JPH0739855Y2 - Work transfer device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is applicable to a work, such as an engine valve, which has a diameter-expanded portion in a part of a shaft portion, from a lower supply chute to a higher discharge chute. The present invention relates to a work transfer device that raises and selectively transfers a work in a plurality of directions.

[Conventional technology]

For example, an engine valve, which has a workpiece having an enlarged diameter portion on a shaft portion, is manufactured through several types of machining such as grinding of the shaft portion, turning of the umbrella portion, and cutting of the cotter groove portion. The machines are linked by various types of transport devices.

Some of the transfer devices transfer a workpiece, which has been mechanically processed in the previous process and sent to a lower position, to a higher position and then transfers the workpiece to the next process.

FIG. 6 shows an example of a conventional transfer device, which has an outlet end of a supply chute (a) provided at a low position for supplying a work which has finished the previous process, and also for transferring the work to the next process. A rising device (c) is connected to the inlet end of the discharge chute (b) which is provided at a high position.

The lifting device (c) is a pair of upper and lower sprockets (d).
(D) and an endless chain (e) wound around both sprockets (d) and (d) and running in one direction (counterclockwise in the figure)
And a hook (f) having a bifurcated U shape with its tip facing upward, which is attached at a predetermined interval to a certain side (right side in the figure) of the chain (e).

The workpieces that have been sequentially sent out to the supply chute (a) after the machining in the previous process, that is, the engine valves (g) are sent one by one to the outlet end of the supply chute (a) by the selector (h). Then, it comes into contact with a stopper (not shown) and stands by.

Then, together with the endless chain (e), the rotating hook (f) hooks the umbrella back of the engine valve and conveys it upward.

When the engine valve (g) reaches the inlet end of the discharge chute (b), the hook (f) is slightly tilted downward by the downward tilting means (not shown), whereby the engine valve (g) is hooked (f). ), Is transferred to the discharge chute (b), and is conveyed to the next step facing the same direction as the supply chute (a).

[Problems to be solved by the device]

The conventional transport device described above has the following problems.

(A) When the endless chain (e) is shaken or vibrated, the engine valve (g) may fall off the hook (f) during transportation, or the discharge chute (b) and the hook (f) may be dropped. May not work smoothly and may fall during delivery.

As a result, a defective product is generated in the engine valve, and a work piece is cut off in the next process, thereby lowering the operation rate of the machine.

(B) Since the device is complicated and large, the equipment cost is high and the installation place is limited.

(C) Since the work can be transported only in a certain direction, for example, when the machine in the next process is stopped due to a failure, or when a certain number of works have already been transported to the next process,
The lifting device (c) must be suspended.

If this happens, the workpieces that have been sent out sequentially after finishing the machining in the previous process will stay on the supply chute, and the machine in the previous process must also be temporarily stopped, resulting in a significant decrease in productivity. Invite.

The present invention has been made in order to solve the above problems, and prevents workpieces from falling, and also enables simultaneous machining of workpieces by a plurality of machines by selectively transferring the workpieces in a plurality of directions. An object of the present invention is to provide a work transfer device capable of improving the machine operating rate and the productivity.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the transfer device of the present invention, a work having an enlarged diameter portion on a part of a shaft portion is provided at a front position and a rear position at a high position from a downwardly inclined supply chute provided at a low position. A conveying device for a workpiece, which is raised to a plurality of discharge chutes and selectively transferred to the plurality of discharge chutes, wherein an outlet end of the supply chute and an inlet end of the plurality of discharge chutes are connected. An elevating means, which is erected upright, and an appropriate supporting body, which is moved up and down by the elevating means, are fixed to be inclined in the same direction as the supply chute, and support the expanded diameter part of the work fed by the supply chute. A pair of left and right work support plates are pivotally attached to the upper part of the support body so as to be rotatable in the front-rear direction, and at the time of neutrality, the lower end portion projects between the work support plates and is fed from the supply chute. Re A locking lever for locking and holding the workpiece, and a locking lever provided at a proper position in a rising locus of the locking lever, and pressing the upper end portion of the locking lever when the support is raised,
By rotating the lower end portion of the locking lever upward either to the front or to the rear, the work supported by the both work support plates is selected as one of the plurality of front and rear discharge chutes. It is provided with a plurality of switching means for carrying.

[Action]

The work fed from the supply chute between the work support plates is held by abutting the lower end portion of the locking lever hanging from the neutral position.

When the work support plate holding the work is lifted to a position at which the work support plate holding the work is substantially level with one of the front and rear discharge chutes, the lower end of the locking lever is moved forward or backward by the switching device. It is turned upward in either direction.

When the lower end of the locking lever is rotated forward, the work slides down on the work support plate and is transferred to the discharge chute provided in the front, and when it is also rotated rearward, the work is locked. It is pushed out by the lever and transferred to the discharge chute provided at the rear.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In FIGS. 1 and 2, (1) is the work sent out from the previous process, that is, the engine valve (2).
Is a feed chute for carrying by a pair of left and right parallel guide plates (3) and (3) which are inclined toward the lower front (hereinafter, the left side in FIG. 1 is described as the front).

Above the supply chute (1), it is formed by a pair of left and right guide plates (4) and (4) inclined in the opposite direction to the guide plates (3) and (3), and is conveyed by the supply chute (1). A first discharge chute (5) is provided for transferring the engine valve (2) to the next step in the direction opposite to the direction in which the engine valve (2) is sent to the supply chute (1) through a work transfer body described later. Has been.

Further, a pair of left and right guide plates (6) and (6) inclined downward in the same direction as the guide plates (3) and (3) are formed diagonally above and above the supply chute (1), and the engine valve (2). A second discharge chute (7) for transporting the above) in the same direction as the direction in which it is sent to the supply chute (1).

Reference numeral (8) is a rodless cylinder as an elevating means provided upright between the outlet end of the supply chute (1) and the inlet ends of both the first and second discharge chutes (5) and (7). An elevating body (11) that moves up and down along the side surface of the cylinder case (9) as the piston (10) moves up and down is connected to the piston (10) housed in the chamber 9).

Reference numeral (12) is a work carrier provided on the right side (left side in FIG. 2) of the rodless cylinder (8), and the side surface of the base frame (support) (13) whose front shape is almost square is , A stopper (14) provided at the lower end of the rodless cylinder (8) by fixing bolts (15) (15) to the elevating body (11) via the spacers (14) (14) in a slightly downward inclined shape. It is possible to move up and down from a lower limit position where it abuts against (not shown) to an upper limit position where it comes into contact with a stopper (not shown) also provided at the upper end.

In the lower piece (13a) in the base frame (13), the notch groove (1
6) has been formed.

The lower corners of the base frame (13) face the front-rear direction, and a pair of left and right work support plates (17) (17) that incline the supply chute (1) in the same direction are It is fixed in an inverted inverted V shape.

The upper ends of a pair of left and right vertical pieces (18) (18) which are separated from each other by substantially the same width as the cutout groove (16) are fixed to the lower end edges of the opposing work support plates (17) (17) so as to face downward. ing.

When the work carrier (12) is located at the lower limit, the supply chute (1) and the work support plate (17) are
The two guide plates (3) of the supply chute (1) and the two guide plates (3) of the supply chute (1) and the relative widths of the two vertical pieces (18) are substantially linearly aligned and close to each other. (See Figure 1).

Further, when the work carrier (12) is raised to the upper limit position, the front and rear ends of the work support plate (17) become the inlet ends of the first and second discharge chutes (5) (7), respectively. It is arranged so as to be close to each other at almost the same height (see FIGS. 3 and 4).

The engine valve (2) sent from the supply chute (1) to the work carrier (12) has its umbrella portion (2a) supported by both work support plates (17), and the shaft portion (2b) described above. It is conveyed in a state of being projected downward from between the notch groove (16) and both vertical pieces (18).

On the upper surface of the base frame (13), a base piece (19
a) and a pair of left and right support pieces (19
b) The front end (base piece side) of the bracket (19) made of (19b) is fixed.

A stepped bolt (20) facing in the left-right direction is fixedly passed through between the rear ends of both support pieces (19b) (19b), and a collar (21) is freely rotatable on the stepped bolt (20). Is loosely fitted to.

A substantially middle portion of the locking lever (22) is fixed to a central portion of the rear surface of the collar (21) in a vertical direction orthogonal to the collar (20).

The locking lever (22) is inserted into the collar (20) with their twisting directions being opposite to each other, and one end is locked to the locking lever (22) and the other end is locked to both support pieces (19b). By a pair of torsion coil springs (23a) (23b), it is urged to a substantially vertical neutral position, and in a normal state,
The lower end of the work support plate (17) and the vertical pieces (18) project between the work support plates (17) and the vertical pieces (18) to hang down.
The engine valve (2) fed into the engine is prevented from sliding down.

Above the locking lever (22) and in the rodless cylinder (8)
To the side of the upper end of the first cam surface (24
The switching means including the a) and the second cam surface (24b) inclined rearward and upward, that is, the cam plate (24) is rotatably attached to the bracket (25) fixed to an appropriate support (not shown). It is pivotally attached.

(26) is an air cylinder mounted on the bracket (25), the tip of the piston rod (26a) of which is connected to the upward piece (24c) connected to the cam plate (24). There is.

As a result, the cam plate (24) is rotated by a predetermined angle in the front-rear direction, and when it is rotated counterclockwise in side view, as shown by the dashed line in FIG. 1, the upper end of the locking lever (22). The lateral columnar slider (27) fixed to the first slider contacts the first cam surface (24a) and slides, and when the slider (27) rotates clockwise as indicated by the solid line, 27) is the second cam surface (24b)
It comes in contact with and slides.

Next, the operation of the above embodiment will be described.

First, the transfer of the engine valve (2) conveyed by the supply chute (1) to the second discharge chute (7) will be described. In this case, the piston rod (26
(a) is retracted, and the cam plate (24) is previously rotated clockwise.

As shown in FIG. 1, the engine valve (2) which has been conveyed by the supply chute (1) after the previous process is completed,
Rodless cylinder (8) with selector device (28)
In the state where the umbrella portion (2a) is brought into contact with the lower end portion of the locking lever (22) while being fed one by one to both the work support plates (17) of the workpiece transfer body (12) waiting at the lower limit of Drooped and held.

When compressed air is sent to the rodless cylinder (8), the work transfer body (12) rises with the engine valve (2) held, and when approaching the upper limit, the work transfer body (12) is locked as shown in FIG. The slider (27) provided on the upper end of the lever (22)
By being brought into contact with and guided by the second cam surface (24b) of the cam plate (24), the locking lever (22) resists one torsion coil spring (23a) and moves clockwise from the neutral position. Is forced to rotate.

When the work carrier (12) further rises and reaches the upper limit,
The engine valve (2) is released, and it slides on both work support plates (17) by its own weight, and it is exposed to the front end of the second.
It is transferred to the discharge chute (7) and transported to the next step.

Next, transfer of the engine valve (2) to the first exhaust chute (5) will be described.

In this case, the piston rod (26a) of the air cylinder (26) is extended to rotate the cam plate (24) counterclockwise in advance.

As shown in FIG. 4, when the workpiece carrier (12) reaches the upper limit with the engine valve (2) being held, the slider (27) moves to the cam plate (24) as described above. By contacting the first cam surface (24a), the locking lever (22) is forced to rotate counterclockwise from the neutral position against the other torsion coil spring (23b).

As a result, the engine valve (2) is pushed rearward by the lower end portion of the locking lever (22), and the work support plate (17).
It is transferred to the first discharge chute (5) facing the rear end and conveyed to the next step.

As described above, in the above-described embodiment, the cam plate (24) is rotated to switch the cam surface, and the first and second cam plates are changed.
Since the work can be selectively transferred to the discharge chutes (5) and (7) of the above, for example, when the work tool on one of the discharge chutes is stagnant due to the stop of the machine tool in the next process, etc. , The other discharge chute can be used to transfer to another machine tool.

Therefore, the work sent from the previous process can be continuously conveyed without being retained on the supply chute (1).

Further, if the workpieces are alternately transferred to the first and second discharge chutes (5) and (7), the workpieces can be simultaneously machined by two machine tools, and the productivity is increased.

The present invention is not limited to the above embodiment, but can take various modes.

For example, as shown by the chain line in FIG. 1, a third discharge chute (inclined in the same direction as the second discharge chute (7)) at an appropriate intermediate position below the second discharge chute (7). 30)
In addition, when the work support plate (17) of the work carrier (12) approaches the third discharge chute (30) at substantially the same height, the work supporting plate (17) enters the ascending track of the work carrier, A cam plate (31) for stopping the rising of the work transfer body (12) and rotating the locking lever (22) clockwise.
Is provided so as to be movable in the front-rear direction by an air cylinder (32) or the like, the engine valve (2) can be selected and conveyed in three directions.

Similarly, a fourth discharge chute (not shown) inclined in the same direction as the first discharge chute (5) is provided below the first discharge chute (5), and the cam plate (31) is provided. ), A cam plate (not shown) having a cam surface opposite to the cam surface of the cam plate (31) is provided so as to be movable in the front-rear direction in the same manner as described above, and thus in four directions. It is also possible to select and transport.

The switching operation for transferring the work to each of the discharge chutes is performed by manually operating each air cylinder,
Alternatively, it can be automatically performed by alternately operating each air cylinder in response to a request signal or the like issued from each machine tool linked to each discharge chute.

As the switching means for selecting and transferring the work to the first and second discharge chutes (5) (7), an air cylinder (33) as shown in FIG. 5 is used instead of the cam plate (24). You can also

That is, the body of the air cylinder (33) is rotatably pivotally attached to the bracket (34) provided above the rodless cylinder (8), and the upper end of the air cylinder (33) is attached to another air cylinder ( 35) piston rod (35a)
Any one of the bent pieces (36a) (36b) connected to the upper end of the locking lever (36) in the front-back direction.
As shown by the dashed-dotted line in FIG. 2, by rotating the air cylinder (33) and projecting the piston rod (33a) of the air cylinder (33a) and pushing it forward or backward, the work is moved to the cam plate (24). Similarly, two directions can be selected and transferred.

In this case, two air cylinders for pressing the bending pieces (36a) (36b) may be individually provided.

As means for rotating or moving the cam plates (24) (31) and the air cylinder (33), an electromagnetic solenoid or other actuator may be used instead of the air cylinder.
Alternatively, a manual switching operation may be performed without using such a thing.

Needless to say, the work transfer direction can be set to four or more directions.

[Effect of device]

According to the present invention, only by switching the switching means, the work sent to the supply chute provided at the low position is selectively and reliably supplied to the plurality of discharge chutes provided at the front and the rear of the high position. Therefore, it is possible to prevent the transfer device and the machine in the previous process from being temporarily stopped and the work from being retained as in the conventional case, and it is possible to improve the operation rate of the machine.

Further, since the work can be simultaneously processed by a plurality of machines, the productivity is improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a side view of a main part of the same when a work is ejected forward, and FIG. FIG. 5 is a side view of the main part when the work is discharged backward, FIG. 5 is a side view of the main part showing another embodiment of the present invention, and FIG. 6 is a schematic configuration diagram showing a conventional transfer device. (1) …… Supply chute (2) …… Engine valve (work) (2a) …… Umbrella part (expanded part), (2b) …… Shaft part (5) …… First discharge chute, (7 ) …… Second discharge chute (8) …… Rodless cylinder (elevating means) (11) …… elevator, (12) …… work carrier (13) …… base frame (support), (13a ) …… Lower piece (17) …… Workpiece support plate, (18) …… Vertical piece (19) …… Bracket, (20) …… Step bolt (21) …… Color, (22) …… Locking Lever (23a) (23b) ... torsion coil spring (24) ... cam plate (switching means), (24a) (24b) ... cam surface (25) ... bracket, (26) ... air cylinder (26a) ) …… Piston rod, (27) …… Slider (30) …… Third discharge chute, (31) …… Cam plate (switching means) (32) …… Air cylinder (33) …… Air cylinder ( Switch means) (35) ... air cylinder, (36) ... locking lever (36a) (36b) ... bending piece

Front page continued (72) Creator Takashi Mishima 2958 Ishikawa, Fujisawa City, Kanagawa Prefecture Fuji Valve Co., Ltd. Fujisawa Factory

Claims (4)

[Scope of utility model registration request] 1. A work having a diameter-expanded portion on a part of a shaft is raised from a downwardly inclined supply chute provided at a low position to a plurality of discharge chutes provided at a front position and a rear position at a high position, A work transfer device for selectively transferring to the plurality of discharge chutes, which is an elevating means provided upright to connect the outlet end of the supply chute and the inlet end of the plurality of discharge chutes, A pair of left and right work support plates that are fixed to an appropriate support that can be raised and lowered by the elevating means incliningly in the same direction as the supply chute, and that support the expanded portion of the work fed by the supply chute; A member that is pivotally attached to the upper portion of the support body so as to be rotatable in the front-rear direction, and has a lower end portion that protrudes between the work support plates and is in a neutral state so as to retain and hold the work fed from the supply chute. Stop lever A lock lever is provided at a proper position within the rising locus of the locking lever, and when the support is lifted, the upper end of the locking lever is pushed down,
By rotating the lower end portion of the locking lever upward either to the front or to the rear, the work supported by the both work support plates is selected as one of the plurality of front and rear discharge chutes. A work transfer device, comprising: a plurality of switching means configured to transfer the work. 2. The work transfer device according to claim 1, wherein the switching means is a cam plate rotatably provided above the elevating means and having front and rear surfaces having cam surfaces which are inclined opposite to each other. 3. The work transfer apparatus according to claim 1, wherein the switching means is an air cylinder provided above the elevating means with the piston rod facing downward and the protruding direction movable back and forth. 4. A cam lever or an air cylinder below a position where the locking lever moves upward by turning into the rising locus of the locking lever, and the locking lever does not pass beyond the position where the locking lever moves upward. The work transfer device according to claim (2) or (3), wherein a cam plate that can move back and forth up to an allowable position is provided.