Fastening tool

Abstract

The present application provides a fastening tool capable of easily controlling the movement amount of a screwdriver bit in the direction of fastening a screw. The fastening tool is provided with: a holding member to which a screwdriver bit is attached in a detachable manner, which moves in the axial direction of the screwdriver bit along the extension direction of a rotation guide member inside the rotation guide member and rotates together with the rotation guide member; a first moving member linked to the holding member via a linking member, which rotates together with the holding member and the rotation guide member and moves in the axial direction along the rotation guide member; a second moving member which rotatably supports the first moving member and moves in the axial direction along the rotation guide member; a pulley which is rotated by a bit moving motor; and a wire which links the pulley and the second moving member, the wire extending in a direction parallel to the extension direction of the rotation guide member.

Description

Technical Field

[0001] This invention relates to a fastening tool that engages a screwdriver head with a screw, presses the screw with the screwdriver head and presses it against the object to be fastened, causing the screwdriver head to rotate and screw in. Background Technology

[0002] A known tool, called a portable driver, is a tool that uses the air pressure of compressed air supplied from an air compressor or the combustion pressure of a gas to sequentially eject fasteners loaded in a nail cartridge from the front end of a driver guide.

[0003] As a tool for rotating the screwdriver head to tighten the screw and moving the screwdriver head in the direction of tightening the screw, conventionally, pneumatic screwdrivers have been proposed that use a pneumatic motor to rotate the screwdriver head and use air pressure to move the screwdriver head in the direction of tightening the screw (for example, see Patent Document 1).

[0004] Tools that utilize air pressure do not have electric motors or the like, therefore they do not require a baseboard containing electronic components such as control circuits. On the other hand, they require a connecting air hose, which degrades their handling capabilities.

[0005] In response, a screwdriver has been proposed that uses the driving force of an electric motor that rotates the screw to compress the spring and uses the force of the spring to drive the screw in (for example, see Patent Document 2).

[0006] Existing technical documents

[0007] Patent Document 1: Japanese Patent No. 5262461

[0008] Patent Document 2: Japanese Patent No. 6197547 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] Screwdrivers that use air pressure or spring force to drive in screws both have difficulty controlling the amount of movement of the screwdriver bit in the direction of tightening the screw.

[0011] Furthermore, in electric screwdrivers used with a hand-held handle, a structure has been proposed in which a battery is installed at the bottom of the handle and a base plate is placed between the handle and the battery. However, with such a structure, the size of the tool along the extension direction of the handle increases.

[0012] The present invention was developed to address this problem, and its purpose is to provide a fastening tool that allows for easy control of the amount of movement of the screwdriver bit in the direction of tightening the screw.

[0013] In addition, the present invention aims to provide a fastening tool that inhibits the expansion of the tool's dimensions along the extension direction of the handle.

[0014] Technical solutions for solving the problem

[0015] To address the aforementioned issues, the present invention provides a fastening tool comprising: a cylindrical rotating guide member extending in one direction and supported by a bearing for rotation; a retaining member having an opening for inserting a screwdriver bit in a detachable manner, and moving axially within the rotating guide member along its extension direction, and rotating together with the rotating guide member; a moving member that moves the retaining member along the rotating guide member in a front-rear direction; a rotating member driven by an electric motor; and a transmission member connected to the moving member and having flexibility that allows it to be wound along the outer periphery of the rotating member. The rotating member is rotated by the electric motor, thereby causing the moving member to move in one direction, using the transmission member, to press a screw engaged with a screwdriver bit toward the object to be fastened.

[0016] In this invention, the amount of rotation of the electric motor is controlled to control the amount of movement of the screwdriver bit in one direction when pressing the screw engaged with the screwdriver bit against the object to be fastened.

[0017] In addition, the present invention comprises: a tool body extending in one direction; a handle extending in another direction intersecting the extension direction of the tool body; a storage portion disposed on one side of the handle along the extension direction of the tool body and storing consumables; and a substrate storage portion disposed on the side of the storage portion facing the handle and storing the substrate.

[0018] In this invention, a substrate storage part is provided on the back side of the storage part by utilizing the space between the storage part and the handle.

[0019] Invention Effects

[0020] In this invention, the amount of movement of the screwdriver bit in one direction of tightening the screw can be controlled by controlling the rotation of the motor, and the amount of movement of the screwdriver bit is easy to control.

[0021] Furthermore, in this invention, by providing a substrate storage portion on the back side of the storage portion, it is possible to suppress the dimensional expansion of the fastening tool along the extension direction of the handle. Attached Figure Description

[0022] Figure 1A This is a side sectional view showing an example of the internal structure of the fastening tool of this embodiment.

[0023] Figure 1B This is a top sectional view showing an example of the internal structure of the fastening tool of this embodiment.

[0024] Figure 1C This is a front sectional view showing an example of the internal structure of the fastening tool of this embodiment.

[0025] Figure 2A This is an exploded perspective view showing an example of the internal structure of the fastening tool according to this embodiment.

[0026] Figure 2B This is a perspective view showing an example of the fastening tool of this embodiment.

[0027] Figure 3A This is a perspective view showing an example of the main structure of the fastening tool according to this embodiment.

[0028] Figure 3B This is a perspective view showing an example of the main structure of the fastening tool according to this embodiment.

[0029] Figure 4A This is a cross-sectional perspective view showing an example of the main structural components of the fastening tool according to this embodiment.

[0030] Figure 4B This is a cross-sectional perspective view showing an example of the main structural components of the fastening tool according to this embodiment.

[0031] Figure 4C This is a cross-sectional perspective view showing an example of the main structural components of the fastening tool according to this embodiment.

[0032] Figure 5 This is a top sectional view showing an example of the main structural components of the fastening tool according to this embodiment.

[0033] Figure 6A This is a top sectional view showing an example of the internal structure of the fastening tool of this embodiment.

[0034] Figure 6B This is a top sectional view showing an example of the internal structure of the fastening tool of this embodiment.

[0035] Figure 7A This is a cross-sectional view showing an example of a disassembly and assembly retention mechanism.

[0036] Figure 7B This is a cross-sectional view showing an example of a disassembly and assembly retention mechanism.

[0037] Figure 8A This is a perspective view showing an example of a disassembly and assembly retention mechanism.

[0038] Figure 8B This is a perspective view showing an example of a disassembly and assembly retention mechanism.

[0039] Figure 9This is a perspective view showing an example of the screw delivery unit and the machine head of this embodiment.

