JP2001353681A - Suction pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure sucking by a suction pad for sucking and conveying a variety of members having rugged members. SOLUTION: The suction pad has a body part made of a flexible material having a through-hole formed in its axial direction with a suction nozzle connected to the rear end of the body part; an outer increased diameter part formed about the through-hole integrally with the outer periphery of the body part, with the diameter of the increased diameter part increasing toward its front end; and an inner increased diameter part formed about the through-hole integrally with the outer periphery of the body part and located inside the outer increased diameter part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction pad used for sucking and conveying various members.

[0002]

2. Description of the Related Art Conventionally, for example, various electronic components are mounted on a printed circuit board. In such a mounting technique, as shown in FIG.
Thus, the electronic component 2 is sucked and transported to a predetermined position on a printed circuit board.

[0003]

However, according to such a conventional suction method, as shown in FIG. 6, if the unevenness 3b is present on the suction surface 3a of the electronic component 3, the suction nozzle 1 will not work.
4 between the tip surface 1a of the electronic component 3 and the suction surface 3a of the electronic component 3.
Is formed, and there is a problem that the suction force is reduced due to air leakage from the gap 4 and it becomes difficult to reliably transport the electronic component 3 to a predetermined position.

[0004] Examples of electronic components having irregularities on the suction surface include an unsealed type transformer. The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a suction pad that can reliably suck a member to be sucked having irregularities or the like.

[0005]

According to a first aspect of the present invention, there is provided a suction pad made of a flexible material, having a through hole formed in an axial direction and having a rear end connected to a suction nozzle, and an outer periphery of the main body. An outer enlarged portion formed integrally with the through hole as a center and sequentially enlarged toward the tip, and an outer enlarged portion formed integrally around the through hole on the outer periphery of the main body portion inside the outer enlarged portion. And an inner enlarged diameter portion to be positioned.

According to a second aspect of the present invention, in the suction pad according to the first aspect, a bellows portion is formed between a rear end side of the main body and the outer enlarged diameter portion. . The suction pad of the third aspect is the first or second aspect.
The suction pad according to any one of the preceding claims, wherein a tip portion of the inner enlarged portion is located deeper than a tip portion of the outer enlarged portion.

A suction pad according to a fourth aspect of the present invention is the suction pad according to any one of the first to third aspects, wherein the distal ends of the outer enlarged diameter portion and the inner enlarged diameter portion are formed in an arc-shaped cross section. It is characterized by becoming. A suction pad according to a fifth aspect of the present invention is the suction pad according to any one of the first to fourth aspects, wherein a tip of the main body portion is positioned deeper than a tip portion of the inner enlarged-diameter portion. It is characterized by.

According to a sixth aspect of the present invention, there is provided the suction pad according to any one of the first to fifth aspects, wherein an irregularity is formed at a tip of the main body. The suction pad according to claim 7 is the suction pad according to claims 1 to 6.
3. The suction pad according to claim 1, wherein a communication hole is formed between the outer enlarged diameter portion and the inner enlarged diameter portion of the main body portion.

The suction pad according to an eighth aspect of the present invention is the suction pad according to any one of the first to seventh aspects, wherein a communication hole is formed between a tip of the main body and the inner enlarged diameter portion. It is characterized by becoming.

(Function) In the suction pad according to the first aspect, the main body to which the suction nozzle is connected is formed with an outer enlarged diameter portion which is sequentially enlarged toward the tip, and is further provided inside the outer enlarged diameter portion. An inner enlarged portion is formed. Then, when air is sucked from the suction nozzle, the distal end portion of the outer enlarged diameter portion and the distal end portion of the inner enlarged diameter portion are brought into close contact with the surface of the member to be attracted.

In the suction pad according to the second aspect, a bellows portion is formed between the rear end side of the main body portion and the outer enlarged diameter portion. Then, when the outer enlarged diameter portion and the inner enlarged diameter portion are pressed against the to-be-adsorbed member at a pressure equal to or higher than a predetermined pressure, the bellows portion is deformed, and the impact on the to-be-adsorbed member is reduced. In the suction pad according to the third aspect, the distal end of the inner enlarged diameter portion is positioned deeper than the distal end of the outer enlarged diameter portion.

