Staples and Driving Tools

Abstract

To provide staples that are less prone to tilting or misalignment when driven into the ground. [Solution] The staple 5 has a pair of legs 6 that extend substantially parallel to each other. The base ends of the pair of legs 6 are connected by a crown 7. The crown 7 is wider than the distance between the pair of legs 6. The crown 7 has a flat top surface 7b that faces away from the pair of legs 6.

Description

Technical Field

[0001] The present disclosure relates to staples and a driving tool for driving the staples into a driving material.

Background Art

[0002] Staples are, for example, U-shaped and are used to attach an attachment member to an attachment target member. As one type of staple, for example, a fencing staple for attaching a fence made of a metal wire to a wooden post is known. The staple is driven by a driver of a driving tool. The staples of Patent Documents 1, 2, and 3 have an arched crown and a pair of legs extending parallel from both ends of the crown. The striking surface of the driver is a concave curved surface corresponding to the shape of the crown of the staple. However, when the striking force received by the staple from the driver becomes non-uniform in the width direction due to variations in the shape of the crown of the staple or the like, there is a risk that the staple may tilt or be driven in a state of being displaced in the width direction with respect to the driving direction. As a result, poor driving of the staple may occur.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, there has been a need for a staple that is less likely to tilt or be displaced when being driven.

Means for Solving the Problems

[0005] According to one aspect of this disclosure, a staple has a pair of legs extending substantially parallel to each other. The base ends of the pair of legs are connected by a crown. The crown is wider than the distance between the pair of legs. The crown has a planar top surface facing away from the pair of legs. Therefore, the staple is more likely to be struck flat against the driver of the staple driving tool by being struck on the top surface. As a result, the staple is more likely to receive a uniform impact force in the width direction. Thus, the staple is less likely to tilt or shift when driven in. [Brief explanation of the drawing]

[0006] [Figure 1] This is a left side view of the driving tool with the left housing removed, according to the first embodiment of this disclosure. [Figure 2] This is a cross-sectional view taken along line II-II in Figure 1. [Figure 3] This is a perspective view showing the driver and stapler. [Figure 4] This is a view of the bottom of a staple loaded into a staple driving channel. [Figure 5] This is a perspective view of staples. [Figure 6] This is a schematic diagram showing the state of staples being driven into the material to be stapled. [Figure 7] This is a bottom view of the staple according to the second embodiment. [Figure 8] Figure 7 is a perspective view of the staples. [Figure 9] This is a bottom view of the staple according to the third embodiment. [Figure 10] Figure 9 is a perspective view of the staples. [Figure 11] This is a bottom view of the staple according to the fourth embodiment. [Figure 12] Figure 11 is a perspective view of the staples. [Modes for carrying out the invention]

[0007] According to other aspects of this disclosure, a pair of legs are formed with barbs that project away from each other. The crowns extend outward in the width direction from each of the barbs. Therefore, the barbs increase the pull-out load of the staple on the material being driven. Also, because the crowns extend outward in the width direction from the barbs, they are more easily guided in the width direction by the driving passage. On the other hand, the barbs are less likely to come into contact with the driving passage. Furthermore, the crowns are less likely to shift in the width direction at locations relatively close to the top surface being struck. Therefore, the staples are more easily guided by the driving passage and less likely to shift in the width direction.

[0008] According to other aspects of this disclosure, the top surface is formed in the widthwise center of the crown. The width of the top surface is 1 / 6 to 2 / 3 of the maximum width of the crown. Therefore, the widthwise center of the staple is struck. This applies uniform force in the widthwise direction to the pair of legs. Moreover, the top surface has a certain width and length. Therefore, the staple is easily driven into the material to be driven without tilting.

[0009] According to other aspects of this disclosure, the crown has a curved section that bulges in the width direction from the top surface. A shaded section extends linearly from the curved section to the widest part. Therefore, the force acting on the top surface is easily transmitted to the shaded section while avoiding stress concentration by utilizing the curved section. This makes the staples less likely to break.

[0010] According to other aspects of this disclosure, the crown has a curved portion that bulges in the width direction from the top surface. The curved portion extends to the widest part. Therefore, the force acting on the top surface is easily transmitted to the widest part while avoiding stress concentration by utilizing the curved portion. This makes the staples less likely to break.

[0011] According to other aspects of this disclosure, the crown has a planar guide surface that faces outward in the width direction at its widest point. The guide surface extends in the direction of extension of the pair of legs. Thus the guide surface faces the driving path. As a result, the staple is guided over a wide area by the guide surface. Thus the staple is less likely to tilt when driven in.

[0012] According to another aspect of the present disclosure, an adhesive is provided that increases the resistance when the pair of legs come out of the driven-in material. Therefore, the driven-in staple is more difficult to come out.

[0013] According to another aspect of the present disclosure, the staple is equivalent to or thicker than 15 gauge. Therefore, for example, it is easy to use as a fencing staple that holds the staple by sandwiching a metal wire or the like.

[0014] Another aspect of the present disclosure is a connecting staple in a state where a plurality of staples are connected. Therefore, the staples can be easily handled as a single connecting staple.

[0015] According to another aspect of the present disclosure, a driving tool drives the staple. The driver of the driving tool has a striking surface orthogonal to the driving direction so as to abut against the top surface of the staple. Therefore, the top surface of the staple is struck by the striking surface of the driver. The driver strikes the staple uniformly in the width direction by the surface contact between the flat surfaces. Thus, the staple is suppressed from tilting when being driven in.

[0016] Next, one embodiment of the present disclosure will be described based on FIGS. 1 to 6. As shown in FIG. 1, the driving tool 10 is a gas spring type that drives the staple 5 using, for example, gas pressure. In the following description, the driving direction of the staple 5 is defined as the forward direction, and the reverse driving direction is defined as the backward direction. The user holds the driving tool 10 by hand and is located behind the driving tool 10 (the right side of the paper surface in FIG. 1). The vertical direction and the horizontal direction are defined based on the user.

[0017] As shown in Figure 1, the driving tool 10 has a tool body 1. The tool body 1 has a generally cylindrical housing 1a. A cylindrical cylinder 1b extending front to back is housed in the housing 1a. As shown in Figure 2, a piston 1c is housed in the cylinder 1b so as to be able to reciprocate back to back. The rear part of the cylinder 1b behind the piston 1c is connected to a pressure accumulator 1d. Compressed gas, such as air, is sealed in the pressure accumulator 1d. The gas pressure in the pressure accumulator 1d acts as a thrust to advance the piston 1c.

[0018] As shown in Figure 1, a driving nose portion 1e is provided at the front of the cylinder 1b. A driving passage 1f is formed inside the driving nose portion 1e. The rear end of the driving passage 1f communicates with the front of the cylinder 1b. A magazine 11 is attached to the lower side of the driving nose portion 1e. Multiple staples 5 (connecting staples 4) arranged in parallel in the vertical direction are housed inside the magazine 11 (see Figure 3). The staples 5 are supplied one by one upward from inside the magazine 11 toward the driving passage 1f.

[0019] As shown in Figure 1, the driving nose portion 1e is provided with a contact arm 19 that can slide back and forth. The contact arm 19 is biased to move forward relative to the driving nose portion 1e (off position). The contact arm 19 moves backward along the driving nose portion 1e when pressed against the material to be driven W (on position).

[0020] As shown in Figure 1, the lower part of the tool body 1 is provided with a grip 12 for the user to hold. The upper front of the grip 12 is provided with a trigger 13 that the user operates by pulling it with their fingertips. Inside the grip 12 is a trigger switch 13a that switches from an off state to an on state in response to the pulling operation of the trigger 13. The pulling operation of the trigger 13 becomes effective when the contact arm 19 is pressed against the material to be driven W and moves to the on position.

