JP2007075952A - Conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveying device which prevents vibration and "creak" of a main driving source or an auxiliary driving source or the like, and improves the durability of them by avoiding excessive increase of load weight applied on the main driving source, and by suppressing reduction in the ability of the auxiliary driving source to impart a balancing load to a conveyed object. <P>SOLUTION: The conveying device 1 conveys a workpiece by advancing/retreating a moving object 4 with an advancing/retreating mechanism. The advancing/retreating mechanism is composed of: the main driving source 5 advancing/retreating the moving object 4; and the auxiliary driving source 6 applying a balancing load offsetting the load weight applied on the main driving source 5 to the moving body 4. The distance L2 from the straight line C3 passing the power point of the auxiliary driving source 6 to the working point of the auxiliary driving source 6 on the straight line C2 passing the center of the moving object 4, is shortened by providing the auxiliary driving source 6 in the position adjacent to the moving object 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a transport apparatus, and more particularly to a transport apparatus mainly including a molded product take-out machine attached to an injection molding machine for molding a resin molded product.

  Conventionally, a resin molded product produced by an injection molding machine (hereinafter referred to as a molded product) is automatically taken out by a molded product take-out machine. As this type of molded product take-out machine, for example, the one shown in FIGS. 7 and 8 has been proposed (Patent Document 1).

  The molded product take-out machine 1 described in Patent Document 1 shown in FIGS. 7 and 8 includes a movable mold 3a and a fixed mold 3b when the mold apparatus 3 of the injection molding machine 2 is opened. It has a function as a conveying device that enters in between, grasps the molded product held by the movable mold 3a, takes it out of the injection molding machine 2, conveys it to a predetermined position and releases it.

  The molded product take-out machine 1 moves up and down the moving body 4 (in the direction of arrows ZZ) to function as a lifting unit that takes out the molded product or the molded product and the runner out of the mold apparatus 3; And an auxiliary drive source 6 that applies a balance load to the moving body 4 in a direction that cancels the load weight applied to the main drive source 5, and these are installed in the base portion 12, and the base portion 12 Is moved forward and backward in the opening / closing direction (arrow XX direction) of the mold apparatus 3 in the injection molding machine 2 along the drawing frame 7, so that the molded product is gripped by the molded product gripping portion 10 attached to the moving body 4. The movable body 4 and the molded product gripping portion 10 are made to function as a pulling portion for pulling out, and by moving the pulling frame 7 back and forth in the direction (arrow YY direction) perpendicular to the arrow XX direction along the transverse frame 8. Grip at the molded product gripping part 10 Taken out the molded article 2 outside the injection molding machine has a function of releasing and conveyed to a predetermined position. The main drive source 5 is constituted by a servo motor, the auxiliary drive source 6 is constituted by an air cylinder device, and the moving body 4 is supported by a rod 6 a of the auxiliary drive source 6 via a support arm 9.

  According to the molded product take-out machine 1 configured as described above, when the molded product is gripped by the molded product gripping unit 10, the auxiliary drive source 6 moves the balance load that offsets the load weight applied to the main drive source 5. Therefore, the power consumption of the main drive source 5 can be saved.

JP 2003-39372 A

  However, in the molded product take-out machine 1 described in Patent Document 1, the distance L1 from the straight line C1 passing through the power point of the main drive source 5 to the operating point of the main drive source 5 located on the straight line C2 passing through the center of the moving body 4. Since the distance L2 from the straight line C3 passing through the power point of the auxiliary drive source 6 to the operating point of the auxiliary drive source 6 on the straight line C2 passing through the center of the moving body 4 is set to be significantly larger, the main drive source When the balance load that cancels the load weight applied to 5 is applied to the movable body 4 by the auxiliary drive source 6, that is, the balance load that cancels the total weight of the movable body 4, the molded product gripping portion 10, the molded product, and the like. Is applied to the moving body 4 by the auxiliary drive source 6, a large moment M proportional to the distance L 2 (moment arm length L 2) is generated in the support arm 9 when the load weight is constant. And Has a possibility to flex the lifting arm 9 as shown by the two-dot chain line, this presents the appearance of molded article becomes much more pronounced in the case of a heavy large.

  In this way, when the support arm 9 is bent, the straight line C2 passing through the center of the moving body 4 is inclined and the vertical posture of the moving body 4 is impaired, and this is caused by the main driving source 5 and the movable body 4 and the molded product gripping portion. 10 acts so as to prevent the smooth elevation of 10, excessively increases the load weight applied to the main drive source 5, and vibration and “squeak” are generated in the main drive source 5. Further, when the support arm 9 is bent, the rod 6a of the auxiliary drive source 6 is bent as shown by a two-dot chain line, so that the rod 6a is prevented from moving up and down smoothly. In addition to reducing the ability to apply a balance load to the auxiliary drive source 6, vibration and “squeaking” are generated in the auxiliary drive source 6. In other words, the main drive source 5 and the auxiliary drive source 6 have vibrations and “squeaks” that hinder smooth operation, thereby causing a problem of accelerating their deterioration.

  The present invention solves such a problem, and an object of the present invention is to avoid an excessive increase in the load weight applied to the main drive source and to provide a moving body by the auxiliary drive source. It is an object of the present invention to provide a transport device that can prevent vibrations and “squeaking” of a main drive source and an auxiliary drive source and can improve the durability of these by suppressing a decrease in the balance load application capability.

  The present invention relates to a transport device that transports a workpiece by moving a moving body forward and backward by an advancing / retreating mechanism, wherein the advancing / retreating mechanism includes a main drive source for moving the moving body forward and backward, and a load weight applied to the main drive source. And an auxiliary drive source for applying a balance load to be offset to the movable body, and the auxiliary drive source is provided at a position adjacent to the movable body.

  According to this, since the auxiliary drive source is provided at a position adjacent to the moving body, the distance between the moving body and the auxiliary drive source (the length of the moment arm) is shortened. Can be suppressed small, and the load weight applied to the main drive source can be prevented from excessively increasing, and the balance load application capability of the auxiliary drive source to the moving body can be suppressed from decreasing.

  In the present invention, it is desirable to provide a plurality of auxiliary drive sources. According to this, the balance load that cancels the load weight applied to the main drive source can be evenly distributed and applied to the moving body by the plurality of small auxiliary drive sources.

  Further, according to the present invention, the auxiliary drive source has three positions: one position on a straight line extending from the movable body toward the installation position of the auxiliary drive source, and a pair of point-symmetric positions sandwiching the straight line. In this case, it is desirable to dispose at least a pair of points symmetrical with respect to the point. According to this, the balance load that cancels the load weight applied to the main drive source is arranged at three small auxiliary drive sources arranged at three positions or at a pair of positions with respect to the moving body. The two small auxiliary drive sources can be evenly distributed and stably provided in a balanced manner.

  Further, according to the present invention, the conveying device advances and retracts the movable body in the opening / closing direction of the mold device in the resin molding machine, and pulls out the molded product, and lifts and lowers the movable body to remove at least the molded product from the mold. It is desirable that the molded product take-out machine comprises an elevating part to be taken out by the main drive source and the auxiliary drive source. According to this, the moment generated in the auxiliary drive source is suppressed to be small, the load weight applied to the main drive source is excessively increased, and the ability to apply the balance load to the moving body by the auxiliary drive source is reduced. It is possible to provide a molded product take-out machine that suppresses vibrations and “squeaking” of the main drive source and the auxiliary drive source with certainty and ensures their smooth operation to improve durability.

  According to the present invention, since the distance between the moving body and the auxiliary drive source (the length of the moment arm) is shortened, the moment generated in the auxiliary drive source is kept small, and the load weight applied to the main drive source is excessive. It is possible to suppress an increase and a decrease in the ability to apply a balance load to the moving body by the auxiliary drive source. Therefore, it is possible to reliably prevent such vibrations and “squeaks” of the main drive source and the auxiliary drive source to ensure their smooth operation and improve durability.

  FIG. 1 is a schematic front view showing a first embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a left side view of FIG. In addition, the same code | symbol is attached | subjected to the same or an equivalent part as the prior art example shown in FIG.7 and FIG.8, and description of the overlapping structure and effect | action is abbreviate | omitted.

  1 to 3, the auxiliary drive source 6 is composed of one air cylinder device, and this auxiliary drive source 6 is located adjacent to the back of the moving body 4 and passes through the center O of the moving body 4. The auxiliary drive source 6 is installed on the base portion 12 on the straight line C4 extending in the direction of the installation position. Then, the lower end of the rod 6a extending through the base portion 12 is connected to one end portion of the support arm 9, and the moving body 4 is placed and fixed to the other end portion of the support arm 9, thereby moving the rod. The body 4 has a structure supported by the rod 6a of the auxiliary drive source 6 through the support arm 9.

  As described above, the auxiliary drive source 6 composed of one air cylinder device is installed on the base portion 12 at a position adjacent to the back portion of the moving body 4, so that a straight line C3 passing through the power point of the auxiliary drive source 6 is obtained. Since the distance L2 ′ from the operating point of the auxiliary driving source 6 on the straight line C2 passing through the center of the moving body 4 is shorter than L2 in FIG. 7, the moment generated in the auxiliary driving source 6 is suppressed to be small, The bending of the support arm 9 is avoided. For this reason, the straight line C2 passing through the center of the moving body 4 does not incline, the moving up and down of the moving body 4 and the molded product gripping part 10 by the main drive source 5 is ensured, and the load weight applied to the main drive source 5 Does not increase excessively.

  In addition, since the bending of the support arm 9 is avoided, the bending of the rod 6a of the auxiliary drive source 6 is avoided, so that the rod 6a can be smoothly lifted and lowered by the auxiliary drive source 6. A reduction in the ability to apply a balance load to the moving body 4 is suppressed, and vibrations and “squeaking” are not generated in the main drive source 5 in the auxiliary drive source 6, thereby improving the durability. Therefore, vibrations and “squeaking” are not generated in the main drive source 5 and the auxiliary drive source 6, and the molded product take-out machine 1 with improved durability can be provided.

  As shown in FIG. 4A, the auxiliary drive source 6 is constituted by a pair of air cylinder devices, and these pair of air cylinder devices are positioned adjacent to the back of the movable body 4 and the center of the movable body 4. Even if it is arranged on the base portion 12 at a point-symmetrical position with a straight line C4 extending in the direction of the installation position of the auxiliary drive source 6 passing through O, L2 'can be shortened from L2 in FIG. Therefore, vibration and “squeak” are not generated in the main drive source 5 and the auxiliary drive source 6, and the durability can be improved, and the balance load that cancels out the load weight applied to the main drive source 5. Can be uniformly distributed to the moving body 4 by the auxiliary drive source 6 including a pair of small air cylinder devices and stably provided in a balanced manner. Further, as shown in FIG. 4B, the auxiliary drive source 6 is constituted by three air cylinder devices, one of which is arranged on the straight line C4, and the remaining two are the center of the moving body 4. Even if it is arranged at a pair of point-symmetrical positions with a straight line C4 extending in the direction of the installation position of the auxiliary drive source 6 passing through O, L2 'can be shortened from L2 in FIG. 5 and the auxiliary drive source 6 are free from vibrations and “squeaks”, and the durability thereof can be improved, and a balance load that cancels the load weight applied to the main drive source 5 is applied to the movable body 4. On the other hand, the auxiliary drive source 6 comprising a pair of small air cylinder devices can be uniformly distributed and stably provided with a good balance.

  In addition, the installation position of the auxiliary drive source 6 which consists of one air cylinder apparatus in 1st Embodiment of FIGS. 1-3 is the position adjacent to the front part of the mobile body 4, as shown to Fig.5 (a). There may be. In addition, the arrangement position of the auxiliary drive source 6 including the pair of air cylinder devices in the second embodiment in FIG. 4A is a position adjacent to the front portion of the moving body 4 as shown in FIG. It may be. Furthermore, the arrangement position of the auxiliary drive source 6 including the three air cylinder devices in the third embodiment of FIG. 4B is a position adjacent to the front portion of the moving body 4 as shown in FIG. It may be. 4 (a), 4 (b), 5 (a), 5 (b), and 5 (c), the same or corresponding parts as those in the first embodiment in FIGS. Thus, the description of the overlapping structure and operation is omitted.

  In each of the above embodiments, the molded product gripping portion 10 is described as being provided outside the movable body 4, but as shown in FIG. 6, the molded product gripping portion 10 is connected directly below the movable body 4. In the case of a model in which the movable body 4 is accommodated in the housing 13 so as to be movable up and down, adjacent to the left side of the housing 13 that functions as the movable body 4 (position of the molded product gripping portion 10 in each of the above embodiments), Even if the auxiliary drive source 6 consisting of one air cylinder device is installed, or the auxiliary drive source 6 consisting of one or three air cylinder devices is arranged as in the second and third embodiments, The same effects as those of the above embodiments can be obtained. In FIG. 6, the same or corresponding parts as those in the embodiment of FIGS. 1 to 4 (a) and 4 (b) are denoted by the same reference numerals, and the description of the overlapping structure and operation is omitted.

It is a schematic front view which shows 1st Embodiment of this invention. It is a top view of FIG. It is a left view of FIG. FIG. 4A is a schematic plan view of the second embodiment, and FIG. 4B is a schematic plan view of the third embodiment. FIG. 5A shows a modification of the first embodiment, FIG. 5B shows a modification of the second embodiment, and FIG. 5C shows a modification of the first to third embodiments of the present invention. It is a modification of 3rd Embodiment. It is a front view which shows 4th Embodiment of this invention. It is a schematic front view of a prior art example. FIG. 8 is a plan view of FIG. 7.

Explanation of symbols

1 Mold take-out machine (conveyance device)
2 Injection molding machine (resin molding machine)
3 Mold device 4 Moving body (lifting part)
5 Main drive source 6 Auxiliary drive source 7 Extraction frame (extraction part)
10 Molded product gripping part (lifting part)
C4 Straight line extending from the moving body to the position of the auxiliary drive source

Claims (5)

In a transport device that transports a workpiece by moving a moving body forward and backward by an advance / retreat mechanism,
The advance / retreat mechanism includes a main drive source for moving the movable body forward and backward, and an auxiliary drive source for applying a balance load that cancels a load weight applied to the main drive source to the movable body. A transport apparatus characterized in that a source is provided at a position adjacent to the movable body. In the conveyance equipment according to claim 1,
A transport apparatus comprising a plurality of the auxiliary drive sources. In the conveyance apparatus of Claim 1 or Claim 2,
The auxiliary drive source has at least the point at three positions of one position on a straight line extending from the moving body in the direction of the installation position of the auxiliary drive source and a pair of point-symmetric positions sandwiching the straight line. A conveying apparatus characterized by being disposed at a pair of symmetrical positions. In the conveying apparatus of Claim 1, Claim 2 or Claim 3,
The conveying device includes: a pulling unit that pulls out the molded product by moving the movable body forward and backward in the opening / closing direction of the mold device in the resin molding machine; and a lifting unit that lifts and lowers the movable body to extract at least the molded product out of the mold. And a lifting device comprising a main drive source and an auxiliary drive source. In the conveying apparatus according to claim 1, claim 2, claim 3 or claim 4,
The main drive source comprises a servo motor, and the auxiliary drive source comprises an air cylinder device.

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