KR200370807Y1 - Air tools for blind rivet - Google Patents

Abstract

The present invention relates to a blind rivet air tool, comprising: a rivet mounting tool, a first body portion located at a rear end of the rivet mounting tool and communicating with a flow path; A second body portion having a hollow structure coupled to a lower end portion of the first body portion; A piston means built in said second body portion and in communication with said flow path; An inlet valve embedded in the first body so that external high pressure fluid is introduced; A differential valve installed at an upper part to interlock with the inlet valve and embedded in the first body part; It is connected to the differential valve, and comprises a trigger valve provided to the outside of the first body portion, by supplying the compressed air introduced into the body to the lower portion of the piston panel through the through hole of the piston rod to supply the hydraulic fluid By providing a novel mechanism to operate, the pneumatic efficiency can be improved, and the effect is that it can provide strong penetrating force and ease of use to perform repetitive and continuous riveting operations.

Description

Blind Rivet Air Tools {Air tools for blind rivet}

The present invention relates to a blind rivet air tool, and more particularly, has a strong penetrating force and excellent repeatability, and operates the hydraulic fluid by supplying the compressed air introduced into the body to the lower part of the piston panel through the through hole of the piston rod. A blind rivet air tool that improves pneumatic efficiency by providing a novel mechanism for

Rivets are also called headed, metal rivets used to bond thin plates such as polymerized metal plates. Insert the plate into the drilled hole of the overlapping plate and press the headless side to crush the plate. The main difference between fastening with screws is that they cannot be disassembled or reassembled, which is a drawback of rivet joints, but unlike screwed joints, there is no risk of loosening during use.

Prior to the current development of welding technology, rivets were an indispensable part because thick steel sheets or section steels were made to form ships, boilers, and legs, but in recent years, most of the construction of large steel structures has been replaced by welding. It is becoming. However, it is still widely used in the case of thin plates that cannot be used or are difficult to use, such as the body of an aircraft or bus and a parabolic antenna for communication. For this purpose, special blind rivets that can be fastened with only one side of the plate are often used. Rivets are fastened using plastic deformation of the metal. In particular, the rivets for thin plates can be fastened at room temperature. Therefore, unlike welding, the joints are not deteriorated due to high temperature, and can be used for joining plastics or wooden boards that are weak to heat.

However, it is generally difficult to obtain airtightness such as welded joints. In recent years, various rivets have been devised with great attention to the shape and structure of shaft parts such as tube rivets and management bets in order to increase work efficiency.

A tool for efficiently utilizing such rivets is a riveting device, and mechanical, electric and hydraulic are generally widely used.

The manual maintenance riveting device driven by the battery electric motor disclosed in Korean Patent Publication No. 2002-0075854 is driven by the battery electric motor 26 and hydraulically operated riveting head 11, as shown in FIG. And a reciprocating hydraulic pump 22 driven by this electric motor. This riveting device comprises a fluid tank 23 of hydraulic fluid and the hydraulic supply line from the pump to the riveting head 11 is a fluid tank inlet valve which is normally opened to flow hydraulic fluid from the supply line to the fluid tank 23. It is connected to the fluid tank by (29).

The operation of the tool operation trigger 31 first closes the fluid tank inlet valve 29, and then turns on the electric motor 26 to operate the pump 22. The release of the tool actuation trigger 31 first turns off the electric motor 26 to stop the operation of the pump 22 and then opens the fluid tank inlet valve 29. When the fluid tank inlet valve 29 is closed by the operation of the trigger 31, it acts as a pressure relief valve to reduce the overpressure of the hydraulic fluid.

However, one method of the prior art having such a configuration is excellent in portability by forming hydraulic pressure using its own power source, while a strong penetration force is required, as well as a problem that cannot be utilized in industrial sites requiring periodic and repetitive riveting. there was.

An object of the present invention devised to solve the above problems is to provide a strong riveted air riveted air tool with excellent repeatability.

In addition, another object of the present invention is to provide a novel mechanism for supplying the compressed air introduced into the body through the through hole of the piston rod to the lower part of the piston panel to operate the hydraulic fluid, thereby providing a riveted air that can improve the pneumatic efficiency. In providing the tools.

An object of the present invention, the rivet mounting port, and the first body portion is located in the rear end of the rivet mounting port and in communication with the flow path; A second body portion having a hollow structure coupled to a lower end portion of the first body portion; A piston means built in said second body portion and in communication with said flow path; An inlet valve embedded in the first body so that external high pressure fluid is introduced; A differential valve installed at an upper part to interlock with the inlet valve and embedded in the first body part; It may be achieved by a blind rivet air tool connected to the differential valve and configured to include a trigger valve provided to the outside of the first body portion.

Preferably, the piston means of the present invention is a piston panel sealed on the inner main surface of the second body portion, a piston rod connected to the center of the piston panel, and is provided on the upper end of the piston rod, along the flow path A seal array provided to be moved.

More preferably, the present invention supports the differential valve, and further comprises an under cover to form the flow path, wherein the under cover is fastened with an inner portion of the first body portion to support the lower end of the differential valve. And a through hole through which the piston rod penetrates.

1 is a cross-sectional view showing an air tool according to the prior art.

2 is a cross-sectional view showing a blind rivet air tool according to the present invention.

<< Explanation of symbols for main part of drawing >>

110: first body portion

120: second body portion

130: piston 132: piston panel

134: piston rod 136: seal array

140: under cover

150: inlet valve 152: inlet

160: differential valve

170: differential valve housing

180: trigger valve

190: rivet launching means 192: blind rivet mounting hole

194: return spring

Hereinafter, the configuration of the present invention with reference to the drawings in detail.

2 is a cross-sectional view showing a blind rivet air tool according to the present invention.

Referring to Figure 2, the blind rivet air tool 200 according to the present invention is formed in the inner portion of the body portion 110, 120 where the pneumatic is formed so that the length of the flow path (Fpath) is short to improve the pneumatic efficiency Consists of.

The first body part 110 is provided with a rivet firing means 190 having a blind rivet mounting tool 192 formed at an upper end and a return spring 194 provided at a rear end of the blind rivet mounting tool 192. . Here, the return spring 194 is provided so that the blind rivet (not shown) mounted to the blind rivet mounting hole 192 can be returned to its original state after being fired by the pneumatic pressure supplied through the flow path Fpath. The operating oil is filled in the flow path Fpath.

In addition, the flow path Fpath is in communication with the blind rivet mounting hole 192 and is formed along the longitudinal direction of the first body part 110.

The second body portion 120 is fastened to the lower end of the first body portion 110, the piston means 130 is built.

Here, the piston means 130 is a piston panel 132 for interlocking and sealing along the inner main surface of the second body portion 120, a piston rod 134 connected to the center of the piston panel 132, and a piston rod ( It is installed in the upper end of the 134 and consists of a seal array 136 provided to move along the flow path (Fpath).

In addition, the under cover 140 is fastened to an inner portion of the first body portion 110 and provided to form a lower portion of the flow path Fpath.

The upper end of the piston rod 134 is located through the through hole of the under cover 140. Here, the through-hole penetrated in the longitudinal direction is formed in the piston rod 134.

The inlet valve 150 provided with external pneumatic pressure is installed on the upper surface of the under cover 140, and the inlet 152 of the inlet valve 150 is exposed to the outer side of the first body part 110. .

The differential valve 160 has a through hole formed in the upper surface of the inlet valve 150 and is linked by pneumatic pressure. Here, reference numeral 170 denotes a "differential valve housing". The differential valve 160 has a lower cross section with a smaller cross section than the upper portion.

The trigger valve 180 exposed to the outside of the first body part 110 is connected to the differential valve 160 described above.

Referring to the operation relationship of the air tool 200 having a configuration of the present invention as follows.

First, the inlet 152 of the compressed air supply pipe and the air tool 200 according to the present invention is connected.

Compressed air pushes up differential valve 160 through inlet 152.

Thereafter, the upper end of the differential valve 160 is in contact with the lower end of the differential valve housing 170 to prevent an increase. At this time, when the air is introduced into the through-hole of the differential valve 160 and the air is fully filled therein, the differential valve 160 The upper and lower air pressures of) remain the same.

Then, the differential valve 160 is moved downward with a relatively small cross-sectional area.

Therefore, the differential valve 160 descending toward the inlet valve 150 is blocked and all operations are stopped.

In this case, when the external force is provided to the trigger valve 180, the compressed air is decompressed to the upper portion of the differential valve 160 to increase the pressure, and the compressed air is under the cover 140 through a gap between the inlet valve 150 and the differential valve 160. The piston rod 134 is raised by providing compressed air to the lower surface of the piston panel 132 through a through hole formed in the piston rod 134 of the piston means 130 via the piston means 130 and the piston means 130.

When the piston rod 134 is raised, the seal array 136 provided on the upper portion of the piston rod 134 compresses the hydraulic oil filled in the flow path (Fpath), thereby riveting (not shown) mounted to the blind rivet fitting 192. ) Is fired.

When the external force is released to the trigger valve 180, the compressed air is blocked and the compressed air is recharged to the upper portion of the differential valve 160 so that the pressures of the upper and lower portions of the differential valve 160 are equal to the lower side of the lower cross-sectional area. Differential valve 160 in the direction is lowered to block the compressed air supplied to the inlet valve 150.

When the air supply compressed by the working oil is stopped in this way, the piston rod 134 is lowered by the reaction force of the return spring 194, and the compressed air supplied to the lower side of the piston panel 132 is formed in the piston rod 134. The air is exhausted to the outside via the gap between the differential valve 160 and the differential valve housing 170. Here, when the compressed air is completely exhausted, the operation of the air tool 200 of the present invention is stopped.

Although the present invention described above has been described with reference to some embodiments, the present invention is not limited thereto, and the present invention may be easily modified by those skilled in the art. It is obvious that it belongs to the technical idea.

The present invention having the above configuration can improve the pneumatic efficiency by providing a novel mechanism for supplying the compressed air introduced into the body to the lower part of the piston panel through the through hole of the piston rod to operate the hydraulic fluid, There is an effect that can provide ease of use that can be performed repeatedly and continuously riveting work.

Claims (3)

A rivet mounting tool, and a first body portion located at a rear end of the rivet mounting tool and communicating with a flow path; A second body portion having a hollow structure coupled to a lower end portion of the first body portion; A piston means built in said second body portion and in communication with said flow path; An inlet valve embedded in the first body so that external high pressure fluid is introduced; A differential valve installed at an upper part to interlock with the inlet valve and embedded in the first body part; A blind rivet air tool coupled to the differential valve and configured to include a trigger valve provided to the outside of the first body portion. The method of claim 1, The piston means, A piston panel sealed to an inner main surface of the second body part; A piston rod connected to the center of the piston panel, A blind rivet air tool, which is installed at an upper end of the piston rod and comprises a seal array provided to move along the flow path. The method according to claim 1 or 2, Supporting the differential valve, and further comprising an under cover to form the flow path, The under cover is fastened to the inner portion of the first body portion to support the lower end of the differential valve, A blind rivet air tool, characterized in that the through-hole is formed through the piston rod.