JPH0650096Y2 - Automatic assembly device for ring spring for internal fitting - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for assembling a ring-shaped spring for internal fitting to a predetermined work, which utilizes elastic force when expanding and deforming. The present invention relates to an assembling device that can be used when assembling a key spring of a synchromesh device in a machine.

2. Description of the Related Art A synchromesh device that has been generally used in a transmission for an automobile has a structure in which three shifting keys are held by two ring-shaped key springs. To briefly explain this, as shown in FIG. 3, a clutch hub 2 is arranged in a spline-fitted state on the inner peripheral side of a clutch hub sleeve 1 having a shift fork groove formed on the outer periphery. Is to be fitted to an output shaft (not shown) by means of splines 3 formed on the inner peripheral surface thereof, and grooves 4 along the axial direction are formed at three equally spaced intervals on the outer peripheral portion thereof. The shifting key 5 is inserted in the number 4. The shifting key 5 is arranged such that a convex portion 6 formed on the back surface is fitted in a concave portion 7 formed on the inner surface of the clutch hub sleeve 1, and two ring-shaped key springs 8 fitted on the inner peripheral side thereof are used. Since the shifting key 5 is pressed in the outer peripheral direction, when the shifting key 5 moves in the axial direction with respect to the clutch hub sleeve 1, the key spring 8 is caused by the concave portion 7 and the convex portion 6.
It is designed to be slightly displaced inward while deforming and shrinking.

In the case of assembling the above synchromesh device, generally, the clutch hub 2 is first concentrically arranged inside the clutch hub sleeve 1 to form a sub-assembly, and three shifting keys are manually attached to the sub-assembly. 5
Is inserted into the groove 4 on the outer circumference of the clutch hub 2, and the cutout portion of the key spring 8 is pinched with a finger to be contracted and deformed, and this is fitted inside the shifting key 5.

Problems to be solved by the invention However, since the above-mentioned assembly work is a small work using the fingertips because it is a small target part, and it is a monotonous repetitive work, it is a heavy burden on the worker, and for that reason There was a problem that work was delayed and out of stock.

In order to solve such a problem, mechanization of assembly work can be considered, but in that case, a mechanism for performing work such as supplying components in a predetermined posture and positioning with respect to components to be assembled is required. Therefore, for example, the key spring 8 needs a mechanism for carrying out each work in a predetermined posture, holding in a state of being contracted and deformed, and assembling to the sub-assembly. Therefore, as a supply mechanism of the ring-shaped spring, it is conceivable to use the mechanism used in the assembly device of the piston ring, which is similar in shape to the ring-shaped spring. The mechanism is described in, for example, Japanese Patent Laid-Open No. 56-45339 and Japanese Utility Model Laid-Open No. 57-140931. Among the piston rings stacked and held in the magazine, the one at the bottom end or the top end is It is configured to cut out one by one by the extruding member set to the following thickness. With such a mechanism, it may be possible to perform so-called single picking of the ring-shaped spring and supply it to a predetermined location. However, the techniques described in the above-mentioned publications are assembled in an expanded and deformed state. Since it is intended for the piston ring, even if the process of supplying the annular spring can be diverted, the assembly process cannot be diverted, and it was necessary to develop a new mechanism. .

The present invention has been made in view of the above circumstances, and an object thereof is to provide an automatic assembly device for a ring-shaped spring which is assembled in a state of being contracted and deformed like the key spring described above.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a ring-shaped spring, a part of which is cut open, with its cutout part in contact with a guide means so that their postures are aligned and closely contacted with each other. A plurality of magazines to be fitted together, pressing means for pressing the annular springs to one end side of the magazine, and annular springs arranged at the one end side of the magazine and located at the leading edge of the one end side of the magazine The cutout portion is on the rear side in the moving direction, and at least three places of the two end portions of the cutout portion and the curved intermediate portion are placed so that the inside diameter of the cutout portion can be reduced so as to be deformable to the inner peripheral side. A cutting plate, first driving means for moving the cutting plate back and forth in a direction orthogonal to the arrangement direction of the ring-shaped springs in the magazine, and forward of the one end of the magazine in the moving direction. Is arranged at the delivery position located on the side of the cutout plate, the cutout plate holds a ring-shaped spring by notching a part of the peripheral wall portion on the cutout plate side so that the ring-shaped spring is reduced and deformed and enters. A substantially cylindrical holder that shrinks and deforms and holds it on the inner circumference, and a holder that is housed inside the holder so as to be relatively movable in the axial direction and that is elastic in the direction opposite to the part that holds the ring-shaped spring with respect to the holder. And a second driving means for driving the pushing plate in a direction opposite to the elastic biasing direction.

Function In the device of the present invention, a large number of ring-shaped springs, which are partially cut open, are fitted into the magazine in close contact with each other and in parallel.
Retained. In that case, since the cutout portion comes into contact with the guide means to set a predetermined posture, the postures of all the ring-shaped springs held in the magazine are aligned. Since the ring-shaped springs aligned in this way are pushed toward the one end side of the magazine by the pushing means, by sequentially cutting from the leading end by the cutting plate provided on the one end side of the magazine, Move gradually to one end of the magazine. The cutout plate is reciprocally moved by the first drive means in a direction orthogonal to the arrangement direction of the ring-shaped springs in the magazine. The moving direction is a direction in which the cutout portion of the ring-shaped spring is rearward, and the feeding posture of such a ring-shaped spring is such that even if the operating direction of the cutting plate is constant, the posture of the ring-shaped spring is adjusted by the guide means. Since they are aligned, they are secured at all times, and at least three points of the two ends of the cutout portion and the curved intermediate portion are held even during the feeding, so that they are kept by the cutout plate. The ring-shaped spring advanced to the delivery position is pushed into the holder from the part of the holder that is partially cut, and elastically contracts and deforms at that time. In this case, an external force acts on the ring-shaped spring from the outer peripheral side of the curved portion on the side opposite to the cut-out portion, so that the ring-shaped spring is reduced and deformed so that the cut-out portion is closed and at the same deformation amount. The ring-shaped spring housed inside the holder moves together with the holder when the second driving unit drives the pushing plate. Then, when the holder comes into contact with a predetermined object, the push-out plate moves forward relative to the holder, so that the ring-shaped spring is pushed by the push-out plate to be pushed out from the holder and assembled to the target. That is, the movement of the holder with respect to the object and the assembling of the ring-shaped spring are performed by a single drive means.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of the present invention by omitting a main body portion such as a base, a column or a bracket, and FIG. 2 is a schematic sectional view showing the same. The key spring 8 is assembled to the sub-assembly including the clutch hub sleeve 1 and the clutch hub 2. That is, the magazine 10 that holds many key springs 8
Is a substantially semi-cylindrical shaft having an outer shape similar to the inner peripheral shape of the key, and the cutout portions of the key spring 8 are aligned by a plate 11 which is a guide means protruding left and right from its flat surface. There is. At the lower end side of the magazine 10, there are arranged a holding plate 12 having a shape that allows the key spring 8 to pass therethrough, and a cutting plate 13 that moves back and forth in surface contact with the lower surface of the holding plate 12. This cut-out plate 13 is for sending out the key springs 8 one by one, and at the tip end thereof, three places are formed so that the center part of the key springs 8 and both ends of the cut-out part are placed. A holding portion 14 which is set lower by the amount is formed, and the cutout plate 13 is guided by a guide 15 so as to advance from the cutout portion side of the key spring 8 fitted in the magazine 10 by an air cylinder 16. It is configured to move back and forth.

Assembly jig 17 that receives the key spring 8 from the cutout plate 13
Is composed of a holder 18 and a pushing plate 19. The holder 18 is a cylindrical member whose peripheral wall facing the cutout plate 13 is cut out, and its inner diameter is set to be slightly smaller than the outer diameter of the key spring 8 in the free state. Is configured to press the key spring 8 from the side of the peripheral wall of the opening to reduce and deform and hold the key spring 8. The extruded plate 19 is a plate material that is in close contact with the inner peripheral surface of the holder 18 and partially protrudes into the opening of the peripheral wall of the holder 18.
It is configured to be relatively movable with respect to 18 in the axial direction, that is, the vertical direction. The mounting state of the assembling jig 17 is as shown in FIG. 2, and the pushing plate 19 is fixed to the upper end portion of the rod 21 which is erected on the elevating plate 20, and the holder 21
18 is pushed up by a coil spring 22 fitted to the outer periphery of the rod 21 and held so as to be integrated with the pushing plate 19. The lift plate 20 is attached to the tip of a rod of an air cylinder 24 mounted upward on the slide base 23, and a guide rod 25 protruding from the lower surface of the lift plate 20 slidably penetrates the slide base 23. .

The slide base 23 moves the assembly jig 17 between the forward end of the cutting plate 13 and the lower position of the work 26, and moves back and forth along the guide rail 27 as shown in FIG. Moreover, the driving is performed by the air cylinder 28.

The key spring 8 is assembled by the device constructed as described above as follows.

First, when a large number of key springs 8 are fitted into the magazine 10 and a weight W is placed on the upper side thereof, the key springs 8 pass through the holding plate 12 and are pressed against the upper surface of the cutout plate 13. In this state, place the cutting plate 13 on the air cylinder.
When it is retracted by 16, the holding portion 14 is replaced by the key spring 8
Since it is located on the lower side, the key spring 8 at the lowermost end goes down from the lower surface of the pressing plate 12 and rests on the holding portion 14. Then, when the cutting plate 13 is moved forward, the key spring 8 placed on the holding portion 14 is sent out forward, and in that case, the movement of the other key springs 8 is blocked by the holding plate 12 and the succeeding key springs are blocked. 8 contacts the upper surface of the cutout plate 13 and is prevented from descending further.
Since the key spring 8 mounted on the holding portion 14 is supported only at three points, that is, the central portion and both end portions thereof, it can be reduced and deformed. Therefore, when the cutout plate 13 reaches the forward end, The spring 8 is pushed into the holder 18 to be contracted and deformed, and is held inside the holder 18 in that state. The assembly jig 17 is driven by the slide base 23 driven by the air cylinder 28 so that the work 26
Of the assembly jig together with the lift plate 20.
The air cylinder 23 raises 17 toward the work 26. Here, the work 26 is a sub-assembly consisting of the clutch hub sleeve 1 and the clutch hub 2 to which the three shifting keys 5 are attached.
When the holder 18 is raised, it comes into contact with the end surface of the shifting key 5 and its rise is restricted. Therefore, the elevating plate 20 is further raised while compressing the coil spring 22, so that the pushing plate 19 is relatively raised with respect to the holder 18, and the key spring 8 in the holder 18 is horizontally pushed out.
As a result, the key spring 8 enters the inside of the shifting key 5 and elastically expands, pushing the shifting key 5 to the outer peripheral side and fixing it to the inner peripheral surface of the clutch hub sleeve 1.

That is, one key spring 8 is taken out and attached to the work 26 by the series of operations described above.

The above-described embodiment is an example in which the key spring is in a horizontal state and the key spring is assembled from the lower side of the work, but the invention is not limited to the above-described embodiment, and the upper side of the work is attached. The key spring may be assembled from the above, or the key spring may be vertically set and assembled. Further, the ring-shaped spring covered by the present invention is not limited to the key spring shown in the above embodiment.

EFFECTS OF THE INVENTION As is apparent from the above description, according to the device of the present invention, when the ring spring for internal fitting, which is partially cut open, is attached to the holder which is the assembly jig, the cutout portion of the ring spring is opened. Since the bending portion on the side opposite to the pushing portion is pushed into the holder from the cutout portion of the holder, the external force for reducing and deforming the ring-shaped spring always acts from the outer peripheral side of the bending portion. , Even if it is a ring-shaped spring with the cutout part bent outward,
The same deformation amount can be constantly reduced and deformed, and thus reliable assembly can be performed. In addition, such assembling, the holding posture of the ring-shaped spring in the magazine,
The guide means utilizing the cutout portion is used for alignment, and the one end portion of the magazine is cut out by a cutout plate which moves back and forth so that the cutout portion is located rearward in the feeding direction. By keeping the posture even during feeding, it can be surely performed. Therefore, according to this invention, it is possible to automatically and surely perform a series of operations from supplying the ring-shaped spring, attaching it to the holder, and assembling it to the target parts, and reduce the burden on the operator. It is possible to eliminate inconveniences such as shortages and prolonged working time. Further, in this invention, the ring-shaped spring can be attached to the holder by reciprocating the cutout plate between the one end of the magazine and the delivery position. The overall configuration of the automatic assembly device can be made compact.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention, FIG. 2 is a schematic sectional view thereof, and FIG. 3 is a schematic sectional view of a synchromesh device which is an example of a product having a ring-shaped spring. 8 ... Key spring, 10 ... Magazine, 13 ... Cutting board, 14
… Holding part, 17… Assembly jig, 18… Holder, 19… Extrusion plate,
20 ... Elevating plate, 21 ... Rod, 22 ... Coil spring, 23 ...
Slide base.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Saijo 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Nagatoshi Kurata 130-1 Oike, Hanemachi, Okazaki City, Aichi Prefecture (56) References JP-A-60-34240 (JP, A) JP-A-62-39133 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A magazine in which a plurality of ring-shaped springs partially cut open are brought into contact with the guide means so that the postures thereof are aligned and in close contact with each other, and a large number of them are fitted in parallel. A pressing means for pressing to one end side and a ring-shaped spring arranged at the one end side of the magazine and located at the tip of the one end side of the magazine have the cutout part on the rear side in the moving direction and the cutout part. Of 2
A cutting plate that holds at least three points, one end and a curved middle part, and is deformably held on the inner peripheral side so that the inner diameter becomes small, and the direction in which the ring springs are arranged in the magazine. First driving means for moving back and forth in a direction orthogonal to and a delivery position located at the front side in the moving direction from one end of the magazine, and the ring-shaped spring held by the cutout plate is contracted while being deformed. To cut out a part of the peripheral wall portion on the side of the cutout plate and hold the inner peripheral portion by contracting and deforming the ring-shaped spring as the cutout plate advances, and a holder inside the holder. A push-out plate that is housed so as to be relatively movable in the axial direction and that is elastically biased in the direction opposite to the part that holds the ring-shaped spring with respect to the holder, and the push-out plate that elastically biases the push-out plate. Automatic assembling apparatus of fit for circular spring, characterized in that it comprises a second driving means for driving in the opposite direction to the.