JP5272539B2 - Screwing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw fastening machine that can accurately position a screw to a hole of a joint metal fitting stopper or the like before starting fastening, and can reliably feed a joint screw pitch by one pitch by a simple constitution. <P>SOLUTION: The screw fastening machine includes: a power tool 2 for rotating a driver bit 3; an adaptor 4; a nose 5 extendedly mounted to the adaptor 4; and a magazine 6 mounted to the lateral side of the nose 5, wherein the magazine 6 is obliquely mounted so as to be positioned more rearward as receding from the nose 5, the magazine 6 has a plurality of screws 71 whose tips are obliquely lined up, the forefront screw is positioned on the axis line of the driver bit 3, and the tip of the forefront screw is protruded from the tip of the nose 5. The magazine 6 is equipped with a slider 9 movable longitudinally in the direction of the magazine, and guide mechanisms (90, 43) mounted between the slider 9 and the adaptor 4 feed a screw's joint strap pitch by one pitch by taking advantage of the relative movement of the guide mechanisms. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention uses a screw connection band connection screw in which a plurality of screws are connected at equal intervals made of resin, and presses the power tool portion toward the screw tightening material and reciprocates it back to return the connection screw. The present invention relates to a screw tightening machine having a feed mechanism for feeding.

  Patent Document 1 discloses a screw tightening machine that feeds and tightens a connecting screw onto a driver bit shaft by pressing and returning a power tool portion in the direction of a screw tightening material. This is done by using a tape connecting screw 200 as shown in FIG. 14 and applying a sprocket wheel provided on the tip side of the nose portion to the notch portion 208 while the power tool portion is pressed and moved in the direction of the screw tightening material. The screw is rotated by a pitch and the screw of the resin screw connection band 205 is fed onto the driver bit shaft to tighten the screw. In this conventional configuration, when the power tool portion is started to be pressed in the direction of the screw to be tightened, the screw is not positioned on the driver bit shaft, so that it is difficult to position the tip of the screw, aiming at the hole of the joint metal fitting. It was difficult to tighten the screws.

  Therefore, the technology that sends the screw at the time of return after pressing the power tool part in the direction of the screw tightening material, presses the next power tool part, and makes the screw on the driver bit shaft before starting the operation is a patent document. 2 and Patent Document 3. In these technologies, the ratchet or sprocket wheel provided on the tip of the nose part is rotated by one pitch during the return movement after pressing the power tool part in the direction of the screw fastening material, and the screw of the resin screw connection band is It is the structure which feeds on a driver bit axis | shaft. In particular, in Patent Document 3, before the start of the pressing operation of the power tool part, the screw tip protrudes from the tip of the nose part and is set, so that the screwing position can be accurately recognized.

U.S. Pat. Japanese Utility Model Publication No.57-140972 JP-A-7-266248

  In the conventional example, connection screw feed is performed by rotation of a ratchet or a sprocket wheel. Therefore, the connection band of the connection screw is in the form of a flat tape, the vicinity of the screw head is supported by the resin connection band, and the sprocket claw is hooked to the notches on both sides of the connection band and sent. The connection band of the screw of Patent Document 3 is a connection band whose cross section is folded into a square shape, but since the cross section is low, the substantial action is close to that of a flat tape.

  In the conventional example, the screw connection band is a flat tape or a shape close to a flat tape, and is locked and held by a claw such as a sprocket wheel. There is a problem that the screw tip position is tilted from the screwdriver bit axis due to the weight, and the screw tip is difficult to position without being stabilized. In addition, although the flat tape-shaped connection band and the screw are firmly connected, these screws are commercially available in a connected state, and the operator must manually use the loose screw in the connection band. I couldn't. That is, there is a limitation in that the screw used in this type of screw tightening machine is limited, and the screw cost is increased.

  An object of the present invention is to provide an easy-to-use screw tightening machine that can accurately position a screw in a hole such as a joint fitting before starting screw tightening.

  Another object of the present invention is to provide a screw tightening machine that can reliably feed connection screws one pitch at a time with a simple configuration.

  Still another object of the present invention is to provide a screw tightening machine that allows an operator to easily set a connecting band even if it is a general-purpose screw.

  Of the inventions disclosed in the present application, typical features will be described as follows.

  According to one aspect of the present invention, a power tool part for rotating a driver bit, an adapter part attached to the power tool part, a nose part attached to the adapter part so as to be extendable in the axial direction, and fixed to the nose part In a screw tightening machine having a magazine portion that feeds a screw that is latched and held by a screw connection band onto the axis of a driver bit of the nose portion, the nose portion is positioned so that the magazine portion is located rearward as it moves away from the nose portion It is attached diagonally to the magazine, and is arranged by a screw coupling band so that the tip of the screw is diagonally aligned on the magazine, and the leading screw is held on the axis of the driver bit so that the tip protrudes from the tip of the nose, A slider part movable in the longitudinal direction of the part is provided in the magazine part, and the slider part is located between the slider part and the adapter part. And configured to move the screw strip by utilizing the relative movement of vignetting the guide mechanism.

  According to another feature of the present invention, the screw connection band is made of, for example, an elastic resin, has two lips that are held at positions separated from each other in the axial direction of the screw, and is fixed to a plurality of screw tips. The screw is held at a constant interval so that the line connecting the two is inclined with respect to the axis of the screw. The slider has a feed claw for feeding the screw connection band by 1 pitch. The feed claw moves backward by 1 pitch with respect to the screw feed direction when the power tool is pressed, and advances by 1 pitch when the power tool is pushed back. Let The guide mechanism is a cam groove formed in the slider portion and a cam roller provided in the adapter portion and guided in the cam groove. Alternatively, the guide mechanism may be a cam roller that is guided by a cam groove provided in the adapter portion and a cam groove formed in the slider portion.

  According to still another feature of the present invention, the cam groove is a substantially parallelogram-shaped groove so that the cam roller follows a groove in a separate stroke when the power tool is pressed and when the power tool is pushed back. The feed claw is configured to move backward when the power tool is pushed back. An opening hole is formed in the nose portion for discharging the connecting band portion that has secured the fastened screw. The screw connection band is made of an elastic resin, locks each screw with two lips separated in the axial direction of the screw, and holds and connects a plurality of screws at a constant interval with adjacent screws, A notch is provided between the lips of adjacent screws.

According to the first aspect of the present invention, the magazine portion is obliquely attached to the nose portion so as to be located rearward as it is separated from the nose portion, and the magazine portion is disposed by the screw connection band so that the screw tips are obliquely aligned. Since the top screw is held on the axis of the driver bit so that the tip protrudes from the tip of the nose part, a screw tightening machine that can accurately position the screw in the hole for fastening the joint bracket etc. before starting the screw tightening realizable. In addition, the magazine portion is provided with a slider portion that is movable in the longitudinal direction, and the screw connection band can be moved by utilizing the relative movement of the guide mechanism provided between the slider portion and the adapter portion. Therefore, it is possible to realize a mechanism for automatically pitch-feeding the connecting screw in the screw tightening machine in which the magazine portion is attached obliquely. Further, the guide mechanism guides the cam groove formed in the slider portion and the cam roller provided in the adapter portion and guided in the cam groove, or the cam groove provided in the adapter portion and the cam groove formed in the slider portion. Therefore, the connecting screw pitch feed mechanism can be realized with a simple structure and at a low cost.

  According to the invention of claim 2, since the screw connection band is held by the two lips held at positions separated from each other in the axial direction of the screw, the screw can be stably connected even when a relatively long screw is used. Can be held in a band. Furthermore, since it is stably held by the connecting band, it is possible to reduce the occurrence of blurring when the tip of the screw is positioned in a hole such as a joint fitting before starting screw tightening, and to perform accurate tightening. it can.

  According to the invention of claim 3, the slider portion has a feed claw for feeding the screw coupling band by one pitch, and the feed claw is retracted by one pitch with respect to the screw feed direction when the power tool is pressed, and the power tool is pushed back. Since the screw connection band is sometimes moved forward by one pitch, it is possible to realize a mechanism for automatically feeding the connection screw by using the movement of the slider portion.

According to the invention of claim 4 , the cam groove is a substantially parallelogram-shaped groove so that the cam roller follows the groove in a separate stroke when the power tool is pressed and when the power tool is pushed back. Since the feed claw is moved forward when the power tool is pushed back, it is possible to realize a pitch feed mechanism of the connection screw adjusted so that the connection screw is advanced by one pitch after the driver bit is securely pulled.

According to the fifth aspect of the present invention, since the nose portion is formed with the opening hole for discharging the connecting band portion where the fastened screw is fixed, a smooth feed mechanism of the connecting screw can be realized.

According to the invention of claim 6 , the screw connection band is made of an elastic resin, and each screw is locked by two lips separated in the axial direction of the screw, and a plurality of screws are spaced apart from the adjacent screws. Is held and connected, so that even if it is a general-purpose screw, the operator can easily set it to the connecting band, so that the restriction on the screw to be used is reduced. Moreover, since the notch is provided between the lips of the adjacent screws, the connecting screw can be surely pitch-fed by the feed claws.

  The above and other objects and novel features of the present invention will become apparent from the following description and drawings.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof will be omitted. Further, in this specification, unless otherwise specified, the directions indicated by the arrows in FIG.

  FIG. 1 is an overall view of a screw tightening machine according to an embodiment of the present invention, and a part thereof is shown in a longitudinal section. In FIG. 1, the screw tightener 1 is roughly divided into a power tool 2 such as a driver, a driver bit 3 removably attached to the power tool 2 with a screw 32, and a power tool 2 extending so as to cover the driver bit 3. A cylindrical adapter part 4 to be attached, a nose part 5 which is guided by the adapter part 4 and attached to the tip of the adapter part 4 so as to be extendable and contracted, and a magazine part which is fixed to the nose part 5 and feeds the connecting screw 7 6. A slider portion 9 is attached to the magazine portion 6 so as to be relatively movable. A protrusion 41 is formed below the adapter portion 4.

  FIG. 2 is a view for explaining the movement of the nose portion 5, the magazine portion 6, and the slider portion 9 of FIG. In FIG. 2A, the nose part 5 and the magazine part 6 fixed to the nose part 5 are movable in the direction of the arrow 21 with respect to the adapter part 4. In the initial state, the nose portion 5 is biased forward by the spring 31. The rearward movement of the nose portion 5 is performed against the compressive force of the spring 31 when the operator presses the power tool 2 forward. As can be understood from FIG. 2, the magazine portion 6 is obliquely attached to the nose portion so that the magazine portion 6 is positioned rearward as it is separated from the nose portion 5, and the longitudinal center line of the magazine portion 6 is the central axis of the driver bit 3. On the other hand, it is fixed not to be vertical but to be inclined at a predetermined angle.

  FIG. 2 (2) shows the moving direction of the slider portion 9, and the slider portion 9 is movable in the longitudinal direction as indicated by an arrow 22 with respect to the magazine portion 6. In the present specification, the longitudinal direction 23 of the magazine portion 6 is offset with respect to the vertical direction, and the magazine portion 6 is attached obliquely so as to be located rearward as the distance from the nose portion 5 increases. It arrange | positions so that the front-end | tip of the screw 71 may be located diagonally. However, since the vertical direction and the longitudinal direction 23 are not exactly the same but are the same in direction, in the present embodiment, the movement direction of the slider portion 9 will be described as the vertical direction, assuming that they are substantially synonymous.

  The movement of the slider portion 9 in the vertical direction is caused by movement of a guide mechanism formed in the slider portion 9, that is, the cam groove 90 and the cam roller 43 (FIG. 1), and the nose portion 5 contracted by the operator. Is moved by utilizing the return force when returning to the original position by the action of the spring 31. By utilizing the upward movement of the slider portion 9, a connecting screw 7 described later is moved upward by one pitch. What is characteristic in the present embodiment is that when the slider portion 9 moves downward with respect to the magazine portion 6, the connecting screw 7 is not moved downward, and the slider portion 9 moves upward. The connecting screw 7 is configured to be moved upward by one pitch (the distance between adjacent screws). The details of the configuration in which the slider portion 9 moves the connecting screw 7 only in one direction will be described later.

  In FIG. 1, the magazine section 6 attached to the nose section 5 is fixed so that the longitudinal center line of the magazine section 6 is not perpendicular to the center axis of the driver bit 3 but is inclined at a predetermined angle. The magazine portion 6 is provided with a magazine upper frame 61, a magazine middle frame 62, and a magazine lower frame 63, and the connecting screw 7 is moved upward by being guided by these frames. The slider portion 9 is guided by the magazine upper frame 61, the magazine middle frame 62, and the magazine lower frame 63, and is attached to be movable in the longitudinal direction of the magazine portion 6. An opening hole 52 is provided above the nose portion 5.

  The slider portion 9 is provided with a cam groove 90 having four inflection portions 90a, 90b, 90c and 90d (see FIG. 2 (2)) which guide the cam roller 43 and whose central axis locus is a substantially parallelogram. . The inflection part 90a becomes the initial position (referred to as top dead center) of the cam roller 43, and the inflection part 90c becomes the lowest point position (referred to as bottom dead center) of the cam roller 43. The axial distance (front-rear direction distance) of the driver bit 3 between the top dead center inflection portion 90a and the bottom dead center inflection portion 90c is the pressing stroke of the power tool 2, that is, the movement stroke in the direction of the arrow 21. . The inflection part 90b is on the side close to the inflection part 90c between the inflection part 90a and the inflection part 90c, and the inflection part 90d is between the inflection part 90c and the inflection part 90a. It is arranged on the side close to. The distance between the center axis of the process between the inflection part 90a and the inflection part 90b parallel to the driver bit 3 axis and the center axis of the process between the inflection part 90c and the inflection part 90d is one pitch of the connecting screw 7. It is an interval.

  FIG. 3 is a cross-sectional view of the AA portion of FIG. 1 and a front view of the AA portion. The protruding part 41 is manufactured integrally with the adapter part 4. A cam shaft 42 is formed on a part of the protruding portion 41, and a cam roller 43 is pivotally supported on the cam shaft 42. The outer diameter of the cam roller 43 has a size corresponding to the width of the cam groove 90, and the cam roller 43 can smoothly rotate along the cam groove 90 formed in the slider portion 9. As can be understood from this drawing, the magazine portion 6 is provided on the opposite side (right side in the drawing) to the openable / closable cover 64 for covering the set connecting screw 7.

  FIG. 4 is a cross-sectional view of the BB portion of FIG. 1 and a front view of the BB portion. In the BB portion, screw heads 71a of a plurality of screws 71 connected by the upper lip 75b of the connection band 75 are arranged obliquely. A feed claw 8 having a convex portion 8a is biased by a spring 82 at a position facing the connecting screw 7 on the magazine portion 6 side of the slider portion 9, and is provided so as to be swingable about a shaft 83 as a fulcrum. The convex portion 8a is formed on the magazine portion 6 side of the screw head 71a of the head screw (the uppermost screw in the figure) set on the axis of the driver bit 3 in the hole 51 (see FIG. 1) of the nose portion 5. It becomes a guide wall and is located in the notch 78 of the resin screw connection band 75 between the second screw 71 and plays the role of positioning the connection screw 7.

  FIG. 5 is a cross-sectional view taken along the line CC in FIG. 1 and a top view from the line CC. A connecting screw 7 guided by a magazine upper frame 61, a magazine middle frame 62, a magazine lower frame 63 and an openable / closable cover 64 is arranged in the magazine unit 6 along the longitudinal direction of the magazine unit 6. A holding plate 96 disposed in a step portion formed in the magazine inner frame 62 and the magazine lower frame 63 is fixed to the slider portion 9 by screws or the like (not shown). With this configuration, the slider portion 9 is fixed to the magazine portion 6. It becomes possible to move relatively.

  As shown in FIG. 6, the connection screw 7 is inserted and locked in the recessed cut grooves of the two upper lips 75 a and the lower lip 75 b that are largely separated in the screw axis direction of the screw connection band 75. Concave cut grooves are formed so as to be inclined at a predetermined angle with respect to a vertical line with respect to the longitudinal direction of the connecting band 75 and to be held at equal intervals. The present embodiment is characterized in that the upper lip 75a and the lower lip 75b of the connecting band 75 hold the screw 71 at two locations that are largely separated in the axial direction of the screw 71. Moreover, since the screw 70 is inserted and held in the concave cut grooves of the lips 75a and 75b of the connection band 75, a screw screw can be easily incorporated even if it is not a screw manufacturer, and the range of the used screw is widened and the working efficiency is improved. .

  A notch 78 is provided between the lips with the adjacent recessed cut groove. The screw connection band 75 is made of, for example, a soft and elastic resin, and a plurality of holes 79 are provided on the side surface at every pitch. The hole 79 is a position to be hooked with a small protrusion (not shown) provided on the surface of the connecting screw 7 of the cover 64 when the connecting screw 7 is loaded in the regular position of the magazine 6 and the cover 64 is closed. Yes. For example, the small protrusion has a right-angled triangle cross section, and has a shape that allows upward movement (forward movement) of the screw connection band 75 but does not allow downward movement (reverse movement).

  When the leading connecting screw 7 is loaded into the regular position (tightening position) of the magazine 6 part, the screw 71 is arranged in the hole 51 of the nose part 5 on the axis of the driver bit 3. The point to be noted here is that, in this embodiment, the tip of the leading screw 71 to be tightened is protruded and held from the nose tip 53 as shown in FIG. Thus, since the tip of the leading screw 71 protrudes, the operator can visually recognize the leading end of the leading screw 71 before tightening, so that positioning becomes easy. Further, in the state before tightening shown in FIG. 1, the top (uppermost) screw 71 is held by the concave cut grooves of the upper lip 75 a and the lower lip 75 b that are greatly separated in the screw axis direction of the screw connection band 75. Therefore, even if the overall length of the screw 71 is relatively long, it can be stably held, so that the positioning accuracy is improved.

  Next, the operation | movement at the time of the screw fastening in this embodiment is demonstrated using FIG.1 and FIG.7 ~ FIG.10. In FIG. 1, the operator positions the tip of the leading screw 71 in the hole 100 a of the joint fitting 100, presses it against the insertion work 120, and turns on the power tool 2. Then, the driver bit 3 starts to rotate. The worker presses the power tool 2 forward against the urging force of the spring 31 in this state. Then, since the screw head 71a of the screw 71 is in the immediate vicinity of the tip of the driver bit 3, the recess of the screw head 71a and the tip of the driver bit 3 immediately mesh with each other, and the screw 71 starts to rotate. If the power tool 2 is further pushed forward as it is, the screw 71 is screwed into the work 120 by the lead of the screw thread while being detached from the upper lip 75a and the lower lip 75b of the resin screw connection band 75. In the present embodiment, since the upper lip 75a and the lower lip 75b hold the screw 71 at two locations that are largely separated from each other, the screw tip position is stable, and there is no blurring during tightening.

  FIG. 7 is a view for explaining a tightening operation by the screw tightening machine 1 of the present invention, and shows a state during tightening of the screw 71. As shown in FIG. 7, the slider portion 9 and the feed claw 8 (see FIG. 4) remain in the same position as the initial position until the cam roller 43 comes to the inflection portion 90 b of the cam groove 90. The screw 71 is screwed in by a distance between the inflection portions 90a and 90b of the cam groove 90. When the operator presses the power tool 2 forward until the cam roller 43 passes the inflection portion 90b of the cam groove 90, the contact surface from the inflection portion 90b of the cam groove 90 to the inflection portion 90c by the cam roller 43. The slider portion 9 is moved downward by this force. At this time, since the connecting screw 7 cannot be moved downward by the small protrusion of the cover 64, the feeding claw 8 on the slider portion 9 has a convex portion 8a having a screw head 71a of the screw 71 and an upper lip 75a of the connecting band 75, Along the outer edge of the lower lip 75b, the lower lip 75b moves downward while detaching from the notch 78 of the connecting band 75 so as to swing against the urging force of the spring 82.

  In addition, if the convex part 8a comes off from the notch part 78 of the connection band 75, the effect | action which fixes the connection band 75 will reduce, but the inflection part 90b presses the power tool 2 so that it may understand from the state of FIG. Since the stroke is near the bottom dead center and the screw 71 is screwed in more than half, there is no problem because it is no longer necessary to guide the screw head 71a.

  When the power tool 2 continues to be pushed forward, the slider portion 9 moves downward, and the cam roller 43 comes to the inflection portion 90c of the cam groove 90 as shown in FIG. When the dead point is reached, the screw 71 is screwed in for the entire depth until the screw head 71a contacts the surface of the joint fitting 100. At this position, the slider portion 9 and the feed claw 8 are moved downward by one pitch of the connecting screw 7, and the convex portion 8a of the feed claw 8 is pushed by the biasing force of the spring 82, so that the second screw 71- Fully enter the notch 78 between the second and third screws 71-3.

  After the screw 71 has been screwed in, the operator turns off the power tool 2 and releases the pressing of the power tool 2 forward. FIG. 9 is a diagram illustrating a state in which the power tool 2 is being pulled back by the restoring force of the spring 31 after the pressing is released. Until the power tool 2 is pulled back and the cam roller 43 comes to the inflection portion 90d of the cam groove 90, the slider portion 9 does not move in the vertical direction, so the feed claw 8 does not move and remains at the same position. . The driver bit 3 is pulled back by the distance between the inflection portion 90c and the inflection portion 90d of the cam groove 90.

  Further, when the operator continues to pull back the power tool 2 and the cam roller 43 passes the inflection portion 90d of the cam groove 90, the cam roller 43 makes contact between the inflection point 90d of the cam groove 90 and the inflection point 90a. The surface is pushed, and the slider portion 9 is moved upward by this pressing force. Since the connecting screw 7 can only move upward, the convex portion 8a of the feed claw 8 on the slider portion 9 enters the notch between the second screw 71-2 and the third screw 71-3. Move upward. As a result, the second connecting screw 71-2 is fed upward. At this time, the lip portion which has been tightened and is emptied of the connection band 75 is discharged out of the opening hole 52. The inflection portion 90d is near the top dead center of the return stroke of the power tool 2, and the driver bit 3 has returned to the vicinity of the upper edge of the connection band 75. In other words, the convex portion 8a of the feed claw 8 can feed the connecting screw smoothly.

  Further, the power tool 2 continues to be pulled back, and when the cam roller 43 reaches the inflection angle 90a of the cam groove 90 as shown in FIG. 10, the top dead center of the moving stroke of the power tool 2 is reached and shown in FIG. Return to the initial position.

  As described above, by the series of operations shown in FIGS. 7 to 10, the connecting screw 7 is fed upward by one pitch, and the connecting band 75 of the portion where the screw 71 that has been tightened is held is held in the nose. Set above the axis of the driver bit 3 in a state where the tip of the second screw 71-2 protrudes from the hole 52 of the part 5 and the next screw tightening is possible.

  Next, a second embodiment will be described with reference to FIGS. In FIG. 11, what is different from the first embodiment shown in FIG. 1 is the arrangement relationship between the cam groove and the cam roller. That is, the cam groove 90 is formed in the slider portion 9 and the cam roller 43 is formed in the protruding portion 41 in FIG. 1, whereas the cam groove 46 is provided in the protruding portion 44 in FIG. The cam roller 94 is provided on the slider portion 92. The cam groove 46 has a substantially parallelogram shape having four inflection portions 46a, 46b, 46c and 46d, as in the embodiment shown in FIG. In the case of the second embodiment, there is an advantage that the slider portion 92 that reciprocates in the vertical direction can be reduced, and the moving load can be reduced.

  FIG. 12 is a cross-sectional view of the DD portion of FIG. 11 and a front view of the DD portion. The arrangement and operation of the feeding claw 8 and the convex portion 8a provided in the slider portion 92 are the same as in the example shown in FIG.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 13 is a longitudinal sectional view of a main part of the screw tightening machine according to the third embodiment of the present invention. In the third embodiment, the inflection portions 96b and 96c of the cam groove 96 are arranged on the side close to the top dead center so that the cam roller 43 follows the same path during the pressing stroke and the return stroke of the power tool 2. did. With this configuration, the manufacturing cost of the cam groove 96 can be reduced. In this case, when the power tool 2 is pressed, the tip of the screw 71 is positioned in the hole 100a of the joint fitting 100, and the recess of the screw head 71a is in close proximity to the tip of the driver bit 3 so that it immediately meshes. Even without the guide 8a, the screw 71 does not come off and tilt. When the power tool 2 is returned, the feed claw 8 advances slightly earlier than the structure of FIG. 1 and the connecting band interferes with the driver bit 3, but this interference can be set in a range where there is no problem.

  ADVANTAGE OF THE INVENTION According to this invention, before the start of screw fastening, a screw can be accurately positioned in holes, such as a joining metal fitting stop, and an easy-to-use screw fastening machine can be provided. Further, by using the restoring force of the spring 31, it is possible to realize a screw tightening machine that can reliably feed the connecting screws one pitch at a time with a simple configuration. Furthermore, if it is a connection band demonstrated by this embodiment, even if it is a general purpose screw, since an operator can set easily to a connection band, the restriction | limiting of the screw to be used decreases.

  The invention made by the present inventor has been specifically described based on the embodiment of the screw tightening machine. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. Is possible. For example, in the above-described embodiment, an example in which an electric tool is used as a power tool has been described. However, the present invention is not limited to an electric tool, and an air tool powered by air, an engine tool, or the like can also be used. is there. Furthermore, in the above-described embodiment, the example in which the driver bit 3 having a cross at the tip and a cross screw is used has been described. However, the driver bit and the material to be fastened are not limited to these combinations, and drivers of other shapes are used. Needless to say, bits, screws, bolts and the like can be used.

