JPS62806B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a
The present invention relates to a transport device whose main purpose is to transport objects.

Conventionally, at work sites where workpieces, such as automobiles, are assembled in an automated manner, roller conveyors are used to transport the object, that is, the automobile body, one step at a time, and assemble the parts one after another. When moving from the current process to the next process, the entire conveyance device was raised and then lowered again to place the object to be conveyed (automobile body) on the jig. Since the entire conveying device is moved up and down, not only does the energy loss required for the up and down movement become large, but the structure is complicated, requiring high precision machining and requiring a lot of assembly man-hours. Moreover, since the vertical movement of the conveyance device and the conveyance are integrated, if the conveyance device breaks down, the entire line may stop and production may be hindered.

The present invention has been made in view of the above-mentioned problems of the conventional art, and has been made in order to solve these problems.The present invention is capable of carrying out the conveyance and vertical movement of the conveyed object separately using independent devices, and has a simple structure. The purpose of this invention is to provide a conveying device that can be easily operated.

The present invention will be described below with reference to illustrative embodiments.

A is a transport device that transports a transported object B such as an automobile body, and includes a transport mechanism a that transports the transported object B step by step, and a transport mechanism a that transports the transported object B on and off a jig (not shown). It consists of a lift device b.

The transport mechanism a is mainly composed of a shuttle bar 11 and fingers 12 which are provided on the shuttle bar 11 at appropriate intervals so as to be able to rise and fall freely, and on the lower surface of the shuttle bar 11 there are provided the fingers 12 for transporting the object B for one step. A sufficient drive transmission member 13 is provided, and stoppers 14 are provided at the front and rear ends of the rack gear 13. Further, the finger 12 has a first link 15, a second link 16, and a third link.
The first link 15 and the second link 16 are pivotably connected to each other at substantially the center, and the upper end of the third link 17 is connected to the first link 17.
is rotatably attached to the lower end of the link 15, and
The lower ends of the second link 16 and the third link 17 are respectively pivotally connected to the shuttle bar 11, and
Further, near the lower end of the second link 16 is the connecting rod 1
9, and the connecting rods 19 are arranged at appropriate intervals and can be moved back and forth to the shuttle bar 11 via a plurality of links 18, which are rotatably connected. installed. Therefore, by raising and lowering the connecting rod 19, that is, moving it back and forth, each of the links 15, 1
6 and 17 rotate around their respective pivots,
Finger 12 is raised and lowered. Reference numeral 20 denotes a bracket rotatably attached to the tip of the first link 15.

Reference numeral 21 denotes an operating lever for operating the connecting rod 19, the tip of which has a substantially triangular shape;
The central apex of the triangular shape is rotatably attached to the tip of the shuttle bar 11, and the other end of a coil spring 22, one end of which is fixed near the tip of the shuttle bar 11, is fixed to the upper corner. One end of a substantially crank-shaped link 23 is rotatably attached to the lower corner.
The other end of the link 23 is rotatably attached to the tip of the connecting rod 19, and the link 23, the operating lever 21, and the coil spring 22 constitute an operating member. With the above configuration, when the finger 12 is in the upright state, the operating lever 21 is in the position shown by the solid line in _FIG .
Since the position is above the imaginary line L connecting the fixed part P on the shuttle bar 11 side of No. 2 and the pivot point P' of the operating lever 21, the operating lever 21 attempts to rotate in the X direction due to the spring force of the coil spring 22. However, since the link 23 comes into contact with the stopper piece 24 fixed to the operating lever 21 and prevents the rotation,
The operating lever 21 is held at this position, and therefore the finger 12 is also held in its upright state. Furthermore, when the finger 12 is in the laid down state, the operating lever ₂₁ is at the position indicated by the chain line shown in FIG. is biased by the spring force of the coil spring 22 and Y
However, the link 23 comes into contact with the locking pin 25 of the fixed part P and prevents the rotation, so the operating lever 21 is held at this position, and therefore the finger 12 The inverted state is also maintained.

The transport mechanism a configured as described above is installed to be slidable in the front-rear direction on pillars 27 that are erected on a floor 26 of an assembly factory or the like at appropriate intervals. A drive device c having a reduction gear 28 that meshes with the rack gear 13 is provided on the floor surface 26 at a position corresponding to the rack gear 13 provided in the transport mechanism a. 29 is a stopper provided on both sides of the drive device c, 30 is a shock absorber, and 31 is a shuttle lock. Incidentally, when the number of conveying processes is two or less, the shuttle bar 11 can be fixed only by the braking force generated by stopping the drive device c, so the shuttle lock 31 can be omitted. The driving device c is configured to rotate forward and backward one step at a time, and its operation is performed by the movement of the operating lever 21 and the action of a limit switch (not shown). The forward and backward positions of the shuttle bar 11, where the operating lever 21 on the floor 26 is located at the start and end of one stroke, respectively serve as a lifting air cylinder 32 serving as a finger raising drive device and a finger lowering drive device. A lowering air cylinder 33 is provided. The ascending air cylinder 32 and the descending air cylinder 33 each come into contact with the operating lever 21, and as the air cylinders 32 and 33 expand and contract, the operating lever 21 is rotated, and the connecting rod 19 is moved forward or backward. This allows the fingers 12 to be raised and lowered. Note that the above-mentioned ascending air cylinder 32 and descending air cylinder 33 are shown as an example in which the operating lever 21 is operated, and the method is not limited to this, and any method may be used as long as it can be operated manually or electrically. The method is not limited.

A roller conveyor 34 serving as a conveyor on which the transported object B is slidably placed is disposed in parallel at a symmetrical position of the transport mechanism a, and the roller conveyor 34 is arranged in parallel so as to correspond to the transported object B. Lift roller conveyor 34 that is divided into multiple parts and can move vertically
a, and a fixed roller conveyor 34b that connects the lift roller conveyor 34a, and the lift roller conveyor 34a is moved up and down by a lift arm 35 serving as a lift device b operated by an air cylinder (not shown). It is made to move. In addition, the lift roller conveyor 34
a is the fixed roller conveyor 34 when rising.
When it becomes flush with the fixed roller conveyor 34b, a conveyor locking device (not shown) is activated to lock it so that it remains flush with the fixed roller conveyor 34b. Note that in this embodiment, the transported object B
Although the roller conveyor 34 is used as the conveyor on which the objects are slidably placed, it is not limited to the roller conveyor 34, and other types of conveyors may be used, or a guide rail type conveyor may be used. 36 is the transported object B
This is a workpiece that is placed on a roller conveyor 34 and moved on a roller conveyor 34.

Next, the operation and operation sequence of the conveyed object A according to the present invention will be explained.
4a is raised so that it is flush with the fixed roller conveyor 34b. Above roller conveyor 3
4 are in the same plane, a conveyor locking device (not shown) operates to fix and hold the same plane.
After confirming that the roller conveyor 34 is fixed and held, the lifting air cylinder 32 is activated and the operating lever 21 is moved to raise the finger 12 and engage it with the workpiece 36. Finger 1 above
2 is engaged with the workpiece 36, a limit switch (not shown) is activated, the shuttle lock 31 is released, the drive device c is activated, and the reduction gear 28 begins to rotate in the forward direction. Due to the forward rotation, the rotational force is transferred to the rack gear. 13, the shuttle bar 11 moves forward, and the transported object B is transported. When the shuttle bar 11 moves one step and the stopper 14 provided at the rear end of the rack gear 13 comes into contact with one stopper 29 provided on the drive device c, it is decelerated by one shock absorber 30 and stops at a predetermined position. ,
The shuttle lock 31 works to keep it fixed at this position. Next, when the lowering air cylinder 33 is activated to lower the finger 12, a limit switch (not shown) is activated, the shuttle lock 31 is released again, the drive device c is activated, and the reduction gear 2
8 is reversed, and the shuttle bar 11 retreats and returns to its original position. At this time, the stopper 14 provided at the front end of the rack gear 13 comes into contact with the other stopper 29 of the drive device c, and the same effect as in the above-described forward movement occurs to keep the gear fixed. After that, the roller conveyor 34
the lift roller conveyor 34.
A is lowered and the conveyed object B is placed on a jig (not shown), completing the assembly work preparation for the next process.

As described above, according to the present invention, in a conveyance device installed at a workpiece assembly site for conveying a conveyed object, the lifting and lowering process of the conveyed object and the conveying process are performed separately using independent devices. As a result, there is no need to move the lifter for a relatively heavy load, and since the shuttle and fingers do not support the load of the transported object, it is advantageous in terms of strength. Since the number of parts is small and precision is not required, not only the number of assembly steps is reduced, but there are also fewer failures and it can be provided at low cost.

Further, according to the present invention, the lifting and lowering of the conveyed object and the conveyance are performed using separate devices, and the conveyed object is conveyed at a constant level without being raised or lowered. Also, since the lifter operates, the objects to be transported can be transported manually, so there is no problem with production.

Further, according to the present invention, the finger can be operated simultaneously in all processes by means of the actuating member and the connecting rod, so that the work efficiency can be improved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conveying device according to the present invention;
FIG. 2 is a partially enlarged side view showing the operating state of the finger and the operating lever, and FIG. 3 is a partially enlarged side view showing the relationship between the rack gear and the drive device. A is a transport device, a is a transport mechanism, b is a lift device, c is a drive device, 11 is a shuttle bar, 12 is a finger, 13 is a rack gear, 19 is a connecting rod, 21 is an operating lever, 28 is a reduction gear, 3
4 is a roller conveyor, and B is a conveyed object.

Claims (1)

[Claims] 1. A conveyor is provided on which objects to be transported are slidably placed, and the conveyor is provided with a lift device that moves the conveyor up and down, and the lift device lifts the objects to be transported when the conveyor is raised. The conveyor is configured to be lifted up from the jig and placed on the jig when descending, and a conveyance mechanism is provided near the conveyor to convey the conveyed article placed on the conveyor. , the conveying mechanism includes a shuttle bar arranged in parallel with the conveyor, a connecting rod arranged in parallel with the shuttle bar and supported by the shuttle bar so as to be movable back and forth, and a connecting rod rotatably connected to the shuttle bar. a finger rotatably connected to the connecting rod and movable up and down on the shuttle bar by movement of the connecting rod; a drive device that moves the shuttle bar forward and backward via a drive transmission member provided on the shuttle bar; An actuating member for moving the rod back and forth is provided, the shuttle bar is slidably supported on the support, the fingers engage with the conveyed object when standing up, and are disengaged when falling down; The member is rotatably connected to the shuttle bar and rotatably connected to the connecting rod, and further includes a finger lowering drive device and a finger lifting device provided at the forward and backward positions of the shuttle bar, respectively. A conveyance device characterized in that it is driven by a drive device. 2 The finger is composed of three links, the first link and the second link are rotatably intersectingly connected approximately at the center, and the upper end of the third link is connected to the first link.
The second
The lower end of the link and the lower end of the third link are rotatably connected to the shuttle bar, and the vicinity of the lower end of the second link is rotatably connected to a connecting rod, and the connecting rod is rotatably connected to the shuttle bar. It is attached to the shuttle bar so as to be movable back and forth through a rotatably pivoted link, and as the connecting rod moves back and forth, the fingers are raised and lowered, and when transporting objects, the fingers are raised and lowered. raising the finger to engage the conveyed object;
2. The conveyance device according to claim 1, wherein the finger is made to lie down upon return. 3. The actuating member has a triangular center top portion of an operation lever having a substantially triangular tip end rotatably attached to the tip end of the shuttle bar, and one end of the actuating member is attached to the top corner of the operating lever. The other end of the coil spring fixed nearby is fixed,
One end of a substantially crank-shaped link is rotatably attached to the lower corner, and the other end of the link is rotatably attached to the tip of the connecting rod. A conveying device according to any one of claims 1 to 2, characterized in that: