JP2005144796A - Foldable saw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foldable saw capable of being housed in a state that a saw edge is folded in a handle part, characterized in that the handle part and the saw edge are locked and capable of regulating the angle formed by the handle part and the saw edge to an arbitrary angle. <P>SOLUTION: The saw edge 71, an attaching/detaching lever 51, a guide element 21 and the handle part 81 are attached to a saw edge operation body 11 and a rotary element 31 and a feed rod 41 are attached to the guide element 21 while a moving shaft 541 and a locking pin 531 are mounted on the attaching/detaching lever 51. The rotation of the rotary element 31 is converted to the linear movement of the moving shaft 541 connected to the feed rod 41 and the linear movement of the locking pin 531 and the saw edge 71 is rotated by the locking pin 531 to regulate the angle formed by the saw edge 71 and the handle part 81. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a folding saw that can be stored in a state in which a saw blade is folded into a handle, and the angle formed by the handle and the saw blade can be adjusted to an arbitrary angle. .

  As shown in FIG. 6, the conventional folding saw is a folding saw configured so that the saw blade can be folded to the handle side, and a back metal 4 for holding the saw blade 3 at the tip of the handle 2, or The saw blade is attached in a rotatable state, and a back metal 4 or a support tool 5 that supports the rear portion of the saw blade is disposed, and the back metal 4 with respect to the handle 2 is moved by moving the moving element 8 in the support tool 5. Or the structure of the saw pattern comprised so that the arrangement | positioning angle of a saw blade can be adjusted arbitrarily is disclosed (for example, refer patent document 1).

  As shown in FIG. 7, a back metal 3 for holding the saw blade 7 is attached to a distal end portion of a long handle 2 formed to be freely stretchable and a plurality of recesses are formed in the back metal 3. 8 is formed, and the rotation state of the back metal 3 can be locked in stages by engaging the tip of the fixture 6 attached to the back metal holding part 4 with the recess 8 formed in the back metal 3. And a saw that can change the angle of the saw blade with respect to the handle stepwise (see, for example, Patent Document 2).

  Further, as shown in FIG. 8, the pressing lever 14 has a front lower half portion including the fulcrum 15 c divided into two, and an engagement pin 17 c is provided between the side plates 2 and 2. On the other hand, a semicircular cutout 18c is provided on the back edge side of the rear end portion of the saw blade 3, and the saw blade 3 rotates about the support shaft 6 so as to be substantially straight with respect to the handle portion 1. When the pulled-out usage state is taken, the pressing lever 14 is biased by the leaf spring 16c, and the engaging pin 17c is engaged and fixed to the notch 18c. When the saw blade 3 is folded, the pressing lever 14 is pressed against the leaf spring 16c to release the engagement between the notch 18c of the saw blade 3 and the engagement pin 17c of the press lever 14, so that the saw blade 3 is centered on the support shaft 6. A method for fixing a saw blade of a replaceable blade type folding saw that is rotated and accommodated in a gap between both side plates 2 and 2 of the handle 1 is disclosed (for example, see Patent Document 3).

Japanese Patent Laid-Open No. 2002-96304 (Claim 1, FIG. 3 on page 3 and FIG. 3) JP-A-10-67001 (Claim 1, second column, line 49 to third column, first line and page 3, page 4) Japanese Patent Laid-Open No. 7-237201 (column 4, lines 18 to 30 and page 4, FIG. 1 (A))

  However, in Patent Document 1, which is a conventional folding saw, when performing tree pruning work or the like, if the angle of fixing of the saw blade is changed depending on the position of the branch to be cut, the operator can operate in an easy posture and efficiency. Even if the work can be performed well, even if the sharpness of the saw blade has fallen, the fixed angle of the saw blade can be set arbitrarily, so by slightly bending the saw blade and making the cutting angle, Effects such as improving the cutting ability of the saw blade and reducing the burden on the operator can be expected (see Patent Document 1, column 3, “Effects of the Invention”). However, in Patent Document 1, the fixed angle of the saw blade with respect to the handle can be arbitrarily set. However, since the saw blade is not fixed and can rotate freely in the folding direction, Since there is a possibility that the saw blade is folded by the momentum of cutting after the cutting, there is a problem of giving the worker a sense of safety. Further, the member that adjusts the angle in the folding direction to finish one operation and adjusts the angle between the saw blade and the saw blade even if the angle is adjusted to the opposite side to the folding direction for the next operation. There is a problem that it is difficult to recognize the folding angle because it is not linked to the movable element.

In Patent Document 2, the angle of the saw blade with respect to the handle can be changed in a stepwise manner, so that the cutting work can be efficiently performed in a state corresponding to the work situation (Patent Document 2, column 2, “Effect of the Invention”). Since the saw blade can be locked in stages, the problem of the folding saw disclosed in Patent Document 1 is solved. However, in Patent Document 2, the angle of the saw blade can be changed stepwise, but it cannot be changed steplessly to an arbitrary angle. When changing the angle, it is necessary to engage the tip of the fixture with the recess. However, since it is necessary to perform the above-mentioned operation with a saw blade as a blade, there is a problem that sufficient safety against injury or the like is not guaranteed.
Furthermore, in Patent Document 3, the pressing lever is urged by a leaf spring around the fulcrum, and the engaging pin of the pressing lever is engaged and fixed in the notch of the saw blade. There was a problem that it was not possible to change steplessly arbitrarily.

In the present invention, the saw blade operating body 11 is formed with a saw blade mounting portion 17, a detachable lever mounting portion 15, a guide tool mounting portion 12 and a handle mounting portion 18, and the saw blade 71 rotates on the saw blade mounting portion 17. The handle portion 81 that is mounted freely and is housed by folding the saw blade 71 in a folding groove 83 formed in the handle portion 81 is fixed to the handle attaching portion 18, and a guide tool is attached to the guide tool attaching portion 12. 21 is fixed, and a feed rod 41 is screwed into a rotary tool 31 in a state of being loosely inserted into a rotary notch 23 formed in the guide tool 21, and a moving shaft mounting hole 44 is formed in the feed rod 41. The attaching / detaching lever attaching portion 15 is formed with a guide elongated hole 16 and a mounting notch 153, and the moving shaft 541 is loosened to the moving shaft attaching hole 44 of the feed rod 41 in the moving shaft hole 54 of the attaching / detaching lever 51. It is attached to the guide slot 16 while being inserted, The locking pin 531 is locked in the locking pin hole 53 of the attaching / detaching lever 51, and the locking pin 531 is loosely inserted into the wearing notch 153, and the rotation of the rotating tool 31 is coupled with the feed bar 41. An angle formed between the saw blade 71 and the handle portion 81 is converted into a linear movement of the moving shaft 541 connected and a linear movement of the locking pin 531, and the saw blade 71 is rotated by the locking pin 531. The above-mentioned problem is solved by providing a folding saw characterized in that it is adjustable.
Further, the locking pin 531 for locking the saw blade 71 and the handle portion 81 and the locking groove 73 formed in the saw blade 71 are provided, the saw blade operating body 11 and the detachable lever 51. The above problem is solved by providing a folding saw characterized in that an angle display 61 indicating the angle formed by the saw blade 71 and the handle portion 81 is provided.

  In the folding saw of the present invention, since the saw blade 71 and the handle portion 81 are integrated via the saw blade operating body 11, even when the folding saw is used for tree pruning work or the like, There is no possibility that the saw blade 71 is folded by the momentum of cutting after cutting of the branches and the like. Furthermore, since the locking pin 531 linearly moves in both the front end side 907 and the rear end side 908 depending on the direction of rotation of the rotating tool 31, it can be changed steplessly to an arbitrary saw blade angle, Since the operation when changing the rotation is performed only by the rotation of the rotary tool 31, it is not necessary to carry it with the saw blade 71, which is a cutting tool, so that the sufficient safety against injury or the like is ensured. That is, even when one operation is finished and the angle is adjusted for the next operation, the rotation angle of the rotary tool 31 and the rotation of the saw blade 71 are linked, so that the recognition of the folding angle can be confirmed visually. Therefore, the effect that it can be used conveniently can be expected.

The configuration and operation of the main part of the folding saw having the function of adjusting the angle of the saw blade 71 with respect to the handle portion 81 of the present invention steplessly and fixing the saw blade 71 will be described.
The basic configuration of the folding saw is that all other components are attached to the saw blade operation body 11 constituting the folding saw. In other words, the saw blade operating body 11 is provided with a handle mounting portion 18, a guide tool mounting portion 12, a detachable lever mounting portion 15, and a saw blade mounting portion 17.
The handle portion 81 is fixed by the handle mounting hole 184 of the handle mounting portion 18. The guide tool 21 is fixed by the guide tool mounting hole 124 of the guide tool mounting portion 12. A cylindrical part 22 for loosely inserting the male thread part 43 of the feed bar 41 is formed in the guide tool 21, and the rotary tool 31 is inserted into a rotary notch 23 formed in the longitudinal center of the cylindrical part 22. Then, the internal thread portion 34 of the rotating tool 31 and the external thread portion 43 of the feed bar 41 are screwed in and attached. A push seat 42 is formed at the center of the feed bar 41, and a moving shaft mounting hole 44 is formed at the distal end 907.

  The attachment / detachment lever 51 is attached by inserting the movement shaft 541 into the guide slot 16 of the attachment / detachment lever attachment portion 15, the movement shaft attachment hole 44 of the feed rod 41 and the movement shaft hole 54 of the attachment / detachment lever 51. The locking pin 531 is fitted into the retaining pin hole 53 and attached. Therefore, the locking pin 531 is loosely inserted into the wearing notch 153 of the detachable lever mounting portion 15. A leaf spring 563 is attached between the slot 55 of the detachable lever 51 and the pressing seat 42 of the feed bar 41. The saw blade 71 is rotatably mounted through the saw blade mounting hole 174 of the saw blade mounting portion 17.

  The operation of the folding saw of the present invention converts the rotation of the rotary tool 31 into linear movement of the moving shaft 541 connected to the feed bar 41 and linear movement of the locking pin 531, and the saw blade 71 is moved by the locking pin 531. The angle between the saw blade 71 and the handle portion 81 is adjusted by being rotated. That is, since the locking pin 531 linearly moves in both the front end side 907 and the rear end side 908 depending on the direction of rotation of the rotating tool 31, it can be changed steplessly to an arbitrary saw blade angle, Since the operation when changing the rotation is performed only by the rotation of the rotary tool 31, it is not necessary to carry it with the saw blade 71, which is a cutting tool, so that the sufficient safety against injury or the like is ensured. be able to. Furthermore, even when one operation is finished and the angle is adjusted for the next operation, the rotation angle of the rotary tool 31 and the rotation of the saw blade 71 are linked, so that the recognition of the folding angle can be confirmed visually. Therefore, the effect that it can be used conveniently can also be expected.

As shown in FIG. 1, main components of the folding saw of the present invention are a saw blade operating body 11, a guide tool 21, a rotating tool 31, a feed bar 41, a detachable lever 51, a saw blade 71, and a handle portion 81. is there.
The saw blade operating body 11 is a substantially rectangular steel plate composed of a right operating body plate 111 and a left operating body plate 112, and the right operating body plate 111 and the left operating body plate 112 are overlapped on the rear end side 908. The central portion is stepped left and right toward the front end side 907 to form a gap 113, and the right operation body plate 111 and the left operation body plate 112 are brought into contact with each other at the front end side 907. It has a shape. Further, as shown in FIG. 2, the saw blade operating body 11 has a handle mounting portion 18, a guide tool mounting portion 12, a detachable lever mounting portion 15, a saw blade mounting in order from the rear end side 908 to the front end side 907. The part 17 is formed on both the right operation body plate 111 and the left operation body plate 112. A handle attachment hole 184 is penetrated through the handle attachment portion 18, a notch 121 is provided in the guide implement attachment portion 12, and a guide implement attachment hole 124 is penetrated therethrough. The detachable lever mounting portion 15 is provided with a guide right elongated hole 165 and a guide left elongated hole 166 and a mounting notch 153 is provided. A saw blade mounting hole 174 is formed in the saw blade mounting portion 17.

  As shown in FIG. 1, the guide 21 is provided with a cylindrical portion 22 formed by bending a central portion of a rectangular steel plate into a cylindrical shape, and a rotation notch 23 is provided at the central portion of the cylindrical portion 22. The mounting hole 24 is penetrated. The rotating tool 31 is a metal thick cylinder, and an internal thread portion 33 is threaded on the inner periphery, and the outer periphery is knurled. The feed rod 41 is threaded with a male threaded portion 45 in order from the rear end side 908 to the front end side 907 to form a flat pressing seat 42, and the moving shaft mounting hole 44 penetrates in a direction parallel to the pressing seat 42. Has been.

  As shown in FIG. 1, the detachable lever 51 is formed by plastic molding, generally in the shape of a square groove upside down, and has a shape having both side surfaces and an upper surface. 54 and the locking pin hole 53 are formed in a penetrating manner, and a spring slot 56 is formed inside the upper surface. The saw blade 71 is provided with a blade mounting hole 74 at a lower position in the direction of the rear end 908, a sliding portion 72 formed of a circumferential portion is formed at a back position on the upper portion of the blade mounting hole 74, and a bottom portion is circumferential. The locking groove 73 is cut out. The handle portion 81 is made of wood, an attachment hole for attaching the handle portion 81 to the saw blade operating body 11 with the attachment 185 is drilled, and the folding groove 83 is grooved.

The assembly of each member of the folding saw of the present invention will be described.
As shown in FIGS. 2 and 3, the handle portion 81 and the saw blade 71 are assembled to the handle attachment hole 184 of the saw blade operation body 11 as shown in FIGS. 2 and 3. The saw blade 71 is attached to the saw blade attachment hole 174 of the saw blade operation body 11 and the blade attachment hole 74 of the saw blade 71 by the saw blade attachment tool 741.
Subsequently, the guide tool 21, the rotating tool 31, the feed rod 41, and the detachable lever 51 are assembled to the saw blade operating body 11.
First, as shown in FIG. 1, the rotating tool 31 and the feed bar 41 are assembled to the guide tool 21 by the male screw portion 43 of the feed bar 41 inserted into the cylindrical portion 22 of the guide tool 21. This is performed by being screwed into the female thread portion 33 of the rotary tool 31 that is loosely inserted into the rotary notch 23. As shown in FIG. 1, the guide tool 21 to which the rotary tool 31 and the feed rod 41 are attached is inserted into the gap 113 of the saw blade operating body 11 to guide the guide tool mounting hole 124 of the saw blade operating body 11 and the guide. It is fixed using the mounting hole 24 of the tool 21. As shown in FIG. 1 and FIG. 2, first, a locking pin 531 is held in the locking pin hole 53 of the mounting / dismounting lever 51, and a leaf spring 563 is inserted into the spring groove hole 56. The moving shaft 541 passes through the moving shaft mounting hole 44, the guide right long hole 165, and the guide left long hole 166 of the feed rod 41, which is loosely inserted into the gap 113 of the saw blade operating body 11, and is attached to the moving shaft hole 54. The

  3 and 4A, the operation of the folding saw of the present invention will first be described from the state in which the saw blade 71 is folded to the state in which the saw blade 71 is attached to the detachable lever 51. Is rotated around the saw blade attachment 741 in the direction of the saw blade open side 972, the locking pin 531 slides against the sliding portion 72 against the urging force of the leaf spring 563, and the detachable lever 51 is moved. Rotates about the moving shaft 541 as the center of rotation, the tip side rises, the locking pin 531 engages with the locking groove 73, and the saw blade 71 is attached to the saw blade operating body 11. Since the saw blade 71 and the handle portion 81 are integrated through the saw blade operating body 11 by the above attachment, the tree branch is also used when the main folding saw is used for tree pruning work or the like. Thus, there is no possibility that the saw blade 71 is folded due to the momentum of cutting after cutting, etc., and there is an effect that the operator is not worried about safety.

Subsequently, the adjustment of the angle formed by the saw blade 71 and the handle portion 81 is performed as shown in FIG. 4B, since the moving shaft 541 and the locking pin 531 are fixed to the detachable lever 51. The distance from the pin 531 is constant and does not change, the urging force of the leaf spring 563 prevents the locking pin 531 from escaping from the locking groove 73, and the saw blade 71 can be rotated freely. Since it is attached by the attachment tool 741, when the rotation tool 31 is rotated so that the feed bar 41 moves linearly in the direction of the distal end 907, the movement axis fitted in the movement axis attachment hole 44 of the feed bar 41. 541 linearly moves in the direction of the distal end 907 inside the guide right elongated hole 165 and the guide left elongated hole 166 of the saw blade operating body 11, the locking pin also moves linearly in the same manner, and the locking pin 531 moves in the locking groove. 73 is moved linearly in the direction of the tip 907, the saw 71 is able to adjust the angle between the saw blade 71 and the handle portion 81 to rotate the saw blade closed side 971 direction. Further, when the rotating tool 31 is rotated so that the feed bar 41 moves linearly in the rear end side 908 direction, the moving shaft 541 fitted in the moving shaft mounting hole 44 of the feed bar 41 moves in the rear end side 908 direction. When the locking pin 531 linearly moves in the locking groove 73 in the direction of the rear end 908, the saw blade 71 rotates in the saw blade opening side 972 direction and the saw blade 71 moves in a straight line. It is also possible to adjust the angle formed by the handle portion 81.
Accordingly, the angle between the saw blade 71 and the handle portion 81 can be adjusted to an arbitrary angle by rotating the saw blade 71 in the saw blade closing side 971 direction and the saw blade opening side 972 direction by the left and right rotation of the rotating tool 31. Therefore, since it is not necessary to touch the saw blade 71 for adjusting the angle, an effect that the safety of the user is ensured can be expected.

  Further, when the handle 81 of the saw blade 71 is housed in the folding groove 83, as shown in FIG. 4C, the pressing lever 52 of the mounting / dismounting lever 51 is pushed downward against the urging force of the leaf spring 563. 51 rotates about the moving shaft 541 as the center of rotation, so that the locking pin 531 escapes upward from the locking groove 73 of the saw blade 71 and the saw blade 71 is not affected by the sliding portion 72. Since it can rotate around in the direction of the saw blade closing side 971, the back portion of the saw blade 71 is pushed and the saw blade 71 is rotated and stored in the folding groove 83.

  In the folding saw of the present invention, as the rotating tool 31 rotates, the detachable lever 51 moves linearly in conjunction with the linear movement of the moving shaft 541 and the locking pin 531, as shown in FIG. By engraving the angle display 61 on the saw blade operating body 11 and the detachable lever 51, the angle formed by the saw blade 71 and the handle portion 81 can be easily recognized. Further, in the present embodiment, the leaf spring 563 is used. However, as shown in FIG. 5B, there is no problem even if a coil spring 523 is used between the pressing portion 52 of the detachable lever 51 and the pressing seat 42. .

It is the enlarged front view (a) of the principal part of the folding saw which concerns on this invention, and a partial cross section expansion right side explanatory drawing (b). It is a right view showing the whole folding saw concerning the present invention. It is an expansion right side view showing the saw blade operation body 11 of the folding saw according to the present invention. It is a figure showing operation | movement of the folding saw which concerns on this invention, Comprising: It is a partially abbreviated explanatory drawing when the handle | pattern part 81 and the saw blade 71 are in a straight line. It is a figure showing operation | movement of the folding saw which concerns on this invention, Comprising: It is a partially abbreviated explanatory drawing when the handle | pattern part 81 and the saw blade 71 made | formed the arbitrary opening angles. It is a figure showing operation | movement of the folding saw which concerns on this invention, Comprising: It is a partially abbreviated explanatory drawing when pushing the attachment-and-detachment lever 51 into the state which can fold the saw blade 71. FIG. It is a partially omitted enlarged explanatory view (a) showing an angle display 61 of a folding saw according to the present invention and a partially omitted enlarged explanatory view (b) showing a usage form of a coil spring 523. It is explanatory drawing which shows the structure of a saw handle in the conventional folding saw. It is explanatory drawing which shows the structure which hold | maintains a saw blade in the conventional saw in steps. It is explanatory drawing which shows the notch and engagement pin of a saw blade in the conventional replaceable blade type folding saw.

Explanation of symbols

11 saw blade operation body 111 right saw blade operation body plate 112 left saw blade operation body plate 113 gap 12 guide tool mounting portion 121 notch 124 guide tool mounting hole 15 detachable lever mounting portion 153 wearing notch 16 guide slot 165 guide right slot 166 Guide left long hole 17 Saw blade mounting portion 174 Saw blade mounting hole 18 Handle mounting portion 184 Handle mounting hole 185 Mounting tool 21 Guide tool 22 Cylindrical part 23 Rotating notch 24 Mounting hole 31 Rotating tool 33 Female thread part 41 Feeding rod 42 Push Seat 43 Male thread 44 Moving shaft mounting hole 51 Removable lever 52 Pushing portion 523 Coil spring 53 Locking pin hole 531 Locking pin 54 Moving shaft hole 541 Moving shaft 56 Spring groove hole 563 Leaf spring 61 Angle display 611 Upper angle display 612 Lower Angle display 71 Saw blade 72 Sliding portion 73 Locking groove 74 Blade mounting hole 741 Saw blade mounting tool 81 Handle portion 83 Folding groove 90 Longitudinal arrow 907 Tip side 9 8 the rear end 91 the width direction arrow 911 right 912 left 97 saw blade rotating direction of arrow 971 saw blade closed side 972 saw blade open side

Claims (3)

The saw blade operating body (11) is formed with a saw blade mounting portion (17), a detachable lever mounting portion (15), a guide tool mounting portion (12) and a handle mounting portion (18).
A saw blade (71) is pivotally attached to the saw blade attachment portion (17), and the saw blade (83) is formed in a folding groove (83) formed in a handle portion (81) in the handle attachment portion (18). 71) The handle (81) to be folded and stored is fixed,
A guide tool (21) is fixed to the guide tool mounting portion (12), and a feed rod (31) is loosely inserted into a rotary notch (23) formed in the guide tool (21). 41) is screwed, and a moving shaft mounting hole (44) is formed in the feed rod (41).
A guide elongated hole (16) and a mounting notch (153) are formed in the attaching / detaching lever attaching portion (15), and a moving shaft (541) is fed to the moving shaft hole (54) of the attaching / detaching lever (51). The rod (41) is attached to the guide slot (16) while being loosely inserted into the moving shaft attachment hole (44), and the latch pin (531) is inserted into the latch pin hole (53) of the detachable lever (51). ) Is locked, and the locking pin (531) is loosely inserted into the wearing notch (153),
The rotation of the rotating tool (31) is converted into linear movement of the moving shaft (541) connected to the feed bar (41) and linear movement of the locking pin (531). ) And the saw blade (71) is rotated so that the angle formed by the saw blade (71) and the handle portion (81) can be adjusted.   The locking pin (531) for locking the saw blade (71) and the handle portion (81) and the locking groove (73) formed in the saw blade (71) are provided. The folding saw according to claim 1.   An angle display (61) indicating an angle formed by the saw blade (71) and the handle portion (81) is provided on the saw blade operating body (11) and the detachable lever (51). Or the folding saw of Claim 2.

Images