JPS63288812A - Parallel crank material carrying device - Google Patents

Abstract

PURPOSE:To reduce volume at driving section and to prevent intrusion of foreign matter, in a parallel crank material carrying device for removing sand from a cast, by fixing an unbalancing weight having rotary moment approximate to that of entire functioning mass around respective central shafts to respective central shafts of main and sub cranks. CONSTITUTION:A main drive shaft 15a is driven to cause parallel rotary crank motion of a crank arm 12a, a base 11, and a crank arm 12b so as to lift, advance, lower or retreat a material receiving board 6 by means of an operating board 9 thus carrying a, material. Since unbalance weights 25a, 25b are provided on the main and sub drive shafts 15a, 15b respectively, such that the positions of the center of gravity correspond to those of the base 11, the operating board 9, etc., which are higher than the shafts 15a, 15b, rotary moment of the central shaft can be reduced. Consequently, the capacity of the motor can be reduced and the size of driving section can be reduced, while furthermore intrusion of foreign matter can be prevented and the device can be protected from breakdown.

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
A person has a main drive crank rotatable around a first central axis O3,
C is a driven crank that is rotatable around the second central axis O and has the same length as the driving crank A; B is an operating link that is pivotally connected to one end of each of the driving crank and the driven crank C; Yes.

A parallelogram is formed by a line connecting the active crank C1, the driven crank C1, the operating link B, and the first central axis 01 and the second central axis O2. When driving rotationally around the working link B, during a half period P of the rotation, the article to be transferred is received on the working link B, and in the latter half period Q, the working link B
The article is removed from the transfer surface SK of the article receptacle (consisting of, for example, a number of slatted bars, between which the actuating link B is located) to receive the article. The upper part is moved in a fixed direction.

However, in the above device, at the start of driving, the first center of gravity of the entire mass including the operating link, the portion corresponding to the operating link, or the article to be transferred received by the portion is located at the first point.
The rotational moment of the central axis or the second central axis? The drive unit must generate a driving force that overcomes the Once the shaft is rotated, a large driving force is not required due to inertia. Therefore, it is necessary to provide a drive unit (electric motor) with an unreasonably large capacity compared to the driving force during rotation.

Furthermore, during rotational drive, for example, if sand or pebbles get caught between the grates and impede the relative movement between the operating link and the article receiving part, the electric motor has a very large capacity, so the operating link cannot be forcibly driven. There is a risk that the link article receiving portion may be damaged.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a parallel franking article transfer device that can reduce the capacity of the drive part and prevent damage to various parts of the sifting device, such as intrusion of foreign matter. With the goal.

[Means for solving problems]

The above object is to provide a main drive crank that is rotatable around a first center axis, a driven crank that is rotatable around a second center axis and has the same length as the main drive crank, and a drive crank that is rotatable around a first center axis and has the same length as the main drive crank. It consists of an actuation link pivotally attached to one end, a driving part that rotates the driving crank about the first central axis, and an article receiving part, the driving crank, the driven crank, the actuation link, and the first central axis and second
A parallelogram is formed by the line segments connecting the central axis.

When the driving crank is rotationally driven by the drive unit, the article to be transferred is received on the operating link during about half a cycle of the rotation, and the article is separated from the operating link during about a half cycle after the rotation. In a parallel crank type article transfer device, in which the article is received by a receiving portion and transferred in a fixed direction on the article receiving portion, the actuating link or a portion corresponding to the actuating link or a portion of the transferring portion that is received by the actuating link or the portion corresponding to the actuating link. rotational moment of the first center axis or the second center axis of the center of gravity of the entire mass including the object
In contrast to C, unbalanced ionization is applied to at least one of the first central axis and the second central axis in order to obtain a rotational moment symmetrically approximate to the rotational moment with respect to the first central axis or the second central axis. This is achieved by means of a parallel crank type article transfer device, which is characterized in that it is mounted on a parallel crank.

[For production]

Due to the rotational moment of unbalanced ionization, the driving force of the driving section at the start of driving can be made much smaller than in the past.

Once in the driving state, the required driving force becomes small, so that the article transfer action can be performed without any problem.

Additionally, if a foreign object such as a pebble gets caught in the gap between the operating link and the article receiving part and tries to prevent the relative movement between them, the capacity of the drive part is small, so it will not try to rotate further and will stop. It ends up. Therefore, damage caused by foreign matter biting into these members is prevented.

Furthermore, since the capacity of the drive section can be reduced, the cost of the device can be reduced.

〔Example〕

A parallel crank type article transfer device according to an embodiment of the present invention will be described below with reference to FIGS. 5 to 4. This device is applied to removing sand from castings, and in FIG. 9, 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 receiver (4) (4) projecting laterally at the lower part of the side wall plate (3) and the lower column (8) (8). There is. That is, the side wall plate (3
) can be vibrated in the vertical direction by driving vibrating electric motors (2m) (2b).

As shown in Fig. 1, the side wall plates (3) are reinforced with reinforcing ribs at various parts.9 Both side wall plates (3) are connected at their lower parts by a plurality of horizontal members (7), and these members A large number of article receiving plates (6) are arranged and fixed in parallel on (7) at predetermined intervals.

The vibrating section (1) is constructed as described above, but independently of this, a stand αη having a larger external shape is provided below the side wall plate (3). As shown in FIG. 3, it has a rectangular shape, and a mounting block Q0 for fixing a large number of actuating plates (9) is fixed at the intermediate portion of the front and rear short sides. Numerous actuating plates (
As shown in FIG. 2, 9) are located between the above-mentioned article receiving plates (6). And these extend parallel to the top and bottom.

A crank arm (xza) (12b) extending downward is fixed to the opposite long side of the frame (b), and a bearing member (131) (13b) is provided integrally with this. The shafts (lsa) and (xsb) are fixed to the parts (14m) and (14b) unevenly distributed from the center thereof. Axis (xsa
) (xsb)' is the bearing block (lsa) (t6
b) is rotatably supported. One bearing shaft (16 m) is installed directly on the base αη, but in this embodiment, the right shaft (15 m) in Fig. 1 is installed directly on the base αη.
) is the main drive shaft, and the left shaft (15b) is the driven shaft.

Therefore, the main drive shaft (15m) is connected to the reducer (15m) by the electric motor Qυ.
) and the coupling, and this rotational driving force is transmitted to the driven shaft (tab) via the frame aυ and the other crank arm (12b).

In this embodiment, the bearing block (1sm) on the driving shaft (151) side is integrally fixed to the base Q7)K, but the pairing block (16b) on the driven side is fixed to the rubber plate Q
It is supported on a base (b) via ISt. That is, the bearing block (tab), and thus the shaft (15b) supported by it, can be displaced vertically and horizontally in FIG. 1 by deforming a rubber plate (t), which is an elastic member. Also, this bearing block (lsb)
A stopper member is fixed to the base Q7)K located on the side of the mounting board to which the Q7) is attached. This regulates the amount of upward movement of the pairing tab. As shown in Fig. 3, a crank arm (tza) (12b) is also fixed to the opposing long side of the mount ση, but this driven side bearing block (x
sb) is similarly supported on the base (b) by a rubber plate (to). A crank member is attached to the other end of the shaft (151X15b), and these are further connected by a coupling member.

As clearly shown in Figures 2 and 3, on the main drive shaft (15 ohtori) side, there is a reducer (1) and a bearing block (16 m).
An unbalanced weight (25 m) is fixed between the driven shaft (15b) and an unbalanced weight (25b) having a similar shape is fixed to one end of the driven shaft (15b). This unbalanced weight (25m) (zsb
) is semicircular as shown in Figure 1, but
These center of gravity positions are configured to be located opposite to the center of gravity of the gantry aυ1 operating plate (9), etc. located above the axis (15m) (15b). That is, this device is driven by the drive of the electric motor translator, and the rotational moment of the entire driven object is configured to be as small as possible by the unbalanced weight (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 (1) is the bearing block (1611) K supported shaft (15 Emperor) in Figure 1.
The inner ring (141) of the bearing member (13m) from the axis of
Similarly, the driven crank (-) corresponds to the eccentric distance of
In the figure, the axis of the driven wheel (15b) supported by the bearing block (tab) K is
Corresponds to the distance from the center of the inner ring (t4b) in b). In addition, the operating link (b) is the bearing member (1) in FIG.
3m) (lab) corresponds to the distance between the centers of the inner rings (14m) (14b). Further, (d) corresponds to the distance between the axial center of the main shaft (15 m) and the axial center of the driven shaft (xsb). The shaft on the driven shaft side (i5m) is supported by a rubber plate (to) serving as a spring.

The structure of the embodiment of the present invention has been described above, and the operation thereof will now be described.

