JP2563573Y2 - Product loading / unloading device in hemming machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a product loading / unloading device in a hemming machine for hemming a door panel of an automobile, for example.

[0002]

2. Description of the Related Art Conventionally, a product carrying-in / out device attached to this type of hemming machine is configured to include a conveyor body of a belt conveyor type and a drive motor for driving the conveyor body. After the product is ejected from the lower mold by raising the conveyor body from the inside of the lower mold, the conveyor motor is driven by a drive motor to carry in and out the product in the horizontal direction. It was configured integrally with the conveyor body.

[0003]

For this reason, for example, when the product shape is changed, it is necessary to replace the entire product carrying-in / out device (conveyor main body and drive motor) together with the hemming type, and the cost is reduced. In addition to the bulkiness, there is a problem that it takes time to adjust the hemming machine for full-scale production of the product.

The present invention has been made in view of this problem, and even if the product shape is changed by generalizing the product carrying-in / out device as much as possible, a part (specifically, a driving motor The present invention provides a product carrying-in / carrying-out device in a hemming machine which can reduce the cost and can perform the above-mentioned adjustment work of the hemming machine in a short time. The purpose is to:

[0005]

According to the present invention, in order to solve the above-mentioned conventional problems, a drive motor as a drive source for a main body of a conveyor, which is a main body of a product carry-in / out device, is attached to the lifter side and the main body of the conveyor is provided. And wherein the lifter is lifted up and connected to the conveyor main body so as to be able to transmit a driving force only when the conveyor main body is lifted.

[0006]

According to the above construction, the drive motor for driving the conveyor main body is provided separately from the conveyor main body, so that when the product shape is changed,
It is sufficient to replace only the conveyor body which is a dedicated product for each product shape, and the drive motor can be used without replacement.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. The hemming machine is of a conventionally known type using upper and lower hemming dies. Of the upper and lower hemming dies, the upper die does not particularly need to be changed, and therefore the description and illustration thereof are omitted.

The lower mold 1 is formed substantially hollow, and the upper surface of a peripheral portion corresponding to a peripheral edge of a workpiece (for example, a door panel including an outer panel and an inner panel) to be subjected to hemming processing is mainly specified. Is formed into a molding surface, and the inner peripheral side of the molding surface is formed as a hollow opening vertically. Also,
On the inner peripheral side of the bottom of the lower die 1, seats 1a to 1a for mounting a conveyor main body 40 described below are provided so as to protrude at four appropriate positions around the seats. After placing the work on the molding surface of the lower mold 1 thus formed in a predetermined posture, when the upper mold is lowered, the periphery of the work is hemmed and the product 18 (the periphery of the outer panel is bent at a constant width). Thus, a door panel integrated with the inner panel can be obtained.

The product 18 thus obtained is carried out of the lower mold 1 after the upper mold is retreated upward, and the next work is carried into the lower mold 1 instead. Equipped with an unloading device. As shown in the figure, the product loading / unloading device includes a conveyor body 40 stored in a hollow portion of the lower mold 1, a drive motor 8 for driving the conveyor body 40, and a lower mold 1
And a lifter 50 for moving the product 18 from the molding surface by moving it upward from the molding surface.

First, the conveyor main body 40 is a dedicated product prepared variously according to the product shape, and is exchanged together with the upper and lower hemming dies as the product shape is changed. The conveyor main body 40 is configured and unitized on the base 3, is housed from the upper portion on the inner peripheral side of the lower mold 1, and is configured to be installed on the bottom, that is, on the seats 1 a to 1 a. The lower mold 1 can be removed from the inside and easily replaced.

An opening 3a is formed in the center of the base 3 so that the driving motor 8 can pass therethrough. Positioning holes 3b to 3b and 3c to 3c having a predetermined diameter are formed at four positions on the periphery of the opening 3a and at four positions further on the outer periphery, and four positioning holes 3b to 3b near the center are formed.
By inserting the positioning pins 2 to 2 protruding upward from the seating surfaces 1 a to 1 a of the lower mold 1, the lower mold is positioned in a state where the base 3 and thus the conveyor body 40 are positioned at a predetermined position. 1 is housed inside. The positioning holes 3c to 3c near the outer periphery will be described later.

Further, as shown in FIG. 2, a support bracket 20 (omitted in FIG. 1) is attached to a predetermined position (the left end in the figure) of the base 3, and is provided between both standing edges of the support bracket 20. The floating arm 17 is supported by the hinge pin 15 so as to be able to swing up and down. The swingable range of the floating arm 17 is regulated by upper and lower stopper pieces 20a and 20b attached to the support bracket 20, and the floating arm 17 is held substantially horizontally by the upper stopper piece 20a. (The state shown). A floating spring 16 is mounted between substantially the center of the floating arm 17 and the support bracket 20, and the floating arm 17 is
The floating arm 17 is always urged downward by a constant force, so that the floating arm 17 is always in contact with the lower stopper piece 20b.

The distal end of the floating arm 17 thus supported faces the opening 3a of the base 3, and a driven end for transmitting the rotation of the drive motor 8 is provided at the distal end. The gear 12 and the sprocket 13 are coaxially and integrally rotatably supported. As described above, the driven gear 12 is supported swingably in the vertical direction about the hinge pin 15 and is supported by the floating arm 17 urged downward by the spring 16 so that the drive motor 8 is lifted. In this case, the driving gear 10 smoothly meshes with the driven gear 12, and the driven gear 12 is pressed against the driving gear 10 with a constant force, so that the driving force is reliably transmitted.

A sprocket 28 is supported on the opposite side of the opening 3a, and a chain 14 extends between the sprocket 28 and the sprocket 13 on the floating arm 17 side. The sprocket 28 has a U-shaped support bracket 2 as shown in FIG.
1 are rotatably supported by a support shaft 29. Transmission shafts 23, 23 are connected to both ends of the support shaft 29 via universal joints 22, 22, and the distal ends of both transmission shafts 23, 23 Transport rollers 5, 5 are attached. Both transmission shafts 23,
23 is rotatably supported by holding brackets 24, 24 in a state inclined upward with respect to a support shaft 29, whereby the peripheral surfaces of both transport rollers 5, 5 are placed on the placed product 18 (or workpiece). ). Therefore, the angle of inclination of both transmission shafts 23, 23 is set according to the shape of the product 18 (or work), and this is one of the factors that make the conveyor main body 40 a dedicated product according to the product shape. . In FIG. 2, reference numeral 19 denotes a tension sprocket for keeping the tension of the chain 14 constant.

Further, as shown in FIG. 2, transport rollers 6, 6 are disposed near the right end of the base 3 as shown in FIG. These transport rollers 6, 6
The holding brackets 25, 25 having the same shape as the holding brackets 24 of the transport rollers 5, 5 are rotatably supported in a state in which the peripheral surface thereof is also inclined at the same angle so as to hit the entire surface of the product 18 (or the work). I have.

The transport rollers 5,5 and the transport rollers 6,6
The conveyor belts 27, 27 are attached in a bridging manner, respectively, and the conveyor belts 27, 27 come into contact with the entire surface of the product 18 when the conveyor body 40 is lifted. 18 is conveyed in a direction perpendicular to the plane of the paper in FIG. 1 (left-right direction in FIG. 2).

The conveyor main body 40 formed on the base 3 in this manner, when housed in the bottom of the lower die 1, prevents the carry-out rollers 5, 6, etc. from jumping out of the molding surface of the lower die 1. The height is regulated so that they do not interfere with the workpiece being hemmed.

Next, the lifter 50 for lifting the conveyor body 40 unitized on the base 3 as described above will be described. The lifter 50 is installed below the lower mold 1 as shown in FIG. 1, and has a configuration in which the lift base 4 is supported by a lift cylinder 7 so as to be vertically movable.

The lift cylinder 7 is a base 3 of the hemming machine.
The rod is mounted on a mounting base 32 mounted on the first base 1 with its rod directed upward, and the tip of this rod is fixed substantially at the center of the lift base 4. Guide shafts 33, 33 are supported on both sides of the mounting base 32 via linear bearings 34, 34 so as to be slidable in the vertical direction and parallel to the stroke direction of the lift cylinder 7. The upper ends of the shafts 33 are fixed to both sides of the lift base 4. Thus, the lift base 4 smoothly moves up and down in a state where the rotation is stopped.

At approximately the center of the upper surface of the lift base 4, a drive motor 8 as a drive source of the above-described conveyor body 40 is mounted. The output shaft of the drive motor 8 is provided with a drive gear 10 that can mesh with the driven gear 12 of the conveyor main body 40. The drive motor 8 has the drive gear 10 located on the same plane as the driven gear 12. It is attached to be in a state.
Further, as shown in FIG. 2, the position of the drive motor 8 is set so that the drive gear 10 meshes with the driven gear 12 with the axis thereof being slightly shifted in the horizontal direction (left and right directions in the drawing).
Also at this point, the drive gear 10 and the driven gear 12 are easily meshed.

At the four corners of the upper surface of the lift base 4, blocks 9 to 9 of a predetermined height are attached.
1 is mounted so as to protrude upward. The four positioning pins 11 to 11 are
Are disposed corresponding to the four positioning holes 3c to 3c near the outer periphery in a state where the positioning pins are positioned at the bottom of the lower mold 1. When the lift cylinder 7 is operated and the lift base 4 is raised, each positioning pin 11 is moved. 11 to 11 are respectively inserted into the positioning holes 3c to 3c on the conveyor body 40 side. As a result, the conveyor main body 40 is lifted without being displaced in the horizontal direction, and when the lift base 4 is lowered, the positioning pins 2 to 2 on the lower mold 1 side are directly inserted into the four positioning holes 3b to 3b near the center. Is inserted, and is housed in a state of being positioned at the bottom of the lower mold 1.

The main base 3 on which the lower mold 1 is mounted
At 0, an opening 30a is cut out in a range enough for the lift base 4 to pass through.

Next, the operation of the product loading / unloading device will be described. At the time when the upper mold is lowered and the work is hemmed, the lifter 50 retreats downward, and the conveyor body 40 is housed in the bottom of the lower mold 1. At this time, each positioning hole 3b of the base 3
Positioning pins 2 and 2 are inserted into 3 to 3b, and the conveyor main body 40 is positioned at a predetermined position. After the hemming process, when the upper die retreats upward, the product 18 remains on the molding surface of the lower die 1 with the product 18 placed thereon, and the product loading / unloading device operates from this state.

First, the lift cylinder 7 operates to lift the lift base 4. During this ascent, lifter 5
The positioning pins 11 to 11 on the 0 side are respectively inserted into the positioning holes 3c to 3c on the side of the conveyor body 40, and the conveyor body 40 is positioned with respect to the lifter 50.
In this state, the lifter 50 further rises and lifts the conveyor body 40 from the bottom of the lower mold 1.

On the other hand, at the same time when the conveyor main body is positioned with respect to the lifter 50, the drive gear 10 is engaged with the driven gear 12 and connected thereto. At this time, both gears 1
The tooth shift of 0, 12 is caused by the fact that the driven gear 12 is supported by the floating arm 17 or the two gears 10,
Since the gears 12 are slightly offset from each other in the horizontal direction, they are absorbed and the two gears 10 and 12 are smoothly meshed and connected.

When the lifter 50 further rises and the conveyor body 40 is lifted, the product 18 is transported to the conveyor belts 27 and 2.
7 is ejected from the molding surface of the lower die 1 while being placed on the lower die 7. When the product 18 and the conveyor body 40 are ejected to the position shown by the two-dot chain line in the figure, the lift cylinder 7
Is locked, the lifter 50 is stopped at this position, and the eject state of the product 18 is maintained.

In this way, when the product 18 is ejected so that the molding surface of the lower mold 1 is at a sufficient height, the drive motor 8 is operated. The rotation of the drive motor 8 is transmitted to the transport rollers 5, 5 via the drive gear 10, the driven gear 12, the sprocket 13, the chain 14, the sprocket 28, and the transmission shafts 23, 23, so that the transport belts 27, 27 are the same. Rotate in the direction. As a result, the product 18 moves in the same direction and is carried out of the hemming mold, and the carried-out product 18 is carried into the next step by a separately provided conveyor (not shown).

On the other hand, as the product 18 is carried out, the next work (work having the same shape) is carried into the hemming mold from a previous step by a conveyor (not shown) provided separately. The newly introduced work is transferred to the operating conveyor belts 27 and 27 and is carried to a predetermined position above the lower mold 1. When the work is carried into a predetermined position, the drive motor 8 is stopped, and the transport belts 27, 27 are stopped.

Thus, when the next work is carried into the predetermined position above the lower mold 1, the lift cylinder 7 operates to lower the lifter 50 and lower the conveyor body 40. This work is placed and set on the molding surface of the lower mold 1 while the conveyor body 40 is being lowered. When the lifter 50 further descends, each of the positioning holes 3c to 3c of the base 3
The positioning pins 2 and 2 are inserted into the lower die 1 so that the conveyor main body 40 is stored in a predetermined position on the bottom of the lower die 1.

After the conveyor body 40 is housed in the bottom of the lower mold 1, when the lifter 50 further descends, the drive gear 10
Is separated from the driven gear 12, and the drive motor 8 as a drive source of the conveyor main body 40 is separated from the conveyor main body 40.

When the lifter 50 reaches a predetermined position below the lower mold 1 (a position indicated by a solid line in the figure), the lift cylinder 7 is stopped, and the lifter 50 is stopped and held at this position. It descends and the next hemming process is started.

This embodiment is a product loading / unloading device having the above-described configuration, and has the following effects. That is, the drive motor 8 for driving the conveyor main body 40 in the product loading / unloading device of this embodiment is attached to the lifter 50 side separately from the conveyor main body 40, and when the lifter 50 moves upward, Only this drive motor 8 is connected to the conveyor main body 40 so as to be able to transmit a driving force.

From this, when the shape of the product is changed, in addition to the upper and lower hemming types, the conveyor body 40
Is changed, the drive motor 8 can be used as it is. Here, since the conveyor body 40 is housed on the bottom surface of the lower mold 1, if the lower mold 1 is removed from the main base 30 and replaced, the conveyor body 40 is simultaneously removed as a set and replaced. Is done.
Further, if the lower mold 1 is attached to a predetermined position of the main base 30, the conveyor body 40 housed in a state positioned on the bottom surface of the lower mold is also set at the predetermined position.

As described above, only the conveyor main body 40 of the product loading / unloading device is a dedicated product, and the drive motor 8 is configured to be general-purpose. It was possible to quickly perform the adjustment work for the target and reduce the equipment cost.

Further, since the drive motor 8 can be separated from the conveyor main body 40 to have a compact structure, the space for accommodating the lower mold 1 can be smaller, and in particular, the height of the lower mold 1 can be reduced. Therefore, the weight of the lower mold 1 can be reduced.

Further, conventionally, in the hemming process, the upper pressing (the pressing direction is upward, that is, the lower die is a movable die) is generally used. Hemming can be performed even when the pressure direction is downward (that is, the upper die is a movable die), whereby the number of operations of the lifter 50 during the transfer of the work can be reduced, and the tact time can be shortened.

[0037]

[Effect of the Invention] In the present invention, the drive motor for driving the conveyor main body is separated from the conveyor main body and attached to the lifter side, and the driving force is transmitted to the conveyor main body only when the lifter rises during product loading / unloading. As a configuration that can be connected, only the conveyor body is a dedicated product, while the drive motor is a general-purpose product, so even if the product shape is changed, if only the conveyor body is changed Since the sufficient drive motor can be used as it is,
The cost of equipment can be reduced, and the adjustment work of the hemming machine for full-scale production of the product can be quickly performed.

Further, since there is no need to provide wiring and piping in the mold, the mold can be replaced within the line tact, and parallel production of odd-shaped doors becomes possible.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a product loading / unloading device and a lower mold according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower die, 1a ... Seat 2, 11 ... Positioning pin 3 ... Base, 3a ... Opening, 3b, 3c ... Positioning hole 4 ... Lift base 5, 6 ... Conveyance roller 8 ... Drive motor 10 ... Drive gear 12 ... Follower Gears, 13, 28 ... Sprockets, 14 ... Chains 17 ... Floating arms 18 ... Products 27 ... Transport belts, 28 ... Sprockets 30 ... Main base, 30a ... Openings 31 ... Stands 40 ... Conveyor body 50 ... Lifters

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower die, which is paired with an upper die as a hemming die, is a hollow body in which an inner peripheral side of a molding surface formed corresponding to a peripheral edge of a work to be hemmed is opened in a vertical direction. A seat for mounting a belt conveyor type product loading / unloading device is provided on the bottom inner peripheral side so as to protrude therefrom, and the lifter rises through the inner peripheral side of the seat so as to raise the product loading / unloading device. Is lifted and the product is ejected from the molding surface of the lower die, while the lifter is lowered to store the product loading / unloading device under the molding surface of the lower die in a state of being placed on the seat. The product loading and unloading device in a hemming machine of the type described above, wherein a drive motor as a drive source of a conveyor body that is a main body of the product loading and unloading device is attached to the lifter side and separated from the conveyor body. Distribute And, the product loading and unloading device in a hemming machine, characterized in that the lifter is configured to be coupled to the conveyor main body to be able to transmit the driving power only in a state lifted the conveyor main body to rise.