JP3172670U - Grip chain - Google Patents

Abstract

Provided is a chain with a gripper that can convey a workpiece with or without a flange, can prevent the rotation of an elastic grip, and can stably convey for a long period of time.
Individual chain bases 10 constituting a transport chain are provided. The chain base 10 is connected to an elastic grip 20 that elastically holds the workpiece. The elastic grip 20 is provided with a rectangular contact piece 21 that is curved in the direction opposite to the conveying direction. A connecting body 22 is provided along the longitudinal direction of the base end portion of the contact piece 21. A pair of connecting portions 11 for connecting the longitudinal end portions of the elastic grip 20 to the chain base 10 are provided in a protruding manner. The elastic grip 20 is connected between the connection protrusions 11.
[Selection] Figure 1

Description

  The present invention relates to a grip chain suitable for conveying a small-diameter or short cylindrical object such as a preform or a syringe.

  Conventionally, to convey while maintaining a vertical state without tilting a small diameter cylindrical object such as a preform used as a prototype of a PET bottle or a syringe used as a syringe barrel of a syringe, It cannot be carried on the top plate.

  Therefore, conventionally, a conveying device described in Patent Document 1 has been proposed as a conveyor chain for conveying such a small-diameter or short cylindrical object such as a preform. In this conveying device, the flange of the preform is locked to the supporting protruding pieces arranged on both sides. In particular, it is easy to transport preforms with different body outer diameters directly under the flange by making the protrusion length of one support protrusion piece different from the protrusion length of the other support protrusion piece. It is configured to be able to cope with this only by making a simple change.

  On the other hand, the present applicant has previously proposed an elastic grip for a grip chain that can stably hold and hold the workpiece described in Patent Document 2. According to this elastic grip, grip pieces that are arranged at equal intervals along the conveying direction of the chain base and are curved when the workpiece is held under pressure are formed. That is, when a locking ridge is formed at the tip of the grip piece and the work is clamped and held, the edge of the grip piece adjacent to the locking step of the locking ridge of the grip piece is engaged respectively. It is configured to stop. With such a configuration, even when the workpiece is small, a stable holding force can be exhibited, and the unprecedented effect that the holding force can be held in a well-balanced manner with a constant reaction force of the grip piece is obtained.

Japanese Patent No. 4224274 Utility Model Registration No. 3162603

  However, in the transport device of Patent Document 1, when transporting a preform with different body outer diameters directly below the flange, the projecting length of one supporting projecting piece and the projecting length of the other supporting projecting piece are always adjusted. There is a need to. In addition, preforms and the like tend to have progressively smaller preform shapes as the PET bottles become lighter. Therefore, in order to lock the flange of the preform with the support protruding piece, extremely accurate adjustment is required.

  Moreover, since the conveyance apparatus of patent document 1 is a structure which latches the flange of a workpiece | work to a pair of opposing support protrusion, even if it is a cylindrical object of the same small diameter, when the shape of a flange differs greatly, it is supported. There is a possibility that it cannot be adapted only by adjusting the protruding length of the protruding piece. Furthermore, there is a problem that the workpiece in which no flange is formed cannot be transported anymore.

  On the other hand, in the elastic grip of Patent Document 2, a mounting hole is opened in the longitudinal center portion of the chain base, and the mounting protrusion of the elastic grip is inserted into the mounting hole for mounting. Turned out to rotate. That is, when a workpiece having a tapered side surface is transported, the pressure-bonding force varies depending on the position where the elastic grip contacts. Therefore, there is a possibility that the deflected force is applied to the elastic grip, and the elastic grip fixed by the mounting protrusion at the longitudinal center portion of the elastic grip rotates. For this reason, the gap between the elastic grips is shifted during the conveyance for a long period of time, so that an accurate holding posture cannot be ensured, and there is a possibility that the workpiece may be dropped or pinched during delivery during attachment.

  Therefore, the present invention was created to solve the above-mentioned problems, and when transferring a workpiece of a small-diameter cylindrical object such as a preform or a syringe, it is possible to transfer the workpiece with or without a flange. In addition, an object of the present invention is to provide a grip chain that prevents the rotation of the elastic grip even if a cylindrical body portion with a taper is sandwiched, and that can be stably conveyed for a long period of time.

  In order to achieve the above-mentioned object, the first means of the present invention is mounted on a pair of transport chains 100 that sandwich and transport the work P, and is attached to each chain base 10 constituting the transport chain 100 on the work P. In the grip chain in which the elastic grip 20 that directly contacts and elastically holds the workpiece P is connected, the elastic grip 20 is curved in the direction opposite to the conveying direction so that the side surface of the tip 21A contacts the workpiece. A vertically long rectangular contact piece 21 and a coupling body 22 provided along the longitudinal direction of the base end portion 21B of the contact piece 21 and integrated with a plurality of adjacent contact pieces 21; The base 10 has a pair of connecting portions 11 that connect both ends of the elastic grip 20 in a protruding manner, and the elastic grip 20 is connected between the connecting protrusions 11.

  In the second means, the connecting portion 11 of the chain base 10 has a locking claw shape protruding so as to be opposed to each other, and is locked to both longitudinal end portions of the connecting body 22 in the elastic grip 20. A recess 23 is formed, and the locking claw-shaped tip of the connecting portion 11 is locked to the locking recess 23.

  In the third means, the chain base 10 has a pair of pin joint links 12 arranged vertically, and a bush portion 13 is provided between the pin joint links 12, and the pin joint link 12 and the bush portion 13 are integrated with each other. The connection part 11 is provided at both longitudinal ends of the attachment part 14.

  As described in claim 1 of the present invention, the chain base 10 is provided with a pair of connecting portions 11 for connecting the longitudinal ends of the elastic grip 20, and the elastic grip 20 is mounted between the connecting protrusions 11. Accordingly, even when a cylindrical body portion with a taper is sandwiched, the connecting portion 11 of the chain base 10 prevents the elastic grip 20 from rotating and enables stable conveyance for a long period of time.

  The elastic grip 20 has a vertically long rectangular contact piece 21 that is curved in the direction opposite to the conveying direction so that the side surface of the distal end portion 21A contacts the workpiece, and the longitudinal length of the proximal end portion 21B of the contact piece 21. Since each of the elastic grips 20 connected to the chain base 10 has a small diameter such as a preform or a syringe, since the connection body 22 is provided along the direction and integrated with the adjacent contact pieces 21. When transporting the cylindrical workpiece P, the workpiece P is transported while sandwiching the side surface of the workpiece P. Therefore, the workpiece P can be transported regardless of the presence or absence of the flange.

  As in claim 2, the connecting portion 11 of the chain base 10 has a locking claw shape projecting so as to face each other, and is formed at both longitudinal ends of the connecting body 22 in the elastic grip 20. Since the recess 23 is configured to insert and lock the engaging claw-shaped tip of the connecting portion 11, the holding force of the elastic grip 20 by the chain base 10 can be strengthened. As a result, the rotation of the elastic grip 20 can be reliably prevented even when the workpiece P having an uneven body is conveyed, as in the conventional case, and stable conveyance for a long period of time is possible.

  As in claim 3, the chain base 10 includes a pair of pin joint links 12, a bush portion 13 is provided between the pin joint links 12, and the pin joint link 12 and the bush portion 13 are integrally formed. Since the connecting portion 11 is provided at both longitudinal ends of the attachment portion 14, the elastic grip 20 and the chain base 10 are integrated with each other via the attachment portion 14. Can be linked. As a result, there is no blurring of the elastic grip 20 when the workpiece P is conveyed, and a holding force that is always integrated with the chain base 10 can be provided.

It is a disassembled perspective view which shows the chain base body and elastic grip of this invention. It is a perspective view which shows the connection state of the chain base body and elastic grip of this invention. It is a top view which shows one Example of the elastic grip of this invention. It is a schematic side view which shows one Example of the conveyance chain of this invention. It is a perspective view which shows the use condition of this invention. It is a front view which shows the use condition of this invention. It is a top view which shows the use condition of this invention.

  According to the present invention, when a workpiece of a small-diameter cylindrical object such as a preform or a syringe is conveyed, the workpiece P can be conveyed regardless of the presence or absence of a flange, and the body of the cylindrical object with a taper is provided. This achieves the original purpose of preventing the rotation of the elastic grip even if a portion is sandwiched and enabling stable conveyance for a long period of time.

  Hereinafter, the present invention will be described based on illustrated examples. The grip chain of the present invention is attached to a pair of transport chains 100 that sandwich and transport a workpiece P (see FIG. 5). The elastic grip 20 is connected to each chain base 10 constituting the transport chain 100. In the present invention, the structure is particularly suitable for transporting a small-diameter cylindrical workpiece P such as a preform or a syringe.

  The chain base 10 is provided with a pair of connecting portions 11 for connecting the longitudinal end portions of the elastic grip 20, and the elastic grip 20 is mounted between the connecting protrusions 11 (see FIG. 1). The illustrated connecting portion 11 has a locking claw shape protruding so as to face each other. And the structure which inserts and latches the latching claw-shaped front-end | tip of the connection part 11 is employ | adopted to the latching recessed part 23 formed in the longitudinal both ends of the elastic grip 20 (refer FIG. 2).

  The connecting portion 11 is not limited to the illustrated example. For example, the elastic grip 20 can be configured to project locking portions at both longitudinal end portions thereof and to be locked to locking recesses formed in the connecting portion 11 (not shown).

  The chain base 10 includes a pin joint link 12, a bush portion 13, and an attachment portion 14. The illustrated chain base 10 is formed of a synthetic resin material. A pair of pin joint links 12 connected by a connection pin 30 are arranged vertically, and a bush portion 13 is provided between the pin joint links 12. (See FIGS. 2 and 4). Further, a plate-like attachment portion 14 that is integrally formed with the pin joint link 12 and the bush portion 13 and extends vertically is provided. And the connection part 11 is provided in the up-and-down both ends of the attachment part 14. FIG.

  The elastic grip 20 is a member that directly contacts the workpiece P and elastically holds the workpiece P (see FIG. 6). The elastic grip 20 includes a contact piece 21 and a connecting body 22 (see FIG. 3). The contact piece 21 is a vertically long rectangular member, and is entirely curved in the direction opposite to the conveying direction so that the side surface of the tip 21A contacts the workpiece (see FIG. 7).

  On the other hand, the coupling body 22 is provided at the proximal end portion 21 </ b> B of the contact piece 21. This connection body 22 is provided along the longitudinal direction of the contact piece 21 so that it may integrate with the several adjacent contact piece 21 (refer FIG. 1).

  The illustrated elastic grip 20 has a square hole penetrating the connecting body 22 from both ends of the connecting body 22, and both ends of the square hole are used as locking recesses 23 (see FIG. 2). . Moreover, this latching recessed part 23 may be the latching recessed part 23 of the shape where the edge part of the connection body 22 was dented literally.

  In addition, two contact pieces 21 shown in the figure are arranged in parallel with respect to the coupling body 22. The number of the contact pieces 21 can be arbitrarily changed.

  In the present invention, the configurations and materials of the frame material 10, the traveling rail 20, the magnet 30, the conveyor chain 40, etc., and the configurations and materials of the magnetic rail 20A, the nonmagnetic rail 20B, the connection rail 20C, etc. are limited to the illustrated examples. Instead, the design can be freely changed without changing the gist of the present invention.

P Work 10 Chain base 11 Linking portion 12 Pin joint link 13 Bushing portion 14 Attachment portion 20 Elastic grip 21 Contact piece 21A Tip portion 21B Base end portion 22 Linking body 23 Locking recess 30 Linking pin 100 Conveying chain

Claims (3)

In a grip chain that is mounted on a pair of transport chains that sandwich and transport a workpiece, and that is connected to an elastic grip that is in direct contact with the workpiece and elastically sandwiches and holds the workpiece on each chain base constituting the transport chain,
The elastic grip is provided along the longitudinal direction of the vertically long rectangular contact piece that is curved and formed in the direction opposite to the conveying direction so that the tip side surface contacts the workpiece, and the base end portion of the contact piece, Consists of a connecting body integrated with a plurality of adjacent contact pieces,
The chain base is characterized in that a pair of connecting portions for connecting the both longitudinal ends of the elastic grip project, and the elastic grip is connected between the connecting protrusions.   The connecting portion of the chain base has a locking claw shape protruding so as to be opposed to each other, and a locking recess is formed at both longitudinal ends of the connecting body in the elastic grip. The grip chain according to claim 1, wherein the gripping claw-shaped tip of the connecting portion is locked.   The chain base comprises a pair of pin joint links arranged vertically, a bush portion is provided between the pin joint links, and a plate-like attachment portion formed integrally with the pin joint link and the bush portion. The grip chain according to claim 1, wherein the connecting portion is provided at both longitudinal ends of the attachment portion.

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