a pair of upper and lower cutting blades, 3 is a motor, 4 is a gear box, 5 is a crank, 6 is an arm, 7.
8 is a cutter holder, to which a cutting blade 2.2' is attached. 9 is a hanging hook, 10 is a handle, 1
1 is a screw for fixing the cutting blade 2.2' to the cutter holder 7.8.
以下、その作動について説明する。The operation will be explained below.
モータ３の回転は歯車箱４内に配設された減速１炎構（
図示せず。）により減速された後５出力軸であるクラン
ク５に伝達され、アーム６を介してカッタホルダ７を揺
動運動させ、剪断荷重を加えて切断刃２．２′により全
ねじボルト１を切断する。The rotation of the motor 3 is controlled by a deceleration 1 flame structure (
Not shown. ) is then transmitted to the crank 5, which is the output shaft 5, to swing the cutter holder 7 through the arm 6, apply a shearing load, and cut the fully threaded bolt 1 with the cutting blade 2.2'.
所で、このボルト切断機の外観並びに機構は従来のもの
と同一であるが、本実施例では切断刃２．２′のねじ山
の構成が異なっている。Incidentally, although the appearance and mechanism of this bolt cutting machine are the same as those of the conventional bolt cutting machine, the structure of the thread of the cutting blade 2.2' is different in this embodiment.
以下、第１図の切断刃と全ねじポル１−のねじ山の関係
を示す断面図によりその構成を説明する。The structure will be explained below with reference to a sectional view showing the relationship between the cutting blade and the thread of the fully threaded pole 1- in FIG.
図において切断刃２．２′のめねじ２０１のピッチは全
ねじボルト１のおねじ１０１のピンチと同一であるが、
本実施例でめねじ２０１の山の角度θ□を７０°に設定
し、全ねじボルト１のおねじ１０１の山の角度５５°よ
り１５″大きくした。なお、この場合切断刃２，２′の
厚みはピッチの３．５倍とした。In the figure, the pitch of the female thread 201 of the cutting blade 2.2' is the same as the pinch of the male thread 101 of the fully threaded bolt 1;
In this embodiment, the thread angle θ□ of the female thread 201 is set to 70°, which is 15" larger than the thread angle 55° of the male thread 101 of the fully threaded bolt 1. In this case, the cutting blades 2, 2' The thickness was 3.5 times the pitch.
このようにしたので、全ねじボルト１のおねじ１０１の
山頂１０１ａ付近は下部切断刃２′のめねじ２０１の谷
底２０１ｃｌ付近で当接し、従来、下部切断刃２′の裏
刃部２０１ｂの山の頂２０１ｃ付近にかかっていた曲げ
荷重を軽減することができる。With this arrangement, the vicinity of the crest 101a of the male thread 101 of the fully threaded bolt 1 comes into contact with the vicinity of the root 201cl of the female thread 201 of the lower cutting blade 2'. The bending load applied to the vicinity of the top 201c can be reduced.
従って、本実施例によれば切断刃の欠損を防止し、その
長寿命化を図ることができる一方、全ねじボルト１に圧
痕が生ずる等の不具合を解消することができる。Therefore, according to this embodiment, it is possible to prevent the cutting blade from breaking and extend its lifespan, and at the same time, it is possible to eliminate problems such as the formation of impressions on the fully threaded bolt 1.
本発明によれば、従来技術の欠点を解消し、切断刃の欠
損や全ねじボルトの圧痕を防止することができるボルト
切断機を得ることができる。According to the present invention, it is possible to obtain a bolt cutting machine that eliminates the drawbacks of the prior art and can prevent breakage of cutting blades and impressions of fully threaded bolts.
第１図は本発明の一実施例に係る切断刃と金ね時におけ
る全ねじボルトと切断刃の関係を示す断１は全ねじボル
ト、１０１はおねじ、２，２′は切断刃、２０１はめね
じ、２０１ａは表刃部、２０１ｂは裏刃部、３はモータ
、４は歯車箱、５はクランク、６はアーム、７，８はカ
ッタホルダ特許出願人の名称 日立工機株式会社FIG. 1 shows the relationship between a fully threaded bolt and a cutting blade when a cutting blade and a metal screw are connected according to an embodiment of the present invention. Screw, 201a is the front blade part, 201b is the back blade part, 3 is the motor, 4 is the gear box, 5 is the crank, 6 is the arm, 7 and 8 are the cutter holder Name of patent applicant Hitachi Koki Co., Ltd.
Claims (1)
ねじが端部に形成された上、下一対の切断刃を有し、上
記おねじと上記めねじの螺合状態において、上記切断刃
に剪断荷重を加えて上記全ねじボルトを切断するように
したボルト切断機において、上記切断刃のめねじの山の
角度を上記全ねじボルトのおねじの山の角度より大きく
したことを特徴とするボルト切断機。(1) A female thread having the same pitch as the male thread of the fully threaded bolt has a pair of upper and lower cutting blades formed at the end, and when the male thread and the female thread are screwed together, the cutting blade A bolt cutting machine that cuts the fully threaded bolt by applying a shearing load to the blade, characterized in that the angle of the threads of the female thread of the cutting blade is larger than the angle of the threads of the male thread of the fully threaded bolt. Bolt cutting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28777387A JPH01135410A (en) | 1987-11-13 | 1987-11-13 | Bolt cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28777387A JPH01135410A (en) | 1987-11-13 | 1987-11-13 | Bolt cutting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135410A true JPH01135410A (en) | 1989-05-29 |
| JPH0516966B2 JPH0516966B2 (en) | 1993-03-05 |
Family
ID=17721563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28777387A Granted JPH01135410A (en) | 1987-11-13 | 1987-11-13 | Bolt cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01135410A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7020967B2 (en) | 2001-05-08 | 2006-04-04 | Kabushiki Kaisha Ogura | Rod cutting device |
| EP3006149A1 (en) * | 2014-10-10 | 2016-04-13 | Black & Decker, Inc. | Dies for threaded rod cutting machine |
| EP3222379A1 (en) * | 2016-03-23 | 2017-09-27 | Black & Decker Inc. | Dies for threaded rod cutting machine |
| US10092966B2 (en) | 2014-10-10 | 2018-10-09 | Black & Decker Inc. | Dies for threaded rod cutting machine |
| JP2021070094A (en) * | 2019-10-30 | 2021-05-06 | パナソニックＩｐマネジメント株式会社 | Cutting tool |
-
1987
- 1987-11-13 JP JP28777387A patent/JPH01135410A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7020967B2 (en) | 2001-05-08 | 2006-04-04 | Kabushiki Kaisha Ogura | Rod cutting device |
| EP3006149A1 (en) * | 2014-10-10 | 2016-04-13 | Black & Decker, Inc. | Dies for threaded rod cutting machine |
| US10092966B2 (en) | 2014-10-10 | 2018-10-09 | Black & Decker Inc. | Dies for threaded rod cutting machine |
| EP3222379A1 (en) * | 2016-03-23 | 2017-09-27 | Black & Decker Inc. | Dies for threaded rod cutting machine |
| JP2021070094A (en) * | 2019-10-30 | 2021-05-06 | パナソニックＩｐマネジメント株式会社 | Cutting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516966B2 (en) | 1993-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080305 Year of fee payment: 15 |