JPH0351168Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention is a cap that is removably attached to a holder in which a stamp head is arranged.
The present invention relates to a cap structure in which the internal space of the cap is configured to be switchable between an airtight state and a state communicating with the atmosphere, thereby allowing the cap to be attached and removed smoothly.

Prior Art Stamping devices that stamp stamps such as rubber stamps and mark marks of various shapes are
Widely used in the office field and other stationery industries. For example, for stamps such as rubber stamps, the common method of use is to transfer stamp ink to the stamp surface from a separately provided stamp stand, and then press it against the intended object to transfer (imprint) the stamp impression. It is. In addition, on the production line of various products, round,
Marks of various shapes, such as squares and triangles, are often stamped by inspectors on inspected articles.

By the way, as mentioned above, in conventionally known stamping devices, the stamp such as a rubber stamp and the paint such as stamp ink are completely separate, and it is necessary to transfer the stamp ink from the stamp pad to the stamp each time it is used. The work was extremely tedious. For this reason, recently, stamping devices that do not require a stamp stand have been commercialized, which have built-in stamp ink and are capable of stamping as is.

Problems to be solved by the invention By the way, in the above-mentioned stamping device, if the stamp is left exposed to the atmosphere, the ink impregnated in the stamp will dry and become wasted, or the dried ink will become wasteful. There is a problem in that it adheres to the stamp surface and makes it impossible to stamp a clear stamp. Therefore, when the stamp is not in use, a measure is generally taken to attach a cap to the stamping device to cover the stamp surface.

The inner diameter of the cap is set to be slightly smaller than the outer diameter of the stamping device so that the cap is kept airtight inside when attached to the stamping device. In this case, when the cap is attached to the stamping device, the inner surface of the cap and the outer surface of the stamping device are in close contact with each other, so the air inside the cap is not exhausted to the outside, which increases the internal pressure and makes it difficult to attach the cap. There is a problem. There is also a risk that the cap itself will be pushed back by the internal pressure and come off the stamping device.

Note that by deforming the cap, a gap is formed between the inner surface of the cap and the outer surface of the stamping device.
It is conceivable to deposit the material while discharging the internal air. However, at this time, the inside of the cap becomes under negative pressure, so a disadvantage is pointed out that it is difficult to remove the cap.

Purpose of the invention This invention was proposed in order to suitably solve the above-mentioned drawbacks inherent in the prior art, and provides a cap structure that allows the cap to be smoothly attached to and removed from the stamping device. The purpose is to provide

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention provides a holder in which a cartridge containing a paint filler is detachably attached to the rear end;
A paint-impregnated stamp that is slidably inserted into a cavity bored at the tip of the holder, and is always elastically biased by a compression spring so that the stamp surface faces forward from the tip of the holder. Head and
A check valve is provided in the head and opens and closes a passage communicating between the inside of the filling body and the rear end of the stamp head, and by pressing the stamp head to open the check valve, In a stamping device in which paint is supplied to a stamp head through a passage, the holder is removably attached to the tip of the holder;
an inner cap that covers the stamp head; an air vent hole drilled at the top of the inner cap; and an inner cap that is slidably attached to the outside of the inner cap;
an outer cap having a through hole that communicates with the outside; a valve body disposed on the inner surface of the outer cap facing the top of the inner cap to open and close the through hole; and the valve body and the outer cap. When a pressure higher than atmospheric pressure is applied from the inner cap side to the valve body that is elastically interposed between the inner surface and the valve body that closes the passage hole, the elasticity that allows the valve body to open the passage hole is increased. and an elastic member that is elastically interposed between the outer cap and the inner cap and causes the caps to approach each other so that the valve body closes the through hole. shall be.

Embodiments Next, the cap structure of the stamping device according to the present invention will be described below with reference to preferred embodiments and the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a stamp head, and this stamp head 10 is formed into a substantially cylindrical shape using a material such as felt, which has many pores and allows impregnation with liquid paint. be. The stamp head 10 is slidably inserted into a cavity 14 consisting of a cylindrical hole formed in the axial end of a holder 12 which forms the body of the stamping device body, and the stamp The surface 10c is configured to always project a certain distance forward from the tip of the holder.

As shown in the figure, the cylindrical hole 14 has a stepped structure consisting of a large diameter hole 14a and a small diameter hole 14b communicating with the large diameter hole 14a via a step 16. There is an opening at the tip of the holder. Further, as shown in the figure, the stamp head 10 is divided into a large diameter part 10a and a small diameter part 10b at a stepped part 18, and the small diameter part 10b is inserted into the small diameter hole 14b of the holder 12 in a substantially intimate and slidable manner. ing. The space between the stepped portion 16 of the holder 12 and the stepped portion 18 of the stamp head 10 has an appropriate restoring elasticity and functions to always project the stamp surface 10c a certain distance forward from the tip of the holder to a fixed position. A compression spring 20 is interposed.

A substantially conical seat 22 is formed at the rear end of the holder 12, and the seat 22 is connected to the small diameter of the cylindrical hole 14 through a through hole 24 bored at the innermost part of the bottom surface of the seat 22. It communicates with the hole 14b. A check valve 26 is disposed in the small diameter hole 14b, and the check valve 26 is connected to the conical spring 2 inserted into the hole 14b.
8 and has one end abutting against the rear end of the stamp head 10. The other end is inserted through the through hole 24 and faces the innermost part of the seat. The check valve 26 is configured to sit on the seat portion 22 and close the through hole 24 in a state in which the stamping device main body is oriented in any direction.

Reference numeral 32 designates a bag which is hermetically filled with paint 34 such as stamp ink, paint made of a mixture of pigments and bath agents, and this bag 32 is made of rubber or other synthetic resin with high flexibility and softness. It is made up of materials. The opening side of the bag 32 is
It is connected and fixed to the open end of a hollow cartridge 36 having the shape shown in the figure, and this cartridge 36 is removably screwed into the rear end of the holder 12, that is, the side where the seat portion 22 is formed, via a threaded portion 38. Fixed. Also, cartridge 36
A through hole 41 for air intake is bored at the top of the bag body 32, and when the cartridge is attached to the holder 12, the through hole 41 is formed in the filling paint 34 in the bag body 32.
Atmospheric pressure can be applied via 1.

As shown in FIG. 1, the tip of the stamp head side of the holder 12 is provided with
A protective collar 40 having an inner diameter slightly larger than the diameter of the large diameter portion 10a of 0 is attached. This protective collar 40 is dimensioned to such an extent that the stamp surface 10c of the stamp head 10 projects slightly forward from the tip of the collar, and is provided to guide the sliding of the stamp head 10 and protect the head. (See Figure 2).

Next, reference numeral 42 designates an inner cap provided to cover the stamp head 10 of this stamping device, and a seal ring 44 is provided around the inner surface of the inner cap 42 to attach the cap 42 to the holder 1.
2, it is tightly and reliably held. A through hole 46 for air venting is provided at the top of the inner cap 42, and an outer cap 48 is attached to the inner cap 42.

A check valve mechanism including a conical valve body 50 is disposed in the outer cap 48 as shown in the figure.
That is, this check valve consists of a conical first compression spring 52 provided inside the outer cap 48 and a conical valve body 50 elastically supported by the spring. It is inserted into the through hole 46 to close it. Also,
A second compression spring 54 is elastically interposed between the outer periphery of the inner cap 42 and the outer cap 48, and the second compression spring 54 urges both caps 42 and 48 toward each other. This functions to press the valve body 50 into contact with the through hole 46.

Note that the elasticity of the first compression spring 52 is the same as that of the holder 1.
When the inner cap 42 is attached to the inner cap 2, the internal pressure of the inner cap 42 is applied to the conical valve body 50, compressing it, and setting the value to a value that allows the through hole 46 to be opened.

On the outer periphery of the outer cap 48, the cap 4
A through hole 56 is provided to communicate the inside and outside of the housing 8 . This through hole 56 is provided when the inner cap 42 is attached to and removed from the holder 12.
It functions to communicate the interior space of the inner cap 42 with the outside (atmosphere) so that it can be easily attached and removed.

Effects of the Embodiment Next, the actual use of the cap structure of the stamping device according to the embodiment configured as described above will be explained. Prior to use, a cartridge 36 having a bag body 32 filled with a desired paint 34 selected from quick-drying ink, slow-drying ink, and various other paints is inserted through a threaded portion 38 formed in the holder 12 forming the main body of the device. It is screwed and fixed in a removable manner. The stamping device is used with its stamp surface 10c facing vertically downward, as shown in FIGS. 1 and 2. At this time, the check valve 26
is seated at the deepest part of the conical seat portion 22 and closes the through hole 24. Also, stamp head 1
0 stamp surface 10c extends slightly forward (downward in the drawing) from the tip of the protective collar 40.

Furthermore, an inner cap 42 and an outer cap 48 are attached to the tip of the holder 12. At this time, the through hole 46 of the inner cap 42 is closed by a conical valve body 50 disposed in the outer cap 48, and the internal space of the inner cap 42 is kept airtight.

For the first use, the operator must first use the holder 12.
from the tip of the inner cap 42 and outer cap 48
It is necessary to remove it. In this case, the inner cap 4
Since the inside of the cap 2 is airtight, it is difficult to remove the inner cap 42 from the holder 12 in this state. However, in the stamping device according to the embodiment,
If the outer cap 48 attached to the outside of the inner cap 42 is moved in the direction away from the inner cap 42 as shown in FIG.
The conical valve body 50, which is blocking the second through hole 46, separates from the second through hole 46 and opens it. As a result, the internal space of the inner cap 42 is
6. The inner space of the outer cap 48 communicates with the outside through the through hole 56, so that the inner space of the inner cap 42 can be at atmospheric pressure. Therefore, the inner cap 42 can be removed from the holder 12 very easily.

As shown in FIG. 4, the inner cap 42 and outer cap 48 that have been removed from the holder 12 come close to each other under the elastic action of the second compression spring 54, and the conical valve body 50 closes the through hole 46. Ru.

After removing the inner cap 42, take the stamping device and press the stamp head 10 several times, as shown in FIG.
The paint 34 in the bag body 32 enters the cylindrical hole part 14 through the through hole 24 when the bag body 32 repeatedly leaves and sits on the seat part 22, and the paint 34 enters the stamp head 1 through the through hole 24.
0 is impregnated with a predetermined amount. In addition, steel ball 30
When the paint 34 is a highly viscous paint-based paint consisting of a pigment and a bath agent, this serves to uniformly stir the paint.

Next, as shown in FIG. 2, by pressing the stamp surface 10c against the object 58 to be stamped and pressing the device body vertically downward, the stamp head 10
is guided by the protective collar 40 and retreats into the cylindrical hole 14 while compressing the compression spring 20;
This completes the imprinting of the stamp. Also, due to the retreat of the stamp head 10, the check valve 2
6 extends inward of the seat 22 through the through hole 24 (at this time, the conical spring 28
is compressed), when the tip of the check valve 26 moves away from the seat 22, the through hole 24 opens,
The paint 34 in the bag 32 is supplied into the cylindrical hole 14. However, since the internal volume of the cylindrical hole 14 is predetermined, the paint 34 is newly replenished by the amount consumed by stamping with the stamp head 10, and there is no possibility of oversupply or insufficient supply of the paint 34. do not have.

After the stamping device is used, the inner cap 42 and the outer cap 48 are attached to the holder 12, thereby completely blocking the inflow of air and preventing the stamp head 10 from drying out. Moreover, when the inner cap 42 is attached, the inner cap 42 is
2, this internal pressure is released to the outside of the outer cap 48 by a check valve consisting of a conical valve body 50 facing the through hole 46. That is,
When the inner cap 42 is attached to the holder 12, the internal pressure of the inner cap 42 gradually increases, and when this pressure becomes greater than the elasticity of the first compression spring 52 in the check valve of the outer cap 48, the through hole The valve body 50 that closes the through hole 46 is moved back to open the through hole 46 . Since the inner space of the outer cap 48 communicates with the outside through the through hole 56, the atmosphere flows into the inner cap 42, and the interior becomes atmospheric pressure, allowing the cap 42 to be attached smoothly. It is.

In this way, since the internal space of the inner cap 42 is at atmospheric pressure, the paint 34 impregnating the stamp head 10 will not push up the check valve 26 and flow back toward the bag body. In addition, the inner cap 4
When the internal space of the inner cap 2 reaches atmospheric pressure, the conical valve body 50 closes the through hole 42 due to the elasticity of the first compression spring 52, as shown in FIG. .

Furthermore, when the paint in the bag body is used up, new paint can be replenished by simply exchanging the cartridge 36. Moreover, the cartridge size is 36
Atmospheric pressure is always applied to the bag 32 filled with paint through the through hole 41 bored in the hole 41, so that the paint 34 passes through the through hole 24 at the same time as the check valve 26 opens from the seat 22. Through the stamp head 1
0 immediately. Moreover, since the paint is quantitatively replenished by the amount consumed by using the stamp head 10, even if the stamping operation is repeated continuously, the paint may run out in the stamp head 10. There is also the advantage that clear stamping is always achieved without any problems.

Effects of the Invention According to the cap structure of the stamping device according to the present invention, the internal space of the inner cap attached to the tip of the holder is configured to be switchable between an airtight state and a state communicating with the atmosphere. , the inner cap can be attached and removed smoothly. Also,
When the inner cap is attached to the holder, the internal pressure of the cap does not increase, so that the paint impregnated in the stamp head can be effectively prevented from flowing back toward the filler. Furthermore, when the inner cap is attached to the holder, the interior of the inner cap is kept airtight, thereby preventing the stamp head from drying out.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the overall structure of a stamping device employing a cap structure according to a preferred embodiment of the present invention, and FIG. FIG. 3 is an explanatory diagram showing a state in which the stamp head is facing the object and stamping. FIG. 3 is an explanatory diagram showing a state in which the inner cap and outer cap are being removed from the holder.
The figure is an explanatory view showing a state in which the inner cap and outer cap are removed from the holder. 10... Stamp head, 10c... Stamp surface, 12... Holder, 14... Hollow part, 20...
...Compression spring, 24...Through hole, 26...Check valve, 3
2...Bag body, 34...Paint, 36...Cartridge, 42...Inner cap, 46...Through hole, 48...
...outer cap, 50...conical valve body, 52...first
Compression spring, 54...Second compression spring, 56...Through hole.

Claims (1)

[Claims for Utility Model Registration] A holder 12 in which a cartridge 36 containing a paint filler 32 is removably attached to the rear end;
The paint is slidably inserted into a cavity 14 bored at the tip of the holder 12, and is always elastically biased by a compression spring 20 so that the stamp surface 10c faces forward from the tip of the holder. An impregnating stamp head 10, and a check valve 2 provided in the head 10 to open and close a passage 24 communicating between the inside of the filling body and the rear end of the stamp head.
6, the stamping device is configured to supply paint 34 to the stamp head 10 through the passage 24 by pressing the stamp head 10 and opening the check valve 26, the tip of the holder 12 An inner cap 4 is detachably attached to the stamp head 10 and covers the stamp head 10.
2, a through hole 46 for air venting formed at the top of the inner cap 42, and an outer cap 48 slidably attached to the outside of the inner cap 42 and having a through hole 56 communicating with the outside. a valve body 50 disposed on the inner surface of the outer cap 48 facing the top of the inner cap 42 and closing the through hole 46 in a freely openable and closable manner; When a pressure higher than atmospheric pressure is applied from the inner cap side to the valve body 50 which is installed in the valve body and closes the through hole 46, the elasticity is set to allow the valve body 50 to open the through hole 46. An elastic member 52 is elastically interposed between the outer cap 48 and the inner cap 42, and the valve body 50 allows the through hole 46 to be closed.
1. A cap structure for a stamping device, characterized in that it is comprised of an elastic member 54 that brings both caps 42 and 48 close to each other so as to close the cap.