  In this embodiment, the connecting screw 7 uses a resin connecting band having a U-shaped cross section, but the shape of the connecting band is not limited to the U-shaped, and the upper and lower sides of the slider portion 9 are As long as the screw 71 can be fed by the feed claw 8 according to the movement in the direction, a connecting band of any shape can be used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is a figure for demonstrating the motion of the nose part 5, the magazine part 6, and the slider part 9 of FIG. FIG. 2 is a cross-sectional view of the AA portion in FIG. 1 and a front view from the AA portion. It is sectional drawing of the BB part of FIG. 1, and the figure which looked ahead from the BB part. It is the sectional view of CC section of Drawing 1, and the figure which looked at the upper part from CC section. It is a perspective view which shows the connection screw 7 of FIG. It is a figure for demonstrating the fastening operation | movement by the screw fastening machine of this invention, and is a figure which shows the state in the middle of the fastening of the screw | thread 71. FIG. It is a figure for demonstrating the fastening operation | movement by the screw fastening machine of this invention, and is a figure which shows the state in the middle of the pulling-back of the power tool 2. FIG. It is a figure for demonstrating the fastening operation | movement by the screw fastening machine of this invention (the 3). It is a figure for demonstrating the fastening operation | movement by the screw fastening machine of this invention (the 4). It is a general view of the screw fastening machine 11 which concerns on 2nd embodiment of this invention, and the longitudinal cross-section is shown in part. It is the sectional view of DD section of Drawing 11, and the figure which looked at the front from DD section. It is a longitudinal cross-sectional view of the principal part of the screwing machine which concerns on 3rd embodiment of this invention. It is a perspective view which shows the external appearance of the connection screw used for the conventional screwing machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Screwing machine 2 Power tool 3 Driver bit 4 Adapter part 5 Nose part 6 Magazine part 7 Connecting screw 8 Feeding claw 8a (Feeding) convex part 9 Slider part 31 Spring 41, 44 (Adapter part) Protrusion part 42 Cam shaft 43 Cam roller 46 Cam groove 46a, 46b, 46c, 46d (cam groove) inflection 51 hole 52 opening hole 53 nose tip 61 magazine upper frame 62 magazine middle frame 63 magazine lower frame 64 cover 71 screw 71a screw Head 75 Connection band 75a Upper lip 75b (of connection band) Lower lip 78 (of connection band) Notch 82 Spring 90, 91 Cam grooves 90a, 90b, 90c, 90d Inflection parts 91a, 91b (of cam groove), 91c, 91d Inflection portion (of cam groove) 92 Slider portion 93 Cam shaft 94 Cam roller 95 Slider portion

Claims (6)

A power tool for rotating the driver bit;
An adapter part attached to the power tool part;
A nose portion that is attached so as to extend and contract in the axial direction from the tip of the adapter portion;
In the screw tightening machine having a magazine portion that feeds the screw fixed to the nose portion and held by the screw connection band onto the axis of the driver bit of the nose portion,
The magazine portion is obliquely attached to the nose portion so as to be positioned rearward as it is separated from the nose portion, and the magazine portion is disposed by the screw coupling band so that the tip ends of the screws are obliquely arranged. Is held so that the tip protrudes from the tip of the nose portion on the axis of the driver bit,
A slider part movable in the longitudinal direction of the magazine part is provided in the magazine part,
The slider part moves the screw connection band by using a relative movement of a guide mechanism provided between the slider part and the adapter part ,
The guide mechanism includes a cam groove formed on one of the slider part or the adapter part and a cam roller formed on the other, and the cam roller is guided by the cam groove. Machine. The screw coupling band has two lips that are held at positions separated from each other in the axial direction of the screw, and the line connecting the tips of the plurality of screws to be fixed is inclined with respect to the axis of the screw. The screw tightening machine according to claim 1, wherein the screw is held at a constant interval.   The slider portion has a feed claw for feeding the screw connection band by one pitch, and the feed claw is retracted by one pitch with respect to the screw feed direction when the power tool is pressed, and the screw connection is made when the power tool is pushed back. The screw tightening machine according to claim 2, wherein the belt is advanced by one pitch. The cam groove is a substantially parallelogram-shaped groove, and the cam roller follows a groove in a separate stroke when the power tool is pressed and when the power tool is pressed back. The screw tightening machine according to claim 3 , wherein the feed claw is configured to advance when pushed back. The screw tightening machine according to any one of claims 1 to 4 , wherein an opening hole is formed in the nose portion to discharge a connecting band portion that has fixed a fastened screw.   The screw connection band is made of an elastic resin, and each screw is locked by two lips separated in the axial direction of the screw, and a plurality of screws are held and connected at a constant interval with adjacent screws. The screw tightening machine according to claim 2, wherein a notch is provided between lips of adjacent screws.

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