When the electric motor I211 is driven, the main drive shaft (lS) rotates through the reducer (e) and the coupling, and the crank arm (121), the frame ση, and the other crank arm (
5zb) performs parallel rotating crank motion while maintaining a parallelogram. As shown in Fig. 4, in the period P' of the upper half of the main drive shaft (15 m), as shown in Fig. 2, the operating plate (9)
protrudes upward from the article receiving plate (6), so the article M to be transferred (indicated by the dashed line in Fig. 2) is placed on it, and the first In the figure, the casting M is transferred to the right side.Next, when the rotation phase of the downward half period Q' is reached, the first operating plate (9) is retracted downward from the receiving plate (6), and the casting M is now moved to the right side. It is received by the receiving plate (6). At this time, the receiving plate (
6) is vibrating in its extending direction, that is, in the vertical direction, so that the casting M that is being supported by this is stripped of sand by the vibrating 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) K. It is moved to the right in FIG. That is, in the rotation phase of the upper half of 180°, 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', the sand is not transferred but is removed by vibration from the vibrating electric motor (2m) (2b). Prize 1 Although not shown in the figure, there is a conveyor placed below the gantry to receive the sand from above, which acts as a trap to transport the sand to the outside. The casting M, from which sand has been sufficiently removed, is discharged outward from the right end of the plate (6) or (9) in FIG. Even if not shown, if a conveyor is connected to this, the casting M will be transported to the next process.

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

That is, in this embodiment, the driven shaft (x5b) is supported by the rubber plate (to), so in FIG. ) or there is a dimensional error in the center o, lo, and the length d' between them, and even if the parallelogram is not formed accurately, the center 0! That is, the axis center of the driven side (15
These members (1) (b) (C) vibrate and displace vertically or horizontally to absorb dimensional errors.
This prevents the application of force that would cause damage and ensures smooth rotational movement. In other words, according to this embodiment, the mounting positions of the crank arms (12a) (12b) to the frame αη, the bearing members (laa) (t
center of the inner ring of ab) and the bearing block (t6a)
(distance between the axes of the shaft (15m) (t5b) supported by the bearing block (tea)
Even if there are some dimensional errors in the mounting position of the base Qη of (tab), these will 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 this embodiment, the unbalanced way) (2
By attaching the 5m) (25b) to the shaft (15m) (15), the moment of one rotation can be reduced.

Therefore, the capacity i of the electric motor +211 can be made much smaller than when this unbalanced weight ■ is not installed. Therefore, if a pebble or the like gets stuck in the gap between the plates (a) and (9), conventionally, this bit would cause the electric motor to have a large capacity, so a load would be applied to drive the actuating plate (9). There was a risk that this would damage the K side plates (6), (9), etc. However, according to this embodiment, since the capacity of the electric motor (211) is small, the electric motor Qυ will easily stop if a pebble gets stuck in it as described above.

Therefore, the plates (6) and (9) are prevented from being damaged due to biting of pebbles.

Although the two embodiments of the present invention have been described above, the present invention is of course not limited to these, 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 K in order to simply transport some kind of article. In this case, the vibration electric motor (2b), spring (5b), etc. can be omitted, resulting in a simpler configuration.

Further, in the above embodiments, the driven shaft side is supported by a rubber spring as an elastic member, but this may be omitted. In this case, it is necessary to accurately size and arrange each member, but the effects of the present invention are not lost.

Further, in the above embodiments, the unbalance weight is attached to both the driving shaft and the driven shaft, but it may be attached to only one of them. Even in this case, the capacity of the drive section can be made smaller than in the conventional case. Further, in the above embodiment, the unbalanced weight has a semicircular shape, but other shapes may be used, and the center of gravity of the unbalanced weight is located directly below the axis of the driving shaft or the driven shaft when stopped.

It is also possible to mount the drive unit at another angular position, taking into account the relative position of the mass of the entire driven unit with respect to the center of gravity.

〔Effect of the invention〕

As described above, according to the parallel crank type article transfer device of the present invention, the capacity of the drive section can be made much smaller than in the past, and the cost of the device can be reduced.

Further, foreign objects such as pebbles are prevented from getting caught in the gap between the actuating link and the article receiving portion and damaging these members.

[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. In addition, in the figure.

Claims (1)

[Claims] a driving crank that is rotatable around a first central axis; a driven crank that is rotatable around a second central axis and has the same length as the driving crank; and a driven crank that is pivotally connected to one end of each of the driving crank and the driven crank. The main drive crank, the driven crank,
A parallelogram is formed by the operating link and a line connecting the first central axis and the second central axis, and when the drive unit rotates the active crank, the operating link is The article to be transferred is received by the article receiving section, and in about the next half cycle, the article is separated from the operating link and the article is received by the article receiving section, so that the article is transferred in a fixed direction on the article receiving section. In the parallel crank type article transfer device, the first center axis or the second center of gravity of the entire mass including the article to be transferred, which is received by the operating link or a portion corresponding to the operating link or the portion;
In order to obtain a rotation moment approximately symmetrical to the rotation moment about the first center axis or the second center axis with respect to the rotation moment about the center axis, the first center axis and the second center axis may be A parallel crank type article transfer device characterized in that an unbalanced cone is attached to at least one of the devices.