JPH059098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a piston type supply device used for supplying a viscous substance such as an adhesive.

[Prior Art] For example, when surface-mounting chip parts using adhesive, if you try to make modifications after the adhesive has hardened, you will have to remove the part, reapply new adhesive, and then remount the part. Must be installed.
In such a case, only a small amount of adhesive is applied, and an apparatus 101 as illustrated in FIG. 2 is used as an application means for this purpose. This device 101 has a piston 104 made of hard rubber placed inside an outer cylinder 103 equipped with a supply needle 102 and an O-ring 104.
05 so as to be slidable. An adhesive 106, which is a viscous substance, is stored inside the outer cylinder 103, and by pressing a piston 104 with a manually operated rod 107, the adhesive 106 is pushed out from the tip of the supply needle 102. I have to.

[Problem to be solved by the invention] Since the adhesive 106 as a viscous substance is generally cured by heat or infrared rays, if left at room temperature for a long time, the O-ring 105 of the device 101 may become attached to the outer cylinder 1.
03, and a problem occurred in that a large force was required to move the piston 104 to supply the adhesive 106.

Further, when the adhesive 106 is housed in the outer cylinder 103, it is impossible to avoid air being mixed into the adhesive 106. Therefore, when the temperature rises, the air inside the adhesive 106 expands and the outer cylinder 103
In some cases, the internal pressure increased and the adhesive 106 flowed out from the tip of the supply needle 102.

[Means for Solving the Problems] A viscous substance supply device according to the present invention includes a case member that supplies the viscous substance stored inside to the outside from a supply hole, and a case member that is slidably provided inside the case member. a first piston member; a second piston member slidably provided on the first piston member and protruding into the case member; and the first piston member and the second piston member. The present invention is characterized by comprising a return means that is interposed between the case member and the second piston member and returns the second piston member protruding into the inside of the case member to its original position.

[Operation] When the second piston member is pressed against the return means, the second piston member is pushed into the adhesive stored in the case member, and the first piston member is also pushed in the same direction. You can proceed. Compared to the first piston member that is slidably provided in the case member, the second piston member provided in the first piston member has a smaller area of receiving pressure from the adhesive. The operation of press-fitting the component into the adhesive can be carried out with a relatively small force, and the required amount of adhesive is forced out through the supply hole.
Next, when the force applied to the second piston member is removed, the second piston member that has been pushed into the adhesive within the case member is pulled out of the adhesive by the return force of the return means. The object is moved in the direction of the object. As a result, a negative pressure is generated inside the case member, so that excess adhesive does not flow out from the supply hole.

[Example] Adhesive 2 supply device 1 which is an example of the present invention
(Apparatus 1) will be explained with reference to FIG.

The outer cylinder 3 as a case member has a substantially cylindrical shape.
The proximal end side of the outer cylinder 3 is open and provided with a flange 4 on which a finger can be placed during operation. Further, a supply hole 5 is formed on the distal end side, and a supply needle 6 is attached thereto.

Inside the outer cylinder 3, there is a first opening from the proximal opening.
A cylindrical inner tube 7, which is a piston member, is inserted. Two O-rings 8 are provided on the outer periphery of the tip of the inner cylinder 7, and are slidably in contact with the inner peripheral surface of the outer cylinder 3 while maintaining a sealed state.

A push rod 9, which is a second piston member, is provided at the center of the inner cylinder 7 with its axes aligned with each other. The push rod 9 is slidably supported by a center hole 10 provided in the front end surface of the inner cylinder 7 and a guide hole 12 of a cap 11 attached to the rear end of the inner cylinder 7. Further, an O-ring 13 is provided in the center hole 10 of the front end surface of the inner cylinder 7, and the push rod 9 is sealed in this portion. Further, a pressing plate 14 is provided at the base end of the push rod 9 that protrudes outside the inner cylinder 7 and the outer cylinder 3, and the pressing plate 14 and the cap 11 of the inner cylinder 7
A push rod 9 of a compression coil spring 15 as a return means is extrapolated between the two. As shown in the figure, in the original position of the push rod 9 where the compression coil spring 15 is not bent, the tip of the push rod 9 slightly protrudes from the front end surface of the inner cylinder 7.

In the above configuration, the adhesive 2 as a viscous substance is stored inside the outer cylinder 3, and the inner cylinder 7
The front end surface of is in contact with adhesive 2.

Next, the operation of the above configuration will be explained.

According to the device 1 of this embodiment, even adhesives that are highly viscous and are about to harden can be easily supplied with one hand. First, two fingers (index finger and middle finger)
is hung on the flange 4 of the outer cylinder 3, and the device 1 is supported with the thumb placed on the pressing plate 14 of the push rod 9.

Next, the push rod 9 is pressed through the pressing plate 14 while compressing the compression coil spring 15.
The push rod 9 protrudes from the inner cylinder 7 and is pushed into the adhesive 2 in the outer cylinder 3, creating a positive pressure inside the outer cylinder 3. In addition, the inner cylinder 7 is equipped with a compression coil spring 15.
It receives a pressing force through the push rod 9 and moves in the same direction as the push rod 9. In this case, the stroke of the inner cylinder 7 is smaller than the stroke of the push rod 9. Also,
If the press plate 14 is further pressed after pushing the push rod 9 all the way, the push rod 9 and the inner cylinder 7 will move together.

Compared to the inner cylinder 7 which is slidably provided in the outer cylinder 3, the rod-shaped push rod 9 provided in the inner cylinder 7 is
The area receiving pressure from the adhesive 2 is much smaller. Therefore, even if the viscosity of the adhesive 2 is quite high, the push rod 9 can be easily attached to the adhesive 2.
The operation of press-fitting into the adhesive can be performed with a relatively small force, and the required amount of adhesive 2 can be easily pushed out through the supply hole 5 and the supply needle 6.

Next, remove your finger from the press plate 14 to remove the force applied to the push rod 9. The push rod 9 that was pushed into the adhesive 2 inside the outer cylinder 3 is
The return force of the compression coil spring 15 pulls it out of the adhesive 2 and returns it to its original position, creating negative pressure inside the outer cylinder 3. This prevents excess adhesive 2 from flowing out from the supply hole 5 and supply needle 6 even if the air in the adhesive 2 expands due to a rise in temperature. .

According to this embodiment, the inner cylinder 7 has adhesive 2 on the front end surface.
Because they stand still as if they are always in contact,
By pressing the push rod 9, a desired amount of adhesive 2 can be easily pushed out at any time. Also,
The push rod 9 and the inner cylinder 7 are not in contact with each other over the entire axial length of the inner cylinder 7, but are in contact only at two locations, the center hole 10 and the guide hole 12. Therefore, even if the adhesive 2 hardens in the center hole 10, the area of adhesion between the push rod 9 and the inner cylinder 7 is small, so there is no risk that the push rod 9 will become inoperable.

Although the embodiment described above relates to an adhesive supply device, the present invention can be applied not only to adhesives but also to other viscous substances such as concrete repair agents.

[Effects of the invention] The present invention provides a first piston member within a case member containing a viscous substance, further provides a second piston member in this piston member, and provides a return means in the second piston member. This allows the second piston member to return to its original position when pressing is stopped. Therefore, the present invention has the following effects.

(1) A desired amount of viscous substance can be easily supplied with a relatively small force by one-handed operation.

(2) Less leakage of viscous substances when not in use.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional feeding device as an example. 1... Supply device (device), 2... Adhesive as a viscous substance, 3... Outer cylinder as a case member, 5
... Supply hole, 7 ... Inner cylinder as first piston member, 9 ... Push rod as second piston member, 15 ... Compression coil spring as return means.

Claims (1)

[Scope of utility model registration request] a case member for supplying a viscous substance stored inside to the outside from a supply hole; a first piston member slidably provided inside the case member; and a first piston member slidably provided on the first piston member. a second piston member interposed between the first piston member and the second piston member and protruding into the case member; A viscous substance supply device comprising a return means for returning a member to its original position.