JPS6236813B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a workpiece that automatically assembles to-be-assembled parts (character wheels) into a frame (workpiece) using a totalizer, such as a register. The present invention relates to a workpiece positioning device in an automatic assembly device.

(Prior Art) In general, as a means for assembling parts to be assembled using this type of totalizer, for example, as shown in FIG.
Conventionally, when assembling a plurality of character wheels B having gear B ₁ and mounting them on a support shaft C, conventionally, a plurality of character wheels B having gear B ₁ are manually attached to a jig in advance. Therefore, they are assembled by inserting them into the frame W and mounting them around the support shaft C.

(Problems to be Solved by the Invention) However, the above-mentioned manual assembly means not only requires manpower, but also is troublesome to assemble, making it difficult to achieve labor savings through mass production, and also having the above-mentioned problems. When assembling the letter wheel, there is a risk of it falling on its side and damaging the letter wheel.

In view of the above-mentioned points, the present invention allows workpieces to be assembled reliably and quickly without requiring any manpower.
The present invention provides a workpiece positioning device in an automatic workpiece assembly device, which is capable of positioning and assembling workpieces, and is intended to save labor through mass production.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a frame having locking holes formed opposite to each other on opposing side surfaces, and a shaft mounted on the same axis between the opposing side surfaces of the frame. A workpiece positioning device that positions and holds a plurality of character wheels, including a holding frame provided on a guide rail, and a support formed on the upper part of the holding frame to hold the character wheels on the same axis. a pair of guide holes drilled in the holding frame parallel to the character wheel; a pair of guide shafts fitted in each of the guide holes so as to be movable in the axial direction; and each of the guide shafts. a pair of movable side plates fixed to opposite ends of each of the movable side plates, and attached oppositely to each of the movable side plates and engaged with a locking hole in the frame to position the frame and the character wheel. a splitting member having a pair of locking pins, a compression spring stretched between the movable side plates, and a pair of pusher pins for sliding each of the guide shafts in a direction in which the movable side plates are separated; a pair of cam members that are provided on the member and press and hold both ends of the character wheel when the guide shaft is slid by the pusher pin; a chuck body that is provided above the holding frame so as to be movable up and down; a pair of chuck members which are provided and which clamp the frame and descend following the chuck body to position the frame on both sides of the character wheel and release the clamping state of the cam member that is gripping the character wheel; The frame is positioned and inserted on both sides of the character wheel.

(Embodiment) Hereinafter, an illustrated embodiment in which the present invention is applied to an automatic assembly line for registers will be described.

In FIGS. 1 to 12, reference numeral 1 denotes an elongated guide rail with a gutter-like cross section, and on this guide rail 1, as shown in FIGS. 2 and 4, there is a flat bottom plate. A holding frame 2 formed with 2a is slidably provided so as to be transportable, and a support portion 2b for holding the plurality of letter wheels B side by side is formed on the upper part of this holding frame 2. ing. Further, on both side surfaces of the holding frame 2 at a position close to the support portion 2b, a pair of guide holes 3 are provided perpendicularly to the longitudinal direction of the holding frame 2, as shown in FIG. Each guide shaft 4 is inserted into both guide holes 3 so as to penetrate from opposite sides of both side surfaces of the holding frame 2. Furthermore, at each end of both guide shafts 4,
Each movable side plate 6 having each positioning pin 5 is substantially integrally attached by each tightening nut 7, and each said positioning pin 5 is engaged with a frame W forming a part of said part to be assembled. It is attached horizontally to the inside of each movable side plate 6 so as to be able to engage with the stop hole _W1 (see FIG. 1). Furthermore, a tension spring 8 such as a coil spring is provided between the movable side plates 6 and 6, and the tension spring 8 is provided between the movable side plates 6 and 6.
Due to its elasticity, it comes into pressure contact with both side surfaces of the holding frame 2.

On the other hand, as shown in FIG. 2, in the vicinity of the holding frame 2 located at each end of the guide shafts 4, a pair of spread leg members 9 are rotated by respective support shafts 10. A pair of pusher pins 11 are mounted on the upper part of both spread leg members 9 to push each end of each of the guide shafts 4 against the elasticity of the compression spring 8. As shown in FIG. 6, both movable side plates 6 are provided so as to be pulled out together. Further, a pair of operating arm rods 12 are pivotally attached to the upper portions of both the leg spread members 9 by respective pin shafts 13, and the operating arm rods 12 are moved upwardly by the elasticity of a spring 14. Although it is biased so that it can float, it is restricted by stoppers 15 provided on the upper portions of both operating arm rods 12. Furthermore, a pair of pigeon-chest-shaped cam members 16 are pivotally attached to the middle of both actuating arm rods 12 by a pin 17, and the two cam members 16 are moved inside each other by the elasticity of a spring 18. Although the cam members 16 are biased so as to be able to rotate sideways, each stopper 19 attached to a part of both the cam members 16 abuts the lower end edges of the two actuating arm rods 12. It is provided so that the position of the cam member 16 can be regulated.

On the other hand, the lower end portions of both the split leg members 9 form respective fork portions 9a, and a connecting pin 21 attached to the connecting rod 20 is fitted into both of the fork portions 9a. Further, one end of a bell crank 23 is pivotally attached to the lower end of the connecting rod 20, and the bell crank 23 is attached to a portion of the guide rail 1 with a pin 24.
This bell crank 23
The roller 25 provided at the end of the other arm is the cam disk 2
6.

Therefore, when the cam disk 26 rotates, the bell crank 23, which is integral with the roller 25 and is in pressure contact with the cam disk 26, rotates around the support shaft 24. Thus, the two spread leg members 9 are connected to the bell crank 23 via the connecting pin 21 of the connecting rod 20.
rotates around each support shaft 10, so both pusher pins 1 provided on the upper part of both spread leg members 9
1 is adapted to push each of the guide shafts 4 against the elasticity of a compression spring 8 to pull out both movable side plates 6 to the outside.

That is, when the bell crank 23 rotates around the support shaft 24, the connecting rod 20 connected to the bell crank 23 reciprocates upward and downward, so that the connecting pin 21 of the connecting rod 20 rotates between the two legs. Both fork portions 9a of the member 9 are reciprocated upward and downward. Therefore, both the leg members 9 rotate around the respective support shafts 10.

On the other hand, a chuck body 27 is provided directly above the holding frame 2 so as to be movable up and down, and a cylinder device 28 is vertically disposed on an upper portion 27a of the chuck body 27. Further, a roller 29 is provided on the output shaft 28a of this cylinder device 28, and this roller 29 can push both cam portions 30b, which will be described later. Further, base portions 30a of a pair of chuck members 30 having respective cam portions 30b are rotatably attached to the upper portion 27a of the chuck body 27 near the cylinder device 28 by respective support shafts 31. Both chuck members 30 are urged by the elasticity of a compression spring 32 stretched between the chuck members 30 so as to be able to rotate inwardly relative to each other. Furthermore, the lower part 3 of both chuck members 30 is
A pair of locking pins 33 are provided at 0c so as to face each other inwardly, and both locking pins 33 include
It is designed to fit into an engagement hole _W2 of a frame W as a part to be assembled as shown in FIG. Further, pressure rollers 34 are attached to the lower ends of both chuck members 30, and each pressure roller 34 presses the upper surface of each operating arm rod 12 against the elasticity of each spring 14. I'm starting to get it. Furthermore, a stopper part (see FIG. 3) 27b is formed at the lower part of the chuck body 27, and when the chuck body 27 is lowered, the stopper part 27b is connected to the protrusion 2c of the holding frame 2. The lowering position can be regulated by colliding with the lower limit.

Therefore, as shown in FIG. 4, the support portion 2b of the holding frame 2 provided on the guide rail 1
A plurality of character wheels B are placed in advance in a row. On the other hand, as shown in FIGS. 2 and 3, the frame W as an assembled component is held by both locking pins 33 of both chuck members 30 by the chuck body 27.

When the holding frame 2 is moved to a predetermined position on the guide rail 1 and stopped, the cam disk 26 rotates. Then, the bell crank 23, which is integral with the roller 25 that is in pressure contact with the cam disk 26, slowly rotates back and forth around the support shaft 24, so that the connecting rod 2 connected to the bell crank 23
0, both the spread leg members 9 reciprocate around the respective support shafts 10, so that the pusher pins 11 provided on the upper parts of the both spread leg members 9 are as shown in FIGS. 5 and 6. As shown, when both the guide shafts 4 are pushed against the elasticity of the compression spring 8 and both the movable side plates 6 are pulled out, the two operating arm rods 12 are simultaneously pulled out.
Both cam members 16, which are pivotally connected to the cam members 16, clamp both side surfaces of the character wheel B so that they are separated from each other without any gaps (see FIGS. 7 and 8).

Meanwhile, in synchronization with the operation of the cam disc 26, the chuck body 27 descends while holding the frame W. Then, both the pressure rollers 34 of both chuck members 30 by this chuck body 27 are pressed against both operating arm rods 1 as shown in FIGS. 2 and 9.
2 is pressed down against the elasticity of the spring 14, both actuating arm rods 12 rotate downward around each pin shaft 13, and both cam members attached to both actuating arm rods 12 rotate downward. 16 tightens and compresses both sides of the character wheel B (see FIG. 9). Furthermore, when the chuck body 27 descends, both side plates of the frame W held by the chuck member 30 are inserted so as to sandwich both outer surfaces of the plurality of character wheels B.

That is, when the chuck body 27 is lowered, each pressure roller 34 of both chuck members 30 of this chuck body 27 presses down each operating arm lever 12 around each support shaft 13 against the elasticity of each spring 14. Then, each cam member 16 of each actuating arm lever 12 presses both sides of the character wheel B, tightening and compressing it, and then the chuck main body 27 further descends and presses against both chuck members 30. The held frame W is inserted into both outer surfaces of the character wheel B (see FIGS. 8, 9, and 10).

As shown in FIG. 3, the stopper portion 20b of the chuck body 27 abuts against the protrusion 2c of the holding frame 2, thereby stopping the downward movement of the chuck body 27 (10th (see figure). At the same time, the cylinder device 28 vertically disposed above the chuck member 27 operates, and the roller 29 of the output shaft 28a of the cylinder device 28 pushes the cam portions 30b of both chuck members 30 against the elasticity of the compression spring 32. As a result, both chuck members 30 are opened and separated from the frame W as shown in FIGS. 11 and 12, and then the chuck body 27 is raised.

On the other hand, both the split leg members 9 also have the cam disc 26
Since the legs are opened by the rotation of , the pusher pins 11 of both the leg opening members 9 are also separated from the guide shafts 4. Since the movable side plates 6 integral with both guide shafts 4 move back due to the stored elasticity of the compression spring 8, both positioning pins 5 provided on both movable side plates 6 are engaged with the frame W. It is engaged with the stop hole _W1 and is temporarily fixed.

After a plurality of character wheels B are inserted into the frame W in this way, the support shaft C can be mounted on both of them in the next step.

Incidentally, the guide rail 1 in the above-mentioned embodiment
Although the explanation has been made regarding the case where a long and narrow guide groove is formed, within the scope of not changing the gist of the present invention,
For example, you are free to change the design to a turntable.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a frame having locking holes drilled oppositely on each of the opposing side surfaces, and a plurality of letters mounted on the same axis between the opposing side surfaces of the frame. A workpiece positioning device for positioning and holding a wheel, a holding frame provided on a guide rail, a support portion formed on an upper part of the holding frame so as to hold the character wheel on the same axis, and the a pair of guide holes drilled in the holding frame parallel to the character wheel; a pair of guide shafts fitted in each of the guide holes so as to be movable in the axial direction; a pair of movable side plates fixed to the ends; and a pair of locks attached to each of the movable side plates facing each other and engaged with the locking holes of the frame for positioning the frame and the character wheel. a spread leg member having a pin, a compression spring stretched between the movable side plates, and a pair of pusher pins that slide each of the guide shafts in a direction in which the movable side plates are separated; A pair of cam members that press and hold both ends of the character wheel when the guide shaft is slid by a pusher pin, a chuck body that is provided above the holding frame so as to be movable up and down, and a chuck body that is provided on the chuck body and that supports the frame. and a pair of chuck members that are clamped and lowered by the chuck body to position the frame on both sides of the character wheel and release the clamping state of the cam member that is clamping the character wheel. As a result, not only can workpieces be assembled reliably and quickly without the need for manpower, but also labor can be saved through mass production.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of parts to be assembled used in the assembly of the present invention, FIG. 2 is a front view of the workpiece positioning device of the present invention, and FIG. 3 is a side view showing only the essential parts of the present invention. , FIG. 4 is a perspective view of the holding frame incorporated in the present invention, FIG. 5 is a cross-sectional view taken along the chain line AA in FIG. 4, and FIG. 6 shows the operating state of FIG. 5. 7 to 12 are diagrams for explaining the operation of the present invention. DESCRIPTION OF SYMBOLS 1... Guide rail, 2... Holding frame body, 5... Positioning pin, 6... Movable side plate, 8... Tightening spring, 9... Leg spread member, 12... Operating arm lever, 16... Cam member, 20...
Connecting rod, 23...Bell crank, 26...Cam disc, 2
8...Cylinder device, 30...Chuck member.

Claims (1)

[Claims] 1. A workpiece positioning device that positions and holds a frame having locking holes bored on each of the opposite side surfaces and a plurality of character wheels mounted on the same axis between the opposite side surfaces of the frame. , a holding frame provided on the guide rail;
A support portion formed on the upper part of the holding frame to hold the character wheel on the same axis, a pair of guide holes drilled in the holding frame parallel to the character wheel, and the guide hole. a pair of guide shafts fitted so as to be movable in the axial direction, a pair of movable side plates fixed to opposing ends of each of the guide shafts, and a pair of movable side plates attached opposite to each of the movable side plates. and a positioning pin that engages from the outside of the frame with a locking hole of the frame with the plurality of character wheels sandwiched between opposing sides of the frame to maintain the positional relationship between the frame and the character wheels; a compression spring stretched between the movable side plates; a spread member having a pair of pusher pins for sliding each of the guide shafts in a direction in which the movable side plates are separated; A pair of cam members that press and hold both ends of the character wheel when sliding the guide shaft, a chuck body that is provided above the holding frame so as to be movable up and down, and a chuck body that is provided on the chuck body that holds the frame between them. and a pair of chuck members that are moved downward by the chuck body to position the frame on both sides of the character wheel and release the clamping state of the cam member that is clamping the character wheel. A workpiece positioning device featuring: