JPH0239902A - Safety cover opening and closing mechanism for bench cutter - Google Patents
Safety cover opening and closing mechanism for bench cutterInfo
- Publication number
- JPH0239902A JPH0239902A JP19123688A JP19123688A JPH0239902A JP H0239902 A JPH0239902 A JP H0239902A JP 19123688 A JP19123688 A JP 19123688A JP 19123688 A JP19123688 A JP 19123688A JP H0239902 A JPH0239902 A JP H0239902A
- Authority
- JP
- Japan
- Prior art keywords
- safety cover
- spring
- gear case
- saw blade
- turning moment
- 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
- 230000005484 gravity Effects 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Sawing (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はのこ刃軸を中心に回動する卓上切断機の安全カ
バー開閉機構に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a safety cover opening/closing mechanism for a table-top cutting machine that rotates around a saw blade shaft.
従来例を第５図により説明する。ハンドル９を押し下げ
ることにより、被削材２とセフティカバー１０が当接し
該セフティカバー１０が回動するが、安全１該セフティ
カバー１０の開放を防止するため、スプリング１１によ
り常に閉鎖側に加圧されている。このスプリング１１に
よる加圧力及び該セフティカバ−１０自重による回転モ
ーメントにより、被削材当接時に被削材とセフティカバ
ーの接触力は大となり該セフティカバーが開きにくくな
る点と、該セフティカバーの被削材接触面が滑らかな面
を持たない時など上記した加圧力及び回転モーメントに
より、被剛材に傷を付けやすいという欠点を有する。A conventional example will be explained with reference to FIG. By pushing down the handle 9, the workpiece 2 and the safety cover 10 come into contact and the safety cover 10 rotates, but in order to prevent the safety cover 10 from opening, the spring 11 always applies pressure to the closing side. has been done. Due to the pressing force of the spring 11 and the rotational moment due to the weight of the safety cover 10, the contact force between the workpiece and the safety cover increases when the workpiece comes into contact with the workpiece, making it difficult to open the safety cover, and the fact that the safety cover is covered with When the contact surface of the material to be cut does not have a smooth surface, the above-mentioned pressing force and rotational moment have a disadvantage in that the material to be stiffened is easily damaged.
本発明の目的は、上記した従来技術の欠点をなくし、セ
フティカバーの開閉を円滑に行なえるようにすることで
ある。An object of the present invention is to eliminate the above-described drawbacks of the prior art and to enable smooth opening and closing of a safety cover.
本発明は、引張りばねは伸長量により復元力が変化する
点に着目し、セフティカバー開閉時において、セフティ
カバー自重による回転モーメントが閉じ方向の時は引張
りばねで引上げ、セフティカバー自重による回転モーメ
ントが開き方向の時には引張りばねで引下げるよう、セ
フティカバー自重による回転モーメントの変化に対応し
て、常にセフティカバーが閉じる方向へ回転モーメント
が加えられ、さらに上記回転モーメントは極力小さくな
るように、セフティカバー、引張りばねの関係を工夫し
たものである。The present invention focuses on the fact that the restoring force of a tension spring changes depending on the amount of extension, and when the safety cover is opened or closed, when the rotational moment due to the safety cover's own weight is in the closing direction, the tension spring pulls it up, and the rotational moment due to the safety cover's own weight is When the safety cover is in the opening direction, it is pulled down by a tension spring, and in response to changes in rotational moment due to the safety cover's own weight, a rotational moment is always applied in the direction in which the safety cover closes.Furthermore, the safety cover is adjusted so that the rotational moment is as small as possible. , the relationship between the tension springs has been devised.
〔発明の実施例〕 本発明を第１．２．３．４図により説明する。[Embodiments of the invention] The present invention will be explained with reference to FIG. 1.2.3.4.
