JPH06206119A - Endless saw - Google Patents

Abstract

PURPOSE:To stabilize the fitting with a guide plate by constituting a plurality of unit saw small parts having each saw tooth part on a same plane and the saw body inside, to an endless saw by connecting both the edge parts to an endless saw by each pin, and specifying the dimension of the unit saw small part and the shape of the saw body. CONSTITUTION:A saw-toothed part 2A is formed outside in the radial direction on a same plane or in a same layer, and a plurality of unit saw small parts S2 having a saw body 2B inside are connected in an endless form by each pin 20 at both the edge parts, and the saw 2 of a portable sawing machine is constituted. Each unit saw small part S2 is constituted so that the length in the peripheral turning direction is set within a range over four pieces of saw teeth and less than 80 pieces of saw teeth, and the height of the shoulder from the top edge of the saw tooth to the top side of the saw body 2B is set to 25 mm or less, and the saw tooth width is set to 10 mm or less. The shape of the saw body 2B is set to the shape which is formed by extending the shape of the sectional surface in projection which is set for the fitting state with the lower edge part of the guide plate 10 of the saw machine in fundamental, within the range of the length in the peripheral turning direction.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a saw small portion in which a sawtooth portion is formed on the same plane or in the same layer on the outer side in the radial direction and a saw blade is formed on the inner side. S2) relates to a ring-shaped endless saw in which a pin is connected in a chain shape. (Problems to be Solved by the Invention) FIGS. 1 and 2 show an embodiment of a saw machine equipped with an endless saw of the present invention, which is one of the constituent elements, when the intended use is portable. . The outline of the configuration of this portable saw machine will be described below to clarify the outer shape of the endless saw of the present invention and the required functions. The frame body, on which other components are arranged or attached and which serves as a base body, has a gate-like shape in which the head is connected with the lower part opened. In this embodiment, for portable use, a portion connecting the heads of the front and rear legs of the frame body is formed to have a thickness suitable for being held by a hand to form a handle portion. The endless saw is a small part of the saw that is the forming unit (S2).
Are connected by pins (2p) to form a chain, and a sawtooth portion is formed on the same plane or in the same layer on the outer side in the radial direction, and a saw blade is formed on the inner side. However, the present invention is limited to the case where it is classified as a convex shape as a whole even if it is slightly deformed. A total of four suspension pulleys for suspending the endless saw are arranged on the upper and lower parts of the front and rear pedestal portions on the same vertical surface or in the same vertical layer that longitudinally crosses the frame body. An electric motor is housed inside the rear pedestal, and the endless saw circulates between the suspension pulleys and on the suspension pulley by the rotation of the suspension pulley arranged above the rear pedestal connected to the electric motor. The tensioning mechanism that gives tension to the endless saw is composed of a suspension pulley, a screw shaft with a butterfly head, a feed nut, and the like arranged on the upper part of the front leg post. The cutting action is performed by running an endless saw exposed between the lower ends of the front and rear pedestal parts, which is the cutting action line region,
Above the endless saw exposed in the cutting action line area, with the plate surface standing vertically, the plate thickness is the same as the saw tooth width of the endless saw,
Alternatively, a guide plate (guide bar) that is thinner and has both ends joined to the lower part of the front and rear pedestals is installed. The lower end of this guide plate has a shape that fits with the saw blade of an endless saw, or a portion obtained by adding a part of the saw tooth portion to it, that is, if the cross section of the saw blade of an endless saw has a concave shape, If the shape of the cross section is formed in a convex shape, and the shape of the cross section of the saw blade is a convex shape like the endless saw of the present invention, the shape of the cross section is formed in a concave shape, and the cutting action line area It prevents the endless saw running in the direction from escaping upward due to cutting resistance, and lateral runout. FIGS. 3 and 4 show an example of the form of fitting the endless saw and the guide plate of the present invention. And on the left side of the endless saw exposed in the cutting action line area, a plate-shaped base with the plate surface facing up and down is arranged, and between the plate-shaped base and the frame body, the guide vertical axis,
An elevating guide mechanism composed of a sliding sleeve, two links, a torsion coil spring, etc. is provided, and the machine body is placed on the material to be cut with the lower surface of the plate-shaped base in contact with the upper surface of the material to be cut. After that, by manually pushing down the handle part of the frame body and starting the cutting work, the vertical movable part composed of the frame body, suspension pulley, electric motor, tension mechanism, endless saw, etc. is lowered and cut. After the work is completed, the vertically movable portion is again guided to move upward to return to the original position. As a portable device, the saw machine having an endless saw of the present invention as one of the constituent elements is configured as described above, and the operation and movement of the endless saw in this saw machine will be described in practice. Then, the tension of the endless saw is given to a considerable degree in order to accurately transmit the rotation of the suspension pulley set for driving and for the endless saw to perform the cutting action against the cutting resistance. . The strongly tensioned endless saw runs straight between the suspension pulleys at high speed and makes a curved turn on the suspension pulleys.
The direction in which the endless saw bends between and on the suspension pulley is the direction from the tooth tip of the saw blade to the top of the saw blade, and the bending angle is when bending in a curved shape on the suspension pulley. ,
Especially, it becomes a steep angle. In other words, an endless saw bends the saw blade between the suspension pulleys in a straight line in the vertical direction, and the saw blade vertically bends on the suspension pulley in a curved line according to the curvature of the outer circumference of the suspension pulley. The curving curving rotation makes anti-double motion at high speed under strong tension. Then, this saw machine (for portable use) performs the cutting work while the machine body is placed at a fixed position during the cutting work, and the endless saw and the guide plate are fitted to each other to form the endless saw. By controlling the escape of the saw upwards and the lateral runout, it is possible to realize precise dimension cutting and a smooth cutting surface.
That is the main purpose of this saw machine. In response to such a condition, the endless saw of the present invention has the chain shape connected by the pin (2p), so that the bending angle is easy on the suspension pulley or between the suspension pulleys. It folds and turns circularly. However, as an inside out of the gain of easily bending in a chain shape, for example, even when looking at what is called a chainsaw, the mechanism is generally complicated and an error occurs, and the purpose of use of this saw machine is It doesn't quite match. The present invention, as one of the components of this saw machine, more reliably maintains the form of fitting with the guide plate to meet the purpose of use, and also has a chain-like ring shape with less vibration and blurring. Aim to get an endless saw. (Means for Solving the Problem) In order to achieve the above object, the present invention provides a saw small portion (S2), which is a chain-shaped and ring-shaped endless saw forming unit, having a sawtooth length in the circumferential direction. Within the range of 4 or more and 80 or less, the height of the spine from the tip of the saw blade to the top side (face) of the saw blade is 25 mm or less, and the saw tooth width of the saw blade is 10 mm or less. And The saw blade of the block-shaped saw small portion (S2) or a portion obtained by adding a part of the saw tooth portion is basically a convex shape set in the form of fitting with the guide plate. The shape of a similar cross section is extended in the orbiting direction, and the line segment connecting the top edge (face) of the saw blade and the tip of the saw blade is parallel to the orbiting direction, or even if it is not parallel, it is large in the orbiting direction. The shape should not intersect at an angle. When the saw teeth have a single row in the circumferential direction, the number of saw teeth of the block-shaped small saw portion (S2) is 8 or more, and the length in the circumferential direction is 8 or more.
The sawtooth number within the range of 0 or less is applied as it is to be 4 or more and 80 or less. In the case of a double row, 8 is the minimum number. Further, the length in the circumferential direction is reduced when the size of a single saw tooth is reduced in order to obtain a smooth cutting surface, which is one of the purposes of the saw machine to which the endless saw of the present invention is attached. More than 4 saw teeth, 80
It will be shortened within the range of less than the number of pieces, on the other hand, for example, when scaling up an endless saw as a whole in response to the enlargement of the saw machine, it is usually as a single saw tooth. The size will be increased, the number of teeth will be increased, and the length will be extended. In addition, a small block-shaped saw (S2)
The saw blade has a cross-sectional shape that is designed to fit with the lower end of the guide plate and has the shape of a cross section that is linearly stretched in the circumferential direction. (surface)
All or part of the can be shaped to bend radially outward. The curvature that bends the saw blade outward in the radial direction is such that the lower end of the guide plate that fits with the saw blade of the endless saw gradually expands downward from the front and rear ends toward the center. In the case of an endless saw traveling in the cutting action line area, absorbing the "looseness" that expands closer to the center of the saw, and making the degree of fitting uniform over the entire cutting action line area, It may be matched or approximated to the downwardly bulging curvature of the lower end of the guide plate, and separately, matched or approximated to the curvature of the outer circumference of the suspension pulley. It can be Then, all or a part of the back surface and both side surfaces of the saw blade of the block-shaped saw small portion (S2), or by changing the expression, a surface that can be said to be in contact with the outer periphery of the suspension pulley is smooth. Not a surface, but a continuous surface of unevenness with high and low amplitudes that is not so great, and the continuous unevenness meshes with the teeth formed on the outer circumference of the suspension pulley for driving or other suspension pulleys. And a tooth space. The saw teeth at both ends of the block-shaped saw small portion (S2) or at one of the front and rear ends of the traveling direction of the endless saw are formed smaller than a predetermined saw tooth, or adjacent to the saw tooth formed smaller. The saw teeth may be successively increased in size so as to reach a predetermined saw tooth size. (Function) The saw small portion (S2), which is a chain-shaped and ring-shaped endless saw forming unit, is fitted to the lower end of the guide plate in a cross-sectional shape that is set in the circumferential direction. The length of the saw blade is extended within the range of 4 to 80 saw teeth to give a length (distance). And the ratio of vertical and vertical shake. Further, as the length (distance) of the block-shaped saw small portion (S2) is further extended within the range, the back surface and both side surfaces of the saw blade and the lower end surface of the lower end portion of the guide plate come closer to and contact with each other. Expand the area to
Reduce the ratio of vertical and vertical shake. Then, the saw blade of the block-shaped saw small portion (S2) is shaped so that all or part of its top side (face) is bent outward in the radial direction, and the curvature of the bend is When the lower end of the guide plate is inflated gradually downward from the front and rear ends toward the center, it matches or approximates the curvature of the lower end inflated, Compared with the case where the block-shaped saw small portion (S2) is linear in the circumferential direction, the area of approaching and contacting the lower end surface of the guide plate on the back surface and both side surfaces of the saw blade is enlarged, and the curved portion When the curvature is equal to or approximate to the curvature of the outer circumference of the suspension pulley, the bending pressure on the suspension pulley is eliminated when the block-shaped saw small portion (S2) is linear in the circumferential direction. Decrease or decrease. Then, the block-shaped saw small portion (S
When the unevenness having no large amplitude or pitch is continuously formed on all or a part of the back surface and both side surfaces of the saw blade of 2), the back surface and both sides of the saw blade of the block-shaped saw small portion (S2) are formed. The frictional resistance of the surface is increased to prevent slippage with the outer peripheral surface of the suspension pulley, and the continuous unevenness is used as teeth and tooth grooves to form teeth on the outer periphery of the suspension pulley, especially the suspension pulley for driving. By meshing, the suspension pulley and endless saw slip are completely eliminated,
The rotation of the electric motor is accurately transmitted to the endless saw. Then, the saw teeth at both ends or one end of the block-shaped saw small portion (S2) are formed smaller than a predetermined saw tooth, or the adjacent saw teeth are sequentially enlarged from the formed saw teeth to obtain a predetermined saw tooth size. When it is formed so as to reach, the cutting resistance of both ends or one end of the block-shaped saw small portion (S2) is reduced, and the endless saw having the pin (2p) in the cutting action line region as the center of rotation is formed. Partial fold,
Alternatively, the lift that is partially disengaged from the fitting form of the lower end of the guide plate is suppressed to a lower extent. (Example) An example will be described with reference to the drawings.
The embodiment shown in FIGS. 6 and 7 has a block-shaped saw small portion (S
The length in the circling direction of 2) was made to correspond to about 10 saw teeth, and the shape of the cross section set when the saw blade was fitted with the lower end portion of the guide plate was linearly stretched as it was. Shape,
The sawtooth portion also has a linear shape in the circumferential direction following the saw blade. In the embodiment shown in FIG. 8, the block-shaped saw small portion (S
The saw blade of 2) is shaped so that the entire saw blade, including the top side (face), is bent outward in the radial direction, and the curvature of the bend is shown in FIG. When the lower end of the is inflated gradually downward from the front and rear ends toward the center, it shall match the downwardly inflated curvature, and the sawtooth part also follows the saw blade and radiates in the radial direction. The shape is curved outward. The embodiment shown in FIG. 9 has a saw blade having a linear shape in the circumferential direction of a block-shaped saw small portion (S2).
From the both ends of the small saw portion (S2), go from the top of the saw blade (S2) to the center of the saw blade so that a part of the top edge (face) of the saw blade is bent outward. When the bottom of the guide plate has a shape that gradually expands downward from the front and rear ends toward the center, the curvature of the bottom surface of the guide plate expands gradually. And a sawtooth portion is formed in a linear shape in the circumferential direction following the saw blade. In the embodiment shown in FIG. 11, the saw blade of the block-shaped saw small portion (S2) is radiated so that the entire saw blade including the top side (face) thereof matches the curvature of the outer circumference of the suspension pulley. The shape is bent outward in the radial direction, and the sawtooth portion is also shaped like a saw blade and curved outward in the radial direction with the same curvature. The embodiment shown in FIG. 12 is a saw body in which a block-shaped saw small portion (S2) has a linear shape in the circumferential direction, and a part of its top side (face) is bent outward in the radial direction. As seen from the both ends of the small saw portion (S2), the notch is gradually deepened from the top side (plane) of the center of the suspension to the center of the center, and the curvature of the bottom surface of the saw pulley is set to the outer circumference of the suspension pulley. Excised part that matches the curvature (B1j)
The sawtooth portion has a linear shape in the circumferential direction following the saw blade. In the embodiment shown in FIG. 13, the saw blade of the block-shaped saw small portion (S2) is radiated so that the entire saw blade including the top side (face) thereof matches the curvature of the outer circumference of the suspension pulley. Bend outwards in the direction, and on the back and a part of both sides that contact the outer circumference of the bent saw blade suspension pulley,
Concavities and convexities that reduce both the amplitude and the pitch are continuously formed. In the embodiment shown in FIG. 14, the suspension pulley is provided on the back surface and both side surfaces of the saw blade of the block-shaped saw small portion (S2) curved outward in the radial direction so as to match the curvature of the outer circumference of the suspension pulley. Teeth and tooth spaces that mesh with the teeth formed on the outer circumference of the. In the embodiment shown in FIG. 15, both the sawtooth portion and the saw blade of the block-shaped saw small portion (S2) are linear in the circumferential direction, and the sawteeth at both ends of the sawtooth portion are formed smaller than a predetermined sawtooth. The saw tooth adjacent to the small saw tooth is formed in the size of a process up to a predetermined saw tooth size. (Effect of the Invention) By forming the saw small portion (S2), which is a chain-shaped and ring-shaped endless saw forming unit, into a block shape in which a length (distance) is given within a certain range in the circumferential direction, By reducing the ratio of the horizontal (horizontal) and vertical (vertical) runouts to the length (distance) and area per piece, it is possible to reduce vibration and shake during the cutting action of an endless saw. By giving length (distance) and area to the part (S2), the saw blade of the endless saw and the lower end of the guide plate are fitted securely, and the endless saw travels in the cutting action line range. Can be stabilized, and the cutting action of the endless saw can be made smooth. The purpose of the saw machine to which the endless saw of the present invention is attached is to reduce the vibration and shake of the endless saw, stabilize the traveling in the cutting action line region, and make the cutting action smooth. It will play a major role in achieving precise dimension cutting and achieving a smooth cutting surface. Then, the saw blade of the block-shaped saw small portion (S2) is shaped so that all or part of its top side (face) is bent outward in the radial direction, and the curvature of the bend is When the lower end of the guide plate is inflated gradually downward from the front and rear ends toward the center, it matches the curvature of the lower end of the inflated bottom, or approximates it badly. And, in that case, it is possible to ensure the form of fitting between the saw blade of the endless saw and the lower end of the guide plate, and
