Driving tool

Abstract

To provide a driving tool with a posture thereof being stabilized so as to solve the problem of conventional ones with an unstable posture in which a gas pressure moves a driver to drive the driver tool, a wheel of a lift mechanism is engaged to return the driver from a lower movement end position to an upper movement end position, a driving passage is provided with a relief passage for allowing the engagement portions of the driver to pass through, the relief passage is provided on the driving passage in communication with the driving passage, and, due to the above-mentioned configuration, the relief passage makes the posture of the driving tool that is supplied to the driving passage unstable.SOLUTION: A guide member 40 is positioned between a driving tool n supplied to a driving passage 20a and a relief passage allowing an engagement portion 15a of a driver 15 to pass therethrough. The relief passage is therefore blocked so as to stabilize a posture of the driving tool n. The guide member 40 is then pushed by the engagement portion 15a of the driver 15 on the lowermost stream side so as to be retreated from the relief passage, thereby allowing the engagement portion 15a to move downward in the relief passage.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a driving tool for driving driving tools such as nails into a driven material.

Background Art

[0002] Patent Document 1 discloses a gas spring type driving tool that uses the thrust of compressed gas as a striking force. The gas spring type driving tool has a piston that moves up and down in a cylinder and a driver that is coupled to the piston and moves integrally in a driving passage to strike a driving tool. The piston and the driver move downward in the driving direction by the gas pressure in the accumulator chamber. The piston and the driver are returned in the counter-driving direction by a lift mechanism.

[0003] The lift mechanism has a wheel that is sequentially engaged with a plurality of engaging portions provided on the driver. The wheel is rotated by an electric motor. After the driving operation, the wheel rotates and is sequentially engaged with the engaging portions of the driver, so that the driver is returned in the counter-driving direction. When the piston is returned in the counter-driving direction, the gas pressure in the accumulator chamber is increased. As the driver is returned, a driving tool is supplied to the driving passage. Near the moving end in the counter-driving direction, the engagement state of the lift mechanism with respect to the driver is released. As a result, the driver moves by the gas pressure and a striking operation of the driving tool is performed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In such a driving tool, the driving passage for the driver's movement has parallel passages for passing through multiple engaging parts provided on the driver. Therefore, the driving posture during impact tends to be unstable, especially with short driving tools. The purpose of this disclosure is to stabilize the driving posture of the driving tool. [Means for solving the problem]

[0006] According to one aspect of this disclosure, the driving tool includes, for example, a piston that moves by gas pressure, and a driver provided on the piston that moves integrally with the piston to strike the driving tool. The driving tool includes, for example, a plurality of engaging parts provided on the driver along the direction of movement of the driver, and a lifter that sequentially engages with the plurality of engaging parts to return the driver to its initial position. The driving tool includes, for example, a driving passage through which the driving tool is supplied and the driver passes, and a relief passage that opens into the driving passage to allow the plurality of engaging parts to pass when the driver passes. The driving tool includes, for example, a guide member that is movable between a closed position that blocks the relief passage and an open position that opens it.

[0007] Therefore, when the guide member is positioned in the closed position and the relief passage is blocked by the guide member, the driving posture of the driving tool within the driving passage is stabilized. When the driver moves downward, the guide member moves to the open position, allowing multiple engaging parts to move within the relief passage. [Brief explanation of the drawing]

[0008] [Figure 1] This is a longitudinal cross-sectional view of the driving tool, seen from the right. This figure shows the driver in its initial position. [Figure 2] This is a longitudinal cross-sectional view of the driving tool, seen from the right. This figure shows the driver in the lower moving end position. [Figure 3] Figure 1 shows a cross-sectional view taken along line III-III, which is a view of the longitudinal section of the driving tool as seen from the front. [Figure 4]This is a longitudinal cross-sectional view of the driver guide. This figure shows a longitudinal cross-sectional view of the driver guide as seen from the right. [Figure 5] Figure 4 shows a view from arrow V, which is a top view of the driver guide. [Figure 6] This is a longitudinal cross-sectional view of the driver guide. This figure shows the state in which the guide member has begun to displace from the closed position to the open position. [Figure 7] This is a longitudinal cross-sectional view of the driver guide. This figure shows the guide member in the open position. [Modes for carrying out the invention]

[0009] In one or more embodiments, for example, the guide member engages with the engagement portion when the driver moves and moves from a closed position to an open position. Therefore, the guide member moves from a closed position to an open position due to the movement of the driver. This eliminates the need for special means to move the guide member.

[0010] In one or more embodiments, for example, the guide member rotates to move between a closed position and an open position. Therefore, the guide member can be moved with a simple support structure.

[0011] In one or more embodiments, for example, the guide member has a pivot point on the upstream side in the driving direction, and the downstream side of the guide member in the driving direction is guided by a movable guide. Therefore, the rotational movement of the guide member is stabilized.

[0012] In one or more embodiments, for example, a driving tool has a biasing member that biases the guide member to a closed position. Thus, the relief passage is held closed by the guide member by the biasing member. The movement of the guide member to the open position is performed against the biasing member.

[0013] In one or more embodiments, for example, the driving tool has a cushioning member that contacts the guide member as it moves from a closed position to an open position. Therefore, the impact when the guide member moves to the open position is absorbed by the cushioning member.

[0014] In one or more embodiments, for example, a guide member extends beyond the movement region of the multiple engagement portions downstream in the driving direction. Thus, the guide member extends over a long area in the driving direction. This ensures greater stability of the driving position of the driving tool.

[0015] In one or more embodiments, for example, the guide member runs along the driving tool supplied to the driving passage and extends downstream of the driving tool in the driving direction. Thus, the supply position of the driving tool at the supply position is stabilized, as is the driving position.

[0016] In one or more embodiments, for example, the guide member is movable in a direction perpendicular to the direction in which the engaging portion protrudes from the driver. Therefore, when the engaging portion of the driver engages, the guide member is pushed and moves to the open position. This allows the guide member to be compactly positioned relative to the driver, resulting in a more compact design in the left-right direction of the driving nose portion.

[0017] In one or more embodiments, for example, the direction of movement of the guide member from the closed position to the open position coincides with the direction of supply of the driving tool to the driving passage. Therefore, compactness is achieved in the direction perpendicular to the direction of movement of the guide member. [Examples]

[0018] Next, one example of an embodiment of the present disclosure will be described based on FIGS. 1 to 7. As an example of the driving tool 1, a gas spring type driving tool that uses the gas pressure in the accumulator chamber above the cylinder as the thrust for driving the driving tool n is shown. In the following description, the driving direction of the driving tool n is downward, and the reverse driving direction is upward. The user of the driving tool 1 is generally located on the left side of the driving tool 1 in FIG. 1. The front side of the user is the rear direction (user side), and the back side opposite to the front side is the front direction. The left and right directions are based on the user.

[0019] As shown in FIGS. 1 to 3, 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 in the cylinder 12 so as to be reciprocable vertically. The upper part of the cylinder 12 above the piston 13 communicates with an accumulator chamber 14. Compressed gas such as air is enclosed in the accumulator chamber 14. The gas pressure in the accumulator chamber 14 acts as a thrust to move the piston 13 downward on the upper surface of the piston 13.

[0020] As shown in FIG. 3, the lower part of the cylinder 12 communicates with a driving passage 20a of a driving nose portion 20 provided at the lower part of the tool body 10. The driving nose portion 20 has a nose frame 21 coupled to the lower surface of the body housing 11 and a driver guide 22 supported on the inner peripheral side of the nose frame 21 so as to be vertically displaceable. The inner peripheral side of the driver guide 22 forms the driving passage 20a. The downstream region of the driving passage 20a is a circumferential guide portion 20d where the wall portion (thick portion) of the driver guide 22 is located over the entire circumference. The driving posture of the driving tool n is guided over the entire circumference by the circumferential guide portion 20d formed over the entire circumference by a single member. Thereby, the stability of the driving posture of the driving tool n is achieved. The lower end of the driver guide 22 (the lower end of the circumferential guide portion 20d) serves as a shooting outlet 20b.

[0021] A spring retaining portion 21a is provided on the rear side of the nose frame 21. A spring receiving portion 22a is provided on the rear side of the driver guide 22. The spring retaining portion 21a and the spring receiving portion 22a are arranged facing each other vertically. A compression spring 23 is interposed between the spring retaining portion 21a and the spring receiving portion 22a. The biasing force of the compression spring 23 biases the driver guide 22 downward. As a result, as shown in Figure 1, the lower end of the driver guide 22 (exit port 20b) normally protrudes from the lower end of the nose frame 21.

[0022] As shown in Figure 2, during driving, the tool body 10 is pushed down in the driving direction with the nozzle 20b of the driver guide 22 in contact with the material to be driven W. This causes the driver guide 22 to move upward relative to the nose frame 21 against the biasing force of the compression spring 23. The upward movement of the driver guide 22 is detected by a detection means (not shown). This activates the ON operation of the switch lever, which will be described later, and the driving operation is performed. The condition for the driving operation is that the nozzle 20b is in contact with the material to be driven W and the driver guide 22 is moved upward. This prevents unintentional driving operations.

[0023] A magazine 3 is connected to the rear side of the nose frame 21 via a magazine base 2. Multiple driving tools n are loaded into the magazine 3. The multiple driving tools n are loaded in a state where they are temporarily connected in parallel at regular intervals by connecting bands. In conjunction with the driving operation of the tool body 10, the driving tools n are supplied one by one from the magazine 3 into the driving passage 20a of the driving nose section 20, extending vertically. As shown by the white arrows in Figure 1, the driving tools n are advanced one by one in a pitch toward the front. The driver guide 22 is provided with a guide member 40 for guiding the orientation of the driving tools n supplied into the driving passage 20a. Details of the guide member 40 will be described later.

[0024] A vertically elongated driver 15 is coupled to the lower surface of the piston 13. The lower part of the driver 15 enters the driving passage 20a. The driver 15 moves downward within the driving passage 20a due to the gas pressure of the accumulator chamber 14 acting on the upper surface of the piston 13. The lower end of the driver 15 strikes a single driving tool n supplied into the driving passage 20a. The struck driving tool n is ejected from the ejection port 20b. The ejected driving tool n is driven into the material W to be driven. A lower end damper 16 is positioned at the bottom of the cylinder 12 to absorb the impact at the lower moving end of the piston 13.

[0025] As shown in Figure 3, the right side of the driver 15 is provided with multiple (eight in the figure) engaging portions 15a. Each engaging portion 15a has a rack tooth shape that protrudes to the right. The multiple engaging portions 15a are arranged at regular intervals in the longitudinal direction (vertical direction) of the driver 15. The engaging portions 33a of the lift wheel 33, which is equipped with the lift mechanism 30 described later, are sequentially engaged with the multiple engaging portions 15a.

[0026] As shown in Figures 1 and 2, a grip 4 for the user to hold is provided at the rear of the tool body 10. A switch lever 5, operated by the user pulling it with their fingertips, is provided on the front lower surface of the grip 4. As described above, the operation of pulling the switch lever 5 becomes effective when the injection nozzle 20b is brought into contact with the material to be driven W and the driver guide 22 is moved relatively upward. When the switch lever 5 is pulled, the switch body 6 is turned on and the electric motor 31 of the lift mechanism 30, which will be described later, is started.

[0027] A battery mounting section 7 is provided at the rear of the grip 4. The battery pack 8 is mounted on the rear surface of the battery mounting section 7. The battery pack 8 can be attached to and detached from the battery mounting section 7 by sliding it up and down. The battery pack 8 can be reused by removing it from the battery mounting section 7 and charging it with a separately prepared charger. The battery pack 8 is versatile and can also be used as a power source for other power tools. The electric motor 31 of the lift mechanism 30 operates using the power from the battery pack 8.

[0028] A drive unit housing 9 is provided between the lower part of the battery mounting section 7 and the tool body 10. The electric motor 31 of the lift mechanism 30 is housed inside the drive unit housing 9. A lift wheel 33 is supported in front of the electric motor 31 via a reduction gear train 32.

[0029] As shown in Figure 3, the lift wheel 33 is positioned to the right of the driver 15. The lift wheel 33 is supported by the output shaft 32a of the reduction gear train 32. The lift wheel 33 has a plurality (e.g., 8) of engaging parts 33a that sequentially engage with the engaging parts 15a of the driver 15. A cylindrical shaft member (pin) is used for each engaging part 33a. The plurality of engaging parts 33a are arranged at regular intervals along the outer circumference of the lift wheel 33. A large gap in the rotational direction is provided between the first engaging part 33a and the last engaging part 33a. When this gap is directed towards the driver 15, the engagement of the lift wheel 33 with respect to the engaging parts 15a of the driver 15 is released. Figure 3 shows the standby state just before the engagement is released.

[0030] When the electric motor 31 is started, the output shaft 32a and the lift wheel 33 rotate together in the direction of arrow R shown in Figure 3 (counterclockwise in Figure 3). Figure 2 shows the state immediately after the driver 15 has reached its lower moving end and the driving tool n has been driven in. After the driver 15 reaches its lower moving end, the rotation of the lift wheel 33 in the direction of arrow R causes the engaging portion 33a to sequentially engage with the engaging portion 15a of the driver 15 from below, thereby returning the driver 15 upward. The lift mechanism 30 returns the piston 13 upward, increasing the gas pressure in the pressure accumulator chamber 14. When the driver 15 is returned to the initial position shown in Figure 1, the electric motor 31 stops and the series of driving operations ends.

[0031] When the switch lever 5 is pulled again, the lift mechanism 30 is activated. This causes the lift wheel 33 to rotate in the direction of arrow R, disengaging from the engaging portion 15a of the driver 15. As a result, the driver 15 moves downward due to the gas pressure in the accumulator chamber 14 acting on the piston 13. As the driver 15 moves downward through the driving passage 20a, the driving tool n is struck and driven into the material W to be driven.

[0032] As shown in Figure 5, the driver guide 22 is provided with a driving passage 20a through which the driver 15 passes, a relief passage 20c through which multiple engaging parts 15a pass when the driver 15 passes, and a guide member 40 that restricts the driving posture of the driving tool n. The relief passage 20c is provided along the right side of the driving passage 20a and opens into the driving passage 20a. The driver 15 reciprocates up and down within the driving passage 20a, and the multiple engaging parts 15a reciprocate up and down within the relief passage 20c. As shown in Figure 3, the relief passage 20c is provided in the region from the upper end of the driving passage 20a to approximately the center in the longitudinal direction (vertical direction).

[0033] As shown in Figures 3 and 4, the guide member 40 has a long, plate-like shape. The guide member 40 extends from approximately the center in the longitudinal direction (vertical direction) of the relief passage 20c to the lower end. The guide member 40 is provided to be movable between a closed position that blocks the relief passage 20c and an open position that opens it. Figures 4 and 5 show the state in which the guide member 40 is in the closed position. When the guide member 40 moves to the closed position, it is positioned to the right of the driving tool n supplied into the driving passage 20a. The guide member 40 in the closed position guides the driving tool n so that it does not tilt with respect to the driving direction during supply and driving.

[0034] As shown in Figures 4 and 5, an engagement surface 40d is provided at the rear of the guide member 40. The engagement surface 40d is provided in a range from the top to approximately the center in the longitudinal direction. The engagement surface 40d is provided with an inclination in a direction that causes it to displace rearward as it goes downward. When the driver 15 moves downward, the multiple engagement parts 15a are pressed against the engagement surface 40d from above, causing the guide member 40 to be displaced from a closed position at the rear where it enters the relief passage 20c by the downward movement of the driver 15 to an open position at the front where it opens the relief passage 20c.

[0035] The guide member 40 has an L-shaped hook portion 40a that bends upstream in the driving direction. The hook portion 40a is engaged with an engagement portion 22b provided on the driver guide 22. This restricts the displacement of the hook portion 40a toward the driving passage 20a. The guide member 40 is rotatable back and forth using the engagement portion of the hook portion 40a with respect to the engagement portion 22b as a pivot point.

[0036] The guide member 40 has a movable guide 40b on the downstream side in the driving direction. The movable guide 40b is provided so as to protrude forward. The movable guide 40b is provided with a support hole 40c in the shape of a groove that is long in the front-rear direction. A single support shaft 24 is inserted through the support hole 40c. The support shaft 24 is immovably supported by the driver guide 22. The movable guide 40b having the support hole 40c and the support shaft 24 supports the downstream side of the guide member 40 in the driving direction so as to be displaceable in the front-rear direction. The support shaft 24 has an appropriate clearance with respect to the support hole 40c to allow the guide member 40 to slide and rotate in the front-rear direction.

[0037] A biasing member 25 is interposed between the guide member 40 and the base portion 22c of the driver guide 22. A compression spring is used for the biasing member 25. The biasing member 25 biases the guide member 40 toward the closed position. As a result, the guide member 40 moves to the open position against the biasing force of the biasing member 25. The guide member 40 is returned to the closed position by the biasing force of the biasing member 25.

[0038] The biasing member 25 is positioned between the upper hook portion 40a and the lower movement guide 40b, slightly above the approximate midpoint in the longitudinal direction. Therefore, the biasing force of the biasing member 25 acts more strongly on the side that engages the hook portion 40a with the engagement portion 22b. As a result, the movement of the guide member 40 toward the open position, which is made by the engagement from above by the engagement portion 15a of the driver 15, is allowed to be a complex movement that combines a forward parallel movement with a rotational movement that displaces the lower side (movement guide 40b side) forward around the upper side (hook portion 40a side). This allows the guide member 40 to move more smoothly toward the open position.

[0039] As shown in Figure 4, a cushion member 26 is provided on the rear surface of the base portion 22c of the driver guide 22. For example, a rectangular parallelepiped-shaped urethane rubber is used for the cushion member 26. The cushion member 26 absorbs the impact when the guide member 40 is pushed forward by the engaging portion 15a of the driver 15, exceeding the shock absorption capacity of the biasing member 25.

[0040] The vertical position of the guide member 40 is appropriately set. The driving tool n supplied to the driving passage 20a is positioned to the left of the guide member 40. This ensures that the driving tool n is guided in a way that prevents any displacement of its head to the right (into the relief passage 20c). The guide member 40 extends over a long area from above to below the head of the driving tool n. This ensures a stable driving posture by shielding a large area of ​​the driving tool n in the longitudinal direction from the relief passage 20c side with the guide member 40.

[0041] Figure 3 shows a state where the tip of the driving tool n extends even further below the lower end of the relief passage 20c. Therefore, the tip of the driving tool n is guided into the driving passage 20a from the beginning of driving. In contrast, if the driving tool n is a short driving tool, for example, about 20 mm in length, it is expected that the tip will be located above the lower end of the relief passage 20c. Even in this case, an area extending almost the entire length of the driving tool n is shielded from the relief passage 20c side by the guide member 40. This restricts the positional displacement of the driving tool n into the relief passage 20c. Furthermore, the driving posture of the driving tool n is reliably stabilized.

[0042] As shown in Figures 5 and 6, the driving tool n is struck by the driver 15 and moves downward within the driving passage 20a while the guide member 40 restricts its displacement into the relief passage 20c. As shown in Figure 7, as the driver 15 moves downward, the lowest engaging portion 15a engages with the engaging surface 40d of the guide member 40. This causes the guide member 40 to be displaced towards the open position by a combined rotational and sliding motion. This opens the relief passage 20c, allowing multiple engaging portions 15a to move downward within the relief passage 20c.

[0043] As shown in Figure 3, the guide member 40 extends beyond the lower moving end position of the multiple engaging portions 15a of the driver 15 (the lower end of the relief passage 20c) to the downstream side in the driving direction. As a result, the downstream side of the relief passage 20c is blocked by the guide member 40, which more reliably stabilizes the driving posture of the short driving tool n in particular.

[0044] According to the embodiment described above, the driving tool 1 has a guide member 40 that can move between a closed position that blocks the relief passage 20c for the driver 15 to pass through and an open position that opens it. Therefore, when the guide member 40 is in the closed position and the relief passage 20c is blocked by the guide member 40, the driving posture of the driving tool n within the driving passage 20a is stabilized. When the driver 15 moves downward, the guide member 40 is pushed by the multiple engagement parts 15a and moves to the open position, allowing the multiple engagement parts 15a to move within the relief passage 20c.

[0045] According to the embodiment, the guide member 40 is pushed by the engaging portion 15a when the driver 15 moves, moving from the closed position to the open position. Therefore, the guide member 40 moves from the closed position to the open position due to the movement of the driver 15. As a result, no special means are required to move the guide member 40.

[0046] According to the embodiment, the guide member moves between a closed position and an open position by a combined motion of sliding in the front-rear direction and rotational motion pivoted at its upper side. This allows the guide member 40 to be moved with a simple support structure.

[0047] According to the embodiment, the guide member 40 is supported so as to be rotatable in the front-rear direction with the upstream side in the driving direction as the pivot point. Furthermore, the downstream side of the guide member 40 in the driving direction is guided so as to be slidable in the front-rear direction by the movable guide 40b. Therefore, the rotational movement of the guide member 40 is stabilized.

[0048] In one embodiment, the guide member 40 is biased to the closed position by the biasing member 25. Therefore, the relief passage 20c is held closed by the guide member 40 by the biasing member 25. The movement of the guide member 40 to the open position is performed against the biasing member 25.

[0049] According to the embodiment, the driving tool 1 has a cushion member 26 that comes into contact with the guide member 40 when it moves from the closed position to the open position. Therefore, the impact when the guide member 40 moves to the open position is absorbed by the cushion member 26.

[0050] According to the embodiment, the guide member 40 extends beyond the movement area of ​​the multiple engagement portions 15a of the driver 15, downstream in the driving direction. Therefore, the guide member extends over a long area in the driving direction. This ensures more reliable stabilization of the driving position of the driving tool.

[0051] According to the embodiment, the guide member 40 is positioned along the driving tool n supplied to the driving passage 20a. Furthermore, if the driving tool n is a short driving tool of, for example, about 20 mm in length, the guide member extends downstream of the driving tool n in the driving direction. Therefore, the supply position of the driving tool n at the supply position is stabilized, as is the driving position.

[0052] According to the embodiment, the guide member 40 is movable in a front-to-back direction perpendicular to the direction in which the engaging portion 15a protrudes from the driver 15 (to the right). Therefore, when the engaging portion 15a of the driver 15 rides onto the engaging surface 40d, the guide member 40 is pushed and moves to the open position. This allows the guide member 40 to be positioned compactly relative to the driver 15, thereby making the driving nose portion 20 more compact in the left-to-right direction.

[0053] According to the embodiment, the direction of movement of the guide member 40 from the closed position to the open position coincides with the direction of supply of the driving tool n to the driving passage 20a. Therefore, the driving nose portion 20 can be made more compact in the direction perpendicular to the direction of movement of the guide member 40 (left and right direction).

[0054] Further modifications can be made to the embodiments described above. For example, although a guide member 40 capable of a combined rotational movement and sliding movement (translational movement) in the front-rear direction was given as an example, the movement of the guide member may be configured to move between the shielded position and the open position using only one of the rotational or sliding movements. The rotational movement of the guide member may also be changed to a configuration in which the downstream side in the driving direction is used as the pivot point.

[0055] Although the guide member 40 is shown as moving in a forward-backward direction perpendicular to the direction in which the engaging portion 15a protrudes from the driver 15, the direction of movement of the guide member may be changed to a direction parallel to the direction in which the engaging portion 15a protrudes.

[0056] While the example given shows the guide member 40 extending from near the center of the relief passage 20c to its lower end in the vertical direction, it may also extend further from the upstream side in the driving direction.

[0057] The driving tool 1 in the embodiment is an example of a driving tool in one aspect of the present disclosure. The piston 13 in the embodiment is an example of a piston in one aspect of the present disclosure. The driving tool n in the embodiment is an example of a driving tool in one aspect of the present disclosure. The driver 15 in the embodiment is an example of a driver in one aspect of the present disclosure. The engaging portion 15a in the embodiment is an example of an engaging portion in one aspect of the present disclosure. The lift wheel 33 in the embodiment is an example of a lifter in one aspect of the present disclosure.

[0058] The driving passage 20a in the embodiment is an example of a driving passage in one aspect of the present disclosure. The relief passage 20c in the embodiment is an example of a relief passage in one aspect of the present disclosure. The guide member 40 in the embodiment is an example of a guide member in one aspect of the present disclosure. [Explanation of Symbols]

[0059] W... material to be driven in n... driving tool 1… Driving tool 2… Magazine base 3… Magazine 4…Grip 5…Switch lever 6…Switch console 7…Battery mounting section 8…Battery pack 9…Drive unit housing 10...Tool body 11…Main housing 12... Cylinder 13... Piston 14...Accumulation chamber 15…Driver 15a...Engagement part 16... Lower end damper 20... Nose section 20a...Injection passage, 20b...Exjection port, 20c...Relief passage, 20d...All-around guide section 21…Nose frame 21a... Spring retainer 22... Driver Guide 22a...spring receiving part, 22b...engaging part, 22c...base part 23... Compression spring 24…Spindle 25… Biasing member 26…Cushioning material 30…Lift mechanism 31… Electric motor 32…Reduction gear train 32a... Output shaft 33…Lift Wheel 33a...Engagement part R...Rotation direction of the lift wheel 33 40… Guide component 40a...hooking part, 40b...moving guide, 40c...support hole, 40d...engaging surface

Claims

1. It is a driving tool, A piston that moves by gas pressure, A driver provided on the piston and moving integrally with the piston to strike the driving tool, Multiple engaging parts provided on the driver along the direction of movement of the driver, A lifter that sequentially engages with the plurality of engagement parts to return the driver to its initial position, The driving passage through which the driving tool is supplied and through which the driver passes, A relief passage is provided which opens into the aforementioned driving passage and allows the plurality of engaging parts to pass through when the driver passes through, The system includes a guide member that can move between a closed position that blocks the aforementioned relief passage and an open position that opens it. The guide member is a driving tool that engages with the engaging portion when the driver moves and moves from the closed position to the open position.

2. The driving tool according to claim 1, The guide member is a driving tool that rotates to move between the closed position and the open position.

3. A driving tool according to claim 1 or 2, The guide member has a pivot point on the upstream side in the driving direction, A driving tool in which the downstream side of the guide member in the driving direction is guided by a movable guide.

4. A driving tool according to claim 1 or 2, A driving tool having a biasing member that biases the guide member to the closed position.

5. A driving tool according to claim 1 or 2, A driving tool having a cushioning member that contacts the guide member when it moves from the closed position to the open position.

6. A driving tool according to claim 1 or 2, The guide member is a driving tool that extends beyond the moving region in the driving direction from the moving region of the plurality of engaging portions to the downstream side.

7. A driving tool according to claim 1 or 2, The guide member is a driving tool that extends along the driving tool supplied to the driving passage and further downstream in the driving direction than the driving tool.

8. A driving tool according to claim 1 or 2, The guide member is a driving tool that is movable in a direction perpendicular to the direction in which the engaging portion protrudes from the driver.

9. A driving tool according to claim 1 or 2, A driving tool in which the direction of movement of the guide member from the closed position to the open position coincides with the direction of supply of the driving tool to the driving passage.

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