U-shaped nail and driving tool

Abstract

The invention provides a U-shaped nail and a driving tool. The clevis (5) has a pair of legs (6) extending substantially parallel. The base ends of the pair of leg parts (6) are connected to each other by a crown part (7). The width of the crown part (7) is larger than the interval between the pair of leg parts (6). A planar top surface (7b) is formed on the crown part (7), and the top surface (7b) faces the opposite direction of the pair of leg parts (6). Therefore, the invention provides the U-shaped nail which is not easy to incline or deviate when the U-shaped nail is knocked in.

Description

TECHNICAL FIELD

[0001] The present application relates to a staple and a driving tool for driving the staple into a driven material. BACKGROUND

[0002] A staple is, for example, in the shape of a U letter, and is used to mount a mounting member on a mounted member. As one type of staple, a fencing staple is known, which mounts a fence composed of a wire made of metal to a wooden support post. The staple is driven by a drive of a driving tool. The staples described in Patent Documents 1, 2 and 3 have a crown portion (staple crown) in the shape of an arch, and a pair of leg portions (staple legs) extending in parallel from both ends of the crown portion. The striking surface of the drive is in the shape of a concave curve corresponding to the shape of the crown portion of the staple. However, the striking force received by the staple from the drive can sometimes be uneven in the width direction due to a shape deviation of the crown portion of the staple or the like. Therefore, the staple can be driven in a state of being inclined with respect to the driving direction, or being misaligned in the width direction. As a result, a driving defect of the staple can occur. [Related Art Documents] [Patent Documents]

[0003] Patent Document 1: U.S. Patent No. 9121427 Patent Document 2: U.S. Patent No. 11073174 Patent Document 3: U.S. Patent Application Publication No. 2023 / 0407900 SUMMARY [Problems to be Solved by the Invention]

[0004] Therefore, there is a demand in the related art for a staple which is less likely to be inclined or misaligned when driven. [Means of Solving the Problems]

[0005] According to one aspect of the present application, a staple has a pair of leg portions extending in substantially parallel. Base ends of the pair of leg portions are connected to each other by a crown portion. The crown portion has a width wider than the interval between the pair of leg portions. A flat top surface is formed in the crown portion, which faces in a direction opposite to the pair of leg portions. Therefore, the staple is struck at the top surface, and is thus easily struck by a drive of a driving tool in a flat surface contact. Thus, the staple is easily subjected to a uniform striking force in the width direction. In this way, the staple is less likely to be inclined or misaligned when driven. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1This is a left view of the tool after the left side housing of the first embodiment of the present invention has been removed. Figure 2 yes Figure 1 Section II-II. Figure 3 It is a 3D diagram showing the driver and the U-shaped nail. Figure 4 This is a bottom view of the U-shaped nails being inserted into the channel. Figure 5 This is a 3D diagram of a U-shaped nail. Figure 6 This is a schematic diagram showing the state of a U-shaped nail being driven into the material. Figure 7 This is a bottom view of the U-shaped nail involved in the second embodiment. Figure 8 yes Figure 7 The image shows a 3D view of the U-shaped nail. Figure 9 This is a bottom view of the U-shaped nail involved in the third embodiment. Figure 10 yes Figure 9 The image shows a 3D view of the U-shaped nail. Figure 11 This is a bottom view of the U-shaped nail involved in the fourth embodiment. Figure 12 yes Figure 11 The image shows a 3D view of the U-shaped nail. [Explanation of reference numerals in the attached figures] 10: driving tool; 11: nail magazine; 12: handle; 13: trigger; 13a: trigger switch; 14: battery mounting portion; 15: battery pack; 16: drive portion housing; 17: connecting portion; 18: controller; 19: contact arm; 1: tool main body; la: housing; lb: cylinder; lc: piston; Id: pressure accumulating chamber; le: driving head portion; If: driving passage; lg: side wall portion; lh: discharge port; li: damper; 2: motor; 2a: reduction gear set; 2b: lifting mechanism; 2c: wheel portion; 2d: engaging portion; 2e: rear end pin; 3: driver; 3a: top portion; 3b: striking face; 3c: engaged portion; 3d: front end rack; 4: connecting type U-nail; 4a: connecting portion; 5: U-nail; 6: leg portion; 6a: left side inclined face; 6b: right side inclined face; 6c: adhesive; 6d: top end portion; 6e: folded back portion; 6f: flat face; 6g: protruding end; 6h: tapered face; 6i: recessed portion; 7: crown portion; 7a: straight line portion; 7b: top face; 7c: curved line portion; 7d: outer side face; 7e: space; W: driven material; Y: wire; 21: U-nail; 22: crown portion; 22a: first curved line portion; 22b: oblique line portion; 22c: second curved line portion; 22d: outer side face; 31: U-nail; 32: crown portion; 32a: first straight line portion; 32b: first curved line portion; 32c: second straight line portion; 32d: guide face; 32e: second curved line portion; 41: U-nail; 42: crown portion; 42a: first straight line portion; 42b: first curved line portion; 42c: oblique line portion; 42d: second curved line portion; 42e: second straight line portion; 42f: guide face; 42g: third curved line portion. DETAILED DESCRIPTION

[0007] According to another aspect of the present application, a folded back portion protruding in a direction separating from each other is formed in the pair of leg portions. The crown portion protrudes to a position outside in the width direction than each of the folded back portions. Therefore, by the folded back portions, the pullout load of the U-nail with respect to the driven material can be improved. Further, since the crown portion protrudes to a position outside in the width direction than the folded back portions, the driving passage is easily guided in the width direction. On the other hand, the folded back portions are not easily contacted by the driving passage. Further, the crown portion is suppressed from being shifted in the width direction at a portion close to the top face to be struck. Therefore, the U-nail is easily guided by the driving passage and is not easily shifted in the width direction.

[0008] According to another aspect of the present application, a top face is formed in the center in the width direction of the crown portion. The width of the top face is 1 / 6 to 2 / 3 of the maximum width of the crown portion. Therefore, the center in the width direction of the U-nail is struck. Thereby, uniform force is applied to the pair of leg portions in the width direction. Further, the top face has a certain degree of width. Therefore, the U-nail is easily driven into the driven material without being inclined.

[0009] According to another aspect of the invention, the crown has a curved portion that bulges out from the top surface in the width direction. The diagonal portion extends linearly from the curved portion to the maximum width portion. Therefore, the force on the top surface can be easily transferred to the diagonal portion using the curved portion while avoiding stress concentration. Consequently, the U-shaped nail is less prone to breakage.

[0010] According to another aspect of the invention, the crown has a curved portion that bulges out from the top surface in the width direction. The curved portion extends to the maximum width portion. Therefore, the force on the top surface is easily transmitted to the maximum width portion while avoiding stress concentration via the curved portion. As a result, the U-shaped nail is less prone to breakage.

[0011] According to another aspect of the invention, the crown portion has a planar guide surface that extends outward in the width direction at its widest point. The guide surface extends in the extending direction of the pair of legs. Therefore, the guide surface faces the insertion channel. Consequently, the U-shaped nail is guided by the guide surface with a larger area. This makes it less likely for the U-shaped nail to tilt during insertion.

[0012] According to another aspect of the invention, an adhesive is provided on a pair of legs, which increases the resistance when the U-shaped nail is detached from the driven material. Therefore, the driven U-shaped nail is less likely to detach.

[0013] According to another aspect of the invention, the U-shaped nail is equivalent to or thicker than 15 gauge (gauge: a unit of measurement for the thickness of a U-shaped nail; the smaller the number, the thicker the U-shaped nail). Therefore, for example, the U-shaped nail can be easily used as a fence nail to clamp and hold metal wires, etc.

[0014] Another aspect of the present invention is a connecting U-shaped nail in the state of having multiple U-shaped nails connected together. Therefore, it is possible to easily process the U-shaped nails into a connecting U-shaped nail that is concentrated together.

[0015] According to another aspect of the invention, a driving tool drives in a U-shaped nail. The driving tool has a striking surface that is orthogonal to the driving direction, making contact with the top surface of the U-shaped nail. Therefore, the top surface of the U-shaped nail is struck by the striking surface of the driving tool. The driving tool strikes the U-shaped nail uniformly in the width direction by making surface contact with the plane of the top surface. This suppresses tilting of the U-shaped nail 5 during driving.

[0016] Next, based on Figures 1-6 An embodiment of the present invention will be described. For example... Figure 1 As shown, the driving tool 10 is, for example, a gas spring type driving tool that uses air pressure to drive in the U-shaped nail 5. In the following description, the driving direction of the U-shaped nail 5 is defined as the forward direction, and the direction opposite to the driving direction is defined as the rear direction. The user holds the driving tool 10 by hand, positioned at the rear of the driving tool 10 (in... Figure 1(The middle is the right side of the paper). Define the vertical and horizontal directions based on the user.

[0017] like Figure 1 As shown, the driving tool 10 has a tool body 1. The tool body 1 has a generally cylindrical housing 1a. A cylindrical cylinder 1b extending in the front-rear direction is housed within the housing 1a. Figure 2 As shown, piston 1c is housed in cylinder 1b in a manner that allows it to reciprocate in the front-rear direction. The rear portion of cylinder 1b, located behind piston 1c, communicates with accumulator chamber 1d. Compressed gas, such as air, is sealed in accumulator chamber 1d. The gas pressure in accumulator chamber 1d acts as a thrust to propel piston 1c forward.

[0018] like Figure 1 As shown, a driving head 1e is provided at the front of the cylinder 1b. A driving channel 1f is formed inside the driving head 1e. The rear end of the driving channel 1f communicates with the front of the cylinder 1b. The nail cartridge 11 is engaged with the lower surface of the driving head 1e. Multiple U-shaped nails 5 (connecting U-shaped nails 4) arranged side-by-side in the vertical direction are housed within the nail cartridge 11 (see reference). Figure 3 U-shaped nails 5 are fed one by one from the nail box 11 into the channel 1f in an upward direction.

[0019] like Figure 1 As shown, a contact arm 19 that can slide in the front-to-back direction is provided on the injection head 1e. The contact arm 19 is forced to move forward relative to the injection head 1e (disconnected position). The contact arm 19 is retracted along the injection head 1e by being pressed against the material being injected W (connected position).

[0020] like Figure 1 As shown, a handle 12 for the user to hold is provided at the lower part of the tool body 1. A trigger 13 for the user to pull with their fingertips is provided on the upper front surface of the handle 12. A trigger switch 13a is provided inside the handle 12, which switches from an off state to an on state according to the pulling operation of the trigger 13. When the contact arm 19 is pressed against the material W being driven and moved to the on position, the pulling operation of the trigger 13 is effective.

[0021] like Figure 1 As shown, a battery mounting portion 14 extending in the front-to-back direction is provided on the lower surface of the handle 12. A battery pack 15 can be detachably mounted on the battery mounting portion 14. The battery pack 15 can be detached from the battery mounting portion 14 by sliding in the front-to-back direction. The battery pack 15 can be removed from the battery mounting portion 14 and repeatedly charged using a separately provided charger. The battery pack 15 can be used as a power source for other power tools. The battery pack 15 operates as a power source for supplying power to the motor 2 and other components described later.

[0022] like Figure 1As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2.

[0023] As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2. Figure 1 As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2. Figure 2 As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2.

[0024] As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2. Figure 2 As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2. Figure 2 As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2.

[0025] As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2. Figure 2 As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2.

[0026] Figure 2 As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2. Figure 2 As shown in FIG. 1, a substantially cylindrical drive section housing 16 extending in the up-down direction is provided in front of the handle 12. The upper portion of the drive section housing 16 is integrally connected to the housing la. A connecting section 17 is formed between the drive section housing 16 and the battery mounting section 14. The connecting section 17 houses a controller 18. The controller 18 mainly controls the drive of the motor 2.

[0027] When the user pulls the trigger 13 while the contact arm 19 is in the ON position, such as Figure 2 As shown, wheel 2c rotates in the direction of arrow R. Through the rotation of wheel 2c, rear pin 2e pushes front rack 3d from front to rear. This releases the engagement between rear pin 2e and front rack 3d. As a result, piston 1c advances due to the air pressure in accumulator chamber 1d. With the advance of piston 1c, injector 3 advances within injection channel 1f. Thus, as... Figure 3 As shown, the top 3a of the inserter 3 strikes a U-shaped nail 5. The struck insert is ejected from the ejection port 1h located at the front end of the inserter head 1e (see reference). Figure 1 The U-shaped nail 5, which is fired, is driven into the material W.

[0028] like Figure 2 As shown, the advancing piston 1c collides with the shock absorber 1i. This stops the forward movement of both the piston 1c and the inserter 3. The shock absorber 1i absorbs the impact generated during the collision with the piston 1c, preventing damage to the piston 1c. Even after the piston 1c stops moving forward, the wheel 2c continues to rotate in the direction of arrow R. This causes the engaging part 2d, located at the front end of the rotation direction of the wheel 2c, to engage with the rearmost engaging part 3c from the front. Then, as the wheel 2c continues to rotate, the engaging part 2d pushes the engaged part 3c backward. With the rotation of the wheel 2c, each engaging part 2d pushes each engaged part 3c in turn. Thus, the lifting mechanism 2b pushes the inserter 3 and the piston 1c back to the standby position.

[0029] The detailed structure of U-shaped nail 5 is explained below. For example... Figure 6 As shown, U-shaped nail 5 is a fence nail, used to secure the metal wire Y of a metal fence to the wooden post, which is the material W being driven in. Figure 3 As shown, the U-shaped nail 5 is provided in the form of a connecting U-shaped nail 4, which is formed by connecting multiple U-shaped nails 5 by connecting parts 4a such as tape.

[0030] like Figure 4 , Figure 5 As shown, the U-shaped nail 5 is a roughly U-shaped component formed by bending a metal wire. The cross-section of the U-shaped nail 5 is a roughly quadrilateral with rounded corners. The U-shaped nail 5 is 15 gauge. The U-shaped nail 5 has a pair of legs 6 and a crown 7 connecting each leg 6.

[0031] like Figure 4 , Figure 5As shown, a pair of legs 6 are continuously arranged on the left and right sides of the U-shaped nail 5 from both ends of the crown 7. The pair of legs 6 extend parallel to each other in the front-back direction. Inclined surfaces 6a and 6b are formed at the top of each leg 6, which are inclined relative to the driving direction. The inclined surfaces 6a and 6b are formed in an alternating inclination manner. The left inclined surface 6a faces forward and upward, and the right inclined surface 6b faces forward and downward. Accordingly, when the U-shaped nail 5 is driven into the material W, the left leg 6 is pressed downward, and the right leg 6 is pushed upward. Therefore, the pair of legs 6 extend in an alternating vertical manner. As a result, the driven U-shaped nail 5 is less likely to detach (fall out) from the material W.

[0032] Additionally, adhesive 6c is applied to the tip 6d of each leg 6. This adhesive 6c bonds the tip 6d to the material W being driven in. Accordingly, the U-shaped nail 5 is less likely to detach from the material W being driven in.

[0033] like Figure 4 , Figure 5 As shown, a pair of legs 6 have outwardly projecting folded portions 6e in the left-right direction. Each folded portion 6e is located approximately at the center of each leg 6 in the front-rear direction. Each folded portion 6e has a plane 6f orthogonal to the front-rear direction and a conical surface 6h extending obliquely forward from the protruding end 6g. The plane 6f engages with the driven material W from the front after the U-shaped nail 5 is driven into it. Therefore, the U-shaped nail 5 is less likely to detach from the driven material W. A recess 6i is formed at the rear of each folded portion 6e.

[0034] like Figure 4 , Figure 5 As shown, the crown 7 has a straight portion 7a extending in a straight line along the left-right direction, and curved portions 7c extending in an arc shape from both ends of the straight portion 7a in a manner that bulges outward to the left and right. A rearward-facing top surface 7b is formed on the straight portion 7a. The top surface 7b has a planar shape orthogonal to the front-back direction (driving direction). Each curved portion 7c is connected to the rear end of a pair of legs 6. The outer width W1 of the crown 7 is the width between the outer surfaces 7d of each curved portion 7c that bulge outward to the left and right. The outer width W1 is greater than the width W2 between the protruding ends 6g of each folded-back portion 6e. The outer width W1 constitutes the maximum width of the U-shaped nail 5. That is, each curved portion 7c constitutes the maximum width portion of the U-shaped nail 5.

[0035] like Figure 4 As shown, by inserting U-shaped nails 5 into the insertion channel 1f, each outer surface 7d is guided by the side wall portion 1g of the insertion channel 1f. Each outer surface 7d has a curved shape facing outwards to the left and right. Each outer surface 7d is guided in the front-back direction relative to the side wall portion 1g of the insertion channel 1f. In addition, the curved portion 7c transmits the impact of the driver 3 to the pair of legs 6 while avoiding stress concentration. Therefore, damage to the U-shaped nails 5 caused by impact can be suppressed.

[0036] As shown in Figure 4 , the angle θ at which each curved portion 7c extends from each leg portion 6 to the left and right outer sides is set to be greater than 90 degrees. Therefore, when the staple 5 is driven in, each curved portion 7c can be made to have a small resistance with respect to the driven-in material W. Thus, the staple 5 can be efficiently driven into the driven-in material W.

[0037] As shown in Figure 3 , Figure 4 , the top portion 3a of the advancing driver 3 strikes the top surface 7b from the rear. The top portion 3a of the driver 3 is in a thin plate shape extending in the left and right directions. The striking surface 3b of the top portion 3a is in a quadrangular planar shape orthogonal to the front and rear directions (driving direction). Therefore, the striking surface 3b is in surface contact with the top surface 7b. With this planar contact, the staple 5 is easily struck uniformly over a wide range in a direction orthogonal to the driving direction (left and right and up and down directions). Therefore, the staple 5 can be inhibited from tilting with respect to the driving direction and from being displaced from the target driving position when struck. Thus, the staple 5 can be appropriately driven into the driven-in material W.

[0038] As shown in Figure 4 , the top surface 7b is formed to be located in the center in the left and right directions of the staple 5. Therefore, the driver 3 can strike the center in the left and right directions of the staple 5. Therefore, it is easy to apply force to the pair of leg portions 6 uniformly in the left and right directions, and it is easy to drive the pair of leg portions 6 into the driven-in material W uniformly. In addition, the left and right widths W3 of the top surface 7b are about 1 / 4 of the outer width Wl of the crown portion 7. In this way, the top surface 7b has a certain width, and thus can be appropriately in surface contact with the striking surface 3b of the driver 3.

[0039] In addition, as shown in Figure 6 , it is easy to arrange the wire Y fastened between the staple 5 and the driven-in material W at the center in the left and right directions of the staple 5, and thus the staple 5 is less likely to tilt. Also, by providing the top surface 7b having the left and right widths W3 narrower than the outer width Wl of the staple 5, the space 7e between the driven-in crown portion 7 and the driven-in material W can be made relatively narrow. Thus, by narrowing the movable area of the wire Y with respect to the staple 5, the wire Y can be more appropriately fixed.

[0040] As described above, as shown in Figure 4As shown, the U-shaped nail 5 has a pair of legs 6 extending in generally parallel directions. The base ends of the pair of legs 6 are connected to each other by a crown 7. The width of the crown 7 is wider than the gap between the pair of legs 6. A planar top surface 7b is formed on the crown 7, which faces in the opposite direction to the pair of legs 6. Therefore, when the U-shaped nail 5 is struck on the top surface 7b, it is easily struck by the driver 3 of the driving tool 10 in a planar contact manner. As a result, the U-shaped nail 5 is easily subjected to a uniform impact force in the width direction. In this way, the U-shaped nail 5 is less likely to tilt or shift position when being driven in.

[0041] like Figure 4 As shown, a pair of legs 6 have folded-back portions 6e protruding in a direction separating from each other. The crown portion 7 extends to a position further outward in the width direction than each folded-back portion 6e. Therefore, the folded-back portions 6e increase the pull-out load resistance of the U-shaped nail 5 relative to the material W being driven in. Furthermore, the crown portion 7 extending to a position further outward in the width direction than the folded-back portions 6e facilitates guidance by the driving channel 1f in the width direction. On the other hand, the folded-back portions 6e are less likely to contact the driving channel 1f. This further suppresses the crown portion 7 from shifting in the width direction at a position closer to the top surface 7b being struck. Therefore, the U-shaped nail 5 is easily guided by the driving channel 1f and is less prone to positional shift in the width direction.

[0042] like Figure 4 As shown, the top surface 7b is formed at the center of the crown 7 in the width direction. The width of the top surface 7b is 1 / 6 to 2 / 3 of the maximum width of the crown 7. Therefore, the center of the U-shaped nail 5 in the width direction is struck. As a result, a uniform force is applied to the pair of legs 6 in the width direction. Furthermore, the top surface 7b has a certain width. Therefore, the U-shaped nail 5 can be easily driven into the material W without tilting.

[0043] like Figure 4 As shown, the crown portion 7 has a curved portion 7c that bulges out from the top surface 7b in the width direction. The curved portion 7c extends to the maximum width portion. Therefore, the force on the top surface 7b can be easily transferred to the maximum width portion by utilizing the curved portion 7c, avoiding stress concentration. Accordingly, the U-shaped nail 5 is less prone to breakage.

[0044] like Figure 4 As shown, an adhesive 6c is provided on a pair of legs 6, which increases the resistance when the U-shaped nail 5 is detached from the driven material W. Therefore, the driven U-shaped nail 5 is less likely to detach.

[0045] The thickness of the U-shaped nail 5 is equal to or greater than 15 gauge. Therefore, as... Figure 6 As shown, for example, the U-shaped nail 5 can be easily used as a fence nail to clamp and hold metal wires, etc.

[0046] like Figure 3As shown, this is a connecting type U-shaped nail 4 with multiple U-shaped nails 5 connected together. Therefore, the U-shaped nails 5 can be easily processed into a centralized connecting type U-shaped nail 4.

[0047] like Figure 4 As shown, the driving tool 10 drives in the U-shaped nail 5. The driving tool 10 has a driving surface 3b, which is orthogonal to the driving direction in a manner that contacts the top surface 7b of the U-shaped nail 5. Therefore, the top surface 7b of the U-shaped nail 5 is struck by the driving surface 3b of the driving tool 3. The driving tool 3 strikes the U-shaped nail 5 uniformly in the width direction by making surface contact with the plane of the top surface 7b. In this way, it is possible to suppress the tilting of the U-shaped nail 5 during driving.

[0048] Another embodiment of the present invention will be described below. Furthermore, in the following description, the same reference numerals are used for structures identical to those in the first embodiment, and their descriptions are omitted.

[0049] like Figure 7 , Figure 8 As shown, the U-shaped nail 21 of the second embodiment has a crown 22 connecting a pair of legs 6. The crown 22 has a straight portion 7a and a first curved portion 22a, wherein the first curved portion 22a extends in an arc shape from both ends of the straight portion 7a in a manner that bulges outward to the left and right. At the outer end of each first curved portion 22a, a diagonal portion 22b extending in a straight line diagonally forward is formed. Each diagonal portion 22b extends in a manner that expands outward to the left and right. At the outer end of each diagonal portion 22b, a second curved portion 22c is formed, which extends in an arc shape from the outer end of each diagonal portion 22b in a manner that bulges outward to the left and right. Each second curved portion 22c is connected to the rear end of the pair of legs 6.

[0050] The outer width W4 of the crown portion 22 is the width between the outer surfaces 22d that bulge outwards to the left and right sides of each of the second curved portions 22c. The outer width W4 is greater than the width W2 between each folded-back portion 6e. The outer width W4 constitutes the maximum width of the U-shaped nail 21. That is, each of the second curved portions 22c constitutes the maximum width portion of the U-shaped nail 21.

[0051] By inserting U-shaped nails 21 into the driving channel 1f, each outer surface 22d is driven into the side wall portion 1g of the channel 1f (refer to...). Figure 4 The outer surfaces 22d are curved and face outwards to the left and right. Each outer surface 22d is guided in the front-back direction relative to the sidewall portion 1g of the insertion channel 1f. Furthermore, the left-right width W5 of the top surface 7b is approximately 1 / 6 of the outer width W4 of the crown.

[0052] The first curved portion 22a transmits the blow of the driver 3 to the oblique portion 22b while avoiding concentration of stress. The second curved portion 22c transmits the blow of the driver 3 to the pair of leg portions 6 while avoiding concentration of stress. Thus, breakage of the staple 21 due to the blow can be suppressed.

[0053] By the oblique portion 22b, the space 7e between the driven crown portion 22 and the driven material W can be made narrower. Thus, by making the movable region of the wire Y further narrower, the wire Y can be more appropriately fixed.

[0054] As described above, as shown in Figure 7 , the crown portion 22 has the first curved portion 22a bulging in the width direction from the top surface 7b. The oblique portion 22b extends linearly from the first curved portion 22a. Thus, the force received by the top surface 7b can be easily transmitted to the oblique portion 22b by the first curved portion 22a while avoiding concentration of stress. Accordingly, the staple 21 is less likely to break.

[0055] As shown in Figure 9 , Figure 10 , the staple 31 of the third embodiment has a crown portion 32 connecting the pair of leg portions 6. The crown portion 32 has a first linear portion 32a extending linearly in the left-right direction and first curved portions 32b extending in a circular arc shape from both ends of the first linear portion 32a so as to bulge toward the left and right outer sides. A second linear portion 32c extending linearly in the front direction is formed at the front end of each first curved portion 32b. A second curved portion 32e extending in a circular arc shape toward the left and right inner sides is formed at the front end of the second linear portion 32c. The second curved portion 32e is connected to the rear ends of the pair of leg portions 6.

[0056] A guide surface 32d facing the left and right direction outer sides is formed at each second linear portion 32c. Each guide surface 32d extends in the direction in which the pair of leg portions 6 extends. Each guide surface 32d has a planar shape orthogonal to the left and right direction. An outer width W6 of the crown portion 32 is the width between the guide surfaces 32d. The outer width W6 is larger than the width W2 between the return portions 6e. The outer width W6 constitutes the maximum width of the staple 31. That is, each second linear portion 32c constitutes the maximum width portion of the staple 31.

[0057] By loading the staple 31 into the driving passage 1f, each guide surface 32d is guided by the side wall portion 1g (see Figure 4 ) of the driving passage 1f. Each guide surface 32d is guided along the surface with respect to the side wall portion 1g. Thus, the staple 31 is guided from both left and right sides by the driving passage 1f with a large area. Thus, the inclination of the staple 31 can be further suppressed. In addition, the left and right widths W7 of the top surface 7b are about 1 / 3 of the outer width W6 of the crown portion 32.

[0058] The first curved portion 32b transmits the impact of the driver 3 to the second straight portion 32c while avoiding concentration of stress. The second curved portion 32e transmits the impact of the driver 3 to the pair of leg portions 6 while avoiding concentration of stress. Thus, breakage of the staple 31 due to the impact can be suppressed.

[0059] As described above, as shown in Figure 9 The crown portion 32 has a planar guide surface 32d toward the width direction outer side at the maximum width portion. The guide surface 32d extends toward the extension direction of the pair of leg portions 6. Thus, the guide surface 32d faces the insertion passage If. Thus, the staple 31 is guided by the guide surface 32d with a large area. In this way, the staple 31 is less likely to be inclined when being inserted.

[0060] As shown in Figure 11 , Figure 12 The staple 41 of the fourth embodiment has a crown portion 42 connecting the pair of leg portions 6. The crown portion 42 has a first straight portion 42a extending linearly in the left-right direction, and first curved portions 42b extending in an arc shape from both ends of the first straight portion 42a in a manner bulging toward the left-right outer sides. In the outer ends of each of the first curved portions 42b, an oblique line portion 42c extending linearly toward the oblique front is formed. Each of the oblique line portions 42c extends in a manner expanding toward the left-right outer sides. In the outer end of each of the oblique line portions 42c, a second curved portion 42d extending in an arc shape from the outer end of each of the oblique line portions 42c in a manner bulging toward the left-right outer sides is formed. In the front end of each of the second curved portions 42d, a second straight portion 42e extending linearly toward the front is formed. In the front end of the second straight portion 42e, a third curved portion 42g extending in an arc shape toward the left-right inner sides from the front end of the second straight portion 42e is formed. The third curved portion 42g is connected to the rear ends of the pair of leg portions 6.

[0061] In each of the second straight portions 42e, a guide surface 42f facing the left-right direction outer side is formed. Each of the guide surfaces 42f extends in the extension direction of the pair of leg portions 6. Each of the guide surfaces 42f has a planar shape orthogonal to the left-right direction. An outer width W8 of the crown portion 42 is the width between the guide surfaces 42f. The outer width W8 is larger than the width W2 between the return portions 6e. The outer width W8 constitutes the maximum width of the staple 41. That is, each of the second straight portions 42e constitutes the maximum width portion of the staple 41.

[0062] By packing the staple 41 into the insertion passage If, each of the guide surfaces 42f is guided by the side wall portion Ig (refer to FIG. 1) of the insertion passage If. Thus, the staple 41 is guided by the guide surfaces 42f with a large area. In this way, the staple 41 is less likely to be inclined when being inserted. Figure 4)guidance. Each guide surface 42f is guided along the surface with respect to the side wall portion 1g. Thus, the staple 41 is guided from both left and right sides with a large area into the passage 1f. Thereby, the inclination of the staple 41 can be further suppressed. In addition, the left and right widths W9 of the top surface 7b are about 1 / 3 of the outer width W8 of the crown portion.

[0063] The first curved portion 42b transmits the blow of the driver 3 to the oblique portion 42c while avoiding concentration of stress. The second curved portion 42d transmits the blow of the driver 3 to the second straight portion 42e while avoiding concentration of stress. The third curved portion 42g transmits the blow of the driver 3 to the pair of leg portions 6 while avoiding concentration of stress. Thus, the breakage of the staple 41 caused by the blow can be suppressed.

[0064] Through the oblique portion 42c, the space 7e between the driven crown portion 42 and the driven material W can be made narrower. Thereby, by making the movable region of the wire Y further narrow, the wire Y can be more appropriately fixed.

[0065] Various modifications can be made to each of the above-described embodiments. For example, the driving tool is exemplified by the gas spring type driving tool. Instead of this, for example, the present application can be applied to a driving tool called a mechanical spring type, which moves the driver in the direction opposite to the driving direction by a lifting mechanism, and moves the driver in the driving direction by raising the elastic force of a compression spring or the like of a machine.

[0066] The cross-sectional shape of the staple can be a triangle or a polygon of five sides or more, or can be a circle. The staple can be thicker than 15 gauge. The connecting type staple can be a structure connected by an adhesive. The staple can not have a folded-back portion.

[0067] The driver can have an extension portion extending to the front of the striking surface. The extension portion can function as a support portion that suppresses the deviation of the driver in the left and right directions, for example.

Claims

1. A U-shaped nail, characterized in that, It has a pair of legs, a crown, and a top surface, among which, The pair of legs extend generally in parallel; The crown connects the base ends of the pair of legs to each other, and the width of the crown is wider than the gap between the pair of legs; The top surface is planar, formed on the crown and oriented in the opposite direction to the pair of legs.

2. The U-shaped nail according to claim 1, characterized in that, A folded portion is formed on each of the legs, protruding in a direction that separates them from each other. The crown extends to a position that is wider than each of the folded-back portions.

3. The U-shaped nail according to claim 1 or 2, characterized in that, The top surface is formed at the center of the width direction of the crown. The width of the top surface is 1 / 6 to 2 / 3 of the maximum width of the crown.

4. The U-shaped nail according to claim 3, characterized in that, The crown portion has a curved portion and a sloping portion, wherein... The curved portion bulges out from the top surface in the width direction; The oblique line extends in a straight line from the curved section to near the maximum width section.

5. The U-shaped nail according to claim 3, characterized in that, The crown has a curved portion that bulges outward from the top surface in the width direction and extends to or near the maximum width portion.

6. The U-shaped nail according to claim 4 or 5, characterized in that, The crown has a planar guide surface that extends outward in the width direction at its maximum width portion and in the extending direction of the pair of legs.

7. The U-shaped nail according to any one of claims 1 to 6, characterized in that, An adhesive is provided on one or both legs to increase resistance when the U-shaped nail detaches from the material being driven in.

8. The U-shaped nail according to any one of claims 1 to 7, characterized in that, The U-shaped nail is 15 gauge thick or thicker than 15 gauge.

9. A connecting U-shaped nail, characterized in that, The connecting U-shaped nail is connected to a plurality of U-shaped nails as described in any one of claims 1 to 8.

10. A driving tool for driving in the U-shaped nail according to any one of claims 1 to 8, characterized in that, It has an inserter with a striking surface that is orthogonal to the inserting direction in a manner that contacts the top surface of the U-shaped nail.

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