Welding tool

Abstract

To reduce labor required for welding and cutting of an excess part after welding, and to shorten working hours.SOLUTION: There is provided a welding tool that uses heat to weld a sheet-shaped area made of resin in which the area is superimposed on each other, comprising: a rod-shaped first clamping portion and a rod-shaped second clamping portion; a connecting portion having a rotation shaft and connecting one end of each of the first clamping portion and the second clamping portion so as to be relatively rotatable around the rotation shaft; a pressing body provided on the other end side of the first clamping portion or the second clamping portion and capable of pressing the sheet-like area sandwiched between the first clamping portion and the second clamping portion; a cutting blade disposed closer to the connecting portion than the pressing body or a position corresponding to the pressing body in the first clamping portion or the second clamping portion; a first heater for heating the pressing body; and a second heater for heating the cutting blade.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a welding tool for welding resin sheet-like regions superposed on each other by using heat.

Background Art

[0002] For example, when manually sorting and packing small parts used in products at the manufacturing site, after putting the parts into a substantially rectangular resin bag having an opening at one end, the opening is closed and bent toward the other end side, and the bent one end is fixed to the side surface of the bag with tape.

[0003] However, when the adhesive force of the tape is weak, the tape peels off and the packed parts come out of the bag. Further, it is cumbersome to manually perform the operation of bending one end of the bag and the operation of cutting out the tape and fastening the bent one end to the side surface of the bag with the tape.

[0004] On the other hand, a hand-held heat sealer is known which has a rotary heating mechanism and a receiving base, and presses and heats a linear portion in a workpiece to be welded by the rotary heating mechanism and the receiving base while moving in a predetermined direction, thereby welding the linear portion (see, for example, Patent Document 1).

[0005] When welding and closing a resin bag having an opening at one end with this heat sealer, for example, a linear portion near the opening is pressed and heated. At this time, if the linear portion to be welded is formed slightly on the other end side rather than one end of the bag, a shallow-bottomed bag-shaped surplus portion is formed between the welded linear portion and one end of the bag.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In order to cut off this surplus portion, it is necessary to use a cutter or scissors separately from the heat sealer, which takes extra time and effort. The present invention has been made in view of such problems, and aims to reduce the time and effort required for welding and cutting the surplus portion after welding, and to shorten the working time.

Means for Solving the Problems

[0008] According to one aspect of the present invention, there is provided a welding tool for welding resin sheet-like regions overlapped with each other using heat, the welding tool including: first and second rod-shaped clamping portions; a connecting portion having a rotation axis and connecting one end portion of each of the first and second clamping portions so as to be relatively rotatable around the rotation axis; a pressing body provided on the other end side of the first clamping portion or the second clamping portion and capable of pressing the sheet-like region sandwiched between the first and second clamping portions; a cutting blade disposed on the first clamping portion or the second clamping portion on the side of the connecting portion rather than the position corresponding to the pressing body; a first heater for heating the pressing body; and a second heater for heating the cutting blade. The pressing body is fixed to the first heater via a fixing member, heat is transferred from the first heater to the pressing body via the fixing member, the cutting blade is in direct contact with the second heater, and heat is transferred from the second heater to the cutting blade. When the first and second clamping portions are slid along a predetermined direction orthogonal to the longitudinal direction of the first clamping portion with the sheet-like region sandwiched between the first and second clamping portions, a first linear portion of the sheet-like region pressed by the pressing body is welded, and a second linear portion of the sheet-like region contacting the cutting blade is cut. A welding tool is provided. Preferably, the welding tool is provided on the other clamping part different from the clamping part on which the pressing body is provided among the first clamping part and the second clamping part, and is provided at a position corresponding to the pressing body when the other end sides of the first clamping part and the second clamping part are brought closer together. A first receiving part, provided on the other clamping part different from the clamping part on which the cutting blade is provided among the first clamping part and the second clamping part, and provided at a position corresponding to the cutting blade when the other end sides of the first clamping part and the second clamping part are brought closer together. A second receiving part, a third heater for heating the first receiving part, and a fourth heater for heating the second receiving part. When the first heater and the second heater are the same heater, the third heater and the fourth heater are the same heater. When the first heater and the fourth heater are the same heater, the second heater and the third heater are the same heater. 。

Advantages of the Invention

[0009] When using the welding tool according to one aspect of the present invention, with the sheet-like regions overlapped with each other being sandwiched between the first clamping portion and the second clamping portion, when sliding the first clamping portion and the second clamping portion along a predetermined direction orthogonal to the longitudinal direction of the first clamping portion, the first linear portion pressed by the pressing body in the sheet-like region is welded, and the second linear portion contacting the cutting blade in the sheet-like region is cut. In this way, welding and cutting can be performed simultaneously, so the labor required for welding and cutting can be reduced, and the working time can be shortened.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0011] With reference to the accompanying drawings, embodiments according to one aspect of the present invention will be described. FIG. 1 is a perspective view of an open state of a handheld heat sealer (welding tool) 2 according to a first embodiment. The heat sealer 2 is used for welding sheet-like regions together by applying heat and pressing on both sides of resin-made sheet-like regions that are overlapped with each other.

[0012] The sheet-like regions overlapped with each other are, for example, a first sheet-like region 11b and a second sheet-like region 11c that constitute a bag 11 (see FIG. 4(A)) having a mouth portion 11a. The first sheet-like region 11b and the second sheet-like region 11c are formed of, for example, synthetic resin.

[0013] As the material of the synthetic resin, for example, polyolefins such as polyethylene (PE) and polypropylene (PP), polyesters such as polyethylene terephthalate (PET), polyamides such as nylon, and polyvinyl chloride (PVC) can be used.

[0014] The heat sealer 2 has a first housing (first clamping portion) 4 and a second housing (second clamping portion) 6, each of which is in the shape of a prismatic rod formed of resin. The first housing 4 and the second housing 6 are formed by, for example, a 3D printer, but may also be formed by other methods such as injection molding.

[0015] The first housing 4 and the second housing 6 have a long side A1 of about 10 cm to 20 cm, a short side A2 of about 2 cm to 3 cm, and a thickness A3 of about 2 cm to 3 cm. One surface 4a of the first housing 4 and one surface 6a of the second housing 6 are arranged to face each other.

[0016] At one end 4b on one side 4a of the first housing 4, a shaft portion 10 having a rotation shaft 8 is fixed. A pair of bearings 12 are provided on both sides of the shaft portion 10. Each bearing 12 is fixed to one end 6b on one side 6a of the second housing 6.

[0017] The shaft portion 10 and the pair of bearings 12 function as a connecting portion 14 that connects the first housing 4 and the second housing 6 so as to be relatively rotatable around the rotation shaft 8.

[0018] One end of a compression coil spring 16 is fixed at a predetermined position on one side 4a closer to the other end 4c than the shaft portion 10, and the other end of the compression coil spring 16 is fixed at a predetermined position on one side 6a closer to the other end 4c than the shaft portion 10.

[0019] The compression coil spring 16 pushes out the first housing 4 and the second housing 6 so that the other end 4c and the other end 6c move away from each other, and the first housing 4 and the second housing 6 are in an open state where they are opened by a predetermined angle 18 around the rotation shaft 8.

[0020] On the other hand, when an operator holds the first housing 4 and the second housing 6 with a hand (for example, one hand) and compresses the compression coil spring 16, the other ends 4c, 6c approach each other. Finally, when one sides 4a, 6a become substantially parallel, the heat sealer 2 is in a closed state (see Fig. 3(A)).

[0021] As shown in Fig. 1, in the longitudinal direction B1 of the first housing 4 along the long side A1, on the other end 4c side of one side 4a of the first housing 4, a disc-shaped roller (pressing body) 20 made of a metal such as stainless steel and having a predetermined thickness is provided. The roller 20 is disposed at substantially the center of the short side A2, and its rotation axis is substantially parallel to the longitudinal direction B1.

[0022] The roller 20 has a bearing at the central portion in its radial direction. A metal shaft portion 22 (see Fig. 2) arranged along the longitudinal direction B1 of the first housing 4 is inserted into the bearing of the roller 20, and the roller 20 is rotatable around the shaft portion 22.

[0023] On one side 4a of the first housing 4, a recess (not shown) is formed, and a part of the roller 20 is located inside the first housing 4 rather than on the one side 4a of the first housing 4. As shown in FIG. 2, both ends of the shaft portion 22 are bent approximately 90 degrees along the direction of the thickness A3 of the first housing 4 and are located inside the first housing 4 rather than the roller 20.

[0024] FIG. 2 is a partially sectional side view showing an enlarged view of the other end 4c of the first housing 4. Inside the first housing 4, a plate-shaped ceramic heater (first heater and second heater) 24 for heating the roller 20 is provided. Both ends of the shaft portion 22 are fixed to the ceramic heater 24 by a fixing member 26 formed of a silicone rubber having relatively high thermal conductivity.

[0025] The silicone rubber having relatively high thermal conductivity includes, for example, a quick-drying silicone adhesive that can be cured at room temperature and a filler such as silica having higher thermal conductivity than a resin such as the cured silicone adhesive, and has a thermal conductivity of 0.8 [W / (m·K)] or more in a cured state.

[0026] As such a silicone rubber, as an example, a silicone adhesive sealing material (product number: TSE3941M) sold by Momentive Performance Materials Japan Co., Ltd. can be used.

[0027] The shaft portion 22 of the present embodiment is fixed by the fixing member 26 in a manner of sandwiching the fixing member 26 between the shaft portion 22 and the ceramic heater 24. Therefore, the heat of the ceramic heater 24 is indirectly transmitted to the shaft portion 22 and the roller 20 through the fixing member 26.

[0028] Therefore, the roller 20 can be pressed while heating the welding target. However, due to the intervening fixing member 26, the temperature of the roller 20 becomes lower than the temperature of the ceramic heater 24. For example, when the welding target is formed of polyethylene (PE), the ceramic heater 24 is heated to about 180°C. At this time, the roller 20 becomes about 160°C.

[0029] However, the temperature of the ceramic heater 24 may be appropriately adjusted according to the material to be welded. By making the temperature of the roller 20 lower than that of the ceramic heater 24, excessive melting of the material to be welded can be prevented.

[0030] Note that in the drawings, the ceramic heater 24 is simplified, and the wiring and the like provided in the ceramic heater 24 are omitted. The ceramic heater 24 is supplied with power from an AC power supply (not shown) via an AC-DC adapter (not shown).

[0031] In this way, since the ceramic heater 24 of the present embodiment is heated using an AC power supply instead of a dry battery, the size of the first housing 4 can be made smaller and lighter compared to the case where a power supply unit such as a dry battery or a fuel unit such as liquid fuel is arranged in the first housing 4.

[0032] On the side of the connecting portion 14 by a predetermined distance (for example, about 5 mm) from the roller 20, a disc-shaped cutting blade 28 made of a metal such as stainless steel and thinner than the roller 20 is provided. One surface of the cutting blade 28 is arranged so as to be orthogonal to the longitudinal direction B1 of the first housing 4.

[0033] In the thickness A3 direction of the first housing 4, a part of the cutting blade 28 protrudes outside one surface 4a of the first housing 4. Another part of the cutting blade 28 is located inside one surface 4a of the first housing 4 and is fixed to the ceramic heater 24 by a fixing member 26 in the same manner as the roller 20.

[0034] The cutting blade 28 is fixed by the fixing member 26 in a manner of directly contacting the ceramic heater 24. Therefore, the heat of the ceramic heater 24 is directly transmitted to the cutting blade 28. For example, when the ceramic heater 24 is heated to about 180 °C, the cutting blade 28 also becomes about 180 °C.

[0035] Since the cutting blade 28 can cut a portion to be cut of the resin sheet-like region while softening or melting it by heat, the sheet-like region can be cut relatively easily as compared with the case where the cutting blade 28 is not heated. In the present embodiment, the tip of the cutting blade 28 protrudes by a predetermined length (for example, about 1 mm) toward the second housing 6 side as compared with the tip of the roller 20.

[0036] Returning to FIG. 1 again, a first receiving portion 30 formed of silicone rubber having relatively high thermal conductivity is provided on one surface 6a of the second housing 6. Further, a second receiving portion 32 is provided on the one surface 6a on the connecting portion 14 side rather than the first receiving portion 30.

[0037] In the present embodiment, the second receiving portion 32 is integrally formed of silicone rubber having relatively high thermal conductivity with the first receiving portion 30. The heights of the first receiving portion 30 and the second receiving portion 32 are substantially the same, but may be different.

[0038] FIG. 3(A) is a side view of the heat sealer 2 in the closed state, and FIG. 3(B) is a front view of the heat sealer 2 in the closed state. When the compression coil spring 16 is compressed to close the heat sealer 2, the surfaces 4a and 6a approach each other to a predetermined distance C and become substantially parallel.

[0039] At this time, the roller 20 approaches with a slight gap interposed therebetween with the first receiving portion 30, and the cutting blade 28 contacts or cuts into the second receiving portion 32. In FIGS. 3(A) and 3(B), the gap between the roller 20 and the first receiving portion 30 is omitted, but this gap is adjusted to be slightly smaller than the thickness of the sheet-like region overlapped with each other.

[0040] A concave portion (not shown) is formed on the one surface 6a side of the second housing 6, and a plate-like ceramic heater 34 for heating the first receiving portion 30 and the second receiving portion 32 is provided inside the one surface 6a of the second housing 6. In the drawing, the ceramic heater 34 is simplified and its wiring and the like are omitted.

[0041] The ceramic heater 34 is heated in the same manner as the ceramic heater 24. Among the first receiving part 30 and the second receiving part 32, the surface located on the side opposite to the ceramic heater 34 in the thickness direction is heated to a temperature lower than that of the ceramic heater 34.

[0042] For example, when the ceramic heater 34 is heated to about 180 °C, the temperatures of the surfaces of the first receiving part 30 and the second receiving part 32 are about 160 °C. However, the temperature of the ceramic heater 34 may be adjusted as appropriate according to the material to be welded.

[0043] By making the temperatures of the surfaces of the first receiving part 30 and the second receiving part 32 lower than the temperature of the ceramic heater 34, it is possible to soften the sheet-like region in contact with the surface while preventing excessive melting of the contact portion.

[0044] In this embodiment, since power is also supplied to the ceramic heater 34 via an AC-DC adapter, the size of the second housing 6 can be made smaller and lighter compared to the case where a power supply unit such as a dry battery or a fuel unit such as liquid fuel is arranged in the second housing 6.

[0045] As shown in FIG. 3(A), a plug insertion hole 36 into which a plug (not shown) of an AC-DC adapter (not shown) is inserted is provided on the side surface of the second housing 6. Further, on the other surface 6d side located on the side opposite to one surface 6a of the second housing 6, a manual switch 38 for switching on / off is provided.

[0046] On the other surface 6d side, in addition to the switch 38, a first LED lamp 40 that lights up in red when the temperatures of the ceramic heaters 24 and 34 rise and a second LED lamp 42 that lights up in white when the ceramic heaters 24 and 34 are kept warm are also provided.

[0047] Next, with reference to FIGS. 4(A) to 6(B), the method of using the heat sealer 2 will be described. First, after turning on the switch 38 of the heat sealer 2, as shown in FIG. 4(A), the vicinity of the mouth portion 11a of the resin bag 11 is placed on the first receiving portion 30 and the second receiving portion 32 (placement step).

[0048] FIG. 4(A) is a view showing a state in which a part of the bag 11 is disposed between a pair of other end portions 4c and 6c of the heat sealer 2. The bag 11 may be formed of a single resin sheet or may be formed of two or more resin sheets. In any case, in the region sandwiched by the heat sealer 2, at least two resin sheet-like regions are overlapped with each other.

[0049] In the example shown in FIGS. 4(A) and 4(B), the first sheet-like region 11b and the second sheet-like region 11c are overlapped with each other. After the placement step, the operator holds the heat sealer 2 by hand, compresses the compression coil spring 16, and brings the surfaces 4a and 6a closer to each other by a predetermined distance C (clamping step).

[0050] FIG. 4(B) is a view showing a state in which a part of the bag 11 is sandwiched between a pair of other end portions 4c and 6c of the heat sealer 2. In the clamping step, a part of the first sheet-like region 11b and the second sheet-like region 11c located in the vicinity of the mouth portion 11a is heated and pressed by the roller 20 and the first receiving portion 30. At the same time, the vicinity of the same part is cut by the cutting blade 28 and the second receiving portion 32.

[0051] After the clamping step, the heat sealer 2 is slid along a predetermined direction B2 that is perpendicular to the longitudinal direction B1 and parallel to the short side A2. FIG. 5(A) is a view showing a state in which the heat sealer 2 is slid along the predetermined direction B2, and FIG. 5(B) is a view showing a state in which the mouth portion 11a is substantially closed by the heat sealer 2.

[0052] In the sliding step, in the first sheet-like region 11b and the second sheet-like region 11c, the first linear portion 11d pressed by the roller 20 is welded to each other, and the second linear portion 11e contacting the cutting blade 28 is cut (see Fig. 6(A)).

[0053] Fig. 6(A) is a diagram showing the heat welding region (the first linear portion 11d) and the cutting region (the second linear portion 11e). In Fig. 6(A), the second linear portion 11e is shown by a broken line. Fig. 6(B) is a diagram showing the state where the surplus portion 13 is separated at the second linear portion 11e as a boundary.

[0054] In the present embodiment, since welding and cutting can be performed simultaneously using the roller 20 and the cutting blade 28, the labor required for welding and cutting can be reduced. Further, the working time can be shortened as compared with the case where welding and cutting are performed individually.

[0055] In addition, by simultaneously heating and pressing both side surfaces (the first sheet-like region 11b, the second sheet-like region 11c) of the bag 11 by the roller 20 and the first receiving portion 30, the first linear portion 11d of the bag 11 can be welded more reliably as compared with the case where only the roller 20 is heated.

[0056] Furthermore, by simultaneously heating and cutting both side surfaces of the bag 11 by the cutting blade 28 and the second receiving portion 32, the second linear portion 11e of the bag 11 can be cut more easily as compared with the case where only the cutting blade 28 is heated.

[0057] Also, in the present embodiment, the roller 20 and the cutting blade 28 are simultaneously heated by one ceramic heater 24, but the temperature of the roller 20 can be made lower than the temperature of the cutting blade 28, so that while preventing excessive melting of the heat welding region, smooth cutting can be performed in the cutting region.

[0058] Next, a second embodiment will be described. FIG. 7(A) is a partially sectional side view showing an enlarged other end portion 4c of the first housing 4 according to the second embodiment, and FIG. 7(B) is a front view of the heat sealer 2 according to the second embodiment.

[0059] As shown in FIG. 7(A), in the first housing 4 of the second embodiment, instead of the roller 20, a sphere (pressing body) 44 made of a metal such as stainless steel is provided. The sphere 44 is fixed to the ceramic heater 24 by a fixing member 26.

[0060] The sphere 44 is fixed by the fixing member 26 in such a manner that the fixing member 26 is sandwiched between the sphere 44 and the ceramic heater 24. Therefore, the heat of the ceramic heater 24 is indirectly transmitted to the sphere 44 via the fixing member 26.

[0061] As shown in FIG. 7(B), when the heat sealer 2 is in the closed state, the sphere 44 approaches with a slight gap between it and the first receiving portion 30, and the cutting blade 28 contacts or cuts into the second receiving portion 32. However, in FIG. 7(B), the gap between the sphere 44 and the first receiving portion 30 is omitted.

[0062] Also in the second embodiment, since welding and cutting can be performed simultaneously using the sphere 44 and the cutting blade 28, the labor required for welding and cutting can be reduced. Furthermore, the working time can be shortened compared to the case where welding and cutting are performed individually.

[0063] In addition, both sides of the bag 11 can be simultaneously heated and pressed by the roller 20 and the first receiving portion 30, and both sides of the bag 11 can be simultaneously heated and cut by the cutting blade 28 and the second receiving portion 32.

[0064] Also, although the roller 20 and the cutting blade 28 are simultaneously heated by one ceramic heater 24, the temperature of the roller 20 can be made lower than the temperature of the cutting blade 28, so that while preventing excessive melting in the heat welding region, smooth cutting can be performed in the cutting region.

[0065] Next, a third embodiment will be described. FIG. 8(A) is a partial cross-sectional side view showing an enlarged view of the other end portion 4c of the first housing 4 according to the third embodiment, and FIG. 8(B) is a front view of the heat sealer 2 according to the third embodiment.

[0066] The spherical body 44 is rotatably held in an arbitrary direction by a metal holding portion 46 having a spherical concave portion. Therefore, when the heat sealer 2 is slid along the predetermined direction B2 in the sliding step, the spherical body 44 is rotatable around the rotation axis 44a along the longitudinal direction B1.

[0067] In the third embodiment, since the heat sealer 2 can be slid more smoothly in the sliding step, the welding and cutting operations become easier compared to the second embodiment.

[0068] The holding portion 46 is fixed by the fixing member 26 in a manner that sandwiches the fixing member 26 between the holding portion 46 and the ceramic heater 24. Therefore, the heat of the ceramic heater 24 is indirectly transmitted to the holding portion 46 and the spherical body 44 via the fixing member 26.

[0069] Next, various modifications of the first embodiment will be described. FIG. 9 is a partial cross-sectional side view showing an enlarged view of the other end portions 4c and 6c of the heat sealer 2 according to the first modification. Note that FIG. 9 shows the heat sealer 2 in a closed state, similar to FIG. 3(A).

[0070] The roller 20 is provided on the other end portion 4c side of the first housing 4, and the shaft portion 22 is fixed to the ceramic heater 24 via a first fixing member 26a formed of silicone rubber having relatively high thermal conductivity.

[0071] On the connecting portion 14 side of the roller 20, a second receiving portion 32 for receiving the cutting blade 28 is provided when the heat sealer 2 is in the closed state. The second receiving portion 32 is formed of silicone rubber having relatively high thermal conductivity, similar to the first fixing member 26a, and is integrally formed with the first fixing member 26a.

[0072] On the other hand, in the second housing 6, a first receiving portion 30 is provided at a position corresponding to the roller 20 when the heat sealer 2 is in the closed state. Further, in the second housing 6, a cutting blade 28 is disposed on the side of the connecting portion 14 rather than the first receiving portion 30.

[0073] The cutting blade 28 is fixed in a manner of contacting the ceramic heater 34 with a second fixing member 26b formed of silicone rubber having relatively high thermal conductivity. The second fixing member 26b is integrally formed with the first receiving portion 30.

[0074] In the first modification, the ceramic heater 24 functions as a first heater for heating the roller 20 and a fourth heater for heating the second receiving portion 32. Further, the ceramic heater 34 functions as a third heater for heating the first receiving portion 30 and a second heater for heating the cutting blade 28.

[0075] In the first modification, when the heat sealer 2 is in the closed state, the roller 20 approaches with a slight gap therebetween from the first receiving portion 30 (see the lower arrow in FIG. 9), and the cutting blade 28 contacts or cuts into the second receiving portion 32 (see the upper arrow in FIG. 9).

[0076] Next, a second modification will be described. FIG. 10 is a partially enlarged cross-sectional side view of the other ends 4c, 6c of the heat sealer 2 according to the second modification. The roller 20 is provided on the side of the other end 6c of the second housing 6, and the shaft portion 22 is fixed to the ceramic heater 34 via the first fixing member 26a.

[0077] On the side of the connecting portion 14 of the roller 20, a second receiving portion 32 is integrally formed with the first fixing member 26a. On the other hand, in the first housing 4, a first receiving portion 30 is provided at a position corresponding to the roller 20 when the heat sealer 2 is in the closed state.

[0078] Also, in the first housing 4, a cutting blade 28 is disposed on the side of the connecting portion 14 rather than the position of the first receiving portion 30. The cutting blade 28 is fixed in a manner of contacting the ceramic heater 34 with the second fixing member 26b. The second fixing member 26b is integrally formed with the first receiving portion 30.

[0079] In the second modification, the ceramic heater 24 functions as a third heater for heating the first receiving portion 30 and a second heater for heating the cutting blade 28. Further, the ceramic heater 34 functions as a first heater for heating the roller 20 and a fourth heater for heating the second receiving portion 32.

[0080] In the second modification, when the heat sealer 2 is in the closed state, the roller 20 approaches with a slight gap interposed therebetween from the first receiving portion 30 (see the upper arrow in FIG. 10), and the cutting blade 28 contacts or cuts into the second receiving portion 32 (see the lower arrow in FIG. 10).

[0081] Next, a third modification will be described. FIG. 11 is a partially sectional side view showing an enlarged view of the other ends 4c, 6c of the heat sealer 2 according to the third modification. The roller 20 is provided on the side of the other end 6c of the second housing 6 in the same manner as in the second modification, and the shaft portion 22 is fixed to the ceramic heater 34 via the fixing member 26.

[0082] In the second housing 6, a cutting blade 28 is disposed on the side of the connecting portion 14 rather than the roller 20, and is fixed in a manner of contacting the ceramic heater 34 with the fixing member 26. On the other hand, in the first housing 4, a first receiving portion 30 is provided at a position corresponding to the roller 20 when the heat sealer 2 is in the closed state.

[0083] Also, in the first housing 4, a second receiving portion 32 is disposed on the side of the connecting portion 14 rather than the position of the first receiving portion 30. The first receiving portion 30 and the second receiving portion 32 are integrally formed.

[0084] In the third modification, the ceramic heater 24 functions as a third heater that heats the first receiving portion 30 and a fourth heater that heats the second receiving portion 32. Further, the ceramic heater 34 functions as a first heater that heats the roller 20 and a second heater that heats the cutting blade 28.

[0085] In the third modification, when the heat sealer 2 is in the closed state, the roller 20 approaches with a slight gap therebetween from the first receiving portion 30 (see the upper arrow in FIG. 11), and the cutting blade 28 contacts or cuts into the second receiving portion 32 (see the upper arrow in FIG. 11).

[0086] In addition, the structures, methods, etc. according to the above-described embodiments can be appropriately modified and implemented without departing from the scope of the object of the present invention. For example, the modifications of the first to third can also be applied to each of the second and third embodiments.

Explanation of Reference Numerals

[0087] 2: Heat sealer (welding tool) 4: First housing (first clamping portion), 4a: One surface, 4b: One end portion, 4c: The other end portion 6: Second housing (second clamping portion), 6a: One surface, 6b: One end portion, 6c: The other end portion 6d: The other surface, 8: Rotation shaft, 10: Shaft portion 11: Bag, 11a: Mouth portion, 11b: First sheet-like region, 11c: Second sheet-like region 11d: First linear portion, 11e: Second linear portion, 13: Excess portion 12: Bearing, 14: Connecting portion, 16: Compression coil spring, 18: Angle 20: Roller (pressing body), 22: Shaft portion, 24: Ceramic heater 26: Fixed member, 26a: First fixed member, 26b: Second fixed member, 28: Cutting blade 30: First receiving portion, 32: Second receiving portion, 34: Ceramic heater 36: Plug insertion hole, 38: Switch 40: First LED lamp, 42: Second LED lamp 44: Sphere (pressing body), 44a: Rotation axis, 46: Holding part A1: Long side, A2: Short side, A3: Thickness, B1: Longitudinal direction, B2: Predetermined direction, C: Distance

Claims

1. A welding tool for welding resin sheet-like regions that are overlapped with each other using heat, comprising: each of a rod-shaped first clamping portion and a second clamping portion; a connecting portion having a rotation axis and connecting one end portion of each of the first clamping portion and the second clamping portion so as to be relatively rotatable around the rotation axis; a pressing body provided on the other end side of the first clamping portion or the second clamping portion and capable of pressing the sheet-like region sandwiched between the first clamping portion and the second clamping portion; a cutting blade disposed on the first clamping portion or the second clamping portion on the side of the connecting portion rather than at a position corresponding to the pressing body; a first heater for heating the pressing body; a second heater for heating the cutting blade; The pressing body is fixed to the first heater via a fixing member, and heat is transmitted from the first heater to the pressing body via the fixing member. The cutting blade is in direct contact with the second heater, and heat is transmitted from the second heater to the cutting blade. When the first clamping portion and the second clamping portion are slid along a predetermined direction orthogonal to the longitudinal direction of the first clamping portion with the sheet-like region sandwiched between the first clamping portion and the second clamping portion, a first linear portion of the sheet-like region pressed by the pressing body is welded, and a second linear portion of the sheet-like region that contacts the cutting blade is cut. A welding tool characterized by this.

2. A first receiving portion provided on the other clamping portion different from the clamping portion on which the pressing body is provided among the first clamping portion and the second clamping portion, and provided at a position corresponding to the pressing body when the other end sides of the first clamping portion and the second clamping portion are brought closer; A second receiving portion provided on the other clamping portion different from the clamping portion on which the cutting blade is provided among the first clamping portion and the second clamping portion, and provided at a position corresponding to the cutting blade when the other end sides of the first clamping portion and the second clamping portion are brought closer; A third heater for heating the first receiving portion; A fourth heater for heating the second receiving portion; and When the first heater and the second heater are the same heater, the third heater and the fourth heater are the same heater. When the first heater and the fourth heater are the same heater, the welding tool according to claim 1, characterized in that the second heater and the third heater are the same heater. When the first heater and the fourth heater are the same heater, the second heater and the third heater are the same heater. The welding tool according to claim 1, characterized in that the second heater and the third heater are the same heater. ​

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