Driving tool

Abstract

To provide a driving tool that drives a to-be-driven piece by moving a driver by means of gas pressure and returns the driver from a lower movement end to an upper movement end position by engaging with the rotation of a lifter, the driving tool being designed to reduce the cost of a driver and make a lift mechanism compact, by using a thin material, thereby solving the problem in that, when the feeding direction of a magazine is inclined with respect to the rotational axis of the lifter, the striking portion and the engagement portion of the driver are inclined with each other, resulting in the increased thickness of a material for manufacturing the driver by cut machining, hence an increased machining cost.SOLUTION: An engagement portion 21 of a driver 20 has an engagement-portion front surface 21F on the same plane as a striking-portion front surface 22F and an engagement-portion rear surface 21R on the same plane as a striking-portion rear surface 22R. An engagement surface 21a of the engagement portion 21 is constituted of a surface substantially parallel to a rotation axis J of a lifter 33. In a manufacturing process of the driver 20, after a raw material thinner than a conventional one is cut into a flat plate shape in the same plane from the engaging portion 21 to a striking portion 22, the engaging surface 21a is cut while being inclined by a feeding angle β.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a driving tool for driving a fastener into a workpiece. [Background Art]

[0002] Patent Document 1 discloses a gas spring-type driving tool that uses the thrust of compressed gas as an impacting force. The gas spring-type driving tool includes a piston that moves up and down within a cylinder, and a driver that is coupled to the piston, moves integrally within a driving passage, and impacts the fastener. The piston and the driver move downward in the driving direction by the gas pressure of a pressure accumulation chamber. The piston and the driver are returned in the reverse driving direction by a lift mechanism.

[0003] The lift mechanism has a wheel that sequentially engages with a plurality of engaging portions provided on the driver. The wheel is rotated by an electric motor. After a driving operation, the wheel rotates and sequentially engages with the engaging portions of the driver, whereby the driver is returned in the reverse driving direction. When the piston is returned in the reverse driving direction, the gas pressure in the pressure accumulation chamber is increased. As the driver is returned, a fastener is supplied to the driving passage. Near the moving end in the reverse driving direction, the engagement of the lift mechanism with the driver is released. This causes the driver to move under the gas pressure, and the impacting operation for the fastener is performed. [Prior Art Documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2022-118833 [Summary of the Invention] [Problem to be Solved by the Invention]

[0005] The driving tool includes a magazine that houses multiple driving tools supplied to the driving passage. The front end of the magazine in the supply direction is coupled to the driving passage. Large magazines are mounted along an oblique direction, for example to the left, around the driving axis, in order to be compactly positioned while avoiding interference with the lift mechanism. In this case, the supply direction of the magazine is inclined with respect to the rotation axis of the wheel. As a result, the driving tools are supplied into the driving passage in an oblique position, angled to one side around the driving axis.

[0006] Therefore, the flat striking portion that strikes the driving tool needs to be inclined around the driving axis with respect to multiple engagement portions that engage with the wheel of the lift mechanism. When a driver in which the striking portion and engagement portions are arranged diagonally around the driving axis is manufactured by machining, a large machining allowance is required for thick material, leading to high costs. In contrast, when the magazine is mounted parallel to the rotation axis of the wheel, the driving tool is supplied in a normal position with its width direction aligned from left to right, so an inexpensive driver in which the striking portion and engagement portions are provided on the same plane can be used. The purpose of this disclosure is to reduce the cost of a driver in a driving tool having a magazine in which the driving tool is supplied in a diagonal position. [Means for solving the problem]

[0007] According to one aspect of this disclosure, the driving tool includes, for example, a driver that moves from above to below to strike the driving tool. The driving tool includes, for example, a lifter located on either the left or right side of the driver and rotating around a rotation axis extending in the front-rear direction to return the driver to its initial position. The driving tool includes, for example, a magazine located on the opposite side of the lifter from the driver and supplying the driving tool from rear to front at a supply angle tilted left-right with respect to the rotation axis of the lifter. For example, the driver is a flat plate oriented in the thickness direction in the direction of supplying the driving tool and has a striking portion that strikes the driving tool, and a plurality of engaging portions that protrude from the striking portion toward the lifter and sequentially engage with the lifter. For example, the engaging portion has a front surface of the engaging portion that is coplanar with the front surface of the striking portion, and a rear surface of the engaging portion that is coplanar with the rear surface of the striking portion. For example, the engaging surfaces of the plurality of engaging portions are composed of surfaces substantially parallel to the rotation axis.

[0008] Therefore, since the striking part and the rack part have front and rear surfaces on the same plane, the driver can be manufactured with minimal machining by using a flat plate-shaped material with sufficient thickness to form the striking part and the engaging part by machining. This makes it possible to reduce the cost of the driver in a driving tool that has a magazine in which the driving tool is supplied in an oblique position along the direction in which it is tilted left and right with respect to the rotation axis of the lifter.

[0009] According to other aspects of this disclosure, the machining method is, for example, a machining method for a driver of a driving tool. The driving tool has, for example, a driver that strikes a driving tool downward. The driving tool has, for example, a lifter that is located either to the left or right of the driver and rotates around a rotation axis that extends in the front-rear direction to return the driver to its initial position. The driving tool has, for example, a magazine that supplies the driving tool from rear to front at a feeding angle that is tilted left-right with respect to the rotation axis of the lifter.

[0010] According to other aspects of this disclosure, for example, a flat material is set in a cutting machine with its thickness direction facing up and down. Next, the top surface of the material is cut into a single flat surface to form the front surface of the driver. Next, the material is inverted and set with its bottom surface facing up, and the bottom surface of the material is cut into a single flat surface to form the rear surface of the driver. Next, the material is set in the cutting machine using a cutting jig so that the top surface of the material is at a supply angle with respect to the setting surface of the cutting machine. Next, a rotary cutting tool is moved along the edge of the material to form multiple engagement parts of the driver on the edge. Next, the material is set in the cutting machine so that the top surface is parallel to the setting surface of the cutting machine. Next, a rotary cutting tool is moved along the top surface to form guide grooves extending in the longitudinal direction of the material. When the driver is provided on the driving tool, the engagement parts engage with the lifter.

[0011] Therefore, by machining a material of sufficient thickness with minimal processing allowance, a driver for striking a striking tool whose supply angle is inclined with respect to the lifter's rotation axis can be manufactured at low cost. Multiple engaging parts are machined after being re-set at an angle such that the top surface of the material is at the supply angle. [Brief explanation of the drawing]

[0012] [Figure 1] This is an overall perspective view of the driving tool. This diagram shows the tool as viewed from the front, slightly to the left. [Figure 2] This is a left side view of the driving tool. [Figure 3] This is a view from arrow III in Figure 2, and is a bottom view of the driving tool. [Figure 4] This is a view taken via arrow IV in Figure 2, and is a top view of the driving tool. [Figure 5] Figure 2 shows a front view of the internal structure of the tool body and the driving nose section, viewed from the direction of arrow V. This figure shows the driver in its initial standby position. [Figure 6] Figure 2 shows a front view of the tool body and the internal structure of the driving nose section, viewed from the direction of arrow V. This figure shows the driving state with the driver at the lower moving end. [Figure 7] It is a cross-sectional view taken along line VII-VII in FIG. 2. [Figure 8] It is an enlarged view of portion VIII in FIG. 7. [Figure 9] It is a front view of the driver as viewed from the direction of arrow IX in FIG. 8 (the direction of the magazine feed axis M). [Figure 10] It is a left side view of the driver as viewed from the direction of arrow X in FIG. 9. [Figure 11] It is a bottom view of the driver as viewed from the direction of arrow XI in FIG. 9. [Figure 12] It is a diagram showing a processing procedure for a driver. This figure shows the step of cutting the upper surface of a raw material to form the front surface of the driver. [Figure 13] It is a diagram showing a processing procedure for a driver. This figure shows the step of cutting the lower surface of a raw material to form the rear surface and relief surface of the driver. [Figure 14] It is a diagram showing a processing procedure for a driver. This figure shows the step of cutting each engaging portion using a processing jig. [Figure 15] It is a diagram showing a processing procedure for a driver. This figure shows the step of cutting a guide groove on the front surface of the striking portion. DESCRIPTION OF EMBODIMENTS

[0013] In one or more embodiments, for example, the present invention has a plurality of engaging pins arranged along the outer peripheral edge of a lifter and sequentially engaging with a plurality of engaging portions of the driver. Accordingly, the driver is returned upward by sequentially engaging the plurality of engaging pins with the engaging portions of the driver.

[0014] In one or more embodiments, for example, the lifter has a front flange that supports front ends of the plurality of engaging pins, and a rear flange that supports rear ends of the plurality of engaging pins. Accordingly, the plurality of engaging pins are each supported at both ends by the front flange and the rear flange of the lifter.

[0015] In one or more embodiments, for example, a relief surface inclined relative to the rear surface of the engaging portion of the driver is formed on the rear surface of the engaging portion to avoid interference with the rear flange of the lifter. Accordingly, the driver can be compactly arranged relative to the lifter while avoiding interference of the rear surface of the engaging portion with the rear flange.

[0016] In one or more embodiments, for example, the driving tool includes a piston that is moved by gas pressure. For example, the driver has a plate-shaped coupling portion coupled to the piston. For example, the front surface of the coupling portion coincides with the front surface of the striking portion, and the rear surface of the coupling portion coincides with the rear surface of the striking portion. Accordingly, the driver is coupled to the piston via the coupling portion provided flush with the striking portion.

[0017] In one or more embodiments, for example, the tip end of the striking portion is thinner than the main body portion of the striking portion. Accordingly, the weight of the driver is reduced.

[0018] In one or more embodiments, for example, the front flange of the lifter has, on the entire circumference thereof, a relief surface inclined with respect to a plane orthogonal to the rotation axis in order to avoid interference with the front surface of the engaging portion. Accordingly, the driver can be compactly arranged relative to the lifter while avoiding interference of the front surface of the engaging portion with the front flange of the lifter.

[0019] In one or more embodiments, for example, the supply angle of the magazine is 5° to 15° with respect to a direction parallel to the rotation axis of the lifter. Accordingly, the driving tool is supplied into the driving passage in an oblique posture inclined at 5° to 20° with respect to a plane orthogonal to the rotation axis of the lifter.

