FR2624780A1 - Device for tensioning a handsaw blade and for locking in position and the saw bow implementing the device - Google Patents

Device for tensioning a handsaw blade and for locking in position and the saw bow implementing the device Download PDF

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Publication number
FR2624780A1
FR2624780A1 FR8718456A FR8718456A FR2624780A1 FR 2624780 A1 FR2624780 A1 FR 2624780A1 FR 8718456 A FR8718456 A FR 8718456A FR 8718456 A FR8718456 A FR 8718456A FR 2624780 A1 FR2624780 A1 FR 2624780A1
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France
Prior art keywords
blade
lever
tensioning
axis
frame
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Granted
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FR8718456A
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French (fr)
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FR2624780B1 (en
Inventor
Hugues Seloron
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Seloron Ets
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Seloron Ets
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Priority to FR8718456A priority Critical patent/FR2624780B1/en
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Publication of FR2624780B1 publication Critical patent/FR2624780B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
    • B23D51/12—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools for use with tools, dealt with in this subclass, which are connected to a carrier at both ends, e.g. bows adjustable in length or height
    • B23D51/125—Blade tensioning means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

The bow comprises a shaped lever 6 arranged with a cam-shape 6-1 capable of coming to bear against then tilting onto the facing surface of the blade-carrying arm, the lever 6 being associated by means of its lower part 6-3 with the outer end of the bow of the member 3 for maintaining and tensioning the blade then locking it in position.

Description

L'invention a pour objet un dispositif de mise en tension de lame dune scie å main et de verrouillage en position et la monture de scie mettant en oeuvre le dispositif. The subject of the invention is a device for tensioning the blade of a hand saw and locking in position and the saw frame implementing the device.

On rappelle succintement que les scies à main comprennent une monture métallique associée a une forme profilée formant poignée de préhension, l'ensemble étant susceptible de recevoir d'une manière amovible des lames de scies. Après chaque changement de lame, soit après usure, soit en fonction de la qualité de la lame recherchée pour un travail particulier, il faut mettre en tension la lame. Celle-ci est généralement fixée å l'une des extrémités å un appendice formé à la partie inférieure de la poignée, tandis que l'autre extrémité est associée a un organe de retenue traversant l'extrémité profilée avant de la monture, ledit organe ayant une partie filetée pour recevoir un écrou a ailettes de serrage et de mise en tension. It will be recalled briefly that the hand saws comprise a metal frame associated with a profiled shape forming a grip handle, the assembly being capable of receiving saw blades in a removable manner. After each blade change, either after wear, or depending on the quality of the blade desired for a particular job, the blade must be tensioned. The latter is generally fixed at one end to an appendage formed at the lower part of the handle, while the other end is associated with a retaining member passing through the profiled front end of the frame, said member having a threaded part to receive a nut with tightening and tensioning fins.

L'utilisation de ces écrous a ailettes ne permet pas toujours des réglages de tension précis, l'écrou pouvant luimême se dévisser et modifier ainsi l'effort précité. En outres ce type d'écrou est disgracieux et ne permet pas un empilage des montures lors du stockage. En outre, lors du changement de lame, on perd la tension préétablie. The use of these wing nuts does not always allow precise tension adjustments, the nut being able to unscrew itself and thus modify the aforementioned force. In addition, this type of nut is unsightly and does not allow the frames to be stacked during storage. In addition, when changing the blade, the preset tension is lost.

On a proposé des systèmes de mise en tension diffé- rents en associant une poignée a lune des extrémités de la lame, ladite poignée venant en superposition de l'organe de pré- hension, donc située a l'arrière de la monture de scie. Un tel ensemble a été décrit dans le brevet 2.202.460. Il n'autorise pas cependant un réglage précis de la tension. Different tensioning systems have been proposed by associating a handle at one of the ends of the blade, said handle coming in superposition of the gripping member, therefore located at the rear of the saw frame. Such an assembly has been described in patent 2,202,460. However, it does not allow precise adjustment of the tension.

Le but recherché selon l'invention était de remédier å ces inconvénients. The aim sought after according to the invention was to remedy these drawbacks.

La solution apportée est simple, facile à mettre en oeuvre et offre une qualité de réglage très supérieure au matériel existant. The solution provided is simple, easy to implement and offers a quality of adjustment far superior to existing equipment.

Selon une première caractéristique, la monture com prend une levier agencé avec une forme en came susceptible de venir en contre-appui puis basculement sur la face en regard du bras porte-lame, le levier étant associé par sa partie inférieu- re à l'extrémité extérieure de la monture de l'organe de retenue et de mise en tension de la lame puis son verrouillage en position. According to a first characteristic, the frame com takes a lever arranged with a cam shape capable of coming into abutment then tilting on the opposite face of the blade-holder arm, the lever being associated by its part lower than the outer end of the mounting of the blade retaining and tensioning member then locking it in position.

Ces caractéristiques et d'autres encore ressortiror.t bien de la suite de la description. These characteristics and others will become apparent from the rest of the description.

Pour fixer l'objet de l'invention illustré d'une manitre non limitative aux figures des dessins où
- la figure t esc une vue de profil d'une monture de scie équipée du dispositif de mise en tension de l'invention,
- les figures 2 et 3 sont des vues partielles illustrant la mise en tension de la lame,
- la figure 4 est une vue en variante du dispositif de mise en tension.To fix the object of the invention illustrated with a non-limiting handle to the figures of the drawings where
- Figure t esc is a side view of a saw frame fitted with the tensioning device of the invention,
- Figures 2 and 3 are partial views illustrating the tensioning of the blade,
- Figure 4 is an alternative view of the tensioning device.

Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant d'une manière non limitative en se réfé- rant aux figures des dessins. In order to make the object of the invention more concrete, it will now be described in a nonlimiting manner with reference to the figures of the drawings.

La monture de scie comprend une poignée (1), profilée et réalisée en tout matériau approprié et comportant une ouverture Cl-i) pour le passage et préhension de la main de lSutili- sateur. Cette poignée revoit! selon un exemple de réalisation non limitatif, dans sa partie supérieure, un bras (2) porte-lame de grande longueur ayant la forme d'un L. L'extrémité (2-1) du bras est montée fixe sur la poignée de préhension en étant mai n- tenue par tous moyens de liaison appropriés. The saw frame comprises a handle (1), profiled and made of any suitable material and comprising an opening C1-i) for the passage and gripping of the hand of the user. This handle sees again! according to a nonlimiting exemplary embodiment, in its upper part, an arm (2) very long blade holder having the shape of an L. The end (2-1) of the arm is fixedly mounted on the grip handle by being maintained by all appropriate means of connection.

L'autre extrémité (2-2) présente une ouverture (2-3) transversale autorisant le passage d'un organe de retenue t3) et de mise en tension de la lame de scie (4). Celle-ci est à cet effet fixée à une extrémité (4-1) sur un appendice (5) formé å la base de la poignée (1) et recevant un plot ou doigt (5-1) s'engageant dans une ouverture (4-2) aménagée sur l'extrémité de la lame (4) en assurant une position fixe. L'autre extrémité (4 3) de la lame (4) est fixée sur un plot ou doigt (3-1) formée sur l'organe de retenue.Cet organe présente avantageusement une section (3-2) polygonale et carrée de préférence caté en dedans de la monture et une section caté extérieur å la monture agencée pour recevoir le dispositif de mise en tension de la lame. Le déplacement de l'organe (3) dans l'ouverture transversale de l'extrémité de la monture est limitée et suffit å la mise en tension de la lame. D'autres moyens équivalents peuvent Etre utilisés pour assurer la tenue de la lame de scie. En outre la forme du bras porte-lame peut être différente. The other end (2-2) has a transverse opening (2-3) allowing the passage of a retaining member t3) and tensioning the saw blade (4). This is for this purpose fixed at one end (4-1) to an appendage (5) formed at the base of the handle (1) and receiving a stud or finger (5-1) engaging in an opening ( 4-2) arranged on the end of the blade (4) ensuring a fixed position. The other end (4 3) of the blade (4) is fixed to a stud or finger (3-1) formed on the retaining member. This member advantageously has a polygonal and square section (3-2) preferably caté inside the frame and a caté section outside the frame arranged to receive the tensioning device of the blade. The movement of the member (3) in the transverse opening of the end of the frame is limited and sufficient for the tensioning of the blade. Other equivalent means can be used to ensure the holding of the saw blade. In addition, the shape of the blade arm may be different.

Selon l'invention, le dispositif de mise en tension comprend un levier (6) profilé agencé avec une forme en came (61) susceptible de venir en contre-appui puis basculement sur la forme en regard du bras porte-lame, le levier étant associé par sa partie inférieure a l'extrémité extérieure de la monture & BR< l'organe de retenue de mise en tension de la lame puis son verrouillage en position. According to the invention, the tensioning device comprises a profiled lever (6) arranged with a cam shape (61) capable of coming into abutment then tilting on the form facing the blade-holder arm, the lever being associated by its lower part to the outer end of the mount & BR <the tensioning retaining member of the blade then its locking in position.

Selon la première mise en oeuvre illustrée aux figures 1, 2 et 3, le levier (b) est de grande longueur et de section correspondant sensiblement å celle du bras porte-lame pour constituer une unité d'ensemble. Le levier est agencé dans sa partie inférieure avec une forme profilée formant came (6-1) avec en particulier une zone d'appui (6-2 > arrondie pour permettre le basculement du levier par rapport au point de contact sur le bras porte-lame.En outre, le levier est agencé en regard de sa partie formant came (6-1) et constituant une chape (6-3) d'articulation d'un appendice (7-1) formé en débordement exté- rieur d'un écrou (7) monté sur la partie cylindrique filetée (33) de l'organe de retenue (3). Un axe (8) sert de liaison entre le levier et l'écrou. Dans ce cas, l'axe (8) se trouve dans un plan déporté par rapport à l'axe longitudinal médian de l'organe de retenue et donc de la lame. According to the first implementation illustrated in Figures 1, 2 and 3, the lever (b) is very long and of section corresponding substantially to that of the blade holder arm to form an overall unit. The lever is arranged in its lower part with a profiled shape forming a cam (6-1) with in particular a support zone (6-2> rounded to allow the lever to tilt relative to the point of contact on the support arm blade. In addition, the lever is arranged opposite its cam-forming part (6-1) and constituting a yoke (6-3) of articulation of an appendage (7-1) formed in external overflow of a nut (7) mounted on the threaded cylindrical part (33) of the retaining member (3). An axis (8) serves as a connection between the lever and the nut. In this case, the axis (8) is located in a plane offset relative to the median longitudinal axis of the retaining member and therefore of the blade.

Le dispositif ainsi décrit permet d'assurer un pré- réglage en tension par la position de l'écrou sur l'organe (3) puis une mise en tension définitive et verrouillage en position par le basculement du levier par l'effet de came précité. On obtient ainsi une tension constante de la lame. Un autre avantage réside lors du changement de la lame. Il suffit en effet de déverrouiller le levier entravant la lame dans une position détendue et permettant son changement. On conserve toujours une m#me tension initiale de la lame. The device thus described makes it possible to ensure a pre-adjustment in tension by the position of the nut on the member (3) then a final tensioning and locking in position by the tilting of the lever by the aforementioned cam effect. . A constant tension of the blade is thus obtained. Another advantage is when changing the blade. It suffices to unlock the lever hindering the blade in a relaxed position and allowing it to be changed. We always keep the same initial tension of the blade.

Selon la seconde réalisation illustrée figure 4, l'axe dSarticul'ation du levier (9) peut se trouver dans le même plan et coïncider avec l'axe de l'organe de retenue (10). According to the second embodiment illustrated in Figure 4, the axis dSarticul'ation of the lever (9) can be in the same plane and coincide with the axis of the retaining member (10).

A cet effet, celui-ci est agencé du coté extérieur de la monture avec un taraudage intérieur (10-1) recevant å pré- réglage la partie cylindrique filetée d'un corps (il) montée entre les branches (12-1) formées å l'extrémité formant chape du levier (12). Celui-ci présente dans un plan sensiblement audessus de ses ailes (12-i) un profil en forme de came (12-23 avec zone d'appui arrondie ( correspondant a la fonction précédemment décrite dans la première réalisation. To this end, it is arranged on the outside of the frame with an internal thread (10-1) receiving, at pre-setting, the threaded cylindrical part of a body (it) mounted between the branches (12-1) formed. at the yoke end of the lever (12). This presents in a plane substantially above its wings (12-i) a cam-shaped profile (12-23 with rounded support area (corresponding to the function previously described in the first embodiment).

Cette mise en oeuvre est également simple, d'un faible coat de revient. Le vissage du corps (li) dans l'organe de retenue (10) permet un pré-réglage en tension, tandis que le levier confirme la mise en tension définitive puis le verrouillage en position. This implementation is also simple, with a low cost price. The screwing of the body (li) in the retaining member (10) allows a pre-adjustment in tension, while the lever confirms the final tensioning then the locking in position.

Le dispositif selon l'invention offre de nombreux avantages et ne nuit pas a l'esthétique de la monture de scie. The device according to the invention offers numerous advantages and does not harm the aesthetics of the saw frame.

Le dispositif de mise en tension de la lame de scie et son verrouillage en position peut s'appliquer à toute monture de scie agencée avec tous moyens appropriés de fixation de la lame, ceux indiqués dans la description l'étant à titre d'exemple illustratif.  The saw blade tensioning device and its locking in position can be applied to any saw frame arranged with any suitable means of fixing the blade, those indicated in the description being by way of illustrative example .

Claims (6)

REVENDICATIONS - 1 - Monture de scie à main comprenant des moyens de mise en tension de la lame, du type comprenant une poignée de préhension (1), un bras (2) porte-lame, un moyen å position fixe sur la base inférieure de la poignée recevant une extrémité de la lame, et un organe de retenue traversant l'extrémité avant du bras et agencé pour recevoir d'une part, l'autre extrémité de la lame du coté intérieur de la monture et d'autre part les moyens de mise en tension de la lame du c#té extérieur de la lame, caractérisée en ce qu'elle comprend un levier (6)(12) profilé.' agencé avec une forme en came (6-i) (12-2) susceptible de venir en contreappui puis basculement sur la face en regard du bras porte-lame, le levier (6-12) étant associé par sa partie inférieure < 6-3)(i2- 1) a l'extrémité extérieure de la monture de l'organe de retenue (3-1D) et de mise en tension de la lame puis son verrouillage en position.- 1 - Hand saw frame comprising means for tensioning the blade, of the type comprising a grip handle (1), an arm (2) blade holder, a fixed position means on the lower base of the handle receiving one end of the blade, and a retaining member passing through the front end of the arm and arranged to receive on the one hand, the other end of the blade on the inside of the frame and on the other hand the means of tensioning of the blade on the outer side of the blade, characterized in that it comprises a profiled lever (6) (12). arranged with a cam shape (6-i) (12-2) capable of coming into counter-support then tilting on the opposite face of the blade-holder arm, the lever (6-12) being associated by its lower part <6- 3) (i2-1) at the outer end of the mounting of the retaining member (3-1D) and of tensioning the blade then locking it in position. - 2 - Monture selon la revendication 1, caractérisée en ce que le levier (6 > (12) est de grande longueur et de section correspondant sensiblement à la section du bras porte-lame.- 2 - Frame according to claim 1, characterized in that the lever (6> (12) is of great length and section corresponding substantially to the section of the blade holder arm. - 3 - Monture selon l'une quelconque des revendications 1 et 2, caractérisée en ce que la forme en came (6-1)(12-2) du levier (6)(i2) présente une zone d'appui arrondie (6-2)(12-3). - 3 - Frame according to any one of claims 1 and 2, characterized in that the cam shape (6-1) (12-2) of the lever (6) (i2) has a rounded support area (6 -2) (12-3). - 4 - Monture selon l'une quelconque des revendications 1, 2 et 3, caractérisée en ce que le levier (6) est agencé en regard de sa partie formant came (6-1) en constituant une chape (6-3) d'articulation d'un appendice (7-1) formé en débordement ext*- rieur d'un écrou (7) monté sur la partie filetée (3-3) de l'organe de retenue, un axe (8) assurant leur liaison, l'axe d'articulation du levier (6) étant déporté par rapport à l'axe de l'organe de retenue. - 4 - Frame according to any one of claims 1, 2 and 3, characterized in that the lever (6) is arranged opposite its cam portion (6-1) constituting a yoke (6-3) d articulation of an appendage (7-1) formed in external overflow * - laughing of a nut (7) mounted on the threaded part (3-3) of the retaining member, an axis (8) ensuring their connection , the axis of articulation of the lever (6) being offset relative to the axis of the retaining member. - 5 - Monture selon l'une quelconque des revendications 1 2 et 3, caractérisée en ce que l'axe (9) d'articulation du levier (12) se trouve dans le même plan et coïncide avec l'axe de l'or- gane de retenue (10), celui-ci étant agencé du coté extérieur de la monture avec un taraudage intérieur (10-1) recevant à pr6- réglage la partie cylindrique filetée d'un corps (il) monté entre les branches (12-1) formées à l'extrémité formant chape du levier (12). - 5 - Frame according to any one of claims 1 2 and 3, characterized in that the axis (9) of articulation of the lever (12) is in the same plane and coincides with the axis of the gold - retaining gane (10), this being arranged on the external side of the frame with an internal thread (10-1) receiving at pr6- adjustment the cylindrical threaded part of a body (it) mounted between the branches (12 -1) formed at the yoke end of the lever (12). - 6 - Monture selon la revendication 5, caractérisée en ce que la forme en came (12-2) du levier se trouve dans un plan sensiblement supérieur aux ailes (12-1) formant chape. - 6 - Frame according to claim 5, characterized in that the cam shape (12-2) of the lever is in a plane substantially greater than the wings (12-1) forming a yoke.
FR8718456A 1987-12-22 1987-12-22 BLADE TENSIONING DEVICE OF A HAND SAW AND LOCKING IN POSITION AND SAW MOUNTING IMPLEMENTING THE DEVICE Expired - Lifetime FR2624780B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8718456A FR2624780B1 (en) 1987-12-22 1987-12-22 BLADE TENSIONING DEVICE OF A HAND SAW AND LOCKING IN POSITION AND SAW MOUNTING IMPLEMENTING THE DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8718456A FR2624780B1 (en) 1987-12-22 1987-12-22 BLADE TENSIONING DEVICE OF A HAND SAW AND LOCKING IN POSITION AND SAW MOUNTING IMPLEMENTING THE DEVICE

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FR2624780A1 true FR2624780A1 (en) 1989-06-23
FR2624780B1 FR2624780B1 (en) 1992-09-25

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2785218A1 (en) * 1998-11-04 2000-05-05 Seloron Outillage Selor Ets HAND SAW MOUNT WITH BLADE TENSIONING DEVICE
US6079109A (en) * 1996-10-10 2000-06-27 Sicfo Stanley S.A. Metal-cutting saw bow frame including a device for tensioning of the blade
GB2360735A (en) * 2000-02-15 2001-10-03 Lin Kun Meng Hacksaw frame with arcuate support rod
WO2008098264A1 (en) * 2007-02-12 2008-08-21 Arthur Zakarian Hacksaw
CN104339035A (en) * 2013-08-07 2015-02-11 苏州宝时得电动工具有限公司 Fretsaw accessory and swing type power tool using same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE396965A (en) *
FR2344365A1 (en) * 1976-03-19 1977-10-14 Goldenberg Sa Tensioner for hacksaw frame - has tension screw on top of handle to act through fulcrum and lever frame legs apart

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE396965A (en) *
FR2344365A1 (en) * 1976-03-19 1977-10-14 Goldenberg Sa Tensioner for hacksaw frame - has tension screw on top of handle to act through fulcrum and lever frame legs apart

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6079109A (en) * 1996-10-10 2000-06-27 Sicfo Stanley S.A. Metal-cutting saw bow frame including a device for tensioning of the blade
FR2785218A1 (en) * 1998-11-04 2000-05-05 Seloron Outillage Selor Ets HAND SAW MOUNT WITH BLADE TENSIONING DEVICE
EP1000693A1 (en) * 1998-11-04 2000-05-17 Etablissements Seloron - Outillage Selor(S.a.r.l.) Frame of hand-held hacksaw with saw blade tensioning device
GB2360735A (en) * 2000-02-15 2001-10-03 Lin Kun Meng Hacksaw frame with arcuate support rod
WO2008098264A1 (en) * 2007-02-12 2008-08-21 Arthur Zakarian Hacksaw
CN104339035A (en) * 2013-08-07 2015-02-11 苏州宝时得电动工具有限公司 Fretsaw accessory and swing type power tool using same

Also Published As

Publication number Publication date
FR2624780B1 (en) 1992-09-25

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