Working machine

Abstract

To provide a working machine having good workability.SOLUTION: A screw feeding mechanism of a working machine is configured to feed a connection screw sheet 200 holding a large number of screws 210 in parallel and to supply the screws 210 one by one to a fastening position from below. The screw feed mechanism has a slider 112 having a sheet discharge port for discharging the connection screw sheet 200. The slider 112 has a recess 118 in an upper surface portion thereof. The sheet discharge port opens to the recessed portion 118. The recessed portion 118 is open rightward and configured to allow the connection screw sheet 200 discharged from the sheet discharge port to be discharged rightward. The slider 112 has a sheet cutting protrusion 172 engageable with the engagement hole of the connection screw sheet 200. The sheet cutting convex portion 172 is provided at a position not protruding upward from the upper surface portion of the slider 112 in the vicinity of the sheet discharge port.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present invention relates to a work machine equipped with a screw feed mechanism. [Background technology]

[0002] Patent Document 1 discloses a screw supplying device that pitch-feeds a screw connecting band, which holds a number of screws in parallel on a sheet material, in conjunction with the screw tightening operation of a screw tightening machine main body, to supply the screws one by one to the screw tightening position of the screw tightening machine main body. This screw supplying device has a sheet material receiving base 71 that protrudes upward from a sheet material discharge port. The sheet material receiving base 71 has a protrusion 72 at its tip that corresponds to a claw engagement hole 62a of the sheet material 61. An operator can grasp an empty sheet material 61 discharged from the sheet material discharge port and fold it back at the tip of the sheet receiving base 71 to insert the protrusion 72 into the claw engagement hole 62a, and then tear (cut) the sheet material 61 by pulling the sheet material 61 in the folding direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4990015 Publication Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration of Patent Document 1, for example, when trying to tighten a screw close to a wall or ceiling, the protrusion 72 may hit the wall or ceiling, making the work difficult.

[0005] An object of the present invention is to provide a work machine with good workability. [Means for solving the problem]

[0006] One aspect of the present invention is A work machine equipped with a screw feed mechanism that feeds a connected screw sheet that holds a large number of screws in parallel and supplies the screws one by one to a tightening position from below, the screw feed mechanism has a slider having a sheet discharge port for discharging the connecting screw sheet; The slider has a recess on its top surface, the sheet discharge port opens into the recess, The recess is open in a first direction, which is one of the left and right directions, and is configured to be able to discharge the connecting screw sheet discharged from the sheet discharge port in the first direction. This is a work machine characterized by the above.

[0007] Another aspect of the present invention is a method for producing a semiconductor device comprising: A work machine equipped with a screw feed mechanism that feeds a connected screw sheet that holds a large number of screws in parallel and supplies the screws one by one to a tightening position from below, the screw feed mechanism has a slider having a sheet discharge port for discharging the connecting screw sheet; the slider has a seat engaging portion that can engage with an engaging hole of the connecting screw seat, the sheet engaging portion is provided in a position near the sheet discharge port so as not to protrude above an upper surface of the slider; This is a work machine characterized by the above.

[0008] The present invention may be expressed as an "electric working machine," "electric tool," "electrical equipment," etc., and such expressions are also valid aspects of the present invention. [Effects of the Invention]

