JPH04250346A - Inspecting device for soldering - Google Patents

Abstract

PURPOSE:To provide an inspecting device for soldering which is capable of inspecting the condition of soldering of the soldered portion of a component- mounting substrate having components mounted thereon and whose inspecting performance is not irregular. CONSTITUTION:An inspecting device for soldering includes a light-transmitting illumination plate 1 which allows light 9 emitted from a light source toward the soldered portion 8 of a component-mounting substrate 7 to pass therethrough and which is illuminated by the light, optical fibers 2, 3 which allow light 10 reflected at the soldered portion 8 of the component-mounting substrate 7 to be incident on the plate surface 11 of the light-transmitting illumination plate 1 and which guides the light 10 to below a plate surface 12, a light quantity detector 4 which detects the quantity of the light 10 guided by the optical fibers 2, 3 and reflected at the soldered portion, and displays 5, 6 which display conditions relating to the quantity of light detected by the light quantity detector 4.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a soldering inspection device for inspecting the soldering condition of components, and more specifically, for inspecting the soldering condition of the soldered portion of a component mounting board on which components are mounted. This invention relates to a soldering inspection device.

0002

2. Description of the Related Art Conventionally, when inspecting the soldered state of a soldered portion of a component mounting board on which components are mounted, an inspection method using the naked eye using a magnifying lens has generally been adopted.

0003

[Problems to be Solved by the Invention] However, this inspection method takes a lot of time to inspect one component-mounted board, and the inspection performance is dependent on the naked eye of the inspector, so the inspection performance is There was a problem with variations.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a soldering inspection device that can perform inspection in a short time and that does not cause variations in inspection performance.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention, as shown for example with reference to FIG. It relates to a soldering inspection device for inspecting the condition.

[0006] The present invention also provides the component mounting board (7).
) and a light transmitting irradiation plate (1) that transmits and irradiates the light (10) emitted by a light source to the soldered part (8) of the component mounting board (7), and the light reflected from the soldered part (8) of the component mounting board (7). reflected light(
10) is incident on the plate surface (11) of the light transmission and irradiation plate (1) and is guided to the optical fibers (2, 3) and guided to the optical fibers (2, 3) below the plate surface (12). a light amount detection means (4) for detecting the amount of the partially reflected soldering light (10); and a light amount state display means (5, 6) for displaying the light amount state detected by the light amount detection means (4). It is characterized by having the following.

[0007]

[Operation] According to the above configuration, the light (9) transmitted through the light transmission irradiation plate (1) is transmitted to the soldered portion (8) of the component mounting board (7).
When illuminated with light, the soldered part (8) reflects the light (9) depending on its soldering state. When the soldering condition is good, the reflected light (10) with a large amount of light is reflected, and when the soldering condition is poor, the reflected light (10) with a small amount of light is reflected. This reflected light (10) is guided to the light amount detection means (4) via optical fibers (2, 3). Here, the amount of light is detected, and the state of the light amount is displayed on the light amount state display means (5, 6).

Therefore, the inspector simply irradiates the soldered portion (8) of the component mounting board (7) with the light (9) and confirms the light amount status displayed on the light amount status display means (5, 6). The soldering condition of the soldered part (8) can be inspected. In this case, the light amount status display means (5, 6) displays the soldering partially reflected light (
10) When the amount of light is high, it is displayed that the light amount state is high, and when the light amount is low, it is displayed that the light amount state is low. If the light intensity is low, soldering is defective.

[0009] With this, the soldering state can be inspected in a short time, and the soldering state is inspected based on the amount of light (10) reflected from the light (9) irradiated on the soldered part (8). There is no variation in performance.

[0010] The above reference numerals in parentheses are used to refer to the drawings and are not intended to limit the structure in any way.

[0011]

[Embodiment] An embodiment of the present invention will be described below with reference to FIG.

