JPH038399A - Component attracting device - Google Patents

Abstract

PURPOSE:To make a device small and light weight and enable said device to be mounted at high speed by lifting a rod equipped with three types of nozzles which can make a sliding motion vertically together with a sliding block, enabling said rod to be rotated freely, and installing a vacuum switch over circuit in a specified position. CONSTITUTION:When an attempt is made to lower a slider 20, a sliding block 13 and a rod 1 moves downward by way of a cam follower 15. As a result, a mechanical valve of a switch over circuit installed to the side of the block 13 is actuated by the drive of the block 13 so that vacuum may be transmitted to a large nozzle 4, a middle nozzle 6 and a small nozzle 8 which can make a free sliding motion vertically, thereby attracting electronic components. When the slider 20 rises, a V groove of the rod 1 is connected with a rotary shaft 21 by way of a spring 2 so that the rod 1 may be rotated, which controls the component mounting direction. On the other hand, any desired nozzles, 4, 5, and 8 rise in proportion with the rising position of a fork 11. Any nozzle which is not in service, is stopped with a hook 9 at the position at which the fork rose, thereby reducing the size and weight of the device and enabling the components to be mounted at high speed by the optimum nozzle in the highest response with a short piping circuit as well.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a component suction device used in an electronic component mounting machine for mounting electronic components (leadless components) at predetermined positions on printed circuit boards and the like.

Background of the Invention In recent years, as leadless electronic components (chip components) have become widespread, they have come in a wide variety of shapes and sizes.In order to combine these electronic components to form an electronic circuit, it is necessary to use an electronic component mounting machine. There is a strong demand for high speed and high reliability.

An example of the above-mentioned conventional component suction device will be described below with reference to the drawings. 4 and 5 show a conventional electronic component suction device.

In FIG. 4, 1o1 is a rod that performs vertical and rotational movements. At its tip, there is a large nozzle 102 and a small nozzle 10.
Two nozzles No. 3 are provided coaxially. A lock 104 locks the large nozzle 102 in an upper position when it is not needed. A guide pin 106 regulates the rotation direction of the large nozzle 102 and the small nozzle 103 and guides their vertical sliding.

106 is a fork that switches from the large nozzle/L/102 to the small nozzle/L'103. Reference numeral 107 denotes a rotary table to which a nozzle unit 10 is attached and performs intermittent rotational operation. A gear 109 transmits rotational motion to the rod 101 (the rotational drive source is not shown).

Next, the vacuum path will be explained based on FIG. 1
10 is a mechanical pulp that switches the vacuum circuit. 11
Reference numeral 1 denotes a pusher that drives switching of the mechanical valve l rev 110. A piping tube 112 serves as a vacuum path from the mechanical pulp 11Q, and transmits the vacuum to the small nozzles 102 and 103 via the rod 101.

Next, the operation will be explained. First, in the suction nozzle switching process, for example, from the large nozzle 102 to the small nozzle /l/101
When switching to , the fork 106 rises and the large nozzle /L/
By lifting 102, lock 104 locks large nozzle relay 102 in the upper position. On the other hand, small nozzle/l/1
Lock 10 when switching from 01 to large nozzle/l/102
4 from the outside (not shown).

Next, the vacuum circuit is switched by operating the mechanical pulp 110 with the pusher 111, and the vacuum is applied to the piping tube 1.
Small nozzle /l/IQ3. through 12° rod 101. large nozzle) is transmitted to v1Q2. This attracts electronic components.

Problems to be Solved by the Invention However, with the above configuration, since there are only two types of nozzles, a large nozzle and a small nozzle, the suction state is unstable when dealing with a wide range of electronic components from micro parts to large parts. It is. In addition, the piping distance from the mechanical pulp that switches the vacuum circuit to the tip of the suction nozzle is long and the response is poor, making it unsuitable for high-speed electronic component mounting machines.

Therefore, the present invention arranges three types of suction nozzles (large, medium, and small) on the same axis to accommodate a wide range of electronic components, and also shortens the piping distance by installing mechanical pulp in the slide block, making the entire component suction device small and lightweight. The aim is to increase the speed of electronic component mounting machines.

Means for Solving the Problems The means of the present invention for solving the above-mentioned problems consists of a slide block that is movable up and down, a spring biased inside the slide block, and a spring that is biased by the spring so that it can rotate freely by υ. a rod, three types of nozzles whose rotational direction is regulated on the same axis of the rod and which can be slid up and down, a lock part that locks an unused nozzle among these three types at an upper position, and the slide block. A mechanical pulp for switching the vacuum circuit is provided on the side surface of the slide block, and the vacuum circuit is switched by the downward movement of the slide block.

Function The present invention has the above-described configuration, so that an optimal nozzle can be selected from large, medium, and small nozzles depending on the size of the electronic component.
In addition, since the piping route from the mechanical valve that switches the vacuum circuit to the tip of the nozzle is short, it has excellent high-speed response, and the entire component suction device can be made smaller and lighter, making it possible to increase the speed of the electronic component mounting machine.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

1 is a rod that is biased upward by spring A2;
A groove 3 is provided at the upper end to transmit rotation. Further, a large nozzle 4 is provided at the lower end, and the direction of rotation is regulated by a pin A5, and the nozzle 4 is guided so as to be vertically slidable. Reference numeral 6 denotes a medium nozzle, which is guided by the inner surface of the rod 1 and the inner surface of the large nozzle 4, and is guided so as to be vertically slidable, with its pitching direction being regulated by a pin B7. Similarly, 8 is a small nozzle. 9 is a hook which presses the side surface of the large nozzle/l/4 with a spring B1o. Reference numeral 11 denotes a fork, which is configured to move up and down in two steps, and is adapted to lift the large nozzle/L/4.

12 is a lever A that pushes up the hook 9 and releases the large nozzle l.
V4. Release the middle nozzle/I/6 to the bottom end.

Reference numeral 13 denotes a slide block, which is attached so that it can be moved up and down by guiding the linear guide section 14. A cam follower 15 is fixed to the slide block 13 and transmits motion from the outside.

A mechanical valve 16 is fixed to the side surface of the slide block 13. Reference numeral 17 denotes lever B, which is used to turn on the vacuum circuit, and lever 018, which is used to turn OFF the vacuum circuit. Reference numeral 19 denotes a fixed block, which is brought into contact with the lever B17 when the slide block 13 is lowered to switch the vacuum circuit.

A slider 20 moves the cam follower 15 up and down. 21 is a rotation shaft that drives the rotation of the rod 1.

22 is a block, which is fixed to the rod 1 and has a hook 9;
is swingably mounted, and serves as an upward stopper for the rod 1.

Next, the operation in this embodiment will be explained.

Regarding the suction operation of electronic components, when the slider 2Q descends, the slide block 13 and the rod 1 descend, and when a certain downward stroke is reached, the lever B17 of the mechanical valve 16 comes into contact with the fixed block 19, and the vacuum is released. It is transmitted to each nozzle /L'4, 6.8, and the electronic component is sucked. Subsequently, as the slider 2o rises, each nozzle 4.6.8 rises, and the suction operation is completed.

Next, referring to the rotation in the mounting direction, the slider 20 rises and the V-groove 3 of the rod 1 and the rotating shaft 21 engage, compressing the spring A2 by a slight amount, and the tension between the spring A2 and the slide block 13. A gap is created between the rods 1 and 2, and the rotation of the rotating shaft 21 is transmitted to the rod 1.

Next, talking about the nozzle switching operation, first of all, when switching from large nozzle 4 to medium nozzle/l'6, fork 1
1 rises by the first stroke 81, the hook 9 engages and locks the large nozzle/V4. As a result, the middle nozzle 6 and the small nozzle /L/8 are in the lower position. Furthermore, by raising the large nozzle 4 in the second stroke S2, the middle nozzle/L/6 is raised, and the hook 9 is moved to the large nozzle 4. It locks onto the middle nozzle 6. This causes the small nozzle 8 to be in the lower position.

Next, each nozzle/V4, 6. In order to return the lever AI2 to the lower position, the hook 9 swings and the large nozzle/v4. The middle nozzle/l/6 is released and returns to the lower position.

Effects of the Invention As described above, the present invention includes a slide block that can move up and down, and a rod that is biased by a spring inside the slide block and can be rotated by pressing the spring. is provided with a groove for transmitting rotation, and has three types of nozzles coaxially regulated in the rotational direction and capable of sliding up and down at the lower end, as well as a locking portion for locking unused nozzles at an upper position; A mechanical valve for switching the vacuum circuit is provided on the side surface of the slide block, and the lever of the mechanical valve comes into contact with the fixed block and the vacuum circuit is switched by the downward movement of the slide block. The most suitable nozzle can be selected from , medium, and small nozzles, greatly improving installation reliability, and the short piping path from the mechanical valve that switches the vacuum circuit to the nozzle tip provides excellent high-speed response.
Moreover, it is possible to reduce the size and weight of the entire component suction device and to increase the speed of the electronic component mounting machine.

[Brief explanation of the drawing]

Fig. 1 is a left sectional view of a parts suction device according to an embodiment of the present invention, Fig. 2 is a front view of Fig. 1, Fig. 3 is a right side view of Fig. 2, and Fig. 4 is a conventional part suction device. FIG. 6 is a cross-sectional view of the rotary table portion to which a conventional component suction device is attached. 1...Rod, 2...Spring A, 3...
...VAW, 4...Large nozzle, 6...
-Medium nozzle, 8...Small nozzle, 9...Hook, 13...Slide block, 16...
Mechanical valve, 19...Fixed block.

Claims (2)

[Claims] (1) A component suction device of an electronic component mounting machine that sequentially mounts chip-shaped electronic components onto predetermined positions on a printed circuit board includes a slide block that can move up and down, a spring biased inside the slide block, and a The rod is equipped with a rod that can be rotated freely by pressing the rod, the upper end of the rod is provided with a V groove for transmitting rotation, and the lower end is provided with a plurality of nozzles coaxially regulated in the direction of rotation and that can be slid up and down. At the same time, a lock part for locking the unused nozzle among the plurality of nozzles at an upper position, and a mechanical valve for switching the vacuum circuit are provided on the side of the slide block, and the lowering movement of the slide block causes the lever of the mechanical valve to A component suction device characterized in that the component suction device is configured such that the vacuum circuit is switched when the unit comes into contact with a fixed block. (2) The plurality of nozzles are comprised of three types of nozzles: large, medium, and small, and each nozzle has a V-shaped groove, so that each nozzle can be attached and detached by lifting and rotating it. A component suction device according to claim 1, characterized in that: