JP2006297564A - Multi-kind bush press-fitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-kind bush press-fitting device capable of shortening a processing time adapted many kinds of bushes and structures. <P>SOLUTION: This multi-kind bush press-fitting device 1 press-fits bushes 21a, 21b of specifications corresponding to respective bush press-fit holes into bush press-fit holes 11a, 11b formed at a plurality of positions of a structure 2. This device comprises a grip moving unit 3 for gripping and moving the structure 2, a bush press-fit unit 5 for press-fitting the bushes into the bush press-fit holes, a bush feed unit 6 for feeding the bushes to the bush press-fit unit 5, attachments 7a, 7b installed to the bush press-fit unit 5 and receiving press-fit direction tips of the press-fitted bushes, and an attachment replacing unit 7 replacing attachments according to the specification of the bush. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bush press-fitting device for press-fitting a bush into bush press-fitting holes provided at a plurality of locations in a structure. The present invention relates to a bush press-fitting device for press-fitting each bush press-fitting hole.

Conventionally, a bush press-fitting device for press-fitting a bush into bush press-fitting holes provided at a plurality of locations in a structure is well known, and bush press-fitting that presses various types of bushes individually into each of the bush press-fitting holes. There are also documents that disclose devices (see, for example, Patent Documents 1 and 2).
In Patent Documents 1 and 2, an apparatus is disclosed in which one head holder is moved to the positions of bush press-fit holes provided at a plurality of locations, and the bushes corresponding to the bush press-fit holes are press-fitted. There are many types of bushes to be press-fitted, and bushes having specifications corresponding to the bush press-fit holes are press-fitted into the respective bush press-fit holes.

It is also well known that a number of bush press-fitting units equal to the number of bush press-fitting holes are provided, and the bush press-fitting unit is configured to press-fit the bushes.
For example, as shown in FIG. 7, like a frame-like suspension member frame 80 that supports a suspension or differential device of an automobile, front bush press-fit holes 81L and 81R, rear bush press-fit holes 82L and 82R, and differential mount bush press-fit holes 83L. In the case where a total of six bush press-fit holes 83R are provided, a total of six bush press-fit units 84a to 84f are arranged in one bush press-fitting device. Further, as shown in FIG. 8, in order to correspond to two types of suspension member frames 80 and 85, there is a configuration in which a total of 12 bush press-fit units 84a to 84l are arranged in one bush press-fit device.
JP-A 63-306841 JP-A 63-306842

With respect to the above-described conventional technology, the devices disclosed in Patent Documents 1 and 2 are compatible with press-fitting of various types of bushes, but it is necessary to move the head holder when replacing the head. Since the movement requires time, there is a problem that the processing time becomes long.
As described above, in the configuration including the movable head holder, a problem occurs due to the moving time of the head holder.

On the other hand, in the case of a configuration in which a number of bush press-fitting units are provided in one bush press-fitting device, there is a problem that it is not possible to handle many types of frames. For example, if a bush press-fitting device is manufactured with the configuration shown in FIG. 7 at the time of new installation of the equipment, it cannot be adapted to a frame of another structure. In this case, it is conceivable that the modification is performed on site, but a modification period is required, and the modification may not be possible due to the structure of the apparatus. Moreover, although the response | compatibility by replacing the bush press-fitting apparatus of the structure shown in FIG. 8 and equipment is also considered, there also exists a problem that a big cost starts.
As described above, in the configuration including a large number of bush press-fitting units, each bush press-fitting unit is sometimes fixed, and there is a problem that it is difficult to cope with many types of structures (frames).

  Therefore, the present invention proposes a multi-type bush press-fitting device that can shorten the machining time and can cope with various types of bushes and structures.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, as described in claim 1, a multi-type bush press-fitting device for press-fitting a bush having a specification corresponding to each bush press-fitting hole into each bush press-fitting hole provided in a plurality of locations of the structure, A gripping movement unit for gripping and moving an object; a bush press-fitting unit for press-fitting a bush into the bush press-fitting hole; a bush supply unit for supplying the bush to the bush press-fitting unit; and the bush press-fitting A bush press-fitting hole which is provided in the unit and receives an attachment for receiving a press-fitting end portion of the bush to be press-fitted in accordance with the specifications of the bush. The bush press-fitting unit is used with the bush supply unit. An attachment having a specification corresponding to a bush press-fitting hole that is positioned relative to the bush press-fitting unit is supplied to the bush press-fitting unit by the attachment replacement unit, and the structure is moved by the gripping movement unit. The bush press-fitting device is configured such that the bush press-fitting hole is sequentially positioned with respect to the bush press-fitting unit and the bush is press-fitted by the bush press-fitting unit.

