JPS621903B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] A frame member consisting of an upper leg and a lower leg integrally molded from an elastic material is mounted on the tube with the tube sandwiched between the upper and lower legs with the longitudinal direction thereof aligned with the longitudinal direction of the tube. Then, the tip of the lower leg is curved and bent in the direction of the tip of the upper leg so that the tips of the upper and lower legs can engage with each other, and the claw at the tip of the upper leg and the tip of the lower leg facing it are bent. One hand that elastically engages with a recess with a serrated cross section provided on the inside of the tube, allowing the tube to be held in a squeezed state between the drawing jaws provided on the inside of each of the upper and lower legs. Tube throttle valve that can be operated with.

[Industrial application field]

TECHNICAL FIELD The present invention relates to a tube throttle valve for flow rate adjustment made of a single elastic molded body.

[Conventional technology]

As a means for pressing and squeezing an elastic tube, a fluid conduit strainer disclosed in Japanese Utility Model Publication No. 55-8571 is known. This known means is a method in which a clamping element is provided inside each of two operating rods that are pivotally connected to each other, a conduit (tube) is sandwiched between the two clamping elements, and the conduit is squeezed by grasping both operating rods. Both operating rods are provided with hooking means consisting of claws and grooves so that the conduit can be held in a compressed state.

Further, as another tube restricting means, a metal tube flow control valve has conventionally been used.

[Problem that the invention seeks to solve]

In the conventional tube restricting means, the two operating rods, the clamping element, etc. are formed as separate members, and the structure is complicated and assembly is troublesome.
Furthermore, in order to operate the locking means, the operating rod must be twisted somewhat, resulting in poor operability.

Furthermore, conventional metal tube flow control valves have the disadvantage that they deform when used repeatedly and cannot be reliably maintained in the closed position.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and provides a tube that has a simple structure, does not require assembly effort, can be easily operated with one hand, and can be reliably held at any aperture position. The purpose is to provide throttle valves.

[Means for solving problems]

In order to achieve this object, the present invention provides a frame body formed by a body made of resilient plastic material, the body having a substantially U-shaped rear part and a front part connected by a curved rear part convex to the rear. a first upper leg and a second lower leg facing each other, a cross member being formed continuous with the second leg and extending vertically upwardly toward the free end of the first leg; In the released state, the free end of the cross member
a jaw on the inner surface of each leg, the jaws facing and receiving a resilient tube therebetween, and a series of recesses on the inner surface of the cross member; a claw extending transversely across the cross member and provided at the free end of the first leg for entry into the desired recess when the first and second legs are pressed toward each other; Configure it like this,
To provide a tube restrictor valve in which a guide means for holding a resilient tube between both jaw members is provided on a main body of the valve.

[Effect]

The tube is sandwiched between the upper and lower legs integrally molded from an elastic material, and the tube is squeezed by jaws provided on the inner surfaces of both legs. A cross member is integrally provided from the lower leg end toward the upper leg end so that the upper leg end and the lower leg end engage with each other, and a series of saw teeth are provided inside the cross member in a direction transverse to the cross member. A recess with a shaped cross section is provided, and the upper leg and lower leg are elastically engaged with each other while the tube is compressed by a desired amount by pressing the upper leg and engaging the claw at the tip of the upper leg with the recess. Stop. Pushing the cross member back forward disengages the pawl and releases the valve. The opening and closing operations of such valves are performed with one hand.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. In this specification, the term "front" or "front end" refers to the open end side (right side in Figure 1) of the two leg members that can be opened and closed that constitute the valve, and the term "backward" or "rear" The term "end" refers to the connecting portion side of the two leg members (the left side in FIG. 1).

A valve 10 is shown in the drawings. The integrally molded valve 10 comprises a body 11 which is generally oblong in shape when the valve is in the closed position. From the U-shaped curved rear part 12 of the main body 11 toward the front, the first
Upper leg 14 and second lower leg 15 are integrally formed. An upward cross member 17 is formed at the front end of the lower leg 15 and is integrally connected to the front end of the lower leg 15 via a curved front part 19 that is convex to the front. In the shape in which the valve body is molded, that is, in the open state of the valve, as shown in FIGS. The front free end 21 of the leg 14 is located somewhat above and rearward of the upper end 20 of this cross member 17.

A jaw member 22 that crosses the lower leg 15 is provided to protrude from the upper or inner surface of the lower leg 15, and a jaw member 24 that crosses the upper leg 14 is provided oppositely on the lower or inner surface of the upper leg 14. . Double jaw material 22,2
The tube contact surface 4 has a partial cylindrical side surface shape, and presses the elastomeric elastic tube 25 between its curved surfaces. As can be seen from FIGS. 1 and 4, both jaw members 22, 2 are fully opened.
4 is substantially located in a plane substantially perpendicular to the longitudinal direction of the upper and lower legs 15. In order to reduce the weight of the valve and the amount of material used, a hole 23 is formed in the center of the jaw, coaxial with the cylindrical side profile forming the protruding surface of the jaw.

Mutually aligned notch holes 27 and 26 are formed in the center of the front and rear ends of the valve body.
The notch hole 26 is formed between two spaced apart main body parts 28 (the connecting part between the upper leg 14 and the lower leg 15) that constitute the curved rear end 12 of the main body. Similarly, the cutout hole 27 is formed in the cross member 1 at the front of the lower leg 15.
It is formed between two main body parts 28' (connection part between lower leg 15 and cross member 17) constituting the curved front part 19 provided at the lower part of the cross member 7. These body parts 2
8, 28 and 28', 28' are elastic tubes 25
It not only guides and holds it between the jaws 22, 24, but also acts as a spring when the valve body is pressed as shown in FIGS. 2 and 5.

A plurality of regularly spaced serrated cross-section transverse teeth 29 with a slight downward slope are provided on the cross member 1 in order to hold the valve in a desired position among a number of flow restriction positions.
7 is formed across the cross member near the upper end. The front end 30 of the upper leg 14 has a V-shaped cross section and forms a claw. The upper side of this V-shaped part is an extension part in a straight line with the upper surface of the upper leg 14, and the lower part 33
slopes downward and backward. cross member 17
The upper end surface 32 is sloped rearward and downward, similar to the lower portion 33 described above. A plurality of horizontal teeth 31 with a serrated cross section are provided on the upper leg 1 to prevent fingers from slipping when operating the valve.
4 is formed on the upper surface near the front end. upper leg 14
A reinforcing rib 34 disposed transversely is provided on the lower surface of the upper leg 14 near its forward end. On the outer surface of the upper end of the cross member 17 are provided two reinforcing ribs 35 that cross the cross member. This valve operates as follows.

After passing the elastic tube 25 through the valve as shown in the figure and placing the valve at an appropriate position on the tube, when the operator wants to throttle the fluid flowing inside the tube, the operator should grasp the valve with one hand and place the thumb on the upper leg 1 of the valve.
Place it on the side tooth 31 of No.4. Next, this upper leg is pressed toward the upper end of the lower cross member 17. upper leg 1
4 reaches the upper end of cross member 17, the sloped lower portion 33 of this upper leg 14 engages and slides downwardly along the sloped upper surface 32 of cross member 17, forming a V-shape. The front end pawl 30 engages within the uppermost transverse teeth 29 to hold the upper leg 14 in this position and partially throttle the flow through the tube 25. When the upper leg 14 is deformed in this manner, the degree of curvature of the main body portion 28 at the rear end of the valve body inevitably increases, and the radius of curvature of the curved portion of the main body portion 28' at the front end of the main body also increases. Therefore, the upper end portion 20 of the cross member receives a strong elastic return force toward the rear, and V
The front end (claw) 30 is securely retained within the desired transverse teeth 29. In FIGS. 2 and 5, the tube 25 is constricted at the constriction portion 37 to a fully closed state. In FIGS. 2 and 5, the above V
The lateral teeth below the lateral teeth 29 which engage with the front end (claw) of the shape are designed to accommodate smaller diameter resilient tubes.

The valve is returned to the fully open position shown in FIGS. 1 and 4 by one-handed operation. That is, the operator grasps the valve with one hand and presses the cross member 1 with his thumb.
Push the upper end of 7 forward to remove the front end (claw) 30 of the upper leg 14 from the side teeth 29 and remove the valve from the first position.
The released state shown in FIG. 4 and FIG. If some of the side teeth 29 are exposed before the valve is opened, the operator can easily press the upper end of the cross member 17.

The valve of the present invention is integrally molded from a strong, relatively hard and resilient plastic material such as acetyl copolymer, acetyl homopolymer, or the like. Such acetyl copolymers may be used, for example, products sold under the trademark "CELCON" by Celanese Plastics Company, and acetyl homopolymers may be used.
A product sold under the trademark "DELRIN" by EIduPont de Nemours and Company may be used.

The shape of the body 11 of the valve, in particular said body part 2
By forming the jaw members 8 and 28' with elasticity, the jaw members 22 and 24 can elastically move relative to each other.
The tube 25 can be moved from the fully open position shown in the figure to the fully closed position shown in FIG. In the fully closed position, the upper jaw member 24 is located somewhat forward of the lower jaw member 22, and the plane containing the center line of both jaw members in FIG. It is tilted by an angle α. As the upper jaw member 24 moves forward relative to the lower jaw member 22 in this way, the front end (claw) of the upper leg 14
30 has the advantage that the valve has a greater distance to travel from the open position to the closed position than if the upper jaw 24 were always located in a vertical plane as shown in FIG. That is, by forming the valve in this manner, it becomes possible to adjust the valve with more precision than when the jaw members always move within the same plane.

In the above description, terms such as backward, forward, lower side, and upper side are used with respect to the direction, but these terms are relative and the present invention is not limited to these terms.

Although the invention has been described with reference to one preferred embodiment, it is not limited thereto, and many modifications are possible within the scope of the claims.

〔Effect of the invention〕

As explained above, in the present invention, the frame body is formed by the main body 11 made of an elastic plastic material, and the frame body has a substantially U-shaped rear part and is connected by a curved rear part 12 that is convex to the rear. It integrally has a first upper leg 14 and a second lower leg 15 facing forward. A cross member 17 is formed continuously and integrally with the second lower leg 15 and extends substantially vertically upward toward the free end of the first upper leg 14. In the released state of the main body, the cross member 17
The free end faces the free end of the first upper leg 14 . Jaws 24, 22 are provided on the inner surface of each of the upper and lower legs 14, 15, with the jaws facing each other and receiving a resilient tube 25 therebetween. Recesses in the direction across a series of cross members (horizontal teeth 2
9) is provided on the inner surface of the cross member.
A claw (V-shaped front end 3
0), and when the first upper leg 14 and the second lower leg 15 are pressed against each other, the claw enters into the desired recess.
The valve body 11 is provided with guide means (notches 26, 27) for holding the elastic tube 25 between the jaw members 22, 24, and the tube 25 is inserted therethrough.

In such a configuration, the entire tube throttle valve can be integrally formed by molding or the like. Therefore, a tube throttle valve that is simple in structure, requires no assembly effort, is compact, and is easy to manufacture can be obtained. In addition, by molding using a strong elastic plastic material,
A tube throttle valve with a long life and reliable operation can be obtained. Furthermore, the ratchet type valve opening adjustment mechanism consisting of resiliently engaging pawls and serrated recesses allows reliable flow control over multiple stages from fully closed to fully open. Further, the opening and closing operations of such a valve can be easily performed with one hand, and the operability of the valve is improved.

[Brief explanation of the drawing]

FIG. 1 is a side view of the tube throttle valve according to the present invention, showing the state in which the jaws thereof are in the fully open position as molded. FIG. 2 is a side view of the tube restrictor valve according to the present invention, showing the fully closed state of the resilient tube fitted with the valve with the jaws brought together. FIG. 3 is a plan view of the tube throttle valve according to the present invention, and FIG. 4 is a sectional view taken along line 4--4 in FIG. 3, showing a longitudinal cross-section of the valve in an open state. FIG. 5 is a perspective view of the tube throttle valve according to the present invention, which is mounted on a resilient tube having a relatively large diameter, in a fully closed state with the jaws close to each other. 10... Valve, 11... Main body, 14... Upper leg, 15
...Lower leg, 17...Cross member, 22, 24...Jaw material, 25...Tube, 28, 28'...Body part,
29, 31...Lateral teeth.

Claims (1)

[Scope of Claims] 1. A frame is formed by a main body made of an elastic plastic material, and the main body has a substantially U-shaped rear part and a front-facing first main body connected by a rearwardly convex curved rear part. an upper leg and a second lower leg, a cross member being formed continuous with the second leg and directed vertically upwardly toward a free end of the first leg, the cross member being formed in a disengaged state of the body; The free end of the member faces the free front end of the first leg and includes a jaw on the inner surface of each leg, the jaws facing and receiving a resilient tube therebetween and having a series of recesses. a claw is provided on the inner surface of the cross member in a direction transverse to the cross member; a claw is provided at the free end of the first leg; when the first and second legs are pressed toward each other; A tube restrictor valve comprising guide means on the body of the valve for holding the resilient tube between the jaws, the tube restrictor being configured to enter the desired recess. 2. The tube throttle valve according to claim 1, wherein the cross member is connected to the front end of the second leg by a forwardly convex portion of the frame. 3. The tube throttle valve according to claim 1, wherein the jaw member is integral with each leg. 4. The tube throttle valve according to claim 1, wherein the guide means for the resilient tube is formed by aligned notch holes passing through the curved rear portion of the valve body and the cross member. 5. The tube throttle valve according to claim 4, wherein the jaws are formed in the transverse direction of both legs of the valve body and span the cross section of the resilient tube. 6. In the throttle valve according to claim 5, the center line of both jaw members is substantially located in a plane perpendicular to the longitudinal direction of the upper and lower legs in the fully open state, and as the jaw members compress and close the tube, A tube throttle valve characterized in that the center of the upper jaw is moved forward from the center of the lower jaw. 7. In the throttle valve according to claim 1, the recess is a ratchet-shaped tooth, and the first
A tube throttle valve characterized in that a part of the free end of the V-shaped cross section of the leg constitutes a pawl. 8. The tube throttle valve according to claim 1, characterized in that a plurality of lateral teeth for gripping are formed on the outer upper surface of the first leg near the front free end. 9. In the throttle valve according to claim 1, when the valve body is in the open state, the free end of the first leg is located above the free end of the cross member, and the inner rear surface of the cross member is located above the free end of the cross member. A tube throttle valve characterized in that it is located in front of the free end of the leg. 10. The tube throttle valve according to claim 1, wherein the valve is integrally molded together with the main body and the jaw member.