JPH0215043Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a compressed air supply port device, more specifically, a pneumatic equipment having a cylindrical housing. The present invention relates to a compressed air supply port device that supplies air.

(Prior Art) A compressed air supply port device is used to supply compressed air to a pneumatic device having a cylindrical housing through a small hole provided on the outer periphery of the housing.

Here, a compressed air supply port device of a feed rate control device will be explained as an example.

A feed rate control device is, for example, a rod side space in a cylinder housing that is separated by a flexible approximately cylindrical diaphragm to form a liquid reservoir between it and a piston, and the movement of the piston brakes the head side space. When the fluid is guided from the bypass path to the fluid reservoir via the throttle valve, the diaphragm increases the surface area toward the side where the hydraulic pressure of the brake fluid is low in the cylindrical space formed between the cylinder housing and the rod. A device that controls the speed of movement of the load applied to the rod by moving while forming a protrusion with an arcuate cross section to minimize the movement of the rod.

FIG. 4 is a structural diagram showing an example of a feed rate control device, with the left side showing a normal state and the right side showing a state where the piston rod is pushed in to the maximum extent.

When a load is applied to one end of the piston rod 1, the spherical check valve 24 is closed by the pressure of the spring 25 and the brake fluid 26, and the brake fluid 26 in the cylinder 16 is forced into the throttle valve 1.
9 through the small hole 20 of the cylinder, and then through the small hole 17 of the cylinder.
It flows into the bypass 18 and flows to the rear of the piston 23. This leaked brake fluid 26 is transferred to the coil spring 29
Against the biasing force of the liquid, an amount equivalent to the volume of the piston rod entering the cylinder 16 flows toward the diaphragm 4, forming a reservoir 27. After the load is removed, the small hole 11 of the housing 11 is used to return the piston rod 1 to its original position.
Compressed air is introduced from a, the brake fluid in the fluid reservoir 27 is pressed, the spherical check valve 24 is opened, and the cylinder 1
6 and quickly returns the piston 23 and piston rod 1 to their original positions. That is, air pressure control is performed to return the piston rod 1 to its original position when necessary.

Since the housing 11 of this feed rate control device has a small diameter and a thin cylindrical shape, it is difficult to actually thread the housing 11 or press fit a nozzle-shaped joint for a port due to the wall thickness and thickness. Ta.
For this reason, compressed air supply port devices are used to supply compressed air. Most conventional compressed air supply port devices also functioned as fittings.

FIG. 5 is a diagram showing a conventional example of a compressed air supply port device. The housing 11 is attached to the upper mounting bracket 4
0, the equipment machine 4 is clamped by the lower fixture 41
2 with screws 43, 43. The upper fitting 40 is provided with a coupling screw 40a and communicates with the small hole 11a of the housing 11 via a passage 40b. The passage 40b between the housing 11 and the fixture 40 is kept airtight by an O-ring 44.

(Problem to be Solved by the Invention) In such a compressed air supply port device, the small hole 11a of the housing 11 and the joint screw 40a of the upper fitting 40 must be aligned, so the circle of the housing 11 must be aligned. The mounting position in the circumferential direction is limited.

In addition, when threading the outer peripheral surface of the housing 11 and directly screwing it to the equipment machine 42,
This device could not be used because the fixture 40 was not required.

The object of the present invention is to supply compressed air without being limited to the position of ports provided on the circumference of the housing of pneumatic equipment, and to provide a compressor that can accurately and easily set the axial position of the housing of the supply port device. An object of the present invention is to provide an air supply port device.

(Means for Solving the Problems) In order to achieve the above object, the compressed air supply port device according to the present invention connects a compressed air source to the inside through a small hole provided in a cylindrical housing of a pneumatic equipment. The compressed air supply port device is fitted into the housing, and has an outer wall provided with a connecting portion to which compressed air from the compressed air source is connected, and an inner wall connected to a small hole of the housing. a port member having a communicating circumferential channel groove and sealing grooves provided in parallel on both sides of the channel groove, and connecting the connecting portion and the channel groove through a small hole; and the housing outer wall. a positioning groove provided on one or both sides of the small hole to correspond to both or one of the seal grooves of the port member; and a positioning groove inserted into both seal grooves of the port member, at least one of which is inserted into the seal groove of the port member. is provided with a sealing member, the other of which is coupled to the other positioning groove or the outer wall of the housing to airtightly maintain the space formed by the channel groove of the port member, the connecting portion of the port member and the small hole of the housing. The structure is such that the position can be set at any position in the circumferential direction.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

FIG. 1 is a diagram showing an embodiment of the compressed air supply port device according to the present invention, but for ease of comparison, the compressed air supply port device is shown coupled to a housing without a positioning groove. FIG. 2 is a view showing the port member taken out, and FIG. 3 is a view showing the positioning groove of the housing.

The port member 50 is connected to the port 11 of the housing 11.
It is fitted to the outer wall at position a.

A channel groove 50a is provided in the center of the inner wall of the port member 50.
is provided. The channel groove 50a has a threaded portion 50 for attaching the joint 53 through the small hole 50b.
It communicates with c. The portion where the threaded portion 50c is provided is formed thick in order to ensure sufficient strength. Seal grooves 50d and 50e are provided on both sides of the channel groove 50a. These sealing grooves 50d and 50e are for inserting O-rings 51 and 52. O-rings 51, 52
maintains airtightness and also serves to prevent the housing 11 and the seal member 50 from rotating due to friction.

The housing 11 is provided with a small hole 11a that communicates with the inside. An annular positioning groove 11b is provided next to the small hole 11a of the housing 11 (FIG. 3a). The positioning groove 11b is used to position the port member 50 by fitting the O-ring 51 thereinto. In other words, the longitudinal positional relationship between the channel groove 50a of the port member 50 and the small hole of the housing 11 is maintained reliably, and displacement of the port member 50 in the longitudinal direction is prevented. In addition, as shown in FIG. 3b, positioning grooves 11b and 11c may be provided on both sides of the small hole 11a.

Seal grooves 50d and 5 inside the port member 50
After inserting the O-rings 51 and 52 into the O-rings 0e, the port member 50 is inserted into the small hole 11a of the housing 11 so that the channel grooves 50a of the port member 50 are opposed to each other. At this time, the O-ring 51 is inserted into the groove 11b of the housing 11.
Position it in the longitudinal direction by fitting it in. A joint 53 is attached to the screw 50c of the port member 50, and compressed air is supplied from a compressed air source (not shown) through the hose 13. Note that since the port member 50 can rotate in the circumferential direction, the joint 53 can be set at any position in the circumferential direction. Compressed air flows through the small hole 50b of the port member 50 into the central channel groove 50.
a, and the small hole 1 of the housing 11
It is supplied internally via 1a. Note that since the cylindrical portion along the housing 11 is sealed with O-rings 51 and 52, there is no risk of compressed air leaking to the outside. In addition, a port member 5 is provided in the housing 11.
To attach and detach the O-rings 51 and 52, the O-rings 51 and 52 are deformed by strongly pushing or pulling the port member 50 along the longitudinal direction of the housing 11, and can be easily attached and detached.

(Effects of the Invention) The device according to the invention is provided with a positioning groove provided on one or both sides of the small hole in the outer wall of the housing so as to correspond to both or one of the seal grooves of the port member.

The port member is inserted into both sealing grooves of the port member, and at least one of the sealing grooves is connected to the positioning groove and the other is connected to the other positioning groove or the outer wall of the housing, thereby making the space formed by the flow path groove of the port member airtight. A sealing member for holding the housing is provided.

Therefore, the correct position in the axial direction is when one or both of the seal members is aligned with the positioning groove, so axial positioning is extremely easy and no other auxiliary means are required. It is. According to the present invention, the position of the port for supplying compressed air is not limited to the position in the circumferential direction of the housing.

Furthermore, by using an elastic O-ring that also serves as a seal, this device can be freely attached to and detached from the housing of the pneumatic equipment.

[Brief explanation of drawings]

FIG. 1 is a view showing an embodiment of the compressed air supply port device according to the present invention, but for ease of understanding, it is shown coupled to a housing without a positioning groove. FIG. 2 is a view showing the port member taken out, and FIG. 3 is a view showing the positioning groove of the housing. FIG. 4 is a structural diagram showing an example of a feed rate control device, with the left side showing a normal state and the right side showing a state where the piston rod is pushed in to the maximum extent. FIG. 5 is a diagram showing a conventional example of a compressed air supply port device. 1...Piston rod, 4...Diaphragm,
10...Diaphragm presser collar, 11...Housing, 11a...Small hole, 13...Hose, 16
... Cylinder, 17 ... Small hole, 18 ... Cylinder bypass, 19 ... Throttle valve, 20 ... Small hole, 23
...Piston, 24...Spherical check valve, 25...
... Spring, 26 ... Braking fluid, 27 ... Fluid reservoir, 29
...Spring, 40...Top fixture, 41...Bottom fixture, 42...Equipment machine, 43...Screw, 50...
...Port member, 50a...Flow path groove, 50b...Small hole, 50c...Screw, 50d, 50e...Seal groove, 51, 52...O ring, 53...Joint.

Claims (1)

[Scope of utility model registration request] A compressed air supply port device that supplies compressed air from a compressed air source to the inside of a pneumatic equipment through a small hole provided in a cylindrical housing, the compressed air supply port device being fitted into the housing and having the compressed air source attached to an outer wall. A connecting portion is provided to which compressed air from the housing is connected, and an inner wall is provided with a circumferential flow groove communicating with the small hole of the housing, and sealing grooves are provided in parallel on both sides of the flow groove, a port member configured to connect the part and the flow path groove with a small hole, and a port member provided on one or both sides of the small hole in the outer wall of the housing so as to correspond to both or one of the seal grooves of the port member. A space formed by a positioning groove and a flow path groove of the port member, which are inserted into both sealing grooves of the port member, and at least one of them is connected to the positioning groove and the other is connected to the other positioning groove or the outer wall of the housing. A compressed air supply port device comprising: a seal member for airtight maintenance, and configured such that the position of the connecting portion of the port member and the small hole of the housing can be set at any position in the circumferential direction.