  According to a second aspect of the present invention, there is provided an axial center position measuring unit configured to measure the position of the axial center of the bush press-fitting hole by moving the structure and setting the bush press-fitting hole in the insertion member. The shaft center position measurement unit feeds back the amount of deviation between the ideal position and the actual position of the shaft center of the bush press-fitting hole stored in advance in the shaft center position specifying unit to the gripping movement unit, and The holding and moving unit is configured to position the bush press-fitting hole with respect to the bush press-fitting unit after correcting the amount of deviation.

  According to a third aspect of the present invention, the bush supply unit is configured to sequentially feed out a tray on which the bush is placed, and a groove portion having a V-shape in a plan view is provided on a side surface of the tray. A detent mechanism is provided on each side of the bush press-fitting unit in the tray conveying direction, and a forward / backward rod of the detent mechanism is inserted into the groove of the tray; The distance between the forward and backward rods of the detent mechanism arranged upstream and downstream of the press-fitting unit is configured to be larger than the width of two trays in the tray transport direction.

  Further, as described in claim 4, each of the gripping moving unit, the shaft center position specifying unit, the bush press-fitting unit, the bush supply unit, and the attachment replacement unit is in accordance with a prescribed operation schedule. It is set as the structure controlled by a control apparatus to operate | move.

In the invention according to the first aspect described above, the bush can be press-fitted in accordance with the difference in the shape of the structure and the position of the bush press-fitting hole, and the equipment can be used for various types of structures. Can do.
Moreover, by setting various bushes to the bush supply unit and supplying them, it is possible to press-fit many types of bushes with a single bush press-fit unit, and to make the bush press-fit device versatile.

  In the invention according to claim 2, in the bush press-fitting unit, the bush press-fitting hole is set at a specified position, and when the bush is press-fitted, smooth press-fitting of the bush is performed without causing a large resistance. Can be implemented.

  In the invention according to claim 3, a gap is formed between the table of the bush press-fitting unit and the front and rear trays, and the movement of the mount of the bush press-fitting unit in the bush press-fitting direction is allowed. Thereby, when setting the site | part of the bush press-fitting hole of a structure to a mount, it can prevent a structure and a bush from interfering by moving a mount appropriately.

  In the invention according to claim 4, the processing time can be shortened by overlapping the periods of the transfer of the bush to the bush press-fitting unit, the replacement operation of the attachment, and the movement operation of the structure. .

  FIG. 1 shows bushes 21a, 21b, having specifications corresponding to the bush press-fit holes 11a, 11b,... According to the present invention. A multi-type bush press-fitting device 1 for press-fitting, and a gripping moving unit 3 that grips and moves the structure 2, and a bush 21a in the bush press-fitting holes 11a, 11b,. The bush press-fitting unit 5 for press-fitting 21b ..., the bush supply unit 6 for supplying the bushes 21a, 21b ... to the bush press-fitting unit 5, and the bush press-fitting unit 5 are provided. The attachments 7a, 7b,... That receive the press-fitting direction front end portions of the bushes to be pressed are replaced according to the specifications of the bushes 21a, 21b,. A bushing having a specification corresponding to a bush press-fitting hole positioned with respect to the bush press-fitting unit 5, and supplying the bush press-fitting unit 5 with the bush press-fitting unit 5. An attachment having a specification corresponding to a bush press-fitting hole positioned with respect to the unit 5 is supplied to the bush press-fitting unit 5 by the attachment replacement unit 7, and the structure 2 is moved by the gripping movement unit 3, The bush press-fit holes 11a, 11b,... Are sequentially positioned with respect to the bush press-fit unit 5, and the bush press-fit unit 5 press-fits the bush.