[0009] According to the present invention, a work machine with good workability can be provided. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a side cross-sectional view of a work machine 1 according to a first embodiment. [Figure 2] 1A is a plan cross-sectional view of the working machine 1. FIG. 1B is a front view of the working machine 1. [Figure 3] FIG. 2 is an exploded perspective view of the screw feed mechanism of the work machine 1 as viewed from the front upper right side. [Figure 4] An enlarged view of part P in Figure 3. [Figure 5] 4 with a connecting screw sheet 200 added and some parts omitted. [Figure 6] FIG. 2 is an exploded perspective view of the screw feed mechanism as viewed from the upper front left side. [Figure 7] FIG. 4 is a perspective view of the screw feed mechanism as seen from the upper front left side. [Figure 8] FIG. 4 is a perspective view of the screw feed mechanism as viewed from the front upper right side. [Figure 9] FIG. 9 is a perspective view of FIG. 8 from an upwardly shifted viewpoint. [Figure 10] (A) is a side view of the screw feed mechanism, (B) is a front view of the screw feed mechanism, and (C) is a plan view of the screw feed mechanism. [Figure 11] 11A is a perspective view of the screw feed mechanism and the connecting screw sheet 200 fed by the screw feed mechanism, as seen from the front upper right side, and FIG. 11B is a perspective view of FIG. 11A, with the viewpoint shifted upward. [Figure 12] 12(A) is a cross-sectional view taken along line AA in FIG. 12(B), and FIG. 12(B) is a side view of the screw feed mechanism and the connected screw sheet 200 fed by the screw feed mechanism. [Figure 13] 12(A) is a diagram showing the state in which the connecting screw seat 200 is pulled to the left in FIG. 12(A). (B) is a side view of the left slider 113 seen from the right. (C) is a cross-sectional view taken along line BB in FIG. 13(B). (D) is an external view of the connecting screw seat 200. [Figure 14] 10A and 10B are explanatory diagrams illustrating the operation of a release lever 155 in the screw feed mechanism. [Figure 15] 10A and 10B are diagrams showing the first half of the operation of the screw feed mechanism. [Figure 16] 10A and 10B are diagrams showing the latter half of the operation of the screw feed mechanism. [Figure 17] 10 is a diagram showing that the connecting screw seat 200 is ejected to the right from the recess 118 of the right slider 114 during work near the ceiling 191. FIG. [Figure 18] FIG. 10 is an explanatory diagram of a screw feed mechanism of a work machine according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (Embodiment 1) 1 to 18 relate to a work machine 1 and a screw feed mechanism of the work machine 1 according to a first embodiment. The work machine 1 is a screwdriver. FIGS. 1 to 6 define the mutually perpendicular front-rear, up-down, and left-right directions of the work machine 1. The left-right directions are defined with reference to a user looking forward. Note that the hatching in FIG. 10(B) indicates the range of the recess 118 and does not represent a cross section. The hatching in FIGS. 13(B) and (C) indicates the range of the sheet cutting protrusion 172 and does not represent a cross section.

[0012] (Main body configuration) Fig. 1 is a side cross-sectional view of a working machine 1 according to embodiment 1. Fig. 2(A) is a plan cross-sectional view of the working machine 1. Fig. 2(B) is a front view of the working machine 1.

[0013] The work machine 1 includes a housing 10. The housing 10 is, for example, a resin molded body having a two-piece left and right structure that are joined together by screwing or the like. The housing 10 has a body portion 11, a handle portion 12, and a battery pack attachment portion 13. The body portion 11 is a cylindrical portion that extends in the front-to-rear direction and houses a motor 20 and the like. The handle portion 12 extends downward from the body portion 11. A trigger switch 15 is provided at the upper end of the handle portion 12, which allows the user to start or stop the motor 20. The battery pack attachment portion 13 is provided at the lower end of the handle portion 12. A battery pack 17, which serves as the power source for the work machine 1, is detachably attached to the battery pack attachment portion 13.

[0014] The work machine 1 includes a gear case 14. The gear case 14 is made of metal such as aluminum, and is connected to the front of the body 11. The gear case 14 houses a reduction mechanism 31, a clutch mechanism 31, etc. A screw feed mechanism of the work machine 1 is connected to the front of the gear case 14.

[0015] The work machine 1 includes a motor 20, a reduction gear mechanism 31, a clutch mechanism 32, and a spindle 35. The motor 20 is, for example, an inner rotor type brushless motor. The reduction gear mechanism 31 reduces the rotation speed of the motor 20. The clutch mechanism 32 switches between transmitting and interrupting rotation between the output side of the reduction gear mechanism 31 and the spindle 35. The clutch mechanism 32 and the spindle 35 are urged forward relative to the reduction gear mechanism 31 by a clutch spring 33. The spindle 35 holds a bit 110, which serves as an end tool, so that the bit 110 can rotate integrally with the spindle 35. During screw tightening, the bit 110 and the spindle 35 move backward relatively against the urging force of the clutch spring 33, the clutch mechanism 32 enters a transmission state, and rotation is transmitted from the output side of the reduction gear mechanism 31 to the spindle 35. When not in operation, the clutch spring 33 biases the clutch mechanism 32 and spindle 35 forward away from the reduction mechanism 31, the clutch mechanism 32 is in a disconnected state, and rotation is not transmitted from the output side of the reduction mechanism 31 to the spindle 35.

[0016] The work machine 1 is equipped with a magazine 40 that serves as a connecting screw sheet storage section. The magazine 40 is attached to the housing 10. The magazine 40 stores a roll of connecting screw sheets 200, shown in FIG. 13(D). The connecting screw sheet 200 holds a large number of screws 210 in parallel, spanning both walls of a U-shape. The connecting screw sheet 200 has an engagement hole 201 at the base of the U-shape. The engagement hole 201 is hooked onto a sheet cutting protrusion 172 (FIGS. 13(B) and (C)), which will be described later, when tearing off the portion of the screw 210 that has been used in work.

[0017] (Configuration of screw feed mechanism) The screw feed mechanism is configured to feed out a connected screw sheet 200 that holds a large number of screws 210 in parallel, and to supply the screws 210 one by one from below to the tightening position.

[0018] Fig. 3 is an exploded perspective view of the screw feed mechanism as seen from the front upper right side. Fig. 4 is an enlarged view of part P in Fig. 3. Fig. 5 is a view in which a connecting screw sheet 200 has been added to Fig. 4 and some parts have been omitted. Fig. 6 is an exploded perspective view of the screw feed mechanism as seen from the front upper left side. Figs. 7 to 9 are perspective views of the screw feed mechanism. Figs. 10(A) to 10(C) are a side view, a front view, and a plan view of the screw feed mechanism, respectively.

[0019] The casing 102 is detachably connected to the front part of the gear case 14 by the connecting part 101. The casing 102 is, for example, a resin molded body. The casing 102 has a cam groove 116 formed as a through-hole on the left side surface. The cam groove 116 engages with a roller 132 attached to one end of a lever 131 (described later). The casing 102 has a notch 117 spanning the top surface of the front part and the right side surface. The notch 117 is provided to expose a recess 118 of the slider 112 (described later) upward and to the right when the slider 112 (described later) retracts into the casing 102. The protector 103 is attached to the casing 102 and protects the casing 102.

[0020] As shown in FIG. 1 , the screw tightening depth adjustment cam 104 is attached to the casing 102 and contacts a stopper extension member 115 (described later) to regulate the retracted position of the stopper 160 (the position furthest retracted relative to the casing 102). The screw tightening depth adjustment dial 106 is a member that allows the user to adjust the rotational position of the screw tightening depth adjustment cam 104 to adjust the retracted position of the stopper 160 and thereby adjust the screw tightening depth. The ball 105 enters the recess 106a of the screw tightening depth adjustment dial 106 and also enters a recess (not shown) formed on the underside of the casing 102, forming a detent mechanism that maintains the position of the screw tightening depth adjustment dial 106. The O-ring 107 is a member that biases the screw tightening depth adjustment dial 106 upward and, together with the ball 105, forms a detent mechanism. The screw 109 rotatably attaches the screw tightening depth adjustment dial 106 to the casing 102. The washer 108 is interposed between the head of the screw 109 and the underside of the screw-tightening depth adjustment dial 106 to suppress wear.

[0021] The slider 112 is a combination of a left slider 113 and a right slider 114, each of which is a resin molded body. The slider 112 is a substantially rectangular parallelepiped, is located in front of the casing 102, and is biased forward relative to the casing 102 by a slider spring 111.

[0022] As shown in FIG. 10(C), the slider 112 has a sheet discharge opening 124 for discharging the connecting screw sheet 200. The slider 112 has a recess 118 on its upper surface. The recess 118 is provided on the front upper surface of the right slider 114. The sheet discharge opening 124 opens on one surface of the recess 118 that faces upward. The recess 118 is open to the right, and is configured so that the connecting screw sheet 200 discharged from the sheet discharge opening 124 can be discharged to the right as shown in FIG. 17(E).

[0023] As shown in Figure 10(B) and other figures, the slider 112 has a sheet insertion opening 119 for inserting the connecting screw sheet 200 unwound from the roll state. The sheet insertion opening 119 is located below the sheet discharge opening 124 shown in Figure 10(C) and faces downward.