[0020] In one or more embodiments, for example, after forming the rear surface of the driver, the corner portion on the rear surface side of the raw material is cut in a direction inclined at the supply angle to form a relief surface for avoiding interference of the engaging portion with the lifter. Accordingly, after cutting the relief surface of the engaging portion, for example, the upper surface of the raw material is set to the supply angle using a processing jig, and a plurality of engaging portions are cut. Example

[0021] In the embodiments of this disclosure, a gas spring type driving tool is provided as an example of the driving tool 1, which utilizes the gas pressure of a pressure accumulator chamber above the cylinder as thrust for driving in a driving tool t. For example, a rod-shaped nail is applied to the driving tool t. In the following description, the driving direction of the driving tool t is defined as downward, and the opposite direction is defined as upward. The user of the driving tool 1 is positioned to the right of the driving tool 1 (grip 3 side) in Figures 1 and 2. The side in front of the user is defined as the rear direction (user side), and the side opposite to the front is defined as the front direction. The left and right directions are based on the user holding the grip 3.

[0022] As shown in Figures 1-6, the driving tool 1 has a tool body 10. The tool body 10 has a configuration in which a cylinder 12 is housed in a generally cylindrical body housing 11. A piston 13 is housed inside the cylinder 12 so as to be able to reciprocate up and down. The upper part of the cylinder 12 above the piston 13 is connected to a pressure accumulator 14. Compressed gas, such as air, is sealed inside the pressure accumulator 14. The gas pressure in the pressure accumulator 14 acts as a thrust that moves the upper surface of the piston 13 downward.

[0023] A driving nose section 15 is provided at the bottom of the tool body 10. The driving nose section 15 includes a driver guide 16 and a contact arm 16a. The inner circumference of the driver guide 16 forms a driving passage 17. The driving passage 17 is connected to the inner circumference of the cylinder 12. A long driver 20 is inserted into the driving passage 17 so as to be able to reciprocate up and down. By pressing the contact arm 16a against the material to be driven W and moving it relatively upward, the pull operation of the switch lever 4 becomes effective.

[0024] A magazine 2 is attached to the rear side of the driving nose section 15. Multiple driving tools t are loaded into the magazine 2. The driving tools t in the magazine 2 are fed towards the driving nose section 15 along the supply axis M. In conjunction with the driving operation of the tool body 10, one driving tool t at a time is supplied from the magazine 2 to the driving passage 17 of the driving nose section 15. One driving tool t supplied into the driving passage 17 is struck by the downward-moving driver 20.

[0025] As shown in Figures 1 and 2, the magazine 2 extends in a direction inclined at a supply angle α with respect to a reference plane S perpendicular to the driving direction (vertical direction), with the rear side displaced upward. Furthermore, as shown in Figures 3 and 4, the magazine 2 extends in a direction inclined at a supply angle β with respect to the rotation axis J of the lifter 33, which will be described later, with respect to the rear side displaced to the left. Thus, the magazine 2 is supported in a front-to-back inclined position with respect to the driving nose portion 15, where the rear side is displaced upward when viewed from the side, and in a left-to-right inclined position with respect to the rear side displaced to the left when viewed from below or above. For this reason, the supply direction (supply axis M) of the driving tool t loaded into the magazine 2 is inclined at a supply angle α with respect to the reference plane S perpendicular to the driving direction, and at a supply angle β with respect to the rotation axis J of the lifter 33, which will be described later. In this embodiment, the supply angle β is set to, for example, 12.5°. The supply angle β of the magazine 2 can be changed in the range of, for example, 5° to 15°.

[0026] A grip 3 for the user to hold is provided on the rear side of the tool body 10. A start switch lever 4, operated by the user pulling it with their fingertips, is provided on the front lower surface of the grip 3. A battery mounting section 5 is provided at the rear of the grip 3. A battery pack 6 is mounted on the rear surface of the battery mounting section 5. The battery pack 6 can be attached to and detached from the battery mounting section 5 by sliding it up and down. The battery pack 6 can be reused by removing it from the battery mounting section 5 and charging it with a separately prepared charger. The battery pack 6 is versatile and can also be used as a power source for other power tools. The electric motor 31 of the lift mechanism 30, which will be described later, operates using the power from the battery pack 6 as its power source.

[0027] As shown in Figures 5 and 6, a lower end damper 19 is positioned at the bottom of the cylinder 12 to absorb the impact at the lower moving end of the piston 13. A driver 20 is coupled to the center of the lower surface of the piston 13. The driver 20 extends long downward from the lower surface of the piston 13. The tip side (lower side) of the driver 20 in the driving direction enters the driving passage 17 via the inner circumference side of the lower end damper 19. The driver 20 moves downward within the driving passage 17 due to the gas pressure of the pressure accumulator chamber 14 acting on the upper surface of the piston 13. The tip of the driver 20 moving downward within the driving passage 17 strikes a single driving tool t supplied into the driving passage 17. As shown in Figure 6, when the piston 13 reaches its lower end, the struck driving tool t is ejected from the ejection port 18. The ejected driving tool t is driven into the material W to be driven.

[0028] As shown in Figures 1-4, a lift mechanism 30 is provided below the grip 3. The lift mechanism 30 is positioned across the rear surface of the tool body 10 and the battery mounting section 5. The lift mechanism 30 has an electric motor 31 as its drive source. One lifter 33 is supported in front of the electric motor 31 via a reduction gear train 32. As shown in Figure 6, the driver 20 and piston 13, which have reached their lower moving ends, are returned to their upper initial position (the position shown in Figure 5) by the lift mechanism 30.