By setting the curvature of the curved line to be equal to or close to the curvature of the outer circumference of the suspension pulley, the curved rotation of the endless saw suspension pulley can be made smooth.
Then, on the entire back surface and both side surfaces of the saw blade of the block-shaped saw small portion (S2) or on a part thereof, concavo-convex with a small amplitude or pitch is continuously formed
Or, by using the continuous irregularities as teeth and tooth grooves to mesh with the teeth formed on the outer periphery of the suspension pulley, especially the suspension pulley for driving, the slip between the endless saw and the suspension pulley is suppressed or eliminated, and cutting It is possible to prevent a decrease in the operation efficiency. Further, the saw teeth at both ends or one end of the block-shaped saw small portion (S2) are formed smaller than a predetermined saw tooth, or adjacent saw teeth are sequentially enlarged from the formed saw teeth to obtain a predetermined saw tooth size. By forming so as to reach, the endless saw can be provided with a smooth and stable cutting action in the cutting action line region.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a left side view of one embodiment of a portable saw machine including an endless saw of the present invention as one of its constituent elements. FIG. 2 shows AA of FIG.
FIG. FIG. 3 is an enlarged view of a part of FIG. 1 for explaining a mode of fitting the endless saw and the guide plate of the present invention,
FIG. 4 is a sectional view taken along line BB in which FIG. 3 is further enlarged and partly omitted. FIG. 5 is a view for explaining the division of the back surface, both side surfaces, and the radially outward facing surface forming the outer surface of the saw blade of the endless saw of the present invention. 6th, 8th, 9th, 11th, 12th, 1st
3, 14 and 15 are views showing an embodiment of an endless saw of the present invention. FIG. 7 is a plan view of FIG. FIG. 10 is an explanatory view of a case where the lower end of the guide plate is inflated gradually downward from the front and rear ends toward the center. 1 ... Frame body, 1a ... Front pedestal of frame body, 1
b ... rear column of frame body, 1c ... handle of frame body, 2 ... endless saw, 2A ... saw tooth, 2B ... saw blade, 3 ... suspension pulley, 3a ... suspension pulley Axis of rotation,
4 ... Electric motor, 5 ... Operation switch, 6 ... Plate-shaped base, 7 ... Lift guide mechanism, 7a ... Guide vertical shaft, 7b
...... Sliding sleeve, 7c ...... Support plate, 7d, 7e ...... Link, 7f ...... Torsion coil spring, 7g ...... Pin, 7h
…… Storing drum, 8 …… Partition plate, 9 …… Tension mechanism, 9a
...... Screw shaft with butterfly head, 9b ...... Feed nut, 10 ...... Guide plate, W1 …… Saw blade rear surface, W2 …… Saw blade side surface, W3…
… Surface that faces outward in the radial direction. 5. Appendix Regarding the words and phrases relating to the endless saw used in this specification, the meaning range is set below. Boundary surface: A single surface that joins the bottom or bottom of the sawteeth of an endless saw, or the bottom point. Sawtooth portion: A portion radially outward from the boundary surface of an endless saw. Saw blade ............ Inward in the radial direction from the boundary surface of the endless saw. The top of the saw blade ... The innermost portion of the saw blade divided into 15 equal parts in the radial direction. The back of the saw blade ... The outer surface of the top of the saw blade. Side surface of the saw blade ... side surface of the saw blade except the top. Top of saw blade… The innermost side (face) of the saw blade in the radial direction. (Surface) On the back of the saw blade ... Distance from the boundary surface to the top edge (face) of the saw blade. Height The bottom of the saw blade ... The portion that divides the saw blade into two equal parts at the height of the back, and that extends outward in the radial direction. Sawtooth bottom point: The point (side) where the rake and flank faces of the sawtooth contact the boundary (side) plane. Predetermined saw tooth: A saw tooth that has the tallest height among the saw teeth, is the main body of the cutting action, and has a basic shape before being deformed.

Claims (1)

(1) A saw tooth portion (2A) is formed on the same surface or in the same layer on the outer side in the radial direction, and a saw blade (2B) is formed on the inner side, thereby forming a small saw unit. The part (S2) is a ring-shaped endless saw (2) whose both ends are connected to each other by a pin (2p) in a chain shape, and the saw small part (S2) has a length of four saw teeth in the circumferential direction. As described above, the height of the spine from the tip of the saw blade to the top side (face) of the saw blade (2B) is 25 mm or less and the saw tooth width of the saw tooth portion (2A) is 10 mm or less within a range corresponding to 80 or less. The shape of the saw blade (2B) is similar to the convex shape set in the form of fitting with the lower end of the guide plate (10) basically within the range of the length in the circumferential direction. As the shape of the cross section is extended in the circumferential direction, the line segment connecting the top side (face) of the saw blade (2B) and the tip of the saw tooth is the circumference. An endless saw (2) characterized by a block shape that does not intersect the turning direction at a large angle. (2) Saw blade (2B) of block-shaped saw small portion (S2)
, Except that the whole is linear in the orbital direction,
The endless saw (2) according to claim 1, wherein all or part of its top side (face) is shaped to bend outward in the radial direction. (3) Saw blade (2B) of block-shaped saw small portion (S2)
Is shaped so that all or part of its apex (face) bends outward in the radial direction, and the curvature of the bend is
When the lower end of the guide plate (10) is inflated downward from the front and rear ends toward the center, the curvature of the lower end of the inflated guide plate (10) An endless saw (2) according to claims 1 and 2 which is matched or approximated. (4) Saw blade (2B) of block-shaped saw small portion (S2)
Is shaped so that all or part of its apex (face) bends outward in the radial direction, and the curvature of the bend is
Endless saw (2) according to claims 1 and 2, matching or approximating the curvature of the outer circumference of the suspension pulley (3). (5) The concavo-convex pattern in which the height amplitude is not so large is continuously formed on all or part of the back surface and both side surfaces of the saw blade (2B) of the block-shaped saw small portion (S2). Endless saw (2). (6) On the back surface and both side surfaces of the saw blade (2B) of the block-shaped saw small portion (S2), or a part thereof, continuous unevenness of high and low amplitude is formed for driving. The endless saw (2) according to claim 1 or 5, wherein the suspension pulley (3) or the other suspension pulley (3) is a tooth and a tooth groove that mesh with teeth formed on the outer periphery of the suspension pulley (3). (7) The saw teeth at both ends of the block-shaped saw small portion (S2) or the saw teeth at one end are formed smaller than the predetermined saw teeth, or the adjacent saw teeth are sequentially enlarged from the formed saw teeth to a predetermined saw tooth. The endless saw (2) according to claim 1, which is formed so as to reach the size of the saw tooth.