JPH01114580A - Undercarriage assembling device in automobile assembling line - Google Patents

Abstract

PURPOSE:To cope with the assembling work of wheel-bases of various sizes by providing the holding parts, which correspond to respective article parts on the rear or front side of a jig pallet on which each article on the front or rear side can be mounted after it is positioned, in such a manner that the fore-and-aft-position of the holding parts can freely be adjusted. CONSTITUTION:Coping with the difference in the size of the wheel-base, the fore-and-aft-position of either a holding part H2 for a rear-side article part X2 or a holding part H1 for a front-side article part X1 is adjusted. As a result, it becomes possible to assemble wheel bases of different sizes by using only one kind of jig pallet P. When the jig pallet P is carried to a setting point K2, the pallet P is positioned, and the lock-pin for the front-side holding part H1 is switched into an engagement-released-state. Next, a hanger frame 46 comes down, and a body B is moved downward. At the same time, an electric motor for moving operation of a movable body is actuated, so that the front-side article part X1 is moved forward once and moved backward again.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for positioning a front article section that includes a front suspension device and a rear article section that includes a rear suspension device. A jig pallet is provided which can be freely placed on the jig pallet, and a pallet conveying means is provided for conveying the jig pallet via a setting point between the two article parts and the body, and a pallet conveying means is provided to convey the jig pallet so that the body can be placed at the setting point. The present invention relates to a suspension part assembly apparatus for an automobile assembly line, which is provided with a body conveying means for conveying the body to the upper part of the body, moving it downward, and setting it on both of the article parts.

[Conventional technology]

The suspension assembly device in such an automobile assembly line is
The work is done by stopping the jig pallet on which both the front and rear side article parts are placed at the setting point, and setting it on both article parts as the body is moved down from the top of the setting point. will be made to do so.

Incidentally, after setting, the body and both article parts are tightened and fixed using bolts and nuts. The tightening and fixing work can be performed at the setting point, but in -a, a tightening and fixing point is provided on the downstream side in the conveyance direction than the setting point, and the setting is completed. The pallet of ingredients will be transported to the location where it will be tightened and fixed.

[Problem that the invention seeks to solve]

By the way, the wheelbases may differ depending on the vehicle type, and in order to deal with this, it is conceivable to form a plurality of types of jig pallets according to the differences in the wheelbases. In other words, it is conceivable to form a plurality of types of jig pallets on which front-side article parts and rear-side article parts are placed at different front-to-back intervals.

However, if a plurality of types of jig pallets are prepared in accordance with differences in wheel bases, a large number of jig pallets must be provided, which has the disadvantage of increasing equipment costs.

The present invention has been made in view of the above circumstances, and
The purpose is to make it possible to assemble items with different wheel bases using only one type of jig pallet.

[Means for solving problems]

The characteristic structure of the suspension part assembly apparatus for an automobile assembly line according to the present invention is that the front part and the rear part are mounted on a jig pallet that can be freely placed with the front part and the rear part being positioned. The holding part or the holding part for the front article part is provided on the jig pallet so as to be freely adjustable in position in the front-back direction, and its functions and effects are as follows.

[For production]

That is, by adjusting the position in the front-rear direction of the holding part for the rear side article part or the holding part for the front side article part in accordance with the difference in wheel base,
Different types of jig pallets can be used to assemble items with different wheelbases.

〔Effect of the invention〕

Therefore, since it is possible to assemble items with different wheel bases by simply preparing one type of jig pallet, it has become possible to reduce the cost of equipment.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

First, the automobile assembly line will be schematically explained based on FIG. 2.

The illustrated automobile assembly line consists of a main line (Ll) that uses an overhead conveyor device, a supply line (Ll) that includes a jig pallet (P), and an overhead conveyor device. A relay line (L3) is provided.

The body (B), which is currently being assembled, is placed on the main line (L).
The engine, suspension, passenger seat, tires, exhaust, etc. are assembled onto the body (B), and then delivered to the supply line (Ll) from a midway point in the supply line (Ll). The body (B) that has been attached is transferred to the main line (Ll) via the relay line (L3), and then the final body (8) is transferred to the main line (1+) again. Assembly is about to take place.

To further explain the supply line (Ll), the jig pallet (P) has a front article section (X1) that includes an engine and a front suspension device, and a rear article section that includes a rear suspension device. It is configured so that it can be placed freely with the side article part (x2) and the fuel tank, exhaust pipe, muffler, wiring, etc. (not shown) positioned, and of course, the jig pallet (P) can be placed on the line. It is equipped with a function to convey along the line.

Then, at the article supply point (K1), both the article sections (L
), (Xz), fuel tank, exhaust pipe, muffler, wiring, etc., are loaded onto the jig pallet (P), and then the jig pallet (P) is loaded.
P) is conveyed to the setting point (K2), the body (B) is set in both the article parts (L) and (Xi), and then the jig pallet (P) is transferred to the tightening point (K1). )
Then, use bolts and nuts to fix the set body (B) and both parts (Xυ, (XZ), fuel tank, exhaust pipe, muffler, wiring, etc.). It has become.

The following process will not be detailed, but the jig pallet
While transporting (P), the boarding seat, tires, etc. are assembled as described above.

Hereinafter, while explaining the structure of each part in detail, the two article parts (XI
), setting of (xz) and the body (B),
Also, both article parts (X1) are set.

The tightening and fixing of (x2) and the body (B) will be explained. Note that in illustrating both article parts (L) and (xz), suspension devices and the like are omitted as necessary.

In addition, the fuel tank, exhaust pipe, muffler, wiring, etc. and the body (
The setting and tightening fixing with B) are not shown in the drawings, but will be explained as necessary.

As shown in FIGS. 3 to 6, the jig pallet (
P) is basically formed into a ladder shape by assembling a pair of left and right vertical frames (1) and a plurality of horizontal frames (2) lined up in the front-back direction.

The front side portion of the jig pallet (P) is provided with a holding portion (Ill) for the front side article portion (xl), and the rear side portion of the pallet is provided with a rear side article portion (holding portion against (H2).

Of course, holding parts for the fuel tank, exhaust pipe, muffler, etc. will be provided at various locations on the jig pallet (P). That is, a holding part for each part is provided in accordance with the mounting location of each part, for example, a holding part for the fuel tank is provided in the front part of the holding part (l1g) on the rear side.

In addition, the jig pallet (P) is set at the setting point (K2
) and tightening points (K1), etc., and for this purpose, bottle retaining holes (3) are formed at the front and rear ends of the jig pallet (P). There is. Therefore, the setting point (KZ) and tightening point (K1
) etc., the lock bin (4) that engages and disengages from the bin engaging hole (3) is moved up and down by an air cylinder, as shown in FIGS. 7 and 8. It is provided.

Furthermore, holders for nuts (5
A) and a holder (5b) for bolts are provided so as to be movable up and down and rotatable around the vertical axis. These holders (5a) and (5b) are raised and rotated at the tightening point (K2) to connect the set body (B) and both article parts (Xυ).

(XZ), fuel tank, exhaust pipe, muffler, wiring, etc. Therefore, in the body (B),
Bolts and nuts corresponding to the nuts and bolts held in the holders (5a) and (5b) are attached, and the tightening point (K1) has a pair of front and rear bolts, as shown in Fig. 10. A holder scraping robot (6) is provided.

The holder operating robot (6) includes a base (6a);
On the other hand, there is a first arm (6b) which can be freely swung around the vertical axis by the actuator (+wυ), and a second arm (6C) which can be swung around the vertical axis by the actuator (m-). and actuator (13
), and the actuator (l14)
The operating part (6d) is engaged with the lower end of each holder (5a) and (5b), and the operating part (6d) is moved up and down with respect to the second arm (6c). 5a) and (5b) can be raised/lowered and rotated. Each robot (6) operates a plurality of holders (5a) and (5b) in a set order, and although not illustrated, a controller is provided to manage the operation of each robot (6). It will be done.

The robot (6) will also fix the fuel tank, exhaust pipe, muffler, and wiring, but if necessary,
Robots other than the illustrated robot (6) will also be provided.

The front side holding part (Hl) engages with a plurality of receivers (6) for receiving the base frame (F1) of the front side article part (xl) and the base frame (Fl) from below. A plurality of positioning pins (7) are used to position the article (Xυ) on the front side.
In addition, a plurality of engagement pins (7) are supported by columnar members (9) erected from a plate-shaped base material (8). In addition, each columnar member (9) is used for supporting the receiver (6) and the retaining pin (7), and the receiver is used for supporting the tool (6) and the engagement pin (7).
).

Further, the plate-shaped base material (8) is supported by a pair of left and right slide rails (10) so as to be movable back and forth, so that the front side holding part (H3) can be operated to change its position in the front and back direction. It looks like this.

However, in the figure, (11) is a stopper that comes into contact with the plate-shaped base material (8) in order to restrict the front-back movement range of the front side holding part (Hυ), and (12) is , is a lock pin that engages with the plate-shaped base material (8) from below in order to fix the front-side holding portion (Hl) in a predetermined position.

By the way, in this embodiment, the setting point (l
In h), the front holding part (Hl) is automatically operated to move back and forth, and the lock pin (12) is engaged and disengaged in connection with the back and forth movement. There is.

That is, as shown in Fig. 9, the setting point (K
g) is provided with a movable body (14) that can freely slide along a pair of left and right guide rails (13), and the movable body (14)
4) is provided with a pair of front and rear locking pieces (15), and these locking pieces (15) lock a locking piece (16) attached to the plate-shaped base material (8). It has become.

The movable body (14) is equipped with an electric motor (17) for movement operation.
) is provided with a top member (not shown) that fits into a screw shaft (18) driven by a screw shaft (18), and is slid back and forth by forward and reverse rotation of an electric motor (17).

The pair of locking pieces (15) can be switched between a locking state and a locking release state by vertically swinging around the horizontal axis, and are swung by one air cylinder (19). It is designed to be manipulated.

That is, the air cylinder (19) is connected to the pair of locking pieces (1
A pair of gears (20) are interlocked with one of the gears (5) and rotate integrally with each of the pair of locking pieces (15).

As shown in FIG. 4, the lock pin (12) is biased by a spring toward the locking side, and can be operated by a release lever (21) to switch to the counterfeit money release side. At the setting point (K2), there is an air cylinder (
22) is provided.

In addition, moving the front side holding part (IT) back and forth is as follows:
This is to avoid contact interference between the body side member and the front side article part (Xυ) when setting the body (B), and the details will be described later.

The rear holding part (H2), like the front holding part (Hl), holds the rear article part ("-X z
) and a plurality of retaining pins (24) for positioning that engage the base frame (F2) from below. It is designed to be placed with the side article part (x2) positioned. Then, the plurality of receivers (2
3) and a plurality of engagement pins (24) are connected to a plate-shaped base material (
25) using a columnar member (26).

The plurality of receivers (25) and the plurality of engagement pins (
24) is selectively used depending on the difference in drive format such as four-wheel drive or two-wheel drive, and the difference in steering format between two-wheel steering and four-wheel steering. Although the configuration for selection will not be described in detail, any one of the columnar members (26) is configured to be expandable and contractible, so that unnecessary items are evacuated to the lower side.

Moreover, the holder (5a) for the nuts and bolts illustrated above.
, (5b) that corresponds to the front article part (X1) is attached to the jig pallet (P) itself, whereas the bolt holder (5b) corresponding to the rear article part (L) is attached to the jig pallet (P) itself. 5b) is attached to the plate-shaped base material (25). Incidentally, the positions of the necessary holders (5b) attached to the plate-shaped base material (25) are adjusted according to the difference in the drive type and the difference in the steering type. .

Furthermore, the plate-shaped base material (25) has a retaining pin (26) that engages with the body (B) to be set from below.
A support bracket (27) and a support piece (28) for supporting and supporting the rear wheel are provided in series.

By the way, wheel bases may differ depending on the vehicle type, and therefore the rear side holding portion (H2) is attached to the jig pallet (P) so as to be freely adjustable in position in the front-rear direction.

That is, the plate-shaped base material (25) is supported by a pair of left and right slide rails (29) so as to be movable back and forth, and the member to be secured (30) on the pallet side is attached to the plate-shaped base material (25).
An engagement pin (31) that engages from above is provided in the member to be engaged (30), and two engagement holes are formed in the front and rear of the member to be engaged (30). The rear holding part (11□) can be adjusted to two positions, front and rear, while engaging and disengaging.

The engagement pin (31) is elastically biased downward, that is, toward the engagement side, and is brought into a disengaged state by being pulled against the biasing force.

As shown in Fig. 1 and Fig. 5, the roller conveyor device extending over the entire length of the supply line (L) and the jig pallet (
A moving body (A) for locking and moving P) is provided to constitute a pallet conveying means.

The roller conveyor device includes a pair of left and right conveyance sections (D), each of which includes a receiving roller (32) that rotates around the horizontal axis and a roller that rotates around the vertical axis. A lateral movement regulating roller (33) that rotates at 30° is provided. Therefore, the jig pallet (P) can move along the line while its left and right ends are received and guided by the rollers (32) and (33).

However, (34) in the figure is an inverted U-shaped conveyor frame that is opened and erected at appropriate intervals along the longitudinal direction of the line. Incidentally, this conveyor frame (34) will also be used as a base on which other various devices are attached.

As shown in FIGS. 11 and 12, the moving body (A) travels along a guide (35) having a square-shaped vertical cross section, and has a front part of the vehicle body and a rear part of the vehicle body. To each of the
It is equipped with a pair of left and right running wheels (36) and eight anti-sway rollers (37), and the pair of left and right running wheels (36) at the front of the vehicle body are driven by an electric motor (not shown). ,
It's set to progress.

