JPS63288810A - Parallel crank type article transfer device - Google Patents

Abstract

PURPOSE:To make exact transfer possible without requiring work precision and strength in the title device for removing foundry sand, etc., by fixing the rotation center of a main crank and supporting the rotation center of a follower crank by means of a resilient member to allow micro-displacement. CONSTITUTION:A main shaft 15a is rotated to rotate a crank arm 12a so as to cause parallel rotation crank motion together with a frame 11 and a crank arm 12b. In the process of this motion, an article receiving plate 6 repeats ascending, advancing, descending, and retreating by means of an actuating plate 9 so as to advance an article. If an exact parallelogram is not formed at this time because size error exists in the crank arms 12a, 12b and the table 11, this size error can be absorbed, since a follower crank arm 15b is supported by a rubber plate 18 to be capable of micro-displacement, so the article can be transferred without breakage or the like.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to a parallel crank type article transfer device.

[Conventional technology and its problems]

Figure 5 shows the operating principle of this type of device.1
The person is an active crank that can rotate around the first center 010, C
is the second center O! A driven crank is rotatable around the driving crank and has the same length as the driving crank. Crank C2, the operating link B, the first center 01 and the second center 0. A parallelogram is formed by the line segments connecting the 9 and 9, and the center of the active crank Ai is set to 0. When the operating link B is driven to rotate around the
The upper part receives the article to be transferred, and in the latter half cycle Q, the article is separated from the actuating link B, and the article receiving part (for example, consisting of a number of slatted bars, between which the actuating link B is located) The article is received by the transfer surface 8 of the article receptacle, and the article is transferred in a fixed direction on the article receiving portion.

However, unless A, B, C, and D form a perfect parallelogram, one smooth rotational motion cannot be sustained.

If there is even a slight dimensional error in any of A, B, C, and D, it will become impossible to rotate at a certain angular phase, or one of the members will be damaged or deformed. In this case, the desired parts transfer effect cannot be obtained.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above problems, and an object of the present invention is to provide a parallel crank type article transfer device that can reliably obtain the desired article transfer action without requiring high processing accuracy or very high strength. purpose.

[Failure to solve the problem]

The above object is to provide a driving crank that is rotatable around a first core, and a driven crank that is rotatable around a second center and has the same length as the driving crank.

The driving crank and the driven crank are comprised of an operating link pivotally attached to one end of each of the driving crank and the driven crank, a drive unit that rotates the driving crank around the first center, and an article receiving part.

A parallelogram is formed by a line segment connecting the operating link and the first center and the second center, and when the drive unit rotates the active crank, the operation is performed during approximately half a cycle of the rotation. The article to be transferred is received on the link, and in about the next half cycle, the article is removed from the operating link and the article is received by the article receiver, and the article is transferred in a fixed direction on the article receiver. In the parallel crank type article transfer device, the first center is fixed, but the second center is pressed by an elastic member so that it can be slightly displaced. achieved by the device.

[For production]

Even if there is a slight error in the length of the driving crank, the driven crank, the length of the working link, or the distance between the first center and the second center, the second center, that is, the rotating end of the driven crank, will deform the elastic member. Since it can be displaced in any direction, there is no possibility that any member will be damaged or unable to make one rotation. - Machining costs can be reduced because conventional high-precision machining is not required.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Parallel crank type article transfer apparatuses according to two embodiments of the present invention will be described below with reference to FIGS. 1 to 4. This device is applied to removing sand from castings, and in FIG. 2, in the vibrating section (1), vibrating motors (2m) (2b) are attached to the outer surfaces of both side wall plates (3), respectively.

A spring (5m) (5b) is interposed between the spring receiving part (404) projecting laterally in the lower part of the side wall plate (3) and the lower pillar (8) (8). i.e. side wall plate (3)
By driving vibration electric motors (2a) and (2b), the can vibrate in the vertical direction.

As shown in Fig. 1, the side wall plate (3) is reinforced with reinforcing ribs at each part, and the both side wall plates (3) are connected at the lower part by a plurality of horizontal members (7) K. A large number of article receiving plates (6) are arranged and fixed in parallel on the member (7) at predetermined intervals.

The vibrating part (1) is constructed as described above, but independently of this, a pedestal α having a larger external shape is arranged below the side wall plate (3). has a rectangular shape as shown in Fig. 3, and the front and rear short sides are located in the middle of the two, and a mounting block αQ for fixing a large number of actuating plates (9) is fixed thereto. ing. Numerous actuating plates (
As shown in FIG. 2, two 9) are located between the above-mentioned article receiving plates (6). And these extend parallel to the top and bottom.

A crank arm (tza) (12b) extending downward is fixed to the opposing long sides of the pedestal striker, and a bearing member (t3m) (tab) is provided integrally with this. ) (14b), the axis (
t5a) (15b) is fixed. Axis (15m) (
15b) is rotatably supported by a bearing block (t6m) (tab). One of the bearing blocks (1611) is installed directly on the base αη, but in this embodiment, the shaft on the right (r5m) in FIG. 1 is the main drive shaft, and the shaft on the left (15b) is It is a driven shaft. Therefore, the main drive shaft (t5a) is the electric motor c! D reduces the speed reducer (1),
It is rotationally driven via the coupling mechanism, and this rotational driving force is transmitted to the driven shaft (tab) via the frame συ and the other crank arm (tzb).

In this example, the bearing block (16m) on the driving shaft (15m) side is integrally fixed to the base αη, but the bearing block (x6b) on the driven side is attached to the base via a rubber plate (g). It is supported on αη. i.e. the bearing block (xsb) and therefore the shaft (
15b) is movable vertically and horizontally in FIG. 5 by deforming the rubber plate (to), which is an elastic member. Further, a stopper member is fixed to the base aη, located on the side of the mounting plate 6Q to which the bearing block (16b) is attached. The amount of upward movement of the bearing block (16b) is regulated by this K. As shown in Fig. 3, the crank arm (12a) (work 2b) is also fixed to the opposite long side of the mount ση, and this driven side bearing block (16b) is similarly fixed to the rubber plate ( G) is supported on a base (17). A crank member (
2f; J@ is attached, and these are further coupled by a coupling member Q4).

As clearly shown in Figures 2 and 3, the main drive shaft (151
On the side of 25b) is fixed.The positions of the centers of gravity are as follows with respect to the axes (tsa) and (tsb).
It is constructed such that the roller is located at a position opposite to the center of gravity of the gantry aη9 operating plate (9) etc. located above.

In other words, this device is driven by the electric motor Qυ, and the rotational moment of the entire driven object is configured to be as small as possible due to this unbalanced way (25a) (25b). .

Although the embodiment of the present invention is configured as described above,
The basic configuration of this is shown in FIG. 4. In other words, the length of the active crank (a) corresponds to the eccentric distance of the inner ring (t4m) of the bearing member (131) from the axis of the shaft (151) supported by the bearing block (iaa) in FIG. Similarly, the driven crank (C) is located at a distance from the axis of the driven shaft (15b) supported by the bearing block (lsb) to the center of the inner ring (x4b) of the bearing member (x3b) in Fig. 1. handle. In addition, the operating link (b) is the bearing member (13a) (
13b) corresponds to the distance between the centers of the inner rings (14m) and (14b). Further, (d) corresponds to the distance between the axial center of the main shaft (t5a+) and the axial center of the driven shaft (15b). The shaft (15a) on the driven shaft side is supported by a rubber plate (15a) serving as a spring.

The configurations of the two embodiments of the present invention have been described above, and the operation thereof will now be described.

Electric motor CI! When 11 is driven, the main drive shaft (tSa) rotates through the reduction gear head and the coupling, and the crank arm (XZa) and therefore the frame ring and the other crank arm (1
2b) performs a parallel rotating crank motion while maintaining a parallelogram. As shown in Fig. 4, in the upper half period P' of the main drive shaft (1511), as shown in Fig. 2, the actuating plate (9)
protrudes upward from the article receiving plate (6), and therefore the article M to be transferred (indicated by the dashed line in Fig. 2) rests on this and is moved to the It is moved to the right in Figure 1. Next, when the rotation phase of the lower half period Q' is reached, the second operating plate (9) is retracted downward by the receiving plate (6), so that the casting M is now received by the receiving plate (6). At this time, the receiving plate (6) is vibrated in its extending direction, that is, in the vertical direction, by the vibrating electric motor (2m) (2b), so that the casting M being supported by this is shaken of sand by the vibration force. . Then, at the next upper half period P', the actuating plate (9) again protrudes upward through the gap between the receiving plates (6), and the casting M is again received by these actuating plates (9). It is moved to the right in FIG. That is, in a rotation phase of 180° in the upper half, that is, in one upper half period P' by the size of the rotation diameter, the casting M is transferred to the right in FIG. In the lower half period Q', vibration motors (2a) (2b) K are not transferred.
The sand is removed by the vibration caused by the sand. Although not shown in the drawings, a conveyor is provided below the platform αη to receive the sand from above, so that the sand is transferred to the outside. The casting M, which has had enough sand removed, is shown in Figure 1 as a plate (
It is discharged outward from the right end of 6) or (9). If a conveyor is connected to this, although not shown, the casting M will be conveyed to the next process.

Although the effects of the two embodiments of the present invention have been described above, the following effects are also achieved.

That is, in this embodiment, the driven shaft (15b) is supported by the rubber plate (G), so in FIG.
b) Or if there is a dimensional error in the centers o, l o, and the length d' between them, the active crank (
+1) rotation causes the shaft center 04, that is, the axis center of the driven side (15b
) is vibrated vertically or horizontally to absorb dimensional errors, thereby preventing the application of force that would cause damage to these members ( (b) and (c), and ensuring smooth rotational movement. In other words, according to this embodiment, the mounting positions of the crank arms (t2a) (12b) on the frame α, the bearing members (tax) (tab
) and the center of the inner ring of the bearing block (xaa) (t
ab)) or the distance between the axes of the shaft (15m) (15b) supported by the bearing block (t6m) (1
Even if there are some dimensional errors in the mounting position of the base αη of 6b), these are to be absorbed. Therefore, even if the above-mentioned members are not processed with high precision, arranged, and attached, etc., the device can operate stably and transfer the article sufficiently smoothly.

Furthermore, according to two embodiments, an unbalanced weight (25g
) (25b) is attached to the shaft (ts shoe) (t5b), making it possible to reduce the moment of one rotation.

Therefore, the capacity of the motor Qυ can be made much smaller than when the unbalanced weight 4 is not installed. Therefore, if a pebble or the like gets stuck in the gap between the plates (6) and (9), conventionally, the capacity of the stain mover is large due to this biting, so a load is applied to drive the actuating plate (9). Because of this, there was a risk that the plates (6), (9), etc. would be damaged. However, according to this embodiment, since the capacity of the electric motor Qυ is small, the electric motor Qll easily stops when a pebble gets stuck in it as described above. This prevents the plates (6) and (9) from being damaged by biting of pebbles.

Although the first embodiment of the present invention has been described above, the second present invention is of course not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, it was applied to sand removal from castings,
The present invention is not limited to this, and the present invention may be applied only to simply transporting some kind of article. In this case, the vibration electric motors (2a) (2b), springs (5m) (5b), etc. can be omitted, resulting in a much simpler configuration.

Further, in the above embodiments, the driven shaft side is supported by a rubber spring as an elastic member, but other members such as an air spring may be used as the elastic member.

Further, in the above embodiment, an unbalanced weight (25m) (25b) was provided in order to reduce the capacity of the motor, but of course, the effects of the present invention will not be lost even if this is omitted.

〔Effect of the invention〕

As described above, according to the parallel crank-type article/product sorting device of the present invention, the rotational movement of each member can be made smooth and the rotational movement of each member can be made smooth without increasing the processing accuracy or the accuracy of the placement position of each member. It is possible to prevent damage and reliably obtain the original transport effect of the article.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of a parallel crank type article transfer device according to an embodiment of the present invention, Fig. 2 is a rotational front view, Fig. 3 is an open plan view, and Fig. 4 shows the principle of construction of the above embodiment. FIG. 5 is a principle diagram showing the principle of a conventional parallel crank type article transfer device. Please see the diagram.

Claims (1)

[Claims] a driving crank rotatable around a first center; a driven crank rotatable around a second center and having the same length as the driving crank; an actuator pivotally attached to one end of each of the driving crank and the driven crank; a link, a driving part that rotates the driving crank around the first center, and an article receiving part, and a line segment connecting the driving crank, the driven crank, the operating link, and the first center and the second center. form a parallelogram, and when the drive unit rotates the active crank, the article to be transferred is received on the working link in about half a period of the rotation, and the article to be transferred is transferred from the working link in about the second half period of the rotation. In the parallel crank type article transfer device, the first center is fixed, but the first center is fixed, and the article is transferred in a fixed direction on the article receiver by removing the article and receiving the article by the article receiver. A parallel crank type article transfer device characterized in that the second center is supported by an elastic member so as to be able to be slightly displaced.