JP2502973Y2 - Swing drive device for work tools for piping - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention automatically operates a pipe working tool such as a pipe wrench, a pipe thread cutting machine, and a pipe cutter that swings around pipes. The present invention relates to an oscillating drive device for a work tool for piping.

(Prior Art) In a series of piping work such as cutting a pipe, threading a pipe end, and screwing a pipe and a joint, various manual work tools for pipes such as a pipe cutter, a threading machine, and a pipe wrench. Is used. However, a large-diameter pipe work tool is large and has a long handle, which requires a large work space, is heavy, requires a large amount of labor to perform work, and has various problems such as poor work efficiency. there were.

Therefore, the present applicant has previously provided a motor and a reduction gear train inside a casing body having a vise at the tip, and on the side surface of the casing work for piping that is swung by the final output shaft of this reduction gear train. We have developed a device equipped with a rocking arm for driving a tool and have proposed it as Japanese Patent Application No. 63-25710, but this device also has a drawback that it is quite heavy and inefficient in work at high places. Was there.

(Problems to be Solved by the Invention) The present invention solves the conventional problems as described above, and enables piping work of a large-diameter pipe to be easily and efficiently performed without requiring a large work space. In addition, the present invention has been completed to provide an oscillating drive device for a piping work tool capable of driving various kinds of piping work tools with one unit and improving work efficiency in high-place work and the like.

(Means for Solving the Problem) The above problem is that a rotating disk with an eccentric pin that is driven by a final output shaft of the reduction gear train is provided on one side surface of a drive unit main body that incorporates a motor and a reduction gear train. And a swinging arm with a shaft that swings the pipe work tool around the pipes, and one end pivotally attached to this eccentric pin and the other end pivotally attached to the swinging arm so that the rotary disc rotates. A crank lever for swinging the moving arm around a shaft pin at its front end is provided, and a connecting means for connecting a vise portion for fixing pipes is formed on the other side surface of the drive unit main body. It can be solved by the swing drive device of the working tool.

Further, the above-described problem is that a rotating cam driven by the final output shaft of the reduction gear train and a cam follower engaging with the rotation cam are provided on one side surface of the drive unit main body having the motor and the reduction gear train built therein. A swing arm with a shaft that swings the pipe work tool around the pipes by the rotation of the cam is provided, and a connecting means for connecting the vise portion for fixing the pipes is formed on the other side surface of the drive unit main body. This can be solved by the swing drive device for a piping work tool characterized by the above.

(Embodiment) Next, the present invention will be described in detail with reference to an illustrated embodiment.

In the embodiment of the first invention shown in FIGS. 1 to 4,
(1) is a drive unit main body, and (2) is a vise part for fixing pipes. The drive unit main body (1) contains a motor and a reduction gear train inside a casing (3), and has an eccentric pin (6) driven by the final output shaft (4) of the reduction gear train on one side surface thereof. A rotating disc (7) is provided. A swing arm (9), the front end of which is pivotally mounted by a shaft pin (8), is provided on the same side surface of the drive unit main body (1). (9) is connected by a crank lever (10), one end of which is pivotally attached to the eccentric pin (6) and the other end of which is pivotally attached to a swing arm (9). As a result, when the rotary disc (7) rotates, the swing arm (9) swings about the shaft pin (8) via the crank lever (10). A shaft (11) is projectingly provided on a side surface of a tip end portion of the swing arm (9), and various swing type work tools for piping can be exchangeably attached thereto as described later. Further, as clearly shown in FIG. 1, as a connecting means (12) for attaching the drive unit main body (1) to a vise portion (2) described next, on the other side surface of the drive unit main body (1). , The shaft is protruding.

The vise part (2) is provided with saw-tooth-shaped pipe receiving members (13) and (13) facing each other in a V shape on the front surface, and a vise mechanism (14). Vise mechanism (14)
Is a chain (15) wrapped around pipes, a female thread (18) with a handle (17) for pulling up a threaded rod (16) with the tip of the chain (15) pivoted, and a chain It comprises a hook (19) for locking the lower end of (15). Further, the vise portion (2) is provided with a hole (20) into which a shaft which is a connecting means (12) of the drive portion main body (1) is inserted, a stepped portion (21) and a fixing mechanism (22). ing. The fixing mechanism (22) has an eccentric roller (24) attached to the base of the lever (23), and the lever of the lever with the shaft of the drive unit body (1) inserted in the hole (20) of the vise part (2). When the (23) is pulled, the eccentric roller (24) is strongly engaged with the projection on the front surface of the drive section main body (1) and the drive section main body (1) can be clamped to the vise section (2).

Next, in an embodiment of the second invention shown in FIG. 5, a rotary cam (27) which rotates about an eccentric shaft pin (26) is provided on one side surface of the drive unit main body (1). The rotary cam (27) is provided with an annular cam groove (28), and a cam follower (29) protruding from the back surface of the swing arm (9) is engaged with the cam groove (28). . As a result, the rotating cam (2
When 7) rotates about the eccentric shaft (26), the swing arm (9) swings about the shaft pin (8). Since the other points are the same as those of the first embodiment of the invention described above, the corresponding parts are designated by the same reference numerals and the description thereof will be omitted.

(Operation) In order to perform, for example, the tightening work of pipes using the swing drive device for a pipe work tool of the present invention having the above-described structure, first, as shown in FIG. Only the vice part (2) is fixed to one of the pipes by using the mechanism (14). Next, the connecting means (12) of the drive part body (1) is inserted into the hole (20) of the vise part (2) and the lever (23) of the fixing mechanism (22) is pulled to move the drive part body (1) to the vise. Clamp to part (2). Next, the shaft (1) protruding laterally from the tip of the swing arm (9) of the drive unit body (1)
1) Attach a piping work tool (30) that swings around pipes such as a pipe wrench, and engage the tip of the piping work tool (30) with the other pipes. Rotate the motor. As a result, since the rotary disc (7) rotates, the swing arm (9) swings up and down around the shaft pin (8) at the front end of the swing lever (10) via the crank lever (10). The work tool (30) also swings up and down around the pipes, so that, for example, the pipe tightening work is automatically performed. In the present embodiment, the pipe wrench is used as the pipe work tool, but other pipe work tools such as an oscillating pipe cutter and a pipe thread cutter can be driven in the same manner. .

The device of the second invention also operates in the same manner as the device of the first invention except that the swing arm (9) is rotated by the rotating cam (27).

As described above, by using the device of the present invention, various work tools for piping can be automatically swung in the vertical direction with a strong force around the pipes, and a long handle as in the case of the manual type is required. Therefore, the piping work of large diameter pipes can be performed in a small space. Further, when it is used for work in high places, it is possible to prevent accidents where the piping work tool is accidentally dropped, and it becomes possible to perform various works extremely efficiently by replacing only the piping work tool. Furthermore, according to the present invention, the vise part (2) and the drive part body (1) are separated, so that the vise part (2) is first attached to the pipes and then the drive part body (1) is attached. It is possible to install the work tool for piping after that. Therefore, according to the present invention, the handling weight can be reduced to about half that of the conventional integrated type. Therefore, the work efficiency can be improved even when working in high places.

According to the first invention, there is an advantage that the swing angle of the swing arm (9) can be made sufficiently large by utilizing the crank mechanism. On the other hand, according to the second invention, there is an advantage that the swing cam (27) can swing the swing arm (9) strongly and smoothly.

In the above-mentioned embodiment, the case where the pipe wrench is used as the working tool for piping has been described. However, other work for piping such as other oscillating pipe cutters and pipe threading devices on the shaft (11) of the oscillating arm (9). Of course, if a tool is attached, the same drive can be performed. In the present invention, since the swing arm (9) provided with such a shaft (11) is provided, various pipe work tools can be piped by only providing a slight long hole on the pipe work tool side. It is possible to drive around a class. Moreover, since the insertion position of the shaft (11) into the pipe work tool is separated from the pipes, there is an advantage that the pipe work tool can be attached and detached without being interfered with by the pipes.

(Effect of the Invention) As is apparent from the above description, the present invention fixes the pipes such as pipe joints with a vise to automatically and powerfully shake various piping work tools around the pipes. Since it can be dynamically driven, a long handle for manually moving the piping work tool can be omitted, and a large space is not required. According to the present invention,
Since the vise part and the drive part main body can be handled separately, it is possible to improve work efficiency in high-place work and the like. Therefore, the present invention has an extremely great practical value as an oscillating drive device for a work tool for piping, which eliminates the conventional drawbacks.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the first invention, FIG. 2 is a front view showing a drive mechanism of the swing arm, and FIG. 3 is a view showing a state in which a pipe wrench is used as a working tool for piping. FIG. 4 is a side cutaway plan view, FIG. 4 is a side view thereof, and FIG. 5 is a front view showing a swing arm drive mechanism in an embodiment of the second invention. (1): drive unit main body, (2): vice part, (4): final output shaft, (6): eccentric pin, (7): rotating disc,
(8): Shaft pin, (9): Swing arm, (10): Crank lever, (27): Rotating cam, (29): Cam follower,
(30): Work tool for piping

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B25F 5/00 B25F 5/00 D

Claims (2)

(57) [Scope of utility model registration request] 1. A rotating disk with an eccentric pin (6) driven by a final output shaft (4) of the reduction gear train on one side surface of a drive body (1) containing a motor and a reduction gear train. (7) and piping work tools (30)
Swing arm (9) with a shaft (11) for swinging
One end is pivotally attached to the eccentric pin (6) and the other end is pivotally attached to the swing arm (9), and the swing disc (7) is rotated to move the swing arm (9) to the axial pin ( And a crank lever (10) for swinging about 8) as a center,
A swing drive device for a working tool for piping, characterized in that a connecting means (12) for connecting a vise portion (2) for fixing pipes is formed on the other side surface of the drive portion main body (1). 2. A rotary cam (27) driven by a final output shaft (4) of the reduction gear train and a rotary cam on one side surface of a drive unit body (1) containing a motor and a reduction gear train. A swing arm (9) with a shaft (11) that has a cam follower (29) that engages with (27) and that swings the pipe work tool (30) around the pipes by the rotation of the rotary cam (27). And a connecting means (12) for connecting to a vise part (2) for fixing pipes is formed on the other side surface of the drive part main body (1). .