JP3219225B2 - Work transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer device for transferring a work across a plurality of processes.

[0002]

2. Description of the Related Art When a workpiece is processed through a plurality of steps, for example, three steps, usually, processing stations for performing each processing are arranged at an equal pitch, and a work holding means such as a hanger is mounted on the work station.
With the transfer device provided, the works in the first and second processing stations are simultaneously sent to the next processing station.

[0003] However, after the worker sets the work at the first working station, the work is performed, the next work is performed at the second working station, and the worker takes out the work at the third working station. In the case where the work is transported over a hanger or the like, the first hanger is separated from the first processing station when setting the work in the first processing station, and the work is taken out when the work is taken out in the third processing station for the safety of the operator. It is required that the second hanger be kept away from the third processing station.

Therefore, in such a work, as shown in FIG. 5, the pitch (P1) between the first hanger (2) and the second hanger (3) for holding the work (1) of the work transfer device is changed to the first. 2 The pitch (P2) between the first processing station (A) and the second processing station (B) is adjusted to match the pitch (P3) between the processing station (B) and the third processing station (C). Set longer than the pitch (P3) between the station (B) and the third processing station (C),
When the second hanger (3) comes over the second processing station (B), the first hanger (2) is located at a position away from the first processing station (A).

In the work transfer device, a slide block (6) is slidably provided on a guide rail (5) installed along a transfer direction on a gantry (4), and a first block attached to the slide block (6). The first hanger (2) and the second hanger (3) for holding the work (1) are supported on the support block (8) and the second support block (9) by the guide rod (7) so as to be able to move up and down. 6) The first hanger (2) and the second hanger (3) are raised and lowered by the first lifting cylinder (10) and the second lifting cylinder (11) provided above.

The slide block (6) is slid via a multi-speed mechanism (13) by a transfer cylinder (12) provided on a gantry (4) and performing a multi-stage operation. Double speed mechanism (1
3) includes a pair of racks (14a) (14b) and one pinion gear (15) meshing with the pair of racks (14a) (14b). The fixed rack (14a) is fixed to the gantry (4), and the movable rack (14b) is fixed. Mounted on the lower surface of the slide block (6), the pinion (15) is moved back and forth by the transfer cylinder (12) to move the movable rack (14b) at double speed to move the slide block (6) back and forth. Move.

When the work is set, as shown in FIG. 7, the transfer device makes the second hanger (3) stand by above the second processing station (B) and places the first hanger (2) in the first processing station. (A) Stand by at a position distant from. Workpiece is jig (not shown) at the first processing station (A)
When the predetermined processing is completed, the transfer cylinder (12) extends to move the first hanger (2) to the first processing station (A), and then to the first lifting cylinder (10). To raise and lower the first hanger (2),
The work (1) is grasped by the hanger (2) and taken out.

Next, the transfer cylinder (12) is slightly shortened to move the second hanger (3) to the second processing station (B).
When the second hanger (3) is moved upward and the processing of the second processing station (B) is completed, the second hanger (3) is raised and lowered by the second lifting cylinder (11), and the workpiece (1) is moved by the second hanger (3). Grab and take out.

When the first and second hangers (2) and (3) grasp and take out the work (1), the transfer cylinder (12) performs a shortening operation to move the first hanger (2) and the second hanger (3). The second processing station (B) and the third processing station, respectively.
The first hanger (2) and the second hanger (3) are moved up and down, and the gripped workpieces (1) and (1) are moved to the second processing station (B) and the second hanger (2). 3 Transfer to the jig of the processing station (C).

Thereafter, the transfer cylinder (12) extends to return the second hanger (3) to the second processing station (B). When the second hanger (3) moves away from the third processing station (C), the worker takes out the work (1) at the third processing station (C). On the other hand, in the first processing station (A), when the first hanger (2) moves forward, the work (1) is set and processing is performed.

[0011]

SUMMARY OF THE INVENTION In a conventional transfer device,
Since the pitch between the first hanger (2) and the second hanger (3) is fixed, the first hanger (2) is moved to the first processing station (A) and moved from the first processing station (A). When the work (1) is taken out, the second hanger (3) is separated from the second processing station (B), and even if the work at the second processing station (B) is completed, the second hanger (3). Cannot be taken out by raising and lowering the work (1). Therefore, after removing the work (1) from the first processing station (A), the second hanger (3) is moved to the second processing station (B),
The work (1) of the second processing station (B) is taken out by the second hanger (3).

As described above, since the workpieces (1) cannot be taken out simultaneously at the first working station (A) and the second working station (B) and one work piece (1) is taken out at a time, there is a standby in taking out one work (1). The time was long and the cycle time was very long.

In order to shorten the cycle time without increasing the number of steps, the first hanger (2) and the second hanger (3) are configured to be independently slidable, and the first hanger (2) and the second hanger (2) are slidable. The two hangers (3) may be driven independently by a separate servomotor, but the number of parts is increased, the equipment cost is extremely high, and the control is troublesome.

An object of the present invention is to provide a transport device that can change the pitch between the first hanger and the second hanger with a simple configuration.

[0015]

SUMMARY OF THE INVENTION This invention example Bei a plurality of machining stations, applying each processing station of the workpiece to the respective conveying device for conveying to the next processing station
A guide rail is provided on the gantry so as to extend over all the processing stations, a first slide block and a second slide block slidably supported by the guide rail, and the first slide block. A first holding means which is supported so as to be able to move up and down and transfers the work between the first working station and the second working station, and which is supported so as to be able to move up and down on the second slide block to transfer the work after the second working station; A second holding means for performing the operation, a first transfer cylinder mounted on the gantry for reciprocating the second slide block, and a second slide block mounted between the first slide block and the second slide block. And a second transfer cylinder that reciprocates the first slide block with reference to
In the work transfer device, the first processing station
Processing of the pitch P2 between the first processing station and the second processing station
The pitch between stations is set longer than P3, and the first
Slide block and the second slide block to the first
Reciprocating at the pitch P2 by the transfer cylinder,
The first slide block to the second transfer cylinder
The difference between the pitch P2 and the pitch P3 is reciprocated.
The first transport cylinder and the second transport cylinder
Are arranged vertically.

[0016]

[0017]

The above-mentioned work transfer device is provided in a first processing station.
When the operator sets a workpiece on the first machining stay,
First holding means and first slide block from above
Are separated from each other to ensure worker safety. Ma
And moving the first holding means provided on the first slide block away from the first processing station and onto the first processing station with the second holding means disposed on the second processing station. Can be. Therefore, while the work is being taken out at the first working station, the work can be taken out at the same time after the second working station, so that the waiting time at each working station can be eliminated, time loss can be eliminated, and work efficiency can be improved.

If the first transfer cylinder and the second transfer cylinder are arranged vertically, the whole apparatus becomes very compact.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same components as in the prior art are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIGS. 1 and 2, the work transfer device comprises a first processing station (A) and a third processing station (A) on a gantry (4) having a support plate (4a) mounted on the upper surface of a plurality of columns. C), a guide rail (5) is installed horizontally, and a first slide block (20) and a second slide block (21) are slidably mounted on the guide rail (5). ing. The first support block (20) attached to the first slide block (20)
In a), a first hanger (2) holding a work (1) is vertically supported via a plurality of vertical guide rods (22), and a first hanger (2) attached to a second slide block (21). The second support block (21a) supports a second hanger (3) that holds the work (1) via a similar guide rod (23) so as to be able to move up and down. And the first
The first hanger (2) is raised and lowered by the first lifting cylinder (10) provided on the slide block (20), and
The second hanger (3) is configured to be moved up and down by a second lifting cylinder (11) provided on the slide block (21).

The first transfer cylinder (2) is placed on the gantry (4).
4) is attached, the piston rod (24a) of the first transfer cylinder (24) is connected to the second slide block (21) via the bracket (25), and when the first transfer cylinder (24) performs a shortening operation. The second slide block (2
1) is arranged on the second machining station (B), and when the extension operation is performed, the second slide block (21) is arranged on the third machining station (C). The first transfer cylinder (24) is lower in height than the guide rail (5), and is installed in the guide rail (5).

There is no particular condition for the position of the first transfer cylinder (24). However, if the first transfer cylinder (24) is disposed between the pitches (P2) where there is a relatively large space as in this embodiment, the space can be reduced. Waste is eliminated, and the entire apparatus can be compactly assembled.

The main body of the second transfer cylinder (26) is mounted on the second slide block (21), and the piston rod (26a) of the second transfer cylinder (26) is attached to the first slide block (20) by a bracket (27). ) To move relative to the first slide block (20) with respect to the second slide block (21). With the second slide block (21) on the second processing station ( B ), the second transfer cylinder (2)
6) When the extension operation is performed, the first slide block (20)
Is arranged on the first processing station (A), and when the contraction operation is performed, the first slide block (20) is moved to the standby position (D) between the first processing station (A) and the second processing station (B). To be arranged. The standby position (D) is a position separated by a pitch (P3) from the second processing station (B). That is, the second processing station (B) is arranged at the center between the standby position (D) and the third processing station (C).

The main body of the second transfer cylinder (26) may be mounted on the first slide block (20), and its piston rod (26a) may be mounted on the second slide block (21).

Although various fluid pressure cylinders can be used for the first transfer cylinder (24) and the second transfer cylinder (26), it is preferable to use air cylinders. By using an air cylinder, safety is high and piping is easy, so that equipment costs can be reduced and maintenance is also advantageous.

[0026] The above-mentioned transfer device is used for the first time during work setting.
The second hanger (3) is arranged on the second processing station (B) by shortening the transfer cylinder (24), and the first hanger (2) is moved to the standby position by shortening the second transfer cylinder (26). (D).

In this state, the work (1) is set in the first processing station (A), and when the processing is completed, the second transfer cylinder (26) is extended to move the first hanger (2) to the standby position (D). ) To the first processing station (A), and then raises and lowers the first hanger (2) with the first lifting cylinder (10), and the first hanger (2)
The work (1) is taken out from the jig (not shown) of the first processing station (A).

On the other hand, when the processing at the second processing station (B) is completed, the second hanger (3) is raised and lowered by the second lifting / lowering cylinder (11), and the second processing station (2) is moved by the second hanger (3). Take out the work (1) from the jig of B).

When the workpieces (1) and (1) are taken out from the first processing station (A) and the second processing station (B), the first transfer cylinder (24) is extended, and at the same time, the second transfer cylinder (26). To move the first hanger (2) on the second working station (B) and the second hanger (3) on the third working station (C). And the first lifting cylinder (1
0) and the second lifting / lowering cylinder (11) raise / lower the first hanger (2) and the second hanger (3), and respectively hold the gripped workpieces (1) and (1) in the second processing station (B) and the second hanger. 3 Transfer to the jig of the processing station (C).

When the delivery of the work is completed, the first hanger (2) and the second hanger (3) are raised, and then the first transfer cylinder (24) is shortened to perform the first hanger (2).
Is moved to the standby position (D), and the second hanger (3) is moved to the second processing station (B). Thereafter, at the third processing station (C), the operator takes out the work (1). On the other hand, the work (1) is set in the first processing station (A).

The above-mentioned transfer device moves the first hanger (2) to the first processing station (A) while the second hanger (3) is placed on the second processing station (B).
Alternatively, since the workpiece can be selectively moved to the standby position (D) on the side thereof, the second processing is performed when the processing is completed at the first processing station (A) and the work (1) is taken out. When the processing is completed also in the station (B), the second hanger (3) is immediately moved up and down, the work (1) can be taken out also in the second processing station (B), and the waiting time is eliminated.

Although the above embodiment has been described with three steps,
When there are three or more steps, a large number of second holding means may be continuously provided on the second slide block at the pitch P3.

[0033]

According to the present invention, the second slide block is provided.
And the second holding means are arranged on the second processing station.
In this state, the second transfer cylinder is extended and retracted.
Therefore, the first slide block with respect to the second slide block
Position of the lock and the first holding means on the first processing station
Move to a position away from the machine and a position on the first processing station
The first machining step in a state where the safety of the worker is ensured.
Work can be set to
Also, the work after processing is processed by the first holding means by the first holding means.
Can be taken out of the room. Therefore, while the work is taken out at the first processing station, the second
When the processing is completed even after the processing station, the work can be taken out at the same time, and the waiting time at each processing station can be eliminated, the time loss can be eliminated, and the working efficiency can be greatly improved.

Since the first and second slide blocks are slid by the first and second transfer cylinders,
The structure is simple and the control is very easy.

By arranging the first transfer cylinder and the second transfer cylinder vertically, the whole apparatus can be made very compact and the occupied area can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a work transfer device according to the present invention.

FIG. 2 is a plan view of a work transfer device according to the present invention.

FIG. 3 is a side view showing the operation of the work transfer device according to the present invention.

FIG. 4 is a side view showing the operation of the work transfer device according to the present invention.

FIG. 5 is a side view of a conventional work transfer device.

FIG. 6 is a plan view of a conventional work transfer device.

FIG. 7 is a side view showing the operation of a conventional work transfer device.

FIG. 8 is a side view showing the operation of a conventional work transfer device.

[Explanation of symbols]

A first processing station B second processing station C third processing station P2 pitch between first processing station and second processing station P3 pitch between second processing station and third processing station 2 first holding means (hanger) 3 Second holding means (hanger) 4 Mount 5 Guide rail 20 First slide block 21 Second slide block 24 First transfer cylinder 26 Second transfer cylinder

Claims (1)

(57) [Claims] 1. A example Bei a plurality of machining stations, are applied each processing station of the workpiece to the respective conveying device for conveying to the next processing station, on the platform, installed straddling the all machining stations A guide rail; and a first slidably supported by the guide rail.
A slide block, a second slide block, first holding means supported by the first slide block so as to be able to move up and down, and transferring a work between a first working station and a second working station; A second holding means, which is supported so as to be able to transfer the work after the second processing station, a first transfer cylinder attached to the gantry and reciprocates the second slide block, And a second transfer cylinder mounted between the second slide block and reciprocating the first slide block with respect to the second slide block .
Between the first processing station and the second processing station.
Pitch P2 is calculated from pitch P3 between other processing stations
Set the first slide block and the second slide
Block by the first transfer cylinder.
2 and reciprocate and slide the first slide block forward.
The pitch between the pitch P2 and the pitch P3 is determined by the second transfer cylinder.
In addition to the differential reciprocating movement, the first transport cylinder
A work transfer device, wherein a die and a second transfer cylinder are vertically arranged .