JP3175857U - Dispenser device - Google Patents

Abstract

Disclosed is a dispenser device capable of significantly reducing the time and cost for maintenance by extending the life of a seal member.
A sealing member includes an elastic member having a substantially U-shaped cross section provided with a central hole a into which a shaft portion 4a is inserted and a peripheral groove 21b that is concentrically cut around the central hole 21a. And a spring member 22 having a substantially V-shaped or U-shaped cross section that is disposed inside the peripheral groove 21b and urges both side surfaces of the peripheral groove 21b outward, and is inserted inside the peripheral groove 21b. In this state, the ring-shaped stopper member 23 presses the spring member 22 against the peripheral groove 21b by being engaged with a gap formed between the spring member 22 and the groove portion 9.
[Selection] Figure 2

Description

  The present invention relates to a dispenser device suitable for use when applying a high-viscosity liquid such as a sealer (adhesive) or grease (semi-solid lubricant).

  2. Description of the Related Art Conventionally, dispensers such as sealer guns and grease guns have been used in the automobile industry and the like when applying high viscosity liquids such as sealers (adhesives) and greases (semi-solid lubricants).

  Generally, a dispenser device includes a discharge port that discharges a liquid agent, a flow path that leads the liquid agent to the discharge port, a liquid supply mechanism that supplies the liquid agent into the flow path, a valve body that opens and closes the flow path, and a valve body. And a valve driving mechanism for driving. Then, the valve body is reciprocated in the axial direction by the valve drive mechanism to open and close the flow path, and the liquid agent pumped by the liquid agent supply mechanism is discharged from the discharge port through the flow path.

  By the way, in the conventional dispenser device, a seal member (packing or the like) is arranged so that liquid leakage does not occur from the sliding portion between the shaft portion and the shaft hole that supports the valve body movably in the axial direction. (For example, refer to Patent Documents 1 and 2.)

  Specifically, as shown in FIG. 3, for example, the conventional dispenser device has a groove portion 103 that is provided on the inner peripheral surface of the shaft hole 102 that supports the shaft portion 101 over the entire circumference. It has a seal structure in which a ring-shaped seal member 200 that is in fluid-tight sliding contact with the outer peripheral surface of the portion 101 is disposed.

  In addition, the seal member 200 includes an elastic member 201 having a substantially U-shaped cross section provided with a center hole 201a through which the shaft portion 101 is inserted and a peripheral groove 201b that is concentrically cut around the center hole 201a. A spring member 202 having a substantially U-shaped cross section is disposed inside the peripheral groove 201b and biases both side surfaces of the peripheral groove 201b outward.

  In this dispenser device, the shaft portion 100 reciprocates in the axial direction in the shaft hole 102 in accordance with the opening / closing operation of the valve body when the liquid agent is applied. At this time, in the seal member 200 slidably contacted with the outer peripheral surface of the shaft portion 101, the spring member 202 disposed inside the peripheral groove 201b of the elastic member 201 faces both side surfaces of the peripheral groove 201b outward. By energizing, the sealing (liquid-tight) property of the elastic member 201 with respect to the outer peripheral surface of the shaft portion 101 is maintained.

  Thereby, even when a highly viscous liquid agent is discharged at a high pressure, it is possible to prevent liquid leakage from the sliding portion between the shaft portion 101 and the shaft hole 102 by using the sealing member 200 described above. It has become.

JP 2010-101341 A JP 2003-247656 A

  However, in the conventional dispenser device, by repeating the opening and closing operation of the valve body described above, for example, as shown in FIG. 4, the side that is in sliding contact with the shaft portion 101 of the elastic member 201 is extended in the axial direction. The sealability at this portion is lowered, and liquid leakage may occur.

  In this case, for example, in a valve drive mechanism that drives the valve body by air pressure such as an air cylinder mechanism, the liquid leaking from the sliding portion between the shaft portion 101 and the shaft hole 102 enters the inside of the cylinder, and the air The supply / discharge hole may be blocked.

  For this reason, in the conventional dispenser device, in order to prevent the occurrence of such a liquid leakage, the above-described sealing member 200 must be frequently replaced, and there is a problem that time and cost for the maintenance increase. It was.

  The present invention has been proposed in view of such conventional circumstances, and a dispenser device capable of greatly reducing the time and cost for maintenance by extending the life of the seal member. The purpose is to provide.

In order to achieve the above object, the present invention provides the following means.
(1) a discharge port for discharging the liquid agent;
A flow path for guiding the liquid agent to the discharge port;
A liquid supply mechanism for supplying the liquid into the flow path;
A valve body for opening and closing the flow path;
A dispenser device comprising a valve drive mechanism for driving the valve body,
The valve body has a shaft portion that is supported so as to be movable in the axial direction, and a groove portion is provided over the entire circumference on the inner peripheral surface of the shaft hole that supports the shaft portion. It has a seal structure in which a ring-shaped seal member that is in fluid-tight sliding contact with the outer peripheral surface of the shaft portion is disposed on the inside,
The seal member is an elastic member having a substantially U-shaped cross section provided with a central hole through which the shaft portion is inserted, and a peripheral groove cut out concentrically around the central hole,
A spring member having a substantially V-shaped or U-shaped cross section disposed inside the peripheral groove and biasing both side surfaces of the peripheral groove toward the outside;
From a ring-shaped stopper member that presses the spring member against the peripheral groove by being fitted into a gap formed between the spring member and the groove portion while being inserted inside the peripheral groove. A dispenser device characterized by being configured.
(2) The dispenser device according to (1), wherein the outer peripheral surface of the shaft portion is subjected to WPC (Wide Peening Cleaning) processing.
(3) The valve body is a spool valve or a needle valve,
3. The dispenser device according to item (1) or (2), wherein the liquid agent is a high viscosity material.

  As described above, according to the dispenser device according to the present invention, the lifetime of the seal member can be increased, so that the time and cost for maintenance can be significantly reduced.

FIG. 1 is a cross-sectional view showing an example of a dispenser device to which the present invention is applied. FIG. 2 is a cross-sectional view showing a seal structure provided in the dispenser device shown in FIG. FIG. 3 is a cross-sectional view showing a seal structure provided in a conventional dispenser device. 4 is a cross-sectional view showing a state where the elastic member is deformed in the seal structure shown in FIG.

Hereinafter, a dispenser device to which the present invention is applied will be described in detail with reference to the drawings.
A dispenser device to which the present invention is applied is, for example, as shown in FIG. 1, a discharge port 1 that discharges a liquid agent, a flow channel 2 that guides the liquid agent to the discharge port 1, and a liquid supply that supplies the liquid agent into the flow channel 2 A mechanism 3, a valve body 4 that opens and closes the flow path 2, and a valve drive mechanism 5 that drives the valve body 4 are roughly provided.

  The discharge port 1 is provided in the front-end | tip part of 1 A of apparatus main bodies which comprise this dispenser apparatus. The shape of the protruding port 1 is not particularly limited. For example, the tip of the apparatus main body 1A may have a nozzle shape or the like, or a nozzle or the like may be separately attached to the tip of the apparatus main body 1A. is there.

  The flow path 2 includes a first hole 2a formed from the discharge port 1 to the axial direction of the apparatus main body 1A, and a second hole formed from the side surface of the apparatus main body 1A to the direction orthogonal to the axial direction. And the second hole 2b is connected to the side surface of the first hole 2a.

  The liquid agent supply mechanism 3 includes a pump that pumps a high-viscosity liquid agent while heating, and can supply the liquid agent into the flow path 2 by being connected to the second hole 2b. .

  The valve body 4 is formed of a spool valve, and is fitted in a fluid-tight manner with a shaft portion 4a supported on the proximal end side thereof so as to be movable in the axial direction, and a distal end portion of the first hole portion 2a on the distal end side thereof. The fitting portion 4b is configured to have a reduced diameter portion 4c having a diameter smaller than that of the first hole portion 2a between the shaft portion 4a and the fitting portion 4b.

  On the other hand, the apparatus main body 1A is formed with a shaft hole 6 extending in the axial direction continuously to the first hole 2a. The valve body 4 can reciprocate (slide) in the axial direction by inserting the shaft portion 4 a into the shaft hole 6.

  The valve drive mechanism 5 includes an air cylinder that drives the valve body 4 by air pressure, and includes a piston 7 attached to the proximal end side of the shaft portion 4 and a cylinder 8 that accommodates the piston 7. . In the valve drive mechanism 5, the piston 7 is in sliding contact with the inner peripheral surface of the cylinder 8 in an airtight manner, and between the one side air chamber and the other side air chamber sandwiching the piston 7 in the cylinder 8. By alternately supplying / discharging air, the valve element 4 can be reciprocated in the axial direction.

  In the dispenser device having the above-described structure, the valve body 4 is reciprocated in the axial direction by the valve drive mechanism 5 to open and close the flow path 2, and the liquid agent pumped by the liquid supply mechanism 3 is discharged through the flow path 2. It can be discharged from the outlet 1.

  Specifically, in this dispenser device, when the flow path 2 is closed, the valve body 4 is positioned above in FIG. 1 so that the fitting portion 4b is fitted into the first hole portion 2a. ing. And from this state, when the valve body 4 moves downward in FIG. 1, the fitting part 4b protrudes below the said discharge port 1, and fitting with the 1st hole 2a is cancelled | released. . As a result, the flow path 2 is opened, and the liquid agent is discharged from the discharge port 1 through the flow path 2. Then, the valve body 4 moves upward in FIG. 1 so that the flow path 2 can be closed again.

  By the way, the dispenser device to which the present invention is applied has a seal structure for preventing liquid leakage from the sliding portion between the shaft portion 4a and the shaft hole 6, as shown in FIG.

  Specifically, in this seal structure, a groove portion 9 is provided on the inner peripheral surface of the shaft hole 6 over the entire circumference, and a ring that is in fluid-tight sliding contact with the outer peripheral surface of the shaft portion 4a inside the groove portion 9. The seal member 20 is in the form of a structure.

  The seal member 20 includes an elastic member 21 having a substantially U-shaped cross section provided with a central hole 21a through which the shaft portion 4a is inserted and a peripheral groove 21b that is concentrically cut around the central hole 21a. A spring member 22 that is disposed inside the groove 21b and biases both side surfaces of the peripheral groove 21b toward the outside, and a spring member 22 that is inserted inside the peripheral groove 21b, The ring-shaped stopper member 23 presses the spring member 22 against the peripheral groove 21b by being fitted in a gap formed between the groove portion 9 and the groove portion 9.

  In this seal structure, when the shaft portion 4a reciprocates in the shaft hole 6 in the axial direction, the seal member 200 comes into fluid-tight sliding contact with the outer peripheral surface of the shaft portion 101. At this time, the spring member 22 arranged inside the peripheral groove 21b of the elastic member 21 urges both side surfaces of the peripheral groove 21b toward the outer side, so that the elastic member 21 against the outer peripheral surface of the shaft portion 4a. The seal (liquid tightness) is maintained.

  Further, in this seal structure, the stopper member 23 presses the spring member 22 against the peripheral groove 21b, thereby preventing the side of the elastic member 21 that is in sliding contact with the shaft portion 4a from being extended in the axial direction.

  Thereby, it is possible to improve the durability of the seal member 20. Further, by prolonging the life of the seal member 20, it is possible to greatly reduce the time and cost for maintenance.

  In particular, in the present invention, even when a highly viscous liquid such as a sealer (adhesive) or grease (semi-solid lubricant) is discharged at a high pressure (for example, inlet pressure: 18 MPa, outlet pressure: 5 MPa), the sealing member By using 20, it is possible to prevent liquid leakage from the sliding portion between the shaft portion 4a and the shaft hole 6 over a long period of time.

  In the present invention, it is preferable to perform WPC (Wide Peening Cleaning) processing on the outer peripheral surface of the shaft portion 4a. Thereby, it is possible to improve the slidability and the fatigue strength of the valve body 4.

  In addition, the dispenser device to which the present invention is applied is not limited to the seal structure shown in FIG. 2 described above, and causes liquid leakage from the sliding portion of the valve body 4 and air leakage from the valve drive mechanism 5. In order to prevent this, it has a seal structure in which bushes, seat rings, packings, and the like are arranged in various places.

  In the dispenser device to which the present invention is applied, a spool valve is used as the valve body 4. For example, when the valve body 4 is drawn inward from the discharge port 1, the flow path 2 is formed. The structure using the needle valve which opens and closes may be sufficient.

  Further, the seal member 20 shown in FIG. 2 is configured using the spring member 22 having a substantially U-shaped cross section, but may be configured using the spring member 22 having a substantially V-shaped cross section.

  DESCRIPTION OF SYMBOLS 1 ... Discharge port 2 ... Flow path 3 ... Liquid supply mechanism 4 ... Valve body 4a ... Shaft part 5 ... Valve drive mechanism 6 ... Shaft hole 9 ... Groove part 20 ... Seal member 21 ... Elastic member 21a ... Center hole 21b ... Surrounding groove 22 ... Spring member 23 ... Stopper member

Claims (3)

A discharge port for discharging the liquid agent;
A flow path for guiding the liquid agent to the discharge port;
A liquid supply mechanism for supplying the liquid into the flow path;
A valve body for opening and closing the flow path;
A dispenser device comprising a valve drive mechanism for driving the valve body,
The valve body has a shaft portion that is supported so as to be movable in the axial direction, and a groove portion is provided over the entire circumference on the inner peripheral surface of the shaft hole that supports the shaft portion. It has a seal structure in which a ring-shaped seal member that is in fluid-tight sliding contact with the outer peripheral surface of the shaft portion is disposed on the inside,
The seal member is an elastic member having a substantially U-shaped cross section provided with a central hole through which the shaft portion is inserted, and a peripheral groove cut out concentrically around the central hole,
A spring member having a substantially V-shaped or U-shaped cross section disposed inside the peripheral groove and biasing both side surfaces of the peripheral groove toward the outside;
From a ring-shaped stopper member that presses the spring member against the peripheral groove by being fitted into a gap formed between the spring member and the groove portion while being inserted inside the peripheral groove. A dispenser device characterized by being configured.   The dispenser device according to claim 1, wherein the outer peripheral surface of the shaft portion is subjected to WPC (Wide Peening Cleaning) processing. The valve body is a spool valve or a needle valve,
The dispenser device according to claim 1, wherein the liquid agent is a high-viscosity material.

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