saw

Abstract

To provide a saw capable of suppressing an increase in manufacturing costs. [Solution] A saw 10 is provided which has a first saw blade 11 and a second saw blade 12 for cutting an object, and a handle portion connected to the first saw blade 11 and the second saw blade 12, the handle portion having a first handle portion 13 and a second handle portion 14, the first handle portion 13 having a first component piece 23 and a second component piece arranged overlapping the first component piece 23, the second handle portion 14 having a third component piece and a fourth component piece 54 arranged overlapping the third component piece, and the first component piece 23, the second component piece, the third component piece, and the fourth component piece 54 each have the same shape, structure, and dimensions.

Description

[Technical field]

[0001] The present disclosure relates to a saw having a first saw blade and a second saw blade. [Background technology]

[0002] An example of a saw having a first saw blade and a second saw blade is described in Patent Document 1. The saw described in Patent Document 1 has a band-shaped first saw blade that cuts an object, a band-shaped second saw blade that clamps and cuts an object together with the first saw blade, and a first support member (first handle portion) and a second support member (second handle portion) that are connected to both ends in the longitudinal direction of the first saw blade and both ends in the longitudinal direction of the second saw blade and are grasped by a user with both hands, respectively. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3246809 Summary of the Invention [Problem to be solved by the invention]

[0004] The present inventors recognized that with the saw described in Patent Document 1, the first handle portion and the second handle portion are each made up of parts having different shapes and structures, which increases the manufacturing costs of the saw.

[0005] An object of the present disclosure is to provide a saw that can suppress an increase in manufacturing costs. [Means for solving the problem]

[0006] The saw disclosed herein includes a band-shaped first saw blade for cutting an object, a band-shaped second saw blade for clamping and cutting an object together with the first saw blade, and a handle portion connected to both longitudinal ends of the first saw blade and both longitudinal ends of the second saw blade, supporting the first saw blade and the second saw blade movably in the longitudinal direction, allowing the first saw blade and the second saw blade to be changed in a state in which the first saw blade and the second saw blade are maintained parallel to each other, and operable by a user with a hand. The handle portion includes a first handle portion connected to a first longitudinal end of the first saw blade and a first longitudinal end of the second saw blade, and a second longitudinal end of the first saw blade and a second longitudinal end of the second saw blade. and a second handle portion connected to a second longitudinal end of the second saw blade, the first handle portion having a first component piece and a second component piece arranged on top of the first component piece and sandwiching the first longitudinal end of the first saw blade and the first longitudinal end of the second saw blade together with the first component piece, the second handle portion having a third component piece and a fourth component piece arranged on top of the third component piece and sandwiching the second longitudinal end of the first saw blade and the second longitudinal end of the second saw blade together with the third component piece, the first component piece, the second component piece, the third component piece, and the fourth component piece each having the same shape, structure, and dimensions. Effect of the Invention

[0007] According to the present disclosure, a saw can be provided that can suppress an increase in manufacturing costs. [Brief description of the drawings]

[0008] [Figure 1] FIG. [Diagram 2] FIG. 2 is a rear view of the saw shown in FIG. [Diagram 3] 2A is a plan view of the saw shown in FIG. 1, and FIG. 2B is a bottom view of the saw shown in FIG. [Figure 4] 2A is a left side view of the saw shown in FIG. 1, and FIG. 2B is a right side view of the saw shown in FIG. [Diagram 5] FIG. 2 is a front view showing a state in which the saw shown in FIG. 1 is used. [Figure 6]1. FIG. 4 is a front view showing another state of use of the saw shown in FIG. [Figure 7] 4(A) and 4(B) are exploded views showing the configuration of a first handle portion of the saw. [Figure 8] 4(A) and 4(B) are exploded views showing the configuration of a first handle portion of the saw. [Figure 9] FIG. 2 is an exploded view of the parts of the saw. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (Overview of the embodiment) The saw of this embodiment has a first saw blade and a second saw blade arranged in parallel. The saw of this embodiment can cut an object by clamping an object between the first saw blade and the second saw blade and a user gripping the first handle portion and the second handle portion with both hands and reciprocating the first saw blade and the second saw blade.

[0010] (Example of a saw) The saw of this embodiment is shown in Figs. 1, 2, 3(A), (B), 4(A), (B), 5, and 6. The saw 10 has a plurality of components, specifically, a first saw blade (first saw body) 11, a second saw blade (second saw body) 12, a first handle portion 13, and a second handle portion 14. The first saw blade 11 and the second saw blade 12 are elements that come into contact with an object W1 and cut the object. Both the first saw blade 11 and the second saw blade 12 are made of steel and have a thin plate shape (belt-like, long shape). The saw 10 can be assembled and disassembled. When the saw 10 is assembled, the first saw blade 11 and the second saw blade 12 are connected to the first handle portion 13 and the second handle portion 14.

[0011] When saw 10 is assembled, in a front view of saw 10 shown in Fig. 1, saw 10 has a shape, structure, and dimensions that are approximately point-symmetrical about symmetry point P5. In a front view of saw 10 shown in Fig. 1, first handle portion 13 and second handle portion 14 have a shape, structure, and dimensions that are approximately point-symmetrical about symmetry point P5. In a rear view of saw 10 shown in Fig. 2, saw 10 has a shape, structure, and dimensions that are approximately point-symmetrical about symmetry point P6. In a rear view of saw 10 shown in Fig. 2, first handle portion 13 and second handle portion 14 have a shape, structure, and dimensions that are approximately point-symmetrical about symmetry point P6.

[0012] When the saw 10 is disassembled, the first saw blade 11 and the second saw blade 12 are detached from the first handle portion 13 and the second handle portion 14. The saw 10 also has a connecting member 30 shown in Fig. 9. The connecting member 30 is in the shape of a long, narrow plate, and is made of a metal, for example, aluminum. When the saw 10 is assembled, the connecting member 30 holds the first saw blade 11 and the second saw blade 12 in parallel, and serves to fix the distance between the first saw blade 11 and the second saw blade 12.

[0013] (Configuration of the first saw blade) First, the configuration of the first saw blade 11 will be described. As shown in Figs. 1, 2, 5, and 6, the first saw blade 11 has sawtooth (saw teeth) 15 provided on a first edge in the longitudinal direction and a spine 16 provided on a second edge in the longitudinal direction. The sawtooth 15 has a plurality of teeth, and the spine 16 has no teeth. As shown in Fig. 9, the first saw blade 11 has an attachment hole 17 provided on a first end in the longitudinal direction and an attachment hole 18 provided on a second end in the longitudinal direction. The attachment holes 17 and 18 are provided so as to penetrate the first saw blade 11 in the thickness direction. When the first saw blade 11 is viewed from the front, both the first end in the longitudinal direction and the second end in the longitudinal direction of the first saw blade 11 are curved in an arc shape.

[0014] (Configuration of the second saw blade) Next, the configuration of the second saw blade 12 will be described. As shown in Figs. 1, 2, 5, and 6, the second saw blade 12 has sawtooth (saw teeth) 19 provided on a first edge in the longitudinal direction and a spine 20 provided on a second edge in the longitudinal direction. The sawtooth 19 has a plurality of teeth, and the spine 20 has no teeth. As shown in Fig. 9, the second saw blade 12 has an attachment hole 21 provided on a first end in the longitudinal direction and an attachment hole 22 provided on a second end in the longitudinal direction. The attachment holes 21 and 22 are provided so as to penetrate the second saw blade 12 in the thickness direction. When the second saw blade 12 is viewed from the front, the first end in the longitudinal direction and the second end in the longitudinal direction of the second saw blade 12 are both curved in an arc shape. The thickness of the first saw blade 11 and the thickness of the second saw blade 12 are the same.

[0015] (Outline of the first and second handle parts) Further, the configuration of the first handle portion 13 and the second handle portion 14 will be described. As shown in Figs. 1 and 2, the first handle portion 13 and the second handle portion 14 are connected to the first saw blade 11 and the second saw blade 12. As shown in Figs. 1, 2, 5, and 6, the first handle portion 13 and the second handle portion 14 serve to hold the first saw blade 11 and the second saw blade 12 in parallel. The first handle portion 13 and the second handle portion 14 are arranged with a gap between them, and the longitudinal ends of the first saw blade 11 and the second saw blade 12 are connected to the first handle portion 13 and the second handle portion 14. The first handle portion 13 and the second handle portion 14 can also be removed from the first saw blade 11 and the second saw blade 12.

[0016] (Configuration of the first handle part) The first handle portion 13 has a plurality of components, specifically, a first component piece 23 and a second component piece 24 shown in Figs. 7(A) and (B). The material of each of the first component piece 23 and the second component piece 24 may be any of synthetic resin, metal, wood, etc. The first component piece 23 and the second component piece 24 are overlapped and fixed to each other to form the first handle portion 13. For convenience, an example will be described here in which the first component piece 23 and the second component piece 24 are fixed by a fixing element, specifically, a screw member.

[0017] The first component piece 23 and the second component piece 24 have the same shape, structure, and dimensions, and are plate-shaped. More specifically, the first component piece 23 and the second component piece 24 have shapes, structures, and dimensions that are approximately point-symmetrical with respect to the symmetrical point P1 shown in FIG. 7(A) as the center, and have shapes, structures, and dimensions that are approximately point-symmetrical with respect to the symmetrical point P2 shown in FIG. 7(B) as the center. For this reason, the first component piece 23 will be mainly described. Around the first component piece 23, a first edge portion 25, a second edge portion 26, a third edge portion 27, and a fourth edge portion 28 are each provided in a straight line shape. The first edge portion 25 and the second edge portion 26 are parallel, and the third edge portion 27 and the fourth edge portion 28 are parallel. The first edge portion 25 and the second edge portion 26 are arranged at a predetermined angle with respect to the third edge portion 27 and the fourth edge portion 28.

[0018] The first component piece 23 has grooves 31, 32, notches 33, 34, and a hole 35. The grooves 31, 32, and the notches 33, 34 are provided on one of the two surfaces of the first component piece 23 that is superimposed on the second component piece 24. The groove 31 is disposed along the third edge portion 27, and the groove 32 is disposed along the fourth edge portion 28. The groove 31 is disposed between the third edge portion 27 and the groove 32, and the groove 32 is disposed between the fourth edge portion 28 and the groove 31. The notch 33 is provided inside the connection portion between the first edge portion 25 and the third edge portion 27, and between the third edge portion 27 and the groove 31. The notch 33 is provided with an attachment hole 36 that penetrates the first component piece 23 in the thickness direction.

[0019] The notch 34 is provided inside the connection portion between the first edge portion 25 and the fourth edge portion 28, and between the fourth edge portion 28 and the groove 32. The notch 34 is provided with an attachment hole 37 that penetrates the first component piece 23 in the thickness direction. The attachment holes 36, 37 are provided for inserting a screw member 50 that fixes the first component piece 23 and the second component piece 24 together. The screw member 50 is a bolt. The screw member 50 is used together with a nut 52.

[0020] In the first component piece 23, a female screw hole 38 is provided between the third edge portion 27 and the groove 31. The female screw hole 38 penetrates the first component piece 23 in the thickness direction. In the first component piece 23, a female screw hole 39 is provided between the fourth edge portion 28 and the groove 32. The female screw hole 39 is provided on one of the two surfaces of the first component piece 23 that is superimposed on the second component piece 24. The female screw hole 39 does not penetrate the first component piece 23 in the thickness direction. In the first component piece 23, female screw holes 40, 41 are provided between the grooves 31 and 32 and at a position close to the second edge portion 26. The female screw hole 40 penetrates the first component piece 23 in the thickness direction. The female screw hole 41 is provided on one of the two surfaces of the first component piece 23 that is superimposed on the second component piece 24. The female screw hole 41 does not penetrate the first component piece 23 in the thickness direction. The female screw holes 38, 39, 40, and 41 are provided for screwing in a screw member 51 that fixes the first component piece 23 and the second component piece 24. The screw member 51 is a screw.

[0021] Hole 35 penetrates first component piece 23 in the thickness direction. Hole 35 is located between grooves 31 and 32, and between first edge 25 and female threaded holes 40, 41. Hole 35 is provided for inserting part of the hand of an operator using saw 10, such as a finger.

[0022] (Configuration of the second handle part) The second handle portion 14 has a plurality of components, specifically, a third component piece 53 and a fourth component piece 54 shown in Figures 8(A) and (B). The material of the third component piece 53 and the fourth component piece 54 is selected to be the same as the material of the first component piece 23 and the second component piece 24. The third component piece 53 and the fourth component piece 54 are overlapped and fixed to each other to form the second handle portion 14. For convenience, an example will be described here in which the third component piece 53 and the fourth component piece 54 are fixed by a fixing element, specifically, a screw member.

[0023] The shape, structure, and dimensions of the third component piece 53 are the same as those of the first component piece 23. The shape, structure, and dimensions of the fourth component piece 54 are the same as those of the third component piece 53. The third component piece 53 and the fourth component piece 54 have shapes, structures, and dimensions that are approximately point-symmetrical about the symmetrical point P3 shown in Fig. 8(A) as the center, and have shapes, structures, and dimensions that are approximately point-symmetrical about the symmetrical point P4 shown in Fig. 8(B) as the center. The third component piece 53 and the fourth component piece 54 are both plate-shaped.

[0024] (Example of saw assembly) A user can assemble saw 10 through the following steps. Here, an example of assembling saw 10 without using connecting member 30 will be described. First, the steps of connecting first handle portion 13 to first saw blade 11 and second saw blade 12 will be described. Before overlapping first component piece 23 and second component piece 24 of first handle portion 13, a user positions a first end portion of first saw blade 11 between notches 33 and 34. In addition, a first end portion of second saw blade 12 is positioned between notches 33 and 34.

[0025] Then, the first component piece 23 and the second component piece 24 are overlapped. Then, the position of the mounting hole 36 of the first component piece 23 and the position of the mounting hole 37 of the second component piece 24 coincide. Furthermore, the position of the mounting hole 37 of the first component piece 23 and the position of the mounting hole 36 of the second component piece 24 coincide. Furthermore, the position of the female screw hole 38 of the first component piece 23 and the position of the female screw hole 39 of the second component piece 24 coincide. Furthermore, the position of the female screw hole 39 of the first component piece 23 and the position of the female screw hole 38 of the second component piece 24 coincide. Furthermore, the position of the female screw hole 40 of the first component piece 23 and the position of the female screw hole 41 of the second component piece 24 coincide. Furthermore, the position of the female screw hole 41 of the first component piece 23 and the position of the female screw hole 40 of the second component piece 24 coincide. Furthermore, the position of the groove 31 in the first component piece 23 coincides with the position of the groove 32 in the second component piece 24. Furthermore, the position of the groove 32 in the first component piece 23 coincides with the position of the groove 31 in the second component piece 24.

[0026] Thereafter, the user passes the screw member 50 through the mounting hole 36 of the first component piece 23, the mounting hole 17 of the first saw blade 11, and the mounting hole 37 of the second component piece 24, attaches the nut 52 to the screw member 50, and tightens the screw member 50. Furthermore, the user passes the screw member 50 through the mounting hole 37 of the first component piece 23, the mounting hole 21 of the second saw blade 12, and the mounting hole 36 of the second component piece 24, attaches the nut 52 to the screw member 50, and tightens the screw member 50.

[0027] By the above operation, the first saw blade 11 and the second saw blade 12 are sandwiched between the first component piece 23 and the second component piece 24, and the first component piece 23 and the second component piece 24 are connected to the first saw blade 11 and the second saw blade 12. The screw member 50 attached to the first handle portion 13 is used to connect the first saw blade 11 and the second saw blade 12 to the first handle portion 13. For this reason, the tightening force of the screw member 50 attached to the first handle portion 13 may be such that a strong clamping force is not applied to the first handle portion 13.

[0028] Next, the user screws and tightens the four screw members 51 into the female threaded holes 38, 39. Furthermore, the user screws and tightens the two screw members 51 into the female threaded holes 40, 41. When the user completes the work of tightening the screw members 50, nuts 52, and screw members 51, the first component piece 23 and the second component piece 24 are fixed together, and the assembly of the first handle portion 13 is completed.

[0029] Furthermore, the process of connecting the second handle portion 14 to the first saw blade 11 and the second saw blade 12 will be described. Before overlapping the third component piece 53 and the fourth component piece 54 of the second handle portion 14, the user places the first end of the first saw blade 11 between the notches 33 and 34. Also, the user places the first end of the second saw blade 12 between the notches 33 and 34. Then, the third component piece 53 and the fourth component piece 54 are overlapped. Then, the position of the mounting hole 36 of the third component piece 53 and the position of the mounting hole 37 of the fourth component piece 54 coincide with each other. Also, the position of the mounting hole 37 of the third component piece 53 and the position of the mounting hole 36 of the fourth component piece 54 coincide with each other.

[0030] Furthermore, the position of the female screw hole 38 of the third component piece 53 and the position of the female screw hole 39 of the fourth component piece 54 coincide with each other. Furthermore, the position of the female screw hole 39 of the third component piece 53 and the position of the female screw hole 38 of the fourth component piece 54 coincide with each other. Furthermore, the position of the female screw hole 40 of the third component piece 53 and the position of the female screw hole 41 of the fourth component piece 54 coincide with each other. Furthermore, the position of the female screw hole 41 of the third component piece 53 and the position of the female screw hole 40 of the second component piece 24 coincide with each other. Furthermore, the position of the groove 31 of the third component piece 53 and the position of the groove 32 of the fourth component piece 54 coincide with each other. Furthermore, the position of the groove 32 of the third component piece 53 and the position of the groove 31 of the fourth component piece 54 coincide with each other.

[0031] Thereafter, the user passes the screw member 50 through the mounting hole 37 of the fourth component piece 54, the mounting hole 18 of the first saw blade 11, and the mounting hole 36 of the third component piece 53, attaches the nut 52 to the screw member 50, and tightens the screw member 50. Furthermore, the user passes the screw member 50 through the mounting hole 36 of the fourth component piece 54, the mounting hole 22 of the second saw blade 12, and the mounting hole 37 of the third component piece 53, attaches the nut 52 to the screw member 50, and tightens the screw member 50.

[0032] By the above operation, the first saw blade 11 and the second saw blade 12 are sandwiched between the third component piece 53 and the fourth component piece 54, and the third component piece 53 and the fourth component piece 54 are connected to the first saw blade 11 and the second saw blade 12. The screw member 50 attached to the second handle portion 14 is used to connect the first saw blade 11 and the second saw blade 12 to the second handle portion 14. For this reason, the tightening force of the screw member 50 attached to the second handle portion 14 may be such that a strong clamping force is not applied to the second handle portion 14.

[0033] Next, the user screws and tightens the four screw members 51 into the female threaded holes 38, 39. Furthermore, the user screws and tightens the two screw members 51 into the female threaded holes 40, 41. When the user completes the work of tightening the screw members 50, nuts 52, and screw members 51, the third component piece 53 and the fourth component piece 54 are fixed together, and the assembly of the second handle portion 14 is completed.

[0034] (Example of using a saw) FIG. 5 is a front view showing an example of cutting an object W1 using the saw 10. The first saw blade 11 and the second saw blade 12 are connected to the first handle portion 13 and the second handle portion 14 with the saw teeth 15 and the saw teeth 19 facing each other. A user inserts the object W1 between the first saw blade 11 and the second saw blade 12. The object W1 is an object to be cut by the saw 10, and the shape of the object W1 is a cylinder, a cylinder, a bar, or the like. The material of the object W1 is wood, metal, synthetic resin, or the like. It is assumed that the maximum outer diameter φ1 of the object W1 is less than the maximum value of the interval (distance) L1 between the first saw blade 11 and the second saw blade 12. Furthermore, the object W1 is fixed by a fixing jig, for example, a clamp.

[0035] 5, the user can apply a force to the first handle portion 13 and the second handle portion 14 to move them in parallel in opposite directions along a first direction A1. The first direction A1 is a direction along an imaginary line B1 passing through the screw member 50 attached to the first handle portion 13 and an imaginary line B2 passing through the screw member 50 attached to the second handle portion 14. Then, an angle θ1 between the sawtooth 15 of the first saw blade 11 and the imaginary line B1 changes. Also, an angle θ2 between the sawtooth 19 of the second saw blade 12 and the imaginary line B1 changes. Also, an angle θ3 between the sawtooth 15 of the first saw blade 11 and the imaginary line B2 changes.

[0036] Furthermore, the angle θ4 between the sawtooth 19 of the second saw blade 12 and the imaginary line B2 changes. That is, the distance L1 between the first saw blade 11 and the second saw blade 12 changes, specifically, becomes narrower. In other words, the first saw blade 11, the second saw blade 12, the first handle portion 13, and the second handle portion 14 can be operated in a state of being linked like a link mechanism. In this way, the sawtooth 15 of the first saw blade 11 and the sawtooth 19 of the second saw blade 12 are each brought into contact with the outer surface of the target W1.

[0037] Then, the user reciprocates the saw 10 along the second direction C1 while holding the first handle portion 13. The second direction C1 is a direction along the saw teeth 15, 19, and the saw teeth 15, 19 bite into the outer peripheral surface of the object W1, respectively, and the cutting of the object W1 progresses. As the cutting of the object W1 progresses, the user of the saw 10 operates the saw 10 so that the angles θ1, θ4 are enlarged and the angles θ2, θ3 are reduced. In other words, the interval L1 becomes narrower. In this way, the saw 10 can simultaneously cut the object W1 from both sides in the thickness direction while the object W1 is sandwiched between the first saw blade 11 and the second saw blade 12. Therefore, the time required from starting to completing the cutting of the object W1 can be shortened, and the work efficiency is improved.

[0038] Also, the user can manually operate saw 10 to reciprocate first saw blade 11 and second saw blade 12. This eliminates the need for a drive device, such as a drive system and gear structure, and provides a saw 10 with a simple structure. When the user operates saw 10 so that angles θ1 and θ4 are reduced and angles θ2 and θ3 are increased, interval L1 increases.

[0039] (Effects of the embodiment) As shown in Fig. 1, saw 10 has first handle portion 13 and second handle portion 14 configured to be substantially point-symmetrical about symmetry point P5. Also, as shown in Fig. 2, saw 10 has first handle portion 13 and second handle portion 14 configured to be substantially point-symmetrical about symmetry point P6.

[0040] Furthermore, in the first handle portion 13, the first component piece 23 and the second component piece 24 are configured to be substantially point-symmetrical with respect to the symmetrical point P1 as shown in Fig. 7(A). Furthermore, in the first handle portion 13, the first component piece 23 and the second component piece 24 are configured to be substantially point-symmetrical with respect to the symmetrical point P2 as shown in Fig. 7(B).

[0041] Furthermore, in the second handle portion 14, the third component piece 53 and the fourth component piece 54 are configured to be substantially point-symmetrical with respect to the symmetrical point P3 as shown in Fig. 8(A). Furthermore, in the second handle portion 14, the third component piece 53 and the fourth component piece 54 are configured to be substantially point-symmetrical with respect to the symmetrical point P4 as shown in Fig. 8(B).

[0042] The first component piece 23 and the third component piece 53 have the same shape, structure, and dimensions. Furthermore, the second component piece 24 and the fourth component piece 54 have the same shape, structure, and dimensions. Furthermore, when the first component piece 23 shown in FIG. 7(A) is rotated 180 degrees, it can be used as the second component piece 24. Furthermore, when the third component piece 53 shown in FIG. 8(A) is rotated 180 degrees, it can be used as the fourth component piece 54. Furthermore, the first component piece 23 shown in FIG. 7(A) can be used as the third component piece 53 shown in FIG. 8(A). Furthermore, the second component piece 24 shown in FIG. 7(A) can be used as the fourth component piece 54 shown in FIG. 8(A).

[0043] With the above-described configuration, saw 10 can have four components that are common to each other (shared). This reduces the number of steps required to manufacture the components of saw 10, and also prevents an increase in the manufacturing costs of the components of saw 10.

[0044] Furthermore, when the components of saw 10 are made of synthetic resin or metal and are molded using a mold, the components can be mass-produced. This reduces the number of steps required to manufacture the components of saw 10, and also prevents an increase in the manufacturing costs of the components of saw 10.

[0045] Furthermore, the user can assemble and disassemble saw 10 even if the attachment positions and orientations of first component piece 23, third component piece 53, second component piece 24, and fourth component piece 54 are changed relative to one another. Therefore, the user can easily perform the tasks of assembling and disassembling saw 10.