By configuring in this way, the bush can be press-fitted in accordance with the difference in the shape of the structure 2 and the position of the bush press-fitting holes 11a, 11b,... It can be equipment.
Further, by setting and supplying various bushes 21a, 21b, etc. to the bush supply unit 6, it is possible to press-fit various types of bushes 21a, 21b,. A general-purpose bush press-fitting device can be achieved.
For example, in automobile manufacturing, even if a vehicle type is added and the specifications of the structure are changed, it can be handled with the same device configuration, so that the equipment cost caused by the addition of the vehicle type can be kept low. Become.

In detail, the gripping moving unit 3 is configured to be able to move or rotate the structure 3 in a three-dimensional direction while gripping the structure 2. For example, it is configured by a multi-axis multi-joint robot arm.
Further, in the example shown in the figure, a suspension member frame of an automobile is gripped by the gripping movement unit 3 as the structure 2, and the bush press-fitting holes 11 a, 11 b,.・ (Front, rear, and differential mounts are provided).

Further, the gripping moving unit 3 sequentially moves each part of the bush press-fitting holes 11a, 11b... Of the structure 2 to the position of the bush press-fitting unit 5, and performs positioning with respect to the bush press-fitting unit 5.
Further, as shown in FIG. 2, the bush press-fitting unit 5 is configured such that a table 5b is moved in the vertical direction in the figure by an actuator 31 in a C-shaped gantry 5b in side view, and is placed on the table 5b. The pressed bush 21a is press-fitted into the bush press-fitting hole 11a.
Further, in the bush press-fitting unit 5, the gantry 5b is configured to be moved in the vertical direction in the drawing by the actuator 32, and when the portion of the bush press-fitting hole 11a of the structure 2 is set on the gantry 5b, By appropriately moving the mount 5b, the structure 2 and the bush 21a are prevented from interfering with each other.

Further, when the bush is press-fitted (when insertion of the bush into the bush press-fitting hole is started), the burden on the gripping movement unit 3 side due to the displacement of the shaft center of the bush press-fitting hole 11 is reduced, and at the time of bush press-fitting For the purpose of floating, the servo lock-off function of the gripping movement unit 3 (function that allows the movement of the structure 2) is used, and the bushing is press-fitted with the structure 2 fixed in a free state. I have to.
In the servo lock-off function, when a load exceeding a specified value is applied to the gripping movement unit 3, the servo lock of each shaft portion is automatically released, and when the servo lock is applied again, the original position ( It is configured to return to the position where the structure 2 is fixed.

  Also, as shown in FIGS. 1 and 2, the structure 2 is moved and the bush press-fitting hole 11a is set on the conical insertion member 4a to measure the position of the axial center of the bush press-fitting hole 11a. The axial center position measuring unit 4 is provided. In the axial center position measuring unit 4, the deviation amount between the ideal position and the actual position of the axial center of the bush press-fitting hole 11a stored in the axial position specifying unit 4 in advance. Is fed back to the gripping movement unit 3, and the amount of displacement is corrected by the gripping movement unit 3, and then the bush press-fitting hole 11 a is positioned with respect to the bush press-fitting unit 5.

  With this configuration, in the bush press-fitting unit 5, the bush press-fitting hole 11a is set at a specified position, and smooth press-fitting of the bush is performed without causing a large resistance when the bush is press-fitted. can do.

Further, as shown in FIG. 1, the bush press-fitting unit 5 is provided on a conveyance line 6a of a bush supply unit 6 that sequentially conveys the bushes 21a, 21b,.
In the bush supply unit 6, trays 6b, 6b,... Are arranged on the transport line 6a, and bushes 21a, 21b,. . Further, the trays 6b, 6b,... Are transported in the direction of the bush supply unit 6 at any time by the delivery device 6c.
Further, the arrangement order of the bushes 21a, 21b,... Placed on the trays 6b, 6b,... Corresponds to the order in which the bushes are press-fitted in the bush press-fitting holes 11a, 11b,. The bushes 21a, 21b,... Having specifications corresponding to the bush press-fit holes 11a, 11b,. For example, as shown in FIG. 3, three types of bushes 21p, 21q, and 21r are prepared and set on the trays 6b, 6b,.

