JPH0244556Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a chip loading head in a chip loading machine.

Prior Art A conventional chip component mounting head is constructed as shown in FIG. In FIG. 2, the lower end of an arm 2 is fixed to the side surface of the head base 1, and an air cylinder 3 is fixed to the upper part of the arm 2 with the rod facing downward. Further, the head base 1 is provided with a hollow portion 4, and this hollow portion 4 is connected to a vacuum port 5 (hereinafter referred to as a suction hole) connected to a vacuum source. A slider 6 is slidably provided in the hollow portion 4 of the head base 1, and a slider spring 8 is installed between the screw 7 at the upper end of the slider 6 and the top of the head base 1, and constantly urges the slider 6 upward. ing. Further, the slider 6 has a hollow section 9 with an open end at the bottom, and a hole 9a communicating with the hollow section 4 of the base head 1 is provided in the upper part of the hollow section 9. The upper end of a suction bit 10 having a hollow part 11 in the axial direction is slidably inserted into the hollow part 9 of the slider 6, and the suction bit 10 is pushed downward by a damper spring 12 inserted into the hollow part 9 of the slider 6. Being pushed. Further, a screw 13 is fixed to the side of the suction bit 10, and by inserting this screw 13 into a groove 9b communicating with the hollow part 9 of the slider 6, the suction bit 10 does not come out from the hollow part 9 of the slider 6. It is configured as follows.

The operation of this conventional chip component mounting head is such that when air is sucked from the suction hole 5 of the head base 1 and air is supplied to the air cylinder 3, the slider 6 is lowered and the suction port 11 of the suction bit 10 is sucked.
When a comes to the top of the component 14, the component 14 is attracted to the suction port 11a of the suction bit 10 by drawing air from the suction port 11a.

Problems to be Solved by the Invention However, in this chip component mounting head, since the hollow part 11 of the suction bit 10 communicates with the hollow part 9 of the slider 6, the damper spring 12 attached to this hollow part 9 It is necessary to make it as weak as possible to ensure stability when picking up the component 14, but if the degree of vacuum during this picking is increased,
There was a problem in that the suction bit 10 was raised due to the degree of vacuum in the hollow part 9, making it impossible to suction the component 14.

Means for Solving the Problems In order to solve the above problems, the present invention includes a head base having a suction hole connected to a vacuum source and a cylinder on the top, and a head base that is slidably mounted on the head base. a slider which is biased upwardly by a slider spring and whose lower end is open to form a hollow part in the axial direction; the hollow part of the slider has a rod part and a hollow part having a suction port at the lower end; A part of the sliding part is slidably inserted, is urged downward by a damper spring, and is comprised of a suction bit in which a sliding member is airtightly provided at the upper end of the rod part. .

Function According to the present invention, since the sliding member that slides in the hollow part of the slider is provided at the upper end of the upper rod of the suction bit 10, even if the vacuum of the suction bit 10 is increased, the sliding member and the suction This only increases the degree of vacuum between the upper part of the sliding part of the bit and does not affect the damper spring, so even if the damper spring is set to a weak setting, high vacuum suction is possible.

Embodiment FIG. 1 is a sectional view of a chip component tower mounting head according to an embodiment of the present invention, in which 1 is a head base, 2 is an arm, 3 is an air cylinder, 4 is a hollow part, 5 is a suction hole, and 6 is a slider. , 7 is a screw, 8 is a slider spring, 9 is a hollow part, 9a is a hole, 9b is a groove, 13
14 is a screw, and 14 is a component. Since these structures are the same as those of the conventional example, a description thereof will be omitted. In this embodiment, the suction bit 15 has a rod portion 16 at the top.
A sliding part 18 having a hollow part 17 is provided at the lower part. Further, a sliding member 19 is provided at the end of the rod portion 16 in an airtight manner against the inner wall of the slider 6, and furthermore, a hollow portion 2 at the upper portion of the sliding member 19 is provided.
A damper spring 12 is provided between the top of 2 and the top of the sliding member 19. In addition, the hollow part 2
An open hole 21 is provided in order for the hole 2 to communicate with the outside air.

In the chip component mounting head of this embodiment constructed in this manner, when air is supplied to the air cylinder 3 and the piston rod is projected downward, the slider 6 is lowered. At that time, the suction hole 5 is connected to a vacuum source, and the hollow part 4 of the head base 1 and the slider 6 are
The hollow part 9 and the hollow part 17 of the sliding part 18 of the suction bit 15 are communicated with each other and are in vacuum, but even if the vacuum is strengthened, the inside of the hollow part 9 of the slider 6 will not be suctioned. Bit 15 rod part 1
Since the vacuum is only strengthened between the sliding member 19 of No. 6 and the upper part of the sliding portion 18, no force is applied in the direction of moving the suction bit 15. Therefore, even if the force of the damper spring 12 provided above the sliding member 19 is weak, the suction bit 15 is always pressed downward by the damper spring 12, and the part 1
4 height differences can be absorbed.

In this way, in the chip component mounting head of this embodiment, the vacuum applied inside the slider 6 does not act as a force to push up the suction bit 15, so no matter how high the degree of vacuum inside the slider 6 is, the damper spring 12 cannot be pushed up. It can be operated normally.

Effects of the invention As is clear from the above explanation, the present invention has a sliding member that slides within the hollow part of the slider at the upper end of the rod at the top of the suction bit. The vacuum will only become stronger between the member and the upper part of the sliding part of the suction bit.
Since no force is applied in the direction of moving the suction bit, and even if the vacuum is increased, the damper spring is not affected, so there is an advantage that high vacuum suction is possible even if the damper spring is set to be weak.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a chip component loading head according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional chip component loading head. 1...Head base, 2...Arm, 3...Air cylinder, 4...Hollow part, 5...Vacuum port,
6...Slider, 7...Screw, 8...Slider spring, 9...Hollow part, 9a...Hole, 9b...
Groove, 13...Screw, 14...Part, 15...Adsorption bit, 16...Rod part, 17...Hollow part, 1
8...Sliding part, 19...Sliding member, 21...Open hole.

Claims (1)

[Scope of utility model registration request] The head base has a suction hole connected to a vacuum source and has a cylinder on the top.The head base is slidably mounted on the head base and is biased upward by a slider spring, and the lower end is open and the head base is opened in the axial direction. A slider has a hollow part formed in the slider, and a part of the sliding part having a rod part and a hollow part having a suction port at the lower end is slidably inserted into the hollow part of the slider, and is pushed downward by a damper spring. 1. A chip component mounting head comprising a suction bit which is biased by the rod portion and has a sliding member provided at the upper end of the rod portion.