JPH0430516Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an assembly inspection device for a transmission gear assembly used in a gear type transmission.

(Prior Art) In order to check whether a predetermined gear is assembled at a predetermined position on a shaft, conventionally, a transmission gear assembly shaft is meshed with a regular transmission gear assembly shaft that meshes with the transmission gear assembly shaft. Check the meshing condition visually while turning it by hand, or as in Japanese Patent Application No. 48178/1980,
It is common practice to electrically sense the outer diameter and spacing of gears with gear outer diameter inspection heads and gear spacing inspection heads placed on the left and right sides of the shaft to detect pass/fail. In addition, a projection type contour inspection device is used to shine a light beam onto a limited area of the inspected object, electrically convert the contour of the projected image into numerical values, and compare it with the master numerical value to detect differences in shape. The means are also known.

(Problems to be solved by the invention) In the above-mentioned visual inspection, as the number of gears increases, the time required to inspect one assembled shaft increases, and in the above-mentioned inspection by electric sensing, it is mechanically complicated and expensive. In addition, with the projection type device described above, when inspecting a long workpiece such as a transmission gear assembly shaft, the light intensity tends to be insufficient at both ends of the workpiece compared to the middle part, so it is necessary to use a light source and a detection sensor. They had to be moved at the same time, making the structure complicated.

(Means for solving the problem) The present invention avoids the inefficiency of visual inspection and the conceptual complexity of electrical sensing, and adopts a projection method, and also provides sufficient light intensity to the entire transmission gear assembly shaft. The aim is to obtain a clear projected image by irradiating light, and a transmission gear assembly shaft with multiple gears assembled on the shaft is placed between the light source device and the detection device, and a transmission gear assembly shaft is installed along the axis of the transmission gear assembly shaft. A moving detection device detects the contour of the transmission gear assembly shaft to detect abnormalities in assembly, and the light source device is fixed to an opening in the front of the casing through a frosted glass and a fluorescent light provided inside the casing. In the projection-type gear assembly inspection light source device constructed by It is characterized by having a large number of straight tube-shaped fluorescent lamps placed behind it parallel to the frosted glass.

(Embodiment) The drawing shows an embodiment of the present invention, in which a machine base 1 is provided with an indexing table 3 rotated by an indexing table driving device 2, and this indexing table 3 has eight workpiece holders 4. It supports eight workpieces W, that is, the speed change gear assembly shafts. Gears G ₁ , G ₂ . . . are assembled to each workpiece W. Each work holder 4 can support a transmission gear assembly shaft having the same structure, or can support every other main gear assembly MG and counter gear assembly CG of a set of transmissions.
The indexing table 3 is rotated by 90 degrees, and the position A in Fig. 1 is the workpiece mounting part, B is the inspection part, C is the marking part, and D is the position A.
2 is a removal section, where two workpiece holders 4 are combined as a set to receive indexing and to transport the workpiece W for inspection, marking, etc.

In the inspection section B, two clamp columns 5, 5 are installed upright on the machine stand 1, and the clamp columns have
An upper clamp cylinder 6 and a lower cylinder 7 are provided on the upper and lower coaxial lines with a pair of workpiece pedestals 4a and 4b in between, and gear lifting devices 8 and 8 are provided between each clamp column 5 and 5, and a gear lifting device 8 is provided inside the gear. It is now easier to detect whether a certain washer, circlip, etc. is attached.

There is a column 9 erected on the machine base 1 on the front outside of the columns 5, 5, and two image sensors 12, 12 are simultaneously moved up and down by a screw shaft 10 supported by the column 9 and a motor 11. It is movably provided facing the workpiece W, and is configured to simultaneously inspect two, for example, the counter gear assembly CG and the main gear assembly MG, which are placed on the workpiece pedestals 4a and 4b.

The stamping section C is provided with two stamping machines 13, 13, which stamp a properly assembled workpiece W and automatically carry it out from the removal section D toward the next process.

The light source device 14 includes a casing 16 fixed to the machine base 1 with a bracket 15, two pieces of ground glass 18 and 19 fixed to an opening 17 on the front side of the casing 16, and two pieces of ground glass 18 and 19 arranged parallel to each other behind the ground glass. It consists of a large number of fluorescent lights 20, 20..., and a frosted glass 1
The diffused reflection surfaces 18a and 19a of glasses 8 and 19 are both directed rearward, and there are windows 10 to 19 between both glasses 18 and 19.
A gap 21 of about 40 mm is provided, and the frosted glass 19
A similar gap 22 is also provided between the fluorescent lamp 20 and the fluorescent lamp 20. These frosted glasses and fluorescent lamps are commercially available.

As a result of the trial, frosted glass 18, 19, fluorescent lamp 2
0 in such a positional relationship, the diffusely reflected light is averaged out compared to when only one piece of ground glass is used or when multiple pieces of ground glass are placed close together, and the amount of light is uniform over the entire surface of the glass, and the entire workpiece is It was found that the image becomes clearer. As a result, we were able to improve inspection accuracy.

(Effects of the idea) By fixing two pieces of frosted glass and a fluorescent light at a distance, the diffusely reflected light is averaged out, and the amount of light is even over the entire surface of the glass, making the image of the entire workpiece clear and improving inspection accuracy. will improve. Moreover, since the present light source device is of a fixed type, the structure is simple and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a projection type gear assembly inspection device embodying the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a longitudinal sectional side view of the light source device of the present invention. W...Work, 12...Image sensor, 14
... Light source device, 18, 19 ... Frosted glass, 20
...Fluorescent light.

Claims (1)

[Scope of utility model registration request] A transmission gear assembly shaft on which multiple gears are assembled is placed between a light source device and a detection device, and the outline of the transmission gear assembly shaft is detected by the detection device that moves along the axial direction of the transmission gear assembly shaft. A projection-type gear assembly inspection light source device configured to detect abnormalities in assembly, the light source device being configured by a frosted glass fixed to an opening in the front of the housing and a fluorescent light provided inside the housing. In this method, two pieces of frosted glass are fixed to the opening on the front of the housing with their diffused reflection surfaces facing rearward and spaced apart from each other in the front and back, and a number of straight tube-shaped fluorescent lamps are further spaced apart from the frosted glass and placed behind them. A projection type gear assembly inspection light source device characterized by being arranged in parallel.