Further, the configuration for supplying (replenishing) the bushes 21a, 21b,..., And the tray 6b to the bush supply unit 6 is not particularly limited, and may be supplied manually or by a dedicated supply device. It may be supplied. Moreover, it is good also as a structure which circulates the empty tray 6b after press injection, and returns in order to the sending-out apparatus 6c side.
In the present embodiment, the tray 6b and 6b are transported at a high speed one by one for each rotation of the rotor 6d by the feeding device 6c using the cam mechanism. However, it is not particularly limited to this configuration.

  Further, as shown in FIGS. 2 and 4, the trays 6 b are placed one by one on the table 5 a of the bush press-fitting unit 5. The table 5a is moved upward in the figure by the actuator 31, and the bush 21a placed on the tray 6b is press-fitted into the bush press-fitting hole 11a.

  As shown in FIG. 4, the bush supply unit 6 is configured to sequentially feed out the trays 6b, 6b on which the bushes 21a, 21b,. Grooves 6v and 6v having a V-shape in plan view are provided on the side surfaces, and detent mechanisms 25 and 25 are provided on both sides of the bush press-fitting unit 5 in the conveying direction of the tray 6b. Rollers 25b and 25b provided at the front ends of the advance and retreat rods 25a and 25a of the detent mechanisms 25 and 25 are inserted into the grooves 6v and 6v of the trays 6b and 6b, respectively, and upstream and downstream of the bush press-fitting unit 5 The distance L1 between the advancing and retracting rods 25a and 25a of the detent mechanisms 25 and 25 arranged in the position is the width L of the tray 6b in the transport direction of the tray 6b It is that a is configured larger than the width of the two sheets of. In the detent mechanisms 25, 25, the advance / retreat rods 25a, 25 are urged by an internal spring mechanism in the extending direction.

With this configuration, as shown in FIG. 5, after the tray 6b is placed on the table 5a of the bush press-fitting unit 5, the front and rear trays 6b and 6b are extended by the forward and backward rods 25a and 25a, respectively. They are shifted to the front side and the rear side, respectively, and gaps 28 and 28 having widths L3 and L4 are formed between the table 25a and the front and rear trays 6b and 6b, respectively.
In this way, by forming the gaps 28 and 28 having the widths L3 and L4 between the table 5b and the trays 6b and 6b, as shown in FIG. 2, in the bush press-fitting direction of the frame of the bush press-fitting unit, Movement is allowed. Thereby, when setting the parts of the bush press-fitting holes 11a, 11b... Of the structure 2 to the mount 5b, the structure 2 and the bush 21 are prevented from interfering by appropriately moving the mount 5b. Can do.

Further, as shown in FIG. 2, the frame 5b of the bush press-fitting unit 5 is moved up and down by the actuator 32. In this case, the position of the table 5b is returned to a specified position, and the table 5b of the tray 6b is moved to the table 5b. Need to be able to supply
Therefore, the table 5b is provided with a positioning pin 5c projecting downward in the figure, and the positioning pin 5c is inserted into a pin insertion hole 30 fixed to the base side of the apparatus.
With this configuration, the table 5b is surely set at a specified position, and the tray 6b can be smoothly transported without delay.

  In addition, as shown in FIG. 2, in the bush press-fitting unit 5, an attachment 7a for receiving the front end of the bush 21a to be press-fitted in the press-fitting direction is provided on the upper portion of the frame 5b. The specifications (shape and dimensions) of the receiving portion (the shape of the lower end portion in the figure) of the attachment 7a correspond to the specifications (shape and dimensions) of the tip portion (the upper end portion in the figure) in the press-fitting direction of the bush 21a to be press-fitted. As a result, the bush 21a can be reliably press-fitted at a specified position.

As shown in FIG. 1, the attachments 7a, 7b,... Are appropriately replaced by the attachment replacement unit 7 according to the specifications of the bushes 21a, 21b,.
In the configuration of FIG. 1, various types of attachments 7 a, 7 b... Are prepared in the attachment holder 8, and the attachment replacement unit 7 is configured according to the specifications of the bushes 21 a, 21 b. .. Are appropriately extracted from the attachment holder 8 and replaced with the attachment of the bush press-fitting unit 5 which has already been set.
In addition, about the structure of the attachment replacement | exchange unit 7 or the attachment holder 8, it is not specifically limited to a present Example, Moreover, about the specific structure, it is comprised by a known technique.

In the above configuration, the gripping movement unit 3, the shaft center position specifying unit 4, the bush press-fitting unit 5, the bush supply unit 6, and the attachment replacement unit 7 should operate according to a prescribed operation schedule. The configuration is controlled by a control device.
The prescribed schedule is, for example, as shown in FIG. 6. The structure 2 is gripped by the gripping movement unit 3 (structure gripping A), and the bushing is pressed by the shaft center position specifying unit 4. After correcting the displacement amount of the hole (structure movement B), the structure 2 is moved to the position of the bush press-fitting unit 5 (structure movement C). During the movement of the structure 2, the bush supply unit 6 transports the bush (bush transport D) and replaces the attachment (attachment replacement E). Then, the bush is press-fitted by the bush press-fitting unit 5 (bush press-fitting F).

In this example, since the bush conveyance and the attachment replacement are performed while the structure 2 is moved, it is possible to shorten the time (cycle time) required to complete the bush press-fitting.
In this manner, by overlapping the periods of the bush transfer to the bush press-fitting unit 5 and the attachment replacement operation and the moving operation of the structure 2, the processing time can be shortened.

The figure shown about the structure of the multi-type bush press-fitting device which concerns on this invention. The figure shown about the structure of a bush press-fit unit and an axial center position specific unit. The figure shown about three types of bushes. The figure explaining conveyance of a tray. The figure shown about the clearance gap formed between a tray and a bush press-fit unit. The figure shown about the example of the operation | movement schedule of each unit. The figure shown about the structure of the conventional bush press-fitting device. The figure shown about the structure of the bush press-fit apparatus made into the structure corresponding to two types of structures.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multi-type bush press-fitting device 2 Structure 3 Gripping and moving unit 4 Shaft center position specifying unit 5 Bush press-fitting unit 6 Bush supply unit 7 Attachment exchange unit 7a Attachment 21a Bush

Claims (4)

A multi-type bush press-fitting device for press-fitting bushes with specifications corresponding to each bush press-fitting hole into each bush press-fitting hole provided at multiple locations of the structure,
A holding and moving unit for holding and moving the structure;
A bush press-fitting unit for press-fitting a bush into the bush press-fitting hole;
A bush supply unit for supplying the bush to the bush press-fit unit;
An attachment replacement unit that is provided in the bush press-fitting unit and that receives an attachment for receiving the front end of the press-fitted bush according to the specifications of the bush;
Comprising
A bush having a specification corresponding to a bush press-fitting hole positioned with respect to the bush press-fitting unit is supplied to the bush press-fitting unit by the bush supply unit,
An attachment having a specification corresponding to a bush press-fitting hole positioned with respect to the bush press-fitting unit is supplied to the bush press-fitting unit by the attachment replacement unit,
A multi-type bush press-fitting device configured to move the structure by the gripping movement unit, sequentially position the bush press-fitting hole with respect to the bush press-fitting unit, and press-fit the bush by the bush press-fitting unit. . An axial center position measurement unit configured to measure the position of the axial center of the bush press-fit hole is provided by moving the structure and setting the bush press-fit hole in the insertion member,
In the shaft center position measurement unit, the deviation amount between the ideal position and the actual position of the shaft center of the bush press-fitting hole stored in advance in the shaft center position specifying unit is fed back to the gripping movement unit,
The gripping movement unit is configured to position the bush press-fitting hole with respect to the bush press-fitting unit after correcting the deviation amount.
The multi-type bush press-fitting device according to claim 1, wherein: The bush supply unit is configured to sequentially feed out a tray on which the bush is placed,
Each side surface of the tray is provided with a V-shaped groove portion in plan view,
A detent mechanism is provided on each side of the bush press-fitting unit in the tray conveyance direction,
The forward / backward rod of the detent mechanism is inserted into the groove of the tray,
The distance between the advance and retreat rods of the detent mechanism arranged upstream and downstream of the bush press-fitting unit is configured to be larger than the width of two trays in the tray transport direction.
The multi-type bush press-fitting device according to claim 1 or 2, characterized in that Each unit of the gripping movement unit, the shaft center position specifying unit, the bush press-fitting unit, the bush supply unit, the attachment replacement unit,
It is configured to be controlled by a control device to operate according to a specified operation schedule.
The multi-type bush press-fitting device according to any one of claims 1 to 3, wherein

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