saw

Abstract

To provide a saw that can suppress increases in manufacturing costs. [Solution] The saw 10 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 comprises a first handle portion 13 and a second handle portion 14. The first handle portion 13 has a first component 23 and a second component placed on top of the first component 23. The second handle portion 14 has a third component and a fourth component 54 placed on top of the third component. The first component 23, the second component, the third component, and the fourth component 54 are each provided with a saw 10 having 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 Art

[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 includes a strip-shaped first saw blade for cutting an object, a strip-shaped second saw blade for cutting the object while sandwiching the object together with the first saw blade, and first support members (first gripping portions) and second support members (second gripping portions) 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 that are each grasped by the user's both hands.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventor of the present application recognized that according to the saw described in Patent Document 1, since the first gripping portion and the second gripping portion are each composed of parts having different shapes and structures, the manufacturing cost of the saw increases.

[0005] An object of the present disclosure is to provide a saw capable of suppressing an increase in manufacturing cost.

Means for Solving the Problems

[0006] The saw of this disclosure comprises a strip-shaped first saw blade for cutting an object, a strip-shaped second saw blade for cutting an object by sandwiching it 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, which supports the first saw blade and the second saw blade so as to be movable in the longitudinal direction, and which allows 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, and which is operated by the user by hand, the handle portion comprising a first handle portion connected to the first longitudinal end of the first saw blade and the first longitudinal end of the second saw blade, and the second longitudinal end of the first saw blade and the The first handle portion comprises a first component and a second component that is placed on top of the first component and sandwiches the first longitudinal end of the first saw blade and the second longitudinal end of the second saw blade together with the first component, and the second handle portion comprises a third component and a fourth component that is placed on top of the third component and sandwiches the second longitudinal end of the first saw blade and the second longitudinal end of the second saw blade together with the third component, and the first component, second component, third component and fourth component are all the same in shape, structure and dimensions. [Effects of the Invention]

[0007] According to this disclosure, it is possible to provide a saw that can suppress increases in manufacturing costs. [Brief explanation of the drawing]

[0008] [Figure 1] This is a front view of the saw. [Figure 2] Figure 1 is a rear view of the saw. [Figure 3] (A) is a plan view of the saw shown in Figure 1, and (B) is a bottom view of the saw shown in Figure 1. [Figure 4] (A) is a left side view of the saw shown in Figure 1, and (B) is a right side view of the saw shown in Figure 1. [Figure 5] Figure 1 is a front view showing the saw in use. [Figure 6]Figure 1 is a front view showing another use of the saw. [Figure 7] (A) and (B) are exploded views showing the configuration of the first handle portion of the saw. [Figure 8] (A) and (B) are exploded views showing the configuration of the first handle portion of the saw. [Figure 9] This is an exploded view of the parts of a saw. [Modes for carrying out the invention]

[0009] (Summary 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 gripping it with the first and second saw blades and having the user grasp the first and second handles with both hands and reciprocating the first and second saw blades.

[0010] (Specific example of a saw) The saw of this embodiment is shown in Figures 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 and 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 the 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 (strip shape, elongated 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] In the assembled state, as shown in Figure 1, the saw 10 has a shape, structure, and dimensions that are approximately point-symmetric with respect to the point of symmetry P5 in a front view of the saw 10. As shown in Figure 1, the first handle portion 13 and the second handle portion 14 have a shape, structure, and dimensions that are approximately point-symmetric with respect to the point of symmetry P5 in a front view of the saw 10. As shown in Figure 2, the saw 10 has a shape, structure, and dimensions that are approximately point-symmetric with respect to the point of symmetry P6 in a rear view of the saw 10. As shown in Figure 2, the first handle portion 13 and the second handle portion 14 have a shape, structure, and dimensions that are approximately point-symmetric with respect to the point of symmetry P6 in a rear view of the saw 10.

[0012] The disassembled state of the saw 10 is one in which the first saw blade 11 and the second saw blade 12 have been removed from the first handle portion 13 and the second handle portion 14. The saw 10 also has a connecting member 30 as shown in Figure 9. The connecting member 30 is a narrow, long plate shape, and the material of the connecting member 30 is 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 fixes the distance between the first saw blade 11 and the second saw blade 12.

[0013] (Construction of the first saw blade) First, the structure of the first saw blade 11 will be described. As shown in Figures 1, 2, 5, and 6, the first saw blade 11 has saw teeth 15 provided on the first edge in the longitudinal direction and a back 16 provided on the second edge in the longitudinal direction. Multiple teeth are provided on the saw teeth 15, while no teeth are provided on the back 16. As shown in Figure 9, the first saw blade 11 has a mounting hole 17 provided on the first end in the longitudinal direction and a mounting hole 18 provided on the second end in the longitudinal direction. The mounting 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 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 saw teeth (serrations) 19 provided on the first edge in the longitudinal direction and a back 20 provided on the second edge in the longitudinal direction. A plurality of teeth are provided on the saw teeth 19, and no teeth are provided on the back 20. As shown in FIG. 9, the second saw blade 12 has a mounting hole 21 provided at the first end in the longitudinal direction and a mounting hole 22 provided at the second end in the longitudinal direction. The mounting 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, both the first end and the second end in the longitudinal direction of the second saw blade 12 are 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] (Overview of the first handle part and the second handle part) Furthermore, the configurations of the first handle part 13 and the second handle part 14 will be described. As shown in FIGS. 1 and 2, the first handle part 13 and the second handle part 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 part 13 and the second handle part 14 serve to hold the first saw blade 11 and the second saw blade 12 in parallel. The first handle part 13 and the second handle part 14 are arranged at an interval, and each end in the longitudinal direction of the first saw blade 11 and the second saw blade 12 is connected to the first handle part 13 and the second handle part 14. Note that the first handle part 13 and the second handle part 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 part 13 has a plurality of components, specifically, a first component piece 23 and a second component piece 24 shown in FIGS. 7(A) and 7(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, and the first handle part 13 is constituted. Here, for the sake of convenience, an example in which the first component piece 23 and the second component piece 24 are fixed by a fixing element, specifically, a screw member, will be described.

[0017] < The first component piece 23 and the second component piece 24 are identical in 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 substantially point-symmetric about the symmetric point P1 shown in FIG. 7(A), and have shapes, structures, and dimensions that are substantially point-symmetric about the symmetric point P2 shown in FIG. 7(B). Therefore, mainly the first component piece 23 will be described. Around the first component piece 23, a first edge 25, a second edge 26, a third edge 27, and a fourth edge 28 are provided linearly, respectively. The first edge 25 and the second edge 26 are parallel, and the third edge 27 and the fourth edge 28 are parallel. The first edge 25 and the second edge 26 are arranged at a predetermined angle with respect to the third edge 27 and the fourth edge 28.

[0018] The first component piece 23 has grooves 31, 32, notches 33, 34, and holes 35. The grooves 31, 32 and the notches 33, 34 are provided on the surface of the first component piece 23 that is overlapped with the second component piece 24 among the two surfaces of the first component piece 23. The groove 31 is arranged along the third edge 27, and the groove 32 is arranged along the fourth edge 28. The groove 31 is arranged between the third edge 27 and the groove 32, and the groove 32 is arranged between the fourth edge 28 and the groove 31. The notch 33 is inside the connection portion between the first edge 25 and the third edge 27, and is provided between the third edge 27 and the groove 31. An attachment hole 36 penetrating the first component piece 23 in the thickness direction is provided in the notch 33.

[0019] The notch 34 is inside the connection portion between the first edge 25 and the fourth edge 28, and is provided between the fourth edge 28 and the groove 32. An attachment hole 37 penetrating the first component piece 23 in the thickness direction is provided in the notch 34. The attachment holes 36, 37 are provided for inserting a screw member 50 for fixing the first component piece 23 and the second component piece 24. 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 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 28 and the groove 32. The female screw hole 39 is provided on the surface of the first component piece 23 that overlaps with 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 and 41 are provided between the grooves 31 and 32 and close to the second edge 26. The female screw hole 40 penetrates the first component piece 23 in the thickness direction. The female screw hole 41 is provided on the surface of the first component piece 23 that overlaps with 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] The hole 35 penetrates the first component piece 23 in the thickness direction. The hole 35 is located between grooves 31 and 32, and between the first edge portion 25 and the female screw holes 40, 41. The hole 35 is provided for inserting a part of the hand of a worker using the saw 10, such as a finger.

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

[0023] Furthermore, the shape, structure, and dimensions of the third component 53 are the same as those of the first component 23. In addition, the shape, structure, and dimensions of the fourth component 54 are the same as those of the third component 53. The third component 53 and the fourth component 54 have shapes, structures, and dimensions that are approximately point-symmetric with respect to the symmetry point P3 shown in Figure 8(A), and shapes, structures, and dimensions that are approximately point-symmetric with respect to the symmetry point P4 shown in Figure 8(B). Both the third component 53 and the fourth component 54 are plate-shaped.

[0024] (Example of saw assembly) The user can assemble the saw 10 by following the steps below. Here, we will describe an example of assembling the saw 10 without using the connecting member 30. First, we will describe the step of connecting the first handle portion 13 with the first saw blade 11 and the second saw blade 12. Before overlapping the first component piece 23 and the second component piece 24 of the first handle portion 13, 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.

[0025] Then, the first component 23 and the second component 24 are placed on top of each other. When this is done, the position of the mounting hole 36 of the first component 23 coincides with the position of the mounting hole 37 of the second component 24. Also, the position of the mounting hole 37 of the first component 23 coincides with the position of the mounting hole 36 of the second component 24. Furthermore, the position of the female screw hole 38 of the first component 23 coincides with the position of the female screw hole 39 of the second component 24. Furthermore, the position of the female screw hole 39 of the first component 23 coincides with the position of the female screw hole 38 of the second component 24. Furthermore, the position of the female screw hole 40 of the first component 23 coincides with the position of the female screw hole 41 of the second component 24. Furthermore, the position of the female screw hole 41 of the first component 23 coincides with the position of the female screw hole 40 of the second component 24. Furthermore, the position of the groove 31 of the first component 23 coincides with the position of the groove 32 of the second component 24. Furthermore, the position of the groove 32 of the first component 23 coincides with the position of the groove 31 of the second component 24.

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

[0027] As a result of the above process, the first saw blade 11 and the second saw blade 12 are sandwiched between the first component 23 and the second component 24, and the first component 23 and the second component 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. Therefore, the tightening force of the screw member 50 attached to the first handle portion 13 does not need to be such that a strong clamping force is applied to the first handle portion 13.

[0028] Next, the user screws the four screw members 51 into the female screw holes 38 and 39 and tightens them. Furthermore, the user screws the two remaining screw members 51 into the female screw holes 40 and 41 and tightens them. Once the user has finished tightening the screw members 50 and 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] Next, the process of connecting the second handle portion 14 with the first saw blade 11 and the second saw blade 12 will be explained. 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 first end of the second saw blade 12 is placed between the notches 33 and 34. Then, the third component piece 53 and the fourth component piece 54 are overlapped. As a result, the position of the mounting hole 36 of the third component piece 53 coincides with the position of the mounting hole 37 of the fourth component piece 54. Also, the position of the mounting hole 37 of the third component piece 53 coincides with the position of the mounting hole 36 of the fourth component piece 54.

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

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

[0032] As a result of the above process, the first saw blade 11 and the second saw blade 12 are clamped between the third component 53 and the fourth component 54, and the third component 53 and the fourth component 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 does not need to be such that a strong clamping force is applied to the second handle portion 14.

[0033] Next, the user screws the four screw members 51 into the female screw holes 38 and 39 and tightens them. Furthermore, the user screws the two remaining screw members 51 into the female screw holes 40 and 41 and tightens them. Once the user has finished tightening the screw members 50 and 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 saw usage) Figure 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 19 facing each other. The user inserts the object W1 between the first saw blade 11 and the second saw blade 12. The object W1 is the object to be cut with the saw 10, and its shape is a cylinder, cylindrical object, rod, etc. The material of the object W1 is wood, metal, synthetic resin, etc. It is assumed that the maximum outer diameter φ1 of the object W1 is less than the maximum value of the 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] Furthermore, the user can apply a force to the first handle portion 13 and the second handle portion 14 in the opposite direction along the first direction A1, as shown in Figure 5. The first direction A1 is the direction along the imaginary line B1 passing through the screw member 50 attached to the first handle portion 13, and the imaginary line B2 passing through the screw member 50 attached to the second handle portion 14. As a result, the angle θ1 between the saw teeth 15 of the first saw blade 11 and the imaginary line B1 changes. Also, the angle θ2 between the saw teeth 19 of the second saw blade 12 and the imaginary line B1 changes. In addition, the angle θ3 between the saw teeth 15 of the first saw blade 11 and the imaginary line B2 changes.

[0036] Furthermore, the angle θ4 between the saw teeth 19 of the second saw blade 12 and the imaginary line B2 changes. In other words, the distance L1 between the first saw blade 11 and the second saw blade 12 changes, specifically becoming narrower. To put it another way, the first saw blade 11, the second saw blade 12, the first handle portion 13, and the second handle portion 14 can operate in a state where they are connected like a link mechanism. In this way, the saw teeth 15 of the first saw blade 11 and the saw teeth 19 of the second saw blade 12 come into contact with the outer surface of the object W1, respectively.

[0037] The user then grips the first handle portion 13 with their hand and moves the saw 10 back and forth along the second direction C1. The second direction C1 is the direction along the saw teeth 15 and 19, and the saw teeth 15 and 19 bite into the outer 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 angles θ1 and θ4 increase and angles θ2 and θ3 decrease. In other words, the gap L1 narrows. 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 the start to the completion of cutting the object W1 can be shortened, and work efficiency is improved.

[0038] Furthermore, the user can manually operate the saw 10 to reciprocate the first saw blade 11 and the second saw blade 12. Therefore, a drive device, such as a drive system and gear structure, is not required, providing a saw 10 with a simple structure. Note that if the user operates the saw 10 such that angles θ1 and θ4 are reduced and angles θ2 and θ3 are increased, the gap L1 will widen.

[0039] (Effects of the embodiment) As shown in Figure 1, the saw 10 is configured such that the first handle portion 13 and the second handle portion 14 are approximately point-symmetric with respect to the point of symmetry P5. Also, as shown in Figure 2, the saw 10 is configured such that the first handle portion 13 and the second handle portion 14 are approximately point-symmetric with respect to the point of symmetry P6.

[0040] Furthermore, as shown in Figure 7(A), the first handle portion 13 is constructed with the first component 23 and the second component 24 being approximately point-symmetric with respect to the point of symmetry P1. Furthermore, as shown in Figure 7(B), the first handle portion 13 is constructed with the first component 23 and the second component 24 being approximately point-symmetric with respect to the point of symmetry P2.

[0041] Furthermore, as shown in Figure 8(A), the second handle portion 14 is constructed with the third component 53 and the fourth component 54 in approximately point symmetry around the symmetry point P3. Furthermore, as shown in Figure 8(B), the second handle portion 14 is constructed with the third component 53 and the fourth component 54 in approximately point symmetry around the symmetry point P4.

[0042] Furthermore, the first component 23 and the third component 53 have the same shape, structure, and dimensions. In addition, the second component 24 and the fourth component 54 have the same shape, structure, and dimensions. Furthermore, by rotating the first component 23 shown in Figure 7(A) by 180 degrees, it can be used as the second component 24. Furthermore, by rotating the third component 53 shown in Figure 8(A) by 180 degrees, it can be used as the fourth component 54. Furthermore, the first component 23 shown in Figure 7(A) can be used as the third component 53 shown in Figure 8(A). Furthermore, the second component 24 shown in Figure 7(A) can be used as the fourth component 54 shown in Figure 8(A).

[0043] With the above configuration, the saw 10 can share (standardize) its four components. Therefore, the number of man-hours required to manufacture the components of the saw 10 can be reduced, and the increase in the manufacturing cost of the components of the saw 10 can be suppressed.

[0044] Furthermore, if the components of the saw 10 are made of synthetic resin or metal, and the components are molded using a mold, the components can be mass-produced. Therefore, the number of steps required to manufacture the components of the saw 10 can be reduced, and the increase in the manufacturing cost of the components of the saw 10 can be suppressed.

[0045] Furthermore, the user can assemble and disassemble the saw 10 even if the mounting positions and orientations of the first component 23, the third component 53, the second component 24, and the fourth component 54 are changed relative to each other. Therefore, the user can easily assemble and disassemble the saw 10.

[0046] Furthermore, as shown in Figure 1, the saw 10 is configured such that the first handle portion 13 and the second handle portion 14 are approximately point-symmetric with respect to the point of symmetry P5. Also, as shown in Figure 2, the saw 10 is configured such that the first handle portion 13 and the second handle portion 14 are approximately point-symmetric with respect to the point of symmetry P6. Therefore, when the user grasps the first handle portion 13 and the second handle portion 14 with their left and right hands, the feel of operating the first handle portion 13 and the second handle portion 14 is the same, improving the work efficiency of cutting the object W1. When replacing one or both of the saw blades 11 and 12, it is only necessary 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 of saws) Figure 6 is a front view showing another example of the saw 10's use, specifically an example using the connecting member 30. 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 back 20 of the second saw blade 12 and the saw teeth 15 of the first saw blade 11 facing each other. The connecting member 30 is also connected to the first handle portion 13 and the second handle portion 14. The first end of the connecting member 30 is positioned between the groove 31 of the first component 23 and the groove 32 of the second component 24. The second end of the connecting member 30 is positioned between the groove 31 of the third component 53 and the groove 32 of the fourth component 54. The operation of connecting the connecting member 30 to the first handle portion 13 and the second handle portion 14, or the operation of removing the connecting 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, thereby separating or bringing the first handle portion 13 and the second handle portion 14 closer together. In other words, it can be done 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 in the example of use of the saw 10 described with reference to Figure 5. In other words, the clamping force applied to the first saw blade 11 and the second saw blade 12 from the first component 23, the second component 24, the third component 53, and the fourth component 54 is relatively large. When a force is applied to the first handle portion 13 and the second handle portion 14 in a direction that attempts to change the angles θ1, θ2, θ3, and θ4, the connecting member 30 engages with the first handle portion 13 and the second handle portion 14.

[0049] Therefore, the first handle portion 13 is not moved around the screw member 50 relative to the first saw blade 11, the second saw blade 12, and the connecting member 30. Similarly, the second handle portion 14 is not moved around 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 plays the role of fixing the distance L1 between the first saw blade 11 and the second saw blade 12 when the saw 10 is assembled. Consequently, the angles θ1, θ2, θ3, and θ4 are fixed at approximately 90 degrees.

[0050] The user then grasps the first handle portion 13 and the second handle portion 14 with their hands, and with the saw teeth 19 of the second saw blade 12 in contact with the object W1, they move the saw 10 back and forth along the second direction C1. This allows the second saw blade 12 to cut the object W1.

[0051] Alternatively, the first handle portion 13 and the second handle portion 14 may be connected with the back 16 of the first saw blade 11 and the saw teeth 19 of the second saw blade 12 facing each other. In this case, the first end of the connecting member 30 is positioned between the groove 32 of the first component 23 and the groove 31 of the second component 24. The second end of the connecting member 30 is positioned between the groove 32 of the third component 53 and the groove 31 of the fourth component 54. The user then grasps the first handle portion 13 and the second handle portion 14 with their hands and moves the saw 10 back and forth along the second direction C1 with the saw teeth 15 of the first saw blade 11 in contact with the object W1. This allows the first saw blade 11 to cut the object W1.

[0052] (Example of change) The fixing structure for securing the components of the first handle may be different from a screw member, nut, or female screw hole. For example, the fixing structure may have recesses and protrusions provided on the first and second components, respectively, and the recesses and protrusions may be configured to engage and disengage with each other. Similarly, the fixing structure for securing the components of the second handle may be different from a screw member, nut, or female screw hole. For example, the fixing structure may have recesses and protrusions provided on the third and fourth components, respectively, and the recesses and protrusions may be configured to engage and disengage with each other.

[0053] Furthermore, the fixing structure for securing the first and second components of the first handle portion may include fixing with adhesive. In addition, the fixing structure for securing the third and fourth components of the second handle portion may also include fixing with adhesive. The first and second saw blades may be connected to the first and second handle portions by screw members.

[0054] Furthermore, if the material of the first, second, third, and fourth components is metal, the fixing structure for fixing the first and second components may include fixing by soldering or welding. Furthermore, the fixing structure for fixing the third and fourth components may also include fixing by soldering or welding. The first and second saw blades may be connected to the first and second handle portions by screw members.

[0055] Furthermore, if the assembled saw 10 is not disassembled and the connecting member 30 is not used, rivets can be used instead of screw members 50 and nuts 52 for the fixing members that secure the first component 23 and the second component 24, and for the fixing members that secure the third component 53 and the fourth component 54. In this case, the gap 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 with reference to the drawings, and can be modified in various ways without departing from its essence. For example, in a front view of the saw, the outer periphery shapes of the first, second, third, and fourth components include, for example, a square, an ellipse, a crescent, etc. The cross-sectional shape of the object includes a circle, a square, 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, 14...Second handle, 23...First component piece, 24...Second component piece, 53...Third component piece, 54...Fourth component piece, 30...Connecting member, L1...Spacing

Claims

1. A strip-shaped first saw blade for cutting the object, A strip-shaped second saw blade that cuts an object by sandwiching it together with the first saw blade, Connected to both ends of the first saw blade in the longitudinal direction and both ends of the second saw blade in the longitudinal direction, and supporting the first saw blade and the second saw blade so as to be movable in the longitudinal direction, and while maintaining the first saw blade and the second saw blade parallel to each other, the distance between the first saw blade and the second saw blade can be changed, and a handle portion for operation by the user by hand, It has, The aforementioned handle portion is, A first handle portion connected to the first longitudinal end of the first saw blade and the first longitudinal end of the second saw blade, A second handle portion connected to the second end in the longitudinal direction of the first saw blade and the second end in the longitudinal direction of the second saw blade, Equipped with, The first handle portion is, The first component and A second component is positioned on top of the first component and sandwiches the first longitudinal end of the first saw blade and the first longitudinal end of the second saw blade together with the first component, It has, The second handle portion is, The third component piece, A fourth component is positioned on top of the third component and sandwiches the second longitudinal end of the first saw blade and the second longitudinal end of the second saw blade together with the third component, It has, A saw wherein the first, second, third, and fourth components are all the same in shape, structure, and dimensions.

2. The saw according to claim 1, A saw further provided with a connecting member that is connected to the first handle portion and the second handle portion, and that fixes 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