ベース１上面に被削材２を支持するフェンス３を固着し
、該ベース１後部にヒンジ４が保持されている。該ヒン
ジ４上端には、ヒンジシャフト５を支点とし前記ベース
１に対し揺動可能にモートル部を有するギヤケース６が
保持されている。該ギヤケース６には、のこ刃軸７を中
心としてのこ刃８が可回転に取り付けられ、前端部に被
削材切込み用ハンドル９が保持されている。前記のこ刃
８露出部を覆うセフティカバー１０が前記のこ刃軸７を
中心に回転可能に保持され、前記ギヤケース６のフック
掛穴（Ｇ）１２と該セフティカバー１０のフック掛穴（
Ｓ）１３に、引張りコイルばねであるスプリング１１が
保持されている。A fence 3 for supporting a workpiece 2 is fixed to the upper surface of a base 1, and a hinge 4 is held at the rear of the base 1. A gear case 6 having a motor portion is held at the upper end of the hinge 4 so as to be swingable relative to the base 1 using the hinge shaft 5 as a fulcrum. A saw blade 8 is rotatably attached to the gear case 6 around a saw blade shaft 7, and a handle 9 for cutting a workpiece material is held at the front end. A safety cover 10 covering the exposed portion of the saw blade 8 is rotatably held around the saw blade shaft 7, and is connected to a hook hole (G) 12 of the gear case 6 and a hook hole (G) of the safety cover 10.
A spring 11, which is a tension coil spring, is held at S)13.
上記構成において、ハンドル９を押し下げれば、被削材
２にセフティカバー１０が当接し、該セフティカバー１
０は上昇し回転を始める。上記した該セフティカバー１
０の回転を円滑に行なえるようにするためには、該セフ
ティカバ−１０自重による回転モーメントを極力小さく
するよう配慮すれば良いことになる。さらに考慮しなけ
ればならない点は、安全上前記セフティカバ−１０自重
による回転モーメントが、該セフティカバー開き方向に
転移しやすいギヤケース上限位置（被削材切込み用ハン
ドル９を下降させない位置）において、該セフティカバ
ー閉じ方向に回転モーメントが加わるようスプリング１
１の位置を設定する必要がある。In the above configuration, when the handle 9 is pushed down, the safety cover 10 comes into contact with the workpiece 2, and the safety cover 1
0 rises and starts rotating. The safety cover 1 mentioned above
In order to ensure smooth rotation of the safety cover 10, consideration should be given to minimizing the rotational moment due to the weight of the safety cover 10. Another point to consider is that for safety reasons, the rotational moment due to the weight of the safety cover 10 is likely to be transferred in the opening direction of the safety cover at the upper limit position of the gear case (the position where the handle 9 for cutting the workpiece material is not lowered). Spring 1 is installed so that rotational moment is applied in the cover closing direction.
It is necessary to set the position of 1.
第３．４図によりスプリング１１の作用を説明する。第
３図はギヤケース６上限位置での部分図であり、セフテ
ィカバー重心位置１１０を示しである。第４図は上記ギ
ヤケース上限位置におけるセフティカバー１０回転時の
前記セフティカバー重心位置１１０ （１１０ａ 〜１
１０ｄ）、スプリング１１荷重点（１３ａ〜１３ｄ）位
置関係を作図化したものであり、該セフティカバー重心
位置１１ａ、１１０ｂ、１１０ｃ、１１０ｃと該スプリ
ング１１荷重点１３ａ、１３ｂ、１３ｃ、１３ｄが対応
する。第４図でわかるように、前記セフティカバー１０
を上昇回転させた場合、該セフティカバー重心位置１１
０は、のこ刃軸７の真上に近寄ってくると、該セフティ
カバ−１０自重による回転モーメントは減少することか
ら、前記スプリング１１の伸長量を少なくし、該スプリ
ング１１による該セフティカバー上昇回転力も軽減させ
るよう配設させ、合成された該セフティカバー１０の回
転モーメントは常に該セフティカバー１０の閉じ方向と
なるようにする。さらにセフティカバー重心位置（１１
０ｃ位置）が該のこ刃軸７の真上に位置する付近から、
該スプリング１１による回転モーメントは該セフティカ
バー１０の閉じる方向に加わるよう配設されている。こ
れらにより該セフティカバー１０は小さい回転力で回転
することになり、被削材２と当接し該セフティカバー１
０が上昇する時も円滑に回転する。The action of the spring 11 will be explained with reference to FIG. 3.4. FIG. 3 is a partial view of the gear case 6 at the upper limit position, and shows the center of gravity position 110 of the safety cover. FIG. 4 shows the center of gravity position 110 (110a to 1) of the safety cover when the safety cover rotates 10 times at the upper limit position of the gear case.
10d) is a drawing of the positional relationship of the spring 11 load points (13a to 13d), and the safety cover center of gravity positions 11a, 110b, 110c, and 110c correspond to the spring 11 load points 13a, 13b, 13c, and 13d. . As shown in FIG. 4, the safety cover 10
When the safety cover is rotated upward, the center of gravity position of the safety cover 11
0, as the safety cover 10 approaches directly above the saw blade shaft 7, the rotational moment due to its own weight decreases, so the amount of extension of the spring 11 is reduced, and the upward rotation of the safety cover by the spring 11 is reduced. The rotational moment of the safety cover 10 is always in the closing direction of the safety cover 10, so that the force is also reduced. In addition, the safety cover center of gravity position (11
0c position) is located directly above the saw blade shaft 7,
The spring 11 is arranged so that the rotational moment is applied in the closing direction of the safety cover 10. Due to these, the safety cover 10 rotates with a small rotational force, comes into contact with the workpiece 2, and the safety cover 10 rotates with a small rotational force.
It rotates smoothly even when 0 is rising.
なお本発明のように引張りばねを使用するのではなく、
のこ刃軸中心に巻き込んだねじりコイルばねを使用して
も同様な効果が得られる。Note that instead of using a tension spring as in the present invention,
A similar effect can be obtained by using a torsion coil spring wound around the saw blade shaft.
本発明によれば、セフティカバー自重による回転モーメ
ントの軽減及びセフティカバーの開放防止が行なえるよ
うにしたため、セフティカバーの開閉は円滑に行なえる
点と、被削材当接時の接触圧力軽減により、被削材に傷
を付けにくいという実用１優れた効果が得られる。According to the present invention, since the rotational moment due to the weight of the safety cover can be reduced and the safety cover can be prevented from opening, the safety cover can be opened and closed smoothly, and the contact pressure when abutting the workpiece is reduced. , an excellent practical effect of not easily damaging the work material can be obtained.
第１図は本発明となる卓上切断機の安全カバー開閉機構
の一実施例を示す側面図、第２図は切断作業時の側面図
、第３図は安全カバ一部の部分拡大図、第４図は安全カ
バー回転時の説明図ミー４−１ｊｌ ５１［＋Ｊ 徒釆
ａ’ｌ Ｌ−７、’ｌ ／ｆ・１ ｋ ｅ ｔ−３ｂ
。
図において、１はベース、２は被削材、３はフェンス、
４はヒンジ、５はヒンジシャフト、６はギヤケース、７
はのこ刃軸、８はのこ刃、１０はセフティカバー、１１
はスプリングである。Fig. 1 is a side view showing an embodiment of the safety cover opening/closing mechanism of a table-top cutting machine according to the present invention, Fig. 2 is a side view during cutting work, Fig. 3 is a partial enlarged view of a part of the safety cover, Figure 4 is an explanatory diagram of when the safety cover is rotated.
. In the figure, 1 is the base, 2 is the work material, 3 is the fence,
4 is a hinge, 5 is a hinge shaft, 6 is a gear case, 7
saw blade shaft, 8 saw blade, 10 safety cover, 11
is a spring.
Claims (1)
に連結したヒンジ上方にヒンジシャフトを支点に揺動可
能にギヤケースを軸支し、該ギヤケースにモートル部、
のこ刃、のこ刃軸を中心に回動するセフティカバーを連
結し、ギヤケースを下方に揺動することにより、被削材
と該セフティカバーが当接し、該セフティカバーが開閉
する構造の卓上切断機において、前記セフティカバー自
重による回転モーメントを軽減するため、引張りばね等
で前記回転モーメントより小さい逆回転モーメントを与
え、かつ、該セフティカバー重心位置が前記のこ刃軸の
真上に移動する付近から、逆に該セフティカバーの開放
を防止のため、該セフティカバー自重による開放側モー
メントより大きい、引張りばね等による該セフティカバ
ー閉鎖側モーメントが加わるよう、前記ギヤケースと前
記セフティカバーに引張りばね等の弾性体を保持させ、
該セフティカバー回転力を小さくさせることを特徴とす
る卓上切断機の安全カバー開閉機構。A fence that supports the workpiece is fixed to the base, a gear case is pivotally supported above the hinge connected to the base so as to be able to swing around the hinge shaft, and the motor part is attached to the gear case.
A tabletop structure that connects the saw blade and a safety cover that rotates around the saw blade axis, and swings the gear case downward so that the workpiece comes into contact with the safety cover, and the safety cover opens and closes. In the cutting machine, in order to reduce the rotational moment due to the weight of the safety cover, a tension spring or the like is used to apply a reverse rotational moment smaller than the rotational moment, and the center of gravity of the safety cover is moved directly above the saw blade axis. In order to prevent the safety cover from opening from the vicinity, a tension spring or the like is installed on the gear case and the safety cover so that a tension spring or the like applies a closing moment to the safety cover that is larger than the opening moment due to the safety cover's own weight. hold the elastic body of
A safety cover opening/closing mechanism for a table-top cutting machine characterized by reducing the rotational force of the safety cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191236A JPH0751281B2 (en) | 1988-07-29 | 1988-07-29 | Safety cover opening / closing mechanism for tabletop cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191236A JPH0751281B2 (en) | 1988-07-29 | 1988-07-29 | Safety cover opening / closing mechanism for tabletop cutting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0239902A true JPH0239902A (en) | 1990-02-08 |
| JPH0751281B2 JPH0751281B2 (en) | 1995-06-05 |
Family
ID=16271166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63191236A Expired - Fee Related JPH0751281B2 (en) | 1988-07-29 | 1988-07-29 | Safety cover opening / closing mechanism for tabletop cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751281B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006329772A (en) * | 2005-05-25 | 2006-12-07 | Shinko Electric Ind Co Ltd | Power generation device and tire pressure warning system including power generation device |
-
1988
- 1988-07-29 JP JP63191236A patent/JPH0751281B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006329772A (en) * | 2005-05-25 | 2006-12-07 | Shinko Electric Ind Co Ltd | Power generation device and tire pressure warning system including power generation device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0751281B2 (en) | 1995-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3983997B2 (en) | Marnoco | |
| US6279442B1 (en) | Blade guard device for a sawing machine | |
| JPH0239902A (en) | Safety cover opening and closing mechanism for bench cutter | |
| JP2515266B2 (en) | Safety cover with black line alignment mechanism of tabletop cutting machine | |
| JP2596277Y2 (en) | Cutting machine | |
| JPH09281957A (en) | Opening / closing control device for keyboard lid | |
| JP2588333Y2 (en) | Safety cover rotating device for desktop cutting machine | |
| JPH01101726U (en) | ||
| JPH0543442B2 (en) | ||
| JP2616355B2 (en) | Retractable cup holder | |
| JPH04328045A (en) | Console box for automobile | |
| JPS5927915U (en) | Load cover sheet support frame structure | |
| JPH08238604A (en) | Safety cover of portable circular saw | |
| JP2889508B2 (en) | Rotary tool | |
| JPH1034431A (en) | Cutter | |
| JPH0511928Y2 (en) | ||
| JPS6023579Y2 (en) | electric valve device | |
| JPS5934548Y2 (en) | Bonnet opening holding rod on power working machines | |
| JPS6331237Y2 (en) | ||
| JPH0718944A (en) | Shock absorber for door | |
| JPS61163802A (en) | Circular saw device | |
| JPS6243844Y2 (en) | ||
| JPS6240513Y2 (en) | ||
| JPH0179775U (en) | ||
| JPH02235701A (en) | Auxiliary covering device of safety cover of desk cutter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |