JPS5831657Y2 - Compressed air tool with rotating joint - Google Patents

Description

[Detailed description of the invention] This invention is a detachable and rotatable hose joint that can be attached to the compressed air source connection port of a manual air drill, manual air grinder, manual air impact wrench, or air injection tool that uses compressed air as a drive source. Related to compressed air tools with

Conventionally, the connection part with the air hose of these compressed air tools is either formed integrally with the casing of the compressed air tool, or
Alternatively, the opening of the air hose can be directly fitted onto a fixedly provided hose nozzle, or a threaded part may be provided on the outer circumferential wall of the hose nozzle, and a cap nut that is screwed into this threaded part may be attached. It is configured to fix the air hose, and this part does not have a rotatable structure.

For this reason, the hard air hose fixed to the casing gets in the way when the compressed air tool is in use, making it difficult to freely change the direction of the compressed air tool.

Furthermore, in the case of a type in which the air hose is fixed using a cap nut, the cap nut loosens due to twisting of the air hose, causing air leakage.

The purpose of this invention is to provide a practical compressed air tool that overcomes these drawbacks.

This invention will be explained in detail based on illustrated embodiments.

In FIG. 1, numeral 1 indicates the main body (grip portion) of the compressed air tool.

Reference numeral 11a denotes a compressed air introduction path that conducts through the inside of the wall of the main body 1.

Reference numeral 12 denotes a fitting hole for a hose joint (described later), which is provided inside the wall of the main body 1 in a circular shape centered on the center of the introduction path 11a and has a sufficient length, and its inner peripheral surface is finished smoothly. It will be done.

Near the opening edge of the lower end of the fitting hole 12, a ring groove 14 and a stepped opening 13 are provided in connection with the ring groove 14.

2 is a hose joint.

The hose joint 2 has a compressed air introduction hole 21 in the center that communicates with the compressed air conduit 11a of the main body 1, and approximately half of the upper part of its outer peripheral wall has a cylindrical shape that slides into the fitting hole 12 of the main body 1. It is formed in the sliding part 22 of.

Further, felt ring grooves 23a, 23b having a trapezoidal cross section with long sides at the open end are provided in the vicinity of the upper end surface and the lower edge retracted part of the sliding part 22, and the felt ring grooves 23a, 23b are Seal ring grooves 24a and 24b having a rectangular cross section are formed slightly adjacent to each other, and a plurality of oil grooves 25 having a rectangular cross section are further formed in the portions sandwiched between the seal ring grooves 24a and 24b.

Further, approximately the lower half of the hose joint 2 that is connected to the sliding portion 22 is a portion that is directly inserted into the air hose.

This part is formed thin in order to provide a shoulder 27 on the lower edge of the sliding joint, so that the air hose can be easily fitted onto this thinly formed outer peripheral wall, and at the same time, the air hose that has been fitted once cannot be easily unfitted. A plurality of continuous uneven portions 26 having claw-like portions are provided on the surface.

Therefore, felt rings 6 for dust prevention are installed in the IJ tongue grooves 3a and 23b of the sliding portion 22 of the hose joint 2.
．． 7, and at the same time seal ring groove 24a,
24 Seal ring 4 such as 0 ring or M ring on b
.

The inserted hose joint 2 is locked in the ring groove 14 provided in the main body 1 through the stepped opening 13 so that the upper surface near the inner peripheral edge of the snap ring 3 comes into contact with the shoulder 27.

Next, a second embodiment will be explained.

The hose fitting 2 in the first embodiment is a snap ring 3
It is locked to prevent it from coming off.

However, in the case of tools that are accompanied by vibrations when used, such as manual air drills and manual impact wrenches, or tools that have a large output of compressed air, the force applied to the snap ring 3 will be large, so in the second embodiment, the hose joint 2 itself is provided with a locking collar.

In other words, in FIG. 4, reference numeral 28 denotes a locking collar provided on the upper edge of the hose joint 2, and the air introduction passage 11b of the compressed air tool body 1 is loosely fitted into the outer peripheral side of the locking collar 28. A locking collar 2 is provided on the stepped surface 15 between the air introduction passage 11b and the fitting hole 12, which is expanded from that in the first embodiment.
8 is formed so that the lower surfaces thereof are brought into contact and locked.

In addition, a felt ring groove 2 is provided in the sliding portion 22 of the hose joint 2.
3a, 23b, seal ring grooves 24a, 24b, and oil groove 25 are formed in the same manner as in the first embodiment, and a screw is provided at a position of the hose joint 2 corresponding to the outlet end of the fitting hole 12 of the main body 1. A portion 29 is provided, and the stopper 8 and the lock nut 9 are configured to lock with a slight play.

In addition, the insertion part into the air hose that connects with the threaded part 29 is
As in the first embodiment, a plurality of continuous uneven portions 26 having claw-like portions are provided and formed.

In the second embodiment, the main body 10-split joint is opened, the hose joint 2 is inserted from inside, and the hose joint 2 is locked with the stopper 8 and the lock nut 9, and then the main body 10 is
Reconnect the split mold joints.

This invention is constructed as claimed in the utility model registration based on the above-mentioned embodiment, so when using a compressed air tool, there is no feeling of resistance from a hard air hose, the direction of use can be changed freely, and it is easy to operate. We were able to provide a good and practical compressed air tool.

In addition, in the case based on the first example, since the hose joint can be easily attached and detached, it was possible to easily perform different types of work by changing to a compressed air tool of a different model.

Furthermore, since there is no need for a cap nut or the like to connect the air hose, and there is no screwed part, there is no air leakage due to loosening of the screw, and the structure of this part can be simplified.

Furthermore, in the second embodiment, even if vibration occurs when using an air drill, air impact wrench, etc., no force is applied directly to the hose joint, so the air hose does not come off due to vibration, making it highly practical. Compressed air tools were available.

[Brief explanation of the drawing]

Fig. 1 is an assembly diagram with a part of the compressed air tool in cross section based on the first practical example, Fig. 2 is a front view with part of the hose joint in cross section, and Fig. 3 shows the second embodiment. FIG. 4 is an assembled view, partially in section, of the compressed air tool based on this invention, and FIG. 4 is a front view, partially in section, of the hose joint.

Claims (1)

[Scope of claims for utility model registration] l. The main body 1 of the compression tool is provided with a fitting hole 12 that opens at the lower end and communicates with the compressed air introduction path 11a.
Seal ring grooves 24a, 24b spaced apart from each other in the sliding part 22 of the hose joint 2 which has a compressed air introduction hole 21 in the center that communicates with the compressed air introduction passage 11a. An oil groove 25 is provided between the fitting holes 12 and 24b, and the seal rings 4.5 are inserted into the seal ring grooves 24a and 24b.
A compressed air tool with a rotary joint, in which a snap ring 3 is inserted into a ring groove 14 provided at the lower end edge of the hose joint 2, and a sliding portion 22 of a hose joint 2 is rotatably locked. 2. A locking collar 28 is provided at the upper end of the hose joint 2, and the lower end surface of the locking collar 28 is brought into contact with the stepped surface 15 between the compressed air introduction path 11b and the fitting hole 12 of the main body 1. , of hose fitting 2,
Utility model registration claim No. 1, in which the stopper 8 is screwed onto a threaded portion 29 provided on the outer peripheral wall at a position corresponding to the outlet end of the fitting hole 12, and the sliding portion 22 of the hose joint 2 is rotatably locked. A compressed air tool with a rotary joint according to item 1.