[0021] As shown in Figure 1, a battery mounting section 14 extending in the front-to-back direction is provided on the lower surface of the grip 12. A battery pack 15 can be detachably attached to the battery mounting section 14. The battery pack 15 can be attached to and detached from the battery mounting section 14 by sliding along the front-to-back direction. The battery pack 15 can be removed from the battery mounting section 14 and repeatedly recharged with a separately prepared charger for reuse. The battery pack 15 can be used as a power source for other power tools. The battery pack 15 operates as a power source that supplies power to the motor 2, etc., which will be described later.

[0022] As shown in Figure 1, a roughly cylindrical drive unit case 16 extending vertically is provided in front of the grip 12. The upper part of the drive unit case 16 is integrally connected to the housing 1a. A connection part 17 is formed between the drive unit case 16 and the battery mounting part 14. A controller 18 is housed in the connection part 17. The controller 18 mainly controls the drive of the motor 2.

[0023] As shown in Figure 1, a motor 2, which serves as the drive source, is housed inside the drive unit case 16. The motor 2 is housed in a position with its axis extending in the vertical direction. The motor 2 is started by pulling the trigger 13, using power from the battery pack 15. A reduction gear train 2a is provided above the motor 2. A lift mechanism 2b (see Figure 2) is provided above the reduction gear train 2a. The motor 2, reduction gear train 2a, and lift mechanism 2b are arranged coaxially. The rotational output of the motor 2 is reduced by the reduction gear train 2a and output to the lift mechanism 2b.

[0024] As shown in Figure 2, the lift mechanism 2b is provided on the right side of the driving nose portion 1e. The lift mechanism 2b has a rotatable wheel 2c. The wheel 2c rotates in the direction of arrow R (counterclockwise in Figure 2). The wheel 2c is restricted from rotating in the direction opposite to arrow R. Six engaging portions 2d are provided along the outer edge of the wheel 2c. The engaging portions 2d are cylindrical shaft members (pins) that extend in the vertical direction.

[0025] As shown in Figure 2, a driver 3, which is long in the front-to-back direction, is coupled to the front of the piston 1c. The tip 3a of the driver 3 enters the driving passage 1f. The driver 3 has six engaging parts 3c. Each engaging part 3c protrudes to the right from the right side of the driver 3. Each engaging part 3c is formed in a rack-tooth shape. Each engaging part 3c is provided at a constant interval in the longitudinal direction (front-to-back direction) of the driver 3. Each engaging part 2d of the lift mechanism 2b is sequentially engaged with each engaging part 3c.

[0026] Figure 2 shows the driver 3 set in the standby position before performing the driving operation. As shown in Figure 2, one engaged part 3c engages with one engaging part 2d. Specifically, the front rack 3d, which is the furthest forward of the engaged parts 3c, engages with the rear pin 2e, which is located at the rear end in the rotational direction of the wheel 2c, among the engaging parts 2d. The rear pin 2e engages with the front rack 3d from the front. Due to the engagement of the rear pin 2e and the restriction of rotation of the wheel 2c in the reverse R direction, the lift mechanism 2b supports the driver 3 from the front. As a result, the driver 3 and piston 1c are held in the standby position against the gas pressure of the accumulator chamber 1d.

[0027] When the user pulls the trigger 13 with the contact arm 19 in the ON position, the wheel 2c rotates in the direction of arrow R, as shown in Figure 2. The rotation of the wheel 2c causes the rear end pin 2e to move over the front end rack 3d. This disengages the rear end pin 2e and the front end rack 3d. As a result, the piston 1c moves forward due to the gas pressure in the accumulator chamber 1d. As the piston 1c moves forward, the driver 3 moves forward within the driving passage 1f. This causes the tip 3a of the driver 3 to strike one staple 5, as shown in Figure 3. The struck stapler is ejected from the ejection port 1h located at the front end of the driving nose portion 1e (see Figure 1). The ejected staple 5 is driven into the material W to be stapled.

[0028] As shown in Figure 2, the forward-moving piston 1c collides with the damper 1i. This stops the forward movement of the piston 1c and the driver 3. The damper 1i absorbs the impact of the collision with the piston 1c. Damage to the piston 1c is prevented by the damper 1i. Even after the forward movement of the piston 1c stops, the wheel 2c continues to rotate in the direction of arrow R. As a result, the engaging part 2d located at the front of the wheel 2c's rotation engages with the rearmost engaged part 3c from the front. As the wheel 2c continues to rotate further, the engaging part 2d pushes the engaged part 3c backward. As the wheel 2c rotates, each engaging part 2d pushes each engaged part 3c in sequence. In this way, the lift mechanism 2b pushes the driver 3 and piston 1c back to the standby position.

[0029] The detailed structure of staple 5 will be described below. As shown in Figure 6, staple 5 is a fencing staple used to fasten the wire Y of a metal fence to a wooden post, which is the material to be driven into W. As shown in Figure 3, staple 5 is provided in the form of a connecting staple 4 in which multiple staples 5 are connected by a connecting part 4a such as tape.

[0030] As shown in Figures 4 and 5, the staple 5 is a roughly U-shaped member formed by bending a metal wire. The cross-section of the staple 5 is roughly square with rounded corners. The staple 5 has a thickness of 15 gauge. The staple 5 has a pair of legs 6 and a crown 7 that connects each leg 6.

[0031] As shown in Figures 4 and 5, a pair of legs 6 are provided on both the left and right sides of the staple 5, continuous with the ends of the crown 7. The pair of legs 6 extend in the front-rear direction parallel to each other. Inclined surfaces 6a and 6b are formed at the tip of each leg 6, inclined with respect to the driving direction. The inclined surfaces 6a and 6b are formed to be inclined alternately. The left inclined surface 6a faces forward and upward, and the right inclined surface 6b faces forward and downward. As a result, when the staple 5 is driven into the material W, the left leg 6 is pushed downward and the right leg 6 is pushed upward. Therefore, the pair of legs 6 extend alternately up and down. This makes it difficult for the driven staple 5 to come loose from the material W.

[0032] Furthermore, adhesive 6c is applied to the tip 6d of each leg 6. This adhesive 6c adheres the tip 6d to the material W to be driven into. This makes it more difficult for the staple 5 to come loose from the material W to be driven into.

[0033] As shown in Figures 4 and 5, each pair of legs 6 has a return 6e that protrudes outward in the left-right direction. Each return 6e is located approximately in the center of each leg 6 in the front-rear direction. Each return 6e has a plane 6f perpendicular to the front-rear direction and a tapered surface 6h extending diagonally forward from the protruding end 6g. The plane 6f engages with the material W after the staple 5 has been driven into the material W from the front. This makes it more difficult for the staple 5 to come out of the material W. A recess 6i is formed behind each return 6e.

[0034] As shown in Figures 4 and 5, the crown 7 has a straight section 7a that extends linearly in the left-right direction and curved sections 7c that extend in an arc shape, bulging outwards to the left and right from both ends of the straight section 7a. The straight section 7a has a top surface 7b that faces backward. The top surface 7b has a planar shape perpendicular to the front-rear direction (driving direction). Each curved section 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 that bulge outwards to the left and right of each curved section 7c. The outer width W1 is greater than the width W2 between the protruding ends 6g of each return 6e. The outer width W1 constitutes the maximum width of the staple 5. That is, each curved section 7c constitutes the maximum width of the staple 5.

[0035] As shown in Figure 4, when the staple 5 is loaded into the driving passage 1f, each outer surface 7d is guided to the side wall portion 1g of the driving passage 1f. Each outer surface 7d has a curved shape with its surfaces facing outwards to the left and right. Each outer surface 7d makes linear contact with the side wall portion 1g of the driving passage 1f in the vertical direction. 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 staple 5 due to impact can be suppressed.

[0036] As shown in Figure 4, the angle θ extending outward from each leg 6 of each curved section 7c is set to be greater than 90 degrees. Therefore, when driving in the staples 5, the resistance of each curved section 7c to the material W to be driven in can be made relatively small. This allows the staples 5 to be driven into the material W efficiently.

[0037] As shown in Figures 3 and 4, the top surface 7b is struck from behind by the front end 3a of the advancing driver 3. The front end 3a of the driver 3 is a thin plate shape extending to the left and right. The striking surface 3b of the front end 3a has a rectangular shape perpendicular to the front-to-back direction (driving direction). Therefore, the striking surface 3b makes surface contact with the top surface 7b. This surface contact makes it easier for the staple 5 to be struck uniformly over a wide range in directions perpendicular to the driving direction (left-to-right and up-and-down directions). Therefore, tilting of the staple 5 with respect to the driving direction and positional deviation from the target driving position during striking can be suppressed. As a result, the staple 5 can be properly driven into the material W to be driven.

[0038] As shown in Figure 4, the top surface 7b is formed to be located in the center of the staple 5 in the left-right direction. Therefore, the driver 3 can strike the center of the staple 5 in the left-right direction. This makes it easier to apply uniform force to the pair of legs 6 in the left-right direction, and to drive the pair of legs 6 evenly into the material W to be driven. Also, the left-right width W3 of the top surface 7b is approximately 1 / 4 of the outer width W1 of the crown 7. By having the top surface 7b have a certain width in this way, it can make proper surface contact with the striking surface 3b of the driver 3.

[0039] Furthermore, as shown in Figure 6, the wire Y fastened between the staple 5 and the material to be driven in W can be easily positioned at the center of the staple 5 in the left-right direction, and tilting of the staple 5 is less likely to occur. Moreover, by making the left-right width W3 of the top surface 7b smaller than the outer width W1, the space 7e between the driven crown 7 and the material to be driven in W can be made relatively narrow. This narrows the range of motion of the wire Y relative to the staple 5, allowing the wire Y to be fixed more appropriately.

[0040] As described above, as shown in Figure 4, the staple 5 has a pair of legs 6 extending substantially parallel to each other. The base ends of the pair of legs 6 are connected by a crown 7. The crown 7 is wider than the distance between the pair of legs 6. The crown 7 has a flat top surface 7b that faces away from the pair of legs 6. Therefore, the staple 5 is easily struck on its top surface 7b, and is struck flat against the driver 3 of the driving tool 10. As a result, the staple 5 is easily subjected to a uniform impact force in the width direction. Thus, the staple 5 is less likely to tilt or shift position when driven in.

[0041] As shown in Figure 4, each pair of legs 6 has a return 6e that protrudes away from each other. The crown 7 extends outward in the width direction from each of the returns 6e. Therefore, the returns 6e increase the pull-out load of the staple 5 on the material W to be driven. Also, because the crown 7 extends outward in the width direction from the returns 6e, it is easily guided in the width direction by the driving passage 1f. On the other hand, the returns 6e are less likely to come into contact with the driving passage 1f. Furthermore, the crown 7 is less likely to shift in the width direction at a point relatively close to the top surface 7b that is struck. Therefore, the staple 5 is easily guided by the driving passage 1f and is less likely to shift in position in the width direction.

[0042] As shown in Figure 4, the top surface 7b is formed in the center of the width direction of the crown 7. 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 staple 5 in the width direction is struck. As a result, force is applied uniformly in the width direction to the pair of legs 6. Moreover, the top surface 7b has a certain width and length. Therefore, the staple 5 is easily driven into the material W without tilting.

[0043] As shown in Figure 4, the crown 7 has a curved section 7c that bulges in the width direction from the top surface 7b. The curved section 7c extends to the widest part. Therefore, the force acting on the top surface 7b is easily transmitted to the widest part while avoiding stress concentration by utilizing the curved section 7c. This makes it difficult for the staples 5 to break.

[0044] As shown in Figure 4, a pair of legs 6 are provided with adhesive 6c to increase resistance when they are pulled out of the material W being driven into. Therefore, the driven staples 5 are less likely to come out.

[0045] As shown in Figure 6, staple 5 is equivalent to or thicker than 15 gauge staples. Therefore, staple 5 can be easily used as a fencing staple to hold metal wires or the like.

[0046] As shown in Figure 3, this is a connected staple 4 in which multiple staples 5 are linked together. Therefore, the staples 5 can be easily handled as a single connected staple 4.

[0047] As shown in Figure 4, the driving tool 10 drives in the staple 5. The driver 3 of the driving tool 10 has a striking surface 3b perpendicular to the driving direction so as to make surface contact with the top surface 7b of the staple 5. Therefore, the top surface 7b of the staple 5 is struck by the striking surface 3b of the driver 3. The driver 3 strikes the staple 5 uniformly in the width direction due to surface contact between the two planes. Thus, tilting of the staple 5 during driving is suppressed.

[0048] Other embodiments of the present disclosure will be described below. In the following description, components identical to those in the first embodiment will be denoted by the same reference numerals and their descriptions will be omitted.

[0049] As shown in Figures 7 and 8, the staple 21 of the second embodiment has a crown 22 that connects a pair of legs 6. The crown 22 has a straight section 7a and first curved sections 22a that extend in an arc shape from both ends of the straight section 7a so as to bulge outwards to the left and right. At the outer end of each first curved section 22a, a diagonal line section 22b is formed that extends in a straight line diagonally forward. Each diagonal line section 22b extends so as to bulge outwards to the left and right. From the outer end of each diagonal line section 22b, a second curved section 22c is formed that extends in an arc shape so as to bulge outwards to the left and right. Each second curved section 22c is connected to the rear end of the pair of legs 6.

[0050] The outer width W4 of the crown 22 is the width between the outer surfaces 22d that bulge outwards to the left and right of each second curved section 22c. The outer width W4 is greater than the width W2 between each return 6e. The outer width W4 constitutes the maximum width of the staple 21. That is, each second curved section 22c constitutes the maximum width portion of the staple 21.

[0051] When the staples 21 are loaded into the driving passage 1f, each outer surface 22d is guided to the side wall portion 1g (see Figure 4) of the driving passage 1f. Each outer surface 22d has a curved shape with its surfaces facing outwards to the left and right. Each outer surface 22d makes vertical contact with the side wall portion 1g of the driving passage 1f. Also, 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 section 22a transmits the impact of the driver 3 to the shaded section 22b while avoiding stress concentration. The second curved section 22c transmits the impact of the driver 3 to the pair of legs 6 while avoiding stress concentration. This suppresses damage to the staples 21 due to impact.

[0053] The shaded portion 22b allows the space 7e between the embedded crown 22 and the embedded material W to be narrowed. This narrows the range of motion of the wire Y, thereby allowing the wire Y to be fixed more effectively.

[0054] As described above, as shown in Figure 7, the crown 22 has a first curved section 22a that bulges in the width direction from the top surface 7b. A shaded section 22b extends linearly from the first curved section 22a to the widest part. Therefore, the force received by the top surface 7b is easily transmitted to the shaded section 22b while avoiding stress concentration by utilizing the first curved section 22a. This makes it difficult for the staples 21 to break.

[0055] As shown in Figures 9 and 10, the staple 31 of the third embodiment has a crown 32 that connects a pair of legs 6. The crown 32 has a first straight section 32a that extends linearly in the left-right direction, and a first curved section 32b that extends in an arc shape from both ends of the first straight section 32a so as to bulge outwards to the left and right. A second straight section 32c that extends linearly forward is formed at the front end of each first curved section 32b. A second curved section 32e that extends inwards to the left and right in an arc shape is formed from the front end of the second straight section 32c. The second curved section 32e is connected to the rear ends of the pair of legs 6.

[0056] Each second straight section 32c has a guide surface 32d facing outward in the left-right direction. Each guide surface 32d extends along the extension direction of the pair of legs 6. Each guide surface 32d has a planar shape perpendicular to the left-right direction. The outer width W6 of the crown 32 is the width between each guide surface 32d. The outer width W6 is greater than the width W2 between each return 6e. The outer width W6 constitutes the maximum width of the staple 31. That is, each second straight section 32c constitutes the maximum width portion of the staple 31.

[0057] When the staples 31 are loaded into the driving passage 1f, each guide surface 32d is guided to the side wall portion 1g (see Figure 4) of the driving passage 1f. Each guide surface 32d is guided in a surface contact manner with the side wall portion 1g. As a result, the staples 31 are guided into the driving passage 1f from both the left and right sides over a wide area. This further suppresses the tilting of the staples 31. Also, the left-right width W7 of the top surface 7b is approximately 1 / 3 of the outer width W6 of the crown.

[0058] The first curved section 32b transmits the impact of the driver 3 to the second straight section 32c while avoiding stress concentration. The second curved section 32e transmits the impact of the driver 3 to the pair of legs 6 while avoiding stress concentration. This suppresses damage to the staples 31 due to impact.

[0059] As described above, as shown in Figure 9, the crown 32 has a planar guide surface 32d that faces outward in the width direction at its widest point. The guide surface 32d extends in the direction of extension of the pair of legs 6. Therefore, the guide surface 32d faces the driving passage 1f. As a result, the staple 31 is guided over a wide area by the guide surface 32d. Thus, the staple 31 is less likely to tilt when driven in.

[0060] As shown in Figures 11 and 12, the staple 41 of the fourth embodiment has a crown 42 that connects a pair of legs 6. The crown 42 has a first straight section 42a that extends linearly in the left-right direction, and a first curved section 42b that extends in an arc shape from both ends of the first straight section 42a so as to bulge outwards to the left and right. At the outer end of each first curved section 42b, a diagonal line section 42c is formed that extends linearly diagonally forward. Each diagonal line section 42c extends so as to bulge outwards to the left and right. From the outer end of each diagonal line section 42c, a second curved section 42d is formed that extends in an arc shape so as to bulge outwards to the left and right. At the front end of each first curved section 42b, a second straight section 42e is formed that extends linearly forward. From the front end of the second straight section 42e, a third curved section 42g is formed that extends inwards to the left and right in an arc shape. The third curved section 42g is connected to the rear ends of the pair of legs 6.

[0061] Each second straight section 42e has a guide surface 42f facing outward in the left-right direction. Each guide surface 42f extends along the extension direction of the pair of legs 6. Each guide surface 42f has a planar shape perpendicular to the left-right direction. The outer width W8 of the crown 42 is the width between each guide surface 42f. The outer width W8 is greater than the width W2 between each return 6e. The outer width W8 constitutes the maximum width of the staple 41. That is, each second straight section 42e constitutes the maximum width portion of the staple 41.

[0062] When the staples 41 are loaded into the driving passage 1f, each guide surface 42f is guided to the side wall portion 1g (see Figure 4) of the driving passage 1f. Each guide surface 42f is guided in a surface contact manner with the side wall portion 1g. As a result, the staples 41 are guided into the driving passage 1f from both the left and right sides over a wide area. This further suppresses the tilting of the staples 41. Also, the left-right width W9 of the top surface 7b is approximately 1 / 3 of the outer width W8 of the crown.

[0063] The first curved section 42b transmits the impact of the driver 3 to the shaded section 42c while avoiding stress concentration. The second curved section 42d transmits the impact of the driver 3 to the second straight section 42e while avoiding stress concentration. The third curved section 42g transmits the impact of the driver 3 to the pair of legs 6 while avoiding stress concentration. As a result, damage to the staples 41 due to impact can be suppressed.

[0064] The shaded portion 42c allows the space 7e between the embedded crown 42 and the embedded material W to be narrowed. This narrows the range of motion of the wire Y, thereby allowing the wire Y to be fixed more effectively.

[0065] Various modifications can be made to each of the embodiments described above. For example, the driving tool was exemplified as a gas spring type. Alternatively, the present disclosure may be applied to a driving tool referred to as a mechanical spring type, in which, for example, the driver is moved in the opposite direction to the driving direction by a lift mechanism, and the driver is moved in the driving direction by increasing the spring force of a mechanical compression spring or the like.

[0066] The cross-sectional shape of the staple may be triangular, a polygon with pentagons or more, or circular. The staple may be thicker than 15 gauge. Connecting staples may be connected with adhesive. The staple may not have a barb.

[0067] The driver may have an extension that extends forward from the striking surface. The extension can be used, for example, as a support to suppress lateral displacement of the driver. [Explanation of Symbols]

[0068] 10. Driving tools 11 Magazine 12 Grips 13 Trigger 13a Trigger switch 14 Battery mounting section 15 Battery Packs 16 Drive unit case 17 Connection part 18 controllers 19 Contact Arm 1 Tool body 1a Housing 1b Cylinder 1c Piston 1d Accumulator 1e Nose section for driving 1st floor driving passage 1g side wall 1h injection port 1i damper 2 motors 2a Reduction gear train 2b Lift mechanism 2c wheels 2d engaging part 2e Rear end pin 3 Drivers 3a Tip 3b Hitting surface 3c Engaged part 3D front rack 4-link staples 4a Connecting part 5 staples 6 legs 6a Left side slope 6b Right side slope 6c adhesive 6d tip 6e return 6f plane 6g protruding end 6h tapered surface 6i recess 7 Crown 7a Straight section 7b Top surface 7c Curve section 7d External surface 7e space W - material to be driven in Y-wire 21 staples 22 Crown 22a 1st curve section 22b Shaded area 22c 2nd curve section 22d External surface 31 staples 32 Crown 32a 1st straight section 32b 1st curve section 32c 2nd straight section 32d Guide surface 32e 2nd curve section 41 staples 42 Crown 42a 1st straight section 42b 1st curve section 42c Shaded area 42d 2nd curve section 42e 2nd straight section 42f Guide surface 42g 3rd curve part

Claims

1. It is a staple, A pair of legs extending almost parallel to each other, A crown that connects the base ends of the pair of legs and is wider than the distance between the pair of legs, A staple having a flat top surface formed on the crown and facing away from the pair of legs.

2. A staple according to claim 1, The pair of legs are formed with barbs that protrude in directions away from each other. The crown is a staple that protrudes outward in the width direction from each of the aforementioned returns.

3. A staple according to claim 1 or 2, The top surface is formed in the center of the width direction of the crown, A staple whose top surface width is 1 / 6 to 2 / 3 of the maximum width of the crown.

4. A staple according to claim 3, The crown of the staple has a curved portion that bulges in the width direction from the top surface and a diagonal portion that extends linearly from the curved portion to the widest part.

5. A staple according to claim 3, The crown is a staple having a curved portion that bulges outward in the width direction from the top surface and extends to the widest part.

6. A staple according to claim 4 or 5, The crown of the staple has a planar guide surface that faces outward in the width direction at its widest point and extends in the direction of extension of the pair of legs.

7. A staple according to any one of claims 1 to 6, A staple having an adhesive applied to the pair of legs to increase resistance when it comes out of the material to be driven in.

8. A staple according to any one of claims 1 to 7, Staples equivalent to or thicker than 15 gauge.

9. A connecting staple in which multiple staples according to any one of claims 1 to 8 are connected.

10. A staple driving tool according to any one of claims 1 to 8, A driving tool having a driver equipped with a striking surface perpendicular to the driving direction so as to make surface contact with the top surface of the staple.

Images