Driving tool

Abstract

The invention provides a driving tool. The driving tool (10) is provided with a plate-shaped driving device (2) which is provided with rack teeth. And the lifter is engaged with the rack. The lifter is used for moving the driver (2). And the rammer (3) is connected with the top (2c) of the driver (2). The ram (3) is used for impacting the driven-in piece (8). The area of the impact surface (3a) of the ram (3) is larger than the area of the top (2c) of the driver (2). Thus, a ram (3) having a larger area than the top (2c) of the driver (2) impacts the driver (8). Therefore, the driven piece can be impacted in a large range through a simple structure.

Description

Technical Field

[0001] The present invention relates to a driving tool for driving nails, staples and other driving elements into wood and the like. Background Art

[0002] In Patent Document 1, there is disclosed a gas spring type driving tool that uses the thrust of compressed gas as an impact force (striking force). The driving tool has a rectangular plate-shaped driver that is long in the driving direction. The driver moves in the driving direction by air pressure to impact (strike) the driving element. The driver moving in the driving direction returns in the direction opposite to the driving direction by a lifter arranged on the side. The lifter engages with a rack tooth formed on the side portion of the driver to return the driver to the initial position.

[0003] The driver impacts the circular flange-shaped head of the driving element through its square-shaped end face portion. Therefore, the impact force of the driver is concentrated in one area of the head of the driving element. As a result, the driver may not be able to apply force correctly to the driving element. In addition, when a jam occurs, the head of the driving element sometimes gets caught in the gap between the driver and the driver guide. In this case, the tip of the driver may be damaged. To address such problems, in the prior art, there is a need for a driver that applies an impact force through a larger surface corresponding to the circular shape of the head. However, a rod-shaped driver may be heavier than a rectangular plate-shaped driver. Moreover, it becomes difficult to machine rack teeth on the driver. [Prior Art Documents] [Patent Documents]

[0004] Patent Document 1: Japanese Patent Grant Gazette No. 6627990 Summary of the Invention [Technical Problem to be Solved by the Invention]

[0005] Therefore, there has always been a need for a driving tool with a simple structure that can impact a driving element within a large range. [Technical Solution for Solving the Technical Problem]

[0006] According to one aspect of the present invention, the driving tool has a plate-shaped driver, and the driver has rack teeth. The lifter engages with the rack teeth. The lifter is used to move the driver. A striker is connected to the end of the driver. The striker is used to impact the driving element. The area of the impact surface of the striker is larger than the area of the end of the driver. Therefore, the striker with an area larger than the end of the driver impacts the driving element. Compared with the structure in which the end of the driver impacts the driving element, it is easier to impact the driving element over a larger range. By means of a simple structure in which the striker is connected to the end of the driver, an increase in weight can be suppressed. Description of the Drawings

[0007] Figure 1 The left view of the driving tool in a state where the left housing is removed. Figure 2 is Figure 1 Sectional view taken along line II-II. Figure 3 The enlarged sectional view of the machine head. Figure 4 is Figure 3 Sectional view taken along line IV-IV. Figure 5 The exploded perspective view of the machine head and the driver. Figure 6 is the state where the driver moves to the loading position and corresponds to Figure 3 the corresponding figure. [Description of the Reference Numerals] 10: Driving tool; 11: Handle; 12: Trigger; 13: Controller; 14: Battery mounting part; 15: Battery pack; 16: Driving part housing; 17: Switch; 18: Nail magazine; 19: Feeding mechanism; 1: Tool body; 1a: Housing; 1b: Cylinder; 1c: Piston; 1d: Accumulator chamber; 1e: Damper; 2: Driver; 2a: Engaged part (rack teeth); 2b: Protrusion; 2c: Top (end); 2d: Driver insertion hole; 2e: Top end face; 3: Striker; 3a: Impact surface; 3b: Arc part; 3c: First cut edge; 3d: Guide surface; 3e: First cut surface; 3f: Second cut surface; 3h: Mounting groove (mounting recess); 3j: Second cut edge; 3k: First insertion hole; 3m: Second insertion hole; 4: Pin; 5: Machine head; 5a: Driver guide; 5b: Driving channel; 5c: Ejection port; 5d: Driver guide part; 5e: Striker guide part; 5f: Guide mounting hole (mounting hole); 5h: Contact arm; 5k: Arm mounting hole; 5m: Guide channel; 5n: Recess; 5p: Right support part; 5r: Left support part; 6: Lifter; 6a: Wheel part; 6b: Rotation axis; 6c: Engagement part; 7: Driving part; 7a: Motor; 7b: Reduction gear train; 7c: Motor axis; 8: Driving element; 8a: Nail head. Detailed implementation mode

[0008] According to another aspect of the present invention, the ram is detachably connected to the driver. Accordingly, the ram can be easily replaced.

[0009] According to another aspect of the present invention, the driving member has a head, at least a part of which is an arc. The ram has an arc portion. Therefore, the ram can easily perform an impact corresponding to the head of the driving member.

[0010] According to another aspect of the present invention, the driving tool has a nail magazine that houses the driving members. The impact surface of the ram has a cut edge that is shaped like a cut of a circle. The ram is arranged such that the cut edge faces the nail magazine. Usually, in the nail magazine, a plurality of driving members are housed in a row-connected manner. Therefore, by having the cut edge face the nail magazine, the ram is less likely to interfere with the driving members arranged after the driven driving member.

[0011] According to another aspect of the present invention, an installation recess is formed in the ram for the end of the driver to be inserted therein. Therefore, the end of the driver with a relatively small diameter can be assembled to the ram with a relatively large diameter with good assembly and reasonably.

[0012] According to another aspect of the present invention, the driving tool has a pin inserted into the driver and the ram. Therefore, the driver and the ram can be connected to each other through a simple structure of inserting the pin.

[0013] According to another aspect of the present invention, the driving tool has a driver guide that is cylindrical and is used to guide the movement of the driver. An installation hole is formed in the driver guide and opens outward. The installation hole allows the pin to be inserted into the driver and the ram. Accordingly, in a state where the driver and the ram are arranged inside the driver guide, the driver and the ram are connected to each other.

[0014] According to another aspect of the present invention, the driving tool has a nail magazine. The nail magazine is used to house the driving members supplied to the driver guide. A guide channel is used to guide the driving members from the nail magazine to the driving channel. The guide channel is located on the extension line of the installation hole. Therefore, the pin inserted from the installation hole can be pushed out to the guide channel. Accordingly, the connection between the driver and the ram can be simply released.

[0015] According to another aspect of the present invention, the driver guide has a driver guiding portion and a ram guiding portion. The driver guiding portion is used to guide the movement of the driver; the ram guiding portion is used to guide the movement of the ram. Therefore, the driver guide can guide the movement of the ram. Accordingly, the deviation of the ram during the impact on the driving member can be suppressed. As a result, the ram can appropriately impact the driving member.

[0016] According to another aspect of the present invention, the driver is stopped and held in the standby position by the lifter. The mounting hole is arranged such that the pin can be inserted into the driver when the driver is in the standby position. Therefore, the pin can be disassembled and assembled while the driver is on standby in the standby position.

[0017] According to another aspect of the present invention, the driving tool has a piston and a cylinder, the piston is connected to the driver; the cylinder generates air pressure through the piston. Therefore, the driver can impact the driving member through the air pressure.

[0018] Next, Figures 1 - 6 an embodiment of the present invention will be described. As Figure 1 shown, the driving tool 10 is, for example, a gas spring type that uses air pressure to drive the driving member. In the following description, the driving direction of the driving member is defined as downward, and the direction opposite to the driving direction is defined as upward. The user holds the driving tool 10 by hand and is located on the right side in Figure 1 . The near side of the user is defined as the rear (user side), and the inner side is defined as the front. The left and right directions are defined based on the user.

[0019] As Figure 1 shown, the driving tool 10 has a tool body 1. The tool body 1 has a substantially cylindrical outer shell 1a. The outer shell 1a is used to house the cylindrical cylinder 1b and the machine head 5 connected to the lower part of the cylinder 1b. The lower part of the machine head 5 protrudes downward from the outer shell 1a.

[0020] As Figure 1 shown, the machine head 5 has a metal driver guide 5a and a contact arm 5h mounted on the lower part of the driver guide 5a. The contact arm 5h can slide up and down relative to the driver guide 5a. The contact arm 5h is biased to move downward relative to the driver guide 5a. The contact arm 5h moves upward, for example, by being pushed by the driven member.

[0021] As Figure 3 shown, a driving channel 5b is formed inside the driver guide 5a. The driver guide 5a has a guide channel 5m protruding rearward from the driving channel 5b. The guide channel 5m is a plate-like member protruding obliquely upward toward the rear. The guide channel 5m is composed of a single member integral with the driver guide 5a. The driver guide 5a is coupled to the nail magazine 18 through the guide channel 5m. The nail magazine 18 houses a plurality of driving members 8. Each driving member 8 is supplied to the driver guide 5a in a posture extending vertically from the nail magazine 18 one by one. Each driving member 8 is guided to the driving channel 5b through the guide channel 5m.

[0022] As Figure 2As shown in the figure, the cylinder 1b holds the piston 1c in a slidable manner. The piston 1c can move up and down inside the cylinder 1b. The upper part of the cylinder 1b above the piston 1c communicates with the accumulator chamber 1d. In the accumulator chamber 1d, compressed gas such as air is enclosed, for example. The air pressure in the accumulator chamber 1d acts as a thrust force to move the piston 1c downward. A damper 1e is arranged at the lower part of the cylinder 1b. The damper 1e is used to bear the piston 1c that moves downward to the lower end. The damper 1e absorbs the impact of the piston 1c at the lower end.

[0023] As Figure 2 shown in the figure, a punch 2 that is long in the vertical direction is coupled to the lower surface of the piston 1c. The punch 2 moves downward inside the punch guide 5a as the piston 1c moves downward. The punch 2 impacts one punch member 8 supplied to the punching channel 5b. The impacted punch member 8 is ejected from the ejection port 5c. The ejected punch member 8 punches the workpiece to be punched.

[0024] As Figure 1 shown in the figure, a grip 11 for the user to hold is provided at the upper rear side of the housing 1a. The grip is substantially cylindrical. The grip 11 extends rearward. A battery mounting portion 14 is provided at the rear part of the grip 11. The battery pack 15 can be detachably mounted on the rear surface of the battery mounting portion 14. The battery pack 15 can be detached from the battery mounting portion 14 and repeatedly charged with a separately prepared charger for use. The battery pack 15 operates as a power source for supplying electric power to the drive unit 7 described later.

[0025] As Figure 1 shown in the figure, the battery mounting portion 14 is a box-shaped member extending vertically. A controller 13 is provided inside the battery mounting portion 14. A substantially cylindrical drive unit housing 16 is integrally connected to the front lower side of the battery mounting portion 14. The front part of the drive unit housing 16 is integrally connected to the lower rear side of the housing 1a. The drive unit 7 is housed inside the drive unit housing 16. The drive unit 7 has a motor 7a as a drive source and a reduction gear train 7b connected to the motor 7a.

[0026] As Figure 1 shown in the figure, a trigger 12 for the user to perform a trigger operation with a fingertip is provided at the lower front side of the grip 11. The trigger operation of the trigger 12 becomes effective by the contact arm 5h moving relatively upward with respect to the punch guide 5a. A switch 17 is provided above the trigger 12. By the trigger operation of the trigger 12, the switch 17 is pushed upward. Accordingly, the switch 17 becomes in an on state. The switch 17 in the on state sends a signal to the controller 13. The controller 13 operates the motor 7a according to the signal sent. The rotational output of the motor 7a is decelerated by the reduction gear train 7b and output to the lifter 6 in the front. The lifter 6 rotates coaxially with the motor axis 7c.

[0027] As Figure 2 shown, the lifter 6 is disposed at the lower right of the cylinder 1b. By rotating the lifter 6, the downwardly moving driver 2 and the piston 1c are integrally returned upward. The lifter 6 has a rotating shaft 6b connected to the drive unit 7 (see Figure 1 ) and a wheel portion 6a supported by the rotating shaft 6b. The rotating shaft 6b rotates in the direction of arrow R ( Figure 2 the counterclockwise direction in

[0028] As Figure 2 shown, the driver 2 is a plate-like member having a square cross section. The driver 2 has a plurality of engaged portions 2a. Each engaged portion 2a projects to the right from the right side portion of the driver 2. Each engaged portion 2a is formed in a rack tooth shape. Specifically, six engaged portions 2a are arranged in the longitudinal direction (vertical direction) of the driver 2. The bottom of each engaged portion 2a faces the driving direction side (lower side). The bottom of each engaged portion 2a engages with each engaging portion 6c of the lifter 6. Therefore, the driver 2 is supported from below by the lifter 6. Then, by rotating the lifter 6 in the R direction, the engaging portion 6c sequentially engages with the engaged portion 2a of the driver 2. As a result, the driver 2 and the piston 1c are returned upward. By the return of the piston 1c, the air pressure in the accumulator chamber 1d increases. In addition, Figure 2 and Figure 3 show the state in which the driver 2 is set at the standby position before the driving operation.

[0029] As Figure 2 , Figure 3 shown, the driver 2 has a convex portion 2b that is long in the vertical direction. The convex portion 2b projects forward from the front surface portion of the driver 2. The convex portion 2b is formed at the central portion of the driver 2 in the vertical direction. As Figure 4As shown, an ejector guide portion 5d that supports the ejector 2 from the periphery is formed inside the ejector guide 5a. The ejector guide portion 5d has a substantially square cross-section that conforms to the shape of the ejector 2. The ejector guide portion 5d can guide the up-and-down movement of the ejector 2. The ejector guide portion 5d supports the ejector 2 from the left side by its left support portion 5r. The left support portion 5r bears the leftward pressure applied to the ejector 2 when the lifter 6 rotates. The left support portion 5r can prevent the ejector 2 from deforming leftward due to the pressure from the lifter 6. In addition, a recess 5n that recesses along the convex portion 2b of the ejector 2 is formed in the ejector guide portion 5d. The recess 5n can prevent interference between the ejector guide portion 5d and the convex portion 2b. The right support portion 5p of the recess 5n can support the convex portion 2b from the right side. Thereby, the ejector 2 can be prevented from falling off to the right side.

[0030] As Figure 2 , Figure 3 shown, the ejector 2 has a ram 3 mounted on the top 2c of the ejector 2. The ram 3 moves up and down integrally with the ejector 2 inside the ejector guide 5a. The ram 3 strikes the ejector 8 supplied to the ejection channel 5b by moving the ejector 2 downward. As Figure 3 shown, the ram 3 strikes the circular flange-shaped nail head portion 8a of the ejector 8. The ejector guide 5a has a ram guide portion 5e that supports the periphery of the ram 3. The ram guide portion 5e can guide the up-and-down movement of the ram 3. The inner diameter of the ram guide portion 5e is larger than the inner diameter of the ejector guide portion 5d.

[0031] As Figure 5 shown, the ram 3 is a substantially cylindrical metal part. An impact surface 3a that abuts against the nail head portion 8a during impact is formed on the lower surface of the ram 3. The impact surface 3a has a substantially circular shape that conforms to the shape of the nail head portion 8a. The impact surface 3a has an arc portion 3b that conforms to the periphery of the nail head portion 8a and a first cut edge 3c and a second cut edge 3j formed by cutting a part of the arc portion 3b. The first cut edge 3c and the second cut edge 3j are formed in a shape that is symmetric with respect to the center of the impact surface 3a. The impact surface 3a is larger than the top surface 2e of the ejector 2 having a square cross-section. In addition, due to the arc portion 3b, the impact surface 3a conforms to the shape of the nail head portion 8a. Therefore, the ram 3 can strike the nail head portion 8a comprehensively within a relatively large area range. Therefore, the ram 3 can efficiently strike the ejector 8. Moreover, deformation of a part of the nail head portion 8a during impact can be suppressed.

[0032] As Figure 5 shown, a guide surface 3d and a first cut surface 3e and a second cut surface 3f formed by cutting a part of the guide surface 3d are formed on the peripheral side surface of the ram 3. The guide surface 3d is supported by the ram guide portion 5e (see Figure 2)。The first cut surface 3e faces forward. The second cut surface 3f faces backward. The first cut surface 3e and the second cut surface 3f are formed in a shape that is symmetric with respect to the central axis of the ram 3. Therefore, the ram 3 is formed in a shape that is symmetric in the front-rear direction.

[0033] As Figure 5 shown, the ram 3 has a mounting groove 3h that is recessed downward from its upper surface. The mounting groove 3h is formed to cover the entire range in the left-right direction. The mounting groove 3h is recessed in a square shape along the shape of the top 2c of the driver 2. The top 2c of the driver 2 is inserted into the mounting groove 3h. The inserted top 2c fits into the mounting groove 3h. In addition, the ram 3 has a first insertion hole 3k and a second insertion hole 3m in the shape of a circular hole that penetrates in the front-rear direction. The first insertion hole 3k is formed in the first cut surface 3e. The second insertion hole 3m is formed in the second cut surface 3f. The central axes of the first insertion hole 3k and the second insertion hole 3m are arranged at positions on the same axis. This same axis passes through the mounting groove 3h.

[0034] As Figure 5 shown, on the top 2c of the driver 2, a driver insertion hole 2d that penetrates in the front-rear direction is formed. The driver insertion hole 2d is formed in the shape of a long hole that is longer in the up-down direction. By inserting the top 2c into the mounting groove 3h, the driver insertion hole 2d communicates with the first insertion hole 3k and the second insertion hole 3m. The pin 4 is pressed in from the front side so as to straddle the communicating first insertion hole 3k, second insertion hole 3m, and driver insertion hole 2d. Accordingly, as Figure 3 shown, the ram 3 is connected to the top 2c of the driver 2.

[0035] As Figure 3 , 5 shown, the driver guide 5a has a guide mounting hole 5f in the shape of a circular hole that penetrates in the front-rear direction. The inner diameter of the guide mounting hole 5f is one size larger than the outer diameter of the pin 4. Therefore, the pin 4 can pass through the guide mounting hole 5f. In addition, the contact arm 5h has an arm mounting hole 5k in the shape of a circular hole that penetrates in the front-rear direction. The inner diameter of the arm mounting hole 5k is larger than the outer diameter of the pin 4. Therefore, the pin 4 can pass through the arm mounting hole 5k. As Figure 3 shown, in a state where the contact arm 5h moves downward relative to the driver guide 5a, the arm mounting hole 5k and the guide mounting hole 5f are arranged on the same axis. Therefore, in a state where the contact arm 5h moves downward, the pin 4 can be inserted from the outside of the machine head 5 into the inside of the driver guide 5a.

[0036] As Figure 3As shown, the driver 2 set at the standby position enters the driving channel 5b. Then, the driver insertion hole 2d, the guide mounting hole 5f, and the arm mounting hole 5k are arranged on the same axis. In addition, the first insertion hole 3k and the second insertion hole 3m of the ram 3 are also arranged on the same axis as the guide mounting hole 5f and the arm mounting hole 5k. Therefore, the pin 4 can be passed through the arm mounting hole 5k and the guide mounting hole 5f and pressed into the first insertion hole 3k, the second insertion hole 3m, and the driver insertion hole 2d. Therefore, inside the driver guide 5a, the ram 3 can be efficiently connected to the driver 2.

[0037] In addition, as Figure 3 shown, the guide channel 5m is located on the extension line behind the guide mounting hole 5f. Therefore, in the state where the driver 2 is set at the standby position, the pin 4 is pushed laterally backward from the guide mounting hole 5f. Accordingly, the pin 4 can be pushed out into the guide channel 5m. Accordingly, the ram 3 can be simply detached from the driver 2. In addition, the ram 3 at the standby position overlaps with the setting position of the driving member 8 (refer to Figure 6 ). Therefore, in the state where the driver 2 is set at the standby position, the driving member 8 is not sent to the setting position. Therefore, when the driver 2 moves downward at an unexpected moment, the driving member 8 is not impacted. Thus, the accidental ejection of the driving member 8 can be reliably prevented.

[0038] Figure 6 It shows the state where the driver 2 is set at the loading position above the standby position and the driving member 8 is set at the setting position. At the loading position, the ram 3 is arranged at a position above the setting position of the driving member 8. Therefore, the driving member 8 can be supplied to the driving channel 5b. The driving member 8 is sent to the driving channel 5b by the feeding mechanism 19. In addition, the second cut surface 3f and the second cut edge 3j of the ram 3 face the rear nail magazine 18. Therefore, when the ram 3 moves downward, it is not likely to interfere with the driving members 8 arranged behind the driving member 8 provided in the driving channel 5b. Thus, the ram 3 can move downward appropriately.

[0039] As described above, as Figure 2 shown, the driving tool 10 has a plate-shaped driver 2, and the driver 2 has an engaged portion 2a. The lifter 6 is engaged with the engaged portion 2a. The lifter 6 is used to move the driver 2. As Figure 3 shown, the ram 3 is connected to the top 2c of the driver 2. The ram 3 is used to impact the driving member 8. The area of the impact surface 3a of the ram 3 is larger than the area of the top 2c of the driver 2. Therefore, the ram 3 with an area larger than the top 2c of the driver 2 impacts the driving member 8. Compared with the structure in which the top 2c of the driver 2 impacts the driving member 8, it is easier to impact the driving member 8 over a larger range. With a simple structure of connecting the ram 3 to the top 2c of the driver 2, the increase in weight can be suppressed.

[0040] As shown Figure 5 in FIG. 1, the ram 3 is detachably connected to the driver 2. Accordingly, the ram 3 can be easily replaced.

[0041] As shown Figure 5 in FIG. 2, the driving member 8 has a nail head 8a, and at least a part of the nail head 8a is an arc. The ram 3 has an arc portion 3b. Therefore, the ram 3 can easily perform an impact corresponding to the nail head 8a of the driving member 8.

[0042] As shown Figure 3 in FIG. 3, the driving tool 10 has a nail magazine 18 that houses the driving members 8. The impact surface 3a of the ram 3 has a second cut edge 3j that is shaped like a cut circle. The ram 3 is arranged such that the second cut edge 3j faces the nail magazine 18. Usually, in the nail magazine 18, a plurality of driving members 8 are housed in a row. Therefore, by having the second cut edge 3j face the nail magazine 18, the ram 3 is less likely to interfere with the driving members 8 arranged after the driven driving member 8.

[0043] As shown Figure 5 in FIG. 4, a mounting groove 3h is formed in the ram 3 for the top 2c of the driver 2 to be inserted therein. Therefore, the top 2c of the driver 2 with a relatively small diameter can be assembled well and reasonably into the ram 3 with a relatively large diameter.

[0044] As shown Figure 3 in FIG. 5, the driving tool 10 has a pin 4 that is inserted into the driver 2 and the ram 3. Therefore, the driver 2 and the ram 3 can be connected to each other by a simple structure of inserting the pin 4.

[0045] As shown Figure 3 in FIG. 6, the driving tool 10 has a cylindrical driver guide 5a for guiding the movement of the driver 2. A guide mounting hole 5f is formed in the driver guide 5a and opens outward. The guide mounting hole 5f allows the pin 4 to be inserted into the driver 2 and the ram 3. Accordingly, with the driver 2 and the ram 3 arranged within the driver guide 5a, the driver 2 and the ram 3 are connected to each other.

[0046] As shown Figure 3 in FIG. 7, the driving tool 10 has a nail magazine 18. The nail magazine 18 is for housing the driving members 8 supplied to the driver guide 5a. A guide passage 5m guides the driving members 8 from the nail magazine 18 to the driving passage 5b. The guide passage 5m is located on the extension line of the guide mounting hole 5f. Therefore, the pin 4 inserted from the guide mounting hole 5f can be pushed out into the guide passage 5m. Accordingly, the connection between the driver 2 and the ram 3 can be simply released.

[0047] As shownFigure 3 As shown, the driver guide 5a has a driver guide portion 5d and a ram guide portion 5e. The driver guide portion 5d is used to guide the movement of the driver 2; the ram guide portion 5e is used to guide the movement of the ram 3. Therefore, the driver guide 5a can guide the movement of the ram 3. Accordingly, the deviation of the ram 3 when impacting the driving member 8 can be suppressed. As a result, the ram 3 can appropriately impact the driving member 8.

[0048] As Figure 2 shown, the driver 2 is stopped and held at the standby position by the lifter 6. As Figure 3 shown, the guide mounting hole 5f is provided so that the pin 4 can be inserted into the driver 2 when the driver 2 is in the standby position. Therefore, the pin 4 can be attached and detached while the driver 2 is on standby at the standby position.

[0049] As Figure 2 shown, the driving tool 10 has a piston 1c and a cylinder 1b. The piston 1c is connected to the driver 2; the cylinder 1b generates air pressure through the piston 1c. Therefore, the driver 2 can impact the driving member 8 through air pressure.

[0050] Various changes can be made to the embodiments described above. For example, a pneumatic spring type driving tool using air pressure is exemplified for the driving tool 10. Instead of this, a mechanical spring type driving tool using spring force is also equally applicable.

[0051] In addition to the notch-shaped groove, the mounting recess of the ram can also be cylindrical or square recessed. A structure in which the ram inserts the end of the driver into its notch-shaped groove and is connected by a pin is exemplified. Instead of this, the externally threaded portion provided on one side can be threadedly engaged with the internally threaded portion provided on the other side. The end of the driver can be press-fitted into the ram. It can also be configured as a structure in which the ram is inserted into the recess provided in the driver and pin-joined. In addition, the driver and the ram can also be connected by any method such as claw engagement or bonding.

[0052] In addition to being cylindrical, the ram can also be disc-shaped. The impact surface of the ram can be a circular shape without a notch edge. The impact surface can be square instead of circular. The impact surface can also be a shape that does not coincide with the head of the driving member, as long as it can impact the driving member through a range larger than the end of the driver. The ram can be non-cylindrical, for example, a structure in which the outer diameter changes along the extending direction like a frustum of a cone. In this case, it is ideal that the impact surface has the largest width diameter. The notch edge of the ram can be configured to be provided only at one part facing the magazine.

[0053] The head of the driving member can be configured to have a notch edge. In this case, it is ideal that the notch edge of the ram is configured to be arranged along the notch edge of the driving member.

[0054] The driving tool 10 of the embodiment is an example of the driving tool of one aspect of the present invention. The engaged portion 2a of the embodiment is an example of the rack teeth of one aspect of the present invention. The driver 2 of the embodiment is an example of the driver of one aspect of the present invention. The lifter 6 of the embodiment is an example of the lifter of one aspect of the present invention. The top portion 2c of the embodiment is an example of the end portion of one aspect of the present invention. The ram 3 of the embodiment is an example of the ram of one aspect of the present invention.

[0055] The driving member 8 of the embodiment is an example of the driving member of one aspect of the present invention. The nail head portion 8a of the embodiment is an example of the head of one aspect of the present invention. The impact surface 3a of the embodiment is an impact surface of one aspect of the present invention. The arc portion 3b of the embodiment is an example of the arc portion of one aspect of the present invention.

[0056] The second cut edge 3j of the embodiment is an example of the cut edge of one aspect of the present invention. The nail magazine 18 of the embodiment is an example of the nail magazine of one aspect of the present invention.

[0057] The mounting groove 3h of the embodiment is an example of the mounting recess of one aspect of the present invention.

[0058] The pin 4 of the embodiment is an example of the pin of one aspect of the present invention.

[0059] The driver guide 5a of the embodiment is an example of the driver guide of one aspect of the present invention. The guide mounting hole 5f of the embodiment is an example of the mounting hole of one aspect of the present invention.

[0060] The guide passage 5m of the embodiment is an example of the guide passage of one aspect of the present invention.

[0061] The driver guide portion 5d of the embodiment is an example of the driver guide portion of one aspect of the present invention. The ram guide portion 5e of the embodiment is an example of the ram guide portion of one aspect of the present invention.

[0062] The piston 1c of the embodiment is an example of the piston of one aspect of the present invention. The cylinder 1b of the embodiment is an example of the cylinder of one aspect of the present invention.

Claims

1. A driving tool, characterized in that: It has a driver, a lifter and a hammer, wherein: The driver is plate-shaped and has rack teeth; The lifter is engaged with the rack teeth to move the driver; The hammer is connected to the end of the driver and is used to impact the driven part. An area of ​​an impact surface of the hammer is larger than an area of ​​the end portion of the driver.

2. The driving tool according to claim 1, characterized in that The hammer is connected to the driver in a detachable manner.

3. The driving tool according to claim 1 or 2, characterized in that: The driven component has a head, at least a portion of which is an arc. The hammer has an arc portion.

4. The driving tool according to any one of claims 1 to 3, characterized in that The impact surface of the hammer has a notched edge, and the notched edge is in a shape obtained by notching a circle. The striker is arranged in such a way that the cut edge faces a nail box, wherein the nail box is used to accommodate the driven piece.

5. The driving tool according to any one of claims 1 to 4, characterized in that The hammer is formed with a mounting recess into which the end of the driver is inserted.

6. The driving tool according to any one of claims 1 to 5, characterized in that A pin is provided which is inserted into the driver and the hammer.

7. The driving tool according to claim 6, characterized in that A driver guide is provided, which is cylindrical and used to guide the movement of the driver. A mounting hole is formed on the driver guide, the mounting hole opening outwardly to allow the pin to be inserted into the driver and the hammer.

8. The driving tool according to claim 7, characterized in that It has a nail magazine and a guide channel, wherein The nail magazine is used to accommodate the driving member supplied to the driving device guide; The guide channel is used to guide the driving member from the nail magazine to the driving channel. The guide channel is located on the extension line of the mounting hole.

9. The driving tool according to claim 7 or 8, characterized in that The driver guide has a driver guide portion and a hammer guide portion, wherein: The driver guide portion is used to guide the movement of the driver; The hammer guide portion is used to guide the movement of the hammer.

10. The driving tool according to any one of claims 7 to 9, characterized in that The driver is stopped by the lifter and held in a standby position. The mounting hole is provided so that the pin can be inserted into the driver when the driver is located at the standby position.

11. The driving tool according to any one of claims 1 to 10, characterized in that A piston and a cylinder, wherein The piston is connected to the driver; The cylinder generates air pressure through the piston.

Images