[0029] As shown in Figures 5 and 6, multiple (eight in the figures) engaging parts 21 are provided on the right side of the driver 20. Each engaging part 21 has a wavy rack tooth shape that protrudes to the right. The multiple engaging parts 21 are arranged at regular intervals in the longitudinal direction (vertical direction) of the driver 20. The lifter 33 of the lift mechanism 30 is sequentially engaged with the multiple engaging parts 21.

[0030] A lifter 33 is positioned to the right of the driver 20. The lifter 33 has a plurality (e.g., 8) of engagement pins 34 that sequentially engage with the engagement portion 21 of the driver 20. A cylindrical shaft member is used for each engagement pin 34. The plurality of engagement pins 34 are arranged at regular intervals along the outer edge of the lifter 33.

[0031] As shown in Figures 7 and 8, the lifter 33 integrally comprises a front flange 33a, a rear flange 33b, and a main body 33c. The front flange 33a and rear flange 33b protrude radially parallel to each other from the edges of the main body 33c. The output shaft 35 of the reduction gear train 32 is inserted through the inner circumferential hole 33d of the main body 33c. The lifter 33 is rotationally integrated with the output shaft 35 via the inner circumferential hole 33d of the main body 33c. Multiple engagement pins 34 are supported at both ends, straddling the front flange 33a and the rear flange 33b.

[0032] A relief surface 33e is formed around the entire rear surface of the front flange 33a. The relief surface 33e is inclined at a certain angle (for example, the supply angle β of the magazine 2) with respect to a reference plane S perpendicular to the rotation axis J of the lifter 33. This allows the driver 20 to be positioned closer to the lifter 33 while avoiding interference between the front surface 21F of the engaging portion of the driver 20 and the front flange 33a of the lifter 33. This makes the lift mechanism 30 and the driving nose portion 15 more compact.

[0033] A large gap in the rotational direction (a region where no engagement pins 34 exist) is provided between the first and last engagement pins 34 of the lifter 33 in the rotational direction. When this gap is directed toward the driver 20, the engagement state of the lifter 33 with respect to the engagement portion 21 of the driver 20 is released. Figure 5 shows the standby state just before the engagement state is released. Figure 6 shows the driven state after the engagement state has been released.

[0034] When the electric motor 31 is started, the lifter 33 rotates in the direction of arrow R (counterclockwise in Figures 5 and 6). As shown in Figure 6, after the driver 20 reaches its lower moving end, the rotation of the lifter 33 in the direction of arrow R causes the engagement pins 34 to sequentially engage with the engagement portion 21 of the driver 20 from below, thereby returning the driver 20 upward. The lift mechanism 30 returns the piston 13 upward, increasing the gas pressure in the accumulator chamber 14. When the driver 20 returns to the initial position shown in Figure 5, the electric motor 31 stops, and the series of driving operations ends.

[0035] When the switch lever 4 is pulled again, the lift mechanism 30 restarts. This causes the lifter 33 to rotate in the direction of arrow R, disengaging from the engaging portion 21 of the driver 20. As a result, the driver 20 moves downward due to the gas pressure in the accumulating chamber 14 acting on the piston 13. As the driver 20 moves downward in the driving passage 17, the driving tool t is struck and driven into the material W to be driven.

[0036] The portion of the driver 20 excluding the engagement portion 21 is designated as the striking portion 22. Multiple engagement portions 21 are provided along the right side of the striking portion 22. A coupling portion 23 is provided at the top of the striking portion 22. A bifurcated coupling portion 13a is provided in the center of the lower surface of the piston 13. The coupling portion 23 of the driver 20 is inserted into the coupling portion 13a and a coupling pin 13b is inserted, thereby connecting the driver 20 to the lower surface of the piston 13. This connects the driver 20 along the central axis of the piston 13.

[0037] The striking portion 22 has a strip shape with a thickness D. The striking portion 22 has a front surface (striking portion front surface 22F) and a rear surface (striking portion rear surface 22R) that are parallel to each other. The distance between the striking portion front surface 22F and the striking portion rear surface 22R corresponds to the thickness D. The front surface (engaging portion front surface 21F) of each engaging portion 21 is flush with the striking portion front surface 22F. The rear surface (engaging portion rear surface 21R) of each engaging portion 21 is flush with the striking portion rear surface 22R. The front surface (joint portion front surface 23F) of the connecting portion 23 is flush with the striking portion front surface 22F. The rear surface (joint portion rear surface 23R) of the connecting portion 23 is flush with the striking portion rear surface 22R. Hereinafter, the engaging portion front surface 21F, the striking portion front surface 22F, and the connecting portion front surface 23F, which are flush with each other, will be collectively referred to as the front surface 20F of the driver 20. Furthermore, the rear surfaces 21R of the engaging portion, 22R of the striking portion, and 23R of the connecting portion, which are flush with each other, are collectively referred to as the rear surface 20R of the driver 20.

[0038] A guide groove 22a is provided on the front surface 22F of the striking portion 22. The guide groove 22a extends across the entire area from the top to the bottom end of the striking portion 22. The bottom end surface of the striking portion 22 is the striking surface 22b that strikes the driving tool t. The thickness d of the striking surface 22b in the front-rear direction is smaller than the thickness D of the striking portion 22.

[0039] As shown in Figure 8, each engaging portion 21 of the driver 20 has an engaging surface 21a corresponding to its side. Each engaging surface 21a includes a tip ridge 21b. Each engaging portion 21 engages with each engaging pin 34 with its tip ridge 21b positioned parallel to the axis of the engaging pin 34. The axis j of each engaging pin 34 is parallel to the rotation axis J of the lifter 33. As described above, the magazine 2 is positioned with its supply axis M tilted to the left by a supply angle β with respect to the rotation axis J of the lifter 33. The tip ridge 21b of each engaging portion 21 is formed to be inclined by a supply angle β with respect to the supply axis M of the magazine 2. Therefore, the tip ridge 21b of each engaging portion 21 is parallel to the axis j of the engaging pin 34.

[0040] The engagement surface 21a of each engagement portion 21 is perpendicular to the front surface 22F and rear surface 22R of the striking portion 22. As a result, the striking surface 22b strikes the head of the driving tool t in an appropriate orientation (with the left-right direction of the striking surface 22b parallel to the width direction of the driving tool t) relative to the head of the driving tool t supplied along the supply axis M which is tilted by a supply angle β. This results in an efficient driving operation.

[0041] To manufacture the driver 20 by machining, a material 20B with a thickness D + machining allowance (cutting allowance) m is used, as shown in Figure 12. In contrast, in conventional drivers, the front surface of the engaging portion is inclined relative to the front surface of the striking portion, as shown by the dashed line in Figure 12. Therefore, the front surface of the striking portion and the front surface of the engaging portion are not on the same plane. For this reason, conventionally, it was necessary to use a material with a larger thickness V (V>D+m) to account for the inclined engaging portion, and to perform machining on a larger cutting allowance. Also, conventionally, because the front surface of the striking portion and the front surface of the engaging portion are not on the same plane, it is not possible to machine both sides continuously at once. In this embodiment, the front surface of the striking portion 22F, the front surface of the engaging portion 21F, and the front surface of the connecting portion 23F (front surface 20F of the driver 20) can be machined continuously at once with a smaller thickness (D+m) of material 20B and a smaller cutting allowance m than conventional methods. In this respect, the cost of the driver 20 is reduced and the manufacturing process is simplified.

[0042] The machining method for the driver 20 in the following embodiment will be described. In the description of the machining method, instead of the vertical direction of the driving tool 1, the vertical direction (above the set surface, below the set surface) will be used with reference to the set surface 40a of the cutting machine 40. As shown in Figure 12, a flat plate-shaped material 20B with a thickness D + cutting allowance m is set on the set surface 40a of the cutting machine 40. In this process, the material 20B is set in a position where the thickness D direction is perpendicular to the set surface 40a. First, the top surface of the material 20B (the front surface 20F of the driver 20) is machined to be flat and flush. In this process, the rotation axis 41a of the rotary cutting tool 41 is perpendicular to the set surface 40a when machining is performed. This forms the front surface 20F of the driver 20 (the engagement part front surface 21F, the striking part front surface 22F, and the joint part front surface 23F). The machining is performed with a smaller cutting allowance m compared to conventional materials with a thickness V (>D).

[0043] After machining the front surface 20F, the material 20B is set in an inverted position with the thickness D in the direction shown in Figure 13. In this inverted position, the lower surface of the material 20B is facing upward in Figure 13. In this inverted position, the lower surface (upper surface in Figure 13) of the material 20B is machined flush. In this process as well, the rotation axis 41a of the rotary cutting tool 41 is perpendicular to the setting surface 40a when machining is performed. This forms the rear surface 20R of the driver 20 (rear surface 21R of the engaging part, rear surface 22R of the striking part, and rear surface 23R of the connecting part). At this stage, the material 20B is machined to a thickness D.

[0044] Next, while the material 20B remains in the inverted position, the left rear corner is obliquely cut at a supply angle β. This creates a relief surface 21c to avoid interference with the lifter 33. The relief surface 21c is cut, for example, by tilting the rotary cutting tool 41 by a supply angle β.

[0045] Next, as shown in Figure 14, the material 20B is inverted again in the thickness D direction and set. In this step, the upper surface of the material 20B is oriented upward, and it is set in an inclined position so that the relief surface 21c is parallel to the setting surface 40a, for example using a machining jig 42. In this inclined position, the upper surface (front surface 20F of the driver 20) and lower surface (rear surface 20R of the driver 20) of the material 20B are inclined at a supply angle β with respect to the setting surface 40a of the cutting machine 40.

[0046] With the material 20B, which has been machined to a thickness D, set in an inclined position at a supply angle β, each engaging portion 21 is machined by the rotary cutting tool 41. Multiple engaging portions 21 are formed by moving the rotary cutting tool 41 along the right edge of the material 20B. In this process as well, the machining is performed at a right-angle machining position where the rotation axis 41a of the rotary cutting tool 41 is perpendicular to the setting surface 40a. The multiple engaging portions 21 engage with the engaging pins 34 of the lifter 33 when the driver 20 is assembled to the driving tool 1.

[0047] Next, as shown in Figure 15, the material 20B is set in a horizontal position with its upper surface (front surface 20F of the driver 20) facing upward and its lower surface (rear surface 20R of the driver 20) parallel to the setting surface 40a. In this horizontal position, a guide groove 22a is cut into the upper surface of the material 20B by the rotary cutting tool 41. As the rotary cutting tool 41 moves, the guide groove 22a is formed to be long along the longitudinal direction of the material 20B. In addition, a striking surface 22b is cut into the tip of the material 20B by the rotary cutting tool 41. In this process, the cutting is performed at a right-angle machining position where the rotation axis 41a of the rotary cutting tool 41 is perpendicular to the setting surface 40a. The driver 20 manufactured in the above process is assembled to the driving tool 1 with the engaging portion 21 facing the lifter 33.

[0048] According to the embodiment, in a driving tool 1 equipped with a magazine 2 in which the supply direction of the driving tool t is tilted to the left with respect to the rotation axis J of the lifter 33 at a supply angle β, the cost of the driver 20 and the processing method are reduced.

[0049] The driver 20 is a flat plate oriented with its thickness D direction approximately perpendicular to the supply angle β, and has a striking portion 22 for striking the driving tool t, and a plurality of engaging portions 21 that protrude from the striking portion 22 toward the lifter 33 and sequentially engage with the lifter 33. Each engaging portion 21 has an engaging portion front surface 21F that is on the same plane as the striking portion front surface 22F of the striking portion 22, and an engaging portion rear surface 21R that is on the same plane as the striking portion rear surface 22R of the striking portion 22. The engaging surfaces 21a of the eight engaging portions 21 are formed on planes that are approximately parallel to the rotation axis J of the lifter 33.

[0050] Therefore, since the striking portion 22 and the engaging portion 21 have front and rear surfaces on the same plane, the driver 20 can be manufactured with minimal machining allowance m using a flat plate-shaped material 20B with a plate thickness (D+m) sufficient to form the striking portion 22 and the engaging portion 21 by machining. This makes it possible to reduce the cost of the driver 20 and simplify the manufacturing process for a driving tool 1 that has a magazine 2 in which the driving tool t is supplied in an oblique position along a supply axis M that is inclined to the left with respect to the rotation axis J of the lifter 33.

[0051] According to the processing method of the embodiment, the top and bottom surfaces of a flat plate-shaped material 20B with a thickness D having a minimum processing allowance m are each cut into a single flat surface to form the front surface 20F and rear surface 20R of the driver 20. The rotary cutting tool 41 is moved along the edge of the material 20B to form multiple engagement parts 21 on the edge. In this case, the rotary cutting tool 41 is inclined at a supply angle β with respect to the edge of the material 20B when cutting. Therefore, by cutting a material 20B with a sufficient thickness with a minimum processing allowance m, a driver 20 for striking a striking tool t whose supply axis M is inclined with respect to the rotation axis J of the lifter 33 can be manufactured at low cost.

[0052] According to the embodiment, the lifter 33 has eight engagement pins 34 that sequentially engage with the engagement portion 21 of the driver 20. Therefore, the driver 20 is returned upward as the eight engagement pins 34 sequentially engage with the engagement portion 21 of the driver 20.

[0053] According to the embodiment, the lifter 33 has a front flange 33a that supports the front end of the engagement pin 34 and a rear flange 33b that supports the rear end of the engagement pin 34. Thus, each of the eight engagement pins 34 is supported at both ends by the front flange 33a and the rear flange 33b of the lifter 33.

[0054] In this embodiment, the rear surface 21R of the engaging portion of the driver 20 has a relief surface 21c that is inclined relative to the rear surface 21R of the engaging portion in order to avoid interference with the rear flange 33b of the lifter 33. As a result, the driver 20 is positioned closer to the lifter 33 while avoiding interference between the rear surface 21R of the engaging portion and the rear flange 33b. This makes the lift mechanism 30 and the driving nose portion 15 more compact.

[0055] In one embodiment, the driver 20 has a plate-shaped coupling portion 23 that is coupled to the piston 13. The front surface 23F of the coupling portion 23 coincides with the front surface 22F of the striking portion 22, and the rear surface 23R of the coupling portion 23 coincides with the rear surface 22R of the striking portion 22. Therefore, the driver 20 is coupled to the center of the lower surface of the piston 13 via the coupling portion 23 which is provided flush with the striking portion 22.

[0056] According to an embodiment, a thickness d of a striking surface 22b of a striking portion 22 is smaller than a thickness D of the striking portion 22 (d<D). Accordingly, the weight of the driver 20 is reduced.

[0057] According to an embodiment, a front flange 33a of a lifter 33 is provided with an escape surface 33e over the entire circumference, the escape surface 33e being inclined with respect to a surface orthogonal to a rotation axis J to avoid interference with a front surface 21F of an engaging portion. Accordingly, the driver 20 can be arranged closer to the lifter 33 while avoiding interference of the front surface 21F of the engaging portion with the front flange 33a of the lifter 33.

[0058] According to an embodiment, a supply angle β of a magazine 2 is set to 12.5° with respect to a direction parallel to a rotation axis J of a lifter 33. Accordingly, a driving tool t is supplied into a driving passage 17 in an inclined posture inclined by 12.5° with respect to a reference surface S orthogonal to the rotation axis J of the lifter 33.

[0059] According to an embodiment, in a manufacturing process of a driver 20, after a raw material 20B is set on a cutting machine 40 such that a lower surface (a rear surface 20R of the driver 20) faces upward, an escape surface 21c is cut on an upper surface side of an engaging portion 21. The escape surface 21c is formed to be inclined by the supply angle β with respect to the reference surface S, for example. Next, the raw material 20B is turned upside down, and set in an inclined posture where the escape surface 21c is parallel to a setting surface 40a of the cutting machine 40. Eight engaging portions 21 are cut in this inclined posture.

[0060] Various modifications can be made to the embodiments described above. For example, although the case where the supply direction (supply angle β) of the magazine 2 relative to the rotation axis J of the lifter 33 is 12.5° is illustrated, the supply direction of the magazine may be changed within a range of 5° to 15°, for example. A driver corresponding to a magazine with a supply angle β of 5° to 15° can be manufactured by the illustrated processing method, thereby achieving cost reduction of the driver and downsizing of the lift mechanism.

[0061] In the embodiment, a configuration in which the driver 20 has eight engaging portions 21 is exemplified, but the illustrated processing method can also be applied to a driver having six engaging portions or ten engaging portions, for example.

[0062] The relief surface 21c of the driver 20 may be omitted. The relief surface 33e of the lifter 33 may be omitted.

[0063] A configuration in which the thickness d of the striking surface 22b is smaller than the thickness D of the striking portion 22 (d<D) is exemplified, but the thickness may be changed to be the same.

[0064] The driving tool 1 of the embodiment is an example of a driving tool according to one aspect and other aspects of the present disclosure. The piston 13 of the embodiment is an example of a piston according to one aspect and other aspects of the present disclosure. The driving tool t of the embodiment is an example of a driving tool according to one aspect and other aspects of the present disclosure. The driver 20 of the embodiment is an example of a driver according to one aspect and other aspects of the present disclosure. The lifter 33 of the embodiment is an example of a lifter according to one aspect and other aspects of the present disclosure. The output shaft 35 of the embodiment is an example of a rotating shaft according to one aspect and other aspects of the present disclosure.

[0065] The magazine 2 of the embodiment is an example of a magazine according to one aspect and other aspects of the present disclosure. The supply angle β of the embodiment is an example of a supply angle according to one aspect and other aspects of the present disclosure. The thickness D of the embodiment is an example of a thickness according to one aspect and other aspects of the present disclosure.

[0066] The engaging portion 21 of the embodiment is an example of an engaging portion according to one aspect and other aspects of the present disclosure. The striking portion 22 of the embodiment is an example of a striking portion according to one aspect and other aspects of the present disclosure. The front surface 22F of the striking portion of the embodiment is an example of a front surface of a striking portion according to one aspect of the present disclosure. The front surface 21F of the engaging portion of the embodiment is an example of a front surface of an engaging portion according to one aspect of the present disclosure. The rear surface 22R of the striking portion of the embodiment is an example of a rear surface of a striking portion according to one aspect of the present disclosure. The rear surface 21R of the engaging portion of the embodiment is an example of a rear surface of an engaging portion according to one aspect of the present disclosure.

[0067] The processing method or manufacturing process in the embodiment is an example of a processing method in other aspects of the present disclosure. The material 20B in the embodiment is an example of a material in other aspects of the present disclosure. The cutting machine 40 in the embodiment is an example of a cutting machine in other aspects of the present disclosure. The front surface 20F of the driver 20 in the embodiment is an example of the front surface of a driver in other aspects of the present disclosure.

[0068] The machining jig 42 in the embodiment is an example of a machining jig in another aspect of the present disclosure. The setting surface 40a in the embodiment is an example of a setting surface in another aspect of the present disclosure. The rotary cutting tool 41 in the embodiment is an example of a rotary cutting tool in another aspect of the present disclosure. The guide groove 22a in the embodiment is an example of a guide groove in another aspect of the present disclosure. [Explanation of Symbols]

[0069] W... material to be driven in t... driving tool 1… Driving tool 2… Magazine 3…Grip 4…Switch lever 5… Battery mounting section 6…Battery pack 10...Tool body 11…Main housing 12... Cylinder 13... Piston 13a...Connecting part, 13b...Connecting pin 14...Pressure chamber 15... Nose section 16…Driver Guide 16a... Contact arm 17…Driving passage 18...Ejection port 19... Lower end damper J...Axis of rotation of the lifter j...Axis of rotation of the engaging pin S...Reference surface M... Magazine supply axis α... Supply angle in the vertical direction β... Supply angle in the left-right direction 20... Driver 20F…Front, 20R…Rear 20B...Material m...Processing cost (cutting cost) for material 20B V...Thickness of conventional materials 21...Engaging part 21F...Front side of the engaging part, 21R...Rear side of the engaging part 21a...Engaging surface, 21b...Tip edge, 21c...Relief surface 22…Hitting Department 22F...Front of the hitting area, 22R...Rear of the hitting area 22a... Guide groove, 22b... Striking surface 23...Joining part 23F…Front side of joint, 23R…Rear side of joint D...Thickness of the hitting area d... Thickness of the striking surface 30…Lift mechanism 31… Electric motor 32…Reduction gear train 33... Lifter 33a...Front flange, 33b...Rear flange, 33c...Main body, 33d...Inner circumference hole 33e...Escape side 34…Engaging pin 35…Output shaft 40...Cutting machine 40a...Setting surface 41… Rotary cutting tool 41a... Axis of rotation 42… Machining jigs

Claims

1. It is a driving tool, A driver that moves from above to below to strike the driving tool, A lifter located on either the left or right side of the driver and rotating around a rotation axis extending in the front-rear direction to return the driver to its initial position, The driver is located on the opposite side of the lifter, and the magazine supplies the driving tool from rear to front at a supply angle that is tilted left and right with respect to the rotation axis of the lifter, The driver is a flat plate oriented in the thickness direction toward the supply direction of the driving tool, and has a striking portion for striking the driving tool, and a plurality of engaging portions that protrude from the striking portion toward the lifter and sequentially engage with the lifter. The engagement portion has a front surface of the engagement portion that is on the same plane as the front surface of the striking portion, and a rear surface of the engagement portion that is on the same plane as the rear surface of the striking portion. The engagement surfaces of the plurality of engagement parts are composed of surfaces substantially parallel to the rotation axis, A driving tool that inclines the front surface and rear surface of the engaging portion with respect to the rotation axis of the lifter, thereby sequentially engaging the engaging surfaces with the lifter.

2. It is a driving tool, A driver that moves from above to below to strike the driving tool, A lifter located on either the left or right side of the driver and rotating around a rotation axis extending in the front-rear direction to return the driver to its initial position, The driver is located on the opposite side of the lifter, and the magazine supplies the driving tool from rear to front at a supply angle that is tilted left and right with respect to the rotation axis of the lifter, The driver is a flat plate oriented in the thickness direction toward the supply direction of the driving tool, and has a striking portion for striking the driving tool, and a plurality of engaging portions that protrude from the striking portion toward the lifter and sequentially engage with the lifter. The engagement portion has a front surface of the engagement portion that is on the same plane as the front surface of the striking portion, and a rear surface of the engagement portion that is on the same plane as the rear surface of the striking portion. The engagement surfaces of the plurality of engagement parts are composed of surfaces substantially parallel to the axis of rotation, Furthermore, the lifter has a plurality of engagement pins arranged along its outer peripheral edge and sequentially engaging with the plurality of engagement portions of the driver, The lifter has a front flange that supports the front ends of the plurality of engagement pins and a rear flange that supports the rear ends of the plurality of engagement pins. A driving tool having a relief surface formed on the rear surface of the engaging portion of the driver, which is inclined with respect to the rear surface of the engaging portion in order to avoid interference with the rear flange of the lifter.

3. The driving tool according to claim 1, A driving tool having a plurality of engaging pins arranged along the outer edge of the lifter and sequentially engaging with the plurality of engaging portions of the driver.

4. The driving tool according to claim 3, The lifter is a driving tool having a front flange that supports the front ends of the plurality of engagement pins and a rear flange that supports the rear ends of the plurality of engagement pins.

5. The driving tool according to claim 4, A driving tool having a relief surface formed on the rear surface of the engaging portion of the driver, which is inclined with respect to the rear surface of the engaging portion in order to avoid interference with the rear flange of the lifter.

6. A driving tool according to any one of claims 1 to 5, Equipped with a piston that moves by gas pressure, The driver is a driving tool having a plate-shaped coupling portion that is coupled to the piston, wherein the front surface of the coupling portion coincides with the front surface of the striking portion, and the rear surface of the coupling portion coincides with the rear surface of the striking portion.

7. A driving tool according to any one of claims 1 to 5, The tip of the striking part is a driving tool that is thinner in thickness than the main body of the striking part.

8. A driving tool according to claim 4 or 5, The front flange of the lifter is a driving tool having a relief surface around its entire circumference that is inclined with respect to a plane perpendicular to the rotation axis in order to avoid interference with the front surface of the engaging portion.

9. A driving tool according to any one of claims 1 to 5, A driving tool in which the supply angle of the magazine is 5° to 20° with respect to the direction parallel to the rotation axis of the lifter.

10. A method for machining the driver of a driving tool, comprising a driver that strikes the driving tool downward, a lifter located on either the left or right side of the driver and rotating around a rotation axis extending in the front-rear direction to return the driver to its initial position, and a magazine that supplies the driving tool from rear to front at a supply angle tilted in the left-right direction with respect to the rotation axis of the lifter, A flat material is set in a cutting machine with its thickness direction facing up and down, and the upper surface of the material is cut into a single flat surface to form the front surface of the driver. Next, the material is inverted and set so that its bottom surface faces upward, and the bottom surface of the material is machined to form a single flat surface to create the rear surface of the driver. Next, the material is set in the cutting machine using a processing jig so that the upper surface is at the supply angle with respect to the setting surface of the cutting machine, and the rotary cutting tool is moved along the edge of the material to form multiple engagement parts of the driver on the edge. The material is set in the cutting machine so that its upper surface is parallel to the setting surface of the cutting machine, and the rotating cutting tool is moved along the upper surface to form a guide groove extending in the longitudinal direction of the material. A method for machining the driver, wherein when the driver is provided on the driving tool, the engaging portion engages with the lifter.

11. A processing method according to claim 10, After forming the rear surface of the driver, A method for machining the driver, wherein the rear side corner of the material is cut in a direction inclined at the supply angle to form a relief surface for avoiding interference of the engaging portion with the lifter.

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