JPH0671069U - Screw driving tool - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a screw driving tool that can be screwed into an accurate position when screwing downward. [Structure] A metal fitting 21 is attached to the tip of the head 4 of the screw driving tool 1 so as to be rotatable rearward relative to the head 4 from a position in which the screw is screwed in.
By tilting the screw driving tool 1 rearward when screwing in, the head 4 can be escaped with respect to the line of sight from the upper side, and the screw passage hole 24 of the pressing metal fitting 21 can be aligned as viewed from the upper side. When the screw driving tool 1 is upright,
The screw A can be accurately screwed into a target position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screw driving tool in which screws can be continuously driven by using a tape in which screws are held at regular intervals.

[0002]

[Prior art]

 FIG. 4 shows an example of a screw driving tool 1 for screwing using a tape in which screws are held at regular intervals, and a cylindrical guide portion 3 in which a driver 2 is housed at the tip of a driver driving portion 1a equipped with a motor and the like. A head 4 having a bifurcated tip is attached to the guide portion 3 so as to be vertically movable along the long hole 5, and a spring 6 constantly biases the head 4 to return elasticity toward the tip side. At the same time, a tape holding portion 7 for horizontally supporting the tape B holding the screws A at constant intervals on the head 4 so as to be movable in the longitudinal direction, and a vertical movement of the guide portion 3 with respect to the head 4 An intermittent feed mechanism (not shown) that intermittently feeds the tape B at a pitch equal to the holding interval of the screw A, and is located at the tip of the head 4, and when the screw A is screwed in, presses against the portion to be screwed to position Provided with a metal fitting 8 It has become an elephant.

In this screw driving tool 1, the screw A located at the tip of the tape B held by the holding portion 7 of the head 4 is arranged coaxially with the driver 2, and the pressing metal fitting 8 is the portion to be screwed. When the driver 2 is rotated and pushed in, the driver 2 engages with the head groove of the screw A, applies a rotation and pushing force to the screw A to screw it in, and when the pushing is released, the tape is released. B is fed one pitch, and the next screwing is possible.

By the way, as shown in FIGS. 5 and 6, the pressing metal fitting 8 in the conventional screw driving tool is provided with a vertical mounting plate 10 having a bifurcated shape at the rear end of the horizontal abutting plate 9 so as to be L-shaped. The contact plate 9 is provided with a screw passage hole 11 for aligning the screw A of the screw A, and the mounting plate 10 is superposed on the rear surface of the front end of the head 4 and fixed by the screw 12. The screw passage hole 11 is located at the tip of the head 4 so that the screw passage hole 11 is located on the extension line of the axis of the driver 2.

When the screw A is screwed in, as shown in FIG. 5, the contact plate 9 of the pressing metal fitting 8 is superposed on the member C to be screwed in, and the screw passage hole 11 is coaxial with the screwed-in position. The screwing work is carried out with the positioning so made.

In the case where the screw A is screwed downward using the screw driving tool 1 as described above, for example, when fixing the roof tile material with screws, the worker pushes the screw driving tool 1 upright. It is necessary to take a posture of holding the position of the screw fitting and hold it at a position where the screw passing portion 11 of the pressing metal fitting 8 is seen from the upper side to align with the hole of the screwed portion.

[0007]

[Problems to be solved by the device]

 However, since the contact plate 8 is located close to the tip of the head 4 as shown in FIG. 4 and FIG. 5, the pressing metal fitting 8 is a screw driving tool with the screw driving tool 1 held upright. When the screw passing hole 11 is viewed from above 1, it is very difficult to check the screw passing hole 11 because the head 4 is in the way. Therefore, the screw passing hole 11 and the screw screwing position hole are different from each other. However, there is a problem that the screw A cannot be screwed into the correct position because the position of the screw A becomes inaccurate.

Therefore, an object of the present invention is to allow the head to escape rearward with respect to the screw passage hole of the pressing metal fitting when the screw is screwed downward, so that the screw passage hole and the screw screwing position hole are formed. It is an object of the present invention to provide a screw driving tool capable of easily checking the alignment and screwing the screw into an accurate position.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention adopts a structure in which the pressing metal fitting attached to the tip of the head can be rotated rearward relative to the head from the position in which the screw is screwed. is there.

[0010]

[Action]

 When the pressing metal fitting is brought into contact with the part to be screwed in and the entire screw driving tool is tilted rearward, the head moves rearward from directly above the pressing metal fitting and holds the tool. The operator can see the screw passage hole from the top, and the work of aligning the screw passage hole with the screw screwing hole can be reliably performed visually.After the alignment, return the screw driving tool to the upright state and screw it in. If you operate it, you can screw the screw into the correct position.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings. Note that the same parts as those of the screw driving tool 1 shown in FIG.

In FIG. 1 to FIG. 3, a pressing metal fitting 21 attached to the tip of the head 4 has a pair of mounting pieces 23, 23 standing on the rear end side upper surface of a contact plate 22 using a flat plate. The contact plate 22 has a screw passage hole 24.

The front end of the head 4 to which the pressing metal fitting 21 is attached is a forked portion 4 a, 4 a through which the screw A can pass in the front-rear direction, and the rear surface thereof extends vertically along the length of the guide portion 3. The face 25 is provided, and hinges 26, 26 for attaching the pressing fitting 21 are provided on the vertical face 25. The rear portion of the contact plate 22 is a protrusion 22a that protrudes rearward from the attachment pieces 23. The protrusion 22a is convenient for setting the position when the contact plate 22 is brought into contact with the screwed portion C.

The attachment pieces 23, 23 of the pressing metal fitting 21 are erected opposite to each other with a space circumscribing the both hinges 26, 26, and the attachment pieces 23, 23 are pivotally fixed to the hinges 26, 26 by a shaft 27. A pressing metal fitting 21 is attached to the head 4 so as to be rotatable around a shaft 27.

The attachment pieces 23, 23 are provided with contact surfaces 28 and 29 for restricting the posture of the pressing metal fitting 21 with respect to the head 4 in two modes by contacting the vertical surface 25 of the head 4. .

As shown in FIG. 2, when the screw driving tool 1 is held upright, the first contact surface 28 contacts the vertical surface 25 in a state where the contact plate 22 is horizontal, and the first contact surface 28 of the push-up metal fitting 21. It is formed on a vertical surface that restricts the forward rotation (clockwise direction in FIG. 2) and allows the backward rotation (counterclockwise direction in FIG. 2).

The second contact surface 29 is continuous with the upper portion of the first contact surface 28 and inclines rearward, and contacts the vertical surface 25 when the pressing fitting 21 is rotated rearward by a predetermined angle. Then, as shown in FIG. 1, the pressing metal fitting 21 is restricted from rotating rearward and is allowed to rotate forward.

When the pressing metal fitting 21 is brought into contact with the screwed-in portion C by mounting the pressing metal fitting 21 on the head 4 as described above, the screw driving tool 1 moves from the upright state of FIG. 1 can be tilted backward as shown in FIG. 1. For example, the screw driving tool 1 is tilted at an angle of 60 °. Since the pressing metal fitting 21 is pivotally fixed to the rear side by the shaft 27, when the screw driving tool 1 is lifted, the tip of the abutting plate 22 is inclined so as to descend.

The screw driving tool of the present invention has the above-described structure, and when screwing the screw A downward, first, the screw driving tool 1 is tilted rearward, and the pressing metal fitting 21 is moved by its own weight. With the second contact surface 29 in contact with the vertical surface 25 and the contact plate 22 so as to be substantially horizontal, the screw passage hole 24 of the contact plate 22 and the threaded portion of the roof tile material or the like. As shown in FIG. 1, while visually checking the hole C, the screw passage hole 24 is aligned with the hole of the screwed portion, and the contact plate 22 is brought into contact with the screwed portion C.

By tilting the screw driving tool 1 backward as described above, the head 4 is hindered by the operator X holding the screw driving tool 1 looking at the screw passage hole 24 from above. As a result, the work of aligning the screwed portion C of the screw passage hole 24 with the hole can be performed without any trouble.

When the screw passing hole 24 and the hole of the screwed portion C are aligned, the screw driving tool 1 may be raised forward as shown in FIG. 25 and the first contact surface 28 contact each other, the screw A standing upright on the contact plate 22 and positioned immediately below the driver 2 faces directly above the screw passage hole 24, and the screw tool 1 By performing the pushing operation, the screw A can be accurately screwed into the hole of the target screw-in portion C by the driver 2.

When the screw driving tool 1 is unscrewed after screwing the screw A, the tape portion B is fed by one pitch due to the rise of the guide portion 3 with respect to the head 4, and a new screw is positioned just below the driver so that the next screwing is performed. It will be possible.

The shape of the screw passage hole 24 provided in the abutting plate 22 of the pressing member 21 is not limited to the independent circular shape shown in the figure, and as shown by the one-dot chain line in FIG. Further, a line or a notch forming a cross shape may be provided around the screw passage hole 24 to further clarify the alignment.

Although not shown, the lower surface of the contact plate 22 may be formed as a rough surface so that a non-slip effect with respect to the screwed-in portion C may be produced.

[0025]

[Effect of device]

 As described above, according to the present invention, since the pressing metal fitting for the screw screwing portion is rotatably attached to the tip of the head of the screw driving tool, when the screw driving tool is used to screw the screw downward, The head can be released backward from above the metal fitting, and the screw passage hole of the pressure metal fitting can be surely aligned with the hole of the screwed part when viewed from the top. It can be precisely screwed into position.

Further, since the pressing metal fitting can be rotated rearward from the position of the screw-threaded posture with respect to the head, if the screw driving tool is set upright with respect to the pressing metal fitting, it will not be screwed. Since the screw faces the intended screwing position, the screw can be screwed in smoothly.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a screw driving tool according to the present invention, showing a rearward tilting state.

FIG. 2 is a vertical cross-sectional view of an essential part showing an upright state when screwing in the same as above.

FIG. 3 is an exploded perspective view showing a structure for attaching a pressing plate to a head.

FIG. 4 is a front view showing the overall structure of a screw driving tool.

FIG. 5 is a vertical sectional front view showing the structure of a conventional pressing metal fitting.

6 is a cross-sectional view taken along the arrow VI-VI in FIG.

[Explanation of symbols]

 1 Screw Driving Tool 2 Driver 3 Guide Part 4 Head 21 Pushing Metal Fitting 22 Contact Plate 23 Mounting Piece 24 Screw Passing Hole 25 Vertical Surface 26 Hinge 27 Shaft 28, 29 Contact Surface A Screw B Tape

Claims (1)

[Scope of utility model registration request] 1. A guide portion for accommodating a driver is provided at the tip of a driver driving portion, and a head attached to the tip of the guide portion holds a screw holding tape so as to intermittently feed it in the length direction, and a head is attached to a screw-threaded portion. With a screw driving tool in which the screw is screwed with a screwdriver while the tip pressing metal fitting is pressed, the pressing metal fitting attached to the tip of the head is rotated backwards from the position where the screw is screwed into the head. A screw driving tool characterized by being able to do so.