[0046] 1, the first handle portion 13 and the second handle portion 14 of the saw 10 are configured to be substantially point-symmetrical with respect to the symmetrical point P5. As shown in FIG. 2, the first handle portion 13 and the second handle portion 14 of the saw 10 are configured to be substantially point-symmetrical with respect to the symmetrical point P6. Therefore, when the user grasps the first handle portion 13 and the second handle portion 14 with the left hand and the right hand, the operation feeling of the first handle portion 13 and the second handle portion 14 is the same, and the workability of cutting the object W1 is improved. Note that when replacing one or both of the saw blades 11 and 12, it is sufficient to loosen the screw member 50 that fixes the saw blade to be replaced, and this can be done without disassembling the first handle portion 13 and the second handle portion 14.

[0047] (Other uses for saws) 6 is a front view showing another example of use of saw 10, specifically, an example of using connecting member 30. First saw blade 11 and second saw blade 12 are connected to first handle portion 13 and second handle portion 14 with spine 20 of second saw blade 12 facing sawtooth 15 of first saw blade 11. Also, connecting member 30 is connected to first handle portion 13 and second handle portion 14. A first end of connecting member 30 is disposed between groove 31 of first component piece 23 and groove 32 of second component piece 24. Also, a second end of connecting member 30 is disposed between groove 31 of third component piece 53 and groove 32 of fourth component piece 54. The operation of connecting the connection member 30 to the first handle portion 13 and the second handle portion 14, or the operation of removing the connection member 30 from the first handle portion 13 and the second handle portion 14, is performed by loosening the screw member 50 attached to either the first handle portion 13 or the second handle portion 14, and moving the first handle portion 13 and the second handle portion 14 closer or farther apart. In other words, this can be performed without disassembling the first handle portion 13 and the second handle portion 14.

[0048] Furthermore, the tightening force of the four screw members 50 is set to be stronger than that in the example of use of the saw 10 described with reference to Fig. 5. That is, the clamping force applied to the first saw blade 11 and the second saw blade 12 from the first component piece 23, the second component piece 24, the third component piece 53, and the fourth component piece 54 is relatively large. Then, when a force in a direction that tries to change the angles θ1, θ2, θ3, and θ4 is applied to the first handle portion 13 and the second handle portion 14, the connecting member 30 engages with the first handle portion 13 and the second handle portion 14.

[0049] For this reason, the first handle portion 13 is not moved about the screw member 50 relative to the first saw blade 11, the second saw blade 12, and the connecting member 30. In addition, the second handle portion 14 is not moved about the screw member 50 relative to the first saw blade 11, the second saw blade 12, and the connecting member 30. In other words, the connecting member 30 serves to fix the distance L1 between the first saw blade 11 and the second saw blade 12 when the saw 10 is assembled. Therefore, the angles θ1, θ2, θ3, and θ4 are fixed at approximately 90 degrees.

[0050] Then, the user grasps first handle portion 13 and second handle portion 14 with their hands, and reciprocates saw 10 along second direction C1 with saw teeth 19 of second saw blade 12 in contact with object W1. Then, object W1 can be cut by second saw blade 12.

[0051] The first saw blade 11 may be connected to the first handle portion 13 and the second handle portion 14 in a state in which the back 16 of the first saw blade 11 and the sawtooth 19 of the second saw blade 12 face each other. In this case, the first end of the connecting member 30 is disposed between the groove 32 of the first component piece 23 and the groove 31 of the second component piece 24. The second end of the connecting member 30 is disposed between the groove 32 of the third component piece 53 and the groove 31 of the fourth component piece 54. Then, the user holds the first handle portion 13 and the second handle portion 14 with his / her hands, and reciprocates the saw 10 along the second direction C1 with the sawtooth 15 of the first saw blade 11 in contact with the object W1. Then, the first saw blade 11 can cut the object W1.

[0052] (Example of change) The fixing structure for fixing the components of the first handle portion may be different from a screw member, a nut, or a female threaded hole. For example, the fixing structure may have a recess and a protrusion provided on the first component piece and the second component piece, respectively, and the recess and the protrusion may be configured to be mutually engageable and disengageable. The fixing structure for fixing the components of the second handle portion may be different from a screw member, a nut, or a female threaded hole. For example, the fixing structure may have a recess and a protrusion provided on the third component piece and the fourth component piece, respectively, and the recess and the protrusion may be mutually engageable and disengageable.

[0053] The fixing structure for fixing the first and second components of the first handle may include fixing with an adhesive. Furthermore, the fixing structure for fixing the third and fourth components of the second handle may include fixing with an adhesive. And the first saw blade and the second saw blade may be connected to the first and second handle by a screw member.

[0054] Furthermore, if the first component piece, the second component piece, the third component piece, and the fourth component piece are made of metal, the fixing structure for fixing the first component piece and the second component piece may include fixing by soldering or welding. Furthermore, the fixing structure for fixing the third component piece and the fourth component piece may include fixing by soldering or welding. And, the first saw blade and the second saw blade may be connected to the first handle portion and the second handle portion by a screw member.

[0055] Furthermore, if the assembled saw 10 is not disassembled and the connecting member 30 is not used, the fixing members for fixing the first component piece 23 and the second component piece 24 and the fixing members for fixing the third component piece 53 and the fourth component piece 54 can be rivets instead of the screw members 50 and nuts 52. In this case, the distance L1 can be adjusted by operating the first handle portion 13 and the second handle portion 14 around the rivet.

[0056] (supplementary explanation) An example of the technical meaning of the matters described in this embodiment is as follows. Saw 10 is an example of a saw. First saw blade 11 is an example of a first saw blade. Second saw blade 12 is an example of a second saw blade. First handle portion 13 is an example of a first handle portion. Second handle portion 14 is an example of a second handle portion. First component piece 23 is an example of a first component piece. Second component piece 24 is an example of a second component piece. Third component piece 53 is an example of a third component piece. Fourth component piece 54 is an example of a fourth component piece. Connecting member 30 is an example of a connecting member. Spacing L1 is an example of a spacing.

[0057] This embodiment is not limited to those disclosed using the drawings, and various modifications are possible within the scope of the present invention. For example, the peripheral shapes of the first component piece, the second component piece, the third component piece, and the fourth component piece in a front view of the saw include, for example, a rectangle, an ellipse, a half moon, etc. The cross-sectional shape of the target object includes a circle, a rectangle, a triangle, a hexagon, an ellipse, etc. [Industrial Applicability]

[0058] This embodiment can be used as a saw having a first saw blade and a second saw blade. [Explanation of symbols]

[0059] 10... saw, 11... first saw blade, 12... second saw blade, 13... first handle portion, 14... second handle portion, 23... first component piece, 24... second component piece, 53... third component piece, 54... fourth component piece, 30...connecting member, L1...spacing

Claims

1. A band-shaped first saw blade for cutting an object; a band-shaped second saw blade that clamps and cuts an object together with the first saw blade; a handle portion connected to both ends of the first saw blade in a longitudinal direction and both ends of the second saw blade in a longitudinal direction, supporting the first saw blade and the second saw blade movably in the longitudinal direction, allowing the distance between the first saw blade and the second saw blade to be changed while maintaining the first saw blade and the second saw blade parallel to each other, and being operated by a user with a hand; having The handle portion is a first handle portion connected to a first end portion of the first saw blade in a longitudinal direction and a first end portion of the second saw blade in a longitudinal direction; a second handle portion connected to a second end portion of the first saw blade in a longitudinal direction and a second end portion of the second saw blade in a longitudinal direction; Equipped with The first handle portion includes: A first component piece; a second component piece disposed on top of the first component piece and sandwiching a first end of the first saw blade in a longitudinal direction and a first end of the second saw blade in a longitudinal direction together with the first component piece; having The second handle portion includes: A third component piece; and a fourth component piece disposed on top of the third component piece and sandwiching a second end portion of the first saw blade in the longitudinal direction and a second end portion of the second saw blade in the longitudinal direction together with the third component piece; having The saw, wherein the first piece, the second piece, the third piece, and the fourth piece are each identical in shape, structure, and size.

2. 2. A saw according to claim 1, The saw further includes a connecting member connected to the first handle portion and the second handle portion and fixing the distance between the first saw blade and the second saw blade while holding the first saw blade and the second saw blade in parallel.

Images