[0012] Then, at the time of suction of the to-be-sucked member, the tip of the outer enlarged-diameter portion comes into close contact with the to-be-sucked member, and then the tip of the inner enlarged-diameter portion comes into close contact with the to-be-sucked member. On the other hand, at the time of detachment of the attracted member, the distal end of the inner enlarged diameter portion detaches from the attracted member, and then the distal end of the outer enlarged diameter portion detaches from the attracted member. In the suction pad according to the fourth aspect, the distal ends of the outer enlarged diameter portion and the inner enlarged diameter portion are formed in an arc-shaped cross section.

When the member to be sucked is sucked, the distal ends of the outer enlarged diameter portion and the inner enlarged diameter portion having a circular cross section are brought into close contact with the attracted member. In the suction pad according to the fifth aspect, the distal end of the main body is located behind the distal end of the inner enlarged diameter portion. Then, at the time of suction of the to-be-sucked member, the front end of the inner enlarged-diameter portion is in close contact with the to-be-sucked member, and then the front end of the main body is in close contact with the to-be-sucked member.

On the other hand, when the to-be-sucked member is detached, the tip of the inner enlarged-diameter portion is detached from the to-be-sucked member after the tip of the main body is detached from the to-be-sucked member. In the suction pad according to the sixth aspect, irregularities are formed at the tip of the main body. Then, when the to-be-adsorbed member is adsorbed, the tip of the main body is prevented from slipping relative to the to-be-adsorbed member.

In the suction pad according to the present invention, a communication hole is formed between the outer enlarged diameter portion and the inner enlarged diameter portion of the main body, and the communication hole ensures that air near the inside of the outer enlarged diameter portion is inside. It is sucked. In the suction pad according to the eighth aspect, a communication hole is formed between the tip of the main body and the inner enlarged diameter portion, and the air near the inside of the inner enlarged diameter portion is reliably sucked by the communication hole.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the suction pad of the present invention. The suction pad of this embodiment is made of natural rubber (NR), nitrile rubber (N
(BR), fluorine rubber (FKM), and urethane rubber (U).

1 to 3, reference numeral 11 denotes a main body. At the center of the main body 11, a through hole 11a is formed in the axial direction. At the rear end of the main body 11, a circular mounting hole 11b into which the front end of the suction nozzle 13 is fitted is formed. Mounting hole 11b of main body 11
A bellows portion 11c is integrally formed below the lower part.

The diameter of the through-hole 11a is gradually increased in a trumpet shape toward the tip below the bellows portion 11c. Below the bellows portion 11c of the main body 11, an outer enlarged diameter portion 15 is formed in an umbrella shape.

The outer enlarged diameter portion 15 is formed integrally with the outer periphery of the main body 11 around the through hole 11a, and is gradually enlarged toward the tip. Tip 15a of outer enlarged diameter portion 15
Are formed in an arc-shaped cross section. Also, the outer enlarged diameter portion 1
Below the 5, an inner enlarged diameter portion 17 is formed in an umbrella shape. The inner enlarged diameter portion 17 is integrally formed around the through hole 11 a on the outer periphery of the main body 11, and is located inside the outer enlarged diameter portion 15.

The tip portion 17a of the inner enlarged diameter portion 17 is formed in an arc-shaped cross section. The main body 11 protrudes from the inner enlarged diameter portion 17 to form a protruding portion 11d. A knurled unevenness 11e is formed at the tip of the protrusion 11d. In this embodiment, the distal end portion 17a of the inner enlarged diameter portion 17 is located behind the distal end portion 15a of the outer enlarged diameter portion 15.

Further, the distal end of the protruding portion 11d of the main body 11 is located behind the distal end portion 17a of the inner enlarged diameter portion 17. That is, in this embodiment, the distal end portion 17a of the inner enlarged diameter portion 17 is located at a position where the dimension in the axial direction is H1 from the distal end portion 15a of the outer enlarged diameter portion 15. The tip of the protruding portion 11d is located at a position where the dimension in the axial direction is H2 from the tip 15a, and the dimension H2 is
It is larger than the dimension H1.

A first communication hole 11f is formed between the outer enlarged diameter portion 15 and the inner enlarged diameter portion 17 of the main body portion 11. Further, a second communication hole 11h is formed in the protruding portion 11d at the tip of the main body 11. The hole diameter of the second communication hole 11h is larger than the hole diameter of the first communication hole 11f.

The height of the suction pad of this embodiment from the rear end of the main body 11 to the tip 15a of the outer enlarged portion 15 is, for example, 10 mm. Has an outer diameter of, for example, 10 mm.
A suction nozzle 13 of an SMD mounting device for mounting electronic components on a printed circuit board is connected to the mounting hole 11b of the suction pad and used.

FIG. 4 shows a state in which the to-be-sucked member 19 is sucked by using the above-mentioned suction pad. A first convex portion 19b having a height of, for example, 0.2 mm and an outer diameter of approximately 0.5 mm to 1.0 mm is formed at the center of the suction surface 19a of the member 19 to be sucked. Also, the first convex portion 1
An arc-shaped second protrusion 19c smaller than the first protrusion 19b is formed on the left side of 9b.

Then, the tip portion 17a of the inner enlarged diameter portion 17 is located on the upper surface of the second convex portion 19c, and the first convex portion 19b
The tip of the protruding portion 11 d of the main body 11 is located on the upper surface of the main body 11. Air is sucked in the direction of the arrow in FIG. 4 by the suction nozzle 13, and the distal end of the outer enlarged diameter portion 15, the inner enlarged diameter portion 17, and the protruding portion 11 d of the main body 11 are attached to the suctioned member 1.
9.

In the suction pad described above, the suction nozzle 13
Is formed on the body portion 11 to which the outer diameter-enlarged portion 15 is sequentially expanded toward the front end, and further, the inner diameter-enlarged portion 17 is formed inside the outer diameter-enlarged portion 15, so that the attracted member 19
Even when there are irregularities on the surface, air leakage is reduced, and the to-be-adsorbed member 19 having the irregularities can be surely adsorbed.

That is, in the state shown in FIG.
Since the distal end portion 17a of the inner enlarged diameter portion 17 is located on the upper surface of 9c, there is a possibility that some air leakage may occur at the distal end portion 17a of the inner enlarged diameter portion 17; In addition, since the tip of the protruding portion 11d of the main body 11 is in close contact with the to-be-adsorbed member 19, even if the first and second convex portions 19b and 19c are present on the attraction surface 19a of the to-be-adsorbed member 19, Regardless, the to-be-sucked member 19 can be reliably sucked.

In the suction pad described above, the main body 1
Since the bellows portion 11c is formed between the rear end side of the member 1 and the outer enlarged diameter portion 15, the impact on the member to be sucked 19 can be reduced by deformation of the bellows portion 11c. That is,
If a pressure equal to or more than a predetermined pressure acts on the tip of the main body 11 via the suction nozzle 13 due to a malfunction of the apparatus or a dimensional error of the attracted member 19, the bellows portion 11c is deformed in a contracting direction. 19 can be reduced.

Further, in the suction pad described above, after the tip 15a of the outer enlarged diameter portion 15 comes into close contact with the to-be-adsorbed member 19, the tip 17a of the inner enlarged diameter portion 17 comes into close contact with the to-be-adsorbed member 19. The distal end portion 15a of the outer enlarged diameter portion 15 is attached to the suctioned member 19 without being disturbed by the inner enlarged diameter portion 17.
Can be surely adhered. In addition, the member to be sucked 19
When the distal end portion 17a of the inner enlarged diameter portion 17 separates from the member 19 to be sucked, the distal end portion 1 of the outer enlarged diameter portion 15 is removed.
Since 5a is detached from the to-be-adsorbed member 19, the to-be-adsorbed member 19 can be reliably detached.

