JPH0131412Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a rotating device particularly suitable for machining tools such as dies and pipe cutters for machining the circumferential surface of round pipes, round bars, etc. or the inner surface of the end face of round pipes. It is related to something that uses a mechanism.

Conventionally, various rotating devices using a ratchet mechanism have been known, and one of them is a ratchet handle for screwdrivers. This is a convenient feature that allows you to turn the screwdriver in one direction by turning the ratchet wheel using the ratchet pawl by swinging the handle within a certain range without having to rotate the handle completely. However, to the best of the present inventor's knowledge, there does not seem to be an example of a rotary device of this type in which a machining tool such as a die or a pipe cutter can be detachably attached as a mating tool to a fully satisfactory level of practical use. This is because this type of equipment is often used on-site, so it is lightweight, easy to disassemble and assemble for convenient portability, and has excellent operability. However, no structure has been devised that can satisfy these requirements.

This idea was devised in view of the points mentioned above.
The purpose is to provide a rotating device for processing tools that satisfies the above-mentioned conditions such as being lightweight, easy to disassemble and assemble, and excellent operability. A mounting part is provided for attaching and detaching the tool, an annular groove is formed on the outer circumferential surface, and a ratchet inner frame with a roughly crescent-shaped side surface provided with ratchet claws is connected by a hinge means to a pair of semicircular frames. The ratchet has a ratchet outer frame having a ratchet groove on its inner peripheral surface, and a lever handle for rotating the ratchet outer frame which is detachably attached to the ratchet outer frame, and the ratchet inner frame and the ratchet outer frame are connected to each other. It is an object of the present invention to provide a rotating device for a machining tool which is assembled so as to be slidable and rotatable through an annular groove in an inner frame of a ratchet.

The details of this invention will be explained below based on the illustrated embodiments.

1 to 5 are diagrams showing an embodiment of this invention. This rotating device is mainly used for the ratchet inner frame 1.
, a ratchet outer frame 2, and a lever handle 3.

The ratchet inner frame 1 is for transmitting rotation to a "mate tool", such as a die 4, and its side surface is approximately crescent-shaped, and the die 4 is attached to a "mounting part" 1a that should be detachable. A bolt hole 6 and a recess 7 are formed. and dice 4
By forming bolt holes 4b and protrusions 4c corresponding to the bolt holes 6 and recesses 7 on the fixing surface 4a side of the die 4, the die 4 can be attached to the ratchet inner frame 1.
It is fixed to the "attachment part" 1a by tightening the bolt 23 and engaging the recessed part 7 and the convex part 4c. Here, as mentioned above, the reason why the side shape of the ratchet inner frame 1 is made into a substantially crescent shape is to satisfy the conditions of having the necessary strength, good operability, and being lightweight. be. That is, by forming the crescent shape, an open part is created in the ratchet inner frame 1, which reduces the weight accordingly.Although not shown in this embodiment, for example, a pipe cutter, which is always used in the middle of a pipe, can be used. When used as a mating tool, by utilizing the open portion of the ratchet inner frame 1, setting in the middle of the pipe can be easily performed, and operability is improved accordingly. In addition, the crescent shape means that the parts that are subjected to the most load through the opposing tool and require that much strength will be thick enough to withstand that load, and the parts that are not subjected to as much load will be thinner accordingly. As a result, the necessary strength can be maintained and weight reduction can also be achieved. The outer circumferential surface 8 of the ratchet inner frame 1 has a structure for relatively sliding and rotating both the inner and outer ratchet frames 1 and 2 when the ratchet inner frame 1 is assembled to the inner circumferential surface side of the ratchet outer frame 2, which will be described later. An annular groove 10 serving as a guide is attached to the ratchet outer frame 2.
It is formed with a width corresponding to the thickness of. Further, a ratchet pawl 12 that can freely engage with a ratchet groove 11 formed on the inner circumferential surface 9 of the ratchet outer frame 2 is attached to the shaft 1.
The ratchet inner frame 1 is provided at the base end of the ratchet inner frame 1 so as to be biased in one direction by a spring 14 with the ratchet 3 as a fulcrum.

The ratchet outer frame 2 transmits rotation to the ratchet inner frame 1 via the ratchet pawls 12, and a pair of semicircular frames 15a and 15b are dividably connected via a hinge pin 16 in the illustrated example. It is integrated. In the pair of semicircular frames 15a and 15b, ratchet grooves 11 are formed at a constant pitch on the inner peripheral surface 9 to engage with the ratchet pawls 12 and transmit rotation to the ratchet inner frame 1. Rotation in the direction of arrow A (see Fig. 2) releases the engagement between the ratchet pawl 12 and the ratchet groove 11, and rotation in the direction of arrow B locks the ratchet pawl 12 and the ratchet groove 11 to transmit rotation. It is. In addition, screw holes 17a and 17b are formed as "lever handle attachment portions" in a portion of the ratchet outer frame 2 opposite to the hinge pin 16 (specifically, at the bases of the semicircular frames 15a and 15b).

The lever handle 3 is for making the ratchet outer frame 2 rotatable, and has a screwed sphere 18 at the tip, a pin 20 in the center divided part to make it bendable, and a base end 21. is the screw hole 17 above.
A and 17b are formed with threaded portions 22 to be screwed into the ratchet outer frame 2, and the whole can be attached to and detached from the ratchet outer frame 2.

Next, to explain the operation, in order to form a threaded part on the outer periphery of the tip of the pipe 5, first, the die 4 is attached to the attachment part 1a of the ratchet inner frame 1 by tightening the bolts 23, and the concave part 7 and the convex part 4c are engaged. Then, the pair of semicircular frames 15a and 15b are inserted into the annular groove of the ratchet inner frame 1 through the hinge pin 16 so that the inner circumferential surface 9 of the ratchet outer frame 2 is fitted into the annular groove 10 of the ratchet inner frame 1. The ratchet groove 11 of the ratchet outer frame 2 is engaged with the ratchet pawl 12 of the ratchet inner frame 1, and the matched screw holes 17a, 1 are inserted into the groove 10 to form a circular shape.
By screwing the threaded portion 22 of the lever handle 3 into the latch 7b, the ratchet outer frame 2 is integrated with the ratchet inner frame 1, and the lever handle 3 is integrated with the ratchet outer frame 2. Then, hold the lever handle 3 and point it to arrow A.
Rotate the ratchet outer frame 2 in the direction. At this time, depending on the work place, if the lever handle 3 is long and difficult to rotate, the center of the lever handle 3 may be bent and rotated via the pin 20. This rotation is in the direction in which the ratchet pawl 12 is biased and the engagement between the ratchet pawl 12 and the ratchet groove 10 is released, so after rotating the ratchet pawl 12 by an arbitrary amount, stop the rotary feed once, and then reversely ratchet in the direction of arrow B. The pawl 12 and the ratchet groove 11 are engaged with each other and rotated, and as the ratchet groove 11 rotates, the rotation is transmitted from the ratchet groove 11 to the ratchet inner frame 1 and then to the die 4 via the ratchet pawl 12. By repeating this operation, the die 4 applied to the tip of the pipe 5 forcibly forms a threaded portion there. still,
Although this explanation has been related to an example in which the die 4 is used as the "opponent tool," the same applies to the case where a pipe cutter is used as the "opponent tool."

The rotary device for processing tools according to this invention has many effects as described above, the main ones of which are as follows.

(a) Since the inner frame of the ratchet is provided with a mounting portion for mounting the mating tool through bolt and concave-convex engagement, the mating tool can be mounted easily and reliably.

(b) Since the inner frame of the ratchet has a substantially crescent-shaped side surface, it can provide sufficient strength to hold the mating tool, and can also be used to process rod-shaped objects such as pipes when using dies or pipe cutters as the mating tool. It does not get in the way and has excellent operability.

(c) Since the ratchet inner frame and the ratchet outer frame are combined via the annular groove provided on the outer circumferential surface of the ratchet inner frame, the "ratchet rotation" between the two frames becomes stable and smooth, making it easy to operate. has become excellent.

(d) The ratchet outer frame is formed by connecting a pair of semicircular frames with a hinge means, making it easy to combine with the ratchet inner frame, and the lever handle is detachable from the ratchet outer frame, making it easy to disassemble. -Easy to assemble and can be carried in a compact state.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the rotary feed device of this invention, Fig. 2 is a front view equivalent to Fig. 1 showing a partially opened state of the ratchet outer frame, and Fig. 3 is a front view equivalent to Fig. 1. 4 is a sectional view taken along the arrow line in FIG. 1; FIG. 5 is a rear view of the rotary feed device shown in FIG. 1; FIG. 6 is a schematic illustration of the installation of the die and the inner frame of the ratchet, and FIG. 7 is a schematic illustration of the state of use. 1... Ratchet inner frame, 1a... Mounting part, 2...
... Ratchet outer frame, 3... Lever handle, 4...
...Opposite tool (dice), 4a...Fixed surface to be attached, 4c...Protrusion, 6, 4b...Bolt hole, 7...
... recess, 8 ... outer peripheral surface, 9 ... inner peripheral surface, 10 ...
Annular groove, 11... Ratchet groove, 12... Ratchet pawl, 15a, 15b... Semicircular frame, 16... Hinge pin, 23... Bolt.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotating device for a machining tool for machining the circumferential surface of a round pipe, round bar, etc. or the inner surface of the end face of a round pipe, the side surface of which is provided with bolts and uneven engagement. A mounting part is provided for attaching and detaching the mating tool, an annular groove is formed on the outer peripheral surface, and a ratchet inner frame provided with a ratchet pawl is connected by a hinge means to a pair of semicircular frames,
A ratchet outer frame is provided with a ratchet outer frame having a ratchet groove on its inner peripheral surface, and a lever handle for rotating the ratchet outer frame is detachably attached to the ratchet outer frame, and the ratchet inner frame and the ratchet outer frame are connected to the ratchet inner frame. A rotating device for a processing tool, characterized in that it is assembled so as to be able to slide and rotate freely through an annular groove.