JP2003127069A - Multiattachment with ratchet for power screwdriver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop and provide a multiattachment with a ratchet for a power screwdriver which achieves utilization irrespective of the thread depth of an anchor bolt, easy and prompt work, and effective retightening and loosening work of a nut. SOLUTION: Gears 2, 3 and 4 meshed with each other in parallel are pivotally fitted on a frame body 1. Two types of holes, namely, four types in total for fitting a rotating shaft of a power screwdriver in one side of a gear and a nut to be tightened or loosened in a twin gear on the other side, is respectively provided on the surface and the back, wherein the hole is displaced from the rotating shaft of the power screwdriver. By locking and releasing a driving gear, rotation of a driven gear coupled with the driving gear is also locked or released, which leads to combined use of the multiattachment as a commercially available ratchet type monkey wrench. Therefore, a loosening difficulty caused by friction resistance in retightening and loosening a nut can be handled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ratchet multi-attachment for an electric screwdriver, which is used for tightening and loosening nuts screwed into bolts used in civil engineering and construction. is there.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a pneumatic or hydraulic impact wrench has been known for these operations, which is widely used for tightening nuts and the like.
The rotary shaft protruding from the main body is rotated by air pressure or hydraulic pressure to rotate the socket attached to the rotary shaft. As shown in FIG. 9, the socket is rod-shaped, and one end of the socket is Has a mounting hole to be attached to the rotary shaft of the main body and a nut hole to be fitted to the other end nut. Then, when used, the socket is replaced with a socket corresponding to the nut size, so that various sizes of nuts can be tightened.

However, in these instruments, the use is limited due to the screw depth of the anchor bolt, and a box wrench is used manually up to the position where it can be used, and the work is complicated and It took a lot of work time and was extremely inefficient.

[0004]

Therefore, the present invention is
Develops and provides a multi-attachment with ratchet for electric screwdrivers that can be used regardless of the screw depth of the anchor bolt, is easy and quick in work, and is efficient in tightening and loosening nuts. Especially.

[0005]

Therefore, as a means for solving this problem, the present invention provides a frame main body,
Gears that mesh in parallel are pivotally mounted, and one type of gears has a rotating shaft of an electric screwdriver, and the other two gears have holes for fitting nuts for tightening or loosening.
Type), the position of the hole and the position of the rotating shaft of the electric screwdriver are offset from each other, and further, by locking or unlocking the drive gear, the rotation of the driven gear connected to it is also locked. Or by releasing it, it can also be used as a ratchet type free spanner that is commercially available on the market, so it is possible to handle the tightening of the nut and the difficulty of loosening due to the frictional resistance when loosening it. Is.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 5, in which a rotary shaft (Y) of an electric screwdriver (Y) is centered on a frame main body (1).
a drive gear (2) having a connecting hole (2a) fitted in a)
The driven gear (3), which has a through hole (3a, 3b) into which the nut (A1, A2) is fitted and which meshes with the drive gear (2). The driven gear (4) is pivotally mounted, which meshes with the gear (3) and has through holes (4a, 4b) into which the nuts (A3, A4) are fitted and inserted,
The multi-attachment with ratchet for an electric driver is characterized in that the center axes of the gears (2), (3) and (4) are provided differently by a predetermined dimension (α).

The frame body (1) is constructed by fixing two plate members with a flat head screw (5) through a spacer (6), and between the plate members, the drive gear (2) and the The driven gears (3) and (4) are pivotally mounted in a state where three driven gears are continuously meshed with each other.

The drive gear (2) and the driven gear (3)
The center axis of each gear is different from that of (4) by a predetermined dimension (α), and the rotary shaft (Ya) of the electric screwdriver (Y) and the through holes (3a) of the driven gears (3) and (4) are provided.・ 3
b) Four types of nuts (A1), (A2), (A3), and (A4) that are fitted to (4a, 4b) [which is a box wrench] can be fitted and used according to the size of the mating nut.

Furthermore, the connecting hole (2a) of the drive gear (2)
As shown in FIG. 4 (C), according to the shape of the connecting shaft of the multi-attachment (see FIG. 11) of the electric screwdriver (Y), they are provided symmetrically on the front and back, and can be used on either the left or the right.

Further, a lock lever (7) is fixed to the middle of the two frames (1) by a spring pin (12),
Furthermore, the stopper (8) for fixing the lock lever (7)
By screwing, the rotations of the drive gear (2) and the driven gears (3) and (4) are switched to three stages of right rotation stop, neutral left and right rotation, and left rotation stop. By doing so, it can also be used as a ratchet type box wrench.

Further, the attachment of the handle portion (10) is
A steel bar member for fitting holes such as Shino is provided, and the member is sandwiched between two frame main bodies (1), and a bushing (9) is provided.
Then, the workability is improved by fitting the spring pin (13) and the spring pin (14).

The method of using the present invention will be described. First, as shown in FIGS. 8 and 9, when the nut (A1) is fastened to the anchor bolt of the concrete block (B), the ratchet is attached beforehand. Multi attachment (R)
The lock lever (7) is rotated clockwise to move the fixing stopper (8) upward to keep the neutral state, and the electric driver (Y) passes the driven gear (3) of the frame body (1). The nut (A1) is fitted into the hole (3a), and the shaft of the electric screwdriver (Y) is fitted into the connecting hole (2a) of the drive gear (2) for use.

Then, when the nut (A1) closed once is further tightened by using an electric screwdriver, the lock lever fixing stopper (8) of the ratchet multi-attachment (R) is rotated counterclockwise. Then, the lock lever (7) is moved downward, the lock lever (7) is switched to an arbitrary position, and the gear according to the size to be used is locked to perform the tightening.

Similarly, when loosening the nut (A1),
The lock lever (7) of the multi-attachment with ratchet (R) is arbitrarily switched to lock and use the gear according to the size to be used.

Also, depending on the situation of the work site, even if the nut bolt nut sizes (A1, A2) (A3, A4) differ, four types of through holes (3a, 3b) (4a, 4)
b) is installed on the front and back sides and adjacent to each other, and is used by fitting it into a through hole that matches the nut size.

Further, the direction of tightening and loosening the nut of the anchor bolt is such that the driven gear (3) and the driven gear (4) rotate.
Since and are opposite directions, the rotation direction switching button (Yb) of the electric screwdriver is operated each time to respond.

[0017]

According to the present invention, the frame body (1)
A drive gear (2) having a connecting hole (2a) fitted to the rotary shaft (Ya) of the electric screwdriver (Y) is pivotally attached to the center of the drive gear (2), and meshes with the drive gear (2) to provide a nut (A).・
B) through holes (3a, 3b) are inserted, the driven gear (3) is pivotally attached, and further meshes with the driven gear (3) to insert through the nuts (C, D). A driven gear (4) having 4a and 4b) is pivotally attached to each of these gears (2) and (3).
Since the center axes of (4) are different by a predetermined dimension (α), they can be used regardless of the screw depth of the anchor bolt, and the nut sizes of multiple (4 types) anchor bolts can be used. By providing through holes (3a, 3b) (4a, 4b) corresponding to (A, B, C, D) on the front and back sides and adjacently, work can be performed more easily and quickly, and work efficiency is improved.

Further, the lock lever (7) and the lock lever fixing stopper (8) are pivotally attached, and the rotations of the drive gear (2) and the driven gears (3) and (4) are stopped rightward. And, by turning to the left and right, which is neutral and freely rotatable, and switching to the left, it can also be used as a ratchet type box wrench, and by making the handle part (10) a bar steel member for aligning holes such as Shino. , Further improve workability.

Further, the handle and frame body (1) is
It consists of two plates with spacers (5) and (7),
In the meantime, since the drive gear (2) and the driven gears (3) and (4) are meshed with each other, the structure is simple and lightweight.
The cost can also be reduced.

Further, according to the present invention, the connecting holes of the drive gear (2) are of two kinds, large and small.
Since it is formed of a '), it has an extremely beneficial effect such that the socket of the existing impact wrench can be used.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a plan view,
(B) is a right side view.

2A and 2B show an embodiment of the present invention, FIG. 2A being a view taken in the direction of arrow f in FIG. 1, and FIG. 2B being a sectional view taken along line g-g in FIG.

FIG. 3 shows an embodiment of the present invention, which is taken along the line aa in FIG.
FIG.

4 shows an embodiment of the present invention, (A) is a sectional view taken along the line dd in FIG. 1, (B) is a sectional view taken along the line cc in FIG. 1, FIG.
(C) is a cross-sectional view taken along line bb in FIG. 1, and (D) is shown in FIG.
hh sectional view, (E) is a sectional view taken along line ii in FIG.
(F) It is ee sectional drawing in FIG.

5A and 5B show an embodiment of the present invention, in which FIG. 5A is a neutral state diagram in which the lock lever is rotatable left and right, FIG. It is a stopped state figure.

6A and 6B are views showing a use state at the time of loosening a nut of the present invention, in which FIG. 6A is a plan view and FIG. 6B is a front view.

7A and 7B are views showing a use state at the time of tightening the nut according to the present invention, in which FIG. 7A is a plan view and FIG. 7B is a front view.

FIG. 8 is a plan view showing a use state of the present invention by an electric screwdriver.

FIG. 9 is a side view showing a usage state of the present invention by an electric screwdriver.

FIG. 10 is a side view of an impact wrench conventionally used.

FIG. 11 is a socket of a conventionally used impact wrench, (A) is a front view, (B) is a left side view, and (C).
Is a right side view.

[Explanation of symbols]

1 frame body 2 drive gear 2a connecting hole 3 driven gear 3a through hole 3b through hole 4 driven gear 4a through hole 4b through hole 5 spacer 6 countersunk nut 7 lock lever 8 lock lever fixing stopper 9 bushing 10 handle portion 11 spring 12 spring pin 13 spring pin 14 spring pin A1 nut A2 nut A3 nut A4 nut B concrete block Y electric screwdriver Ya electric screwdriver rotary shaft α center distance dimension of both gears R multi-attachment with ratchet for electric screwdriver of the present invention

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[Procedure amendment]

[Submission date] October 22, 2001 (2001.10.
22)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 10 , a pneumatic or hydraulic impact wrench has been known for these operations, which is widely used for tightening nuts and the like.
The rotary shaft protruding from the main body is rotated by air pressure or hydraulic pressure to rotate the socket attached to the rotary shaft . As shown in FIG. 11 , the socket is rod-shaped, and one end of the socket is Has a mounting hole to be attached to the rotary shaft of the main body and a nut hole to be fitted to the other end nut. Then, when used, the socket is replaced with a socket corresponding to the nut size, so that various sizes of nuts can be tightened.

Claims (2)

[Claims] 1. A drive gear (1) having a handle portion (10) at one end thereof, and a frame body (1) having a connecting hole (2a) centered on a rotating shaft (Ya) of an electric screwdriver (Y). 2) is pivoted and meshes with the drive gear (2),
The driven gear (3) having through holes (3a, 3b) into which the nuts (A1, A2) are inserted is pivotally mounted, and further meshed with the driven gear (3), and the nuts (A3, A4) are inserted and inserted. The driven gear (4) having the through holes (4a, 4b) for
The center axes of the gears (2), (3) and (4) are provided so as to be different from each other by a predetermined dimension (α), and further, the lock lever (7) is provided.
And the lock lever fixing stopper (8) is pivotally attached, and by switching the lock lever, the drive gear (2) is locked or released, and the driven gears (3) and (4) connected thereto are rotated. , Multi-attachment with ratchet for electric screwdriver, which can be used by switching to three stages of right rotation stop, neutral left and right rotation, left rotation stop. 2. A handle bar (10) is attached to a steel bar member (10) for aligning holes such as Shino, the member is sandwiched between two frame bodies (1), and a bushing (9) is provided.
The spring pins (13) and (14),
The multi-attachment with ratchet for an electric screwdriver according to claim 1, which is fixed.