JP2653876B2 - Parts press-fitting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a part press-fitting device, and more particularly, to a press-fitting unit that holds a part such as a bearing and is capable of moving forward and backward, and a member for press-fitting the part such as a casing. And a supporting mechanism for receiving a reaction force acting on the press-fitting unit when press-fitting the press-fitting unit and preventing unnecessary movement of the press-fitting unit.

[Background of the Invention] For example, an operation of assembling parts such as a bearing and a bush to a casing which is a press-fitted member is generally performed.
In this type of assembling work, a plurality of parts are often pressed into a single casing, and there is a strong demand for mass-producing the casing. Therefore, if the press-fitting operation of the parts depends on the manual work of the operator, it cannot be dealt with at all, and therefore, automation of the press-fitting operation of the parts is desired.

Therefore, various devices have been conventionally proposed to automatically press-fit parts into a press-fitted member. In particular, as a part press-fitting device configured to press-fit two parts,
For example, Japanese Patent Publication No. 52-23112 has been proposed. In this conventional part press-fitting device, a set of press-fit units is engaged with a piston rod extending from a single cylinder via a connecting member, and parts are held in each press-fit unit via a chuck. ing. Therefore, by driving the cylinder, the parts held in the respective press-fitting units can be simultaneously press-fitted into desired holes or the like of the member to be press-fitted.

By the way, in this case, when the cylinder is driven to press the parts into the press-fitted member, a reaction force acts on the press-fitting unit. At this time, if the press-fitting of the part increases, the reaction force acting on the press-fitting unit also increases, which may cause a possibility that the part cannot be reliably press-fitted into the press-fitted member. For this reason, it is conceivable to use a cylinder having a large capacity, but it has been pointed out that it is not efficient and that the entire apparatus becomes large.

[Object of the Invention] The present invention has been made in order to overcome the above-mentioned disadvantages, and a supporting mechanism is provided on a side of a press-fitting unit which holds a part and is capable of moving forward and backward with respect to a press-fitted member. When the press-fitting unit reaches the part press-fitting work position, the support mechanism is engaged with the corresponding press-fitting unit so that the support mechanism receives a reaction force acting on the press-fitting unit at the time of part press-fitting, thereby firmly holding the press-fitting unit. And it is possible to press-fit the parts with a desired press-fit and reliably,
It is an object of the present invention to provide a part press-fitting device that can efficiently downsize a part press-fitting actuator.

Means for Achieving the Object In order to achieve the above object, the present invention is an apparatus for press-fitting a part into a member to be press-fitted, which is fixed on a support table which can move forward and backward in the press-fitting direction. A jig base provided with a bulging portion for positioning and supporting the end face of the work on the downstream side in the press-fitting direction; a press-fitting unit which holds the parts and is capable of moving back and forth toward the jig-holding; A first locking member that is provided and has an inclined surface that is inclined outward toward the rear in the press-fitting direction; and a support that is provided on both sides of the press-fitting unit and that stands on both sides of the press-fitting unit. A second locking member that is capable of moving forward and backward in a direction intersecting the direction and has an inclined surface that inclines inward toward the front in the press-fitting direction, respectively, wherein the press-fitting unit moves to the work side. When After the second locking member is once displaced in a direction away from the elastic body through the respective inclined surfaces, the first and second locking members are engaged with each other to hold the press-fit unit. It is characterized by doing.

[Embodiment] Next, a preferred embodiment of the parts press-fitting device according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, reference numeral 10 denotes a parts press-fitting device according to the present embodiment. The parts press-fitting device 10
A support 14 is erected on one side of the base 12 that constitutes the base.
Transport mechanism 100 that can be transported to a station (not shown)
Is provided. On the other hand, a positioning mechanism 200 for positioning and holding the work W below the transfer mechanism 100 is mounted on the base 12, and is separated from the positioning mechanism 200 by a predetermined distance. Press-in mechanism 300
Is mounted. In this case, the press-fitting mechanism 300 holds, for example, a part P such as a bearing member and press-fits the part P into each of the press-fitting holes 16a and 16b of the work W. The positioning mechanism 200 and the press-fitting mechanism A support mechanism 400 for holding a press-fit unit described later when the part P is press-fitted is mounted between the support mechanism 300 and the component 300.

Therefore, first, the transport mechanism 100 will be described below. The rectangular body 102 that constitutes the transport mechanism 100 extends in a direction (arrow B direction) orthogonal to the press-fit direction (arrow A direction) of the parts P and is fixed to the column 14. , A pair of guide rails 104a, 104b are fixed.
In this case, a rack 106 is engaged with one of the guide rails 104a so as to extend in the direction of arrow B, and the movable body 108 is engaged with the rack 106 and the guide rails 104a and 104b. The movable body 108 is provided with a rotation drive source 112 for rotationally driving a pinion 110 meshing with the rack 106, and a vertically moving rod 114 extends vertically downward from the movable body 108.
Here, a rotary drive source 116 is disposed on the movable main body 108 in a horizontal direction, and a pinion 118 connected to the rotary drive source 116 is provided on a rack 102 formed on a side portion of a lifting rod 114.
(See FIG. 2).

On the other hand, a gripper 122 is provided below the lifting rod 114. The gripping means 122 includes a cylinder 124, and a swing member 13 is attached to a rod 126 extending horizontally from the cylinder 124.
0 engages. The swinging member 130 is fixed to a rotating shaft 132, and open / close arms 134 are provided at both ends of the rotating shaft 132.
a and 134b are fixed. One ends of arm members 138a, 138a and 138b, 138b are engaged with the opening / closing arms 134a, 134b, and substantially centers of the arm members 138a, 138a, 138b, 138b are swingably supported by frames 140a, 140b. .

Holding members 144a and 144b for pressing the upper surface side of the work W are disposed on the frames 140a and 140b. In this case, the holding members 144a, 144b substantially correspond to the respective frames 140a, 140b.
Are configured to be slidable along guide rods 146a, 146b extending downwardly from the rear, and elastic members 148a, 148b are interposed between the holding members 144a, 144b and the frames 140a, 140b.

Next, the positioning mechanism 200 has a jig base 202 mounted on the base 12, and a swelling portion 204 is provided at one end of the jig base 202 so as to extend vertically upward. The projecting portion 204 is provided with a fixed reference surface 206 which is oriented vertically and is smooth. An extruding rod constituting an extruding means 208 is provided at a lower side of the bulging portion 204.
210 is disposed in the bulging portion 204 so as to be oriented in the horizontal direction, and the push rod 210 protrudes by a predetermined amount toward the fixed reference surface 206 via a spring member (not shown). In addition, jig stand 2
02 has a stopper bolt 216 facing the push rod 210.
Are screwed so as to be position-adjustable. This stopper bolt 216
A pair of guide rails 218a and 218b extend in the direction of arrow A and are fixedly attached to the jig base 202 between the guide rails 218a and 218b. Mounted freely.

A receiving plate 222 is fixed to one end of the support table 220, and a plurality of reference seats 224, positioning pins 226, and a work W are fixed to the support table 220 at predetermined positions on the upper surface of the support table 220, respectively. Are mounted. The clamping means 228 is a cylinder 23
One end of the clamp arm 234 is engaged with the piston rod 232 extending vertically upward from the cylinder 230.

Further, the press-fitting mechanism 300 will be described. A base 301 constituting the press-fitting mechanism 300 is provided extending from one end on the base 12 to a vicinity of a jig base 202 constituting the positioning mechanism 200. The guide rails 302a and 302b are fixed to both sides in the short side direction, respectively. A shift cylinder 304 is provided at an end of the base 301, and a piston rod 306 extending from the shift cylinder 304 in the direction of arrow A.
The press-fit unit 308 is engaged with.

The press-fit unit 308 is substantially the same as the piston rod 3
A unit main body 310 is attached to the unit 06 and is movable back and forth along the guide rails 302a and 302b. The unit main body 310 is provided with a pair of press-fit cylinders 312a and 312b. As shown in FIG. 3, the unit body 31 is moved from the press-fit cylinder 312a.
0, the piston rod 314a extends, and a holder 316a is attached to the unit body 310.
In a, an intermediate pressing body 318a and a press-fitting rod 320a are disposed coaxially with the piston rod 314a. That is, the intermediate pressing body 318a is slidably disposed in the holder 316a, and is pressed and biased toward the piston rod 314a via a spring member 322a interposed in the holder 316a. Intermediate pressing body 318a
A stepped hole 324a is formed in the center of the
The small-diameter portion 326a of the press-fit rod 320a is fitted into 4a, and the spring member 328a is engaged with the end of the small-diameter portion 326a.

Press-fit rod 320a penetrates holder 316a and positioning mechanism
The air supply passage 330a extends toward the center 200, and has an air supply passage 330a formed in the center thereof. One end of the passage 330a is bent radially outward in the holder 316a and connected to the conduit 331a, while the other end of the passage 330a is open to the outside from the tip of the press-fit rod 320a. Therefore, a substantially cylindrical support member 332a is fixed to the tip of the press-fit rod 320a via a bolt 334a. The support member 332a has four lead-out passages 336a which are outwardly inclined at equal angular intervals, then bent at an acute angle, inclined toward the press fitting rod 320a with respect to the radially outward direction, and opened outward. Is formed, and the passage 336a communicates with the passage 330a via a passage 338a formed in the bolt 334a. The outer peripheral portion of the support member 332a is selected to have a diameter that fits into the inner peripheral surface of the part P, and is provided with a flange portion 340a with which the end of the part P contacts. Then, the part P is attached to the support member 332a.
A positioning key 344a that fits into the notch 342 for positioning the part P is attached.

On the other hand, the press-fit cylinder 312b has the same configuration as that of the press-fit cylinder 312a described above, and the same components are denoted by the same reference numerals and will not be described in detail.

Each holder 316a, 316b is provided on the front of the unit body 310.
Pressing means 350 is provided between and below. The pressing means 350 has a substantially cylindrical holder 352. The holder 352 is fixed to the unit main body 310, and the end of the clamp rod 356 is inserted into a stepped hole 354 defined in the center. I do. By engaging a spring member 358 with the end of the clamp rod 356, the clamp rod 3
56 is made to protrude by a predetermined length in a direction away from the unit main body 310.

Further, protrusions 360a and 360b are provided on both sides of the unit body 310 so as to protrude outward. The protrusion
360a and 360b are inclined rearwardly (in a direction away from the positioning mechanism 200) and inclined outwardly and inclined surfaces 362a and 362b,
It has locking surfaces 364a, 364b extending outward, and these inclined surfaces 362a, 362b and locking surfaces 364a, 364b are supported by the support mechanism 400.
Engages.

The support mechanism 400 is a pair of columns 402a, 402b that are substantially erected on the base 12 on both sides of the press-fit mechanism 300 described above.
(See FIGS. 1 and 4). Therefore, the support 402a side will be described in detail below, and the same reference numerals as those of the support 402b will be denoted by the letter b, and the detailed description thereof will be omitted.

That is, as shown in FIG. 5, an opening 404a oriented horizontally and having a prismatic shape is formed in the upper part of the support column 402a in the direction of arrow B, and closes one end of the opening 404a. Thus, the cylinder 406a is attached. The piston rod 408a is inserted into the opening 404a from the cylinder 406a.
Enters, and the locking block body 412a engages with the spring receiving member 410a attached to the tip of the piston rod 408a. In this case, the locking block 412a has a housing shape so as to fit into the opening 404a, and the end of the locking block 412a exposed to the outside from the other end of the opening 404a is attached to the unit main body 310a.
An inclined surface 414a corresponding to the inclined surface 362a of the projection 360a, and locking surfaces 415a and 415b corresponding to the locking surfaces 364a and 364b are formed. An opening 416a is defined in the locking block 412a, and the spring receiving member 410a enters the opening 416a, and the end of the spring member 418a contacts the spring receiving member 410a. For this reason, the locking block 412a is constantly urged in a direction away from the piston rod 408a via the elastic force of the spring member 418a.

The parts press-fitting device according to the present embodiment is basically configured as described above, and its operation and effects will be described next.

First, the work W placed in another station (not shown) is carried into the positioning mechanism 200 by the transport mechanism 100. Here, when the workpiece W is gripped by the gripping means 122, the rod 126 is displaced under the driving action of the cylinder 124, and the opening / closing arm 134 is
a, 134b are rotated by a predetermined angle. For this reason, the lower side of the arm members 138a, 138a and 138b, 138b
Swings to the side to hold the work W.

Next, the pinion 118 is rotated under the driving action of the rotary drive source 116, and the lifting rod 1 is moved through the rack 120 meshing with the pinion 118.
The workpiece W is hung by the gripping means 122 by raising 14. Further, the pinion 110 is driven by the rotation drive source 112.
And the movable body 108 via the rack 106 to the guide rail 10
The workpiece W is displaced in the direction of arrow B under the guidance of 4a and 104b to dispose the work W above the positioning mechanism 200. Therefore, while the drive of the rotary drive source 112 is stopped, the rotary drive source 116 is rotated in the opposite direction to the above, the lifting rod 114 is lowered via the pinion 118 and the rack 120, and the rotary drive source 116 is suspended by the gripping means 122. The work W is positioned and mounted on the support table 220 via the reference seat 224 and the positioning pins 226.

In the support table 220, the cylinder 230 constituting the clamp means 228 is driven to press and hold the lower end of the work W via the clamp arm 234. On the other hand, gripping means 122
, The rod 126 is displaced in the opposite direction to the above through the cylinder 124, and the opening and closing arm 1
34a and 134b are rotated in the opposite direction to the above to separate from the work W. Here, the upper surface of the work W is each holding member.
144a and 144b are resiliently engaged.

At this time, the pushing rod 210 constituting the pushing means 208 is resiliently engaged with the supporting table 220, and the end of the supporting table 220 abuts on the stopper bolt 216 and is placed on the stopper bolt 216. The end surface Wa of the work W is separated from the fixed reference surface 206 of the bulging portion 204 by defining a predetermined gap.

Next, the shift cylinder 304 constituting the press-fitting mechanism 300
And press-fit unit 308 to guide rails 302a, 302b
Is moved to the positioning mechanism 200 side under the guide action of. Therefore, first, the clamp rod 3 constituting the pressing means 350
56 is engaged with the receiving plate 222 engaged with the support table 220, and presses the support table 220 toward the bulging portion 204 side. As a result, the support table 220 moves the guide rails 218a, 218
b moves to the bulging portion 204 side under the guide action of
Wa engages the fixed reference surface 206. When the unit body 310 further moves toward the positioning mechanism 200 under the action of the shift cylinder 304, the clamp rod 356 presses the workpiece W against the fixed reference surface 206 under the resilient action of the spring member 358 (Sixth Embodiment). (See FIG. A).

On the other hand, when the unit main body 310 moves to the positioning mechanism 200 side, the projections 360a and 360b provided on both sides of the unit main body 310 engage with the locking block bodies 412a and 412b constituting the support mechanism 400. Here, protrusions 360a, 360b
And the locking block bodies 412a, 412b have inclined surfaces 362a, respectively.
362b and 414a, 414b are formed, and the locking blocks 412a, 412b are pressed inward of the columns 402a, 402b as the unit body 310 moves toward the positioning mechanism 200 side. Accordingly, as shown in FIG. 7a, the locking block bodies 412a, 412b enter the openings 404a, 404b against the resilience of the spring members 418a, 418b and separate from the projections 360a, 360b. When the locking block bodies 412a and 412b
The projections protrude toward the unit main body 310 through the elastic force of a and 418b. As a result, the locking surfaces of the locking block bodies 412a and 412b
415a, 415b engages with the locking surfaces 364a, 363b of the projections 360a, 360b (see FIG. 7b). In this position, the driving of the shift cylinder 304 is stopped.

Next, the press-fit cylinder 312a is driven to drive the piston rod 314a.
When the piston rod 314a is displaced toward the press-fitting rod 320a, the end of the piston rod 314a first engages with the intermediate pressing body 318a, and the intermediate pressing body 318a is pressed against the resilient force of the spring member 322a. To the side. For this reason, the press-fit rod facing the small diameter portion 326a in the stepped hole portion 324a of the intermediate pressing body 318a
320a is displaced toward the work W through the elastic force of the spring member 328a, and the part P, which is held in advance by the support member 332a provided at the distal end thereof, faces the hole 16a of the work W. . At this time, the passage 33 formed in the press-fit rod 320a is
Pressure air is introduced into the passage 330a from an air supply source (not shown) via a conduit 331a connected to one end of the passage 330a.
After being branched and supplied to 336a, it is led out from the outer peripheral portion of the support member 332a. As a result, the part P is pressed toward the flange portion 340a, and the part P can be held on the support member 332a.

Under the action of the press-fit cylinder 312a, the piston rod 314a is further displaced toward the work W, and the press-fit rod 320a is displaced toward the work W with a predetermined pressing force via the intermediate pressing body 318a, thereby changing the part P of the work W. Press into the hole 16a (see FIG. 6b).

After the work of press-fitting the part P into the hole 16a is completed,
When the press-fit cylinder 312a is driven to displace the piston rod 314a in the opposite direction, the intermediate pressing body 318a is
Displaced toward the piston rod 314a through the elastic force of 328a and 322a, and the press-fit rod 320a is further
And displaces toward the piston rod 314a. Accordingly, the support member 332a provided at the distal end of the press-fit rod 320a is separated from the work W.

After the part P is press-fitted into the hole 16a of the work W, the press-fit cylinder 312b is driven to move the press-fit rod 320b toward the work W, and the supporting member
The work of press-fitting the part P held by the 332b into the other hole 16b of the work W is performed in the same manner as described above.

After the parts P are pressed into the holes 16a and 16b of the work W, the support mechanism 400 is driven to release the holding action of the press-fit unit 308. That is, the cylinders 406a and 406b provided on the columns 402a and 402b are driven to displace the piston rods 408a and 408b in a direction away from the unit body 310. Therefore, the spring receiving members 410a, 41 of the piston rods 408a, 408b
The locking block bodies 412a, 412b that engage with 0b have openings 404a,
It enters the 404b and separates from the protrusions 360a, 360b (see FIG. 7c). Therefore, the shift cylinder 304 is driven to displace the unit body 310 in a direction away from the positioning mechanism 200 under the guide action of the guide rails 302a and 302b, and to dispose the unit at a predetermined standby position.

The transport mechanism 100 is driven to grip the workpiece W for which the press-fitting operation of the parts P has been completed by the gripping means 122, and the cylinder 230 constituting the clamping means 228 is driven to separate the clamp arm 234 from the workpiece W. Next, the rotation drive source 1
After raising the gripping means 122 via the lifting rod 114 under the action of 16, the rotary drive source 112 is driven to transport the work W to the next station, while on the support table 220 constituting the positioning mechanism 200. A new work W is placed.

In this case, according to the present embodiment, the shift cylinder 30
When the press-fit unit 308 is displaced toward the positioning mechanism 200 side and stopped under the driving action of 4, the unit body 310 is supported by the support mechanism 400 via the projections 360a and 360b provided on both sides of the unit body 310. Fixedly supported. Therefore, when the press-fitting rods 320a, 320b are displaced toward the work W under the driving action of the press-fitting cylinders 312a, 312b to press-fit the part P into the predetermined holes 16a, 16b, a considerably large press input is required for the part P. , The unit body 310
Does not move in a direction away from the positioning mechanism 200.

That is, at the forward end position of the unit body 310, the fifth
As shown in FIG. 7 and FIG. 7b, the locking surfaces 364a, 364b of the projections 360a, 360b and the locking surfaces 415a, 415b of the locking block bodies 412a, 412b constituting the support mechanism 400 are engaged with each other. ing. Therefore, for example, by driving the press-fitting cylinder 312a to displace the press-fitting rod 320a toward the work W, and pressing the part P held by this into the hole 16a of the work W with a predetermined pressing force, the unit becomes The main body 310 has a positioning mechanism 2
A reaction force acts in a direction away from 00. However, as described above, since the unit main body 310 is held by the support mechanism 400, it is possible to prevent the unit main body 310 from moving away from the positioning mechanism 200.

As a result, an effect is obtained that the part P can be press-fitted into the hole 16a of the work W extremely efficiently without a substantial decrease in the pressing force of the press-fit cylinder 312a. In particular, it does not use a special actuator to receive the reaction force acting on the unit body 310,
Actually, the reaction force receiving function can be achieved by the engagement relationship between the projections 360a, 360b and the locking block bodies 412a, 412b, and as a result, the advantage that the structure is simplified at once is obtained. In addition, the functions of the press-fit cylinders 312a and 312b can be efficiently used in this way,
It is possible to prevent the 2a and 312b from becoming unnecessarily large.

Further, inclined surfaces 362a and 362b are formed on the projections 360a and 360b, and corresponding inclined surfaces 414a and 414b are provided on the locking block bodies 412a and 412b. For this reason, when the unit body 310 moves to the positioning mechanism 200 side, the locking block body is provided via the respective inclined surfaces 362a, 362b and 414a, 414b.
After the 412a, 412b has moved to the support 402a, 402b side, the respective locking surfaces 364a, 364b and the 415a, 415b automatically engage. Therefore, after the part press-fitting operation is completed, the cylinders 406a and 406b need only be driven when the unit main body 310 is separated from the positioning mechanism 200, and the control of the support mechanism 400 is extremely simple.

[Effect of the Invention] As described above, according to the present invention, after the press-fit unit is displaced toward the press-fitted member side, the press-fit unit can be firmly held via the support mechanism. Therefore, it is possible to prevent unnecessary movement of the press-fitting unit due to the reaction force acting on the press-fitting unit when the part is press-fitted into the press-fitted member. Therefore, even when a part is press-fitted with a relatively large press-fit into the press-fitted member, the part can be press-fitted efficiently and reliably without causing a substantial decrease in press-fit. The effect is obtained. Moreover, the configuration of the support mechanism itself is simplified,
There is an advantage that the inconvenience of increasing the manufacturing cost of the entire apparatus can be prevented.

As described above, the present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the gist of the present invention. Of course.

[Brief description of the drawings]

FIG. 1 is a schematic perspective explanatory view of a part press-fitting device according to the present invention, FIG. 2 is a schematic side view of the part press-fitting device, FIG. Fig. 4 is a perspective explanatory view of a support mechanism constituting the part press-fitting device, Fig. 5 is a partial cross-sectional plan view of the support mechanism shown in Fig. 4, and Figs. 6a and 6b show parts by the part press-fitting device. FIG. 7A to FIG. 7C are explanatory views of the support mechanism when press-fitting. 10 ... part press-in device, 100 ... transport mechanism 122 ... gripping means, 200 ... positioning mechanism 228 ... clamping means, 300 ... press-fit mechanism 308 ... press-fit unit, 310 ... unit body 312a, 312b ... Press-fit cylinders 320a, 320b ... Press-fit rods, 400 ... Support mechanism 406a, 406b ... Cylinders 418a, 418b ... Spring members 412a, 412b ... Lock block

Claims (1)

(57) [Claims] An apparatus for press-fitting a part into a press-fitted member, comprising: a bulging portion for positioning and supporting a downstream end face of the work fixed on a support table capable of moving forward and backward in the press-fitting direction. A provided jig base, a press-fit unit that holds the parts and is capable of moving back and forth toward the jig base, and a slant that is provided on both side surfaces of the press-fit unit and that is inclined outward toward the rear in the press-fit direction. A first locking member having a surface, and provided on a column erected on both sides of the press-fit unit,
A second locking member that is capable of moving forward and backward in a direction intersecting the press-fitting direction via an elastic body, and that has an inclined surface that is inclined inward toward the front in the press-fitting direction, respectively. When the second locking member moves toward the work side, the first and second locking members are displaced through the respective inclined surfaces in a direction in which the second locking member temporarily separates against the elastic body. A parts press-fitting device which engages with each other to hold the press-fitting unit.