[0012] This soldering inspection device includes a light transmission irradiation plate 1,
Optical fibers 2 and 3, light amount detector 4, and indicators 5 and 6
It is composed of:

The light transmitting and irradiating plate 1 is used to transmit and irradiate light 9 emitted from a light source (not shown) onto a soldered portion 8 of a component mounting board 7 on which components (not shown) are mounted. Here, the light transmitting and irradiating plate 1 is a transparent plastic plate.

The optical fibers 2 and 3 allow the reflected light 10 reflected from the soldered portion 8 of the component mounting board 7 to enter on the plate surface 11 of the light transmission and irradiation plate 1 and guide it below the plate surface 12. belongs to. The light incident side ends 13 and 14 of the optical fibers 2 and 3 are passed through the light transmission and irradiation plate 1 and protrude above the plate surface 11 of the component mounting board 7. Each light incident side end 13
, 14, the soldering portion 8 of the component mounting board 7 is positioned between them. A light amount detector 4 is connected to the light output side ends 15 and 16 of the optical fibers 2 and 3.

The light amount detector 4 is for detecting the amount of soldering partially reflected light 10 guided to the optical fibers 2 and 3. This light amount detector 4 drives indicators (hereindicating lights) 5 and 6 when the amount of soldering reflected light 10 guided to each optical fiber 2 and 3 is less than a certain amount.

When inspecting the soldering condition of the soldered portion 8 of the component mounting board 7 using this soldering inspection device, first,
As shown in the figure, the light input side end 13 of each optical fiber 2, 3,
The soldered portion 8 of the component mounting board 7 to be inspected is placed between the parts 14 and 14. In this case, the component mounting board 7 is placed on the light transmission and irradiation plate 1 using a support member (not shown). Then, the soldered portion 8 is irradiated with light 9 that has passed through the light transmission irradiation plate 1. In this way, the lights 10, 10 reflected on both sides of the soldered part 8 are guided to the light quantity detector 4 by the optical fibers 2, 3, and the light quantity detector 4 guides the lights 10, 10 to each optical fiber 2, 3 to the soldered part. The amount of reflected light 10, 10 from both sides of 8 is detected. As a result, when the amount of light is at the level of poor soldering (below a certain amount), the indicator 5
, 6 lights up. Therefore, by looking at the display status of each display 5, 6, the soldering status of the soldered portion 8 can be inspected (determined). In this case, at least one of the indicators 5,
When 6 lights up, it means that the soldered portion 8 is defective in soldering.

Although a transparent plastic plate is used as the light transmitting and irradiating plate 1 in this embodiment, a transparent glass plate may also be used.

Furthermore, although indicator lights are used as the indicators 5 and 6 in this embodiment, they may also be a buzzer or an indicator that numerically indicates the amount of light.

[0019]

As explained above, the soldering inspection device of the present invention irradiates light onto the soldered portion of a component mounting board, detects the amount of light reflected from the soldered portion, and determines the state of the light amount. Since it is displayed, the soldering state can be inspected in a short time, and there is no variation in inspection performance.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a soldering inspection device according to an embodiment of the present invention.

[Explanation of symbols]

1 Light transmission irradiation plate 2, 3 Optical fiber 4 Light amount detector 5, 6 Display device (light amount status display means) 7 Component mounting board 8 Soldering part 10 Light emitted by the light source 11, 12 Board surface

Claims (1)

[Claims] 1. A soldering inspection device for inspecting the soldering state of a soldered portion of a component mounting board on which components are mounted, wherein light emitted by a light source is transmitted and irradiated onto the soldered portion of the component mounting board. a light transmitting and irradiating plate for transmitting light, an optical fiber that allows the reflected light reflected from the soldered portion of the component mounting board to enter on the plate surface of the light transmitting and irradiating plate and guide it below the plate surface; 1. A soldering inspection device comprising: a light amount detection means for detecting the amount of reflected light from a partially reflected solder joint; and a light amount state display means for displaying a light amount state detected by the light amount detection means.