JP2007045082A - Tension adjusting mechanism of chain saw - Google Patents

Tension adjusting mechanism of chain saw Download PDF

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JP2007045082A
JP2007045082A JP2005233916A JP2005233916A JP2007045082A JP 2007045082 A JP2007045082 A JP 2007045082A JP 2005233916 A JP2005233916 A JP 2005233916A JP 2005233916 A JP2005233916 A JP 2005233916A JP 2007045082 A JP2007045082 A JP 2007045082A
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tension
gear
guide plate
saw chain
saw
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Toyoki Mimori
豊樹 三森
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Koki Holdings Co Ltd
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Hitachi Koki Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tension adjusting mechanism of a chain saw, which can stably adjust tension of a saw chain, while reducing its size and weight. <P>SOLUTION: This tension adjusting mechanism of the chain saw comprises a saw chain guide plate 8, a tension adjusting gear 2 wherein a cylindrical protrusion 3 is provided on one axial end surface, a tension suspension gear 4 which meshes with the gear 2 and wherein a cylindrical protrusion 5 is provided on one axial end surface, and a driving disc 11 which is rotated coaxially with the gear 4. The gears 2 and 4 are rotated by rotating the driving disc 11, so that the guide plate 8, the end of which partially abuts on a protrusion 3 provided on the gear 2, can be transferred. As soon as or immediately before the transfer of the guide plate 8 by the gear 2 is completed, the protrusion 5, which is provided on the gear 4, abuts on the other part of the end of the guide plate 8, so that the guide plate 8 can be further transferred. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、工具を用いることなくソーチェーンの張力を調整することができるチェーンソーの張力調整機構に関するものである。   The present invention relates to a chain saw tension adjusting mechanism capable of adjusting the tension of a saw chain without using a tool.

従来のチェーンソーには工具を用いることなくソーチェーンの張力調整が行えるものがあり、このようなチェーンソーにおいては、ソーチェーンの張力調整のための駆動盤の回転操作をソーチェーンガイドプレートの移送動作に変換するために、１つのギヤの回転面に設けられた突起を利用するか、１つのカム状の円盤の外周面を利用して移送の変位を発生させ、ソーチェーンに適当な張力を与えながらソーチェーンガイドプレートを固定する構成が採用されている（特許文献１参照）。
特許第２７２９５８２号公報 Some conventional chainsaws can adjust the tension of the saw chain without using a tool. In such chainsaws, the rotation operation of the drive panel for adjusting the tension of the saw chain is used to transfer the saw chain guide plate. In order to convert, while using the protrusion provided on the rotating surface of one gear or using the outer peripheral surface of one cam-shaped disc, the displacement of the transfer is generated and the appropriate tension is applied to the saw chain. The structure which fixes a saw chain guide plate is employ | adopted (refer patent document 1).
Japanese Patent No. 2729582

従来のチェーンソーにおけるソーチェーンの張力調整機構においては、１つの回転盤によってソーチェーンガイドプレートの移送動作と該ソーチェーンガイドプレートの固定動作を行わなければならないため、理論的に回転盤の直径距離以上の移送量を設定することができず、事実上、ソーチェーンガイドプレートの移送量が回転盤の半径距離程度に制限されてしまう。   In the conventional chain saw adjusting mechanism of the saw chain, since the operation of transferring the saw chain guide plate and the fixing operation of the saw chain guide plate must be performed by one rotating disk, theoretically it is more than the diameter distance of the rotating disk. The transfer amount of the saw chain guide plate is practically limited to the radial distance of the rotating disk.

従って、ソーチェーンガイドプレートの移送と固定を安定させるために必要十分な距離を事実上半径とした回転盤が必要となり、その回転盤が回転するため、移送距離方向以外に対してもその回転空間が必要となり、チェーンソー全体が大きくならざるを得ないという問題があった。   Accordingly, a rotating disk having a radius that is necessary and sufficient to stabilize the transfer and fixing of the saw chain guide plate is required, and the rotating disk rotates. There was a problem that the entire chainsaw had to be large.

本発明は上記問題に鑑みてなされたもので、その目的とする処は、小型・軽量化を図りつつ、ソーチェーンの安定した張力調整を行うことができるチェーンソーの張力調整機構を提供することにある。   The present invention has been made in view of the above problems, and an object thereof is to provide a chain saw tension adjusting mechanism capable of performing stable tension adjustment of a saw chain while achieving a reduction in size and weight. is there.

上記目的を達成するため、請求項１記載の発明は、ソーチェーンをガイドするソーチェーンガイドプレートと、軸方向一端面に円柱状の突起が設けられた張力調整ギヤと、該張力調整ギヤに噛合し且つ軸方向一端面に円柱状の突起が設けられた張力懸架ギヤと、該張力懸架ギヤと同軸回転する駆動盤を含んでチェーンソーの張力調整機構を構成し、前記駆動盤を回わして前記張力調整ギヤと前記張力張架ギヤを回転させ、張力調整ギヤに設けられた前記突起に端部の一部が当接する前記ソーチェーンガイドプレートを移送し、該張力調整ギヤでのソーチェーンガイドプレートの移送が終了すると同時又は直前に、前記張力懸架ギヤに設けられた突起がソーチェーンガイドプレートの端部の別の一部に当接して該ソーチェーンガイドプレートを更に移送することを特徴とする。   In order to achieve the above object, a first aspect of the present invention is directed to a saw chain guide plate for guiding a saw chain, a tension adjusting gear provided with a cylindrical protrusion on one end surface in the axial direction, and meshed with the tension adjusting gear. And a tension adjusting mechanism of a chain saw including a tension suspension gear provided with a cylindrical protrusion on one end face in the axial direction and a driving panel rotating coaxially with the tension suspension gear. The tension adjusting gear and the tension tensioning gear are rotated, and the saw chain guide plate whose part is in contact with the projection provided on the tension adjusting gear is transferred, and the saw chain guide plate at the tension adjusting gear is transferred. At the same time or immediately before the end of the transfer, the protrusion provided on the tension suspension gear comes into contact with another part of the end portion of the saw chain guide plate so that the saw chain guide plate is Characterized by transferring the.

請求項２記載の発明は、請求項１記載の発明において、前記張力懸架ギヤの中心を貫通するスクリューロッドを備えた固定座と前記駆動盤とをボルトによる締め付けによって固定することができる調整ノブを設け、該調整ノブを回転させて前記固定座と前記張力張架ギヤの圧接状態を解除した後に前記駆動盤を回して前記ソーチェーンガイドプレートを移送せしめることを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, there is provided an adjustment knob capable of fixing the fixing seat having a screw rod penetrating the center of the tension suspension gear and the driving panel by tightening with a bolt. And the adjusting knob is rotated to release the pressure contact state between the fixed seat and the tension tension gear, and then the drive plate is rotated to move the saw chain guide plate.

本発明によれば、ソーチェーンガイドプレートを張力調整ギヤと張力張架ギヤによって２段階で移送させることによってソーチェーンの張力調整量を拡大することができるため、小型・軽量化を図りつつ、ソーチェーンの安定した張力調整を行うことができる。   According to the present invention, since the amount of tension adjustment of the saw chain can be increased by transferring the saw chain guide plate in two stages by the tension adjusting gear and the tension tensioning gear, the saw chain can be reduced in size and weight while being reduced in size. Stable tension adjustment of the chain can be performed.

以下に本発明の実施の形態を図１〜図３に基づいて説明する。   Embodiments of the present invention will be described below with reference to FIGS.

図１は本発明に係るチェーンソー要部の分解斜視図、図２はチェーンソーの駆動盤の斜視図、図３（ａ）〜（ｅ）は本発明に係るチェーンソーにおけるソーチェーンガイドプレートの移送時系列動作図である。   1 is an exploded perspective view of a main part of a chain saw according to the present invention, FIG. 2 is a perspective view of a drive board of the chain saw, and FIGS. 3A to 3E are time series of transfer of a saw chain guide plate in the chain saw according to the present invention. FIG.

図１において、７は固定座であり、この固定座７には、スプロケット１と張力調整ギヤ２及び張力張架ギヤ４が回転自在に支持されている。   In FIG. 1, reference numeral 7 denotes a fixed seat, and the sprocket 1, the tension adjusting gear 2, and the tension tension gear 4 are rotatably supported on the fixed seat 7.

ここで、上記張力調整ギヤ２と張力張架ギヤ４とは互いに噛合しており、これらの軸方向一端面には円柱状の突起３，５がそれぞれ突設されている。又、固定座７にはスクリューロッド６が立設されており、このスクリューロッド６は、前記張力懸架ギヤ４の中心を貫通している。   Here, the tension adjusting gear 2 and the tension tension gear 4 are meshed with each other, and cylindrical projections 3 and 5 are respectively provided on one end face in the axial direction. A screw rod 6 is erected on the fixed seat 7, and this screw rod 6 passes through the center of the tension suspension gear 4.

８はソーチェーン９をガイドするためのソーチェーンガイドプレートであって、その一端には二股状を成す長短のアーム部８ａ，８ｂが形成されている。   Reference numeral 8 denotes a saw chain guide plate for guiding the saw chain 9, and long and short arm portions 8a and 8b are formed at one end of the saw chain guide plate.

１０はカバーであって、このカバー１０は、前記固定座７に固定されることによってスプロケット１と、張力調整ギヤ２及び張力張架ギヤ４と、ソーチェーン９及びソーチェーンガイド８の一部を覆う。   The cover 10 is fixed to the fixed seat 7 so that the sprocket 1, the tension adjusting gear 2, the tension tension gear 4, the saw chain 9 and a part of the saw chain guide 8 are fixed. cover.

１１は張力懸架ギヤ４と同軸回転する駆動盤であり、この駆動盤１１には、図２に示すように、張力張架ギヤ４に係合する回転係止部１４を備えている。   Reference numeral 11 denotes a drive panel that rotates coaxially with the tension suspension gear 4, and the drive panel 11 includes a rotation locking portion 14 that engages with the tension tension gear 4 as shown in FIG. 2.

１２は座金付六角ボルトであって、この座金付六角ボルト１２は、前記スクリューロッド６端部に螺合し、調整ノブ１３によって該座金付六角ボルト１２を回すことによって張力調整ギヤ４を固定座７に圧接し或は圧接状態を解除することができる。   Reference numeral 12 denotes a hexagon bolt with a washer. The hexagon bolt 12 with a washer is screwed into the end of the screw rod 6 and the hexagon bolt 12 with a washer is turned by an adjustment knob 13 to fix the tension adjusting gear 4 to a fixed seat. 7 can be pressed or released.

次に、本発明に係る張力調整機構によるソーチェーン９の張力調整要領を図３に基づいて説明する。   Next, the tension adjusting procedure of the saw chain 9 by the tension adjusting mechanism according to the present invention will be described with reference to FIG.

ソーチェーン９の張力調整に際しては、調整ノブ１３を回転させて固定座７と張力張架ギヤ４の圧接状態を解除した後に駆動盤１１を回す。   When adjusting the tension of the saw chain 9, the adjustment knob 13 is rotated to release the pressure contact state between the fixed seat 7 and the tension tension gear 4, and then the drive panel 11 is turned.

図３（ａ）に示す状態においては、張力調整ギヤ２に設けられた円柱状の突起３とソーチェーンガイドプレート８の長い側のアーム部８ａの端部とが当設している。回転盤１１によって張力懸架ギヤ４を矢印Ａ方向に回転させると、該張力懸架ギヤ４に噛合する張力調整ギヤ２は矢印Ｂ方向に回転し、この回転によって、張力調整ギヤ２の突起３に当接したソーチェーンガイドプレート８が図３（ｂ），（ｃ）に示すように矢印Ｃ方向へ移送される。   In the state shown in FIG. 3A, the columnar protrusion 3 provided on the tension adjusting gear 2 and the end of the long arm portion 8a of the saw chain guide plate 8 are in contact with each other. When the tension suspension gear 4 is rotated in the direction of arrow A by the turntable 11, the tension adjustment gear 2 meshing with the tension suspension gear 4 rotates in the direction of arrow B, and this rotation makes contact with the protrusion 3 of the tension adjustment gear 2. The saw chain guide plate 8 in contact is transferred in the direction of arrow C as shown in FIGS.

そして、図３（ｃ）に示すように、張力調整ギヤ２の突起３によるソーチェーンガイドプレート８の移送動作が終了する直前において、続いて張力懸架ギヤ４に設けられた突起５がソーチェーンガイドプレート８の短い側のアーム部８ｂの端部と当接し、駆動盤１１の回転によって、図３（ｃ），（ｄ）に示すように、引き続きソーチェーンガイドプレート８が矢印Ｃ方向へ移送され、図３（ｅ）に示す時点付近でソーチェーンガイドプレート８の移送動作が完了する。   Then, as shown in FIG. 3 (c), immediately before the transfer operation of the saw chain guide plate 8 by the protrusion 3 of the tension adjusting gear 2 is finished, the protrusion 5 provided on the tension suspension gear 4 continues to the saw chain guide. As shown in FIGS. 3 (c) and 3 (d), the saw chain guide plate 8 is continuously transferred in the direction of the arrow C as shown in FIGS. The transfer operation of the saw chain guide plate 8 is completed in the vicinity of the time point shown in FIG.

従って、本発明に係る張力調整機構によれば、ソーチェーンガイドプレート８の移送は張力調整ギヤ２と張力張架ギヤ４によって２段階になされるため、その移送量は１つの回転体の直径を超えることができる。このため、ソーチェーン９の張力を適正にするための必要十分なソーチェーンガイドプレート８の移送量を確保するための回転体の直径を短くすることができ、これにより、移送方向と直角をなす方向の回転空間距離を短くすることができる。この結果、チェーンソーの小型・軽量化を図りつつ、ソーチェーン９の安定した張力調整を行うことができる。   Therefore, according to the tension adjusting mechanism according to the present invention, the transfer of the saw chain guide plate 8 is performed in two stages by the tension adjusting gear 2 and the tension tensioning gear 4, so that the transfer amount is equal to the diameter of one rotating body. Can be exceeded. For this reason, it is possible to shorten the diameter of the rotating body for securing the necessary amount of transfer of the saw chain guide plate 8 for making the tension of the saw chain 9 appropriate, thereby making a right angle with the transfer direction. The rotational space distance in the direction can be shortened. As a result, the tension of the saw chain 9 can be stably adjusted while reducing the size and weight of the chain saw.

本発明に係るチェーンソー要部の分解斜視図である。It is a disassembled perspective view of the chain saw principal part which concerns on this invention. チェーンソーの駆動盤の斜視図である。It is a perspective view of the drive board of a chainsaw. （ａ）〜（ｅ）は本発明に係るチェーンソーにおけるソーチェーンガイドプレートの移送時系列動作図である。(A)-(e) is a time-sequential operation | movement figure of transfer of the saw chain guide plate in the chain saw which concerns on this invention.

符号の説明Explanation of symbols

１ スプロケット
２ 張力調整ギヤ
３ 円柱状突起
４ 張力懸架ギヤ
５ 円柱状突起
６ スクリューロッド
７ 固定座
８ ソーチェーンガイドプレート
９ ソーチェーン
１０ カバー
１１ 駆動盤
１２ 座金付六角ナット
１３ 調整ノブ
１４ 駆動盤の回転係止部 DESCRIPTION OF SYMBOLS 1 Sprocket 2 Tension adjustment gear 3 Cylindrical protrusion 4 Tension suspension gear 5 Cylindrical protrusion 6 Screw rod 7 Fixed seat 8 Saw chain guide plate 9 Saw chain 10 Cover 11 Drive panel 12 Hexagon nut with washer 13 Adjustment knob 14 Rotation of drive panel Locking part

Claims (2)

ソーチェーンをガイドするソーチェーンガイドプレートと、軸方向一端面に円柱状の突起が設けられた張力調整ギヤと、該張力調整ギヤに噛合し且つ軸方向一端面に円柱状の突起が設けられた張力懸架ギヤと、該張力懸架ギヤと同軸回転する駆動盤を備え、
前記駆動盤を回わして前記張力調整ギヤと前記張力張架ギヤを回転させ、張力調整ギヤに設けられた前記突起に端部の一部が当接する前記ソーチェーンガイドプレートを移送し、該張力調整ギヤでのソーチェーンガイドプレートの移送が終了すると同時又は直前に、前記張力懸架ギヤに設けられた突起がソーチェーンガイドプレートの端部の別の一部に当接して該ソーチェーンガイドプレートを更に移送することを特徴とするチェーンソーの張力調整機構。 A saw chain guide plate for guiding the saw chain, a tension adjusting gear provided with a cylindrical protrusion on one end face in the axial direction, and a cylindrical protrusion provided on one end face in the axial direction that meshes with the tension adjusting gear. A tension suspension gear and a drive panel that rotates coaxially with the tension suspension gear;
The tension control gear and the tension tension gear are rotated by rotating the drive board, and the saw chain guide plate whose part is in contact with the protrusion provided on the tension adjustment gear is transferred, and the tension is adjusted. At the same time or immediately before the transfer of the saw chain guide plate with the adjustment gear, the protrusion provided on the tension suspension gear comes into contact with another part of the end of the saw chain guide plate, and the saw chain guide plate is moved. A chain saw tension adjusting mechanism characterized by further transporting. 前記張力懸架ギヤの中心を貫通するスクリューロッドを備えた固定座と前記駆動盤とをボルトによる締め付けによって固定することができる調整ノブを設け、該調整ノブを回転させて前記固定座と前記張力張架ギヤの圧接状態を解除した後に前記駆動盤を回して前記ソーチェーンガイドプレートを移送せしめることを特徴とする請求項１記載のチェーンソーの張力調整機構。   An adjustment knob capable of fixing the fixed seat having a screw rod penetrating through the center of the tension suspension gear and the drive panel by bolting is provided, and the adjustment knob is rotated to rotate the fixed seat and the tension tension. 2. The chain saw tension adjusting mechanism according to claim 1, wherein the saw chain guide plate is moved by rotating the drive panel after releasing the pressure contact state of the rack gear.
JP2005233916A 2005-08-12 2005-08-12 Tension adjusting mechanism of chain saw Withdrawn JP2007045082A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102151902A (en) * 2011-03-03 2011-08-17 浙江亚特电器有限公司 Chain tension displaying structure for chain saw
CN102562976A (en) * 2012-01-06 2012-07-11 浙江亚特电器有限公司 Chain tensioning mechanism of lopper saw
US10882206B2 (en) 2015-08-18 2021-01-05 Black & Decker, Inc. Low profile chainsaw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102151902A (en) * 2011-03-03 2011-08-17 浙江亚特电器有限公司 Chain tension displaying structure for chain saw
CN102562976A (en) * 2012-01-06 2012-07-11 浙江亚特电器有限公司 Chain tensioning mechanism of lopper saw
US10882206B2 (en) 2015-08-18 2021-01-05 Black & Decker, Inc. Low profile chainsaw

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