Similarly, after the distal end portion 17a of the inner enlarged portion 17 comes into close contact with the to-be-adsorbed member 19, the tip of the main body portion 11 comes into close contact with the to-be-adsorbed member 19. The tip portion 17a of the inner enlarged diameter portion 17 can be securely brought into close contact with the to-be-adsorbed member 19 without being obstructed. When the to-be-sucked member 19 is detached, after the tip of the main body 11 has been detached from the to-be-sucked member 19, the inner enlarged diameter portion 1
Since the tip portion 17a of the 7 is detached from the attracted member 19, the attracted member 19 can be reliably detached.

In the suction pad described above, the distal end portions 15a, 17a of the outer enlarged diameter portion 15 and the inner enlarged diameter portion 17 are provided.
Is formed in an arc-shaped cross section, so that the outer enlarged diameter portion 15 and the inner enlarged diameter portion 17 can be securely brought into close contact with the to-be-adsorbed member 19.

That is, as shown in FIG. 4, even when the outer enlarged diameter portion 15 and the inner enlarged diameter portion 17 are deformed by being pressed by the to-be-adsorbed member 19, the distal end portions 15a, 1 having an arc-shaped cross section are provided.
7a always adheres to the to-be-adsorbed member 19, and the adhesion can be improved. Furthermore, in the above-mentioned suction pad, since the unevenness 11e is formed at the tip of the main body 11, the tip of the main body 11 does not slip on the to-be-sucked member 19 when the to-be-sucked member 19 is sucked. 11
Can be securely brought into close contact with the to-be-adsorbed member 19.

Since the tip of the main body 11 is brought into close contact with the to-be-adsorbed member 19, it is ensured that the tips 15a, 17a of the outer enlarged-diameter portion 15 and the inner enlarged-diameter portion 17 are greatly deformed by a predetermined amount or more. Can be prevented. Further, in the above-described suction pad, since the first communication hole 11f is formed between the outer enlarged diameter portion 15 and the inner enlarged diameter portion 17 of the main body portion 11, air near the inner side of the outer enlarged diameter portion 15 is reliably formed. Therefore, the outer enlarged diameter portion 15 can be reliably sucked to the sucked member 19.

Similarly, since the second communication hole 11h is formed between the front end of the main body 11 and the inner enlarged diameter portion 17, air in the vicinity of the inner enlarged diameter portion 17 can be reliably sucked. Is possible, and the inner enlarged diameter portion 17 can be surely sucked to the sucked member 19. In the suction pad described above, the lower part of the through hole 11a formed in the main body 11 is formed in a trumpet shape, so that the suction force can be improved.

In the above-mentioned suction pad, the diameter of the second communication hole 11h is larger than that of the first communication hole 11f.
It is possible to make it easy to move according to the unevenness of the surface. In the above-described embodiment, an example in which the present invention is applied to a suction pad for transporting electronic components has been described. However, the present invention is not limited to such an embodiment. It can be widely applied to suction pads for transportation and the like.

Further, in the above-described embodiment, an example in which the suction pad is formed of soft rubber has been described. However, the present invention is not limited to this embodiment. For example, the suction pad may be formed of a flexible material such as a soft resin. It may be formed.

[0037]

As described above, in the suction pad according to the first aspect, an outer enlarged portion which is sequentially enlarged toward the tip is formed in the main body to which the suction nozzle is connected, and further, the outer enlarged portion is formed. Since the inner enlarged-diameter portion is formed inside the diameter portion, even when the to-be-adsorbed member has unevenness or the like, air leakage is reduced, and the to-be-adsorbed member having the unevenness or the like can be reliably sucked.

According to the second aspect of the present invention, since the bellows portion is formed between the rear end side of the main body and the outer enlarged diameter portion, the impact on the member to be sucked can be reduced by deforming the bellows portion. it can. In the suction pad according to the third aspect, since the distal end portion of the inner enlarged diameter portion is closely attached to the attracted member after the distal end portion of the outer enlarged diameter portion is adhered to the attracted member, the suction is hindered by the inner enlarged diameter portion. The tip of the outer enlarged-diameter portion can be securely brought into close contact with the member to be attracted without the need.

Further, when the to-be-adsorbed member is detached, the distal end of the inner enlarged-diameter portion is detached from the to-be-adsorbed member, and then the distal end of the outer enlarged-diameter portion is detached from the to-be-adsorbed member. Can be withdrawn. In the suction pad according to the fourth aspect, since the distal end portions of the outer enlarged diameter portion and the inner enlarged diameter portion are formed in an arc-shaped cross section, the outer enlarged diameter portion and the inner enlarged diameter portion are formed as follows.
It can surely adhere to the member to be sucked.

In the suction pad according to the fifth aspect, after the distal end of the inner enlarged-diameter portion comes into close contact with the to-be-adsorbed member, the tip of the main body is brought into close contact with the to-be-adsorbed member. The tip of the inner enlarged diameter portion can be securely brought into close contact with the to-be-adsorbed member without the need.

Further, when the to-be-sucked member is detached, the tip of the inner enlarged diameter portion is detached from the to-be-sucked member after the tip of the main body is detached from the to-be-sucked member. be able to. In the suction pad of claim 6,
Since irregularities are formed at the tip of the main body, the tip of the main body does not slip on the to-be-adsorbed member when the to-be-adsorbed member is adsorbed. it can.

According to the suction pad of the present invention, since the communication hole is formed between the outer enlarged diameter portion and the inner enlarged diameter portion of the main body, the air near the inner side of the outer enlarged diameter portion can be reliably sucked. This makes it possible to reliably suck the outer enlarged diameter portion to the member to be sucked. In the suction pad according to the eighth aspect, since the communication hole is formed between the front end of the main body and the inner enlarged diameter portion, it is possible to reliably suck air near the inside of the inner enlarged diameter portion,
The inner enlarged-diameter portion can be reliably sucked to the member to be sucked.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a suction pad of the present invention.

FIG. 2 is a side view showing the suction pad of FIG. 1;

FIG. 3 is a front view showing the suction pad of FIG. 1;

FIG. 4 is an explanatory view showing a state in which a member to be sucked is sucked by the suction pad of FIG. 1;

FIG. 5 is an explanatory view showing a conventional method of sucking an electronic component.

FIG. 6 is an explanatory view showing a conventional method of sucking an electronic component.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Main body part 11a Through-hole 11c Bellows part 11e Irregularity 11f 1st communication hole 11h 2nd communication hole 13 Suction nozzle 15 Outside large diameter part 15a Tip part 17 Inside large diameter part 17a Tip part

Claims (8)

[Claims] 1. A main body made of a flexible material and having a through hole formed in the axial direction and connected to a suction nozzle at a rear end, and a tip integrally formed around the through hole on the outer periphery of the main body. And an inner enlarged portion that is formed integrally with the outer periphery of the main body around the through hole and that is positioned inside the outer enlarged portion. A suction pad characterized by the following. 2. The suction pad according to claim 1, wherein a bellows portion is formed between a rear end side of the main body and the outer enlarged diameter portion. 3. The suction pad according to claim 1, wherein a distal end of the inner enlarged diameter portion is located deeper than a distal end of the outer enlarged diameter portion. pad. 4. The suction pad according to claim 1, wherein the outer enlarged diameter portion and the inner enlarged diameter portion have a distal end formed in an arc-shaped cross section. Suction pad. 5. The suction pad according to claim 1, wherein a tip of the main body is located at a position deeper than a tip of the inner enlarged diameter portion. Suction pad. 6. The suction pad according to claim 1, wherein an irregularity is formed at a tip of the main body. 7. The suction pad according to claim 1, wherein a communication hole is formed between the outer enlarged portion and the inner enlarged portion of the main body. Features suction pads. 8. The suction pad according to claim 1, wherein a communication hole is formed between a tip of the main body and the inner enlarged diameter portion. Suction pad.