JP3095953B2 - Workbench for assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workbench for an operator who assembles various components on an assembly target in a component assembly line of the assembly target.

[0002]

2. Description of the Related Art In order to assemble various parts on the body of an automobile, in an assembly line in which the body of an automobile is mounted on a carrier and transported at a predetermined speed by a conveyor, a part of the assembly line is located on a side of the assembly line. A work carriage that moves a fixed distance in the same direction and at the same speed as the transfer carriage is installed on the floor surface, a parts shelf is placed on the work carriage, and a worker rides and performs assembly work of parts. .

A slat conveyor for assembling work in which a U-shaped slat plate having an upper stage on which a vehicle body is placed and a lower stage on which an operator stands is circulated by a chain is disclosed in Japanese Utility Model Publication No. 56-162210. ing.

[0004]

In the case of the work cart,
Each time the work vehicle moves to a certain distance and returns from the moving end to the original position, the worker has to troublesomely get off the work vehicle and evacuate until the work vehicle passes, which reduces work efficiency. I have.

In Japanese Utility Model Application Laid-Open No. Sho 56-162210, a component shelf cannot be placed on a U-shaped slat plate on the lower side where a worker stands, and the component shelf is placed on the floor behind the worker. This means that the worker is placed in a rearward position to receive parts from the fixed parts shelf, which is not good for the body. Further, the conveyor structure has a U-shaped slat plate with two U-shaped upper and lower tiers over the entire transport distance of the vehicle body.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a component assembling rail is provided on a floor surface on a side of a component assembling line on which an object to be assembled is transported .
A belt conveyor for circular movement in parallel with the floor surface in the conveying direction of the object to be assembled unit along in, the belt conveyor
And stool of juxtaposed <br/> fixed along the conveyor belt at A top flush, and a traveling path of the parts moving carriage that travels the belt conveyor and synchronously along the stool of the fixed arrangement, wherein Synchronized interlock with the belt conveyor for the parts moving trolley
Drive transmission that is inserted and removed between pitches of
And an axis parallel to the pin via a connecting member
Attached to the operating shaft connected by
Pull out the pin from the chain pitch at the moving end.
Cam follower that comes into contact with the cam
A pin engaging / disengaging device comprising locking means for the pin.
It is a sign.

[0007]

With the above arrangement, the worker performs the work of assembling the parts while moving on the belt conveyor together with the transport of the body to be assembled, and the parts to be assembled are reachable by the worker, and The parts can be easily received from the parts moving trolley moving at the same speed as the movement of the worker, and after the parts are assembled, the worker returns to the original position through the central step.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an assembly object (for example, an automobile body).
Is a component assembling line to be conveyed, and is composed of a chain 2 and an assembling body 3 (for example, an automobile body) moved by the chain 2.

Reference numeral 4 denotes an assembly work table according to the present invention. The assembling work table 4 is provided on the floor surface on the side of the component assembling line 1 along the component assembling line 1 from the component assembling line 1 side in the transport direction of the to-be-attached object, that is, the chain. Conveyor belt 5 that circulates parallel to the floor in the direction of movement 2
, A stationary platform 6, and a component moving vehicle 8 that runs synchronously with the belt conveyor 5.

As shown in FIG. 2, the synchronous traveling drive mechanism of the belt conveyor 5 and the parts moving cart 8 is installed in a pit below the floor, in which the belt conveyor 5 is wound around rollers 9 supported by bearings 10. Motor 11 with reduction gear 12
The sprocket 13 and the sprocket 14 fixed to one end of the roller 9 are rotationally transmitted by a chain 15,
This is a structure in which a sprocket 16 on which the chain 7 arranged on the traveling route of the parts moving cart 8 is stretched and a sprocket 14 on the roller 9 side are connected by a connection shaft 17 passing through the lower surface of the step platform 6.

As shown in FIGS. 2 to 4, the component moving cart 8 is guided on a guide rail 18 so as to be able to travel by three-point support of an upper roller 19a, a lower roller 19b and a side roller 19c.

Further, the chain 7 is attached to the parts moving trolley 8.
And an engagement / disengagement device 21 is provided. This disengaging device 21
As shown in FIG. 4, a support block 22 is fixedly mounted on the rear surface of the component moving carriage 8, and three guide sleeves 23a, 23b, and 23c in the vertical axis direction are fitted to the support block 22 in a row. doing.

As shown in FIG. 5, a drive transmission pin 24 which is inserted and removed between the pitches of the chain 7 is vertically movably fitted in the center guide sleeve 23a. Also, on the left guide sleeve 23b,
An operating shaft 25 having a cam follower 33 attached to its lower end is movably fitted in the up-down direction, and the right guide sleeve 23
A guide shaft 26 is inserted into c so as to be movable in the vertical direction, and the pin 24, the operating shaft 25 and the guide shaft 26 are integrally connected by a connecting member 27.

The pin 24 has a handle 30 at its upper part, and an annular groove 28 is formed on the outer peripheral surface inside the guide sleeve 23a.
Is provided. The support block 22 is provided with a pin locking member 2 which is engaged with the annular groove 28 in order to lock the pin 24 lifted upward and pulled out of the chain 7.
9 are attached. The pin locking member 29 is suitably of a plunger type in which a shaft or a ball pressed by a spring is engaged with or disengaged from the annular groove 28.

On the other hand, a means for automatically pulling out the pin 24 from the chain 7 is provided at the forward running end of the component moving cart 8. As shown in FIGS. 3 and 4, as shown in FIGS. 3 and 4, a mountain-shaped cam 34 abutting a cam follower 33 at the lower end of the operating shaft 25 is fixed on the bracket 31, and as the cam follower 33 moves to the top of the cam 31. The structure is such that the operating shaft 25 is raised, the pin 24 is lifted up through the connecting member 27 to be pulled out of the chain 7, and the chain 7 and the parts moving cart 8 are separated and free. Reference numeral 32 denotes a chain guide plate, which prevents the chain 7 from sagging and ensures that the pin 24 is removed from the chain 7.

Since the present invention has the above-described structure, the belt conveyor 5 and the chain 7 for moving the component moving cart 8 are synchronously moved in the same direction and at the same speed as the moving speed of the chain 2 of the component assembling line 1. I do. In addition, the pin 24 is removed from the chain 7 by the completion of the previous assembly of the parts moving cart 8, and the part moving cart 8 is returned to the original position at the left end in FIG. A parts box 20 in which parts are stored is placed on the upper part.

Therefore, when assembling parts to the body 3 to be assembled (for example, an automobile body) on the chain 2, the operator grasps the pin 24 of the parts moving cart 8 which has been returned to the original position at the left end in FIG. By pushing down 30, it is inserted between the pitches of the chain 7, and the parts moving cart 8 starts moving forward at the same speed as the belt conveyor 5.

At the same time, the worker rides on the conveyor belt 5, receives the parts from the moving parts box 20, and performs the work of assembling the parts while moving along with the transport of the body to be mounted.
Component assembly is completed by the front end of the belt conveyor 5 in the forward movement.

On the other hand, the component moving trolley 8, which is synchronously moving forward with the belt conveyor 5, has the cam follower 33 abutting on the bottom of the cam 31 from the vicinity of the front end of the forward moving and rolling up the ascending gradient gradually, and the component moving trolley 8 rolls up. The movable carriage 8 reaches the top at the front end of the forward movement. As a result, the operating shaft 25 rises and the connecting member 2
The pin 24 is lifted through the chain 7 to be pulled out of the chain 7, and the chain 7 and the component moving vehicle 8 are separated to stop the forward movement of the component moving vehicle 8 and become free. The lifted pin 24 is a pin lock 2 that engages with the annular groove 28.
9 to maintain the lifting state.

Then, the worker descends from the belt conveyor 5 to the step 6 for the next assembling operation, and returns to the original position using the step 6 as a passage. At the time of this return, the original position return is performed by manually pushing the parts moving cart 8 in the free state.

As shown in FIG. 1, the length L of the assembling worktable 4 is defined as a unit within a certain moving distance range of the to-be-assembled body 3 (for example, an automobile body). Can be used in series, and the body to be assembled is not limited to an automobile body, but can be applied to the assembly of a machine tool or the like.

[0022]

As described above, according to the present invention, the assembled
Attached along the side of the component assembly line where the attachment is transported
A belt conveyor that moves at the same speed and in the same direction as the body
Fixed steps alongside the belt conveyor
Parts that run synchronously with the belt conveyor along the steps
Since the configuration is such that the traveling route of the mobile trolley is arranged, parts
When assembling, the body to be assembled and the belt con
All workers on the bear and the parts moving trolley move at the same speed and in the same direction.
The operator moves the parts from receiving parts to the
The assembling work can be performed easily and efficiently.
In addition, the worker starts the assembly work end from the belt conveyor.
Transfer to a fixed platform adjacent to
It is possible to return to the original position, at which time the
Part that is automatically stopped by the lock release device and is in a free state
The product moving trolley walks on a fixed step and returns the worker to the original position.
It is safe to return to the original position by using the operation
Return of the original parts moving trolley and the next parts
The assembly work cycle can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a side view of a forward end portion of the component moving trolley in the forward movement.

FIG. 4 is a BB line diagram of FIG. 3;

FIG. 5 is a sectional view taken along line CC of FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 parts assembling line 2 chain 3 body to be assembled (for example, car body) 4 assembling work table 5 belt conveyor 6 step 7 chain 8 parts moving trolley 11 motor 17 connecting shaft 20 parts box 21 disengagement device 24 pin 25 operation Shaft 27 Connecting member 28 Annular groove 29 Pin stopper 30 Handle 33 Cam follower 34 Cam

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁷ identification code FI B23P 21/00 307 B23P 21/00 307P B62D 65/18 B62D 65/18 C (58) Fields surveyed (Int.Cl. ⁷ , (DB name) B23H 1 / 00,5 / 00 B23P 21/00 B62D 65/18

Claims (1)

(57) [Claims] 1. An assembly according to claim 1 , wherein said assembly is carried along a component assembly line on a floor side of said component assembly line to which said assembly is transported .
A belt conveyor that circulates in parallel with the floor in the direction of conveyance, and a belt that is flush with the upper surface of the belt conveyor.
A fixed platform that is arranged along the conveyor and this fixed platform
A traveling path of the parts moving carriage that travels the belt conveyor and synchronously positioned along the stool, the component moving carriage, in conjunction with the belt conveyor synchronously
For drive transmission to be inserted and removed between pitches of a chain that moves around
And an axis parallel to the pin via a connecting member.
Movement of the component moving trolley attached to the connected operating shaft
At the end, pull out the pin from between the pitches of the chain
Between the cam follower and the pin
An assembling workbench comprising a pin engaging and disengaging device comprising a locking means .