JPS6021184Y2 - Rock drill release valve operating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a release valve operating device for operating a release valve such as an air supply valve made by Iwatsuki, which is equipped with an anti-vibration handle.

In recent years, vibration-proof handles in which the operating handle is connected to the main body of the winding machine through a vibration-isolating material such as vibration-proofing rubber have been widely used for machines such as Iwatsuki machines where strong vibrations are transmitted to the operating handle.

This type of anti-vibration handle swings relative to the main body of the winding machine, so while holding the anti-vibration handle in any swing position,
A valve operating device capable of operating an air supply release valve has been proposed (Japanese Utility Model Publication No. 48-4064).

However, conventional valve operating devices of this type are designed to allow the supply air release valve to be operated by pressing the operating handle, and are not equipped with an operating handle that can be operated by pulling. There were some problems that made it difficult to adopt.

Therefore, it is an object of the present invention to provide a release valve operating device for a rock Iwatsuki equipped with a retractable operating handle, which can be easily operated even when the operating handle is pulled, and which has a simple structure and is easy to operate. The purpose is

Therefore, in the release valve operating device according to the present invention,
The valve shaft of the release valve provided on the winding machine body is arranged to face the center of swing of the anti-vibration handle and is biased in the axial direction by a spring, while an arcuate abutment part centered on the center of swing is arranged. A bushing rod supported at the tip of the rod is provided at or near the grip of the anti-vibration handle so that the bushing can be operated freely.
By abutting against the valve shaft of the release valve and operating the bushing rod as a bushing, the release valve can be operated reliably.

Hereinafter, the illustrated embodiments of the present invention will be described in detail.

In FIGS. 1 and 2, 1 is the winding machine main body, 2 is an operating handle in which a grip part 3 is supported by a pair of arm parts 4, 4, and the tips of the pair of arm parts 4, 4 are connected and supported. As shown in FIG. 3, the support shaft 5, which has a square cross section, is elastically supported by a total of four anti-vibration rubber couplings 8 in a fitting cylinder 7 supported by a support arm 6.6 from the side of the rock drill main body 1. Therefore, the operating handle 2 is swingably connected to the rock drill main body 1 in a vibration-isolated manner.

In addition, in Fig. 2, 10 is from the Iwatsuki body 1 side,
A valve mounting part 11 is integrally formed toward the swing support part of the operating handle 2, and 11 is an air release valve incorporated into the shaft hole 12 of the valve mounting part 10. Therefore, the shaft hole 12 is formed as a through hole facing the swing center A of the arms 4, 4.
The step valve shaft 15, which has a valve body 14 integrally formed at the lower end with the shoulder portion 12a provided in the middle serving as a valve seat, is inserted from below, and the coil spring 16 is further inserted into the shaft hole 12. The screw cover member 17 is screwed and fixed to the lower part of the shaft hole 1.
It has a structure in which the inside is closed off from the outside together with an O-ring 18 on the upper part of 2.

This release valve 2 is held in a state in which the valve body 14 is in contact with the valve seat by the spring force of the coil spring 16.
When the large diameter shaft portion 15a of the stepped valve shaft 15 protruding upward from the shaft hole 12 is pushed down against the spring force of the coil spring 16 and the valve body 14 is unseated, the valve mounting portion 1
An air release passage 19 bored at 0 is communicated with the atmosphere to perform so-called pressure relief.

On the other hand, reference numeral 20 connects the base 21a of the arc-shaped contact portion 21 that contacts the large diameter shaft portion 15a of the stepped valve shaft 15 to the rod 22.
This bushing rod 20 is integrally supported at the tip of the arm 4 on one side of the operating handle 2.
The rod portion 22 is inserted through a fitting tube 23 provided in a portion close to the grip portion 3, and the tip of the rod portion 22 is shaped like a hammer so that it can be operated with the thumb, for example, while gripping the grip portion 3. It protrudes on the side opposite to the main body 1.

The abutting portion 21 of the bushing rod 20 is formed into an arc of an appropriate diameter centered on the swing center A of the arm 4, so that the grip portion 3 can be freely adjusted as shown by the imaginary line 49 in the figure. Even in the swinging position, the outer surface of the contact portion 21 is always in contact with the tip of the useful valve shaft 15.

In addition, 24 is a coil spring compressed between a shoulder portion 22a provided in the middle of the rod portion 22 and a locking step portion 23a provided in the middle of the fitting tube 23, and the spring force of this coil spring 24 is applied to the release valve. The spring force of the coil spring 16 of 11 is set to be suitably weak, so that the bushing rod 20 is normally held at the solid line position in the figure, but when inserting the bushing, a spring force is applied that allows the bushing to be operated with a small force.

As described above, the contact portion 21 of the bushing rod 20 is formed into an arc centered on the swing center A of the arms 4, 4 of the operating handle 2, so that it can be used even when the operating handle 2 is in any swing position. , the contact part is connected to the valve shaft 15 of the release valve 11.
If the structure is such that the release valve 11 is in contact with the release valve 11, the release valve 11 can be released at any swing position.

In addition, in the above structure, the rod portion 22 of the bushing rod 20 is arranged near the grip portion 3 so that the bushing can be operated with the thumb while holding the grip portion 3, so that the operating handle 2 can be pulled easily. Also, the attraction is the state,
Bushing operation of the bushing rod 20 can be easily performed.

As is clear from the above description, the present invention provides a release valve on the Iwatsuki main body with its valve shaft facing the swing center of the operating handle, and a release valve with the release valve centered on the swing center of the operating handle. To provide Iwatsuki's release valve operating device, in which a bushing rod supporting an abutting part is provided at or near a grip part of an operating handle so that the bushing can be operated, and the release valve is released by the bushing operation of the bushing rod.

According to the release valve operating device of the present invention, although it has a simple structure, it is possible to perform the release operation by operating the button of the button rod while holding the operating handle at any swinging position, especially the pull-hand operation. It has the advantage that it can be suitably applied to a handle.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of a release valve operating device according to the present invention, FIG. 2 is a sectional view of essential parts showing the relationship between the release valve and bushing rod according to the present invention, and FIG. 3 is a line A--A in FIG. 1. It is an A-line sectional view. 1...Iwatsuki body, 2...Operation handle, 3...Grip part, 4, 4...
Arm part, 11... Release valve, 15...
・・・・Valve shaft, 16◆◆・・・◆Suffling, 20
...Bushing rod, 21...Circular contact portion, 22...Rod portion, A...Swinging fulcrum.

Claims (1)

[Scope of Claim for Utility Model Registration] In a winding machine in which the grip part of the handle is attached to the winding machine body through an arm and an elastic body such as rubber, the valve shaft is directed toward the center of rotation of the arm by a spring. A release valve that is energized is provided on the winding machine body, and the part having an inner plate shape centered on the rotation center of the arm is brought into contact with the tip of the valve shaft so that it can be operated at or near the grip part. Install a butsch rod,
Saku Iwatsuki's release valve operating device allows the release to be operated at any swinging position of the grip.