[0024] As shown in Figure 5 and other figures, the left slider 113 has a pair of front and rear sheet guide protrusions 173 that extend vertically. The sheet guide protrusions 173 guide the connecting screw sheet 200 from the sheet insertion opening 119 (Figure 10(B)) toward the sheet discharge opening 124 (Figure 10(C)). In addition, the sheet guide protrusions 173 guide the connecting screw sheet 200 so that the sheet cutting protrusions 172 fit into the engagement holes 201 (Figure 13(D)) of the connecting screw sheet 200 when the connecting screw sheet 200 is pulled leftward and torn off as shown in Figure 13(A).

[0025] 5 and other figures, the left slider 113 has a long hole 171 extending in the up-down direction. The long hole 171 is located between a pair of sheet guide protrusions 173 in the front-rear direction. The long hole 171 is provided to allow a sheet feed claw 126 and a sheet holding claw 146, which will be described later, to pass through the left slider 113 from left to right.

[0026] The slider 112 has a sheet cutting protrusion 172 that can engage with an engagement hole 201 of the connecting screw seat 200. The sheet cutting protrusion 172 is provided on the right surface of the left slider, and is located above and to the left of the sheet discharge opening 124. The sheet cutting protrusion 172 is provided in a position near the sheet discharge opening 124 that does not protrude above the upper surface of the slider 112. As shown enlarged in FIG. 13(C), the sheet cutting protrusion 172 is provided on an inclined surface 174 of the left slider 113. The inclined surface 174 is inclined so that it slopes leftward as it goes upward.

[0027] As shown in Figures 4 and 6, the sheet feeder 125 has a sheet feed claw 126 and a protrusion 127. Two sheet feed claws 126 are provided, one above the other. The sheet feeder 125 is supported by a sheet feeder support section 129 and is located to the left of the left slider 113. The sheet feed claw 126 passes through an elongated hole 171 in the left slider 113 and can be hooked into an engagement hole 201 in a connecting screw seat 200. The protrusion 127 engages with a release lever 155, which will be described later. A spring 128 is interposed between the sheet feeder 125 and the sheet feeder support section 129 and biases the sheet feeder 125 to the right (in the direction in which the sheet feed claw 126 protrudes into the elongated hole 171) relative to the sheet feeder support section 129. The shaft 130 extends parallel to the vertical direction and rotatably connects the sheet feeder 125 to the sheet feeder support portion 129. Supported by the shaft 130, the sheet feed claw 126 can rotate in the left-right direction.

[0028] As shown in FIGS. 4 and 6 , the sheet holding member 145 has a sheet holding claw 146 and a protrusion 147. The sheet holding member 145 is supported by a sheet holding member support portion 149 and is located to the left of the left slider 113. The sheet holding claw 146 passes through an elongated hole 171 in the left slider 113 and can be hooked into an engagement hole 201 in a connecting screw seat 200. The protrusion 147 engages with a release lever 155, which will be described later. A spring 148 is interposed between the sheet holding member 145 and the sheet holding member support portion 149 and biases the sheet holding member 145 rightward (in the direction in which the sheet holding claw 146 protrudes into the elongated hole 171) relative to the sheet holding member support portion 149. The shaft 150 extends parallel to the vertical direction and rotatably connects the sheet holding member 145 to the sheet holding member support portion 149. The support of the shaft 150 allows the sheet holding claw 146 to rotate in the left and right directions.

[0029] A through hole 134 in the center of the lever 131 shown in FIG. 6 is rotatably supported by a lever support shaft 120 that protrudes leftward from the left surface of the left slider 113. A roller 132 is attached to the rear of the lever 131 with a screw 133 (FIG. 4). A pin protrusion base 135 to which a pin (not shown) is attached by welding or the like is provided at the front of the lever 131. This pin protrudes rightward from the pin protrusion base 135 and passes through a long hole 138 in the sheet feeder support portion 129 (engages with the long hole 138). As a result, the sheet feeder support portion 129 moves up and down in conjunction with the rotation of the lever 131.

[0030] The cover 136 is, for example, a resin molded body, and is attached to the left part of the left slider 113 with a screw 137. The cover 136 covers part of the lever 131, the sheet feeder support part 129, and the left side of the sheet holding member support part 149.

[0031] The bit guide 154 is a cylindrical member that supports the bit 110 inside and suppresses vibration of the bit 110. The bit guide 154 is sandwiched between the left slider 113 and the right slider 114.

[0032] The release lever 155 is a member that allows the user to release the engagement between the sheet feed pawl 126 and the sheet holding pawl 146 and the connecting screw sheet 200, and is used to freely feed or retract the connecting screw sheet 200 by hand. As shown in FIGS. 14(A) and (C), in the initial position, the release lever 155 protrudes the sheet feed pawl 126 (and the sheet holding pawl 146). As shown in FIGS. 14(B) and (D), when the release lever 155 is operated (rotated) relative to the initial position, the release lever 155 pushes the protrusion 127 of the sheet feeder 125 (and the protrusion 147 of the sheet holding member 145) to the right, causing the sheet feed pawl 126 (and the sheet holding pawl 146) to retract against the bias of the springs 128 and 148 shown in FIG. 4, and the state in which the sheet feed pawl 126 (and the sheet holding pawl 146) is caught in the engagement hole 201 of the connecting screw sheet 200 is released. When the operation of the release lever 155 is released, the sheet feed claw 126 (and the sheet holding claw 146) protrudes due to the force of the springs 128 and 148 shown in Figure 4, and the convex portion 127 of the sheet feeder 125 (and the convex portion 147 of the sheet holding member 145) returns the release lever 155 to its initial position.

[0033] The stopper 160 is, for example, a resin molded body, is attached to the front of the slider 112, and is movable back and forth together with the slider 112 relative to the casing 102. The front-to-rear position of the stopper 160 relative to the slider 112 can be adjusted using a button 121. Specifically, a through-hole 123 penetrating in the left-right direction is provided in the right slider 114, and an elongated hole 161 communicating with the through-hole 123 is provided on the right side surface of the stopper 160, and the button 121 passes through the through-hole 123 and the elongated hole 161. The elongated hole 161 has a narrowed shape at the center in the front-to-rear direction, and the button 121 passes through either the front or rear of the elongated hole 161. The button 121 is biased rightward by a spring 122. The user can move the stopper 160 back and forth relative to the slider 112 by pressing the button 121 leftward against the bias of the spring 122.

[0034] 8, the stopper extension member 115 is connected to the rear of the stopper 160 and is movable together with the stopper 160 in the front-to-rear direction relative to the casing 102. The retracted positions of the stopper 160 and the slider 112 are determined when the stopper extension member 115 abuts against the outer peripheral surface of the screw tightening depth adjustment cam 104. FIG. 10(C) shows the state in which the stopper 160 and the slider 112 are retracted to the furthest extent relative to the casing 102.

[0035] A pair of left and right screw guides 164 are rotatably connected to the stopper 160 by shafts 162 extending parallel to the vertical direction. The screw guides 164 guide the screws 210 so that they do not fall after being pushed forward by the bit 110 and coming out of the connecting screw seat 200. A pair of left and right springs 163 urge the rear portions of the screw guides 164 forward so that the front ends of the pair of left and right screw guides 164 move closer to each other. A retaining ring 165 prevents the shafts 162 from coming off the stopper 160. The nose cap 166 is a member that abuts against a mating material (such as a wall) and is attached to the front portion of the stopper 160.

[0036] 11(A), (B) and 12(A), (B) show the screw feed mechanism and the connecting screw sheet 200 fed by the screw feed mechanism. As shown in these figures, after the connecting screw sheet 200 leaves the sheet discharge port 124 (FIG. 10(C)), it bends in the direction of its winding when in a rolled state and tilts to the right. At this time, the presence of the recess 118 causes the connecting screw sheet 200 to bend from a lower position than if the recess 118 were not present. As will be described later in FIG. 17(E), when working in a position close to the ceiling 191, the connecting screw sheet 200 protruding from the sheet discharge port 124 (FIG. 10(C)) can be pressed from above to prevent it from protruding upward from within the recess 118.

[0037] Figure 13(A) shows the state in which the connecting screw sheet 200 has been pulled to the left in Figure 12(A). To remove the connecting screw sheet 200 that has come out of the sheet discharge port 124 (Figure 10(C)), the connecting screw sheet 200 is pulled to the left as shown in Figure 13(A) and the engagement holes 201 of the connecting screw sheet 200 are hooked onto the sheet cutting protrusions 172 of the left slider 113. By further pulling the connecting screw sheet 200 to the left, the connecting screw sheet 200 can be torn off along the extension line L (Figure 13(D)) of the upper edge of the engagement holes 201.

[0038] Figures 15(A) to (F) and 16(A) to (F) show the operation of the screw feed mechanism. In Figures 15(A) to (F) and 16(A) to (F), the main body of the work machine 1 (portions other than the screw feed mechanism) is not shown.

[0039] 15(A) and (B) show the initial state, i.e., a state in which the nose cap 166 is not in contact with the mating member (or a state in which the nose cap 166 is in contact with the mating member but not pressed against the mating member). In the initial state, the sheet feed pawl 126 is in the lowest position and is hooked into the engagement hole 201 (FIG. 13(D)) of the connecting screw seat 200. In FIG. 15(A), the sheet holding pawl 146 is located behind the lower sheet feed pawl 126, and the sheet holding pawl 146 is also hooked into the engagement hole 201 (FIG. 13(D)) of the connecting screw seat 200.

[0040] 15(C) and (D) show a state in which the slider 112 and stopper 160 are in the process of retracting relative to the casing 102 with the nose cap 166 pressed against the mating member (not shown), and the roller 132 is in the process of descending the inclined cam groove 116. In the process of transitioning from the state of FIGS. 15(A) and (B) to the state of FIGS. 15(C) and (D), the roller 132 descends, i.e., the lever 131 shown in FIG. 6 etc. rotates, causing the sheet feed pawl 126 to move upward together with the connecting screw seat 200. Furthermore, the inclined surface at the bottom of the sheet holding pawl 146 is pressed against the lower edge of the engagement hole 201 (FIG. 13(D)) of the connecting screw seat 200, and the sheet holding pawl 146 retracts to the left along the inclined surface.

[0041] 15(E) and (F) show a state in which the slider 112 and stopper 160 have further retracted relative to the casing 102 from Figures 15(C) and (D), and the roller 132 has finished descending the inclined cam groove 116. In this state, the roller 132 is at its lowest position, the sheet feed pawl 126 is at its highest position, and one screw in the connecting screw seat 200 fed by the sheet feed pawl 126 is in the fastening position, i.e., in a position on the extension of the axis of the bit 110. In addition, to the right of the sheet holding pawl 146 is an engagement hole 201 (Figure 13(D)) in the connecting screw seat 200, and the sheet holding pawl 146 is caught in the engagement hole 201.

[0042] 16(A) and (B) show a state (screw tightening completed state) in which the slider 112 and stopper 160 have further retracted relative to the casing 102 from Figures 15(C) and (D), the roller 132 has retracted along the straight portion of the cam groove 116, and the stopper extension member 115 shown in Figure 3 has come into contact with the screw tightening depth adjustment cam 104. In the process of transitioning from the state of Figures 15(C) and (D) to the state of Figures 16(A) and (B), the bit 110 engages with the screw 210, and the clutch mechanism 32 shown in Figure 1 enters the transmission state, completing the tightening of the screw 210 into the mating material (not shown).

[0043] 16(C) and (D) show a state in which the slider 112 and stopper 160 have advanced relative to the casing 102 from the state shown in Figures 16(A) and (B), and the roller 132 is in the middle of climbing up the slope of the cam groove 116. In the process of transitioning from the state shown in Figures 16(A) and (B) to the state shown in Figures 16(C) and (D), the roller 132 rises, i.e., the lever 131 shown in Figure 6 and the like rotates, causing the sheet feed pawl 126 to descend, with the sloped surface at its bottom pressed against the lower edge of the engagement hole 201 (Figure 13(D)) of the connecting screw seat 200, and the sheet feed pawl 126 retracting to the left along the sloped surface.

[0044] 16(E) and (F) show a state (initial state) in which the slider 112 and stopper 160 have further advanced relative to the casing 102 from the states shown in FIGS. 16(C) and (D), and the nose cap 166 has separated from the mating member (not shown). During the transition from the states shown in FIGS. 16(C) and (D) to the states shown in FIGS. 16(E) and (F), the roller 132 rises, i.e., the lever 131 shown in FIG. 6 etc. rotates, causing the sheet feed pawl 126 to descend to the position of the engagement hole 201 (FIG. 13(D)) of the connecting screw seat 200 and become engaged in the engagement hole 201. Note that in FIG. 16(E), as in FIG. 15(A), the sheet holding pawl 146 is located at the back of the lower sheet feed pawl 126, and the sheet holding pawl 146 is also engaged in the engagement hole 201 (FIG. 13(D)) of the connecting screw seat 200.

[0045] 17(A) to 17(E) are diagrams showing the connecting screw sheet 200 being discharged to the right from the recess 118 of the right slider 114 during work near the ceiling 191. In FIGS. 17(A) to 17(E), the main body of the work machine 1 (portions other than the screw feed mechanism) is not shown.

[0046] 17(A) and (B) show the state before the nose cap 166 is set and pressed against the wall 190 at the screw 210 tightening position. FIGS. 17(C) and (D) show the state after the nose cap 166 has been pressed against the wall 190 from the state shown in FIGS. 17(A) and (B) and the screws 210 have been tightened. FIG. 17(E) shows the state after four more screws 210 have been tightened from the state shown in FIGS. 17(C) and (D). In this state, the connecting screw sheet 200 protruding from the sheet discharge port 124 (FIG. 10(C)) is pressed from above by the ceiling 191 and does not protrude upward from within the recess 118, i.e., does not protrude upward from the top surface of the slider 112.

[0047] This embodiment has the following advantages.

[0048] (1) The screw feed mechanism of the work machine 1 has a slider 112 with a sheet discharge port 124 ( FIG. 10(C) ) for discharging the connecting screw sheet 200. The slider 112 has a recess 118 on its top surface, and the sheet discharge port 124 opens into the recess 118. The recess 118 is open to the right, allowing the connecting screw sheet 200 discharged from the sheet discharge port 124 to be discharged to the right, as shown in FIG. 17(E) . Therefore, when working with a wall or ceiling close to the top of the slider 112, such as when fastening screws 210 against the wall or ceiling (so-called corner driving work), the connecting screw sheet 200 can be discharged to the right via the recess 118. This reduces the occurrence of screw feed failures compared to when the recess 118 is not provided. In a configuration in which a protrusion is provided on the top surface of the slider 112 to ensure an ejection space for the connecting screw sheet 200, the protrusion hits the wall or ceiling when the screw 210 is fastened against the wall or ceiling, resulting in poor workability. In contrast, in this embodiment, the recess 118 ensures an ejection space for the connecting screw sheet 200, preventing the protrusion from hitting the wall or ceiling, thereby improving workability when fastening the screw 210 against the wall or ceiling.

[0049] (2) The slider 112 has a sheet cutting protrusion 172 near the sheet discharge port 124 (FIG. 10C) at a position that does not protrude above the upper surface of the slider 112. Therefore, compared to when a sheet cutting protrusion is provided on the upper surface of the slider 112, deterioration of workability due to the protrusion hitting the wall or ceiling is suppressed. Therefore, workability is improved when tightening the screw 210 near the wall or ceiling.

[0050] (3) The connecting screw sheet 200 is unwound from the roll and discharged from the sheet discharge port 124 (FIG. 10(C)), and the connecting screw sheet 200 bends in the direction of winding when in the rolled state, and tilts to the right (toward the recess 118). Therefore, the user does not need to manually guide the connecting screw sheet 200 discharged from the sheet discharge port 124 (FIG. 10(C)) toward the recess 118, which improves operability.

[0051] (4) The casing 102 has a notch 117 that exposes the recess 118 of the slider 112 that has retracted into the casing 102. This prevents the casing 102 from interfering with the connecting screw sheet 200 that is discharged from the sheet discharge port 124 (FIG. 10(C)).

[0052] (Embodiment 2) Figure 18 is an explanatory diagram of a screw feed mechanism of a work machine according to embodiment 2. Figures 18(A) to 18(C) correspond to Figures 13(A) to 13(C) of embodiment 1, respectively. The following mainly describes the differences from embodiment 1. The screw feed mechanism of this embodiment is obtained by replacing the left slider 113 of embodiment 1 with a left slider 113A. In left slider 113A, the sheet cutting protrusion 172 of left slider 113 is replaced with a sheet cutting blade 172A.

[0053] The sheet-cutting blade 172A is made of metal and is formed integrally with the left slider 113A by, for example, insert molding. The sheet-cutting blade 172A is inclined relative to the front-to-rear direction as shown in FIG. 18(D) (in the illustrated example, it is inclined so that it protrudes more to the right as it approaches the front). This is so that when the connecting screw sheet 200 is pulled to the left as shown in FIG. 18(A), the connecting screw sheet 200 can be cut from its front-to-rear end. In the first embodiment, the sheet-cutting protrusion 172 is hooked onto the engagement hole 201 (FIG. 13(D)) of the connecting screw sheet 200 to tear it off, whereas in this embodiment, the connecting screw sheet 200 is directly cut by the sheet-cutting blade 172A.

[0054] Although the present invention has been described above using the embodiments as examples, the present invention is not limited to the embodiments. Various modifications can be made to the details specifically described in the embodiments within the scope of the claims.

[0055] The left-right relationship of the recess 118, the sheet cutting protrusion 172, and the winding direction of the connecting screw sheet 200 in the screw feed mechanism exemplified in the embodiment may be reversed. That is, the recess 118 may be provided on the left side of the slider 112, the connecting screw sheet 200 may be ejected to the left, and the connecting screw sheet 200 may be pulled to the right when it is cut. [Explanation of symbols]

[0056] 1...working machine, 10...housing, 11...body portion, 12...handle portion, 13...battery pack mounting portion, 14...gear case, 15...trigger switch, 17...battery pack mounting portion, 20...motor, 31...reduction mechanism, 32...clutch mechanism, 33...clutch spring, 35...spindle, 40...magazine, 101...connecting portion, 102...casing, 103...protector, 104...screw tightening depth adjustment cam, 105...ball, 106...screw Tightening depth adjustment dial, 107...O-ring, 108...washer, 109...screw, 110...bit, 111...slider spring, 112...slider, 113...left slider, 114...right slider, 115...stopper extension member, 116...cam groove, 117...notch, 118...recess, 119...sheet insertion port, 120...lever support shaft, 121...button, 122...spring, 123...through hole, 124...sheet discharge port, 125...sheet Feeder, 126...sheet feed claw, 127...projection, 128...spring, 129...sheet feeder support portion, 130...shaft, 131...lever, 132...roller, 133...screw, 134...through hole, 135...pin protrusion base portion, 136...cover, 137...screw, 138...long hole, 145...sheet holding member, 146...sheet holding claw, 147...projection, 148...spring, 149...sheet holding member support portion, 150...shaft, 154...bit gauge Guide, 155...release lever, 160...stopper, 161...long hole, 162...shaft, 163...spring, 164...screw guide, 165...retaining ring, 166...nose cap, 171...long hole, 172...sheet cutting protrusion (sheet engagement portion), 172A...sheet cutting blade (sheet engagement portion), 173...sheet guide protrusion, 174...inclined surface, 190...wall, 191...ceiling, 200...connecting screw sheet, 201...engagement hole, 210...screw.

Claims

1. A work machine equipped with a screw feed mechanism that feeds a connected screw sheet that holds a large number of screws in parallel and supplies the screws one by one to a tightening position from below, the screw feed mechanism has a slider having a sheet discharge port for discharging the connecting screw sheet; The slider has a recess on its top surface, the sheet discharge port opens into the recess, The recess is open in a first direction, which is one of the left and right directions, and is configured to allow the connecting screw sheet discharged from the sheet discharge port to be discharged in the first direction. A work machine characterized by:

2. The work machine according to claim 1, the slider has a seat engaging portion that can engage with an engaging hole of the connecting screw seat, the sheet engaging portion is provided in a position near the sheet discharge port so as not to protrude above the upper surface portion of the slider; A work machine characterized by:

3. The work machine according to claim 1, The connecting screw sheet is unwound from a roll state, When the connecting screw sheet discharged from the sheet discharge port is bent in the winding direction in the rolled state, the connecting screw sheet is tilted toward the first direction. A work machine characterized by:

4. The work machine according to claim 1, The screw feed mechanism includes: a casing provided behind the slider; and a biasing means for biasing the slider forward relative to the casing, the casing has a notch that exposes the recess of the slider that has retracted into the casing; A work machine characterized by:

5. A work machine equipped with a screw feed mechanism that feeds a connected screw sheet that holds a large number of screws in parallel and supplies the screws one by one to a tightening position from below, the screw feed mechanism has a slider having a sheet discharge port for discharging the connecting screw sheet; the slider has a seat engaging portion that can engage with an engaging hole of the connecting screw seat, the sheet engaging portion is provided in a position near the sheet discharge port so as not to protrude above an upper surface of the slider; A work machine characterized by:

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