JPS6344636Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a method for attaching and detaching a fluid supply hose to an injection tube provided at an injection port of a device or device that houses or distributes fluid, such as a fluid container or a fluid circuit. Concerning freely connected devices.

Problems to be Solved by Conventional Technologies and Ideas Conventionally, devices for freely connecting a fluid supply hose to an injection barrel include screwing a threaded cap onto the injection barrel, tightening it with a clamp lever, Another commonly used method is to push the O-ring into the injection barrel using the elasticity of an O-ring, but fixing it with a screw or clamp lever makes the connection secure, but it takes time to attach and detach, and it is difficult to simply use an O-ring. The method of pushing in using the elasticity of a ring, etc. is easy to attach and detach, but the connection is uncertain, and if the fluid is supplied under pressure, the connecting device will come off during injection and the fluid will spray out. Furthermore, with the conventional method, if there is residual pressure in the injection cylinder due to poor air bleeding after injection or insufficient closing of the valve on the supply source side, the connected device may be damaged when removed. There have been cases where the product has popped out unexpectedly or fluid has spouted out.

The present invention eliminates these drawbacks, allows easy attachment and detachment, allows reliable connection, and allows safe removal even when there is residual pressure.
It is an object of the present invention to provide a connection device for fluid injection that can inject and stop fluid without providing an opening/closing valve on the supply source side.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

This embodiment is a device for injecting a liquid such as oil by connecting a supply hose c to an upwardly opened injection tube a having a collar b projecting on the outer periphery of the tip portion. A fitting part 2 is formed at the front end to tightly fit into the inner periphery of the injection barrel a, and an O-ring 4 is fitted into a groove 3 formed on the outer periphery so that the injection barrel a is sealed by its elastic contraction. The inflow hole 5a formed on the back surface of the main body 1 and the circular cross-section discharge hole 5b formed at the center of the fitting part 2 form a hollow chamber 30 with a circular cross section formed concentrically with the discharge hole 5b.
are connected to each other to form a supply hole 5,
A connector 6 is screwed into the inflow hole 5a and a supply hose c is connected thereto, and a discharge pipe 8 is connected to the discharge hole 5b. A piston 31 that tightly fits into the cavity 30 and a valve body 34 that tightly fits into the discharge hole 5b are integrally formed in front of the operating body 22, which will be described later. O-rings 33, 36 are inserted into the grooves 32, 35 formed on the outer periphery of the
are fitted and elastically contracted to seal the cavity 30 and the discharge hole 5b. Main body 1
Device grooves 9, 9 communicating with the fitting hole 18 are vertically provided on both sides of the device grooves 9, and in each device groove 9, a claw portion 11 that engages with the flange b of the injection barrel a is provided inside the front end. A locking lever 10 having jaws 13 is fitted inside the locking lever 10, and is supported by a shaft 16 in the center thereof so as to be able to swing freely, and a compression coil spring 17 is mounted between the inner surface on the front end side and the main body 1. is attached, and its elastic expansion force urges the locking lever 10 to swing about the shaft 16 in a direction in which the front end side expands outward, as shown in FIG. , locking lever 10
A pressing portion 12 having a rough surface for preventing slipping is formed on the outer surface of the front end side. On the rear of main body 1,
A lid body 19 having a cylindrical portion 20 that tightly fits into the fitting hole 18 and having a guide hole 21 transparent in the center is attached and fixed to the rear surface of the main body 1, and the cylindrical portion of the lid body 19 is attached to the front end. 2
The operating body 22, which is integrated with the piston 31 and the valve body 34 of the collar 23 that abuts the front end of the guide hole 2, is in contact with the front end of the guide hole 2.
1 is slidably fitted into the piston 31 and the empty chamber 3.
The elastic expansion force of the compression coil spring 27 installed between the front ends of the collar 23
comes into contact with the cylindrical part 20, and in this state, the pressing part 26 at the rear end protrudes from the rear surface of the lid 19, and on both sides of the collar 23 there are protrusions that protrude into the device grooves 9, 9. 25, 25 are formed, and the first
As shown in the figure, when the front end of each of the locking levers 10 swings inward against the elasticity of the compression coil spring 17, the inner surface 15 of the jaw 13 at the rear end
contacts the inclined outer surface 25a of the protrusion 25, and the second
As shown in the figure, the operating body 22 is a compression coil spring 2
At the forward position where the locking lever 10 contacts the front end of the fitting hole 18 of the main body 1 against the elastic force of the compression coil spring 17, the locking lever 10 swings in the direction in which its tip expands due to the elastic expansion force of the compression coil spring 17. The front surface 14 of the jaw 13 is the operating body 2
The second protrusion 25 comes into contact with the rear surface 25b of the second protrusion 25. The main body 1 has a fitting part 2 from the front part of the back side thereof.
An air vent hole 28 communicating with the eccentric position is transparently provided.

Next, the operation of this embodiment will be explained.

As shown in FIG. 2, when the operating body 22 is pushed to the forward position, the valve body 34 is inserted into the discharge hole 5.
b, and closes the supply hole 5. In this state, when the fitting part 2 is fitted into the injection barrel a and the pressing parts 12 of the locking levers 10, 10 on both sides are pressed, as shown in FIG. As shown in FIG. 2, at the same time that the claw portion 11 at the tip engages with the collar b of the injection barrel a, the front surface 14 of the jaw portion 13 at the rear end disengages from the rear surface 25b of the protrusion 25, and the operating body 22 is released. Due to the elasticity of the compression coil spring 27, the valve body 34 moves to the rear position and closes the discharge hole 5b.
By coming out of the gap, the supply hole 5 is communicated and injection of liquid starts, and in this state, the inner surface 15 of the jaw 13 comes into contact with the outer surface 25a of the protrusion 25.
Even if the pressing part 12 is released, the locking lever 10
10 remains in the same position. After the liquid is injected to a certain level, the pressing part 26 of the operating body 22
When pushed and moved to the forward position, the discharge hole 5b is closed by the valve body 34, and the engagement between the outer surface 25a of the protrusion 25 and the inner surface 15 of the jaw 13 is disengaged, and the second
As shown in the figure, the tip of the locking lever 10 swings in the direction of expansion and the claw portion 11 comes off the injection barrel a, so that it can be easily removed from the injection barrel a by lifting the main body 1. I can do it.

In this embodiment, the pressing part 26 at the rear end of the operating body 22 protrudes from the lid body 19 in the state shown in FIG.
In the state shown in FIG. 2, it enters into the lid body 19, so the operator can easily check with his or her eyes or fingers which state it is in, which has the advantage of reducing the risk of erroneous operation. Note that in the state shown in FIG.
while pressing the locking lever 10.
By making the tip of the claw portion 11 at the front end of the barrel an acute angle, even if there is no collar b at the tip of the injection barrel a, the elastic expansion force of the compression coil spring 27 will cause the locking lever 10 to swing in the counterclockwise direction in FIG. Power is applied to move the claw part 11 into the injection barrel a.
It is possible to securely attach it by biting into the outer circumferential surface of the injection tube a or by locking it to a thread formed on the outer circumference of the injection barrel a. This urges the claw portion 11 of the locking lever 10 in the direction of biting into the injection barrel a, allowing for more secure attachment.

Structure and effects of the present invention As specifically explained in the above embodiments,
The fluid injection connection device of the present invention has a fitting portion that fits tightly into the inner periphery of the injection cylinder protruding from the front end, and a discharge port from the inlet on the outer peripheral surface to which the fluid supply hose is connected to the end surface of the fitting portion. A locking lever is provided on the side surface of the connecting device main body, which has a supply hole transparent to the outlet, and has a claw portion on the inside of the front end that locks on the outer periphery of the injection cylinder, and a jaw portion on the inside of the rear end. The locking lever is pivotably supported to apply a swinging force in the direction of expanding the front end portion outward, and the rear end of the main body is provided with a rear end that can freely slide between two positions, a forward position and a rearward position. An operating body is fitted with a valve body that applies a moving force and closes the supply hole in the forward position, and a protrusion that engages with the jaw of the locking lever is formed on the operating body. , in the rear position of the operating body, the inner surface of the jaw portion contacts the outer surface of the protrusion, and the claw portion locks on the outer periphery of the injection barrel against the urging force of the locking lever; The gist is that the locking lever is locked to the outer periphery of the injection port by simply inserting the fitting part of the main body into the injection barrel and pressing the locking lever. The connection can be made securely, and the locking lever can be unlocked and removed from the injection barrel with just one action of pressing the operating body, making it possible to perform attachment and detachment work extremely quickly. When releasing the stop lever, the operating body is pushed toward the injection cylinder, so if there is residual pressure in the injection cylinder due to poor air bleeding, etc., the pressure will cause the connection device to stop injecting. It is possible to prevent the fluid from being pushed out of the cylinder by the pressing force of the operating body.Furthermore, if the fluid is being injected under pressure or if there is residual pressure in the injection cylinder, the operating body can be prevented from being pushed out of the cylinder. The locking lever will not come off the injection barrel unless you push it hard against the pressure, which prevents accidents such as the connection device popping out unexpectedly or fluid gushing out. The valve element opens the supply hole at the same time as the locking lever is removed from the injection cylinder, and the supply hole is closed at the same time as the locking lever is removed from the injection barrel.There is no need to open or close the valve on the fluid supply source side, making the injection work extremely simple. It has the effect of becoming

[Brief explanation of drawings]

The attached drawings show one embodiment of the present invention, and FIG. 1 shows the locking lever locked to the injection barrel, and FIG. 3A-
2 is a sectional view taken along the line A-A in FIG. 3 with the locking lever released, FIG. 3 is a plan view, and FIG. 4 is a bottom view. 1: Main body, 2: Fitting part, 5: Supply hole, 5a: Inflow hole, 5b: Discharge hole, 10: Locking lever, 11:
Claw portion, 12: Pressing portion, 13: Jaw portion, 14: Front surface of jaw portion, 15: Inner surface of jaw portion, 17: Compression coil spring, 22: Operating body, 25: Projection portion, 25a: Outer surface of projection portion, 25b: Rear surface of protrusion, 26: Pressing portion, 2
7: Compression coil spring, 30: Vacant chamber, 31: Piston, 34: Valve body.

Claims (1)

[Scope of utility model registration request] A connecting device in which a fitting part that tightly fits into the inner periphery of the injection cylinder is protruded from the front end, and a supply hole is transparently provided from the inlet on the outer circumferential surface to which the fluid supply hose is connected to the outlet on the end face of the fitting part. On the side surface of the main body, a locking lever is formed inside the front end with a claw portion that locks on the outer periphery of the injection barrel, and a jaw portion is formed on the inside of the rear end. A rocking force is applied to the rear end of the main body in the direction of expanding the part outwardly, and a force is applied to the rear end of the main body so that it can freely slide to two positions, a forward position and a rear position. an operating body provided with a valve body that closes the supply hole is fitted therein, a protrusion that engages with the jaw of the locking lever is formed on the operating body; The inner surface of the jaw is in contact with the outer surface of the protrusion, and the locking lever is held in a position in which the claw is locked to the outer periphery of the injection barrel against the biasing force of the locking lever. Connection device for fluid injection.