JPH0924432A - Composite part and production therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate no deformation and to machine in a short time by fixing with pressing another member onto a member having a hole in a sheet being less than a specific thickness. SOLUTION: A hole except a circular shape is formed on a plate like member 1 being less than 1.5mm thickness. After another member 2 is fixed with pressing on the hole, the plate like member 1 is machined in a prescribed shape, and it is made as a camera shutter part. The camera shutter part that the weight is lightened and the strength of requiring part is kept surely is obtained. Because an attaching hole of a reinforcing member 2 is made in an ellipse shape or a square shape except the circular shape, after fixing, the rotating displacement of the plate like member 1 and the reinforcing member 2 is not generated. After the reinforcing member 2 is fixed on the plate like member 1, because the shaft hole can be punched together with the relative other part, the positional precision of the relative holes can be obtained easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a part of a thin member having a hole in which the hole portion is reinforced and a method for manufacturing the same.

[0002]

2. Description of the Related Art Recently, a high speed shutter is required for a camera, and a shutter having a maximum shutter speed of 1/8000 seconds has been developed. Focal plane shutters used for single-lens reflex cameras include a horizontal curtain shutter and a vertical blade shutter, but a vertical blade shutter is mechanically easier to handle for higher speeds. As shown in FIG. 6, the vertically traveling blade type shutter includes a front blade group 11 and a rear blade group 1.
It is divided into two blade groups of 3, and these two blade groups 1
The slits 1 and 13 form the shutter substrate 1
The photosensitive surface is exposed by sequentially moving the zero opening 10a. The front blade group 11 and the rear blade group 13 each have two arms 12a, 12b, 14a, 14b.
Attached to form parallel links. These four arms 12a, 12b, 14a, 14b are pivotally supported on the shutter substrate 10 so as to be swingable, and are moved by drive shafts 15, 16 to move the arms 12a, 12b, 1b.
The blade groups 11 and 13 are folded or unfolded according to the swing of the blades 4a and 14b.

As a method for increasing the speed of the shutter, there are a method for strengthening the driving force and a method for reducing the weight of moving members such as blades and arms. The method of enhancing the driving force is limited because the life of the battery, which is the driving source, is shortened. Therefore, generally, a method of reducing the weight of the moving member is adopted. In order to reduce the weight of the moving member, the thickness of the moving member is reduced, and aluminum alloy or titanium alloy is used as the material. Problems in such a method for reducing the weight are in terms of rigidity, strength and flatness. When an aluminum alloy or a titanium alloy is used as the material, the rigidity and strength are inferior to the conventionally used hardened carbon steel. Further, if the member is made thin, planarity becomes a problem. Methods for solving these problems are disclosed in JP-A-60-252331 and JP-A-63-17.
No. 0629 and Japanese Patent Laid-Open No. 5-134292.

However, these methods focus only on the blade, not on the arm.
It is also necessary to reduce the weight of the arm, which is a moving member similar to the blade. Weight reduction of the arm is even more difficult than that of the blade. This is because if the thickness of the arm is reduced for the purpose of weight reduction, the arm cannot withstand the impact when the shutter is stopped, and the part through which the drive shaft passes (hereinafter referred to as the drive part) and the connecting part with the blade are damaged. . As a solution to this problem, four arms 12a, 12b, 14a, 14b are used.
Of the two, 12
It is disclosed that b and 14b are thinned, and the strength of the connecting portion is ensured by etching the portions other than the connecting portion, which requires a thickness for strength, by etching (Japanese Patent Laid-Open No. 5-24.
9542).

In addition to the above, as a method for reducing the weight of a member and ensuring the strength of a necessary portion, there is a method of thinning the member for weight reduction and reinforcing the portion requiring the strength with another member. is there. In the case of the arms 12a and 14a,
The arm drive part is reinforced with a metal collar (hereinafter referred to as a base). Generally, as a method of fixing the reinforcing member, there are adhesion and caulking.

[0006]

However, the method of thinning the portion other than the necessary portion by etching has a problem that it takes time to manufacture. Further, in the method using adhesion, there is a problem that it takes time to cure the adhesive and it is necessary to manage the adhesive.

In the method by caulking, the compressive force acts on the entire shaft of the reinforcing member, the center of the shaft swells, and the thin member deforms and cannot be used. Only the reinforcing member corresponding to the circular hole of the member There is a problem that the reinforcing member can be fixed and that the reinforcing member rotates, and a stronger caulking strength is required to prevent the reinforcing member from rotating, which further deforms the shape.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a component which is light in weight and secures the strength of a necessary portion, particularly a shutter component for a camera. .

[0009]

The first aspect of the present invention is to provide a composite part having a thickness of 0.5 mm or less, in which another member is fixed to the hole having a hole by pressing. )"I will provide a. The present invention secondly provides a "composite article (claim 2) according to claim 1, characterized in that the holes have a shape other than a circular shape."

Thirdly, the present invention provides "a composite part (claim 3) according to claim 1, characterized in that the part is a shutter part for a camera. Fourthly, the present invention relates to a "composite component characterized in that a hole is formed in a part of a plate member, another member is fixed to the hole by press working, and then the plate member is processed into a predetermined shape. The fifth aspect of the present invention is "the method for producing a composite part according to claim 4 (claim 5), wherein the holes are other than circular".
I will provide a.

[0011]

In the component according to the present invention, the reinforcing member is fitted into the hole of the member having the hole, and the portion protruding from the member having the hole is bent and fixed to the outside by press working. Therefore, it will be deformed by caulking fixation 0.5m
Even a member of m or less does not deform.

Further, in the component according to the present invention, since the members and the reinforcing members are processed and fixed by press working,
It does not take much time, unlike the etching process of etching a part of the member for weight reduction or the method of fixing the member and the reinforcing member with an adhesive. Furthermore, the manufacturing method of the component according to the present invention, after fixing the reinforcing member to the hole of the member having the hole,
Since the step of forming the required axial hole in the reinforced portion and the step of forming the predetermined shape are simultaneously performed by punching, high dimensional accuracy can be obtained.

Even if the member and the reinforcing member are made of the same material,
Different materials may be used. Examples of the material include titanium, titanium alloy, aluminum alloy, stainless steel, carbon fiber reinforced plastic, beryllium copper alloy, and tool rope. Since the manufacturing method according to the present invention uses press working, the shape of the hole of the member and the shape of the reinforcing member are not limited to the circular shape, but may be a quadrangular shape or an elliptical shape.

[0014]

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments. [First Embodiment] FIG. 1 is a plan view of an arm of a camera shutter component according to a first embodiment of the present invention. The arm 1 is a thin plate of titanium and has a thickness of 0.15 mm, and the material of the base 2 which is a reinforcing member is titanium. The arm 1 is manufactured by pressing from a plate having a thickness of 0.8 mm.

FIG. 2 is a sectional view of the first embodiment described above.
It shows a state in which the vicinity of the driving portion of the arm 1 is reinforced by a base 2 which is a reinforcing member. The difference between the size of the hole of the arm 1 and the size of the shaft of the mouthpiece 2 is 15 μm, and only the fitting is done, and the fitting part of the shaft is not plastically deformed and fixed like caulking. The flange of the base 2,
Bend the protruding portion of arm 1 of base 2 to arm 1
It is sandwiched and fixed.

In this embodiment, the arm 1 reinforced by the base 2 is used.
Is manufactured with a single press die. The manufacturing process will be described with reference to FIG. Below the layout 4 for making the arm 1 and below the layout 5 for making the base 2, there is a progressive die. Below the two layouts 4 and 5, there is a rotary stage 3 having four stages. The rotary stage 3 is a type in which the outer shape of the mouthpiece 2 is pulled out, is used for transferring the mouthpiece 2, and is also a tool for fixing the mouthpiece 2 in the vicinity of the drive unit of the arm 1. When the press machine moves up and down by one stroke, the rotary stage 3 is rotated by 90 degrees so that the layout 4 and the layout 5 move forward by one station.

FIG. 4 is an enlarged view showing details of the rotary stage section. FIG. 5 shows an AA cross section of FIG. In FIG. 4, the rotary stage 3 is formed by forming the die 2 by the progressive die of the layout 5 (forming a hole, forging, etc.).
3a is processed, and is withdrawn into the rotary stage 3 at the position of 3a and held by the receiving piece 6 of FIG.

Next, the pressing machine operates for one stroke, the rotary stage 3 rotates 90 degrees, and the die 2 withdrawn at the position 3a moves to the position 3b. The position 3b is a standby station where the base 2 does not contact either the layout 4 or the layout 5. At the position 3e, the extra thickness 5a of the layout 5 from which the die 2 has been removed is removed through the hole 9a in the rotary shaft 9 of the rotary stage 3.

Further, the pressing machine operates for one stroke, the rotary stage 3 rotates 90 degrees, and the die 2 moves to the position 3c. The receiving piece 6 is pushed up by the seesaw lever 7 of FIG. 5, the base 2 passes through the layout 5, and is fitted into the hole of the arm 1. The molding punch 8 bends the portion of the base 2 protruding from the arm 1 to sandwich and fix the arm 1. The upper die having the molding punch 8 is received by a stopper (not shown) provided on the lower die so that an unnecessary force is not applied to the mouthpiece 2 and the arm 1.
In order to facilitate handling in a post-process such as surface treatment, the arm reinforced by the die 2 is not separated from the layout 4, and the plate-shaped member in which 10 arms are connected is finished to complete the press working.

Further, it is a type in which the outer shape of the base 2 is pulled out,
It is a worker to transfer the base 2, and is also a tool for fixing the base 2 to the vicinity of the drive unit of the arm 1. It is also possible to use a slide system in which when the press machine moves up and down by one stroke, the layout 4 and the layout 5 move in one step when moved forward by one station. In the present embodiment, there are two series of progressive type in which the layout 5 for making the base 2 intersects the layout 4 for making the arm 1, and the rotary stage 3 having four stages is incorporated below the crossing type. The present invention is not limited to this,
For example, a layout in which a layout 4 for making an arm 1 and a layout 5 for making a base 2 are arranged and a rotary stage 3 having four stages is incorporated in a two-series progressive type, or a base 4 under a layout 4 for making an arm 1 is provided. Layout 5 making 2
It is also possible to adopt a configuration in which a slide type configuration having four stages is combined with a two-sequential progressive type that intersects with each other. [Embodiment 2] FIG. 7 is a process drawing of a camera shutter component according to Embodiment 2 of the present invention.

The shutter component is an arm as in the first embodiment, but the material is different. The arm 1 has a thickness of 0. O7m
m carbon fiber reinforced plastic (hereinafter referred to as CFRP)
The base 2 is made of a stainless steel plate having a thickness of 0.05 mm. First, press processing to make CFRP
The square hole 20a is opened in the plate 20 and the square hole 2a is formed by pressing.
0a is reinforced with a stainless steel base 2.

Further, a CFRP plate 2 is formed by pressing.
The necessary holes are opened at 0, and the outer shape of the arm is punched out by pressing to finish the processing.

[0023]

As described above, the parts according to the present invention are
Since the reinforcing member can be fixed by pressing to the portion of the thin member having a thickness of 0.5 mm or less that needs to be reinforced, the thin member is not deformed. Further, since it is a method by press working, it can be worked in a short time, and it does not take time and labor for an operator by continuously performing a series of steps.

Further, in the caulking method, only a reinforcing member having a circular shaft can be fixed, and a high fixing strength is required to prevent the shaft from rotating, which causes deformation. In this method, the shaft can be fixed even with a reinforcing member having an elliptical or square shape, and the shaft does not rotate after the fixing. There is no need to increase the fixing strength to prevent shaft rotation.

After fixing the reinforcing member to the plate-like member as in the second embodiment, it is possible to perform punching work together with the shaft hole and other related parts, so that the positional accuracy of the related hole can be easily obtained. is there.

[Brief description of drawings]

FIG. 1 is a plan view of an arm that is Embodiment 1 of the present invention.

FIG. 2 is a sectional view of an arm that is Embodiment 1 of the present invention.

FIG. 3 is a schematic configuration diagram of an arm manufacturing apparatus that is Embodiment 1 of the present invention.

FIG. 4 is a detailed view of a rotary stage portion which is a part of the arm manufacturing apparatus.

5 is a sectional view taken along line AA of FIG.

FIG. 6 is a plan view of a conventional camera shutter using an arm.

FIG. 7 is a plan view showing a manufacturing process of an arm according to a second embodiment of the present invention, and FIG. 7A shows a state where a square hole 20a is opened in a CFRP plate 20 by press working,
FIG. 7 (b) shows that the square hole 20a is reinforced by the stainless steel die 2 by press working, and in FIG. 7 (c),
FIG. 7D shows a state where necessary holes are opened in the CFRP plate 20 by press working, and FIG. 7D shows a state where the outer shape of the arm is removed by press working and the processing is completed.

[Explanation of symbols]

 1 ... Arm 2 ... Clasp 3 ... Rotating stage 4, 5 ... Layout 6 ... Receiving piece 7 ... Seesaw lever 8 ... Molding punch 9 ... Rotating shaft 10 ... Shutter substrate 11 ... Front blade group 12a, 12b ... Front blade arm 13 ... Rear blade group 14a, 14b ... Rear blade arm 15, 16 ... Drive shaft 20 ... CFRP Board

Claims (5)

[Claims] 1. A composite component having a thickness of 0.5 mm or less and having another member fixed to the hole by pressing. 2. The composite component according to claim 1, wherein the hole has a shape other than a circular shape. 3. The composite component according to claim 1, wherein the component is a camera shutter component. 4. A composite part manufacturing method comprising forming a hole in a part of a plate member, fixing another member to the hole by press working, and then working the plate member into a predetermined shape. Method. 5. The method of manufacturing a composite part according to claim 4, wherein the hole is not circular.