Moreover, a pair of locking pieces (38) for locking the pallet are provided on the upper part of the moving body (A). These locking pieces (38
) is pivotably supported to be able to swing up and down, and locks the jig pallet (P) as it swings upward and releases the lock as it swings downward. It has become. Although not described in detail, the swinging operation of the pair of locking pieces (38) is performed using a cam member that is slid by an electric motor.

A power supply rail (39) for supplying power and transmitting and receiving control signals is attached to the side surface of the guide (35), and a current collector (4o) is attached to the movable body (A). There is. In addition, a rack (41) is placed on the top surface of the guide (35).
is attached to the movable body (A), and the movable body (A) includes a pinion (42) that engages with the rough (41), and a rotary echo radar (not shown) that detects the amount of rotation of the pinion (42), although not illustrated. are provided so that the traveling speed and traveling distance of the moving body (A) can be detected.

By the way, the above-mentioned mobile bodies (A) are distributed at various locations in the supply line (L2), and a plurality of mobile bodies (
A) is designed to transport jig pallets (P) in sequence. That is, each moving body (A) is controlled to reciprocate in a predetermined section, and in detail, the jig pallet (P
) is stopped and conveyed, and then returns to the starting end of the section.

In addition, moving bodies (A) adjacent to each other in the longitudinal direction of the line are
They are arranged at different positions in the width direction of the line so that one side locks the left side of the jig pallet (P) and the other locks the right side of the jig pallet (P). This prevents adjacent moving objects (A) from interfering with each other.

As shown in FIG. 1, bodies (B) supplied to the supply line from a midway point on the main line (M) are transferred to the setting point (K2) by a body conveying means (G) described below. After being conveyed to the upper part, the two article parts (X + ) are moved downward.

(Xz), fuel tanks, exhaust pipes, mufflers, wiring, etc. However, the body (B
), the front side article part (xl
) is moved back and forth with respect to the tool pallet (P) to avoid abutting interference between the body side member and the front side article part (Xl).

Note that (43) in the figure is a relay moving body that conveys the body (B) supplied from the main line (Ll) to the starting end of the body conveyance means (G), and is a moving body that is connected to the guide (44). It is designed to run back and forth along the line.

As shown in FIGS. 13 and 14, the body conveyance means (G) includes a pair of left and right guide rails (45) on the upper side.
It has a so-called overhead type structure, with a carrier that travels in a suspended state along the road.

The carrier is equipped with a pair of left and right square hanger frames (46), and a body locking frame (47) is provided at the front and rear ends of the hanger frames (46) to swing in and out about the vertical axis. It is pivoted for free movement. In addition, the body locking frame (
47) is designed to be swung by an air cylinder.

The carrier also includes a pinion (49) driven by a propulsion electric motor (48), and the pinion (49) is attached to a rack (50) installed along the guide rail (45). It is designed to run when engaged.

Each of the left and right hanger frames (46) is supported by a support part (51) on the carrier main body side so as to be able to slide up and down, and a rack (52) is provided on the vertical frame portion of each hanger frame (46). ) is formed. The pinion (5) meshes with the rack (52).
3) is provided on the support portion (51), and by driving and rotating the pinion (53) in forward and reverse directions, the left and right hanger frames (46) are raised and lowered.

The four pinions (53) are connected to one elevating electric motor (54), as schematically shown in FIG.
It is designed to be driven by

That is, a pair of front and rear pinions (53) on the left side and a pair of front and rear pinions (53) on the right side are connected to rotate together by a transmission shaft (55), and these left and right transmission shafts (
The drive shaft (56) is connected to each of the drive shafts (55) by bevel gears.
), and its drive shaft (56) is gear-coupled with the electric motor (54) for lifting and lowering.

In addition, (57) in the figure is a holder for steadying the hanger frame (46), and is configured to be freely engageable and detachable from a retaining pin (58) provided at the lower end of the hanger frame (46). At the same time, it is supported so as to be able to rise and fall freely along the guide (59) on the ground side, and furthermore, although not illustrated, when pushed by an air cylinder with a force greater than the window, it is returned to the upper side in a descending state. It is now possible to do so.

Next, regarding the procedure for setting the body (B), we will mainly explain the steps in Figures 1 and 16 (A), (II), and (C).
Add explanation while referring to. However, in the illustrative drawings, the case where the stabilizer (a) and piping (b) on the body side come into contact with and interfere with the engine of the article part (xl) on the front side is described as an example.

First, the jig pallet (P) on which the front and rear parts (L), (Xz), fuel tank, exhaust pipe, muffler, wiring, etc. are placed is transported to the setting location (L). In addition, the carrier supporting the body (B) is transported to the upper part of the setting point (Kg).

Then, the jig pallet (P) is placed at the setting location (K2
), a lock bin for positioning the pallet (
4) to the engaged state, the pair of locking pieces (15) of the movable body (14) to the locking state, and the lock bin (
12) is switched to a decoupled state.

Next, the electric motor (
54) is actuated to move the body (B) downward.

Then, as the body (B) moves downward, the movable body (1
The electric motor (17) for the movement operation of 4) is activated,
After the article part (X1) on the front side is moved to the front side, it is moved to the rear side again.

Note that the forward and backward movement of the movable body (14) accompanying the descent of the body (B) is performed by setting in advance the target position of the movable body (14) relative to the amount of descent of the body (B). Specifically, as shown in FIG. 17, a rotary encoder (
54a) and the electric motor (17) for movement operation.
) is input to a control device (60) using a microcomputer.

The control device (60) controls the operation of the electric motor (17) for movement operation based on pre-stored information and input detection information.

By the way, when the setting is completed, the body locking frame (47) on the carrier side is operated to retire, and the carrier returns to its original position.
After the lock bin (12) is switched to the locked state, the pair of locking pieces (15) of the movable body (14) are switched to the unlocked state. After completing those operations, the jig pallet (P) is moved by the moving body (A).
will be transported to the tightening point (K1).

[Another example]

In the above-mentioned embodiment, the position of the holding part (lh) for the rear article part (X2) is adjusted in the front-rear direction in accordance with the difference in wheelbase, but the holding part for the front article part (Xl) is adjusted in the front-rear direction. (II 1 ) may be adjusted in position in the front-rear direction.

However, as in the above embodiment, the front side holding part (Hυ
- In this case, it is better to adjust the position of the holding part (H) on the rear side in the front-rear direction, regardless of the difference in wheel base. The holding portion (■υ) may be appropriately operated back and forth using the movable body (14).

In carrying out the present invention, lower vehicle parts other than the various parts described in the above-described embodiments may be held on a jig pallet (P), and these may also be assembled to the body (B). Furthermore, the present invention is applicable not only to front engine types but also to mid engine types and rear engine types.

In carrying out the present invention, the specific configuration of the jig pallet (P),
The configuration of each part, such as the specific configuration of the pallet conveyance means (A, D) and the body conveyance means (G), can be changed in various ways depending on the intended use.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the underbody assembly apparatus for an automobile assembly line according to the present invention, in which FIG. 1 is a schematic side view of the underbody assembly location, FIG. 2 is a schematic plan view of the automobile assembly line, and FIG. The figure is a plan view of the jig pallet, Figure 4 is a partially cutaway side view of the jig pallet, Figure 5 is a cutaway front view of the front holding part, and Figure 6 is a cutout of the rear holding part. Figure 7 is a cutout rear view, Figure 7 is a plan view of the undercarriage assembly location, Figure 8 is a cutout side view of the same location, Figure 9 is a side view showing the longitudinal movement operation structure, Figure 1O is a jig pallet. 11 is a partially cutaway side view of the moving body; FIG. 12 is a front view of the moving body; FIG. 13 is a front view of the body conveyance means;
The figure is a side view of the means, Figure 15 is a schematic plan view showing the transmission system, Figures 16 ((), (El), and (c) are schematic side views of the setting operation, and Figure 17 is a block diagram. Yes. (A, D)...Pallet transport means, (B)...
...Body, (G) ...Body conveyance means,
(■υ...Holding part, (8)...Jig pallet, (X+)...Front side article part, (
X2)...Rear side goods section.

Claims (1)

[Claims] Front side article section (with front undercarriage device)
A jig pallet (P) is provided on which a jig pallet (P) can be freely placed with positioning the rear article section (X_1) and the rear article section (X_2) equipped with a rear suspension device, and
A pallet conveying means (A, D) is provided for conveying the jig pallet (P) via the setting point between the body (B) and the body (B), and the body (B) is placed above the setting point. An apparatus for assembling a suspension portion of an automobile assembly line, which is provided with a body conveying means (G) for conveying and moving downward to set the article parts (X_1) and (X_2), wherein the jig is Holding part (H_2) for the article part (X_2) on the rear side of the pallet (P)
) or a suspension part assembly apparatus for an automobile assembly line, in which a holding part (H_1) for the front side article part (X_1) is provided on the jig pallet (P) so as to be freely adjustable in position in the front-rear direction.