[0040] Figure 10A This is a perspective view taken from the rear, showing an example of the fastening tool of this embodiment.

[0041] Figure 10B This is a perspective view taken from the rear, showing an example of the fastening tool of this embodiment.

[0042] Figure 10C This is a perspective view taken from the rear, showing an example of the fastening tool of this embodiment.

[0043] Figure 11 This is a three-dimensional diagram representing an example of a design department.

[0044] Figure 12A This is a side sectional view illustrating an example of the operation of the fastening tool in this embodiment.

[0045] Figure 12B This is a top sectional view showing an example of the operation of the fastening tool in this embodiment.

[0046] Figure 13A It is a cross-sectional view showing the tightened state of the screw.

[0047] Figure 13B It is a cross-sectional view showing the tightened state of the screw.

[0048] Figure 13C It is a cross-sectional view showing the tightened state of the screw. Detailed Implementation

[0049] Hereinafter, embodiments of the fastening tool of the present invention will be described with reference to the accompanying drawings.

[0050] <Example of the structure of the fastening tool in this embodiment>

[0051] Figure 1A This is a side sectional view showing an example of the internal structure of the fastening tool according to this embodiment. Figure 1B This is a top sectional view showing an example of the internal structure of the fastening tool according to this embodiment. Figure 1C This is a front sectional view showing an example of the internal structure of the fastening tool according to this embodiment. Additionally, Figure 2A This is an exploded perspective view showing an example of the internal structure of the fastening tool according to this embodiment. Figure 2B This is a perspective view showing an example of the fastening tool of this embodiment.

[0052] The fastening tool 1 of this embodiment includes: a bit holding part 3 for holding a screwdriver bit 2 in a rotatable and axially movable manner; a first drive part 4 for rotating the screwdriver bit 2 held by the bit holding part 3; and a second drive part 5 for moving the screwdriver bit 2 held by the bit holding part 3 axially.

[0053] In addition, the fastening tool 1 includes: a screw storage section 6 for storing screws 200; a screw delivery section 7 for delivering the screws stored in the screw storage section 6; and a head 8 for pressing against the object being fastened by the screws 200 and for ejecting the screws.

[0054] Furthermore, the fastening tool 1 includes a tool body 10 and a handle 11. In addition, the fastening tool 1 has a battery mounting part 13 at the end of the handle 11 for the battery 12 to be installed in a detachable manner.

[0055] The tool body 10 of the fastening tool 1 extends in one direction along the axial direction of the screwdriver bit 2, as indicated by arrows A1 and A2, while the handle 11 extends in another direction intersecting the extension direction of the tool body 10. The fastening tool 1 sets the extension direction of the tool body 10, i.e., the axial direction of the screwdriver bit 2 as indicated by arrows A1 and A2, as the front-to-back direction. Furthermore, the fastening tool 1 sets the extension direction of the handle 11 as the up-down direction. Additionally, the fastening tool 1 sets the direction orthogonal to the extension directions of the tool body 10 and the handle 11 as the left-to-right direction.

[0056] The first drive unit 4 is located on one side of the tool body 10, i.e., at the rear, across the handle 11. The second drive unit 5 is located on the other side of the tool body 10, i.e., at the front, across the handle 11.

[0057] The screw storage section 6 uses a connecting strap to connect multiple screws 200 and store the connecting screws that are spirally wound.

[0058] Figure 3A , Figure 3B This is a perspective view showing an example of the main structural components of the fastening tool according to this embodiment. Figures 4A to 4C This is a cross-sectional perspective view showing an example of the main structural components of the fastening tool according to this embodiment. Figure 5 This is a top sectional view showing an example of the main structure of the fastening tool according to this embodiment, illustrating details of the bit holding part 3 and the first drive part 4. Next, the bit holding part 3 and the first drive part 4 will be described with reference to the figures.

[0059] The screwdriver bit holder 3 includes: a holding member 30 for holding the screwdriver bit 2 in a detachable manner; a rotation guide member 31 for supporting the holding member 30 so as to be movable in the front-back direction along the axis of the screwdriver bit 2 as indicated by arrows A1 and A2, and rotating together with the holding member 30; a moving member 32 for moving the holding member 30 in the front-back direction along the rotation guide member 31; and a force applying member 33 for applying force to the moving member 32 in the rearward direction as indicated by arrow A2.

[0060] The retaining member 30 is composed of, for example, a cylindrical component whose outer diameter is slightly smaller than the inner diameter of the rotating guide member 31 and which enters the inner side of the rotating guide member 31. The retaining member 30 has an opening 30a at its front end along the axial direction of the screwdriver bit 2, the opening of which is shaped to match the cross-sectional shape of the screwdriver bit 2. The retaining member 30 has a detachable retaining mechanism 30c at the opening 30a for detachably retaining the screwdriver bit 2. The opening 30a of the retaining member 30 protrudes inside the rotating guide member 31, and the screwdriver bit 2 is detachably inserted into the opening 30a.

[0061] The rotary guide member 31 extends along the extension direction of the tool body 10, that is, along the axial direction of the screwdriver bit 2 in the front-to-back direction indicated by arrows A1 and A2. The rotary guide member 31 is cylindrical in shape, holding the member 30 inside, and its front end is rotatably supported by a bearing 34a, which serves as an example of a bearing, on a metal front frame 10b provided on the front side of the resin housing 10a that constitutes the outer casing of the tool body 10. In addition, the rear end of the rotary guide member 31 is connected to the first drive unit 4.

[0062] The rotary guide member 31 is formed in two radially opposing portions of the screwdriver bit 2 in a groove 31a extending in the front-back direction as indicated by arrows A1 and A2. The rotary guide member 31 is connected to the retaining member 30 via the connecting member 30b, which enters the groove 31a through the retaining member 30 radially and protrudes from both sides of the retaining member 30.

[0063] The retaining component 30 has a through hole perpendicular to the rotation direction of the screwdriver bit 2. The connecting component 30b is inserted into this hole and secured by a pin 30f. The connecting component 30b is a cylindrical component with an elongated oval cross-section.

[0064] The elongated direction of the connecting member 30b is aligned with the extension direction of the groove 31a, which is parallel to the axis of the screwdriver bit 2, as indicated by arrows A1 and A2. The width direction of the elongated shape is aligned with the extension direction of the groove 31a, as indicated by arrows B1 and B2, that is, along the rotation direction of the rotation guide member 31. Furthermore, the connecting member 30b is configured such that the width of the shorter side of the elongated shape, i.e., the width along the rotation direction of the rotation guide member 31, is slightly smaller than the width of the groove 31a along that direction.

[0065] Thus, the connecting member 30b entering the groove 31a is supported in the groove 31a in a manner that allows it to move axially along the rotation guide member 31. Furthermore, the movement of the connecting member 30b relative to the rotation guide member 31 in the rotational direction is restricted between one side and the other side of the groove 31a in the direction extending along the groove 31a. Therefore, the connecting member 30b, through the rotation of the rotation guide member 31, is pressed by one side or the other side of the groove 31a according to the rotational direction of the rotation guide member 31, and receives a circumferential force from the rotation guide member 31 in the rotational direction.

[0066] Therefore, when the rotary guide member 31 rotates, the connecting member 30b is pressed by the groove 31a of the rotary guide member 31, thereby keeping member 30 rotating together with the rotary guide member 31. In addition, the connecting member 30b of the retaining member 30 is guided by the groove 31a of the rotary guide member 31 and moves in the front-back direction along the axial direction of the screwdriver bit 2.

[0067] The moving member 32 is an example of a transmission member, comprising: a first moving member 32a that rotates together with the holding member 30, causing the holding member 30 to move in the front-back direction along the rotation guide member 31; a second moving member 32c that is supported on the first moving member 32a via a bearing 32b and presses the first moving member 32a via the bearing 32b; and a buffer member 32d that is mounted on the rear side of the second moving member 32c.

[0068] The first moving member 32a is composed of a cylindrical member, for example, with an inner diameter slightly larger than the outer diameter of the rotary guide member 31 and extending into the outer side of the rotary guide member 31. The first moving member 32a is connected to the retaining member 30 via a connecting member 30b protruding from the groove 31a of the rotary guide member 31, thereby being supported in a manner that allows it to move along the axial direction of the rotary guide member 31.

[0069] Bearing 32b is an example of a bearing, inserted between the outer periphery of the first moving member 32a and the inner periphery of the second moving member 32c. The first moving member 32a constitutes an inner ring retaining member for retaining the inner ring of bearing 32b, and the second moving member 32c constitutes an outer ring retaining member for retaining the outer ring of bearing 32b. The inner ring of bearing 32b is supported on the outer periphery of the first moving member 32a in a manner that prevents it from moving in the rotational direction and axial direction, and the outer ring is supported on the inner periphery of the second moving member 32c in a manner that prevents it from moving in the rotational direction and axial direction.

[0070] Thus, the second moving member 32c is connected to the first moving member 32a via the bearing 32b, with its movement restricted in the forward and backward direction along the axial direction. Furthermore, the second moving member 32c supports the first moving member 32a in a rotatable manner via the bearing 32b.

[0071] Therefore, the first moving member 32a is pressed by the second moving member 32c via the bearing 32b as the second moving member 32c moves in the forward-backward direction along the axial direction. Additionally, the first moving member 32a is rotatable relative to the second moving member 32c, while the second moving member 32c does not rotate relative to the rotation guide member 31.

[0072] In this example, the force-applying component 33 is composed of a helical spring, located outside the rotation guide component 31, between the front frame 10b, which is disposed on the front side of the housing 10a of the tool body 10, and the second moving component 32c of the moving component 32, and abuts against the spring seat 32f, which is arranged to contact the end face of the outer ring of the bearing 32b. As the moving component 32 moves in the forward direction indicated by arrow A1, the force-applying component 33 is compressed, thereby applying a force to the moving component 32 in the rearward direction indicated by arrow A2.

[0073] The first drive unit 4 includes a bit rotating motor 40 and a reducer 41, both driven by electricity supplied from the battery 12. The bit rotating motor 40 is an example of a first motor; its shaft 40a is connected to the reducer 41, and the reducer 41's shaft 41a is connected to the rotation guide member 31. The first drive unit 4 utilizes a planetary gear structure for the reducer 41. The bit rotating motor 40, the rotation guide member 31, the holding member 30, and the screwdriver bit 2 held by the holding member 30 are arranged coaxially.

[0074] The first drive unit 4 has a bit rotation motor 40 and a reducer 41 mounted on a metal rear frame 10c located at the rear of the housing 10a of the tool body 10. The shaft 41a of the reducer 41 is supported on the rear frame 10c via a bearing 42. The rear end of the rotation guide member 31 is connected to the shaft 41a of the reducer 41, which is supported on the rear frame 10c via a bearing 42, thus enabling it to rotate.

[0075] The bit holding part 3 and the first drive part 4 are assembled into one unit by connecting the front frame 10b and the rear frame 10c via a connecting member 10d extending in the front-rear direction. The front frame 10b is fixed to the housing 10a of the tool body 10 by screws 10e.

[0076] Furthermore, the front end of the rotating guide member 31 of the bit holder 3 is supported by a bearing 34a on a front frame 10b fixed to the front of the housing 10a of the tool body 10, and the rear end of the rotating guide member 31 is supported by a shaft 41a of the reducer 41 and a bearing 42 on a rear frame 10c fixed to the rear of the housing 10a. Thus, the rotating guide member 31 of the bit holder 3 is rotatably supported on the tool body 10.

[0077] Thus, the first drive unit 4 rotates the rotation guide member 31 via the bit rotation motor 40. When the rotation guide member 31 rotates, the connecting member 30b is pressed by the groove 31a of the rotation guide member 31, thereby keeping the retaining member 30 of the screwdriver bit 2 rotating together with the rotation guide member 31.

[0078] The bit holding part 3 is provided with a guide member 32g in the second moving part 32c. The connecting part 10d is provided with a pair of guide wall parts 10g separated by a gap slightly larger than the diameter of the guide member 32g. The guide member 32g enters the diameter of the pair of guide wall parts 10g, so that the pair of guide wall parts 10g face the circumferential surface of the guide member 32g.

[0079] Thus, guided by the connecting member 10d via the guide member 32g, the second moving member 32c is able to move in the forward and backward directions along the axis of the screwdriver bit 2 as indicated by arrows A1 and A2, and its rotation following the rotation of the rotating guide member 31 is restricted.

[0080] Figure 6A and Figure 6B This is a top sectional view showing an example of the internal structure of the fastening tool according to this embodiment, illustrating the details of the second drive unit 5. Next, the second drive unit 5 will be described with reference to the figures.

[0081] The second drive unit 5 includes a bit-moving motor 50 and a reducer 51, both driven by electricity supplied from the battery 12. The bit-moving motor 50 is an example of an electric motor, specifically a second electric motor. The shaft 50a of the bit-moving motor 50 is connected to the reducer 51, and the shaft 51a of the reducer 51 is connected to a pulley 52, which is an example of a rotating component. The pulley 52 of the second drive unit 5 is supported on the tool body 10 via a bearing 53. The shaft 50a of the bit-moving motor 50 of the second drive unit 5 is arranged along the extending direction of the handle 11.

[0082] In the second drive unit 5, one end of a linear wire 54, serving as a transmission member, is connected to a pulley 52. ​​As the pulley 52 rotates, the wire 54 is wound along the outer periphery 52a of the pulley 52. ​​The other end of the wire 54 is connected to a wire connection portion 32h provided in the second moving member 32c of the moving member 32. The transmission member can be flexible enough to be wound along the outer periphery of rotating members such as the pulley 52, and can be made of a rope made of fibers, a belt made of rubber, or a chain made of metal, as long as it is capable of being wound along the outer periphery of rotating members such as the pulley 52. ​​When the transmission member is a chain, the rotating member can also be a sprocket with teeth.

[0083] Therefore, the second drive unit 5 rotates the pulley 52 via the bit movement motor 50 to wind the wire 54, thereby moving the second moving member 32c in the forward direction indicated by arrow A1. The bit holding unit 3 moves forward via the second moving member 32c and presses the first moving member 32a via the bearing 32b, causing the first moving member 32a and the second moving member 32c to move together in the forward direction along the axial direction. As the first moving member 32a moves forward, the holding member 30, which is connected to the first moving member 32a via the connecting member 30b, moves forward, and the screwdriver bit 2 held by the holding member 30 moves in the forward direction indicated by arrow A1.

[0084] The second drive unit 5 is offset to one side relative to the approximate center in the left-right direction of the fastening tool 1, so that the tangential direction of the portion of the pulley 52 where the wire 54 is wound is along the extending direction of the rotation guide member 31. That is, the center of the pulley 52, which in this example is the shaft 50a of the bit movement motor 50, is offset to one side relative to the rotation guide member 31, and when viewed from the axial direction of the pulley 52, the outer periphery 52a of the wire 54 wound in the pulley 52 overlaps with the rotation guide member 31.

[0085] Additionally, the wire 54 between the pulley 52 and the second moving part 32c, such as Figure 6A , Figure 6B As shown, the pulley 52 is parallel to the axial direction of the rotary guide member 31 in the radial direction and as shown. Figure 1AAs shown, the pulley 52 and the like are arranged in such a way that the axial direction of the bit moving motor 50, which is radially orthogonal to the pulley 52, is also parallel to the axial direction of the rotation guide member 31.

[0086] Furthermore, when the wire 54 is wound in overlapping layers around the pulley 52, the distance from the center of the pulley 52 to the wire 54 varies depending on the number of turns, so the amount of movement of the screwdriver bit 2 when the pulley 52 rotates one revolution will vary. In addition, the angle between the direction in which the wire 54 extends between the pulley 52 and the second moving member 32c and the direction of movement of the screwdriver bit 2 along the axial direction of the rotation guide member 31 will vary.

[0087] Therefore, by moving the movable part 32 from one end to the other within a movable range along one direction, the diameter of the pulley 52 is set in such a way that the rotation amount α of the pulley 52 required to move the screwdriver bit 2 by a predetermined amount is less than 360°.

[0088] Therefore, in order to move the screwdriver bit 2 by a predetermined amount, during the action of the pulley 52 winding the wire 54, such as Figure 6B As shown, the wire 54 is wound around the pulley 52 without overlapping, which can suppress inaccurate movement of the screwdriver bit 2. In addition, changes in the parallelism between the direction in which the wire 54 extends between the pulley 52 and the second moving member 32c and the direction of movement of the screwdriver bit 2 along the axial direction of the rotation guide member 31 are suppressed.

[0089] Therefore, the relationship between the rotation amount of the bit movement motor 50 and the movement amount of the holding member 30 is 1:1 throughout the entire movable range of the holding member 30, and the movement amount of the holding member 30 along the axial direction of the rotation guide member 31 can be controlled by controlling the rotation amount of the bit movement motor 50. That is, the movement amount of the screwdriver bit 2 mounted on the holding member 30 can be controlled by controlling the rotation amount of the bit movement motor 50.

[0090] Furthermore, regardless of the amount of wire 54 wound, the tension applied to the wire 54 is always parallel to the direction of movement of the screwdriver bit 2 along the axial direction of the rotation guide member 31, which can suppress the movement of the screwdriver bit 2 and the decrease in the transmission efficiency of the force used to press the screw 200 via the screwdriver bit 2.

[0091] Therefore, the wire 54 between the pulley 52 and the second moving member 32c extends in a straight line along the moving direction of the moving member 32, which can suppress the increase of load when the wire 54 is wound by the pulley 52 and the increase of load when the wire 54 is pulled out from the pulley 52.

[0092] Furthermore, because the wire 54 is flexible enough to be wound around the pulley 52, it is impossible to press down on the second moving member 32c to move the moving member 32 backward. Therefore, a force-applying member 33 is provided. When the moving member 32 moves forward in the direction indicated by arrow A1, the force-applying member 33 is compressed and applies a force to the moving member 32, pressing it backward in the direction indicated by arrow A2. Thus, in a structure where the screwdriver bit 2 is advanced by winding the wire 54 around the pulley 52, the advanced screwdriver bit 2 can be retracted.

[0093] In addition, the retaining member 30 that holds the screwdriver bit 2 is supported so that it can move in the front-back direction relative to the rotating guide member 31 and rotate together with the rotating guide member 31 by engaging the connecting member 30b provided in the retaining member 30 with the slot 31a provided in the rotating guide member 31.

[0094] Therefore, by configuring the bit rotation motor 40, the rotation guide member 31, the holding member 30, and the screwdriver bit 2 held in the holding member 30 on the same axis, it is possible to achieve a structure in which the screwdriver bit 2 can be rotated and moved in the front-back direction without moving the bit rotation motor 40 in the front-back direction.

[0095] In addition, in a structure in which the bit rotary motor 40 and the screwdriver bit 2 are arranged on the same axis, it is conceivable that a structure can be constructed by using a delivery screw to convert the rotational motion of the bit rotary motor 40 into the forward and backward movement of the screwdriver bit 2.

[0096] However, in the structure that utilizes the conveying screw, it is not possible to obtain a large amount of forward movement of the screwdriver bit 2 per revolution of the motor. Therefore, even if the rotational speed of the motor is increased, it is difficult to speed up the movement of the screwdriver bit 2.

[0097] In fastening tool 1, in order to shorten the time until the screw 200 is pressed against the object to be fastened using screwdriver bit 2, it is necessary to speed up the movement of screwdriver bit 2. However, in the structure that uses a conveyor screw, it is difficult to shorten the time until the screw 200 is pressed against the object to be fastened using screwdriver bit 2.

[0098] In contrast, in a structure where the holding member 30 holding the screwdriver bit 2 is supported so that it can move in the front-to-back direction relative to the rotation guide member 31, and the second drive unit 5 rotates the pulley 52 to wind the wire 54, causing the holding member 30 to move in the forward direction, the moving speed of the screwdriver bit 2 can be increased according to the rotational speed of the bit moving motor 50. This shortens the time required to press the screw 200 onto the object being fastened using the screwdriver bit 2.

[0099] Figure 7A , Figure 7BThis is a cross-sectional view showing an example of a disassembly and assembly retention mechanism. Figure 8A , Figure 8B This is a perspective view showing an example of a disassembly and assembly retention mechanism, illustrating the details of the disassembly and assembly retention mechanism 30c. The disassembly and assembly retention mechanism 30c will now be explained with reference to the figures.

[0100] The disassembly and assembly retaining mechanism 30c includes a ball 30d protruding from the opening 30a and a spring 30e that presses the ball 30d toward the direction protruding from the opening 30a. The spring 30e is an example of a pressing component, which is composed of a force-applying component such as a leaf spring or a coil spring, and an elastic component such as rubber. In this example, it is composed of a ring-shaped leaf spring and is embedded in the outer periphery of the retaining component 30.

[0101] When the insertion part 20 of the screwdriver bit 2 is inserted into the opening 30a of the retaining member 30, in the disassembly and assembly retaining mechanism 30c, the ball 30d pressed by the insertion part 20 deforms the spring 30e in the direction that the diameter of the annular spring 30e increases, while retracting towards the outer periphery of the retaining member 30.

[0102] When the insertion portion 20 of the screwdriver bit 2 is inserted into the opening 30a of the retaining member 30 until the groove 20a formed on the outer periphery of the insertion portion 20 faces the ball 30d, the ball 30d, which is stressed by the spring 30e, is embedded in the groove 20a. This prevents the screwdriver bit 2 from accidentally falling out of the retaining member 30.

[0103] Furthermore, when a predetermined force or more is applied to the screwdriver bit 2 in the direction of pulling it out of the retaining member 30, the ball 30d retracts while deforming the spring 30e in the direction of increasing diameter of the annular spring 30e, thereby enabling the screwdriver bit 2 to be pulled out of the retaining member 30.

[0104] During the insertion and removal of the screwdriver bit 20 through the opening 30a of the retaining member 30, the ball 30d retracts towards the outer periphery of the retaining member 30. Therefore, space is required on the outer periphery of the retaining member 30 for the ball 30d to retract. On the other hand, since the retaining member 30 is inserted into the cylindrical rotary guide member 31, space for the ball 30d to retract cannot be guaranteed between the outer periphery of the retaining member 30 and the inner periphery of the rotary guide member 31.

[0105] Furthermore, when the diameter difference between the retaining member 30 and the rotating guide member 31 is set to ensure space for the ball 30d to retract between the outer periphery of the retaining member 30 and the inner periphery of the rotating guide member 31, since the radial dimension of the screwdriver bit 2 is already determined, the outer diameter of the retaining member 30 cannot be reduced, and the outer diameter of the rotating guide member 31 needs to be increased. Therefore, the device becomes larger.

[0106] In this regard, the rotary guide member 31 is provided with a groove 31a for the guide connecting member 30b. The groove 31a extends through the inner circumference of the rotary guide member 31 to the outer circumference and extends along the axial direction of the rotary guide member 31.

[0107] Here, the balls 30d of the mounting and dismounting retaining mechanism 30c are positioned corresponding to the slot 31a of the rotation guide member 31. That is, in the retaining member 30, the balls 30d of the connecting member 30b and the mounting and dismounting retaining mechanism 30c are arranged coaxially along the axial direction of the rotation guide member 31. Thus, in either the rotation of the rotation guide member 31 and the retaining member 30, or the axial movement of the retaining member 30 relative to the rotation guide member 31, the balls 30d are exposed in the slot 31a of the rotation guide member 31.

[0108] Therefore, during the action of inserting or removing the screwdriver bit 20 into the opening 30a of the retaining member 30, the ball 30d, which retracts towards the outer periphery of the retaining member 30, enters the groove 31a of the rotation guide member 31.

[0109] Therefore, in the structure where the retaining member 30 is inserted into the interior of the cylindrical rotary guide member 31, space can be ensured for the ball 30d of the detachable retaining mechanism 30c to retract. In addition, by using the groove 31a into which the connecting member 30b enters as a space for the ball 30d to retract, the area of ​​the opening provided in the rotary guide member 31 can be suppressed, and strength can be ensured.

[0110] Furthermore, it is not necessary to increase the diameter difference between the retaining member 30 and the rotating guide member 31 to ensure space for the ball 30d to retreat between the outer periphery of the retaining member 30 and the inner periphery of the rotating guide member 31, thus suppressing the enlargement of the device.

[0111] Figure 9 This is a perspective view showing an example of the screw delivery unit and the machine head 8 according to this embodiment, illustrating the details of the screw delivery unit 7 and the machine head 8. Next, the screw delivery unit 7 and the machine head 8 will be described with reference to the respective figures.

[0112] The screw conveying unit 7 includes: a screw conveying motor 70; a pinion 71 mounted on the shaft of the screw conveying motor 70 via a reducer; a rack 72 meshing with the pinion 71; and a locking part 73 connected to the rack 72 and engaging with the connecting screws conveyed from the screw storage unit 6.

[0113] In the screw conveying unit 7, the rack 72 is supported so that it can move vertically along the conveying direction of the connecting screw. The screw conveying unit 7 conveys the connecting screw by rotating the screw conveying motor 70 in both forward and reverse directions and by moving the engaging part 73, which engages with the connecting screw, in the vertical direction.

[0114] The head unit 8 includes: an injection passage 80 through which screws 200 are supplied by the screw delivery unit 7 and through which screwdriver bits 2 pass; a contact member 81 having an injection outlet 81a communicating with the injection passage 80 and contacting the object to be fastened; a contact arm 82 that moves in a forward and backward direction in conjunction with the contact member 81; and an adjustment unit 83 that limits the amount of movement of the contact arm 82. Additionally, the head unit 8 includes a cover member 88 that can be opened and closed to cover the path through which the screws 200 pass from the screw storage unit 6 to the injection passage 80.

[0115] The fastening tool 1 assembles the components constituting the injection passage 80, the contact member 81, and the contact arm 82 to form the head 8, and fixes it to the front frame 10b and the head body 10f constituting the tool body 10. In addition, the fastening tool 1 has a contact switch 84 that is pressed by the contact arm 82.

[0116] The machine head 8 is supported in such a way that the contact member 81 can move in the front-back direction as indicated by arrows A1 and A2, and the contact arm 82 moves in the front-back direction in conjunction with the contact member 81. In the machine head 8, the contact member 81 is subjected to a force in the forward direction by a force-applying member (not shown), and after being pressed against the fastening object and moved backward, the contact member 81 is subjected to a force in the forward direction by the force-applying member.

[0117] In the machine head 8, the contact member 81 is pressed against the object being fastened, and the contact arm 82 moves backward until the contact switch 84 is activated. The amount of movement of the contact arm 82 is adjusted by the adjustment unit 83. The contact switch 84 is switched on and off by being pressed by the contact arm 82. In this example, the state in which the contact switch 84 is not activated when it is not pressed by the contact arm 82 is defined as the contact switch 84 being off, and the state in which the contact switch 84 is activated when the contact arm 82 is pressed is defined as the contact switch 84 being on.

[0118] Next, the structure related to the control and operation of the fastening tool 1 will be described with reference to the figures. The fastening tool 1 includes a trigger 9 for receiving operation and a trigger switch 90 that is operated by the trigger 9. The trigger 9 is located on the front side of the handle 11 and is configured to be operated by the fingers of the hand holding the handle 11. The trigger switch 90 is operated when the trigger 9 is pressed.

[0119] The trigger switch unit 90 is switched on and off by being pressed by the trigger 9. In this example, the state in which the trigger 90 is not operated and the trigger switch unit 90 is not pressed by the trigger 9 and therefore is not operational is defined as the state in which the trigger switch unit 90 is off, and the state in which the trigger 9 is operated and the trigger switch unit 90 is pressed by the trigger 9 and therefore is operational is defined as the state in which the trigger switch unit 90 is on.

[0120] The fastening tool 1 includes a control unit 100, which controls the first drive unit 4, the second drive unit 5, and the screw delivery unit 7 based on the outputs of the trigger switch unit 90, which operates by the operation of the trigger 9, and the contact switch unit 84, which operates by being pressed by the contact member 81.

[0121] The control unit 100 is composed of a substrate on which various electronic components are mounted. Between the screw storage unit 6 and the handle 11, a substrate storage unit 111 is provided on the back side of the screw storage unit 6.

[0122] In power tools that are used with the handle held by hand, a storage section for consumables such as screws is located at the front of the handle. Furthermore, in order to allow the user to hold the handle, space is needed between the handle and the storage section for the fingers to access.

[0123] Therefore, the fastening tool 1 utilizes the space between the screw storage part 6 and the handle 11 to provide a substrate storage part 111 on the back side of the screw storage part 6.

[0124] In power tools used by holding the handle by hand, a structure has been proposed in which a battery is installed at the bottom of the handle, and a base plate is installed between the handle and the battery. With such a structure, the vertical dimension of the power tool along the extension direction of the handle is increased.

[0125] In contrast, by providing a substrate storage portion 111 on the back side of the screw storage portion 6, it is possible to suppress the enlargement of the fastening tool 1 in the vertical direction along the extension direction of the handle 11. Furthermore, since the screw storage portion 6 stores the connecting screw that is wound in a spiral shape, the surface of the screw storage portion 6 facing the handle 11 is approximately circular. This prevents the fastening tool 1 from becoming too large and ensures the volume of the substrate storage portion 111.

[0126] Figures 10A to 10C This is a perspective view from the rear, showing an example of the fastening tool according to this embodiment. Figure 11 This is a perspective view showing an example of the setting unit, illustrating the details of the setting unit 110. The setting unit 110 will now be explained with reference to the figures.

[0127] The fastening tool 1 has the following structure: it includes a second drive unit 5 that moves the screwdriver bit 2 in the forward and backward direction along the axial direction. The second drive unit 5 is driven by a bit movement motor 50. A moving member 32 connected to a pulley 52 and a wire 54 that are driven to rotate by the bit movement motor 50, and a holding member 30 connected to the moving member 32 move forward along the axial direction of the screwdriver bit 2 along a rotation guide member 31.

[0128] Therefore, the amount of movement (advance) of the screwdriver bit 2 can be controlled by controlling the rotation of the bit movement motor 50. That is, by rotating the bit movement motor 50 in conjunction with the rotation of the bit rotation motor 40, which rotates the screwdriver bit 2 in the direction of tightening the screw 200, the amount of advance of the screwdriver bit 2, which follows the screw 200 as it is tightened, can be controlled by the rotation of the bit movement motor 50, thereby controlling the axial stop position of the screwdriver bit 2.

[0129] Therefore, the fastening tool 1 includes a setting unit 110 for setting the advance amount of the screwdriver bit 2. The setting unit 110 is an example of a setting unit, configured to allow selection of any setting value from a plurality of setting values ​​or to allow stepless selection of any setting value.

[0130] In this example, the setting unit 110 is structured so that the setting value is selected by an operation unit 110a consisting of buttons. Alternatively, the operation unit 110a may also be structured so that the setting value is selected by a rotary dial. In addition, the setting unit 110 may also be structured so that the selected setting value is displayed by using a label or engraving to indicate the current value, or by using a display unit 110b such as an LED to indicate the current value, so that the operator can grasp the current setting value.

[0131] The setting part 110 is provided in the base plate storage part 111 provided on the back side of the screw storage part 6, and is respectively provided on the left and right sides of the surface facing the handle 11.

[0132] Therefore, when observing the fastening tool 1 from the rear, the setting section 110 can be visually confirmed from the left and right sides of the handle 11.

[0133] When using the screwdriver by holding the handle 11, the side of the screw storage section 6 facing the handle 11 faces the operator holding the fastening tool 1. Therefore, in the base plate storage section 111 located on the back side of the screw storage section 6, the setting section 110 is provided on the side facing the handle 11, and the display section 110b provided on the setting section 110 is easily visible. This reduces the possibility of the operator missing the display. In addition to the screw depth setting value determined by the advance amount of the screwdriver bit 2, the display section 110b also displays the power on / off status, the operating mode selected from various selectable operating modes, the presence or absence of screws, the remaining amount of screws, and any abnormalities.

[0134] Furthermore, when using the handle 11 by hand, the operation section 110a, including buttons on the setting section 110, is easily visible. Therefore, while holding the handle 11 with one hand, the operation section 110a can be visually checked while the other hand operates it, ensuring reliable operation. Additionally, the display section 110b can be viewed without changing posture or significantly altering the line of sight during operation, preventing the failure to notice alarms or other notifications during continuous work. Furthermore, it prevents the operator from unconsciously pointing the injection nozzle 81a towards themselves while looking at the display section 110b or the operation section 110a.

[0135] Furthermore, the substrate constituting the control unit 100 is stored in the substrate storage section 111. In this substrate, by mounting switches constituting the operation section 110a and lamps constituting the display section 110b on the surface facing the handle 11, the substrate used for the setting section 110 other than the control section 100 can be omitted.

[0136] <Example of the operation of the fastening tool in this embodiment>

[0137] Figure 12A This is a side sectional view illustrating an example of the operation of the fastening tool according to this embodiment. Figure 12B This is a top sectional view showing an example of the operation of the fastening tool according to this embodiment. Next, the fastening operation of the fastening tool according to this embodiment will be explained with reference to the figures.

[0138] like Figure 1A As shown, when the fastening tool 1 is in standby mode, the front end of the screwdriver bit 2 is located in standby position P1 behind the injection passage 80, which can supply screws 200 to the injection passage 80.

[0139] If the contact member 81 is pressed against the object to be fastened, the contact switch 84 is pressed by the contact arm 82 and becomes closed, the trigger 9 is operated and the trigger switch 90 becomes closed, then the control unit 100 drives the bit movement motor 50 of the second drive unit 5, and drives the bit rotation motor 40 of the first drive unit 4 at a predetermined time.

[0140] When the bit moving motor 50 is driven to rotate in the positive direction, the pulley 52 rotates in the positive direction, thereby winding the wire 54 around the pulley 52. ​​By winding the wire 54 around the pulley 52, the second moving member 32c connected to the wire 54 is guided by the rotation guide member 31 to move forward in the axial direction. When the second moving member 32c moves forward, the first moving member 32a is pressed by the second moving member 32c via the bearing 32b, and together with the second moving member 32c, compresses the force-applying member 33 and moves it forward in the axial direction.

[0141] When the first moving part 32a moves forward, the connecting part 30b of the holding part 30, which is connected to the connecting part 30b through the first moving part 32a, is guided by the groove 31a of the rotation guide part 31 and moves forward along the axial direction of the screwdriver bit 2.

[0142] As a result, the screwdriver bit 2 held in the holding member 30 moves forward in the direction indicated by arrow A1, engages with the screw 200 supplied to the ejection port 81a of the head 8, and causes the screw 200 to move forward and press against the object to be fastened.

[0143] When the bit rotation motor 40 is driven to rotate in the positive direction, the rotation guide member 31 rotates in the positive direction. When the rotation guide member 31 rotates in the positive direction, the connecting member 30b connected to the holding member 30 is pressed by the groove 31a of the rotation guide member 31, thereby keeping the member 30 and the rotation guide member 31 rotating together.

[0144] Therefore, the screwdriver bit 2 held in the holding member 30 rotates the screw 200 in the positive direction (clockwise) and screws it into the object to be fastened. The control unit 100, in conjunction with the operation of rotating the screwdriver bit 2 by the first drive unit 4 to screw the screw into the object to be fastened, moves the screwdriver bit 2 forward by the second drive unit 5 based on the load applied to the bit rotation motor 40, the rotation speed of the bit rotation motor 40, the load applied to the bit movement motor 50, the rotation speed of the bit movement motor 50, etc., so that the screwdriver bit 2 follows the screw being screwed into the object to be fastened.

[0145] like Figure 12A , Figure 12B As shown, when the tip of the screwdriver bit 2 protrudes from the ejection port 81a of the contact member 81 and reaches the predetermined work end position P2, the control unit 100 stops driving the bit rotation motor 40 and reverses the bit movement motor 50. The control unit 100 determines that the tip of the screwdriver bit 2 has reached the work end position P2 based on the rotational speed of the bit movement motor 50.

[0146] When the bit moving motor 50 rotates in the opposite direction, the pulley 52 rotates in the opposite direction, thereby pulling the wire 54 out of the pulley 52. ​​As the wire 54 is pulled out of the pulley 52, the force-applying member 33, which has been compressed by the forward movement of the second moving member 32c, extends, pressing the second moving member 32c backward.

[0147] The second moving part 32c is pressed rearward by the force-applying part 33, thereby being guided by the rotation guide part 31 to move in the rearward direction along the axial direction. When the second moving part 32c moves rearward, the first moving part 32a is pressed by the second moving part 32c via the bearing 32b, and moves together with the second moving part 32c in the rearward direction along the axial direction.

[0148] When the first moving part 32a moves in the rearward direction, the connecting part 30b of the holding part 30, which is connected to the first moving part 32a via the connecting part 30b, is guided by the groove 31a of the rotation guide part 31 and moves in the rearward direction along the axial direction of the screwdriver bit 2.

[0149] Therefore, the screwdriver bit 2 held in the holding member 30 moves backward, and the front end of the screwdriver bit 2 returns to the standby position P1. Furthermore, the moving member 32, by having a buffer member 32d made of rubber or the like on the rear side of the second moving member 32c, prevents the second moving member 32c from directly contacting the rear frame 10c during its backward movement, thus suppressing noise generation and damage. When the second moving member 32c is pressed backward by the force-applying member 33, and the front end of the screwdriver bit 2 returns to the standby position P1, the control unit 100 stops the rotation of the bit moving motor 50. If the trigger switch 90 is off, the control unit 100 rotates the screw delivery motor 70 in one direction, thereby lowering the engaging part 73. When the engaging part 73 descends to the position where it engages with the next screw 200, the control unit 100 reverses the screw delivery motor 70, causing the engaging part 73 to rise, supplying the next screw 200 to the injection passage 80.

[0150] Figures 13A-13C This is a cross-sectional view showing the tightened state of the screws. Figure 13A This refers to a state where the head 201 of the screw 200 does not rise from or sink into the surface of the object 202 being fastened, a state known as coplanarity. Figure 13B This indicates that the head 201 of the screw 200 is raised from the object 202 being fastened. Figure 13C This indicates the state in which the head 201 of the screw 200 is embedded in the object 202 being fastened.

[0151] When the tightening tool 1 reaches the working end position P2 at the tip of the screwdriver bit 2, if the screw 200 is a countersunk screw, as follows: Figure 13AAs shown, the advance amount of the screwdriver bit 2 is preferably set in a so-called coplanar state, where the surface of the head 201 of the screw 200 is the same as the surface of the object being fastened 202. Furthermore, the screw 200 is not limited to a countersunk screw; if it is a pan head screw, connecting screw, truss screw, etc., the advance amount of the screwdriver bit 2 is preferably set in a way that the seat surface of the head 201 of the screw 200 contacts the surface of the object being fastened 202 without the head 201 of the screw 200 becoming raised from the object being fastened 202.

[0152] When the tip of screwdriver bit 2 reaches the end-of-work position P2, at the head 201 of screw 200, as shown... Figure 13B When the screwdriver bit 2 is in a state of being lifted from the object being fastened 202 as shown, the forward advance of the screwdriver bit 2 is increased until the working end position P2 is advanced. On the other hand, at the head 201 of the screw 200, as shown... Figure 13C When the screwdriver bit 2 is embedded in the fastening object 202 as shown, reduce the forward movement of the screwdriver bit 2 and retract the work end position P2.

[0153] Therefore, the movement amount (forward movement) of the screwdriver bit 2 can be set via the setting unit 110. The movement amount (forward movement) of the screwdriver bit 2 is determined by the rotational speed (rotation amount) of the bit movement motor 50. Furthermore, starting from the initial position of the screwdriver bit 2, i.e., the standby position P1, the bit movement motor 50 is rotated by the set rotation amount, and then the rotation of the bit movement motor 50 is stopped or reversed, thereby controlling the work end position P2. As a result, the screwing depth can be adjusted.

[0154] Explanation of reference numerals in the attached figures

[0155] 1. Fastening tool; 10. Tool body; 10a. Housing; 10b. Front frame; 10c. Rear frame; 10d. Connecting part; 10e. Screw; 10f. Head body; 11. Handle; 12. Battery; 13. Battery mounting part; 2. Screwdriver bit; 3. Bit holder; 30. Holding part; 30a. Opening 30b··· Connecting component, 31··· Rotational guide component, 31a··· Groove, 32··· Moving component, 32a··· First moving component, 32b··· Bearing, 32c··· Second moving component, 33··· Force-applying component, 34a··· Bearing, 4··· First drive unit, 40··· Bit rotary motor (first motor), 40a··· Shaft, 41··· • Gearbox, 41a··· Shaft, 42··· Bearing (bearing), 5··· Second drive unit, 50··· Bit moving motor (motor, second motor), 50a··· Shaft, 51··· Gearbox, 51a··· Shaft, 52··· Pulley (rotating part), 52a··· Outer periphery, 53··· Bearing, 54··· Wire (transmission part), 6··· Screw storage unit, 7··· Screw conveyor Feeding section, 70··· Screw conveyor motor, 71··· Pinion, 72··· Rack, 73··· Engaging section, 8··· Machine head, 80··· Injection passage, 81··· Contact component, 81a··· Injection outlet, 82··· Contact arm, 83··· Adjustment section, 84··· Contact switch section, 9··· Trigger, 90··· Trigger switch section, 100··· Control section, 110··· Setting section.

Claims

1. A fastening tool, comprising: A cylindrical rotating guide component extends in one direction and is supported by bearings to enable rotation; The retaining member has an opening for the screwdriver bit to be inserted in a removable manner, and moves axially within the rotating guide member along the extension direction of the rotating guide member, and rotates together with the rotating guide member; The moving component causes the retaining component to move along the rotation guide component in the front-to-back direction; The rotating component is driven to rotate by an electric motor; and The transmission component is connected to the moving component and has flexibility to be wound along the outer periphery of the rotating component. The rotating component is rotated by the motor, thereby causing the moving component to move in a direction that presses the screw engaged with the screwdriver bit toward the object to be fastened, using the transmission component.

2. The fastening tool according to claim 1, wherein, The transmission component extends in a direction parallel to the extension direction of the rotation guide component.

3. The fastening tool according to claim 1, wherein, The center of the rotating component is offset to one side relative to the rotating guide component, and when viewed from the axial direction of the rotating component, the outer periphery of the rotating component, which is configured to be wound around by the transfer component, overlaps with the rotating guide component.

4. The fastening tool according to claim 2, wherein, The center of the rotating component is offset to one side relative to the rotating guide component, and when viewed from the axial direction of the rotating component, the outer periphery of the rotating component, which is configured to be wound around by the transfer component, overlaps with the rotating guide component.

5. The fastening tool according to any one of claims 1 to 4, wherein, The shaft of the electric motor is offset to one side relative to the rotation guide component.

6. The fastening tool according to any one of claims 1 to 4, wherein, The amount of rotation of the rotating component required to move the moving component from one end to the other within a movable range along one direction is less than 360°.

7. The fastening tool according to any one of claims 1 to 5, wherein, The fastening tool has a force-applying component. The moving component moves in one direction to press the screw engaged with the screwdriver bit toward the object to be fastened. The force-applying component is compressed and applies force to the moving component in another direction opposite to the first direction.

8. The fastening tool according to claim 1, wherein, The fastening tool includes: The main body of the tool extends in one direction; The handle extends in another direction, intersecting the extension direction of the tool body; A storage section is provided on one side of the handle along the extension direction of the tool body, and for storing consumables; and A substrate storage section is provided on the side of the storage section facing the handle, and stores the substrate.

9. The fastening tool according to claim 8, wherein, The substrate storage section has a display section on the side facing the handle.

10. The fastening tool according to claim 9, wherein, The display unit is disposed on the substrate.

11. The fastening tool according to any one of claims 8 to 10, wherein, The substrate storage section has an operating section on the side facing the handle.

12. The fastening tool according to claim 11, wherein, The operating part is disposed on the substrate.

13. The fastening tool according to claim 11, wherein, The operating parts are respectively provided on the left and right sides of the face facing the handle.

14. The fastening tool according to claim 9, wherein, The display shows at least one of the following: the screw depth setting value determined by the advance amount of the screwdriver bit, the power on / off status, the selected operating mode, whether there is a screw, the remaining amount of screw, and whether there is any abnormality.

Images